浅谈对13281工作面的瓦斯综合治理

本文介绍了低瓦斯矿井综采工作面上隅角瓦斯超限原因,通过筑建隔离煤墙、局部通风机抽排等综合治理措施,有效地解决了上隅角瓦斯超限问题。     

人参花粉植株的诱导及体细胞无性系的建立

人参花药培养已连续四年(1981—1984年)得到了花粉植株,并建立了体细胞无性系。人参花药对培养基的适应较广,在MS等6种基本培养基上都得到了愈伤组织;低温预处理能明显提高诱导效果;已筛选出愈伤组织诱导率高的培养基配方,再生植株的分化比较困难,在100多种分化培养基配方中筛选出16种能分化再生植株的配方,分化率高的可达6.8％。经二年多16次继代培养,建立了能保持良好分化能力的体细胞无性系。     

In vitro POLLEN PLANT INDUCTION AND EMBRYOID CLONE ESTABLISHMENT OF Panax ginseng

In anther culture of Panax ginseng, its callus formation showed a wide adaptability to culture media. Large numbers of calli were induced on media exhibiting better effects of induction. Supplemeres of 5 mg 2,4-D/1 and 1 mg KT/1 to the media proved to be much effective. Regeneration of the whole plantlets from anther culture of Panax ginseng is usually quite difficult. During the past three years, however, sixteen of the 100 medium formulae tested were proved to be suitable. The formulae of MS+0.5 mg BA/1+2 mg GA/1+1000 mg LH/1+3％ sucrose were considered good and effective. A visibly differentiated body, which was light-milky white and later turned into a light green spot, was formed 40 days after the callus was transferred to the differentiation media. This body differentiated subsequently into buds, roots and, eventually, seedlings. The embryoid clones have been established in order to maintain its ability of continual differentiation into plantlets through successive culturings of many generations.