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Synthesis and light absorption of benzotellurazole crown ether cyanine dye

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chinese Journal of Chemistry 1995年第4期13卷 340-348页

作者： LUO, XH LIU, XF XU, hs WUHAN UNIV DEPT CHEMWUHAN 430072PEOPLES R CHINA

Various methods for synthesis of 2-methyl-5,6-(1,4, 7,10,13-pentaoxatridecamethylene)benzotellurazole (8) are described. Under different conditions, alkylation of compound 8 with methyl iodide gave telluronium salt 1,2-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzotellurazolium iodide (15) or quaternary ammonium salt 2,3-dimethyl-5,6-(1,4,7,10,13-pentaoxatridecamethylene)benzotellurazolium iodide (14) in high yields, repectively. The cyanine dye 3,3'-dimethyl-5,6,5',6'-bis(1,4,7,10,13-pentaoxatridecamethylene)telluracarbocyanine iodide (16) is obtained by condensation of 14 with ethyl orthoformate in acetic anhydride, The visible absorption of the cyanine dye is also discussed.

关键词： CROWN ETHER BENZOTELLURAZOLE CYANINE DYE SPECTRAL SENSITIZER SYNTHESIS

Ab initio Study on the Molecular Geometry, Electronic Structure and Thermodynamic Properties of Benzotrifuroxan(BTF)

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chinese Journal of Structural Chemistry 1999年第2期18卷 49-55页

作者： Gong, XD Xiao, HM Dong, hs Nanjing Univ Sci & Technol Dept Chem Nanjing 210094 Peoples R China china Acad Engn Phys Inst Chem Mat Mianyang 610003 Peoples R China

The molecular geometries and electronic structures of two isomers of benzotrifuroxan (BTF) have been studied using ab initio molecular orbital method at the HF/6 31G * level. The calculated results show that the hexanitroso isomer has much higher energy than the tetracyclic form and is unstable. Infrared frequencies have been calculated for the stable tetracyclic structure and scaled by 0.89. The scaled frequencies agree well with the available experimental results, and have been used to derive the standard thermodynamic functions, heat capacity( Cp °), entropy( S °) and enthalpy( H° H 298 °).

关键词： benzotrifuroxan(BTF) ab initio MO method molecular geometry electronic structure IR frequency thermodynamic property

Hump nosed viper bite in Sri Lanka-descriptive observational study of 1543 cases

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Asian Pacific Journal of Tropical Medicine 2010年第11期3卷 902-905页

作者： Wijewantha hs.Sellahewa KH National Hospital of Sri Lanka Colombo 10Sri Lanka

Objective:To identify the clinical manifestations of hump nosed viper envenomation and to recognize the available treatment methods to prevent ***:Descriptive observational study involving a series of 1 543 patients admitted with hump nosed viper bite to 5 major hospitals in Sri Lanka was *** collection was done consecutively during February 1990 and February *** Hypnale,identification of the biting snake was made by the corresponding author after visual examination of the dead or live snakes,which were brought to ***:Sixty seven(4.34%) patients developed systemic effects and two (0.1%) patients died due to effects of envenomation or complications of *** effects varied from coagulopathy,nephropathy to some neurological *** nine (3.8%) patients had only coagulopathy and they received either,intravenous isotonic saline to ensure adequate urine out put i.e.0.5 mL/kg /hour or 15 mL/kg of fresh frozen plasma(FFP). None of the patients that had coagulopathy developed renal *** of the sample by mildly venomous species of Hypnale may have contributed to the low incidence of systemic ***:It is likely that early hydration with normal saline or FFP can prevent acute renal *** showed a tendency for early correction of *** of FFP in hump nosed viper envenomation is worth studying in randomized double blind controlled clinical trials.

关键词： Snake bites Hump nosed viper Clinical manifestations Prevention of complications Fresh frozen plasma

Ab initio molecular orbital study of structure on aluminium borides AlB_n (n = 1- 5) series

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chinese Science Bulletin 1997年第11期42卷 907-910页

作者： Wu, hs.Xu, XH Zhou, WL Department of Chemistry Shanxi Normal University Linfen 041004 China

RECENTLY,great attention has been paid to the physical and chemical properties of atomic andsemiconductor *** the properties of AlB_n atomic cluster,experimental studieshave been reported,yet theoretical studies have not been *** borides(AlB_n)have been widely used to change the fiber strength in mechanical engineering and to adjust

关键词： aluminium boride ab initio molecular orbital binding energy.

Study of Carbon-poor Regions of Austenite during Bainitic Incubation Period by SAM

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Journal of Materials Science & Technology 1995年第5期11卷 353-357页

作者： WU, XL JIA, hs.ZHANG, XY KANG, MK Northwestern Polytechnical Univ Xi'an China

The variation of carbon composition in undercooled austenite during bainitic incubation period has been investigated in 40CrMnSiMoVA by scanning auger microprobe (SAM). The results show that the outstanding diffusion and redistribution of carbon occur in isothermally reacted specimens. This leads to the formation of carbon-poor regions (CPR) near austenite grain boundaries and in austenite grains. The carbon content in CPR exceeds the equilibrium carbon composition of ferrite. Furthermore, it is indicated that the existence of CPR is thermodynamically possible.

