高产

A method to synthsis a - methylene - r - butyrolactones was reported by the substituted (a - carbethoxyvinyl) cuprate intermediates, generated by the addition of higer order cuprate to acetylenic ester,traping with epoxides stereoselectively.

本文报道了通过以高序铜代替低序铜对炔酸酯加成得到的取代铜与端基或环状环氧化合物的立体选择性反应，较高产率的合成α，β-取代烯酯，进而可合成α-亚烷基-γ-丁内酯类衍生物。

The experiment was conducted to study the differences of quantity and quality of Achyranthes bidentata under different sowing time.

［目的］研究不同播期条件下怀牛膝的产量和品质差异，为怀牛膝高产优质栽培提供理论依据和技术支持。

An aciduric mutant with steady hydrogen-producing capability, which was able to grow at acidic pH of 3.0, was obtained. Its capability of hydrogen production was measured in the batch culture experiment.

结果筛选到一株遗传性状稳定的高产氢突变株，具有良好的耐酸性，在pH值3.0时仍能生长。

Enterobacter aerogenes was irradiated by He-Ne laser to optimize the laser mutagenesis condition, and to test the heredity, aciduric and hydrogen-producing potential of the mutant. An aciduric mutant with steady hydrogen-producing capability, which was able to grow at acidic pH of 3.0, was obtained. Its capability of hydrogen production was measured in the batch culture experiment.

闻建平，陈宇，刘铭辉(天津大学化工学院生物工程系，天津300072)摘要：运用He—Ne激光辐照产气肠杆菌，对激光诱变参数进行优化，考察了突变株的遗传稳定性、耐酸性和产氢特性结果筛选到一株遗传性状稳定的高产氢突变株，具有良好的耐酸性，在pH值3.0 时仍能生长。

Acridone 1 reacted with benzyl chlorides 2 in NaH/DMF/KI to give 10-benzyl-9-acridones 3 in high yields. Subsequent reduction of 3 with NaBH4 gave 10-benzy1-9,10-dihydroacridine derivatives 4 with yields of 88%～96%.

吖啶酮1与氯化苄及其衍生物2在氢化钠/N，N-二甲基甲酰胺/碘化钾中反应高产率生成10-苄基吖啶酮类化合物3； 3经硼氢化钠氢化还原生成10-苄基-9，10-二氢吖啶类化合物4，产率88%～96%。

A mutant,designated as UV-3,was selected from wild-type Enterobacter aerogenes 10293 by application of UV irradiation in combination with cultivation in high glucose medium,leucine medium and diacetyl medium.

以产气肠杆菌(Enterobacter aerogenes，CICC 10293)为出发菌株，采用紫外线诱变，并结合亮氨酸平皿和丁二酮平皿筛选方法，获得耐高浓度底物-葡萄糖的高产丁二酮突变菌株，命名为UV-3。

The common goal desired in development of agronomic systems is higher crop production.

高产是农学发展上普遍期望的目标。

Problems still exist for large-scale industrial production presently, new type of amaryllidaceae with high production capability of galanthamine should be developed and planted in large scale, biologic technology should also be applied to simplify the synthetic process and reduce cost.

认为目前工业化大规模生产尚存在问题，应运用生物技术手段，开发高产加兰他敏的石蒜品种，同时开展大规模种植；简化合成生产工艺、降低成本。

The isolated bacterial strain BT-13 had good capability to biotransform trans-anethole to anisic acid.

结果筛选到一株细菌菌株BT-13能以茴油为碳源高产茴香酸。

The research aimed to study the fermentation of high arachidonic acid-producing mutant and the mycelium aging.

［目的］研究花生四烯酸高产突变株的发酵及菌丝老化特性。

And Pharaoh spoke to Joseph, saying, Your father and your brothers have come to you.

47：5 法老对约瑟说，你父亲和你弟兄们到你这里来了。

Additionally, the approximate flattening of surface strip using lines linking midpoints on perpendicular lines between geodesic curves and the unconditional extreme value method are discussed.

提出了用测地线方程、曲面上两点间短程线来计算膜结构曲面测地线的方法，同时，采用测地线间垂线的中点连线和用无约束极值法进行空间条状曲面近似展开的分析。