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| Registros recuperados: 67 | |
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| Mellado Vázquez, Adriana. |
| Se estudió la influencia de las condiciones de cultivo (clima, riego o temporal y tipo de suelo) en la composición nutrimental de los tejidos del fruto (epicarpio, pulpa, testa y embrión) y en la remoción de nutrimentos por tejido y por tonelada de fruto fresco de los cvs. Ataulfo, Kent, Keitt y Tommy Atkins. Asimismo, en ‘Ataulfo’ y ‘Tommy Atkins’ se estudió la relación entre el contenido nutrimental en suelo, hojas, epicarpio y pulpa (materia seca) y pulpa fresca, con la calidad postcosecha. Se trabajó con árboles altamente productivos (producción superior a los 150 kg·árbol-1), seleccionados en el 2008 de los que se cosecharon frutos en madurez fisiológica. En la materia seca de cada tejido se determinó la concentración de: N, P, K, Ca, Mg, S, Fe, Cu,... |
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Palavras-chave: Mangifera indica; Epicarpio; Pulpa; Testa; Embrión; Calidad postcosecha; Skin; Pulp; Seed coat; Embryo; Post-harvest quality; Doctorado; Fruticultura. |
| Ano: 2012 |
URL: http://hdl.handle.net/10521/736 |
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| Benítez Domínguez, Lizeth. |
| Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de... |
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Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/80 |
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| Jimarez Montiel, María Josefina. |
| Una alternativa para mejorar la producción de plantas de chile habanero es el cultivo de tejidos; no obstante, las características de esta técnica, incrementan considerablemente el costo de las plantas regeneradas y limita su capacidad de adaptación a las condiciones de invernadero o campo. El objetivo de este trabajo fue evaluar el efecto de mezclas de Perlita-Vermiculita (PV), Vermiculita-Perlita (VP), Fibra de coco-Tezontle (FT) y Perlita-Fibra de coco (PF), distintas concentraciones de los componentes del medio de cultivo (sales basales Murashige y Skoog (MS) y la solución nutritiva de Arnon y Hoagland y sacarosa), en la regeneración in vitro de plantas de chile habanero a partir de explantes de embriones e hipocótilos. Los explantes de embrión e... |
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Palavras-chave: Soluciones nutritivas; Sustratos; Embrión; Hipocótilo; Costos; Nutrient solutions; Substrates; Explants; Embryo; Hypocotyl; Producción de Semillas; Maestría. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2302 |
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| Benítez Domínguez, Lizeth. |
| Las heliconias son especies que desempeñan importantes funciones en los ecosistemas y que tienen un valor comercial alto debido a sus vistosas inflorescencias. Estas especies normalmente se reproducen de manera asexual y su producción se reduce a manejos tradicionales, por lo que existen pocos estudios de sus semillas y del manejo nutrimental de las plantas para elevar su producción. En esta investigación de hicieron estudios anatómicos, fisiológico y nutrimentales de cinco especies de heliconias: Heliconia bourgaeana, H. collinsiana, H. latispatha, H. psittacorum y H. rostrata. Las semillas de estas especies resultaron impermeables al agua. En H. collinsiana y H. latispatha los embriones se encontraron bien desarrollados y sin daños después de un año de... |
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Palavras-chave: Heliconiaceae; Embrión; Endospermo; Ácido abscísico; Nutrimentos; Heliconiaceae; Embryo; Endosperm; Abscisic acid; Nutrients; Maestría; Edafología. |
| Ano: 2010 |
URL: http://hdl.handle.net/10521/80 |
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| Lacoue Labarthe, T; Warnau, A; Oberhansli, F; Teyssie, J; Koueta, Noussithe; Bustamante, Paco. |
| Cuttlefish eggs were exposed to background concentrations of dissolved Ag and Cd, using the radiotracers Ag-110m and Cd-109. At different time of the embryonic development (50 days), some eggs were placed in non-contaminating conditions. During the experiment, the uptake and depuration kinetics, and distribution of these metals among the egg compartments (i.e. eggshell, vitellus, peri-vitelline fluid and embryo) were assessed. In parallel, experiments were conducted with sub-lethal concentrations of stable Ag and Cd (2 and 1 mu g l(-1), respectively) to compare the metal behaviour at higher concentrations. From the spawning date up to I month of development, both metals were taken up efficiently by the eggs, reaching load/concentration ratio (LCR) of 1059... |
