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 | Acceso al texto completo restringido a Biblioteca INIA Tacuarembó. Por información adicional contacte bibliotb@tb.inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA Tacuarembó. |
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Fecha : |
15/05/2015 |
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Actualizado : |
03/02/2020 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Autor : |
VIÑOLES, C.; FORSBERG, M.; BANCHERO, G.; RUBIANES, E. |
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Afiliación : |
CAROLINA VIÑOLES GIL, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; Centre for Reproductive Biology, Department of Clinical Chemistry, Swedish University of Agricultural Sciences, Uppsala, Swed;Universidad de la República (UdelaR)/ Facultad de Veterinaria; M. FORSBERG, Centre for Reproductive Biology, Department of Clinical Chemistry, Swedish University of Agricultural Sciences, Uppsala, Swed; GEORGGET ELIZABETH BANCHERO HUNZIKER, INIA (Instituto Nacional de Investigación Agropecuaria), Uruguay; E. RUBIANES, Universidad de la República (UdelaR)/ Facultad de Veterinaria. |
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Título : |
Ovarian follicular dynamics and endocrine profiles in Polwarth ewes with high and low body condition. |
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Fecha de publicación : |
2002 |
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Fuente / Imprenta : |
Animal Science, 2002, v. 74, no. 3, p. 539-545. |
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DOI : |
10.1017/S1357729800052693 |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 20 July 2001 // Accepted 14 November 2001 // Published online by Cambridge University Press: 18 August 2016. |
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Contenido : |
In this investigation we tested the hypothesis that static body condition (BC) of the ewe affects oestradiol and FSH with implications for subsequent follicular growth and turn-over. Sixteen Polwarth ewes were selected from a flock according to their BC score (scale: 1 emaciated; 5 obese). High BC (HBC) ewes (no. = 8) had a BC score of 4.1 (s.e. 0.1) and low BC (LBC) ewes (no. = 8) had a BC score of 1.9 (s.e. 0.1). Daily ultrasound examinations were performed and blood samples for progesterone, oestradiol and follicle-stimulating hormone (FSH) determination were collected. All HBC ewes (8/8) exhibited three waves of follicular development, while four LBC ewes (418) had two waves and the other four (4/8) had three waves of follicular development (P less than or equal to0.05) during the interovulatory period. Overall, the emergences of 33 out of 44 follicular waves were preceded by significant increases in FSH concentrations. Maximum FSH concentrations were detected 0.9 +/- 0.2 days before wave emergence. Oestradiol concentrations increased significantly during the growing phase in 38 out of 44 large follicles. A negative correlation between oestradiol and FSH was observed in HBC ewes. A similar inhibitory effect of oestradiol on FSH was observed in LBC ewes, irrespective of whether they developed two or three follicular waves. However, a longer period with high FSH was needed to promote the emergence of the second follicular wave in two-wave LBC ewes. Four HBC ewes had twin ovulations but no LBC ewes did (P less than or equal to 0.05). In HBC ewes, the follicular phase was characterized by lower oestradiol (6.5 (s.e. 1.0) pmol/l) but higher mean FSH concentrations (2.4 (s.e. 0.4) mug/l) than in LBC ewes (8.9 (s.e. 1.2) pmol/l and 2.0 (s.e. 0.3) mug/l, respectively, P less than or equal to 0.05). The present results suggest that BC influences the pattern of follicular dynamics through changes in the endocrine milieu. Higher FSH concentrations during the follicular phase in HBC ewes, which allowed an extended period of follicular recruitment from a significantly larger pool of small antral follicles could explain the higher ovulation rate observed in this group. MenosIn this investigation we tested the hypothesis that static body condition (BC) of the ewe affects oestradiol and FSH with implications for subsequent follicular growth and turn-over. Sixteen Polwarth ewes were selected from a flock according to their BC score (scale: 1 emaciated; 5 obese). High BC (HBC) ewes (no. = 8) had a BC score of 4.1 (s.e. 0.1) and low BC (LBC) ewes (no. = 8) had a BC score of 1.9 (s.e. 0.1). Daily ultrasound examinations were performed and blood samples for progesterone, oestradiol and follicle-stimulating hormone (FSH) determination were collected. All HBC ewes (8/8) exhibited three waves of follicular development, while four LBC ewes (418) had two waves and the other four (4/8) had three waves of follicular development (P less than or equal to0.05) during the interovulatory period. Overall, the emergences of 33 out of 44 follicular waves were preceded by significant increases in FSH concentrations. Maximum FSH concentrations were detected 0.9 +/- 0.2 days before wave emergence. Oestradiol concentrations increased significantly during the growing phase in 38 out of 44 large follicles. A negative correlation between oestradiol and FSH was observed in HBC ewes. A similar inhibitory effect of oestradiol on FSH was observed in LBC ewes, irrespective of whether they developed two or three follicular waves. However, a longer period with high FSH was needed to promote the emergence of the second follicular wave in two-wave LBC ewes. Four HBC ewes had twin o... Presentar Todo |
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Palabras claves : |
CONFORMATION; EWES; FOLLICLES; FSH; OESTRADIOL. |
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Thesagro : |
MEDICINA VETERINARIA. |
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Asunto categoría : |
L53 Fisiología Animal - Reproducción |
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Marc : |
LEADER 03013naa a2200253 a 4500
001 1052635
005 2020-02-03
008 2002 bl uuuu u00u1 u #d
024 7 $a10.1017/S1357729800052693$2DOI
100 1 $aVIÑOLES, C.
