论高校德育工作理念的创新

随着形势的变化、社会的发展，人们的工作方式、思维方式等都发生了很大的变化，高校德育工作要与时俱进，不断创新，而关键是德育工作理念的创新，如增强德育工作的前瞻性，尊重受教育者的主体性，坚持德育工作的艺术性、开放性、疏导性等原则。     

半波损失产生条件辩析

在诸多物理教科书中,对半波损失都有着几乎一致的描述.本文则通过分别计算入射光电场强度矢量E与反射光电场强度矢量E’之间三种不同的夹角α1、α2、α3,对反射光的E’相对于入射光的E的方向变化进行了具体分析,从而得出在一定条件下光波反射时,电场强度矢量的方向变化可能小于π/2.为使半波损失产生条件的描述更趋严谨和完善,有必要对此作进一步的修正.     

Production of Poly(3-Hydroxybutyrate-co-3-Hydroxyhexanoate) Using Aeromonas hydrophila 4AK4 Grown in Mixed Carbon Source

IntroductionPolyhydroxyalkanoates (PHAs) are intracellularenergy storage materials and/or reduction agentsthat are synthesized by many microorganisms[1 ] .Because these bacterial PHAs are trulybiodegradable thermoplastics or elastomers,theyhave attracted much attention in industry[2 ,3 ] .Poly(3 -hydroxybutyrate) (PHB) wasthefirst PHA to beproduced on a large scale and poly (3 -hydroxybutyrate-co-3 -hydroxyvalerate) (PHBV)was laterused in commercial applications.Recently,novel PHA copo…     

白蚁伞多糖的发酵生产

对白蚁伞在摇瓶和发酵罐中发酵产生白蚁伞多糖的动力学做了较为详细的研究。比较了几种不同培养基产生白蚁伞多糖的差异，筛选出在２８℃，２００ｒ／ｍｉｎ条件下，摇瓶产生白蚁伞多糖的最适培养基为黄豆粉葡萄糖培养基（以ｇ／Ｌ计）：黄豆粉５，葡萄糖３０，酵母浸膏粉２，ＫＨ２ＰＯ４１，ＭｇＳＯ４７Ｈ２Ｏ０．５，自来水配制，自然ｐＨ值（约５．５）。发酵１２０ｈ，达到最大的多糖产量０．５７３ｇ／Ｌ。在ＮｅｗＢｒｕｎｓｗｉｃｋＳｃｉｅｎｔｉｆｉｃ（ＮＢＳ）Ｂｉｏｆｌｏ－Ⅱ６．６Ｌ的发酵罐上设定２８℃，６００ｒ／ｍｉｎ，５～７Ｌ／ｍｉｎ的通气量发酵２７ｈ，达到最大的多糖产量０．５６５ｇ／Ｌ。发酵过程的ｐＨ和氨基氮变化与其它食用菌的不同。对苯酚－硫酸法测定糖含量的方法作了改进，使测定糖含量的标准曲线线性和准确性得到改善     

Production of Biodegradable Copolyesters and Terpolyesters of Polyhydroxyalkanoates by Alcaligenes latus DSM 1124

ＰｒｏｄｕｃｔｉｏｎｏｆＢｉｏｄｅｇｒａｄａｂｌｅＣｏｐｏｌｙｅｓｔｅｒｓａｎｄＴｅｒｐｏｌｙｅｓｔｅｒｓｏｆＰｏｌｙｈｙｄｒｏｘｙａｌｋａｎｏａｔｅｓｂｙＡｌｃａｌｉｇｅｎｅｓｌａｔｕｓＤＳＭ１１２４ＣｈｅｎＧｕｏｑｉａｎｇ（陈国强），ＣｈｅｎＪｉ...     

Biosynthesis Pathway Related Production of Medium Chain Length Polyhydroxyalkanoates

IntroductionPolyhydroxyalkanoates,abbreviated as PHA,is afamily of intracellular biopolymers synthesized bymany bacteria as carbon and energy storagecompounds[1,2 ] . Attempts have been made toproduce PHA for biodegradable packaging[3 5] .Various bacterial strains have different PHAbiosynthesis pathways. Gern et al,studying thebiosynthesis pathway of Pseudomonasputida using13C nuclear magnetic resonance,concluded that thestrain synthesized PHA via the de novo fatty acidsynthesis pathway …     

Fen(n=2～20)团簇的结构、电子和磁性对大小的依赖

使用紧束缚（TB）多体势和遗传算法（GA），计算了Fen（m=2～20）团簇的基态结构．从优化结构出发，使用自洽的紧束缚3d、4s、4p模型哈密顿，计算了每原子平均磁矩风和向上与向下自旋电子态密度DOS．对小（n≤6）的团簇，Fen的平衡结构非常类似于惰性气体团簇，与硬球堆积相一致．7～12个原子团簇的结构由二十面体的骨架——五角环组成．14～19个原子团簇形成六角环形结构．所计算的所有团簇的风都大于块体值，并随着团簇增大缓慢地非单调性地减小．平均配位数、团簇中局域配位数的分布和spd杂化都是影响电子和磁学特性的重要因素．     

Biosynthesis of Polyhydroxyalkanoates

IntroductionPolyhydroxyalkanoates ( PHA) is a family ofintracellular biopolymers synthesized by manybacteria as intracellular carbon and energy storagegranules ( Figs.1 and 2 ) .PHA is normallysynthesized under conditions of restrictedgrowth[16] .Industrial production has been used toproduce PHAs that are environmentally degradablethermoplastics[710 ] .Fig.1　 General m olecular structure ofpolyhydroxyalkanoatesm=1,2 ,3,yet m=1is the m ost common,n can range from10 0 to several thousand.R…     

Effect of Surface Modification on Microbiol Polyhydroxyalkanoate Films on Biocompatibility

IntroductionPolyhydroxyalkanoates,abbreviated as PHA,is afamily of biopolyesters synthesized by manyorganisms[1,2 ] ,with over1 0 0 different types basedon the length and composition of the carbon chain.PHA behavior is similar to that of conventionalplastics such as polyethylene and polypropyleneexcept that they are biodegradable;therefore,there have been many research projects to developPHA into a biodegradable plastic[3 ,4 ] .However,the high production costof PHA has prohibited itswide …     

农村蔬菜废物的分散化微生物处理

为解决蔬菜废物快速降解问题,通过实验室小型模拟堆沤装置,从堆沤材料中富集并筛选出一批高效纤维素分解菌,共25种表现型。用接种纤维素来分解复合菌的方法处理自然堆沤蔬菜废物的定性和定量实验研究表明:接种处理能够快速启动蔬菜废物的液化;以正交实验方法对不同的菌株组合进行配比,得到了效果明显、且菌株种类简单的理想组合;用该组合处理自然堆沤的蔬菜两周后,其固体残留率为7.10%,比对照少16.71%。黑麦草发芽实验结果显示,该沤肥产物不表现明显的植物毒性。