The widely use of atrazine causes great threat to the environment.Microbial degradation is an effective method to quickly remove atrazine to maintain environmental safety.A bacterial strain,ZF1,capable of highly degra...The widely use of atrazine causes great threat to the environment.Microbial degradation is an effective method to quickly remove atrazine to maintain environmental safety.A bacterial strain,ZF1,capable of highly degrading atrazine which could grow with atrazine as both carbon and nitrogen sources,was isolated from the wheat field soil in Henan Province,China.Phenotypic characterization and 16S rRNA gene sequencing indicated that the isolate belonged to the Paenarthrobacter ureafaciens.Polymerase chain reaction(PCR)analysis revealed that ZF1 contained the atrazine-degrading genes trzN,atzB and atzC.The growth and atrazinedegradation efficiency of strain ZF1 had broad ranges of temperature(5℃-50℃)and pH(5.0-11.0),and had a high tolerance to atrazine and could tolerate at least 1500 mg·L^(-1).The addition of carbon and nitrogen sources promoted the degradation rate of atrazine to a certain extent.When the strain was cultured with starch as carbon sources,the degradation rate of atrazine could reach 50 mg·L^(-1)·h^(-1).In general,the discovery of strain ZF1 enriched the resources of atrazine degrading strains.Its excellent biodegradability and environmental tolerance showed that strain ZF1 had great potential in the bioremediation of atrazine contaminated sites in the future.展开更多
“Less is more”,表面上看这是“更少的即是更多的”的意思。于笔者看来,这应是一个很有意境的词语,粗俗的“少即是多”的理解是相当缺乏表述力与意境的。当然,对于“Less is more”,可以从哲学的宏观与微观等许许多多的角度去理解它。...“Less is more”,表面上看这是“更少的即是更多的”的意思。于笔者看来,这应是一个很有意境的词语,粗俗的“少即是多”的理解是相当缺乏表述力与意境的。当然,对于“Less is more”,可以从哲学的宏观与微观等许许多多的角度去理解它。在Simplex团队这里,“Less is more”首先是Simplex团队对汽车改装文化的态度,继而是由车延伸至生活的一种态度。有人会说“Less is more”充斥着难以理解的文艺范儿？那不妨由Simplex的Honda CR-Z来告诉你,Simplex的Less is more是怎样的。展开更多
基金Heilongjiang Provincial National Science Foundation(LH2020C007)。
文摘The widely use of atrazine causes great threat to the environment.Microbial degradation is an effective method to quickly remove atrazine to maintain environmental safety.A bacterial strain,ZF1,capable of highly degrading atrazine which could grow with atrazine as both carbon and nitrogen sources,was isolated from the wheat field soil in Henan Province,China.Phenotypic characterization and 16S rRNA gene sequencing indicated that the isolate belonged to the Paenarthrobacter ureafaciens.Polymerase chain reaction(PCR)analysis revealed that ZF1 contained the atrazine-degrading genes trzN,atzB and atzC.The growth and atrazinedegradation efficiency of strain ZF1 had broad ranges of temperature(5℃-50℃)and pH(5.0-11.0),and had a high tolerance to atrazine and could tolerate at least 1500 mg·L^(-1).The addition of carbon and nitrogen sources promoted the degradation rate of atrazine to a certain extent.When the strain was cultured with starch as carbon sources,the degradation rate of atrazine could reach 50 mg·L^(-1)·h^(-1).In general,the discovery of strain ZF1 enriched the resources of atrazine degrading strains.Its excellent biodegradability and environmental tolerance showed that strain ZF1 had great potential in the bioremediation of atrazine contaminated sites in the future.
文摘“Less is more”,表面上看这是“更少的即是更多的”的意思。于笔者看来,这应是一个很有意境的词语,粗俗的“少即是多”的理解是相当缺乏表述力与意境的。当然,对于“Less is more”,可以从哲学的宏观与微观等许许多多的角度去理解它。在Simplex团队这里,“Less is more”首先是Simplex团队对汽车改装文化的态度,继而是由车延伸至生活的一种态度。有人会说“Less is more”充斥着难以理解的文艺范儿？那不妨由Simplex的Honda CR-Z来告诉你,Simplex的Less is more是怎样的。
