FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W430944426> ?p ?o ?g. }

• W430944426 endingPage "228" @default.
• W430944426 startingPage "219" @default.
• W430944426 abstract "Employing the carp, Cyprinus carpio L. as the meterial, the processes of maturation of the egg and the phenomena of fertilization were microscopically observed in this study. Observations were carried on in the sections of the eggs, fixed at different intervals ranging from five minutes to 2 hours after fertilization. The majority of eggs were fixed in Carothers' solution and some were preserved in Gilson's fluid. For sectioning the Gilson material proved to be better than the Carothers material. Sections were made following the usual paraffin method. They were stained with Ehrlich's haematoxylin. The results of observations are briefly outlined as follows:1) The first maturation division of the egg is completed prior to ovulation within the ovary. After the extrusion of the first polar body, the chromosomes remaining in the egg are immdiately drawn into the equatorial plate forming the metaphase spindle of the second maturation division (Fig. 4).2) The spawning and fertilization take place in the water at the same time.3) At the time of insemination the second maturation division of the egg persists in the stage of metaphase, and then it gradually advances in further course of division (Fig. 8). About 25 to 30 minutes after insemination the second division is completed, resulting in the formation of the second polar body (Fig. 9).4) During the ovulation process the course of the second division does not proceed being arrested in metaphase. Stages subsequent to the metaphase of the second division take place only after the entry of the spermatozoon into the egg. This fact emphasizes that insemination is a necessary antecedent to the second maturation division to advance further from metaphase.5) Only a single spermatozoon enters an egg (Fig. 7). Thus the carp egg is monospermic in fertilization under the normal condition.6) About 40 to 50 minutes after insemination there is found at the animal pole of the egg the already metamorphosed female pronucleus. It assumes a spherical shape lying in naked state in the ooplasm (Fig. 13).7) As early as 50-60 minutes after entrance, the head of the spermatozoon is converted into the male pronucleus attaining nearly spherical form (Figs. 10-12). At this stage there is no visible demarkation between the male and female pronuclei, so far as their structure and size are concerned. But there is present a ramarkable character peculiar to the male pronucleus. That is the pronounced appearance of the sperm-aster.8) After completion both the pronuclei begin to move towards the deeper part of the animal pole of the egg to conjugate with each other (Fig. 14). The conjugation of the pronuclei generally takes place about 1 hour after insemination occurs (Figs. 15-17).9) After the two pronuclei conjugate together, they do not actually fuse, but lie side by side in closs contact with the nuclear membrance intact (Figs. 15-16). Thus the maternal and paternal chromosome materials are separated in distinct groups during the stages prior to the first cleavage division. The chromosomes are formd independently in each vesicle (Fig. 17).10) In the egg about 11/2 hours after fertilization, the first cleavage spindle is generally formed (Fig. 18)." @default.
• W430944426 created "2016-06-24" @default.
• W430944426 creator A5080916275 @default.
• W430944426 date "1943-01-01" @default.
• W430944426 modified "2023-09-25" @default.
• W430944426 title "Cytological observations on fertilization in the carp, <i>Cyprinus</i> <i>carpio</i> L." @default.
• W430944426 cites W1415996897 @default.
• W430944426 cites W1965337713 @default.
• W430944426 cites W1970036643 @default.
• W430944426 cites W1986140299 @default.
• W430944426 cites W1987933553 @default.
• W430944426 cites W2009972605 @default.
• W430944426 cites W2040273778 @default.
• W430944426 cites W2068605383 @default.
• W430944426 cites W2079510628 @default.
• W430944426 cites W2101439589 @default.
• W430944426 cites W2482551610 @default.
• W430944426 cites W2525038165 @default.
• W430944426 cites W3025464744 @default.
• W430944426 cites W3120312185 @default.
• W430944426 doi "https://doi.org/10.1266/jjg.19.219" @default.
• W430944426 hasPublicationYear "1943" @default.
• W430944426 type Work @default.
• W430944426 sameAs 430944426 @default.
• W430944426 citedByCount "9" @default.
• W430944426 crossrefType "journal-article" @default.
• W430944426 hasAuthorship W430944426A5080916275 @default.
• W430944426 hasBestOaLocation W4309444261 @default.
• W430944426 hasConcept C104317684 @default.
• W430944426 hasConcept C105702510 @default.
• W430944426 hasConcept C16685009 @default.
• W430944426 hasConcept C196843134 @default.
• W430944426 hasConcept C201604863 @default.
• W430944426 hasConcept C2776690073 @default.
• W430944426 hasConcept C2777005246 @default.
• W430944426 hasConcept C2777702977 @default.
• W430944426 hasConcept C2779234561 @default.
• W430944426 hasConcept C2780326611 @default.
• W430944426 hasConcept C2781087480 @default.
• W430944426 hasConcept C2909208804 @default.
• W430944426 hasConcept C30481170 @default.
• W430944426 hasConcept C33923547 @default.
• W430944426 hasConcept C505870484 @default.
• W430944426 hasConcept C54355233 @default.
• W430944426 hasConcept C59822182 @default.
• W430944426 hasConcept C60798267 @default.
• W430944426 hasConcept C70278784 @default.
• W430944426 hasConcept C71924100 @default.
• W430944426 hasConcept C86803240 @default.
• W430944426 hasConcept C88972607 @default.
• W430944426 hasConcept C94375191 @default.
• W430944426 hasConcept C95444343 @default.
• W430944426 hasConceptScore W430944426C104317684 @default.
• W430944426 hasConceptScore W430944426C105702510 @default.
• W430944426 hasConceptScore W430944426C16685009 @default.
• W430944426 hasConceptScore W430944426C196843134 @default.
• W430944426 hasConceptScore W430944426C201604863 @default.
• W430944426 hasConceptScore W430944426C2776690073 @default.
• W430944426 hasConceptScore W430944426C2777005246 @default.
• W430944426 hasConceptScore W430944426C2777702977 @default.
• W430944426 hasConceptScore W430944426C2779234561 @default.
• W430944426 hasConceptScore W430944426C2780326611 @default.
• W430944426 hasConceptScore W430944426C2781087480 @default.
• W430944426 hasConceptScore W430944426C2909208804 @default.
• W430944426 hasConceptScore W430944426C30481170 @default.
• W430944426 hasConceptScore W430944426C33923547 @default.
• W430944426 hasConceptScore W430944426C505870484 @default.
• W430944426 hasConceptScore W430944426C54355233 @default.
• W430944426 hasConceptScore W430944426C59822182 @default.
• W430944426 hasConceptScore W430944426C60798267 @default.
• W430944426 hasConceptScore W430944426C70278784 @default.
• W430944426 hasConceptScore W430944426C71924100 @default.
• W430944426 hasConceptScore W430944426C86803240 @default.
• W430944426 hasConceptScore W430944426C88972607 @default.
• W430944426 hasConceptScore W430944426C94375191 @default.
• W430944426 hasConceptScore W430944426C95444343 @default.
• W430944426 hasIssue "5" @default.
• W430944426 hasLocation W4309444261 @default.
• W430944426 hasOpenAccess W430944426 @default.
• W430944426 hasPrimaryLocation W4309444261 @default.
• W430944426 hasVolume "19" @default.
• W430944426 isParatext "false" @default.
• W430944426 isRetracted "false" @default.
• W430944426 magId "430944426" @default.
• W430944426 workType "article" @default.