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Karyosome Stock Photos and Images
RM2AJHFMP–The cell in development and inheritance . and this in turn often contains Attraction-sphere enclosing two centrosomes. Nucleus -I Plasmosome or true nucleolus Chromatin- network Linin-network Karyosome,net-knot, orchromatin-nucleolus. Plastids lying in thecytoplasm Vacuole Passive bodies (meta-plasm or paraplasm)suspended in the cy-toplasmic meshwork Fig. 6.— Diagram of a cell. Its basis consists of a meshwork containing numerous minutegranules (microsomes) and traversing a transparent ground-substance. one or more smaller bodies or nucleoli. By some of the earlierworkers the nucleus was suppo
RF2GD6HRC–Entamoeba histolytica. Anatomy of trophozoite. Entamoeba is an anaerobic parasitic amoeba that cause infection disease of intestine
RMPFK8YT–. Cytology, with special reference to the metazoan nucleus. Cells. 204 CYTOLOGY CHAP. two different phases of the life cycle of Coccidiam schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or takes the
RMRWK20B–Elements of biology, with special Elements of biology, with special reference to their rôle in the lives of animals elementsofbiolog00buch Year: 1933 30 ELEMENTS OF BIOLOGY type of protoplasm, although it is continuous with the underlying substance. This boundary, known as the plasma membrane, may be, and in many cases is, surrounded by a non-living pellicle or cell WALL, formed by substances constructed by the chemical processes within the cell. CELL WALL N U C u s CHROMATIN KARYOSOME PLASMA MEMBRANE NUCLEAR MEM BRANE NUCLEAR SAP PLASMOSOME LININ PLASTID GOLGI BODIES CENTROSOME CENTROSPHE
RMMCKH0D–. é£ã®ãVJã«ã¦ãå ¶å¢ã¯å¤ç¶ããã塲å«ããã°ãæ-¤ç-ã總 稱.ãã¦è®å½¢ç´°èé«è³ª(metaplasm VJ總稱ãããªãã æ ¸ã¯ä¸-ã«ç¢å¼µï¼5ååããã¦ãæ ¸æ¸(nuclear membrane) ã¯ç´°èé«è³ªVãã®å¢ããªããå ¶ä¸-ã«ã¯æ ¸è³ªããã液é«ã®æ§ 質ãä¸è¦ææ¸ãªãæ æ ¸æ¶²(nuclear sap)ããäºãµãå ¶ä¸-ã« ã¯é常ä»(nucleolus)ãããå ¶æ ¸ãæããè²ç´ ã«ã¦ããæ ã¾ããæ ¸ä»(karyosome)VJåããç´°èé«è³ªãæããè²ç´ ã«ã¦æã¾ããç´°è質ä»(plasmosome)VJå¼ã¶ãå ¶ä»åè£ã® èµ·ããVJãããããåçµï¼5ããVJãã«ã¯æ ¸ã®ä¸-ã«æè²é« ã¯ã-ä¹>s Iã ãCI;lrotnosomeãã|gãå¾ã¹.ão 以ä¸ã¯ç´°èã®æ§é ã®æ§ªç¥ãªãããå ¶è°·é¨åã®å§ç´°ã«è³ ã¦ã¯æ¼¸æ¬¡é ãåã¡ã¦èªªæãã-ãã ç« ã«è®ãã¦ãå ¶å¤ã®ãã®ã¯æ(aster)ãªããå ¶ãã¯æç· ã¡ã¹ãã²ã«ã
RM2AKJANB–Collected papers . Cliilomastix gallinarum, showing the four free flagella,blepharoplast, well-developed phaiynx, and nucleus. Abbreviations.—Ax. Axostyle. BJ. Blepharoplast. h.g. Basalgranules. Chr. B. Chromatic blocks. Chr. L. Chromatic line. Cyt.Cytostome. F. Free flagelhun. Ka. Karyosome. M.F. Membraneflagellum. Nu. Nucleus. Ph. Pharynx. ; 1 In this the first part of oiu- paper we only deal with the morphologyof the flagellate parasites we have found. In the second part we givean account of the other aninral parasites and of the results obtainedfrom new infections. FURTHER OBSERVATIONS OX
RMPFK86B–. Cytology, with special reference to the metazoan nucleus. Cells; Cytology. 204 CYTOLOGY chap. two different phases of the Ufe cycle of Coccidiitm schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or
RM2AGDNCM–. The American journal of anatomy. he Histology and Histogenesis of the Heart Muscle Cell. Anat. Anz., Jena, 1897, Bd. XIII, S. 609-620. 98.—On the Histogenesis of the Striated Muscle Fiber and the Growth of the Human Sartorius Muscle. Johns Hopkins Hosp. Bull., Balto.,1898, Vol. IX, pp. 208-215.Ranvier, 89.—Traite technique dhistologie. Paris, 1889. EXPLANATION OF FIGURES 1 TO 17.Abbreviations Used. a = Heavily staining deposits at the nodal points of cyto-reticulum of earlyembryonic cells. b = Karyosome masses. c = Transverse threads of cyto-reticulum. d = Nucleus. &Z^ Lightly staining bands
RMPFK85R–. Cytology, with special reference to the metazoan nucleus. Cells. 204 CYTOLOGY CHAP. two different phases of the Ufe cycle of Coccidium schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or takes the p
RM2AKJ82K–Collected papers . ; andfigs. 27-31, 40-42 from owl 23. (Figs. 14-31 are from preparations stained by Giemsa.) Figs. 14 and 15.—Small spindles. Fig. 16.—Small spindle, just commencing division; there are twokinetonuclei, and apparently the karyosome in the trophonucleus hasalso divided. Figs. 17-19.—Intermediate stages in the growth of the medium-sizedslender type. Figs. 20 and 21.—Fully developed medium-sized forms. Figs. 22 and 24.—Massive blue forms. Fig. 23.—Small individual of the same type. Figs. 25, 26, and 28.—Stout spindles. Fig. 27.—Transitional form from small fusiform type to stout
RMRHK4NF–. The biology of the Protozoa. Protozoa; Protozoa. 60 BIOLOGY OF THE PROTOZOA structures. After treatment with beef broth the body of Dileptus is enormously distended due to the swelhng of these cytoendosomes (Fig. 24). The centrally placed intranuclear body is generally described under the name karyosome, a term which has been so widely used by students of the Protozoa and for so many obviously different structures that it is practically synonymous with endosome or Binnenkorper. Thus Minchin describes it as a combination of chro- matin and plastin; Doflein defines a karyosome as a centrally p
![. ProtozooÌlogy. Protozoa; Protozoa, Pathogenic. FERTILIZATION BY AUTOGAMY 141 nuclei, but of masses of idiochromidia which in other protozoa become differentiated into such nuclei. The karyosome and some of the peripheral chromatin form a degenerating "somatic" nucleus which takes no part in the later processes. The further fate of the encysted form thus brought about has not been followed, Ijut in Entameba histolytica, according to the observa- tions of Schaudinn and, later, of Craig ('OS), such a stage is followed by spore formation. Schaudinn ('03) observed, and his observations Stock Photo](https://c8.alamy.com/comp/RDXBJH/protozoology-protozoa-protozoa-pathogenic-fertilization-by-autogamy-141-nuclei-but-of-masses-of-idiochromidia-which-in-other-protozoa-become-differentiated-into-such-nuclei-the-karyosome-and-some-of-the-peripheral-chromatin-form-a-degenerating-quotsomaticquot-nucleus-which-takes-no-part-in-the-later-processes-the-further-fate-of-the-encysted-form-thus-brought-about-has-not-been-followed-ijut-in-entameba-histolytica-according-to-the-observa-tions-of-schaudinn-and-later-of-craig-os-such-a-stage-is-followed-by-spore-formation-schaudinn-03-observed-and-his-observations-RDXBJH.jpg ". ProtozooÌlogy. Protozoa; Protozoa, Pathogenic. FERTILIZATION BY AUTOGAMY 141 nuclei, but of masses of idiochromidia which in other protozoa become differentiated into such nuclei. The karyosome and some of the peripheral chromatin form a degenerating "somatic" nucleus which takes no part in the later processes. The further fate of the encysted form thus brought about has not been followed, Ijut in Entameba histolytica, according to the observa- tions of Schaudinn and, later, of Craig ('OS), such a stage is followed by spore formation. Schaudinn ('03) observed, and his observations Stock Photo")