| Tipo: Text |
Palavras-chave: Cephalopod; Permeability; Eggshell; Embryo; Biokinetics; Silver; Cadmium. |
| Ano: 2008 |
URL: http://archimer.ifremer.fr/doc/2008/publication-3882.pdf |
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| Beiras, Ricardo; His, Edouard. |
| The effects of mercury (Hg) concentrations ranging from 0 (control) to 1024 µg 1-1 upon embryogenesis, survival, growth and metamorphosis of Crassostrea gigas (Thunberg) oyster larvae were investigated. Embryogenesis was abnormal in 50 % of the individuals at 11 µg 1-1 . The 48 h LD50 for D·shaped, umbonate and pediveliger larvae were 33, 115 and 200 µg 1-1 respectively. The increase in LD50 was partially explained by the larval weight increase, although weight-specific tolerance to Hg was higher in smaller larvae. Growth, the most sensitive physiological process studied, was significantly retarded at 4 µg 1-1. The metamorphosis rate was significantly reduced when competent pediveligers were exposed to 64 µg 1-1 for 48 h prior to the addition of the... |
| Tipo: Text |
Palavras-chave: Mercury; Oyster; Larvae; Embryo; Bioassay; Ecotoxicology; Crassostrea gigas. |
| Ano: 1994 |
URL: http://archimer.ifremer.fr/doc/00037/14867/12191.pdf |
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| Beiras, R; His, Edouard. |
| The effects of Hg concentrations ranging from 0 (control) to 1024 mu g l(-1) upon embryogenesis, survival and growth of Mytilus galloprovincialis mussel larvae were investigated. Embryogenesis was abnormal in 50% of the individuals at 10 mu g l(-1). The 48 h LC(50) for D-shaped, early umbonate, late umbonate and eyed larvae were 51, 164, 322 and 383 pg l(-1) respectively. The LC(50) was an allometric function of ash-free dry weight with exponent b = 0.60. Larval growth was significantly reduced after 6 d exposure to 4 mu g Hg l(-1) and after 10 d exposure to 2 mu g l(-1). No significant differences in lethal or sublethal sensitivity to Hg were found between M. galloprovincialis and previously studied Crassostrea gigas embryos and larvae. The implications... |
| Tipo: Text |
Palavras-chave: Mercury; Mytilus; Mussel; Larva; Growth; Embryo; Bioassay; Ecotoxicology. |
| Ano: 1995 |
URL: http://archimer.ifremer.fr/doc/00258/36946/35665.pdf |
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| Pradillon, F; Le Bris, Nadine; Shillito, B; Young, C; Gaill, F. |
| Dispersal and colonisation processes at deep-sea vents are still not fully understood, essentially because early life stages of vent species remain unknown. The polychaete worm Alvinella pompejana forms colonies on chimney walls at East Pacific Rise vent sites where the temperature can frequently exceed 20 degrees C. In vitro studies in pressure vessels showed that the early embryos tolerate temperatures in a lower range (10-14 degrees C), suggesting that they would have to escape the colony to develop. Pressure vessels offer the advantage that each parameter can be independently controlled, but they do not simulate the more complex and dynamic conditions naturally encountered at vent sites. Accordingly, in addition to incubations in pressure vessels, we... |
| Tipo: Text |
Palavras-chave: Environmental condition; H2S; Temperature tolerance; Polychaete; Pressure vessel; Embryo; Development; Hydrothermal vent. |
| Ano: 2005 |
URL: http://archimer.ifremer.fr/doc/2005/publication-600.pdf |
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| Hernández-Gómez,Raúl E; Perera-Garcia,Martha A; Valenzuela C,Ignacio; Duran M,Temani; Mendoza-Carranza,Manuel. |
| The description of the embryonic and larval development was based on 30 eggs and 30 larvae. Breeders were collected on the Usumacinta River, Tabasco, Mexico and were subjected to manual fertilization in May 2011. Fertilized eggs were spherical, pelagic, translucent and non-adhesive and had an average diameter of 1.07 mm (SD = 0.10), showing a concentric lipid droplet of 0.85 mm (SD = 0.02). The embryo occupied 100% of the perivitelline space at hour 14:08 post-fertilization and the egg measured 1.18 mm (SD = 0.14) at this stage. Eclosion started 17 hours post-fertilization when larvae had a length of 2.54 mm (SD = 0.66). Eight preanal and 13 postanal myomeres were observed exhibiting a light brown color. The morphologic characters recorded in this study... |
