216,433 research outputs found
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Photo of Mr. Noe P. Jimenez (Photograph)
No full textMr. Noe P. Jimenez poses for the camera
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A letter from Sarita Jimenez to Dr. Hector P. Garcia, asking for his support in her nomination for a delegation. Included is her Vitae.
No full textA letter from Sarita Jimenez to Dr. Hector P. Garcia, asking for his support in her nomination for a delegation. Included is her Vitae
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A letter from Javier Jimenez-Ugarte to Dr. Hector P. Garcia, informing him that he won't be able to attend the Founder's Freedom Banquet.
No full textA letter from Javier Jimenez-Ugarte, Ambassador at the Houston Consulate of Spain, to Dr. Hector P. Garcia, informing him that he won't be able to attend the Founder's Freedom Banquet
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Left to Right - 44th Annual Scholarship Banquet. Dr. Hector P. Garcia, Mr. & Mrs. Nick Jimenez guest from the Caller-Times (photograph)
No full textLeft to Right - 44th Annual Scholarship Banquet. Dr. Hector P. Garcia, Mr. & Mrs. Nick Jimenez guest from the Caller-Times
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Left to Right - 44th Annual Scholarship Banquet. Dr. Hector P. Garcia, Mr. & Mrs. Nick Jimenez guest from the Caller-Times (photograph)
No full textLeft to Right - 44th Annual Scholarship Banquet. Dr. Hector P. Garcia, Mr. & Mrs. Nick Jimenez guest from the Caller-Times
Distribution of follicle numbers in dairy cows aged from 2 to 11 years
No full textDistribution of follicle numbers in dairy cows aged from 2 to 11 years
F. Mossa1, S.Butler2, P.Duffy1, F. Jimenez-Krassel3, J Folger3, G.W. Smith3, P. Lonergan1, J.J. Ireland3, A.C.O. Evans1
1School of Agriculture Food Science and Veterinary Medicine, University College Dublin, Belfield, Dublin 4, Ireland, 2 Teagasc, Moorepark Dairy Research Centre, Fermoy, Co. Cork, Ireland, 3Department of Animal Science, Michigan State University, East Lasting, Michigan 48824,USA (E-mail [email protected])
Introduction. The number of antral follicles in cattle is highly repeatable in individuals, while being highly variable between animals (Burns et al., 2005; Ireland et al., 2007). Furthermore, a high antral follicle number is associated with a greater number of transferable embryos following superovulation (Singh et al, 2004; Ireland et al, 2007). However, the relation between age of the cow and follicle numbers has not been investigated. Furthermore, the ability to phenotypically classify cows with respect to follicle number based on a single rather than multiple ultrasound examinations would be desirable to rapidly identify cattle with high responsiveness to superovulation. The aim of this study was to investigate the accuracy of a single ultrasonographic examination, performed on a random day of the oestrous cycle, and to assess the variability in the number of follicles in dairy cows of different ages.
Materials and Methods. Transrectal ultrasonography was performed on 116 dairy cows, aged from 2.6 years to 10.8 years, to assess the number of ovarian follicles ≥3 mm in diameter on a random day of the oestrous cycle. Based on this scan, a subset of animals was selected as follows: cows with less than 15 antral follicles ≥3 mm in diameter (Low group n= 8) and those with more than 30 follicles≥3 mm in diameter (High group, n=10). Both groups were synchronized with 2 injections of PGF2α (Estrumate®, Loughrea, Co., Galway, Ireland) 11 days apart and the number of follicles ≥ 3 mm in diameter was counted daily during an entire oestrous cycle. The correlations between follicle number and animal age and between a single ultrasound examination and the maximal number of follicles during follicular waves were analyzed using ANOVA.
Results. Amongst the 116 animals, the number of antral follicles ≥3mm in diameter per animal ranged from 4 to 44, with a mean (±SEM) of 17.99±0.78 (Fig.1). Cow age was not related to the number of follicles detected on a random day of the oestrous cycle (R2 = 0.0086; P=0.31). Amongst the subsets of animals, the mean (±SEM) number of follicles was 35.9±1.50 in the High group and 8.13±0.71 in the Low group. No difference (P=0.89) was detected between the two groups in mean age (High=5.28±0.43 years, Low=5.38±0.62 years). Numbers of follicles at the initial random scan were highly correlated with the maximal number of follicles observed during follicular waves of a complete oestrous cycle (R2 =0.7756; P <0.0001).
Conclusion. The number of antral follicles in the ovaries of dairy cows is highly variable among cattle but apparently not linked with cow age. Cows with consistently high or low numbers of follicles can be reliably identified through transrectal ultrasonography performed on a single random day of the oestrous cycle
References.
Burns DS, Jimenez–Krassel F, Ireland J, Knight PG, Ireland JJ. Numbers of antral follicles during follicular waves in cattle: evidence for high variation among animals, very high repeatability in individuals, and an inverse association with serum-follicle-stimulating hormone concentrations. Biol. Reprod. 2005; 73:54-62.
Ireland JJ, Ward F, Jimenez-Krassel F, Ireland JLH, Smith GW, Lonergan P, Evans ACO. Follicle numbers are highly repeatable within animal but inversely correlated with FSH concentrations and the proportion of good quality embryos after superstimulation in cattle. Human Reprod. 2007 in press.
Singh J, Dominguez M, Jaiswal R, Adams GP. A simple ultrasound test to predict the superstimulatory response in cattle. Theriogenology. 2004; 62: 227-243
Antonio Nuñez Jimenez (1923-1998)
No full textSalomon Jean-Noël. Antonio Nuñez Jimenez (1923-1998). In: Karstologia : revue de karstologie et de spéléologie physique, n°32, 2e semestre 1998. Grottes ornées de Bornéo (E Kalimantan) et Grotte de Blue Lagoon (Afrique du Sud) p. 63
Novel Biochemical Signatures of Early Stages of Alzheimer's Disease
No full textBlankenstein, M.A. [Promotor]Scheltens, P. [Promotor]Teunissen, C.E. [Copromotor]Jimenez, C.R. [Copromotor
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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