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| Registros recuperados: 31 | |
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| SIMÕES,LUCIANA S.; SASAHARA,TAIS H.C.; FAVARON,PHELIPE O.; MARQUES JÚNIOR,RICARDO; OLIVEIRA,MOACIR F. DE; MACHADO,MÁRCIA R.F.; MIGLINO,MARIA ANGELICA. |
| ABSTRACT The germinative, Sertoli and Leydig cells of two caviomorph rodents (Cavia porcellus and Dasyprocta agouti) were counted as well as the estimation of the total volume of the testis and the total volume of seminiferous tubules and interstitium in prepubertal, pubertal and adult animals. The number of spermatogonia, spermatocytes and spermatids cells increased during the pubertal phase in both rodents, notably the spermatid cells. The spermatocyte and spermatid slightly decreased in the adult of both rodents, but the increment in spermatogonia cells number was seen, mainly in cutias. The number of Sertoli cells increased in pubertal rodents, but in the adult the number reduced. Substantial number of Leydig cells was counted in pubertal and adult... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Germinative cells; Hystricomorpha; Reproduction; Stereology. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401745 |
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| Xavier-Vidal,Ricardo. |
| The purpose of this work is to calibrate a not expensive microscope to be applied in Optical Disector estimation. The evaluation of "Z-axis" bias and the "Z-axis" calibration were made utilizing a cover slip and a "manual digimatic outside micrometer scale" (Mitutoyo, Japan). Calibrating the cover slip we performed the calibration of the "Z-axis" of a microscope. In the cover slip two lines were painted with different colors using a pen glass. A blue line was painted on the up surface and another line (red) on the bottom surface of the cover slip forming a cross. Two metal rings with one palette welded in each were adapted in the microscope. Other palette was welded in the gross focuses in order to restrict the route of the fine focuses (Z-axis study)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Stereology; Disector; Optical disector; Morphometry; Z-axis. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652010000200028 |
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| Mandarim-de-Lacerda,Carlos A.. |
| Stereological studies are more and more frequent in literature, particularly in the development/evolution, pathology, and neurosciences areas. The stereology challenge is to understand the structural inner threedimensional arrangement based on the analysis of the structure slices only showing two-dimensional information. Cavalieri and Scherle's methods to estimate volume, and Buffon's needle problem, are commented in the stereological context. A group of actions is needed to appropriately quantify morphological structures (unbiased and reproducibly), e.g. sampling, isotropic and uniform randomly sections (Delesse's principle), and updated stereological tools (disector, fractionator, nucleator, etc). Through the correct stereology use, a quantitative study... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Morphometry; Stereology; Volume density; Surface density; Length density; Disector; Fractionator. |
| Ano: 2003 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000400006 |
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| Marques,C.M.M.; Motta,V.F.; Torres,T.S.; Aguila,M.B.; Mandarim-de-Lacerda,C.A.. |
| C57BL/6 mice develop signs and symptoms comparable, in part, to the human metabolic syndrome. The objective of the present study was to evaluate the effects of exercise training on carbohydrate metabolism, lipid profile, visceral adiposity, pancreatic islet alterations, and nonalcoholic fatty liver disease in C57BL/6 mice. Animals were fed one of two diets during an 8-week period: standard (SC, N = 12) or very high-fat (HF, N = 24) chow. An exercise training protocol (treadmill) was then established and mice were divided into SC and HF sedentary (SC-Sed, HF-Sed), exercised groups (SC-Ex, HF-Ex), or switched from HF to SC (HF/SC-Sed and HF/SC-Ex). HF/HF-Sed mice had the greatest body mass (65% more than SC/SC-Sed; P < 0.0001), and exercise reduced it by... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Obesity; Lipid metabolism; Metabolic syndrome; Aerobic training; Fatty liver; Stereology. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2010000500008 |
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| Diniz,C.G.; Magalhães,N.G.M.; Sousa,A.A.; Santos Filho,C.; Diniz,D.G.; Lima,C.M.; Oliveira,M.A.; Paulo,D.C.; Pereira,P.D.C.; Sherry,D.F.; Picanço-Diniz,C.W.. |
