日本沼虾卵巢发育特征及其蛋白质的变化

报道了日本沼虾卵巢发育特征及其卵巢发育过程中蛋白质的变化.日本沼虾在发育过程中,卵母细胞体积逐渐增大,其干物质含量随卵巢发育成熟而增加;凝胶电泳发现卵巢在不同的发育时期,蛋白质的种类有明显的不同.     

A STAGE-STRUCTURED SI ECO-EPIDEMIOLOGICAL MODEL WITH TIME DELAY AND IMPULSIVE CONTROLLING*

This paper formulates a robust stage-structured SI eco-epidemiological model with periodic constant pulse releasing of infectious pests with pathogens. The authors show that the conditions for global attractivity of the ＇pest-eradication＇ periodic solution and permanence of the system depend on time delay, hence, the authors call it ＂profitless＂. Further, the authors present a pest management strategy in which the pest population is kept under the economic threshold level （ETL） when the pest population is uniformly persistent. By numerical analysis, the authors also show that constant maturation time delay for the susceptible pests and pulse releasing of the infectious pests can bring obvious effects on the dynamics of system.     

In vitro inhibition by dopamine of 5-hydroxytryptamine-stimulated ovarian maturation in the red swamp crayfish,Procambarus clarkii

Dopamine inhibits 5-hydroxytryptamine-stimulated maturation of the ovaries of the red swamp crayfish,Procambarus clarkii, in vitro just as it does in vivo. This in vitro inhibition appears to be due to inhibition of release of the gonad-stimulating hormone from the brain and thoracic ganglia. However, it is possible that in vivo dopamine also triggers release of the gonad-inhibiting hormone.     

白蜡虫雌性生殖系统的形态和结构的研究

白蜡虫雌性生殖系统由卵巢,一、二级分枝输卵管,侧输卵管、中输卵管、副性腺和受精囊组成.卵巢管属端滋式,由二级输卵管分化形成.营养腔内有3个滋养细胞,卵室内一个卵母细胞,每条卵巢管只形成一个卵.受精囊一个,圆球形.副性腺两对.     

女性内分泌调节轴功能及调控

女性月经周期的形成和周期的调节是一个复杂的机制，是由下丘脑－垂体－卵巢轴系统通过神经内分泌活动实现的。表现为卵泡成熟释放、雌激素的形成及子宫内膜有规律的增殖－分泌－脱落。从理论上阐述了上述机制，从而为不孕症、功血、闭经等疾病诊断治疗提供了理论基础。     

IT系统运维中的知识转移研究

IT系统运维是IT系统建设中的重要的一环,在借鉴其他领域知识转移相关理论和成果的基础上结合IT系统运维的特点,利用知识位势、知识成熟度模型、博弈论等相关理论和方法对IT系统运维组织内外的知识转移进行了研究,提出了IT系统运维组织内外知识转移模型以及成熟知识和不成熟知识的转移策略。     

黑线仓鼠卵巢单纯性囊肿五例

从1995年10月到1996年2月解剖了我院饲养的(?)黑线仓鼠共182只,首次发现了5例患卵巢单纯性囊肿的地鼠(其中1例右卵巢为单纯性囊肿;左卵巢兼患浆液性囊腺瘤).据国外报道:黑线仓鼠自发性肿瘤的发生率低,主要累及肝脏和生殖器官(而只有子宫内膜腺癌的报道),并记载黑线仓鼠当受到放射性辐照才有患卵巢肿瘤的.到目前为止,国内外尚无黑线仓鼠卵巢单纯性囊肿的报道.     

Long-term changes in tyrosine phosphorylation of the abundant nuclear proteins during granulocytic differentiation of HL-60 cells

The two-dimensional electrophoretic patterns of nuclear proteins and their tyrosine phosphorylation were compared for HL-60 cells before and after differentiation induction to granulocytes by dimethyl sulfoxide, all-trans retinoic acid and N ⁶,O ²-dibutyryl adenosine 3′5′-cyclic monophosphate. Regardless of the inducer used, some nuclear proteins, which are tyrosine-phosphorylated in proliferating HL-60 cells, undergo gradual dephosphorylation 12–72 h after induction of differentiation, followed by drastic dephosphorylation during maturation to granulocytes. At least 13 nuclear proteins with a molecular mass of 35–110 kDa are dephosphorylated, and 6 nuclear proteins undergo tyrosine phosphorylation. Analysis of the nuclear proteins differentially extracted by salt and detergents indicates that changes in their tyrosine phosphorylation during the maturation stage of differentiating granulocytes occur mainly in proteins which are abundant in nucleoplasm, chromatin and residual nuclear structures. The abundance of these proteins, residing in the nuclear structures, and their long-term modification in phosphorylation during the maturation stages of differentiation strongly suggest that tyrosine phosphorylation of these proteins is involved in reorganization of the differentiating cell nucleus. Received 21 September 1998; received after revision 24 November 1998; accepted 3 December 1998     

凡纳滨对虾亲虾驯养、促熟、产卵及无节幼体培育

在水温27±2℃,盐度29±2;pH8.0~8.5,光强1 000 1x的条件下,对来自我国台湾的1 300对规格为35~45 g/尾的凡纳滨对虾亲虾进行为期73 d的驯养、促熟、产卵及无节幼体培育试验.结果表明,整个试验过程中,亲虾平均存活率为99.458%,波动区间[99.583%,99.333%],日产卵亲虾比例平均为3.506%,波动区间[3.89%,3.123%],雌虾单尾次日产无节幼体数量平均为18.928%,波动区间[19.691%,18.164%].无节幼体的日产量随繁殖驯养的延长,呈渐渐上升态势,从240万尾(第21天)至2 135万尾(第54天)平均为1 323万尾.此外,试验发现近成熟的雌虾也能接受交配行为.