The dissolution rates of various PVP-gossypol complexes in water at 37 degrees C were determined. The results showed that the presence of PVP in the complex enhanced the dissolution rate of gossypol in water greatly. In addition, the in vitro spermicidal activity on human semen, antifertility ...
Effect of plant density and nitrogen rates upon the leaf area of seed sugar beet on seed yield and quality Three-year field trials were set up on eutric brown soil in northwestern Croatia (Zagreb) with the objective to determine the effect of plant density and n... Pospisil,Rastija - 《...
PIP: Because of the high adolescent fertility rates in the US, the Alan Guttmacher Institute (AGI) conducted a 1985 study of adolescent pregnancy and child... EF Jones,JD Forrest,N Goldman,... - 《Family Planning Perspectives》 被引量: 516发表: 1985年 Helping teenagers postpone sexual invol...
At some point in human evolution, human females gained direct or indirect support from long-term relationships with particular males to help them parent and increase their fertility. As a result, a social system called the ‘family’ may have emerged where pairs of females and males raise ...
The profitability of the beef industry is directly influenced by the fertility rate and reproductive performance of both males and females, which can be improved through selective breeding. When performing genomic analyses, genetic markers located on the
The profitability of the beef industry is directly influenced by the fertility rate and reproductive performance of both males and females, which can be improved through selective breeding. When performing genomic analyses, genetic markers located on the
The objective of our study was to describe national rates of surgery for pelvic organ prolapse. We used the National Hospital Discharge Survey, a federal d... SH Boyles,AM Weber,L Meyn - 《American Journal of Obstetrics & Gynecology》 被引量: 1199发表: 2003年 Comparison of Levator Ani Musc...
We extend research on t... Ellison,G Christopher,Burr,... - 《Social Forces》 被引量: 121发表: 1997年 Ecological studies of antidepressant treatment and suicidal risks. correlational studies of temporal or regional trends in suicide rates and rates of usage of modern antidepressants including ...
The future growth rate depends, obviously, on fertility conditions and changes in death rates from year to year, but previous changes continue to make their effects felt for very long periods. Alfred Lotka, in the 1920s and 1930s, was the first to define the relationships between fertility, ...
This magazine publishes comparative studies on population dynamics, migration, family structure, fertility, and mortality rates. It aims to promote an understanding of the demographic characteristics and changes in different countries and regions, particularly through comparative analysis to explore the ...