RMRDXBJH–. ProtozooÌlogy. Protozoa; Protozoa, Pathogenic. FERTILIZATION BY AUTOGAMY 141 nuclei, but of masses of idiochromidia which in other protozoa become differentiated into such nuclei. The karyosome and some of the peripheral chromatin form a degenerating "somatic" nucleus which takes no part in the later processes. The further fate of the encysted form thus brought about has not been followed, Ijut in Entameba histolytica, according to the observa- tions of Schaudinn and, later, of Craig ('OS), such a stage is followed by spore formation. Schaudinn ('03) observed, and his observations
RMRE08N3–. The Protozoa. Protozoa. SPECIAL MORPHOLOGY OF THE PROTOZOAN NUCLEUS 255 condenses, there is left a small bud, usually attached by a short peduncle, and this bud, which Siedlecki calls the secondary karyosome, seems to be the seat of the subsequent changes in the disruption of the nucleus. The secondary karyosome enlarges as though a certain amount of chromatin had reached it through the peduncle. When it has reached the volume of the first karyosome, it is also similar in structure. A third karyosome is then formed in the same way, and so on until in some cases more than twenty have been dev
RMRD2B0N–. Cytology, with special reference to the metazoan nucleus. Cells. 204 CYTOLOGY CHAP. two different phases of the life cycle of Coccidiam schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or takes the
![. Biologisches Zentralblatt. Biology. searching for them, I was able to find cysts (/«) which showed the formation of the „second reduction nuclei". In all these stages the somatic nucleus is still present. It usually has an annular appearance, with a large peripheral karyosome. It is interesting to compare this with the „somatic nucleus" in Bodo. During these stages Prowazek describes this as the . . „alten Kern, der blass und chrornatinarm ist und nur ein weitmaschiges achromatisches Gerüstwerk, dem seitlich der oft zerfallene Innenkörper anliegt, besitzt ..." And further he i Stock Photo](https://c8.alamy.com/comp/RHKAC7/biologisches-zentralblatt-biology-searching-for-them-i-was-able-to-find-cysts-which-showed-the-formation-of-the-second-reduction-nucleiquot-in-all-these-stages-the-somatic-nucleus-is-still-present-it-usually-has-an-annular-appearance-with-a-large-peripheral-karyosome-it-is-interesting-to-compare-this-with-the-somatic-nucleusquot-in-bodo-during-these-stages-prowazek-describes-this-as-the-alten-kern-der-blass-und-chrornatinarm-ist-und-nur-ein-weitmaschiges-achromatisches-gerstwerk-dem-seitlich-der-oft-zerfallene-innenkrper-anliegt-besitzt-quot-and-further-he-i-RHKAC7.jpg ". Biologisches Zentralblatt. Biology. searching for them, I was able to find cysts (/«) which showed the formation of the „second reduction nuclei". In all these stages the somatic nucleus is still present. It usually has an annular appearance, with a large peripheral karyosome. It is interesting to compare this with the „somatic nucleus" in Bodo. During these stages Prowazek describes this as the . . „alten Kern, der blass und chrornatinarm ist und nur ein weitmaschiges achromatisches Gerüstwerk, dem seitlich der oft zerfallene Innenkörper anliegt, besitzt ..." And further he i Stock Photo")
RMRHKAC7–. Biologisches Zentralblatt. Biology. searching for them, I was able to find cysts (/«) which showed the formation of the „second reduction nuclei". In all these stages the somatic nucleus is still present. It usually has an annular appearance, with a large peripheral karyosome. It is interesting to compare this with the „somatic nucleus" in Bodo. During these stages Prowazek describes this as the . . „alten Kern, der blass und chrornatinarm ist und nur ein weitmaschiges achromatisches Gerüstwerk, dem seitlich der oft zerfallene Innenkörper anliegt, besitzt ..." And further he i
RMRMGXAP–. Annals of tropical medicine and parasitology. Parasites. 252 film for at least thirty minutes, and to regulate the amount of washing afterwards by frequent microscopic examinations. It was found that the Giemsa method showed up the flagellar attachments better than the Leishman method did, whereas the latter demonstrated the nuclear karyosome better. (Plate XVIII, figs. 12 and 14.) V. MORPHOLOGY This protozoon is a typical specimen of the genus Prowazekia (Hartmann and Chagas, 1910), formerly included in the genus Bodo. It possesses two fiagella (an anterior and a lateral), and two nuclei (a
RMRD2X27–. Cytology, with special reference to the metazoan nucleus. Cells; Cytology. 204 CYTOLOGY chap. two different phases of the Ufe cycle of Coccidiitm schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or
![. The Protozoa. Protozoa. 264 THE PROTOZOA although two classical objects, Actinosphcerium and Englypha, have been repeatedly examined. Nuclear division in the former was first described by Gruber ('83), then by Hertwig ('84), by Brauer ('94), and, finally, reexamined in great detail by Hertwig ('98). All agree as to the general features of division, but disagree widely in details. In some stages (before the " primary mitosis," Hertwig) the chromatin is in a single large karyosome which incloses a faintly staining achromatic mass (Gruber, Hertwig). In addition to these there is. Plea Stock Photo](https://c8.alamy.com/comp/RE08KH/the-protozoa-protozoa-264-the-protozoa-although-two-classical-objects-actinosphcerium-and-englypha-have-been-repeatedly-examined-nuclear-division-in-the-former-was-first-described-by-gruber-83-then-by-hertwig-84-by-brauer-94-and-finally-reexamined-in-great-detail-by-hertwig-98-all-agree-as-to-the-general-features-of-division-but-disagree-widely-in-details-in-some-stages-before-the-quot-primary-mitosisquot-hertwig-the-chromatin-is-in-a-single-large-karyosome-which-incloses-a-faintly-staining-achromatic-mass-gruber-hertwig-in-addition-to-these-there-is-plea-RE08KH.jpg ". The Protozoa. Protozoa. 264 THE PROTOZOA although two classical objects, Actinosphcerium and Englypha, have been repeatedly examined. Nuclear division in the former was first described by Gruber ('83), then by Hertwig ('84), by Brauer ('94), and, finally, reexamined in great detail by Hertwig ('98). All agree as to the general features of division, but disagree widely in details. In some stages (before the " primary mitosis," Hertwig) the chromatin is in a single large karyosome which incloses a faintly staining achromatic mass (Gruber, Hertwig). In addition to these there is. Plea Stock Photo")
RMRE08KH–. The Protozoa. Protozoa. 264 THE PROTOZOA although two classical objects, Actinosphcerium and Englypha, have been repeatedly examined. Nuclear division in the former was first described by Gruber ('83), then by Hertwig ('84), by Brauer ('94), and, finally, reexamined in great detail by Hertwig ('98). All agree as to the general features of division, but disagree widely in details. In some stages (before the " primary mitosis," Hertwig) the chromatin is in a single large karyosome which incloses a faintly staining achromatic mass (Gruber, Hertwig). In addition to these there is. Plea
RMRHK4N2–. The biology of the Protozoa. Protozoa; Protozoa. NUCLEI AND KINETIC ELEMENTS 61 practical value is concerned the term karyosome is no more useful than the non-committal term Binnenkorper or Minchin's equivalent term endosome. I would advocate, therefore, discarding altogether. Fig. 24:.—Dileptus anser: A, vegetative individual in culture with nucleus in the form of scattered chromatin granules; B, individual showing the effect of treatment with beef extract on the chromatin granules. (Original.) the term karyosome which seemingly bears the earmarks of some- thing definite in the cell, using
