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排序方式: 共有126条查询结果,搜索用时 15 毫秒
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Jung EY Lee BJ Yun YW Kang JK Baek IJ Jurg MY Lee YB Sohn HS Lee JY Kim KS Yu WJ Do JC Kim YC Nam SY 《The Journal of veterinary medical science / the Japanese Society of Veterinary Science》2004,66(11):1347-1354
Genistein, a soybean-originated isoflavone, is widely consumed by humans for putative beneficial health effects but its estrogenic activity may adversely affect the development of male reproductive system. Twenty one-day-old ICR mice weaned from dams fed with a soybean-based diet throughout gestation and lactation were exposed by gavage to genistein (2.5 mg/kg b.w./day) or 17beta-estradiol (7.5 microg/kg b.w./day) for five weeks. Corn oil was used as a negative control. The animals were fed with a casein-based AIN-76A diet throughout the experimental periods. There were no significant differences in body and organ weights of mice among experimental groups. No significant differences in sperm counts and sperm motile characteristics were found between control and genistein groups. Treatment of 17beta-estradiol caused a significant decrease in prostate weight and epididymal sperm counts compared to the control (p<0.05). The levels of phospholipid hydroxide glutathione peroxidase in the testis and prostate of mice exposed to genistein or 17beta-estradiol were significantly higher than that of the control mice (p<0.05). 17beta-estradiol treatment caused degeneration and apoptosis of germ cells in the testis, depletion and degeneration in the epididymal epithelium, and hyperplasia of mucosal fold region in the prostate of mice. Genistein treatment did not cause any lesion in the testis, epididymis, and prostate. These results suggest that dietary uptake of genistein during juvenile period may not affect male reproductive development and functions. 相似文献
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124.
Gap-Don Kim Hyun-Seok Lee Eun-Young Jung Hyun-Jung Lim Hyun-Woo Seo Young-Ho Lee Se-Heon Jang Seoung-Bong Baek Seon-Tea Joo Han-Sul Yang 《Livestock Science》2013,157(1):312-316
The aim of this study is to assess the effect of CO2 gas stunning which has not been conducted until now in comparison with captive bolt stunning on the meat quality of cattle. A total of 40 steers were slaughtered following two stunning processes: CO2 gas stunning (n=20), exposure at 70% CO2 gas atmosphere for 140 sec; and captive bolt stunning (CBS, n=20). The slaughtered steers were classified into Group A (620–710 kg) and Group B (720–790 kg) by their live weight. CO2 gas stunning decreases pH value (p<0.05) but increases lightness (p<0.001) and sarcomere length (p<0.001 and p<0.01 for Group A and Group B, respectively) in all live weight groups. Drip loss was increased with CO2 gas stunning in Group A (620–710 kg of live weight) (p<0.05), whereas WBSF was decreased with CO2 gas stunning in Group B (720–790 kg of live weight) (p<0.001). Therefore, CO2 gas stunning negatively affects muscle pH and water-holding capacity in steers but CO2 gas stunning can improve the tenderness and lightness compared with captive bolt stunning in cattle. 相似文献
125.
Dhungana Sanjeev K. Kim Hong-Sik Kang Beom-Kyu Seo Jeong-Hyun Kim Hyun-Tae Oh Jae-Hyeon Shin Sang-Ouk Baek In-Yeol 《Journal of Crop Science and Biotechnology》2021,24(1):83-91
Journal of Crop Science and Biotechnology - Flooding stress causes severe yield reduction in soybean worldwide. The development of stress-tolerant cultivars could be an effective measure to reduce... 相似文献
126.
Nelson CT Gao P Jokisaari JR Heikes C Adamo C Melville A Baek SH Folkman CM Winchester B Gu Y Liu Y Zhang K Wang E Li J Chen LQ Eom CB Schlom DG Pan X 《Science (New York, N.Y.)》2011,334(6058):968-971
The utility of ferroelectric materials stems from the ability to nucleate and move polarized domains using an electric field. To understand the mechanisms of polarization switching, structural characterization at the nanoscale is required. We used aberration-corrected transmission electron microscopy to follow the kinetics and dynamics of ferroelectric switching at millisecond temporal and subangstrom spatial resolution in an epitaxial bilayer of an antiferromagnetic ferroelectric (BiFeO(3)) on a ferromagnetic electrode (La(0.7)Sr(0.3)MnO(3)). We observed localized nucleation events at the electrode interface, domain wall pinning on point defects, and the formation of ferroelectric domains localized to the ferroelectric and ferromagnetic interface. These results show how defects and interfaces impede full ferroelectric switching of a thin film. 相似文献