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| Registros recuperados: 23 | |
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| FUJlHIRA, Takuma; KINOSHITA, Mikio; SASAKI, Motoki; OHNISHI, Masao; ISHIKAWA, Hajime; OHSUMI, Seiji; FUKUI, Yutaka; 木下, 幹朗; 佐々木, 基樹; 大西, 正男. |
| The present study was conducted to clarify the difference in the color of the cytoplasm in immature follicular oocytes from prepubertal and adult minke whales. The four lipid contents (triglyceride，total cholesterol phospholipids and non-esterified fatty acids) in vitrified immature oocytes from prepubertal and adult minke whales，and also in fresh and vitrified immature porcine oocytes，were measured. The lipid contents in vitrified-warmed minke whale oocytes were similarly high compared with those in vitrified-warmedp orcine oocytes. In particular，the total cholesterol and phospholipid contents in the vitrified immature oocytes from prepubertal and adult minke whales were significantly( P<0.05) higher than those from prepubertal pigs. Furthermore，the... |
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Palavras-chave: Minke whale; Porcine; Oocytes; Lipid; Sexual maturity. |
| Ano: 2004 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2731 |
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| Max, Marilu Constantino; Andrade, Evelyn Rabelo de; Basso, Andrea Cristina; de Figueiredo, José Ricardo; Seneda, Marcelo Marcondes. |
| Objective: To disclose a new biotechnique, listing some of its aspects and addressing its main stages, isolation, cryopreservation and culture of preantral follicles. Data Sources: The information was obtained from CAB, MEDLINE, PUBMED, Science Direct and CAPES Portal. Data Synthesis: The preantral follicles store about 90% of the oocytes within the ovary. The biotechnique described is based on recovering immature oocytes retained inside preantral follicles before atresia takes place. The cryopreservation of these cells enables the creation of germoplasm banks, preserving the genetic material of women submitted to chemotherapy and/or radiotherapy, as well as that endangered animal species. Conclusions: Being a recent biotechnique, its application is... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biotechonology; Reproductive techniques; Oocytes; Transplantation; Ovarianfollicles; Cryopreservation Biotecnologia; Técnicas reproductivas; Oocitos; Transplantación; Foliculo ovárico; Criopreservación biotecnologia; Técnicas reprodutivas; Oócitos; Transplante; Folículo ovariano; Criopreservação. |
| Ano: 2004 |
URL: http://www.revistamvez-crmvsp.com.br/index.php/recmvz/article/view/3239 |
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| Oliveira,Classius de; Santos,Lia Raquel de Souza. |
| This paper describes morphological characteristics of the ovarian germinative cells of the Scinax fuscovarius (Lutz, 1925). The ovary is organized in primordial germinative cells (oogonia) and follicular structures (ovarian follicle) - oocytes surrounded by follicular cells. Oogonia: their nests are peripherically localized, containing cells with large and oval nucleus. Oocytes I: basophilic cytoplasm; the spherical nucleus presents few nucleoli, one or two; the follicular cells (one tenuous layer) surround these previtellogenic cells. Oocytes II: the cell is larger and the cytoplasm becomes more basophilic; the nucleus presents few nucleoli and contains many chromosomes in the periphery (beginning the perinucleolar stage). Oocytes III: the cytoplasm... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Oocytes; Oogonia; Ovary; Pigment; Vitellogenesis. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000400029 |
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| Santos,Rodrigo Marques dos; Barreta,Marcos Henrique; Frajblat,Marcel; Cucco,Diego Córdova; Mezzalira,Joana Claudia; Bunn,Silvério; Cruz,Fabiano Buss; Vieira,Arnaldo Diniz; Mezzalira,Alceu. |
| The objective of this study was to determine the effects of vacuum-cooled liquid nitrogen on the development of vitrified immature (germinal vesicle stage; GV) and mature (metaphase II; MII) bovine oocytes after re-warming. Liquid nitrogen was exposed to either atmospheric pressure or to a vacuum (300mm Hg for 45sec); the latter decreased the temperature of the liquid nitrogen to -200°C. Partially denuded oocytes were vitrified either just after selection (GV) or after 22 hours of in vitro maturation (MII) in TCM 199 medium + 10% of estrous mare serum. For vitrification, oocytes were firstly exposed to an intermediate solution (10% EG + 10% DMSO) for 30sec, followed by the vitrification solution (20% EG + 20% DMSO + 0.5M sucrose) for 20sec. Groups of three... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Vitrification; Cryopreservation; Oocytes; Bovine; Vacuum. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782006000500024 |
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| Dutertre, Mickael; Beninger, Peter G.; Barille, Laurent; Papin, Mathias; Rosa, Philippe; Barille, Anne-laure; Haure, Joel. |