![. Annales de la Société royale zoologique et malacologique de Belgique. Zoology; Mollusks. Fig. 200. — Monocystis X 790, page 14. — ep — Épispore. — en = Endospore. — hy — Karyosome.. Fig. 207. —Monocystis X 1180, page 164 Spores conjuguées.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Société royale zoologique et malacologique de Belgique. [S. l. : s. n. ] Stock Photo](https://c8.alamy.com/comp/RN0T69/annales-de-la-socit-royale-zoologique-et-malacologique-de-belgique-zoology-mollusks-fig-200-monocystis-x-790-page-14-ep-pispore-en-=-endospore-hy-karyosome-fig-207-monocystis-x-1180-page-164-spores-conjugues-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-and-appearance-of-these-illustrations-may-not-perfectly-resemble-the-original-work-socit-royale-zoologique-et-malacologique-de-belgique-s-l-s-n-RN0T69.jpg ". Annales de la Société royale zoologique et malacologique de Belgique. Zoology; Mollusks. Fig. 200. — Monocystis X 790, page 14. — ep — Épispore. — en = Endospore. — hy — Karyosome.. Fig. 207. —Monocystis X 1180, page 164 Spores conjuguées.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Société royale zoologique et malacologique de Belgique. [S. l. : s. n. ] Stock Photo")
RMRN0T69–. Annales de la Société royale zoologique et malacologique de Belgique. Zoology; Mollusks. Fig. 200. — Monocystis X 790, page 14. — ep — Épispore. — en = Endospore. — hy — Karyosome.. Fig. 207. —Monocystis X 1180, page 164 Spores conjuguées.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Société royale zoologique et malacologique de Belgique. [S. l. : s. n. ]
RMRE099W–. The Protozoa. Protozoa. ^Mkrs, . â . ' .:r- W$0f/. Fig. 70. â Nuclear division in Noctiluca miliaris. A. The first changes of the chromatin from the large karyosome condition ; concentration of the substance of the divi- sion centre (s). B. Further disintegration of the chromatin and arrangement of granules to form the chromosomes {ch). C. Amphiaster and completed chromosomes. D. The central spindle in the hollow of the nucleus; the nuclear plate of chromosomes is thus wrapped around the division-centre. £. A section through the centre of the long axis of the division- centre before divisio
RMRD2X16–. Cytology, with special reference to the metazoan nucleus. Cells. 204 CYTOLOGY CHAP. two different phases of the Ufe cycle of Coccidium schubergi (Schaudinn, 1900). In the schizont (the asexual cycle), before nuclear division the chromatin granules become massed together in little clumps and irregular threads, in which, however, no definite longitudinal splitting can be made out, and they do not get collected into an equatorial plate. They sort themselves out in some way or other into two groups which appear to be pushed apart by the elongation of the karyosome, which contains, or takes the p
RMRN4PGW–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. 130 AMEB.E. Fig. 36. Endamoeba histolytica. X 1650. A, stained vegetative ameba; B, cyst with four nuclei; n., nucleus, showing peripheral chromatin granules and central karyosome; r. b. c, ingested red blood corpuscles; chr. b., chromatoid body. (After Dobell.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Chandler, As
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 344 NANCY B. KINDERMAN AND ROBERT C. KING observed rough surface of the endobody suggests that there is movement of the packets either into or out of the endobody. By S10A the surface is smooth, and packets are no longer seen in the vicinity. "We iavor the movement of packets into * £ *y.- - >. FIGURE 8. (A.) A section through a S8 oocyte which does not include the karyosome. A dense endohody u-) is seen surrounded by packets of nucleolar material. Vesicles (v) are present inside the oocyte nucleus, and nuclear pores Stock Photo](https://c8.alamy.com/comp/RHN70D/the-biological-bulletin-biology-zoology-biology-marine-biology-344-nancy-b-kinderman-and-robert-c-king-observed-rough-surface-of-the-endobody-suggests-that-there-is-movement-of-the-packets-either-into-or-out-of-the-endobody-by-s10a-the-surface-is-smooth-and-packets-are-no-longer-seen-in-the-vicinity-quotwe-iavor-the-movement-of-packets-into-y-gt-figure-8-a-a-section-through-a-s8-oocyte-which-does-not-include-the-karyosome-a-dense-endohody-u-is-seen-surrounded-by-packets-of-nucleolar-material-vesicles-v-are-present-inside-the-oocyte-nucleus-and-nuclear-pores-RHN70D.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 344 NANCY B. KINDERMAN AND ROBERT C. KING observed rough surface of the endobody suggests that there is movement of the packets either into or out of the endobody. By S10A the surface is smooth, and packets are no longer seen in the vicinity. "We iavor the movement of packets into * £ *y.- - >. FIGURE 8. (A.) A section through a S8 oocyte which does not include the karyosome. A dense endohody u-) is seen surrounded by packets of nucleolar material. Vesicles (v) are present inside the oocyte nucleus, and nuclear pores Stock Photo")
RMRHN70D–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 344 NANCY B. KINDERMAN AND ROBERT C. KING observed rough surface of the endobody suggests that there is movement of the packets either into or out of the endobody. By S10A the surface is smooth, and packets are no longer seen in the vicinity. "We iavor the movement of packets into * £ *y.- - >. FIGURE 8. (A.) A section through a S8 oocyte which does not include the karyosome. A dense endohody u-) is seen surrounded by packets of nucleolar material. Vesicles (v) are present inside the oocyte nucleus, and nuclear pores
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OOGENESIS IN DROSOPH1LA VIRILIS 341 ':'-'!i".:, nucleolar material | chromatin / . 1. Sn Sll. By S5 the chromatin has aggregated into a karyosome (k) which expands through S10B. In S5, small packets of material (depicted as heavy dots) are seen near the nucleolus, and they persist through S9. Small clumps of granules are associated with the karyosome from S6 through Sll. In S10B, vitelline bodies (vb) are deposited, and these coalesce to form a vitelline membrane (vm) by Sll. The endochorion (ec), is laid down during S1 Stock Photo](https://c8.alamy.com/comp/RHN72K/the-biological-bulletin-biology-zoology-biology-marine-biology-oogenesis-in-drosoph1la-virilis-341-!iquot-nucleolar-material-chromatin-1-sn-sll-by-s5-the-chromatin-has-aggregated-into-a-karyosome-k-which-expands-through-s10b-in-s5-small-packets-of-material-depicted-as-heavy-dots-are-seen-near-the-nucleolus-and-they-persist-through-s9-small-clumps-of-granules-are-associated-with-the-karyosome-from-s6-through-sll-in-s10b-vitelline-bodies-vb-are-deposited-and-these-coalesce-to-form-a-vitelline-membrane-vm-by-sll-the-endochorion-ec-is-laid-down-during-s1-RHN72K.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OOGENESIS IN DROSOPH1LA VIRILIS 341 ':'-'!i".:, nucleolar material | chromatin / . 1. Sn Sll. By S5 the chromatin has aggregated into a karyosome (k) which expands through S10B. In S5, small packets of material (depicted as heavy dots) are seen near the nucleolus, and they persist through S9. Small clumps of granules are associated with the karyosome from S6 through Sll. In S10B, vitelline bodies (vb) are deposited, and these coalesce to form a vitelline membrane (vm) by Sll. The endochorion (ec), is laid down during S1 Stock Photo")