245 $aOvarian follicular dynamics and endocrine profiles in Polwarth ewes with high and low body condition.
260 $c2002
500 $aArticle history: Received 20 July 2001 // Accepted 14 November 2001 // Published online by Cambridge University Press: 18 August 2016.
520 $aIn this investigation we tested the hypothesis that static body condition (BC) of the ewe affects oestradiol and FSH with implications for subsequent follicular growth and turn-over. Sixteen Polwarth ewes were selected from a flock according to their BC score (scale: 1 emaciated; 5 obese). High BC (HBC) ewes (no. = 8) had a BC score of 4.1 (s.e. 0.1) and low BC (LBC) ewes (no. = 8) had a BC score of 1.9 (s.e. 0.1). Daily ultrasound examinations were performed and blood samples for progesterone, oestradiol and follicle-stimulating hormone (FSH) determination were collected. All HBC ewes (8/8) exhibited three waves of follicular development, while four LBC ewes (418) had two waves and the other four (4/8) had three waves of follicular development (P less than or equal to0.05) during the interovulatory period. Overall, the emergences of 33 out of 44 follicular waves were preceded by significant increases in FSH concentrations. Maximum FSH concentrations were detected 0.9 +/- 0.2 days before wave emergence. Oestradiol concentrations increased significantly during the growing phase in 38 out of 44 large follicles. A negative correlation between oestradiol and FSH was observed in HBC ewes. A similar inhibitory effect of oestradiol on FSH was observed in LBC ewes, irrespective of whether they developed two or three follicular waves. However, a longer period with high FSH was needed to promote the emergence of the second follicular wave in two-wave LBC ewes. Four HBC ewes had twin ovulations but no LBC ewes did (P less than or equal to 0.05). In HBC ewes, the follicular phase was characterized by lower oestradiol (6.5 (s.e. 1.0) pmol/l) but higher mean FSH concentrations (2.4 (s.e. 0.4) mug/l) than in LBC ewes (8.9 (s.e. 1.2) pmol/l and 2.0 (s.e. 0.3) mug/l, respectively, P less than or equal to 0.05). The present results suggest that BC influences the pattern of follicular dynamics through changes in the endocrine milieu. Higher FSH concentrations during the follicular phase in HBC ewes, which allowed an extended period of follicular recruitment from a significantly larger pool of small antral follicles could explain the higher ovulation rate observed in this group.
650 $aMEDICINA VETERINARIA
653 $aCONFORMATION
653 $aEWES
653 $aFOLLICLES
653 $aFSH
653 $aOESTRADIOL
700 1 $aFORSBERG, M.
700 1 $aBANCHERO, G.
700 1 $aRUBIANES, E.
773 $tAnimal Science, 2002$gv. 74, no. 3, p. 539-545.
