Cascade Enzymatic Hydrolysis Coupling with Ultra ne Grinding Pretreatment for Sugarcane Bagasse Sacchari cation

The biorefinery process for sugarcane bagasse saccharification generally requires significant accessibility of cellulose. We reported a novel method of cascade cellulase enzymatic hydrolysis coupling with ultrafine grinding pretreatment for sugarcane bagasse saccharification. Three enzymatic hydrolysis modes including single cellulase enzymatic hydrolysis, mixed cellulase enzymatic hydrolysis, and cascade cellulase enzymatic hydrolysis were compared. The changes on the functional group and surface morphology of bagasse during cascade cellulase enzymatic hydrolysis were also examined by FT-IR and SEM respectively. The results showed that cascade enzymatic hydrolysis was the most efficient way to enhance the sugarcane bagasse sacchari cation. More than 65% of reducing sugar yield with 90.1% of glucose selectivity was achieved at 50 oC, pH=4.8 for 72 h (1200 r/min) with cellulase I of 7.5 FPU/g substrate and cellulase II of 5 FPU/g substrate.     

三氯苯达唑中间体合成方法的改进

以2,3-二氯苯酚与3,4-二氯-6-硝基苯胺为原料,在催化剂的存在下进行成醚反应,制备三氯苯达唑中间体。探讨和优化了合成条件,并采用液相色谱、红外光谱分析等手段确认了产物的结构。以经过改进后的中间体进行合成三氯苯达唑,最终产率达到了36.7%。     

超声溶栓

超声溶栓长期为人们所重点研究。本文对超声溶栓技术进行了综述，着重介绍和分析了其发展历史、溶栓机理、技术特点和研究现状，最后对以后的研究工作提出了一些看法。     

一维链状配位聚合物[Cd{5-(NO2)sal}2(2,2'-bipy)]n的合成与晶体结构

A coordination polymer of [Cd{5-(NO2)sal}2(2,2'-bipy)]n (5-(NO2)sal=5-nitrosalicylate, 2,2'-bipy=2,2'-bipyridine) was synthesized by hydrothermal reaction and characterized by elemental analysis, IR and X-raydiffraction single crystal structure analysis. The title complex crystallizes in monoelinic with space group C2/c, a=2.730 8(16) nm, b=1.272 3(5) nm, c=0.674 5(3) nm,β=96.73(2)°, V=2.327(2) nm3, Z=4, R=0.022 2, wR=0.057.The 5-nitrosalicylate anions doubly bridge the Cd(Ⅱ) atoms to form one-dimensional polymeric chain with therepeated eight-membered ring units (Cd-O-C-O)2. The crystal structure is stabilized by intra- and interchainhydrogen bonds interactions.     

2-羟基-1-萘甲醛缩氨基胍铜配合物的合成及表征

铜是生物体内必需的微量元素,是一些重要酶的活性中心,其配合物不仅在生命体系有着特殊的生物活性[1],而且由于具有特殊的磁学、电学、光学等性质而在材料、催化等许多领域中表现出潜在应用价值,因而成为人们关注的热点课题之一[2],为此我们合成了2-羟基-1-萘甲醛缩氨基胍铜配合物,并对此配合物进行了一系列表征.     

时频域独立元分析方法实现超声兰姆波的多模式分离

为方便兰姆波信号分析与模式定征,提出一种将短时傅里叶变换(Short-Time Fourier Transform,STFT)与独立元分析(Independent Component Analysis,ICA)相结合的多模式超声兰姆波识别方法.首先通过STFT将兰姆波时域信号投影至时频域,基于各模式信号在时频域相对独立...