RMRHN72K–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. OOGENESIS IN DROSOPH1LA VIRILIS 341 ':'-'!i".:, nucleolar material | chromatin / . 1. Sn Sll. By S5 the chromatin has aggregated into a karyosome (k) which expands through S10B. In S5, small packets of material (depicted as heavy dots) are seen near the nucleolus, and they persist through S9. Small clumps of granules are associated with the karyosome from S6 through Sll. In S10B, vitelline bodies (vb) are deposited, and these coalesce to form a vitelline membrane (vm) by Sll. The endochorion (ec), is laid down during S1
![. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric karyosome; chr. b., remnant of chromatoid body. Note large number of food vacuoles in vegetative ameba. (After Dobell.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration Stock Photo](https://c8.alamy.com/comp/RN4PFR/animal-parasites-and-human-disease-parasites-medical-parasitology-insects-as-carriers-of-disease-fig-37-endamoeba-coli-x-1650-a-stained-vegetative-ameba-b-cyst-with-eight-nuclei-n-nucleus-showing-coarse-peripheral-chromatin-granules-chromatin-granules-in-quotclear-zonequot-between-periphery-and-karyosome-and-eccentric-karyosome-chr-b-remnant-of-chromatoid-body-note-large-number-of-food-vacuoles-in-vegetative-ameba-after-dobell-please-note-that-these-images-are-extracted-from-scanned-page-images-that-may-have-been-digitally-enhanced-for-readability-coloration-RN4PFR.jpg ". Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric karyosome; chr. b., remnant of chromatoid body. Note large number of food vacuoles in vegetative ameba. (After Dobell.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration Stock Photo")
RMRN4PFR–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric karyosome; chr. b., remnant of chromatoid body. Note large number of food vacuoles in vegetative ameba. (After Dobell.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration
RMRN4PEY–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 38. Endolimax nana. X 1650. A, two stained vegetative forms, show- ing nuclei with large irregular karyosome, and numerous food vacuoles. B, cyst with four nuclei. (After Dobell.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Chandler, Asa C. (Asa Crawford), 1891-1958. New York, J. Wiley
![. The germ-cell cycle in animals . Cells. INTRODUCTION fibrillar phases, at different periods of growth and in different conditions of physiological activity," and that "apparently homogeneous protoplasm is a complex mixture of substances which may assume. Fig. 1. â Diagram of a, cell, as = attraction-sphere; c = centrosome; ch = chromatin reticulum; cr = chromidia; re ââ ectoplasm; in = cn- doplasm; A; = karyosome; Z = limn; /h = mitochondria; me = mcta- plasm; n.m = nuclear membrane; p = plastid; /)/ = plasmosome or nucleolus; s = spongioplasm; t) = vacuole. various forms of visibl Stock Photo](https://c8.alamy.com/comp/RDW696/the-germ-cell-cycle-in-animals-cells-introduction-fibrillar-phases-at-different-periods-of-growth-and-in-different-conditions-of-physiological-activityquot-and-that-quotapparently-homogeneous-protoplasm-is-a-complex-mixture-of-substances-which-may-assume-fig-1-diagram-of-a-cell-as-=-attraction-sphere-c-=-centrosome-ch-=-chromatin-reticulum-cr-=-chromidia-re-ectoplasm-in-=-cn-doplasm-a-=-karyosome-z-=-limn-h-=-mitochondria-me-=-mcta-plasm-nm-=-nuclear-membrane-p-=-plastid-=-plasmosome-or-nucleolus-s-=-spongioplasm-t-=-vacuole-various-forms-of-visibl-RDW696.jpg ". The germ-cell cycle in animals . Cells. INTRODUCTION fibrillar phases, at different periods of growth and in different conditions of physiological activity," and that "apparently homogeneous protoplasm is a complex mixture of substances which may assume. Fig. 1. â Diagram of a, cell, as = attraction-sphere; c = centrosome; ch = chromatin reticulum; cr = chromidia; re ââ ectoplasm; in = cn- doplasm; A; = karyosome; Z = limn; /h = mitochondria; me = mcta- plasm; n.m = nuclear membrane; p = plastid; /)/ = plasmosome or nucleolus; s = spongioplasm; t) = vacuole. various forms of visibl Stock Photo")
RMRDW696–. The germ-cell cycle in animals . Cells. INTRODUCTION fibrillar phases, at different periods of growth and in different conditions of physiological activity," and that "apparently homogeneous protoplasm is a complex mixture of substances which may assume. Fig. 1. â Diagram of a, cell, as = attraction-sphere; c = centrosome; ch = chromatin reticulum; cr = chromidia; re ââ ectoplasm; in = cn- doplasm; A; = karyosome; Z = limn; /h = mitochondria; me = mcta- plasm; n.m = nuclear membrane; p = plastid; /)/ = plasmosome or nucleolus; s = spongioplasm; t) = vacuole. various forms of visibl
![. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned Stock Photo](https://c8.alamy.com/comp/RN4PCY/animal-parasites-and-human-disease-parasites-medical-parasitology-insects-as-carriers-of-disease-glm-fig-39-iodamceba-butschlii-x-1650-a-stained-vegetative-ameba-showing-numerous-food-vacuoles-and-nucleus-n-the-latter-with-large-central-karyosome-and-a-single-layer-of-granules-between-karyosome-and-nuclear-membrane-b-cyst-showing-nucleus-n-with-peripheral-karyosome-and-glycogen-mass-gl-m-or-quotiodophilic-bodyquot-from-which-these-cysts-received-the-name-quotiodine-or-i-cystsquot-after-dobell-please-note-that-these-images-are-extracted-from-scanned-RN4PCY.jpg ". Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned Stock Photo")
RMRN4PCY–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned
RMRN0T6H–. Annales de la Société royale zoologique et malacologique de Belgique. Zoology; Mollusks. Fig. 204. — Monocystis magna X 37, page 164. — Les deux parasites ont encore leur revêtement de spermatozoïdes. — sf ^= Entonnoirs vibra- tiles du testicule. — •» = noyau.. Fig. 200. — Monocystis X 790, page 14. — ep — Épispore. — en = Endospore. — hy — Karyosome.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Société royale zoologi
![. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned Stock Photo](https://c8.alamy.com/comp/RN4PDN/animal-parasites-and-human-disease-parasites-medical-parasitology-insects-as-carriers-of-disease-glm-fig-39-iodamceba-butschlii-x-1650-a-stained-vegetative-ameba-showing-numerous-food-vacuoles-and-nucleus-n-the-latter-with-large-central-karyosome-and-a-single-layer-of-granules-between-karyosome-and-nuclear-membrane-b-cyst-showing-nucleus-n-with-peripheral-karyosome-and-glycogen-mass-gl-m-or-quotiodophilic-bodyquot-from-which-these-cysts-received-the-name-quotiodine-or-i-cystsquot-after-dobell-please-note-that-these-images-are-extracted-from-scanned-RN4PDN.jpg ". Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned Stock Photo")
