检索结果-南通市图书馆

Chinese Journal of Structural Chemistry 2000年第3期19卷 181-186页

作者： WANG Geng zhou zhao-hui ZHANG hui YE Jian-Liang WAN hui-Lin Department of Chemistry and State Key Laboratory for Physical Chemistry of Solid Surface Xiamen UniversityXiamen361005

The sodium potassium citrato oxotungstate(VI) dimer, Na 4K 2〔W 2O 5\|(cit) 2〕·11H 2O (H 4cit = citric acid) was obtained by the reaction of sodium tungstate(VI) and excess potassium citrate monobasic (KH 3cit) in neutral solution. The crystal data for the title compound: monoclinic, C 12 H 30 K 2Na 4W 2O 30 , M r =1192.21, space group P2 1/n, a=17.427(4), b=10.022(2), c=18.637(3) , β=92.62(1)°, V=3252(2)  3, Z=4, D c =2.435 g/cm 3, μ( Mo Kα )=76.38 cm -1 , F( 000)=2288. The structure was refined to R =0.0434 for 6327 independent observed reflections with I>3σ(I) . The complex anion contains a quasi centrosymmetric (O 2W)O b(WO 2) core with a bent bridging oxo group 〔W-O b-W 175.0(4)°〕. Each citrate as tridentate ligand coordinates to a tungsten atom through the alkoxy, α carboxyl, and one β carboxyl group, while the other β carboxyl group remains uncoordinated. Principal dimensions are: W-O b 1.883(6) , (W=O t)av 1.715(6) , W-O (alkoxy) 1.959(6) , W-O ( α carboxy) 2.176(6)  and W-O ( β carboxy) 2.231(6) . The tungsten atom is located in a distorted octahedron environment.

关键词： oxotungstate(VI) citrate citric acid citrate method crystal structure

Effects of Shot Peening Process on Thermal Cycling Lifetime of TBCs Prepared by EB-PVD

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Aeronautics 2007年第2期20卷 145-147页

作者： zhou zhao-hui GONG Sheng-kai LI He-fei XU hui-bin ZHANG Chun-gang WANG Lu School of Materials Science and Engineering Beij＇ing University of Aeronautics and Astronautics Beij＇ing 100083 China Shenyang Liming.4ero-Engine Group Corporation Shenyang 110043 China

Conventional two-layered thermal barrier coatings （TBCs） are prepared by electron beam physical vapor deposition （EB-PVD） with ZrO2-8 wt% Y2O3 （8YSZ） as top coat and CoCrAlY as bond coat on disk-shaped Ni based super-alloy. In this paper, three kinds of shot peening process with different lengths of operating time were adopted for bond coating. As a result, changes took place in its surface roughness and the surface micro-hardness. A thermal cycling test at 1 273 Kx55 rain and another at room temperature for 5 min were performed to study the effects of shot peening process on the thermal cycling lifetime of TBCs. It is found that a moderate shot peening process will be able to prolong the life time. The oxidation dynamic of the as-processed TBCs basically accords with the parabolic rule, and the oxidation test also attests to the spallation between YSZ and thermal growth oxide （TGO） responsible mainly for the failure of TBCs.

关键词： thermal cycling lifetime shot peening thermal barrier coatings (TBCs)

Synthesis and Structure of（NH4）₂ [V2O₄（OCH₂COO）₂]

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 1994年第2期10卷 102-106页

作者： zhou, zhao-hui Wang, Jin-zhi Wan, hui-lin Tsai, Khi-rui

imeric ammonium(glycollate)dioxovanadium (NH4)2[V2O4(OCH2COO )2]has been prepared. The complex crystallizes in triclinic space group Pl with unitcell parameters: a = 0. 6124(1)nm, b= 0. 6952 (1)nm, c= 0. 8449 (1)nm, α=66. 08 (1),β=64. 21(1),γ= 78. 01(1)°V=0. 2958 nms, Z=1, R=0. 041. Thedimer contains a quasicentrosymmetric planar four-membered V2O2 ring with twoexocyclic glycollate entities coordinated by the oxygen atoms of hydroxy- and car-boxy late ligands .