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Registro original : |
INIA Tacuarembó (TBO) |
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| Acceso al texto completo restringido a Biblioteca INIA La Estanzuela. Por información adicional contacte bib_le@inia.org.uy. |
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Registro completo
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Biblioteca (s) : |
INIA La Estanzuela. |
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Fecha actual : |
16/09/2014 |
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Actualizado : |
11/10/2019 |
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Tipo de producción científica : |
Artículos en Revistas Indexadas Internacionales |
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Circulación / Nivel : |
B - 1 |
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Autor : |
ARLÓ, L; BERETTA, A.; PERDOMO, C. H. |
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Afiliación : |
ANDRES NICOLAS BERETTA BLANCO, Instituto Nacional de Investigación Agropecuaria (INIA), Uruguay. |
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Título : |
A quick test based on Cataldo´s method to determine nitrate in fresh tissue extracts. |
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Fecha de publicación : |
2015 |
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Fuente / Imprenta : |
Journal of Plant Nutrition, v. 38, n. 1, p. 1-12, 2015. |
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ISSN : |
1532-4087. |
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DOI : |
10.1080/01904167.2013.878354. |
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Idioma : |
Inglés |
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Notas : |
Article history: Received 17 Feb 2012/ Accepted 05 Dec 2013/ Accepted author version posted online: 31 Dec 2013/ Published online: 29 Sep 2014. |
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Contenido : |
Abstract:
Leafy vegetables could accumulate nitrate (NO3?) above limits safe for humans, hence it would be advisable to customarily determine their NO3? concentration. We wanted to develop a quick test to determine NO3? concentration in fresh tissue extracts and estimate the error of using this test to identify samples with NO3? concentrations above the World Health Organization (WHO) threshold. There was a positive linear relationship (P < 0.001) between NO3? concentrations determined by the quick test and by potentiometry in dry tissue extracts. Samples were classified as ?acceptable? or ?excessive? according to their potentiometric NO3? concentration, using a critical level of 75% (p) of the observed NO3? distribution. According to the Cate-Nelson model, the quick test identified as ?acceptable? from 5.6% to 15.4% of samples that were in the ?excessive? category. In spite of this error rate, the quick test use would improve consumers? protection, because no controls on vegetables NO3? concentration are available in Uruguay. |
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Palabras claves : |
ACCEPTABLE DAILY INTAKE; ALIMENTACIÓN HUMANA; DETERMINACIÓN DE NITRATOS EN TEJIDOS VEGETALES; GREEN LEAFY VEGETABLES; INGESTA DIARIA ADMISIBLE; NITRATE TOXICITY; TOXICIDAD DE NITRATOS; VERDURAS DE HOJA. |
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Thesagro : |
TOXICOLOGÍA. |
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Asunto categoría : |
Q03 Contaminación y toxicología de los alimentos |
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Marc : |
LEADER 02076naa a2200289 a 4500
001 1050314
005 2019-10-11
008 2015 bl uuuu u00u1 u #d
022 $a1532-4087.
024 7 $a10.1080/01904167.2013.878354.$2DOI
100 1 $aARLÓ, L
245 $aA quick test based on Cataldo´s method to determine nitrate in fresh tissue extracts.$h[electronic resource]
260 $c2015
500 $aArticle history: Received 17 Feb 2012/ Accepted 05 Dec 2013/ Accepted author version posted online: 31 Dec 2013/ Published online: 29 Sep 2014.
520 $aAbstract: Leafy vegetables could accumulate nitrate (NO3?) above limits safe for humans, hence it would be advisable to customarily determine their NO3? concentration. We wanted to develop a quick test to determine NO3? concentration in fresh tissue extracts and estimate the error of using this test to identify samples with NO3? concentrations above the World Health Organization (WHO) threshold. There was a positive linear relationship (P < 0.001) between NO3? concentrations determined by the quick test and by potentiometry in dry tissue extracts. Samples were classified as ?acceptable? or ?excessive? according to their potentiometric NO3? concentration, using a critical level of 75% (p) of the observed NO3? distribution. According to the Cate-Nelson model, the quick test identified as ?acceptable? from 5.6% to 15.4% of samples that were in the ?excessive? category. In spite of this error rate, the quick test use would improve consumers? protection, because no controls on vegetables NO3? concentration are available in Uruguay.
650 $aTOXICOLOGÍA
653 $aACCEPTABLE DAILY INTAKE
653 $aALIMENTACIÓN HUMANA
653 $aDETERMINACIÓN DE NITRATOS EN TEJIDOS VEGETALES
653 $aGREEN LEAFY VEGETABLES
653 $aINGESTA DIARIA ADMISIBLE
653 $aNITRATE TOXICITY
653 $aTOXICIDAD DE NITRATOS
653 $aVERDURAS DE HOJA
700 1 $aBERETTA, A.
700 1 $aPERDOMO, C. H.
773 $tJournal of Plant Nutrition$gv. 38, n. 1, p. 1-12, 2015.
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