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搜索结果: 1-15 共查到农学 LH相关记录31条 . 查询时间(0.062 秒)
Global Navigation Satellite System Reflectometry (GNSS-R) is based on the concept of receiving GPS signals reflected by the ground using a passive receiver. The receiver can be on the ground or instal...
The study is aimed at the investigation of the effects of GnRH agonist (alarelin) immunization on the vaginal electrical resistance (VER) and secretion of FSH and LH in sheep. Forty-two prepubertal fe...
The effects of Aroclor 1254 on the secretion of luteinizing hormone (LH) and 17,20β-dihydroxy-4-pregnen-3-one (17,20β-P) in female Prussian carp (Carassius gibelio Bloch) at the time of their natural ...
Dispersed cells from sexually immature carp (footlings) pituitaries were exposed to estradiol (E2) or testosterone (T) (both at 3 × 10–8 M) in the presence of opioid receptor antagonist naltrexone (10...
The aim of this study was to evaluate the effects of recombinant human inhibin A, recombinant human activin A and desteroidized ovarian extract on LH secretion in vitro and in vivo in female common ca...
Fadrozole – a non-steroidal aromatase inhibitor was applied to common carp and goldfish to examine its ability to potentiate the stimulatory action of GnRH analogues on LH secretion in vivo. The goal ...
采用半静水法进行了南海原油和0#柴油对凡纳滨对虾(Litopenaeus vannamei)、翡翠贻贝(Perna viridis)和菲律宾蛤仔(Ruditapes philippinarum)的急性毒性试验。南海LH原油乳化液、0#柴油乳化液和0#柴油分散液对凡纳滨对虾的96 h半致死安全质量浓度(LC50)分别为3.25 mg•L-1、3.17 mg•L-1和 2.40...
The aim of this study was to evaluate the effect of intrafollicular treatment (IFT) with different doses of luteinising hormone. Experimental heifers were treated with a single deslorelin implant to d...
The corpus luteum (CL), formed from the ruptured follicle, is required for the course of normal cyclicity and the duration of pregnancy in females. The influence of a mixture of polychlorinated biphen...
为了探明促卵泡素(Follicle stimulating hormone,FSH)和促黄体素(Luteinizing hormone,LH)对体外培养的牦牛卵泡颗粒细胞凋亡及甾体激素分泌的影响,揭示促性腺激素调控卵泡发育的机理,采用细胞培养和显微观察技术,建立了牦牛卵泡颗粒细胞体外培养体系,观察分析牦牛卵泡颗粒细胞体外培养的生长特征和凋亡的形态特征;采用流式细胞技术(Flow cytometry...
利用 cDNA 末端快速克隆(Rapid Amplification of cDNA Ends, RACE)方法获得了漠斑牙鲆 (Paralichthys lethostigma)促黄体素(Luteinizing Hormone, LH) β亚基的 cDNA 全长序列,检测了 LH β亚基 mRNA 的组织表达水平,揭示了垂体、肝脏和卵巢中 LHβ亚基 mRNA 在卵巢发育周期中 的表达水平...
为揭示LH/hCG受体和cAMP在玉米赤霉烯酮(ZEN)抑制小鼠睾丸间质细胞(leydig cells)分泌睾酮中的作用,本研究以原代培养的小鼠Leydig细胞为材料,用ELISA法分别测定ZEN暴露浓度为0、1、5、10、20 μg·mL-1及暴露时间为1、6、12、24 h时睾酮的分泌量(hCG环境及cAMP环境)和胞质内cAMP水平(hCG环境),用化学发光标记免疫分析法(CLIA)测定其细...
为进行GnRH脉冲模式对FSH分泌影响的研究,并分析LH对GnRH脉冲应答的特点。用GnRH 以不同的脉冲振幅,不同的频率对GTH细胞进行刺激后,检测LH的24 h 分泌量。结果表明,LH的24 h 分泌量,以频率为30 min,振幅20 nM时的GnRH脉冲模式为最高,并且随着GnRH刺激频率的增快或 减慢,LH的分泌量都呈逐渐减少趋势。所以,GnRH脉冲频率本身就是一个调控信号,不同脉冲...
It has been shown that orexin has an inhibitory effect on gonadotropin secretions in non-ruminant animals. The goal of this study was to determine whether orexin affects LH, and FSH secretions in the ...
【目的】研究单色光对外周血LH和FSH含量的影响,为阐明单色光对蛋鸡产蛋性能的作用机理提供科学依据。【方法】采用红、绿、蓝三种发光二级管和白炽灯,对蛋鸡进行光照,试验期19~53周龄,光强度15 lx,光照时间16h。【结果】25~34周龄段,蓝光组血清LH 和FSH值上升维持时间最长,峰值出现最晚。37~49周龄段,白光组LH值一直高于其它组,而40~49周龄,红光组LH和FSH值持续上升。在2...

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