生长素对乔纳金苹果试管苗生根的影响

以三倍体苹果品种乔纳金试管苗顶部茎段为试材，将其接种于添加不同生长素及其组合的MS(基本培养基)中，研究IAA、IBA、NAA 3种生长素对苹果试管苗生根的不同效应。结果表明：3种生长素均可诱导乔纳金试管苗生根，且组合处理的效应普遍优于单种激素，其中以MS IBA 0．8mg／L IAA 0．7mg／L为最好，其生根率达92％。     

The metabolism of the male antifertility agent 1-amino-3-chloropropan-2-ol in the rat

Summary The male antifertility agent 1-amino-3-chloropropan-2-ol (ACP,I) has been shown to be metabolized to-chlorohydrin (III) and metabolites of-chlorohydrin. This accounts for the similar antifertility and renal toxicity effects of both compounds.     

一种salen镍配合物的合成与晶体结构

合成和表征了一种新的salen镍配合物,并报道了其单晶衍射数据.化合物4:[NiC28H20Cl2N2O2]·CH2Cl2,M=631.00,单斜,P21/c,a=1.1086(2)nm,b=1.7521(4)nm,c=1.4819(3)nm,β=105.06(3)°,Z=4,V=2.779 5(10)nm3,Dc=1.508 g/cm3,R1=0.0531,R2=0.1136.     

1,3-苯二氧基二乙酸二芳酯的合成及植物生长调节活性

以PEG 4 0 0为催化剂 ,在液 液相转移催化条件下合成了一系列新的 1,3 苯二氧基二乙酸二芳酯 .用元素分析、IR以及1 HNMR确定了它们的结构 .初步生物活性试验表明 ,该类化合物对小麦幼苗的生长有一定的促进作用 .     

两株芽孢杆菌对玉门油田原油的降解作用

以石油为唯一碳源，从被石油污染的玉门油田土壤中，分离、筛选出2株高效降解石油的茵株A和B，研究了它们对原油的降解能力．结果表明，经12d后，A、B对原油的降解率分别可迭61．71％和53．12％．GC-MS分析表明，饱和烃中的正构烷烃、烷基环己烷、烷基苯和二环烷均能被明显降解，芳香烃中的萘和烷基萘经降解后几乎消失，菲和烷基菲经菌A作用后发生明显降解．茵株经鉴定，二者均为芽孢杆茵．     

上升有序加权欧氏平均算子及其在决策中的应用

提出了一种上升有序加权欧氏平均 (AOWEA)算子 ,详细研究了它的一些优良性质 ,如 :单调性、置换不变性等 .给出了一种基于AOWEA算子的多属性决策方法 .最后通过实例说明了该方法的可行性和有效性 .     

Turbo码最优周期交织器的设计

从码重分布的角度分析了影响Turbo码性能的原因，介绍了Turbo码最优周期交织器的概念，为Turbo码提供了一种新的交织器设计方法。经实验验证，用提出的方法所设计的交织器具有较好的性能，易于实现。     

卡诺图法化简异或逻辑函数

探讨了卡诺图化简异或逻辑函数的原理，提出了化简异或逻辑函数的新方法。     

A tale of tails: deciphering the contribution of terminal tails to the biochemical properties of two Dps proteins from Streptomyces coelicolor

Dps proteins are members of an extensive family of proteins that oxidise and deposit iron in the form of ferric oxide, and are also able to bind DNA. Ferroxidation centres are formed at the interface of anti-parallel dimers, which further assemble into dodecameric nanocages with a hollow core where ferric oxide is deposited. Streptomyces coelicolor encodes three Dps-like proteins (DpsA, B and C). Despite sharing the conserved four-helix bundle organisation observed in members of the Dps family, they display significant differences in the length of terminal extensions, or tails. DpsA possess both N- and C-terminal tails of different lengths, and their removal affects quaternary structure assembly to varying degrees. DpsC quaternary structure, on the other hand, is heavily dependent on its N-terminal tail as its removal abolishes correct protein folding. Analysis of the crystal structure of dodecamers from both proteins revealed remarkable differences in the position of tails and interface surface area; and provides insight to explain the differences in biochemical behaviour observed while comparing DpsA and DpsC.