RMRN4PDN–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. gl.m. Fig. 39. Iodamceba b'utschlii. X 1650. A, stained vegetative ameba, showing numerous food vacuoles and nucleus (n.), the latter with large central karyosome and a single layer of granules between karyosome and nuclear membrane. B, cyst, showing nucleus (n.) with peripheral karyosome, and glycogen mass (gl. m.) or "iodophilic body," from which these cysts received the name "Iodine or I. cysts." (After Dobell.). Please note that these images are extracted from scanned
RMRHRA4N–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. THE RELATION BETWEEN AMITOSIS AND MITOSIS. 113 nucleus or cytoplasm. No spireme has been observed but a number of deeply staining granules appear in the nucleus in ad- dition to the karyosome. The yolk appears first in the form of small granules which increase in size and fuse, until the cell con- tains a single large spherical mass of yolk and the greatly reduced nucleus is flattened at one side. Successive stages of yolk-de- velopment are shown in Figs. 31-35. These cells apparently. FIGS. 29-35. arise from the same primor
RMRN4PBE–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 40. Dientamoeba fragilis. X 1650. A, stained vegetative ameba. show- ing two nuclei with granular karyosomes, and lood vacuoles; B, living ameba, showing leaf-like pseudopodia. (A, after. Dobell; B, after Jepps and Dobcll.). Fig. 41. Councilmania lafleuri. X 1650. A, stained vegetative ameba with a pseudopodium in early phase of protrusion and one nearly retracted and filled with endoplasm; nucleus showing peripheral chromatin and large irregular, ec- centric karyosome; endoplasm filled
![. Biologisches Zentralblatt. Biology. 548 Swarczewsky, Zur Chromidienfrage und Kerndualismushypothese. Nimmt man an, dass die Dimensionen aller dieser Tochterkerne sich schließlich ausgleichen, was durch weitere Teilungen der größeren Kerne zustande kommen kann, so wird man natürlich voraussetzen müssen, dass die Zahl der kleinen Kerne eine sehr große sein wird. Einen jeden der so gebildeten Kerne (oder richtiger Karyosome) halten sowohl Jollos wie auch Hartmann für „totipotent", d. h. wie man annehmen muss, für völhg ausgebildete Kerne, welche im- stande sind, alle dem Kerne zukommenden Stock Photo](https://c8.alamy.com/comp/RHKDF9/biologisches-zentralblatt-biology-548-swarczewsky-zur-chromidienfrage-und-kerndualismushypothese-nimmt-man-an-dass-die-dimensionen-aller-dieser-tochterkerne-sich-schlielich-ausgleichen-was-durch-weitere-teilungen-der-greren-kerne-zustande-kommen-kann-so-wird-man-natrlich-voraussetzen-mssen-dass-die-zahl-der-kleinen-kerne-eine-sehr-groe-sein-wird-einen-jeden-der-so-gebildeten-kerne-oder-richtiger-karyosome-halten-sowohl-jollos-wie-auch-hartmann-fr-totipotentquot-d-h-wie-man-annehmen-muss-fr-vlhg-ausgebildete-kerne-welche-im-stande-sind-alle-dem-kerne-zukommenden-RHKDF9.jpg ". Biologisches Zentralblatt. Biology. 548 Swarczewsky, Zur Chromidienfrage und Kerndualismushypothese. Nimmt man an, dass die Dimensionen aller dieser Tochterkerne sich schließlich ausgleichen, was durch weitere Teilungen der größeren Kerne zustande kommen kann, so wird man natürlich voraussetzen müssen, dass die Zahl der kleinen Kerne eine sehr große sein wird. Einen jeden der so gebildeten Kerne (oder richtiger Karyosome) halten sowohl Jollos wie auch Hartmann für „totipotent", d. h. wie man annehmen muss, für völhg ausgebildete Kerne, welche im- stande sind, alle dem Kerne zukommenden Stock Photo")
RMRHKDF9–. Biologisches Zentralblatt. Biology. 548 Swarczewsky, Zur Chromidienfrage und Kerndualismushypothese. Nimmt man an, dass die Dimensionen aller dieser Tochterkerne sich schließlich ausgleichen, was durch weitere Teilungen der größeren Kerne zustande kommen kann, so wird man natürlich voraussetzen müssen, dass die Zahl der kleinen Kerne eine sehr große sein wird. Einen jeden der so gebildeten Kerne (oder richtiger Karyosome) halten sowohl Jollos wie auch Hartmann für „totipotent", d. h. wie man annehmen muss, für völhg ausgebildete Kerne, welche im- stande sind, alle dem Kerne zukommenden
![. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 36. Endamoeba histolytica. X 1650. A, stained vegetative ameba; B, cyst with four nuclei; n., nucleus, showing peripheral chromatin granules and central karyosome; r. b. c, ingested red blood corpuscles; chr. b., chromatoid body. (After Dobell.). Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric kary Stock Photo](https://c8.alamy.com/comp/RN4PG5/animal-parasites-and-human-disease-parasites-medical-parasitology-insects-as-carriers-of-disease-fig-36-endamoeba-histolytica-x-1650-a-stained-vegetative-ameba-b-cyst-with-four-nuclei-n-nucleus-showing-peripheral-chromatin-granules-and-central-karyosome-r-b-c-ingested-red-blood-corpuscles-chr-b-chromatoid-body-after-dobell-fig-37-endamoeba-coli-x-1650-a-stained-vegetative-ameba-b-cyst-with-eight-nuclei-n-nucleus-showing-coarse-peripheral-chromatin-granules-chromatin-granules-in-quotclear-zonequot-between-periphery-and-karyosome-and-eccentric-kary-RN4PG5.jpg ". Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 36. Endamoeba histolytica. X 1650. A, stained vegetative ameba; B, cyst with four nuclei; n., nucleus, showing peripheral chromatin granules and central karyosome; r. b. c, ingested red blood corpuscles; chr. b., chromatoid body. (After Dobell.). Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric kary Stock Photo")
RMRN4PG5–. Animal parasites and human disease. Parasites; Medical parasitology; Insects as carriers of disease. Fig. 36. Endamoeba histolytica. X 1650. A, stained vegetative ameba; B, cyst with four nuclei; n., nucleus, showing peripheral chromatin granules and central karyosome; r. b. c, ingested red blood corpuscles; chr. b., chromatoid body. (After Dobell.). Fig. 37. Endamoeba coli. X 1650. A, stained vegetative ameba; B, cyst, with eight nuclei; n., nucleus, showing coarse peripheral chromatin granules, chromatin granules in "clear zone" between periphery and karyosome, and eccentric kary
RMRN0ED9–. Annales de l'Institut Pasteur. Science; Allergy and Immunology; Medicine; Microbiology. 810 ANNALES DE L'INSTITUT PASTEUR. retire de plus en plus à la périphérie (fig. B) ; l'amas, à structure plus dense, prend une forme très régulière, celle d'un triangle appuyé par sa base contre la membrane nucléaire et dont le sommet touche la membrane du karyosome (fig. B).. A.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.. Institu
![. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ' • CHAMBER VOLUME ' OOCYTE VOLUME POSTERIOR NUCLEI NURSE CELL NUCLEAR VOLUME B . ANTERIOR / ° 0 OOCYTE NUCLEAR "• O • VOLUME O. odo HALO VOLUME KARYOSOME o VOLUME O, OOCYTE NUCLEOLAR VOLUME 3Z STAGE |9|ia4lOB|ll|H|l3 FIGURE 7. The volumes of various ovarian structures as a function of developmental stage; B, breakdown of nuclear envelope; C, condensation of karyosomes into individual bivalents; D, degeneration of nurse cell nuclei; F, fragmentation of the oocyte halo and nucleolus. Inset : the pattern of interconnecte Stock Photo](https://c8.alamy.com/comp/RHN713/the-biological-bulletin-biology-zoology-biology-marine-biology-chamber-volume-oocyte-volume-posterior-nuclei-nurse-cell-nuclear-volume-b-anterior-0-oocyte-nuclear-quot-o-volume-o-odo-halo-volume-karyosome-o-volume-o-oocyte-nucleolar-volume-3z-stage-9ia4lobllhl3-figure-7-the-volumes-of-various-ovarian-structures-as-a-function-of-developmental-stage-b-breakdown-of-nuclear-envelope-c-condensation-of-karyosomes-into-individual-bivalents-d-degeneration-of-nurse-cell-nuclei-f-fragmentation-of-the-oocyte-halo-and-nucleolus-inset-the-pattern-of-interconnecte-RHN713.jpg ". The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ' • CHAMBER VOLUME ' OOCYTE VOLUME POSTERIOR NUCLEI NURSE CELL NUCLEAR VOLUME B . ANTERIOR / ° 0 OOCYTE NUCLEAR "• O • VOLUME O. odo HALO VOLUME KARYOSOME o VOLUME O, OOCYTE NUCLEOLAR VOLUME 3Z STAGE |9|ia4lOB|ll|H|l3 FIGURE 7. The volumes of various ovarian structures as a function of developmental stage; B, breakdown of nuclear envelope; C, condensation of karyosomes into individual bivalents; D, degeneration of nurse cell nuclei; F, fragmentation of the oocyte halo and nucleolus. Inset : the pattern of interconnecte Stock Photo")
RMRHN713–. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. ' • CHAMBER VOLUME ' OOCYTE VOLUME POSTERIOR NUCLEI NURSE CELL NUCLEAR VOLUME B . ANTERIOR / ° 0 OOCYTE NUCLEAR "• O • VOLUME O. odo HALO VOLUME KARYOSOME o VOLUME O, OOCYTE NUCLEOLAR VOLUME 3Z STAGE |9|ia4lOB|ll|H|l3 FIGURE 7. The volumes of various ovarian structures as a function of developmental stage; B, breakdown of nuclear envelope; C, condensation of karyosomes into individual bivalents; D, degeneration of nurse cell nuclei; F, fragmentation of the oocyte halo and nucleolus. Inset : the pattern of interconnecte
![. The Protozoa. Protozoa. ^KL E Fig. 134. — Types of nuclei. [A. Calcituba polymorpha Roboz, from SCHAUDINN. B. Colptdium colpoda, from a preparation. C. Euglena vlridis Ehr. irom a preparation. D. letramiius ctulomo- nas, n. sp. E. Noctiluca miliaris Sur., from a preparation.] A single karyosome (A) becomes vesicular, and ultimately gives rise to several daughter-karyo- somes (so-called "fragmentation" Schaudinn). Several karyosomes in Noctduca (E) hold the chromatin, the rest of the nucleus is filled with "achromatic " granules. In Tetramitus chilomonas (D) the chromatin Stock Photo](https://c8.alamy.com/comp/RE08N6/the-protozoa-protozoa-kl-e-fig-134-types-of-nuclei-a-calcituba-polymorpha-roboz-from-schaudinn-b-colptdium-colpoda-from-a-preparation-c-euglena-vlridis-ehr-irom-a-preparation-d-letramiius-ctulomo-nas-n-sp-e-noctiluca-miliaris-sur-from-a-preparation-a-single-karyosome-a-becomes-vesicular-and-ultimately-gives-rise-to-several-daughter-karyo-somes-so-called-quotfragmentationquot-schaudinn-several-karyosomes-in-noctduca-e-hold-the-chromatin-the-rest-of-the-nucleus-is-filled-with-quotachromatic-quot-granules-in-tetramitus-chilomonas-d-the-chromatin-RE08N6.jpg ". The Protozoa. Protozoa. ^KL E Fig. 134. — Types of nuclei. [A. Calcituba polymorpha Roboz, from SCHAUDINN. B. Colptdium colpoda, from a preparation. C. Euglena vlridis Ehr. irom a preparation. D. letramiius ctulomo- nas, n. sp. E. Noctiluca miliaris Sur., from a preparation.] A single karyosome (A) becomes vesicular, and ultimately gives rise to several daughter-karyo- somes (so-called "fragmentation" Schaudinn). Several karyosomes in Noctduca (E) hold the chromatin, the rest of the nucleus is filled with "achromatic " granules. In Tetramitus chilomonas (D) the chromatin Stock Photo")
RMRE08N6–. The Protozoa. Protozoa. ^KL E Fig. 134. — Types of nuclei. [A. Calcituba polymorpha Roboz, from SCHAUDINN. B. Colptdium colpoda, from a preparation. C. Euglena vlridis Ehr. irom a preparation. D. letramiius ctulomo- nas, n. sp. E. Noctiluca miliaris Sur., from a preparation.] A single karyosome (A) becomes vesicular, and ultimately gives rise to several daughter-karyo- somes (so-called "fragmentation" Schaudinn). Several karyosomes in Noctduca (E) hold the chromatin, the rest of the nucleus is filled with "achromatic " granules. In Tetramitus chilomonas (D) the chromatin
RMRHKDEE–. Biologisches Zentralblatt. Biology. (S(i Hartmann, Polyenergide Kerne. Karyosome (Sekundärkerne) sich mit aller Deutlichkeit aus ihrem morphologischen Bau ergibt. Der Hinweis auf die oben genauer geschilderten Vorgänge bei Adelea genügt wohl, um zu begreifen, dass es sich bei der Zerfallteilung, wie bei der fortgesetzten Kern- knospung einfach um das Freiwerden aller resp. einzelner vor- gebildeter, totipotenter Sekundärkerne aus dem polyenergiden Pri- märkern (Polykaryon) handelt. Besonders erwähnen möchte ich noch die Bildung derGameten- kerne bei WagnereUa, weil der Vorgang große Ähnlichk
RMRHKA05–. Biologisches Zentralblatt. Biology. a) Flagellat von Para- moeha. Blepharoplast mit geteilten Zen- Kern und Zellkern der P.aramoeba in Chardi-Zentriolen triolen. geteilt. b) Kern von Flagellaten mitgeteiltem Zentriol. Fig. 5. •;C^i V «i^r.; Kern und dessen Teilung bei einer Süßwasser-J.moe&o. Die granulären Differenzierungen der Zellen, wie die Centriolen der Karyosome, die als zweite Kerne aufzufassen sind, die Centriolen der Zentralkörper der Heliozoen (Acanthocystis), viele Blepharoplast- centriolen und Basalkörperchen sind geteilt und befinden sich meistens dauernd auf den Diplosom
RMRE9WRB–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. 198 EDMOND HESSE DiAGNOSE. â Monocystidée toujours en association de deux individus. Couples ovoïdes, presque sphériques. Pas de stries épicytaires visibles ; corps couvert de poils larges et allongés. Cytoplasme creusé d^alvéoles très inégales. Grains de paramy- lon sphériques. Noyau sphérique peu volumineux, avec un gros karyosome. Sporocystes typiques des Monocystis. HÃTE : Helodrilus longus Ude. Z. pilosa n'est pas aussi commune que Z. cometa ; je n'ai rencontré ce parasite que dans quelques exemplaires
RMRECT35–. comptesrendusheb1321901acad. es naturelles. ( 1434 ) final ou adulte représenté par un corps sphérique, volumineux, fortement pigmenté (7), qui précède lui-même la formation du sporocyste. ^. Stade grégariniforme de l'hématozoaire du paludisme. La ligne pointillée indique la circonférence des globules sanguins; n, noyau; k, karyosome: cyt, cytoplasma; pm, pigment mélanique. (Objectif à immersion ,', et oculaire compensateur n° 12 Stiassnie.) Coloration par la méthode de M. Laveran (bleu Borrel, éosine, tannin). » Il constitue la forme la plus constante et la plus fréquente d
RMREA6F1–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. 48 EDMOND HESSE l'instant de séparer les deux espèces bien qu'elles habitent des hôtes différents. DiAGNOSE. â Monocystidée fusiforme mesurant 180 u. de long sur 50 y. d'épaisseur. Extrémité antérieure pourvue d'un mucron conique ou renflée en houle ; extrémité postérieure pointue ; Epicyte à stries longitudinales parfois assez accentuées. Myocyte 'pi'ésentant des fibrilles longitudiimles très fines. Endoplasme dense, finement granuleux. Noyau arrondi ou prismatique, ren- fermant un karyosome sphérique
RMREA6E3–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. MONOCYSTIDÃES DES OLIGOCHÃTES 55. Fio. XVI. M. Michaelseni x 500. Le noyau sphérique présente une membrane chromatique et renferme un gros karyosome vacuolaire central, sphérique également. Le reste du noyau est occupé par le réticulum lininien dont les mailles sont remplies de fines granulations achroma- tiques. Le réseau supporte des grains chromatiques assez nombreux petits et irréguliers vers le centre, plus volumineux et sphé- riques au voisinage de la membrane (fig. xvi). J'ai observé chez cette espèce