| The semipalmated sandpiper Calidris pusilla and the spotted sandpiper Actitis macularia are long- and short-distance migrants, respectively. C. pusilla breeds in the sub-arctic and mid-arctic tundra of Canada and Alaska and winters on the north and east coasts of South America. A. macularia breeds in a broad distribution across most of North America from the treeline to the southern United States. It winters in the southern United States, and Central and South America. The autumn migration route of C. pusilla includes a non-stop flight over the Atlantic Ocean, whereas autumn route of A. macularia is largely over land. Because of this difference in their migratory paths and the visuo-spatial recognition tasks involved, we hypothesized that hippocampal... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hippocampus; Neurons; Microglia; Shorebirds; Stereology; Morphometry. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2016000100603 |
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| Abreu,C.C.; Fernandes,T.N.; Henrique,E.P.; Pereira,P.D.C.; Marques,S.B.; Herdeiro,S.L.S.; Oliveira,F.R.R.; Magalhães,N.G.M.; Anthony,D.C.; Melo,M.A.D.; Guerreiro-Diniz,C.; Diniz,D.G.; Picanço-Diniz,C.W.. |
| Carassius auratus is a teleost fish that has been largely used in behavioral studies. However, little is known about potential environmental influences on its performance of learning and memory tasks. Here, we investigated this question in C. auratus, and searched for potential correlation between exercise and visuospatial enrichment with the total number of telencephalic glia and neurons. To that end, males and females were housed for 183 days in either an enriched (EE) or impoverished environment (IE) aquarium. EE contained toys, natural plants, and a 12-hour/day water stream for voluntary exercise, whereas the IE had none of the above. A third plus-maze aquarium was used for spatial and object recognition tests. Different visual clues in 2 of its 4 arms... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carassius auratus; Spatial learning and memory; Object recognition; Stereology; Telencephalon; Environmental enrichment. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2019000500602 |
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| García-Flórez,M.; Oliveira,C.A.; Carvalho,H.F.. |
| Complex interactions between androgen and estrogen (E2) regulate prostatic development and physiology. We analyzed the early effects of a high single dose of E2 (25 mg/kg body weight) and castration (separately or combined) on the adult 90-day-old male Wistar rat ventral prostate. Androgen levels, prostate weight, and the variation in the relative and absolute volume of tissue compartments and apoptotic indices were determined for 7 days. Castration and exogenous E2 markedly reduced ventral prostate weight (about 50% of the control), with a significant reduction in the epithelial compartment and increased stroma. The final volume of the epithelium was identical at day 7 for all treatments (58.5% of the control). However, E2 had an immediate effect, causing... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Apoptosis; Estrogen; Prostate; Stereology; Tissue kinetics. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000400002 |
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| Khorsandi,Layasadat; Nejad-Dehbashi,Fereshteh. |
| The aim of this study was to evaluate Exendin-4 (EX-4) effects on islet volume and number in the mouse pancreas. Thirty-two healthy adult male NMRI mice were randomly divided into control and experimental groups. EX-4 was injected intraperitoneally (i. p.) at doses of 0.25 (E1 group), 0.5 (E2 group), and 1 µg/kg (E3 group), twice a day for 7 consecutive days. One day after the final injection, the mice were sacrificed, and the pancreas from each animal dissected out, weighed, and fixed in 10% formalin for measurement of pancreas and islet volume, and determination of islet number by stereological assessments. There was a significant increase in the weight of pancreases in the E3 group. Islet and pancreas volumes in E1 and E2 groups were unchanged compared... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Exendin-4/effects; Exendin-4/experimental study; Pancreas/effects fo Exendin-4; Islet/hypertrophy; Stereology. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000400014 |
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| Registros recuperados: 31 | |
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