诱变

After treated by ultraviolet and EMS, a mutant M2-4-4 was produced from Cytophaga MCA-2, with a higher enzyme activity of 66U/ml.

经过多次富集和反复筛选，从海洋环境中筛选到69株具有卡拉胶降解活性的菌株，以产酶活力高、生物学性状优良的MCA-2菌株为出发菌株，进行复合诱变和自然选育，获得了一株酶活显著提高的突变株M2-4-4，发酵液产酶活力达到66U/ml。

In the study, physical and chemical mutagenesis and protoplast fusion technique were used to select strains with low-yielding diacetyl, acetaldehyde, total higher alcohols and other excellent characteristics.

本研究采用物理化学诱变和原生质体融合的方法，选育具有低产双乙酰、乙醛和总高级醇等优良特性的啤酒酿造酵母菌株。

Methods Five different ultraviolet absorption components were isolated from the filtrate of Botrytis cinerea isolate 7–3 culture. Of the five components, one showed strong inhibitory to Digitaria sanguinalis.

在前期薄层层析法、柱层析法和高效液相色谱法分析的基础上对灰葡萄孢诱变菌株BC7–3的代谢产物中具有除草活性的5个不同组分分别进行了液相色谱制备。

The concentrations and treatment time of EMS was related closely with the injury degree on the embryogenic callus.

在化学诱变剂 EMS对木薯胚性愈伤组织的处理中，EMS的浓度与处理时间对愈伤组织损伤程度有很大影响。

Low energy ion implantation technology was used in mutation breeding of Hericium erinaceus.The growth speed of the Hericium erinaceus hypha is as an index to study the influence of the pulse lasting time of N~+ ion implantation.

利用低能离子束生物技术对猴头菌进行诱变选育，通过分析N+离子注入后猴头菌丝体的生长速度，研究脉冲时间对N+离子注入猴头菌丝体的影响。

Antifungal antibiotic ; mutagensis ; resistance of self secondary metabolites ; fermentive conditions

抗真菌抗生素；诱变；自身次生代谢产物抗性；发酵条件

The results showed that all contents were lower in male sterilie anthers than in fertilisable ones.With anther developing,the contents of soluble starch,protein and free proline increased obviously in male fertilizable anthers,but not in sterile ones.

结果表明：太空诱变处理玉米核不育材料的可育株花药中的可溶性糖、淀粉、蛋白质以及游离脯氨酸含量均高于不育株花药的，且可育株花药中的可溶性淀粉、蛋白质和脯氨酸含量都随着花药的发育逐渐累积，在不育株花药中这些指标的变化不明显。

The contents of soluble sugar , starch , protein and free praline in anthers were analyzed and compared between male fertilizable and male sterilie induced by space flight at different developmental stages .

为探讨太空诱变处理玉米核不育材料的可育株，不育株花药的生理生化特性差异，对可育，不育材料不同发育时期花药的可溶性糖，可溶性淀粉，蛋白质含量以及游离脯氨酸含量进行了测定。

A Flavobacterium, were selected. These two strains were used as starting strains fo...

采用~(60)Co—r射线诱变，选育出了降解能力获进一步提高的优良菌株。

The results showed that the total amount of photosynthetic pigments in space flighted seedlings were lower due to significant reduction of chlorophyll a+b content .

因而近年来植物空间诱变的研究十分踊跃，但研究对象多集中于农作物和蔬菜，花卉植物的报道极少，且研究工作多集中在田间观察、形态学等内容[5] 。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。