نتایج جستجو برای: reproductive values

تعداد نتایج: 598609  

2015
Kelly A Chiles Peter N Schlegel

Although abnormal semen parameters are generally considered to be poor predictors of fertility, Semen Analysis (SA) parameters are often used as a screening test to detect male factor infertility. Certainly, men with azoospermia or severe oligozoospermia have markedly impaired fertility potential [1-3]. Since men with abnormal fertility could undergo various medical or surgical treatments to im...

2017
JM Chapel R Muiño V Pereira C Castillo J Hernández JL Benedito

Received: Revised: Accepted: Published online: September 16, 2016 January 05, 2017 February 04, 2017 March 11, 2017 Body condition score (BCS) changes and non-esterified fatty acids (NEFA) are good indicators for measuring lipomobilization during the transition period. The aim of this study was to establish the possible correlation between cows with a higher BCS during this period and their rep...

Journal: :Proceedings. Biological sciences 2006
Rafael L Rodríguez Karthik Ramaswamy Reginald B Cocroft

Mate choice is considered an important influence in the evolution of mating signals and other sexual traits, and--since divergence in sexual traits causes reproductive isolation--it can be an agent of population divergence. The importance of mate choice in signal evolution can be evaluated by comparing male signal traits with female preference functions, taking into account the shape and streng...

Journal: :Bulletin of mathematical biology 2008
Nakul Chitnis James M Hyman Jim M Cushing

We perform sensitivity analyses on a mathematical model of malaria transmission to determine the relative importance of model parameters to disease transmission and prevalence. We compile two sets of baseline parameter values: one for areas of high transmission and one for low transmission. We compute sensitivity indices of the reproductive number (which measures initial disease transmission) a...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس 1380

مقاومت 27 رقم کلزا ‏‎(brassica napus l.)‎‏ و گونه خردل وحشی ‏‎(sinapis arvensis)‎‏ به شته مومی کلم ‏‎(brevicoryne brassicae l.)‎‏ طی سالهای 80-79 در شرایط مزرعه و اتاق رشد مورد بررسی قرار گرفت. در شرایط مزرعه آلودگی به صورت طبیعی بود. شاخص آلودگی که معیار مقایسه مقاومت ارقام بود به صورت حاصلضرب ((میانگین طول ساقه آلوده)) در ((درصد گیاهان آلوده)) برای هر رقم محاسبه گردید. با مقایسه داده های نرما...

Journal: :Journal of animal science 1989
B A Smith J S Brinks G V Richardson

Reproductive and growth data were obtained on 779 and 564 yearling beef heifers and bulls, respectively, that had sires with yearling scrotal circumference data at the San Juan Basin Research Center, Hesperus, CO. Partial regression coefficients of reproductive and growth traits on inbreeding (FXC) and age of the individual and adjusted scrotal circumference of sire (SCSI) were obtained. Growth...

2017
Alice S. Rhoton-Vlasak Kay Roussos-Ross Girard M. Cua Erica L. Odera Tracy A. Irani Terrie Vasilopoulos

OBJECTIVE To explore awareness of the reproductive versus the medical risks of obesity in a medical and non-medical college educated population. METHODS An exploratory prospective research design was used. A 26-question online survey was developed and offered to a sample of medical students/residents (n=325) and non-medical college students (n=102). The data were analyzed using Graph Pad soft...

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