RMRMWB9D–. Annales des sciences naturelles. Plants; Biology. LES CHAMPIGNO.NS DITS AMBROSIA 57 avec régression au glyrennàthermlschung, montrent les corpus- cules métachromatiques souvent groupés dans de grandes vacuoles, et, dans les cellules levures, dans de petites vacuoles situées aux deux pôles (PI. V, fig. 1). Des fdaments fixés au formol ou au picroformol et colorés par la méthode de Ileidenhain (hématoxyline au fer) ont montré qu'il y avait plusieurs noyaux dans chaciue cellule (fig. 8). Ces noyaux comportent un karyosome fortement coloré entouré d'une zone Fig. 8. — Filament de Cliampignon pro
RMREA6DY–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. Fio. XVI. M. Michaelseni x 500. Le noyau sphérique présente une membrane chromatique et renferme un gros karyosome vacuolaire central, sphérique également. Le reste du noyau est occupé par le réticulum lininien dont les mailles sont remplies de fines granulations achroma- tiques. Le réseau supporte des grains chromatiques assez nombreux petits et irréguliers vers le centre, plus volumineux et sphé- riques au voisinage de la membrane (fig. xvi). J'ai observé chez cette espèce des enkystements so- litaires qui
RMREA6EG–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. Fia. XIV. M. Bretscheri. Forme libre du cÅlome x 1200. FlG. XV. M. Bretscheri. Forme du parasite englobé dans les cellules chloragogènes x 500. L'endoplasme finement granuleux est dense, creusé de très petites alvéoles régulières renfermant des grains de paramylon sphériques, de taille remarquablement uniforme. On y voit souvent des masses chromatoïdes de volume et de forme variables. Il y a un gros noyau sphérique qui renferme un karyosome central à moelle vacuolaire et dont la couche externe seule se teint p
RMRE9WXR–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. 114 EI3M0ND HESSE que les granulations cytoplasmiques. Il renferme un gros karyo- some également sphérique, central ou légèrement excentrique, creusé de vacuoles et présentant à sa surface une croûte plus colorée. Ce karyosome est entouré d'une zone circulaire claire produite peut-être par l'action des agents fixateurs et dans laquelle on aperçoit un grand nombre de petits filaments rayonnants paraissant s'attacher au karyosome et divergeant dans le noyau (fig. xlvi). Ce sont les filaments du réseau de linin
RMRED1GE–. Comptes rendus des séances de la Société de biologie et de ses filiales. Biology. ({)2) SÃANCE DU () JUIN 1029 soïdales, mêlées en inajorilé aux formes bourgeonnanlcp. Après fixa- tion (fig. i2), le cytoplasme apparaît comme un lâche réliciilum, assez fortement obscurci par l'acide osmique; ses inclusions disparaissent, ou persistent au contraire, tantôt simplement grisées, tantôt d'un noir opaque, attestant une constitution graisseuse. Quant aux noyaux, au lieu de se présenter comme ceux des scliizontes, avec leur chromatine con- densée en un seul karyosome central, ils sont
RMRN0EAX–. Annales de l'Institut Pasteur. Science; Allergy and Immunology; Medicine; Microbiology. C.. B. La cellule s'accroissant de plus en plus, son noyau grandit, devient ovale ; le réseau de chromatine est presque exclusive- ment à la périphérie du noyau, et la communication entre l'amas polaire et le karyosome ne se fait plus que par un pédoncule mince et allongé. (Fig. C.) Enfin, quand le noyau atteint presque son état adulte, le contact entre l'amas et la membrane nucléaire cesse ; on a une petite boule de chromatine très condensée reliée au karyosome par un mince pédoncule (lig. D) ; c'est le
RMRE9WXY–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. 110 EDMOND HESSE Monocystis villosa n. sp. Une autre Grégarine arrondie et velue, voisine de M. lumbrici olidi Schmidt, mais s'en éloignant par quelques caractères se rencontre chez Octolasium lacteum Ãrley, nous l'appellerons M. villosa. DiAGNOSE. â Monocystidée arrondie, de 200 à 250 ^ de dia- mètre, couverte de poils fins, serrés, souvent très longs. Sarcocyte mince. Entocyte à grains de paramylon volumineux. Noyau sphérique à 1 seul karyosome. HÃTE : Octolasium lacteum Orley. i Cette Grégarine est assez com
RMRECXEN–. Comptes rendus hebdomadaires des séances de l'Académie des sciences. Science -- Societies, etc; Science; Science. SÃANCE DU ') MAI 1909. Il/i3 mités est en général plus effilée que l'autre (fig- 1). L'extrémité effilée est souvent repliée comme l'indique la figure 3. La longueur des éléments, si l'on tient compte du repliement, toujours partiel, peut atteindre 17!^ à 18!^. Vers la partie moyenne du corps du parasite, on distingue un karyosome de forme ovalaire qui se colore facilement par le Giemsa. Le protoplasme ne contient d'ordi- naire qu'un petit nombre de granulations chrom
RMREA6D7–. Contribution a l'etude des monocystidées des Oligochètes. Oligochaeta. 76 EDMOND HESSE de masses irrégulières très volumineuses et qui rappellent beaucoup l'aspect du karyosome, elles ont été vues déjà par Drzewecki (1903), nous en reparlerons ultérieurement. D'au- tres plus petites proviennent peut-être de l'cmiettement des précédentes, ce sont des grains sphériques ou irréguliers, des bâtonnets, des anneaux qui restent isolés ou se rassemblent en figures régulières. Les chromidies qui apparaissent au moment où les grains de paramylon sont en voie de résorption sont de d
![. Comptes rendus des sances de la Socit de biologie et de ses filiales. (33) SÃANCE IU" 19 JUIN il égales. L'extrémité arrondie-ovalaire, qu'on peut appeler antérieure, avec le noyau et le karyosome. occupe un des pôles ; la partie postérieure, plus ou moins effilée, constituée parle protoplasme avec quelques grains très noirs de pigment mélanique, aboutit au pôle opposé (fig. 3 et 4). C'est à ce moment que l'incurvation se produit. Elle n'est jamais très accentuée, mais se distingue néanmoins très nettement (fig. o, 6, 7, 8, 9). L'analogie avec les formes hémogrégarinie Stock Photo](https://c8.alamy.com/comp/RED77P/comptes-rendus-des-sances-de-la-socit-de-biologie-et-de-ses-filiales-33-sance-iuquot-19-juin-il-gales-lextrmit-arrondie-ovalaire-quon-peut-appeler-antrieure-avec-le-noyau-et-le-karyosome-occupe-un-des-ples-la-partie-postrieure-plus-ou-moins-effile-constitue-parle-protoplasme-avec-quelques-grains-trs-noirs-de-pigment-mlanique-aboutit-au-ple-oppos-fig-3-et-4-cest-ce-moment-que-lincurvation-se-produit-elle-nest-jamais-trs-accentue-mais-se-distingue-nanmoins-trs-nettement-fig-o-6-7-8-9-lanalogie-avec-les-formes-hmogrgarinie-RED77P.jpg ". Comptes rendus des sances de la Socit de biologie et de ses filiales. (33) SÃANCE IU" 19 JUIN il égales. L'extrémité arrondie-ovalaire, qu'on peut appeler antérieure, avec le noyau et le karyosome. occupe un des pôles ; la partie postérieure, plus ou moins effilée, constituée parle protoplasme avec quelques grains très noirs de pigment mélanique, aboutit au pôle opposé (fig. 3 et 4). C'est à ce moment que l'incurvation se produit. Elle n'est jamais très accentuée, mais se distingue néanmoins très nettement (fig. o, 6, 7, 8, 9). L'analogie avec les formes hémogrégarinie Stock Photo")
