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용준환 대한양계협회 1982 월간 양계 Vol.14 No.10
계사에 들어가서 눈이 따가울 정도면 그 계군의 생산성은 정상적인 것보다 10$\%$ 낮을 것이다. 계사내 환풍기 설치는 예방약 값의 절약, 생산성 향상을 위해 꼭 필요한 요소이다.
쥐 자궁평활근 수축에 대한 Bisphenol A 의 억제 효과
龍俊煥 동남보건대학 2002 論文集-東南保健大學 Vol.20 No.1
Bisphenol-A(BPA) is used to produce polymers for production of polycarbonate and epoxy resins that are used in food containers and dental appliances. BPA binds to estrogen receptors and induces estrogenic activity in a number of biological systems. The aim of this study was to determine the effects of BPA on uterine smooth muscle contraction of the rat. BPA(1 nM - 100 μM) and β-estradiol(10nM - 100 μM) produced an inhibitory effect on rat uterine strips contraction induced by high KC1(40 mM) in a concentration-dependent manner. The relaxant effect of BPA and 8-estradiol was similar. Also, the contractile effect of oxytocin(10 μM) and carbachol(10 μM) were inhibited by pretreatment with the BPA(10 μM). These results suggest that the relaxant effect of BPA could be related to the inhibition of calcium influx through voltage and ligand-dependent calcium channel.