初经

Abstract］ Objective To study the influence of eldly primiparae and pluriparas on pregnancy,deliery and prognosis.

目的 探讨高龄初产妇与高龄经产妇对妊娠、分娩及胎儿结局的影响。

Objective To study the influence of eldly primiparae and pluriparas on pregnancy,deliery and prognosis.

目的 探讨高龄初产妇与高龄经产妇对妊娠、分娩及胎儿结局的影响。

One L-isoleucine high-producing strain ISW330 with genetic marker was screened through shake tube primary screening, shake flask compound screening, genetic marker test and single clone isolation and continuous passage cultivation This strain could produce L-isoleucine 9.18g/L after fermentation under the fermentation condition without being optimized.

以黄色短杆菌HL41为出发菌株，通过硫酸二乙酯和紫外线诱变处理，经摇管初筛、摇瓶复筛、遗传标记验证、单菌落分离和连续传代，筛选出一株L-异亮氨酸生产菌株ISW330(Met~-+AEC~r+α-AB~r)。

One L-glutamic acid high-producing strain TN6319 with genetic maker (FEA~r+KMA~r+SG~r ) was screened through shake tube primary screening ,shake flask second screening,genetic marker test and single clone isolation and continuous passage cultibation.this strain could produce L-glutamic 72.9g/L after fermentation 42h under the fermentation without being optimized.

经摇管初筛、摇瓶复筛、遗传标记验证、单菌落分离和连续传代，最终筛选出一株L-谷氨酸高产菌TN6319(氟乙酸~r、酮基丙二酸~r、谷氨酰胺~r、磺胺胍~r)，该菌株在未优化条件下发酵42h产L-谷氨酸79.2g/L。

It indicated that dry heating reduced the pasting temperature , increased final viscosity ,storage moduli and yield stress of starch and xanthan gum mixtures .

结果显示：经黄原胶干热改性后的大米淀粉的糊化初温降低，终粘度升高，其淀粉凝胶的弹性模量G'，屈服应力显著升高。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