Comparison of microbial communities in three different mine drainages and their bioleaching efficiencies to low grade of chalcopyrite

Microbial community diversities in the drainage from three mines(Dexing Copper Mine,Qibaoshan Copper Mine and Yaogangxian Tungsten Mine,China)were analyzed using 16S rDNA PCR-RFLP approach.The efficiencies of chalcopyrite bioleaching were compared using enrichment of the three cultures.Phylogenetic analysis indicates that the dominant microorganisms are clustered with the Proteobacteria,the remaining is affiliated with Nitrospira,Acidobacteria and Actinobacteria.At the genus level,Acidithiobacillus is the dominant group in both YTW and QBS samples,while Spingomonas is dominant in YGX sample.Moreover,the principal component analysis(PCA)reveals that QBS and YTW have similar geochemical character and microbial communities.The results also show that pH value and tungsten concentration play a key role in microbial community distribution and relative abundance.The bioleaching efficiency of the enrichment cultures from YTW and QBS is similar.After 15 d,the bioleaching rates of low grade chalcopyrite(0.99%)are both up to 99.5% when using 10 g/L pulp density due to the similar microbial composition of YTW and QBS.Moreover,the leaching efficiencies of enrichment cultures containing multiple bioleaching microorganisms are higher than that of pure culture Acidithiobacillus ferrooxidans.

Gas drainage technology of high gas and thick coal seam

Gas drainage in Jincheng Mining Group Co.,Ltd.was introduced briefly and theimportance of gas drainage in gas control was analyzed.Combined with coal-bed gas occurrenceand gas emission,the double system of gas drainage was optimized and a progressivegas drainage model was experimented on.For guaranteed drainage,excavationand mining and realization of safety production and reasonable exploitation of gas in coalseams,many drainage methods were adopted to solve the gas problem of the workingface.

淡定从容的人生更精彩 记北京工业大学青棕榈话剧团团长姚震

大学里经常会见到一种群体,那就是死读书的人,他们每天四点一线,教室,图书馆,食堂,宿舍,并且几乎是到哪里都是抱着书本,他们大致有两种结局,一是学有所成,满载证书而归,另一个就是身心疲惫还要失望而归。但是还有一种群体,他们每天乐呵呵,感觉什么都不在乎,事不关己的模样,用心的永远是别人永远也不能理解的事情,他们的结局是专业上成绩几乎是众失所望,但却在平时用心的方面众望所归,姚震就是属于这类群体中的一个。

关于“谢幕”这件事儿

舞台演出结束,有一个程序总是要完成的,那就是演员上台谢幕。谢幕是件很愉快的事,它标志着这场演出顺利结束,意味着辛苦了几个小时的演员们可以卸妆回家休息,也可以邀上三五好友小酌一番,放松身心。谢幕有各种方式,精彩演出之后谢幕也同样精彩才圆满,这就成了导演要费脑子精心安排的事情,于是我们看见了各种各样花招百出的谢幕,彬彬有礼的有之,

副市长写剧本

去年腊月的一个寒夜,有客人到我家来访。经介绍我认识了眼前那位中等身材、布满沧桑的脸上却又透出一股英气的中年人,他是春城昆明市主管文教的副市长马力同志。马力同志是为筹备第三届中国艺术节到北京开会来的。作为艺术节的常务副秘书长和昆明指挥部的常务副总指挥,眼下是他最忙的时候,他怎么会有空跑到一个陌生人家去作客呢?落座交谈之后我才知道,马力同志是来邀请我作为导演指导,去昆明市滇剧团排一出叫《南诏奉圣乐》的历史演义剧,而他自己竟然是这出戏的编剧之一。

奋进中的上昆导演沈斌

张芳先生在1989年《上海戏剧》第4期以剧坛上的“拼命三郎”为题,“侧记”了上昆导演沈斌在河南省周口地区豫剧团排《西湖公主》一剧的详尽始末。文章中对沈斌在排戏过程中的“着魔”情况,以“泥里滚,地里爬”,“忘记地球上还有昼夜之分”等生动语言,来形容这个刚刚进入中年的导演的拼命精神,终于排出了一个全省戏剧大赛中获得十一项奖的好戏,并在“晋京汇报”中,“轰动京华”。张芳的这篇文章,很能概括沈斌在导演工作上的整体风貌。沈斌今年42岁,担任上海昆剧团的专职导演,1986年曾入中国戏曲学院读书。早在1978年以至更早的1969到1971之间。

振兴话剧的战略设想

此文曾以《振兴话剧断想》为题,发表于去年12月10日《人民日报》,本刊发表时作者对题目及内容都有所改动。

欢欢喜喜过大年

新年到,新年到,穿新衣,戴新帽,小朋友们哈哈笑……日子过得真快,转眼又迎来了2015年的春节。喜庆团圆的日子里,我们为宝宝精心准备了4款赏心悦目、好吃美味的节日＂大餐＂,希望宝贝们大饱口福,过一个＂香喷喷＂的春节!蒸蒸日上（小猪馒头）材料面粉250g、牛奶100g、酵母2g、温水25g、红曲粉2g、黑芝麻适量做法1红曲粉放入50g面粉中拌匀,酵母用温水化开分别加入两种面粉中拌匀后。