关键词： Metallographic microstructure

STM Study on the Surface Relief and Mechanism of Bainite Transformation

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Journal of Materials Science & Technology 1996年第4期12卷 249-254页

作者： Yang, ZG Fang, hs.Wang, JJ Zheng, YK Li, CM Dept. of Materials Science and Engineering Tsinghua University Beijing 100084 China

Scanning tunneling microscopy (STM) has been first employed to study the surface relief accompanying bainite transformation in a Fe-2.17C-12.18Cr-0.31Si-0.26Mn (wt pct) steel. With the exclusive vertical resolution of STM, we observed that the surface relief associated with bainite is a group of surface reliefs related to subplates, subunits and sub-subunits. As a whole, the relief group is in a tent shape, not of invariant plane strain (IPS) type, which is obviously different from that of martensite, and implying that bainite is not formed by shear mechanism. The fine structure of bainite in Fe-1.0C-4Cr-2.0Si (wt pct) alloy has also been studied with STM and TEM. It is found that the bainite plate is composed of subplates, subunits and sub-subunits. On the basis of the fine structure inside a bainitic ferrite plate observed under STM, a sympathetic-ledgewise mechanism of bainite formation is proposed.

关键词： Steel

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影响眼眶的副鼻窦疾病

空军航空医学 1988年第4期 69-70页

作者： WeLLiam hs. ,赖迎利

肿瘤和炎症可能从眼内(尤其是从脉胳膜黑色素瘤和视网膜母细胞瘤)、颅腔内(脑膜炎的病例)以及从鼻和副鼻窦内扩展到眼眶内。副鼻窦是使眼球移位和引起眼球突出的眼眶外疾病最常见的部位。眼眶与筛窦、额窦和蝶窦交界。出生时,每个上... 详细信息

肿瘤和炎症可能从眼内(尤其是从脉胳膜黑色素瘤和视网膜母细胞瘤)、颅腔内(脑膜炎的病例)以及从鼻和副鼻窦内扩展到眼眶内。副鼻窦是使眼球移位和引起眼球突出的眼眶外疾病最常见的部位。眼眶与筛窦、额窦和蝶窦交界。出生时,每个上颌窦大约长2cm,宽和高各1cm。筛窦迷路(一系列互相连接的空气小房)也在出生时即出现,大约与上颌窦等大。蝶窦与额窦于出生后才发育形成。一、感染 1.眶蜂窝织炎:由筛窦扩展感染而引起的眶蜂窝织炎,可能是幼儿眼球突出最常见的

关键词：眼眶副鼻窦筛窦额窦蝶窦鼻旁窦鼻筛小房粘液囊肿眼球突出藻菌病眶蜂窝织炎

Hepatoprotective and cytoprotective properties of Hyptis suaveolens against oxidative stress-induced damage by CCl_4 and H_2O_2

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Asian Pacific Journal of Tropical Medicine 2012年第11期5卷 868-874页

作者： Hadi Ghaffari Behrouz Jalali Ghassam hs.Prakash Department of Studies in Biotechnology University of MysoreManasagangotriMysore570006KarnatakaIndia

Objective:To investigate capacity of Hyptis suaveolens(***) methanol extract as an antioxidant to protect against carbon tetrachloride(CCl_4)-indueed oxidative stress,hepatotoxicitv in Albino Wistar rats and cytoprotective effect of hydrogen peroxide(H_2O_2) induced cell death in HepG_2 cell ***:Two different doses of methanol extract of *** were evaluated for the hepatoprotective activity against carbon tetrachloride(CCl_4) induced hepatotoxicitv in *** in GroupⅠ:served as control,groupⅡ:***(100 mL/ kg b.w),groupⅢ:***(50 mL/kg b.w) + CCl_4(1 mg/kg),groupⅣ:***(100 mL/kg b.w) + CCl_4(1 ml/kg)and groupⅤ:CCl_4(1 mL/kg).Histopathologic changes of liver were also *** was also determined by 3,(4,5-dimethylthiazol-2-yl)2,5-diphenyl-tetrazolium bromide(MTT) ***:Oral sigle dose treatment of CCl_4 produced a marked elevation in the serum levels of aspartate transaminase(AST),alanine transaminase(ALT), alkaline phosphatase(ALP) and Lactate dehydrogenase(LDH).Histopathological analysis of the liver of CCl_4-induced rats revealed marked liver cell necrosis with inflammatory collections that were conformed to increase in the levels of SOD,GSH,GST,GR and *** with H_2O_2 significantly induced death of HepG_2 *** with *** methanol extract inhibited or attenuated H_2O_2 induced ***:This study shows that *** methanol extract can be proposed to protect the liver against CCl_4-induced oxidative damage in rats and protect the cells against H_2O_2-induced oxidative damage in HepG_2 *** hepatoprotective and cytoprotective effects might be correlated with its antioxidant and free radical scavenger effects.

关键词： Hyptis suaveolens Antioxidant enzymes Lipid peroxidation HepG_2 cell line Hydrogen peroxide MTT assay

A clinical and long-term follow-up study of perioperative sequential triple therapy for gastric cancer

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World Journal of Gastroenterology 2000年第2期6卷 284-286页

作者： Zou SC Qiu hs.Zhang CW Tao HQ Zhejiang Prov Peoples Hosp Dept Surg Hangzhou 310014 Zhejiang Peoples R China

INTRODUCTIONAlthough the long-term postoperative survival rateof gastric cancer(GC) patients has been improvedsignificantly since the local dissection of lymph nodewas widely used in china,yet the low curativeresection rate and the high recurrence rate fromperitoneal and hepatic metastases hinder it fromfurther *** alter the currentunsatisfactory status of GC treatment,a

关键词： stomach neoplasms/surgery stomach neoplasms/drug therapy intra-arterial chemotherapy intra-peritoneal chemotherapy curative resection survival rate