| The proliferation of the voluntarily-introduced cupped oyster, Crassostrea gigas, has attained the proportions of species invasion in many intertidal habitats in Europe, presumably resulting from successful reproduction of farmed individuals. It is thus imperative to better understand the reproductive characteristics of farmed oysters, since they are directly under human control. We quantified the dry tissue mass (DTM), gametosomatic index (GSI), and reproductive cycle of farmed oysters at two sites in Bourgneuf Bay, France, in relation to environmental parameters using continuously-recording probes in 2005 and 2006. The GSI was developed for this study, based on the actual area occupied by gametes, rather than the area of the gonad previously used for... |
| Tipo: Text |
Palavras-chave: Atlantic Ocean; Crassostrea gigas; Oyster farming; Bivalve; Gametosomatic index; Biological invasion; Atresia; Oocytes; Turbidity; Temperature; Reproduction. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-6871.pdf |
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| Pessoa,G.A; Navarro,R.B; Rauber,L.P; Brass,K.E; Silva,C.A.M; Rubin,M.I.B. |
| Temperature and rainfall were analyzed daily during six years to evaluate their influence on in vitro production of bovine embryos. Weekly replications (n=480) were performed on 14,778 ovaries collected at slaughterhouses. Cumulus oocyte complexes (n=19,180) were fertilized with a pool of Bos taurus taurus semen in one incubator with 5% CO2. Presumable zygotes were cultured in gasified plastic bags with 5% CO2, 5% O2, and 90% N2. In the first year, cleavage and embryo yield were 60.3% and 15.6%, respectively, being lower (P<0.05) than in the following years. Average cleavage rates were always lower in winter (P<0.0001), thus producing less embryos. Winter climatic conditions had a negative influence on in vitro production, when cleavage and embryo... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cow; Oocytes; Embryo; Climate; In vitro prodution. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352010000600013 |
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| Navarrete Gómez,Patricia; Ormeño,David; Miranda,Antonio; Sánchez Gutiérrez,Raúl; Romero Mejía,Fernando; Parodi Rivera,Jorge. |
| Since the 1970s, There have been studies of the venom of Latrodectus sp. spiders, in particular the latrotoxin (LTX) of Latrodectus mactans. Many of the studies were aimed at understanding the action of the venom on the muscular system. Now accepted that LTX is able to generate a calcium-permeable membrane pore and modulate the release of synaptic vesicles that activate a receptor and induce cellular changes. Interestingly, when work began with venom obtained from the Latrodectus sp present in Chile, it generated clinical indications similar to the bite of this spider in another country, with some differences in intensity. The purpose of the first studies was to understand the systemic mechanisms of this venom, and other active compounds were studied for... |
| Tipo: Journal article |
Palavras-chave: Latrodectus venom; Oocytes; Neurons; Spermatozoa; Contraceptive. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000300012 |
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| Fernandes,Cezar A. F.; Oliveira,Paulo G. V. de; Travassos,Paulo E. P.; Hazin,Fábio H. V.. |
| Reproductive aspects of the Brazilian snapper Lutjanus alexandrei, were characterized, including a description of the development of oocytes and spermatogenic cells, size at first sexual maturity, and fecundity. A total of 540 fish were analyzed with 250 having their gonads sectioned to allow microscopic evaluation. Six maturity stages were identified for females and males: immature, maturing, mature, spawning, spawned, and resting. Fish standard length (SL) varied from 13.0 to 28.3 cm and sex ratio was 1.6 males: 1.0 females. Monthly distributions of mean Gonadosomatic Index (GSI) and maturity stages suggest that spawning occurs mainly in a protracted period, during the warmer months, from November to March. The size of first sexual maturity was estimated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Multiple spawning; Oocytes; Sexual maturity; Spermatogenic cells. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252012000300012 |
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| Cruz,Maria Helena Coelho; Saraiva,Naiara Zoccal; Cruz,Jurandir Ferreira da; Oliveira,Clara Slade; Del Collado,Maite; Fernandes,Hugo; Castro,Fernanda Cavallari de; Garcia,Joaquim Mansano. |
| This study evaluated the influence of follicular fluid (FF) added to the maturation medium on the quality of bovine embryos produced in vitro. In the first experiment, oocytes were matured in media containing five different FF concentrations with different maturation times and classified according to meiotic progression and migration of cortical granules. In the second experiment, oocytes matured in the same media were fertilized at three different maturation times; thereafter, cleavage and blastocyst rates were evaluated. In the third experiment, oocytes were matured in media containing three different FF concentrations at two different maturation times, and embryo quality, inferred by the ratio of inner cell mass and trophectoderm cells compared with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Embryo development; Inner cell mass; In vitro fertilization; Oocytes. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300003 |
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| Registros recuperados: 23 | |
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