农杆菌介导的转高赖氨酸蛋白基因（sb401）水稻T4代分析

通过农杆菌介导的方法用富赖氨酸蛋白基因（sb401）转化粳稻品种日本晴,获得了独立的10个转化株系,对转化株系进行连续自交,通过筛选得到9个纯合的T4代转化株系。 Southern blotting分析发现,整合位点是随机的,并为低拷贝（1~3个）。TAI-PCR扩增得到8个T-DNA侧翼序列,并定位于日本晴的7条染色体上。蛋白质和氨基酸测定分析发现,sb401基因对各株系的蛋白质、赖氨酸和其他氨基酸组分的提高起到了一定的作用。将杂交结果与T-DNA插入位置结合分析发现,在低拷贝的情况下,表达量的差异不明显。     

双向水平地震作用下非对称框架结构抗震分析简化方法

采用刚性楼板假定,取各个楼面的质量中心在x,y方向的位移与绕z轴的转角作为自由度,将非对称空间框架结构简化为串刚片模型.将空间框架按两个正交方向划分为若干平面框架子结构,求得这些平面框架子结构的刚度矩阵后将其缩聚,再应用直接刚度法形成整体结构的刚度矩阵.该方法同时考虑了结构的扭转耦合及梁柱节点的弯曲转动.最后,通过一个结构的模态分析与弹性时程分析,比较了按本文方法与用ansys按空间有限元方法计算的结果,两者相符良好.故本文方法可用于非对称框架结构的抗震分析与设计.     

Forming process of asymmetric wall forging

Asymmetric wall products are widely used in the engineering. However, there are many limitations in the traditional forming processes employed to produce them. Oil pump stator has been studied as an instance to present the forming process of asymmetric wall products. First, a theoretical analysis of the forging's forming process has been made. Second, a rigid-visco-plastic finite element model of oil pump stator has been constructed and three dimensions FEM simulation and analyzing of extruding process have been taken by employing the simulation software. At last, parameters of the forming process have been optimized, the rule of forging's metal flow in the forming process has been analyzed and some distributions of stress and strain have been offered. These data can be use to direct the production of the other asymmetric wall forgings.     

Analysis of Adverse Selection in the Credit Market and the Impact of Mortgage Means

From the impact of mortgage loan on the degreeof investment risk and the expected profit of bank,the authors draw the conclusion that the risk of mortgage loan is larger than the risk of credit loan when the gage is not enough by comparing mortgage loan with credit loan. And they also analyse the relation of the gage, loan rate, and adverse selection. The gage and loan rate are presented which can be use as themeans of examining information for the bank.     

Asymmetric Exhaustive Service Polling System with Bernoulli Feedback

This paper studies asymmetric exhaustive service polling system with Bernoulli feedback,gives the distributions of queue lengths and sojoun times,and obtains some other results,in stationary condition.     

Revelation Game of the Private Information Under Asymmetric Information

Because of the existence of the private information, the informed trader can make excess payoffs by using the information advantages. And also the informed trader can choose the trade strategies to attain the up most excess payoffs. However, he may lose his information advantages. This paper analyzes the conditions when the informed trader can make use of the private information and its optimal times underlying the framework of the strategic market game.     

An Analysis of Principal-Agent of Game under the Asymmetric Information in Venture Capital

The relationship of investors and venture capitalists is an important part in venture capital. Based on asymmetric information, this paper analyzes the principal agent relationship between investors and venture capitalists with game theory. And this paper mainly discusses the choosing, controlling and incentive problem. It suggests that only the capable and self confident venture capitalists could accept the terms of the limited partnership. It also indicates that recompense mechanism which holds the interest of investors and that of venture capitalists tightly is the center of the limited partnership. Rate of yield is the key of recompense mechanism, it not only reflects the incentive on venture capitalists, also reflects the share of risk between investors and venture capitalists. At last, the market credit play an important role in venture capital.     

CORRECTION OF ANGULAR DEFORMITY BY ASYMMETRIC PHYSEAL GROWTH AND BONE REMODELLING

Angular deformities of 25 or 37 degrees valgus were created by transverse wedge osteotomies in the diaphysis of the radius in 3-month-old Cocker Spaniels. Spontaneous correction was judged from radiographs until skeletal maturity. The magnitude of correction was estimated, using the opposite normal leg as a control. Asymmetrical physeal growth corrected the induced angulation between the proximal and distal radial joint plane surfaces (joint plane angle). The average correction of the joint plane angle was 80% in the 25 degree group, and 72% in the 37 degree group. Bone remodeling of the radial shaft corrected the induced diaphyseal angulation by 50% in both groups during the study.     

Asymmetric warming effects on N dynamics and productivity in rice (Oryza sativa L.)

Climate warming exhibits strong diurnal variations, with higher warming rates being observed at nighttime, which significantly affects rice (Oryza sativa L.) growth and grain yield. The objective of this study was to determine the effects of asymmetric warming (all-day warming, AW; daytime warming from 07:00 to 19:00, DW; nighttime warming from 19:00 to 07:00, NW, and a control, CK) on rice nitrogen (N) dynamics and productivity. Two rice bucket warming experiments were performed in Nanjing in Jiangsu Province, China, using the free air temperature increase (FATI) technique. The daily mean temperatures in the rice canopy in the AW, DW and NW plots were 2.0, 1.1 and 1.3ºC higher than those in the rice canopy in the CK plots, respectively. The results indicated that the total N accumulation of rice was 8.27–40.53% higher in the warming treatment than in the control during the jointing, anthesis and maturity stages. However, there was no significant difference detected among the three warming treatments. The warming treatment substantially decreased N translocation efficiency, leading to the retention of more N in the plant stems during grain filling. The warming treatment also decreased the N harvest index, N utilization efficiency based on grain yield and N utilization efficiencies based on biomass in both growing seasons. The warming treatment significantly increased the aboveground biomass (9.26–16.18%) in the jointing stage but decreased it (2.75–9.63%) in the maturity stage. Although DW increased the carbon (C) gain by photosynthesis and NW increased the C loss by night respiration, the daytime higher-temperature treatment affected rice photosynthesis and reduced its photosynthetic rate and product. This effect may be one of the primary reasons for the insignificant difference in the aboveground biomass between the DW and NW treatments. In the AW, DW and NW plots, the grain yield was reduced by an average of 10.07, 5.05 and 7.89%, respectively, across both years. The effective panicles and grains per spike tended to decrease in the warmed plots, whereas irregular changes in the 1000-grain weight were observed. Our results suggest that under the anticipated climate warming, rice productivity would further decline in the Yangtze River Basin.     

紫色非硫光合细菌(PNSB)菌株C细胞的不对称分裂和内光合膜的结构

从室温下存放2 年以上的紫色非硫光合细菌的培养液中分离出PNSB菌株C。对该菌株的生物学特性、内光合膜结构和细胞的不对称分裂方式进行了研究。菌株C细胞中含有细菌叶绿素a。具有层状并与细胞质膜平行的内光合膜系统。细胞横切面显示内光合膜系统呈环形复瓦状结构。细胞纵横切面显示内光合膜是一完全的整体。菌株C以细胞的不对称分裂方式进行繁殖, 并以细胞的缢缩完成分裂。据此, 菌株C被鉴定为红假单胞菌属 (Rhodopseudom onas) 的成员。