第六届易安原创作品大赛

易安原创作品大赛已经举办了五届,在这不算太长的时间里,易安网原创大赛取得的成果是可观的,先后有上千位作者的4500篇稿件参与了本次大赛,评选出8个易安原创奖,80个优秀奖,其中不少作者已经成为了易安网的博客作者,许多原创作品发表在《劳动保护》杂志上。     

有关邮寄论文作者稿费的几句话

本刊自创刊迄今,一直执行国家有关报刊发表文章后支付稿费的制度;一般支付期在当期杂志出版后的一周内．通过邮政公司汇兑;近几期杂志稿费寄出后,有若干作者的稿费,因逾期未取而退回;复寄出,作者逾期又未取再次退回;有的因作者的来稿地址不详而被退回。希望论文作者们关注一下此事：     

《化工环保》编辑部启事

《化工环保》期刊网站已于2012年8月1日开通,网址:www.hghb.com.cn。《化工环保》期刊实行作者在线投稿、专家在线审稿和编辑在线办公。请作者在"作者专区"登录后进行投稿,也可在线查看稿件处理状态。专家在"专家审稿"专区登录,填写并核实个人信息后,进行在线审稿。《化工环保》网站开通后,《化工环保》期刊只接受网上投稿,不再受理电子邮件投稿。     

声明

为适应我国信息化建设需要,扩大作者学术交流渠道,本刊已加入"中国期刊全文数据库"、"中国学术期刊综合评价数据库"、"中文科技期刊数据库"和"中国核心期刊(遴选)数据库"。作者著作权使用费与本刊稿酬一次性给付。如作者不同意将文章编入以上数据库,请在来稿时声明,本刊将做     

《安全》杂志征稿启事

本刊面向全国征稿,具体事宜如下:征稿内容:文章题材自定,与城市公共安全、安全生产与劳动保护、人居环境等领域相关的科学技术;专项研究;法律法规和最新动态等内容。     

GUIDELINES FOR AUTHORS

1 THE JOURNAL
The Journal publishes original papers in all fields of sustainable development. Papers are peer-reviewed according to the generally accepted criteria for scientific work.     

论可持续发展教育与区域可持续发展的关系

可持续发展教育是为了可持续发展的教育,那么可持续发展教育与区域可持续发展的关系是怎样的呢？通过作者研究分析,可持续发展教育与区域可持续发展不是简单的决定与被决定的关系,也不是毫不相干的平行关系,而是在一个大环境下互相促进、共同发展的利益共同体关系。     

Effects of ultrasonic pretreatment on sludge dewaterability and extracellular polymeric substances distribution in mesophilic anaerobic digestion

Effect of ultrasonic pretreatment on sludge dewaterability was determined and the fate of extracellular polymeric substances (EPS) matrix in mesophilic anaerobic digestion after ultrasonic pretreatment was studied. Characteristics of proteins (PN), polysaccharides (PS), excitation-emission matrix (EEM) fluorescence spectroscopy and molecular weight (MW) distribution of dissolved organic matters (DOM) in different EPS fractions were evaluated. The results showed that after ultrasonic pretreatment, the normalized capillary suction time (CST) decreased from 44.4 to 11.1 (sec·L)/g total suspended solids (TSS) during anaerobic digestion, indicating that sludge dewaterability was greatly improved. The normalized CST was significantly correlated with PN concentration (R2 = 0.92, p 0.01) and the PN/PS ratio (R2 = 0.84, p 0.01) in the loosely bound EPS (LB-EPS) fraction. Meanwhile, the average MW of DOM in the LB- EPS and tightly bound EPS (TB-EPS) fractions also had a good correlation with the normalized CST (R2 0.66, p 0.01). According to EEM fluorescence spectroscopy, tryptophan-like substances intensities in the slime, LB-EPS and TB-EPS fractions were correlated with the normalized CST. The organic matters in the EPS matrix played an important role in influencing sludge dewaterability.