某电厂超滤膜污染分析及离线化学清洗

针对某电厂超滤膜组件运行后出现膜污染的现象,通过检查膜组件运行时的水质分析、SEM扫描分析和能谱分析寻找造成污染的原因,证明超滤膜组件的污染物是有机物和胶体,为此,采取离线化学清洗,以先采用碱洗,后酸洗的方式,使膜性能得以恢复,并对此后超滤装置的维护提出有效的建议.     

“变质量问题”教学探索

"变质量问题"是教师教学的难点,也是学生学习的难点,实践证明,只要注意教学各环节,强调关键的步骤,使之符合学生的思维特点,困难就会迎刃而解.     

Simultaneous changes in seed size,oil content and protein content driven by selection of SWEET homologues during soybean domestication

Soybean accounts for more than half of the global production of oilseed and more than a quarter of the protein used globally for human food and animal feed. Soybean domestication involved parallel increases in seed size and oil content, and a concomitant decrease in protein content. However, science has not yet discovered whether these effects were due to selective pressure on a single gene or multiple genes. Here, re-sequencing data from >800 genotypes revealed a strong selection during soybean domestication on GmSWEET10a. The selection of GmSWEET10a conferred simultaneous increases in soybean-seed size and oil content as well as a reduction in the protein content. The result was validated using both near-isogenic lines carrying substitution of haplotype chromosomal segments and transgenic soybeans. Moreover, GmSWEET10b was found to be functionally redundant with its homologue GmSWEET10a and to be undergoing selection in current breeding, leading the the elite allele GmSWEET10b, a potential target for present-day soybean breeding. Both GmSWEET10a and GmSWEET10b were shown to transport sucrose and hexose, contributing to sugar allocation from seed coat to embryo, which consequently determines oil and protein contents and seed size in soybean. We conclude that past selection of optimal GmSWEET10a alleles drove the initial domestication of multiple soybean-seed traits and that targeted selection of the elite allele GmSWEET10b may further improve the yield and seed quality of modern soybean cultivars.     

高职大学英语真实性课程评价方案的设计

真实性课程评价是近十几年来国际流行的课程评价方式,其能力本位的评价特点,决定其可以在高职大学英语能力培养方面起到重要作用。为实施高职大学英语真实性评价,需要根据高职各专业的英语能力需求,在英语课程评价各个环节进行真实性的设计,其中文化演练部分的评价设计是真实性评价设计的核心。     

基于TBL模拟模式及互评体系的微视频计算机公共课应用教学的研究

探究TBL团队合作基础上的学习和互评体系的构建,深入研究两者结合对学习效率的提升.TBL模拟角色充分调动学生的自我学习兴趣和求知的欲望,在团队合作中,存在竞争驱动,互评体系的个人任务感隐含驱动则更加强TBL的作用.结合微课设计中微视频设计的核心和难点,研究在科学性的前提下充分发挥学生的主观能动去学习,提出了基于TBL模拟模式和互评体系的微视频计算机公共课的课题研究.     

论《三国演义》中的冤假错案

作为历史小说的代表作,《三国演义》在艺术地再现风云变换的历史的同时,也再现了在政治利益冲突之时所产生的众多的冤假错案。这些冤假错案涉及面广,涉及人物众多,具有典型性。本文重在对这些冤假错案进行分类,并探讨冤假错案产生的原因,以帮助读者认识三国时期政治斗争的残酷性、复杂性。     

网络课件设计中的人性化问题探讨

近年来随着网络教育的蓬勃发展,如何更有效地建设网络资源日益成为重要而迫切的问题.本文阐述了网络课件设计中存在的人性化问题,及在设计网络课件时如何尽量满足学习者生理和心理的需要,使学习者的学习更舒适、更高效.     

思茅松无性繁殖扦插技术

思茅松无性繁殖扦插技术。从准备工作、扦插技术、造林定植、生长观测几个方面，系统、全面的总结了思茅松无性繁殖扦插的技术关键。