RMRED77P–. Comptes rendus des sances de la Socit de biologie et de ses filiales. (33) SÃANCE IU" 19 JUIN il égales. L'extrémité arrondie-ovalaire, qu'on peut appeler antérieure, avec le noyau et le karyosome. occupe un des pôles ; la partie postérieure, plus ou moins effilée, constituée parle protoplasme avec quelques grains très noirs de pigment mélanique, aboutit au pôle opposé (fig. 3 et 4). C'est à ce moment que l'incurvation se produit. Elle n'est jamais très accentuée, mais se distingue néanmoins très nettement (fig. o, 6, 7, 8, 9). L'analogie avec les formes hémogrégarinie
RMRGMP8N–. Bulletin du Musum national d'histoire naturelle. Natural history. â /i05 â 1° Formes endoglobulaires. Les formes les plus petites que nous ayons rencontrées correspondent au stade moyen du développement, car elles mesurent de lo à ii f^ 9 5 de long sur 2 ft 5 de large et présentent déjà l'aspect et les caractères de colorabllité des formes plus âgées. Elles sont légèrement incurvées sur le noyau de l'hématie. Leur karyosome est ovale et central; leur protoplasme finement granuleux (fig: 9). Les grandes formes sont plus nombreuses : elle se présentent comme des vermicides arrond
RMRECXRH–. Comptes rendus hebdomadaires des séances de l'Académie des sciences. Science -- Societies, etc; Science; Science. SÃANCE DU l8 JANVIER 1909. l33 {fig. 2). L'une des extrémités du parasite est grosse, arrondie, l'autre est effilée et d'ordinaire un peu recourbée. Vers la partie moyenne du corps de l'hémogrégarine, on distingue un karyosome de forme allongée, le grand axe du karyosome se confon- dant avec celui du parasite. Le protoplasme se colore en bleu clair; il est homogène ou ne présente que de fines granulations. Le parasite ne paraît pas entouré par une capsule. L'hématie
RMRGNKD9–. Bulletin du MuseÌum d'histoire naturelle. Natural history. â 405 â i° Formes endoglobulaires. Les formes les plus petites que nous ayons rencontrées correspondent au stade moyen du développement, car elles mesurent de 10 à 11 (i 25 de long sur 2 5 de large et présentent déjà l'aspect et les caractères de colorabilité des formes plus âgées. Elles sont légèrement incurvées sur le noyau de l'hématie. Leur karyosome est ovale et central; leur protoplasme finement granuleux (fig. 2). Les grandes formes sont plus nombreuses : elle se présentent comme des vermicules arrondis à l'une d
RMRED5JY–. Comptes rendus des séances de la Société de biologie et de ses filiales. Biology. SÃANCE DU 7 JUIN 1197 division s'enkystent ; la paroi kystique se colore en rose pâle, tandis que la teinte des parasites varie du bleu pâle au violet foncé. Les kystes de multiplication, régulièrement arrondis, mesurent de 8a,30 à 9a,90 de diamètre. Le karyosome se divise d'abord en deux, puis en quatre amas chromatiniens, tandis que le protoplasma reste encore indivis. La masse protoplasmique se répartit en deux ou plus souvent en quatre segments triangulaires. Le karyosome se divise à nouveau et le
RMRED75K–. Comptes rendus des séances de la Société de biologie et de ses filiales. Biology. SÃANCE DU 13 JUILLET 93 garine tandis que le karyosome se reforme et se précise à nouveau par une limite plus ou moins nette. Le mécanisme qui donne naissance à ces granulations chromidiales est trèb semblable à celui que C. W. Hahn considère comme une forme de division du karyosome ; mais dans nos observations cette forme pri- mitive ou inférieure de mitose ne donne pas naissance à deux noyaux mais à un karyosome et à des grains chromidiaux disséminés. On pour- rait plus justement comparer ce phénom
![. Comptes rendus hebdomadaires des séances de l'Académie des sciences. Science -- Societies, etc; Science; Science. Fig. I à 4- â Eimeria cotti n. sp. Fig. 5 et 6. â Eimeria Piraudi n. sp. x if)oo. avec une sorte de reliquat cenlral globuleux {Jîg. i). Les mérozoïtes, de 12!^ à i3^ sur i'^,4, ont leur extrémité antérieure très effilée et possèdent un noyau médian avec karyosome. Les macrogamètes sont sphériques de 11"^ de diamètre. Leur contenu granuleux montre un noyau central souvent étoile avec un karyosome. Dans le cytoplasme, au voisinage de la surface, se voit consta Stock Photo](https://c8.alamy.com/comp/RECTXH/comptes-rendus-hebdomadaires-des-sances-de-lacadmie-des-sciences-science-societies-etc-science-science-fig-i-4-eimeria-cotti-n-sp-fig-5-et-6-eimeria-piraudi-n-sp-x-ifoo-avec-une-sorte-de-reliquat-cenlral-globuleux-jg-i-les-mrozotes-de-12!-i3-sur-i4-ont-leur-extrmit-antrieure-trs-effile-et-possdent-un-noyau-mdian-avec-karyosome-les-macrogamtes-sont-sphriques-de-11quot-de-diamtre-leur-contenu-granuleux-montre-un-noyau-central-souvent-toile-avec-un-karyosome-dans-le-cytoplasme-au-voisinage-de-la-surface-se-voit-consta-RECTXH.jpg ". Comptes rendus hebdomadaires des séances de l'Académie des sciences. Science -- Societies, etc; Science; Science. Fig. I à 4- â Eimeria cotti n. sp. Fig. 5 et 6. â Eimeria Piraudi n. sp. x if)oo. avec une sorte de reliquat cenlral globuleux {Jîg. i). Les mérozoïtes, de 12!^ à i3^ sur i'^,4, ont leur extrémité antérieure très effilée et possèdent un noyau médian avec karyosome. Les macrogamètes sont sphériques de 11"^ de diamètre. Leur contenu granuleux montre un noyau central souvent étoile avec un karyosome. Dans le cytoplasme, au voisinage de la surface, se voit consta Stock Photo")
RMRECTXH–. Comptes rendus hebdomadaires des séances de l'Académie des sciences. Science -- Societies, etc; Science; Science. Fig. I à 4- â Eimeria cotti n. sp. Fig. 5 et 6. â Eimeria Piraudi n. sp. x if)oo. avec une sorte de reliquat cenlral globuleux {Jîg. i). Les mérozoïtes, de 12!^ à i3^ sur i'^,4, ont leur extrémité antérieure très effilée et possèdent un noyau médian avec karyosome. Les macrogamètes sont sphériques de 11"^ de diamètre. Leur contenu granuleux montre un noyau central souvent étoile avec un karyosome. Dans le cytoplasme, au voisinage de la surface, se voit consta
RMRED165–. Comptes rendus des séances de la Société de biologie et de ses filiales. Biology. 750 SOCIETE DE BIOLOGIE mités effilées peuvent alors être tournées en sens inverse, comme dans la figure 10. Après coloration par le procédé indiqué plus haut, on distingue nette- ment un karyosome qui est situé à l'extrémité élargie, ce karyosome sphérique ou ovalaire se colore en rouge violacé, il mesure 0[x7à 0^9 de diamètre. Une zone claire qui existe autour du karyosome repré- sente la partie périphérique du noyau, ou bien le noyau entier se colore.. Globules rouges de bovidés contena
RMRCRHBG–. Elements of biology, with special reference to their rôle in the lives of animals. Biology; Zoology. 30 ELEMENTS OF BIOLOGY type of protoplasm, although it is continuous with the underlying substance. This boundary, known as the plasma membrane, may be, and in many cases is, surrounded by a non-living pellicle or cell WALL, formed by substances constructed by the chemical processes within the cell. CELL WALL N U C u s CHROMATIN KARYOSOME PLASMA MEMBRANE. NUCLEAR MEM BRANE NUCLEAR SAP PLASMOSOME LININ PLASTID GOLGI BODIES CENTROSOME CENTROSPHERE MITOCHONDRIA CYTOPLASM VACUOLE METAPLASM' Fig.
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