关键词： Hydroxycarboxylate Vanadium complex Molecular structure

Effective VTeO/SBA-15 Catalyst Prepared by Precursor Method for the Selective Oxidation of Propane to Acrolein

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2008年第6期24卷 793-797页

作者： FENG Mao-ying HUANG Chuan-jing WENG Wei-zheng WAN hui-lin XU Qin zhou zhao-hui College of Chemistry and Chemical Engineering State Key Laboratory for Physical Chemistry of Solid Surface National Engineering Laboratory for Green Chemical Productions of Alcohols Ethers and Esters Xiamen University Xiamen 361005 P. R. China

Precursor decomposition was used for the preparation of VTeO/SBA-15 catalyst for the selective oxidation of propane to acrolein. The catalyst shows a better performance compared with those prepared by conventional impregnant method. A yield of 9.3% of acrolein was achieved with 2% V loadings at 500 ℃. XRD, N2-adsorption, H2-TPR, Py-IR and XPS measurements were used to unclose the relationship between the structure and performance of the catalyst.

关键词： Acrolein Propane Vanadium catalyst Precursor decomposition

A Study of Pt^(4+)Adsorption and Its Reduction by Bacillus Megaterium D01

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2000年第3期16卷 246-249页

作者： LIU Yue ying FU Jin kun zhou zhao hui YU Xin sheng YAO Bing xin Department of Biology Department of Chemistry Xiamen UniversityXiamen 361005P.R.China

The properties of Pt 4+ adsorption and its reduction by Bacillus megaterium D01 were studied by means of ICP, anode stripping voltammetry, TEM, IR and XPS. The results of ICP analyses showed that the Pt 4+ adsorptive efficiency of the strain D01 was as high as 94.3% under the conditions of 100 mg Pt 4+ /L, 1 g biomass/L, pH 3.5 and at 30 ℃ for 24 h. Moreover, it was confirmed from anode stripping voltammetry that the strain D01 possessed a strong reducibility. The TEM analysis indicated that the strain D01 was able to adsorb and reduce Pt 4+ to Pt 0, small particles. The XPS result further supported the reduction of Pt 4+ to Pt 2+ , followed by the further recuction to Pt 0. The IR spectrum implied that D01 biomass adsorption of Pt 4+ may result in the complexation of the CO bond to the Pt species.

关键词： Biosorption Bioreduction Platinum Bacillus megaterium

Effects of ketamine on proinflammatory cytokines and nuclear factor kappaB in polymicrobial sepsis rats

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第45期12卷 7350-7354页

作者： Xue-Min Song Jian-Guo Li Yan-Lin Wang Qing zhou zhao-hui Du Bao-hui Jia Jian-Juan Ke Department of Anesthesiology Zhongnan Hospital of Wuhan University Wuhan 430071 Hubei Province China