| Tipo: Journal article |
Palavras-chave: Embryo; Drum; Aplodinotus grunniens; Usumacinta. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200047 |
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| Spósito,Danilo Rodrigues; Santos Jr,Arnaldo Rodrigues. |
| Embryo implantation is the process that results in attachment of the conceptus to the uterine wall. In this histochemical study, we investigated the early stage of embryo implantation in rats by morphological analysis and by the detection of total proteins and glycosaminoglycans using hematoxylin-eosin, toluidine blue at pH 4.0 (TB), and Xylidine Ponceau at pH 2.5 (XP). In non-pregnant females, the uterine layers could be clearly distinguished and showed the normal histology of the organ. In pregnant females, an increase in the number of cells and a reduction in the interstitial space were observed in the endometrium close to the implantation sites. The blastocyst was partially inserted in the endometrium, with the observation of the inner cells mass... |
| Tipo: Journal article |
Palavras-chave: Implantation window; Endometrium; Trophoblast; Embryo. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022011000100032 |
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| Fakheri,Taravat; Nankali,Anisodowleh; Khazaei,Mozafar; Ghanbari,Ali; Abedini,Mehrandokht; Saeidiborojeni,Hamidreza. |
| There were no significant differences in the distribution of embryos reaching to 2- cells, 4- cells, morula or blastocysts culturing on human endometrial stromal cells (Secretory or proliferative phases). The percent of morula in stage A (without fragmentation), stage B (<25% fragmentation), stage C (25-50% fragmentation) and stage D (>50% fragmentation) and did not showed significant differences between two coculture groups. Thus, the phase that the endometrial stromal cells were in thereby did not affect on the quality of embryos. |
| Tipo: Journal article |
Palavras-chave: Co-culture; Embryo; Endometrium; Mice; Proliferative phase; Secretory phase. |
| Ano: 2012 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022012000400014 |
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| Kazemi,Masoomeh; Tekieh,Elaheh; Golabi,Sahar; Sahraei,Hedayat. |
| Based on previous studies, a variety of bioenvironmental elements including inappropriate nutrition, diseases, infections, stressors, and medications are involved in epigenetic changes. Drug abuse is one of the most important causes of epigenetic changes and a concern in today's world. Studies have shown that morphine use by pregnant mothers causes several disorders in mothers in addition to transferring abnormalities to the next generation (placenta and embryo). Epigenetic factors such as morphine cause changes in gene expression in placenta as the first embryonic defense barrier. Because placenta does all the nutritional exchanges between mother's and embryo's blood, placental health guarantees normal embryonic development. Many studies have been... |
| Tipo: Journal article |
Palavras-chave: Development; Morphine; Embryo; Epigenetic; Pregnancy; Placenta. |
| Ano: 2016 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022016000100036 |
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| Edagha,Innocent A; Shokunbi,Matthew T; Adenipekun,Adeniyi A; Bassey,Rosemary B; Ekong,Moses B. |
| The aim was to study the effect of preconception gamma irradiation on the gross morphometry of the adult female mice and its embryo. Twenty-seven mice; 18 females and 9 males: subdivided into 3 groups namely (Control, Non-Irradiation and Radiation) containing 6 females and 3 male mice each in 2:1 ratio. A gamma irradiation dose of 1Gy/min was delivered to each batch of mice exposed by a Cobalt 60, Theratron 780c model, by Atomic Energy of Canada Limited (AECL) at the Radiotherapy department of the University College Hospital, Ibadan. All the animals were mated 1 week post irradiation. Vaginal plugs were confirmed, and the pregnant females were sacrificed on day 14 of gestation by chloroform inhalation. The gross morphology of the female mice and their... |
| Tipo: Journal article |
Palavras-chave: Preconception; Irradiation; Gamma ray; Spinal cord; Embryo. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022013000200039 |
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| Registros recuperados: 67 | |
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