关于$\omega$-Smash余积Hopf代数的$(f,\omega)$相容对$(B,,H)$

In this paper we introduce the notion of （f,ω）-compatible pair （B,H）, by which we construct a Hopf algebra in the category HHYD of Yetter-Drinfeld H-modules by twisting the comultiplication of B. We also study the property of ω-smash coproduct Hopf algebras Bω H.     

Preparation of polypyrrole/polyvinylalcohol (PPy/PVA) composite foam electrode material

<正>Polypyrrole/polyvinylalcohol(PPy/PVA) foam was prepared by direct foam polymerization in water and then it was coated on the indium-tin oxide transparent conductive glass(ITO) to form conventional three-electrode cell.FTIR and UV-vis spectra were adopted to characterize the molecular structure and the absorption spectra of foam material,respectively.The porous structure of PPy/PVA foams and their photoelectric conversion behaviors were studied.The dimension of the pores is bigger than 100μm in diameter.Compared with the smooth film,the V_(oc) and I_(sc) of the foam film enhanced by 1.58-fold and 5.59-fold,respectively.     

Laurenidificin, a new brominated C15-acetogenin from the marine red alga Laurencia nidifica

<正>A new brominated C_(15)-acetogenin,namely,laurenidificin,was isolated from the marine red alga Laurencia nidifica.Its structure was determined on the basis of spectroscopic methods.     

Synthesis and characterization of a novel series of unsymmetrical porphyrins

A novel series of unsymmetrical porphyrins with aldehyde group at the terminal of the linkage which connected to meso-phenyl through acylamide bond have been synthesized and structurally characterized by IR,~1H NMR,MS,UV-vis,fluorescence.     

Purification, Characterization and 1H NMR Resonance Assignment of an a－Like Neurotoxin BmK 16 from the Venom of Chinese Scor－pion Buthus martensii Karsch

A natural scorpion toxin BmK 16 was purified for the first time from the venom of the Chinese scorpion Buthus martensii Karsch (BmK) by using combined gel-filtration, ion exchange and reversed phase chromatography. The sequence of the N-terminal 8 amino acid residues was determined by Edman degradation. Using the N-terminal sequence as a tag, the database searching revealed a hit in the scorpion cDNA Bank. The sequence for N-terminal 8 amino acid residues, molecular weight and amino acid compositions of BmK 16 were identical with the calculated values according to the first 64 residues‘ se-quence of the precursor peptide alpha-neurotoxin TX16 derived from the sequence of the cDNA AF156597 (EMBL). The se-quence-specific resonance assignment of BmK 16 was achieved and the intact sequence of BmK 16 was determined as follow-ings: VRDAY IAKPH NCVYE CARNE YCNDL CTKNG AKSGY CQWVG KYGNG CWCKE LPDNV PIRVP GKCH. Furthermore, the results from the sequence homology analysis and the toxicity assays indicated that BmK 16 was an α-likescorpion neurotoxin.     

涂膏热解法制备钛基Sn、Sb氧化物电极

研究了涂膏热解法制备Ti/Sn、Sb氧化物电极的新工艺，考察了SnCl4、SbCl3加入量和烧结温度对电极寿命和析氧电位的影响，并对电极进行了SEM、EDS、XRD测试.结果表明，在涂层厚度相近时，涂膏法制备的电极与热解法相比，具有表面氧化物分布均匀和TiO2不易裸露的优点，从而提高了析氧电位，延长了电极寿命，使电极具有很高的电催化活性和电化学稳定性.     

New Steryl Esters of Fatty Acids from the Mangrove Fungus Aspergillus awamori

The polyhydroxylated ergostane‐type sterol 9 , its derivatives 10 – 15 , and the fatty acid esters 1 – 8 were isolated from a fungus strain which was collected from mangrove areas at Wenchang, Hainan Province, P. R. China, exhibited potent cytotoxic activity, and was identified as Aspergillus awamori. The structures of 1 – 15 were elucidated by spectroscopic and chemical methods. Among them, the six steryl esters 1 – 6 of fatty acids were new compounds, i.e., (3β,5α,6α,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐palmitate ( 1 ), (3β,5α,6α,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐stearate ( 2 ), (3β,5α,6α,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐oleate ( 3 ), (3β,5α,6α,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐linoleate ( 4 ), (3β,5α,6β,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐palmitate ( 5 ), and (3β,5α,6β,22E)‐ergosta‐7,22‐diene‐3,5,6‐triol 6‐stearate ( 6 ). The related known fatty acids stearic acid (=octadecanoic acid) and palmitic acid (=octadecanoic acid) were also obtained. A speculative biogenetic relationship of the metabolites is proposed. The known polyhydroxylated sterols and derivatives showed cytotoxic activities, in agreement with earlier reports. The cytotoxic activities against B16 and SMMC‐7721 cell lines of the new steryl esters 1 – 6 by the MTT method were weak.     

1,4,7,10-tetramethyl-5,6-didehydrodibenzo[a,e]cyclooctene. A presumably planar fully conjugated eight-membered ring compound.

The first known stable crystalline derivative of 5,6-didehydrodibenzo[a,e]cyclooctene (1), namely, 1,4,7,10-tetramethyl-5,6-didehydrodibenzo[a,e]cyclooctene (2), was prepared and unequivocally characterised.     

纳米级β-Ni(OH)2掺杂Al(OH)3的电化学性能

钠米粉体;纳米级β-Ni(OH)2掺杂Al(OH)3的电化学性能     

关闭—启动型Geom／G／1离散排队及其在ATM网络中的应用

研究带有关闭延迟和启动时间的Geom/G/1离散时间排队,导出了稳态队长、等待时间的分布及其随机分解结果,该模型可用于ATM网络的虚通道分析,给出响应时间、启动率,闲置率等指标公式。