AIM： To explore the effects of ketamine on hemodynamics, plasma proinflammatory cytokine （TNF-α and IL-6） levels and nuclear factor kappa B （NF-κB） activation during polymicrobial sepsis. METHODS： Male Sprague-Dawlay rats were subjected to cecal ligation and puncture （CLP） or sham operation. The rats were randomly assigned into four equal groups： sham CLP group, CLP group, ketamine （KT）Ⅰ group and KTⅡgroup. Thirty minutes before CLP, ketamine （5 mg/kg per hour and 10 mglkg per hour, respectively） was infused continuously through the left femoral vein cannula in KT Ⅰ group or KTⅡgroup. Sham CLP group and CLP group received 0.9% saline only （5 mL/kg per hour）. The right femoral artery was cannulated to monitor mean arterial pressure （MAP） and heart rates （HR）,and draw blood samples. The proinflammatory cytokine （TNF-α and IL-6） levels of plasma were measured using enzyme-linked immunosorbent assays （ELISA）. The hepatic NF-κB activation was determined by Western blot and HPIAS 2000 image analysis system. Twenty hours after CLP, the rats were killed by right femoral artery phlebotomization. RESULTS： CLP produced progressive hypotension, and a first increase followed by a decrease in HR. The hypotension was prevented, and the HR was slightly steady in ketamine treated rats. TNF-α levels of plasma reached a peak value at 2 h after CLP. Ketamine （KT Ⅰ group or KTⅡgroup） caused a significant decrease compared with CLP group at 2, 5 and 9 h time points after CLP （14.3 ± 1.9 vs 4.3 ± 0.9, 9.7 ± 1.4 vs 4.3 ± 0.9; 9.3 ± 1.5 vs 4.3 ± 0.9, 8.7 ± 1.4 vs 4.3 ±0.9; 6.0 ± 1.5 vs 5.0 ± 1.7, 5.3 ± 0.8 vs 5.0 ± 1.7; P 〈 0.01, respectively）. The IL-6 levels of plasma firstly ascended and then descended in CLP group, and reached a peak value at 9 h after CLP. Ketamine （KT I group or KTH group） caused a significant decrease compared with CLP group at 5, 9 or 20 h after CLP （135.0 ± 52.6 vs 60.0 ± 16.3, 112.5 ± 52.6 vs 60.0 ± 16.3; 410.0 ± 68.7 vs 62.5 ± 12.5, 250.0 ± 28.0 vs 62.5 ± 12.

关键词： Ketamine Sepsis Hemodynamics Tumor necrosis factor α Interleukin 6 Nuclear factor kappa B

Effect of Combined Jin's Three-needle and Rehabilitation Care on Post-stroke Hemiplegia

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Acupuncture and Tuina Science 2013年第4期11卷 218-221页

作者： zhou zhao-hui Zhuang Li-xing Xu Zhan-qiong Liao Mu-xi Zhang Bin Han Chou-ping Acupuncture Department the First Hospital Affiliated to Guangzhou University of Traditional Chinese Medicine

Objective:To observe and compare the efficacy differences between combined Jin's three-needle and rehabilitation training and rehabilitation training alone for hemiplegia following an ischemic stroke. Methods:A total of 94 cases who met the inclusion criteria were randomized into an observation group using combined Jin's three-needle and rehabilitation training and a control group using rehabilitation training alone. The therapeutic efficacies were then assessed respectively before treatment, 14 d and 28 d after treatment using neurological deficient scale (NDS) and short-form Fugl-Meyer assessment (SFFMA) scale. Results:After treatment, the NDS and SFFMA scores in both groups were significantly improved (P<0.05); after 28-day treatment, the inter-group comparison showed a statistical significance (P<0.05). Conclusion:Combined Jin's three-needle and rehabilitation training and rehabilitation training alone can both enhance the nerve function recovery of patients with post-stroke hemiplegia and improve their motor function; however, the former could obtain better effects than the latter.

关键词： Acupuncture Therapy Scalp Stimulation Areas Stroke Complications Hemiplegia Rehabilitation

Structural　Access　to　Citrate　Process──Synthesis　and　Structure　of　Sodium－Potassium　Oxocitraovanadate（Ⅳ）　Dimer

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 1995年第Z1期 337-341页

作者： zhou zhao-hui Wan hui-Lin Hu Sheng-Zhi Tsai Khi-Rui(Department of Chemistry,Xiamen University,Xiamen 361005, China)

ＳｔｒｕｃｔｕｒａｌＡｃｃｅｓｓｔｏＣｉｔｒａｔｅＰｒｏｃｅｓｓ──ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒｅｏｆＳｏｄｉｕｍ－ＰｏｔａｓｓｉｕｍＯｘｏｃｉｔｒａｏｖａｎａｄａｔｅ（Ⅳ）Ｄｉｍｅｒ￥ＺｈｏｕＺｈａｏ－... 详细信息

ＳｔｒｕｃｔｕｒａｌＡｃｃｅｓｓｔｏＣｉｔｒａｔｅＰｒｏｃｅｓｓ──ＳｙｎｔｈｅｓｉｓａｎｄＳｔｒｕｃｔｕｒｅｏｆＳｏｄｉｕｍ－ＰｏｔａｓｓｉｕｍＯｘｏｃｉｔｒａｏｖａｎａｄａｔｅ（Ⅳ）Ｄｉｍｅｒ￥ＺｈｏｕＺｈａｏ－Ｈｕｉ；ＷａｎＨｕｉ－Ｌｉｎ；Ｈｕ...

关键词： citrate process precursor method vanadyl citrate molecular structure

Completely thoracoscopic lobectomy for the surgical management of bronchiectasis

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Chinese Medical Journal 2013年第5期126卷 875-878页

作者： zhou Zu-li zhao hui LI Yun LI Jian-feng JIANG Guan-chao WANG Jun Department of Thoracic Surgery Peking University People'sHospital Beijing 100044 China

Background The feasibility of completing a Iobectomy by completely video-assisted thoracoscopic surgery （cVATS） in the management of bronchiectasis is unclear. By retrospectively comparing the outcomes from the Iobectomies that used thoracotomy vs. cVATS, we determined the appropriateness of the minimally invasive cVATS approach in the management of bronchiectasis. Methods Between June 2001 and October 2010, 60 patients with bronchiectasis underwent surgery, of which 56 Iobectomies were performed. All Iobectomies were carried out by either thoracotomy or cVATS approach. Pulmonary vessels and bronchi were manipulated by ligation or stapler in the thoracotomy group, while they were dissected by endo-cutters in the cVATS group. Results There were 21 patients in the thoracotomy group and 35 patients in the cVATS group. Two cVATS patients （5.7%） converted. The difference in operation time, chest tube duration, lengths of hospitalization, and morbidity were not significantly different between the two groups （P 〉0.05）. The blood loss was less in the cVATS group （P=0.015）. A total of 52.4% and 62.9% of patients were postoperatively asymptomatic in the thoracotomy and cVATS groups respectively, and symptomatic improvement was obtained in 38.1% patients by thoracotomy vs. 31.4% patients by cVATS. Conclusion cVATS Iobectomy is safe and effective for the management of bronchiectasis, especially for the patients with localized lesions.

关键词： video-assisted thoracoscopic surgery lobectomy bronchiectasis

柠檬酸钒(Ⅳ)酰钡热分解制备焦钒酸钡Ba_2[VO(cit)]_2·4H_2O纯相

在线全文

学校读者我要写书评

暂无评论

高等学校化学学报 1999年第8期20卷 1168-1171页

作者：周朝晖缪建英章慧万惠霖厦门大学化学系

由柠檬酸钒酰钠与氯化钡的水溶液反应得到柠檬酸钒 ( )酰钡配合物 .通过凝胶扩散法得到该配合物的晶体 ,并用 X射线衍射测定其结构 .该晶体的空间群为 P2 1 n,晶胞参数 a=0 .9896 0 ( 9) nm,b=0 .87746 ( 5) nm,c=1 .2 1 0 75( 8) nm,... 详细信息

由柠檬酸钒酰钠与氯化钡的水溶液反应得到柠檬酸钒 ( )酰钡配合物 .通过凝胶扩散法得到该配合物的晶体 ,并用 X射线衍射测定其结构 .该晶体的空间群为 P2 1 n,晶胞参数 a=0 .9896 0 ( 9) nm,b=0 .87746 ( 5) nm,c=1 .2 1 0 75( 8) nm,β=93.1 1 9( 7)°,Z=2 ,R=0 .0 45.该配合物在空气中分解得到白色粉末 ,经 XRD粉末衍射分析确定为焦钒酸钡纯相 .

关键词：焦钒酸钡柠檬酸钒酰钡钒酸钡复氧化物