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共沉淀法制备磁性液体的粒度和纯度控制

沈阳教育学院学报 2004年第1期6卷 119-122页

作者：刘军沈阳大学师范学院初教分院辽宁沈阳110015

提出化学共沉淀法制备Fe3.4磁性液体的工艺流程包括溶液配制、化学反应和包覆分散三个阶段,其技术关键是控制Fe3.4磁性微粒的纯度、粒度和分散性。从理论和实验的角度,详细分析了在各阶段各种工艺参数对磁性颗粒纯度控制和粒度控制的影... 详细信息

提出化学共沉淀法制备Fe3.4磁性液体的工艺流程包括溶液配制、化学反应和包覆分散三个阶段,其技术关键是控制Fe3.4磁性微粒的纯度、粒度和分散性。从理论和实验的角度,详细分析了在各阶段各种工艺参数对磁性颗粒纯度控制和粒度控制的影响原理、影响程度和影响规律。说明各阶段不同工艺参数的合理匹配,是能够成功地制备出品质优良的磁性液体的关键。

关键词：共沉淀法磁性液体粒度控制纯度控制三氧化四铁功能材料

Research on the Application of ZigBee Technology in Positioning System

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Research on the Application of ZigBee Technology in Position...

The Nature of Bonding in IrC

2010 The 3.d International Conference on Computational Intelligence and Industrial Application (PACIIA2010)

作者： Ge Xiao-yu Wang Qing-hui and Feng An-song .Department of Information Engineering shenyang university of chemical Technology shenyang Liaoning Province china

ZigBee is a new global standard for wireless connectivity,focusing on standardizing and enabling interoperability of products within home control,building automation and industrial control and monitoring. It is now widely recognized that ZigBee is suitable for short distance,low complexity,low power,consumption and low rate applications. First of all,the paper introduces the application of ZigBee wireless communication network （WSN）. Then the emphasis is to provide a range-based method that can be used to realize personnel positioning in WSN based on ZigBee. It includes building ZigBee wireless communication network and taking advantage of Visual Basic and MathCAD to realize RSSI collection.

关键词： ZigBee WSN Positioning RSSI

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Chinese chemical Letters 1998年第12期9卷 0-0,0-0页

作者： Xiao Guang XIE Huai CAO (Modem biological Center, Yunnan university, Kunming 650091)Xian Jun BI (Department of Chemistry, Yunnan normal university, Kunming 650092)Shu Shan Dai (Department of Chemistry, Yunnan university, Kunndng 650091) Yunnan Univ Modern Biol Ctr Kunming 650091 Peoples R China Yunnan normal Univ Dept Chem Kunming 650092 Peoples R China Yunnan Univ Dept Chem Kunming 650091 Peoples R China

The nature of bonding in the title compound has been stUdied by using CASSCF andFOCI techniques. The ground state of IrC has been found to be 2△ arising primarilyfrom:.. 1σ2 2σ2 1π4 1δ3.3.2 configuration, which forms a triple bond between Ir and C atoms (one σ;two π). The lowest quartet state is 4Φ state which has the configuration:... 1σ2 2σ2 1π4 1δ3.2π1 3.2 andlies higher than the ground state by 1 .25eV. The molecular constants of the ground state calculatedat CASSCF level by using Morse's mode are: Re=1.6904A, De=4.86eV, We=113.cm-1, andB0=0.5219cm-1 comparable with the spectrum values (Re=1 .6858A, De=6.44 eV, We=1051cm-1and B0=0.5251 cm-1).

关键词： Nature of bonding IrC molecular constants CASSCF

Ab Initio Study of the Excited State Decomposition Reactions of Monothioformic Acid

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Chinese chemical Letters 1998年第5期9卷 459-461页

作者： Xiao Guang XIE Huai CAO (Modem biological Center, Yunnan university Kunndng 650091)Xian Jun BI (Department of Chemistry, Yunnan normal university Kunming 650092)Shu Shan DAI (Department of Chemistry, Yunnan university Kunndng 650091) Yunnan Univ Modern Biol Ctr Kunming 650091 Peoples R China Yunnan normal Univ Dept Chem Kunming 650092 Peoples R China Yunnan Univ Dept Chem Kunming 650091 Peoples R China

The possible excited state decomposition reactions (dehydrogensulfidation, dehydration, and dehydrogenation) of the four tautomers of monothioformic acid have been investigated by ab initio methods with 6-3.G** basis sets at the CIS level. The activation energies of the four excited state reactions are 42.57, 42.49, 56.90, 47.73.kcal/mol, and are respectively lower than that of the ground states by 24.52, 24.98, 27.28, and 21.10 kcal/mol.

关键词： monothioformic acid excited state decomposition reaction ab initio

Synthesis and Herbicidal Activities of N'-(substituted pyrimidin-2-yl)-N-Substituted Phenoxyacetyl Thiourea Derivatives

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Chinese chemical Letters 2000年第1期11卷 19-20页

作者： Si Jia XUE Jin Shan ZOU Hai Jian YANG (Department of Chemistry, Central china normal university, Wuhan 43.079) Cent china normal Univ Dept Chem Wuhan 430079 Peoples R China

Fifteen N'-(substituted pyrimidin-2-y1)-N-substituted phenoxyacetyl thioureas were synthesized and tested for biological activities. All of them are new compounds and their structures were confirmed by IR. IHNMR. MS and elemental analysis. Some of the target compounds showed excellent inhibitory activities against root and stalk of dicotyledon plant (such as radish). and selective on monoctyledon plant (such as rice).

关键词： 4-Nitrophenoxyacetyl thiourea 2,4-dichlorophenoxyacetyl thiourea synthesis 2-chlorophenoxyacetyl thiourea 2-amino pyrimidine herbicidal activity

The Nature of Bonding in PtN

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Chinese chemical Letters 1998年第7期9卷 687-690页

作者： Xiao Guang XIE Xian Jun BI Huai CAO Shu Shan DAI (Modem biological Center, Yunnan university, Kunming 650091)(Department of Chemistry, Yunnan normal university, Kunming 650092)(Department of Chemistry, Yunnan university, Kunming 650091) Yunnan Univ Modern Biol Ctr Kunming 650091 Peoples R China Yunnan normal Univ Dept Chem Kunming 650092 Peoples R China Yunnan Univ Dept Chem Kunming 650091 Peoples R China

The nature of bonding in the title compound has been studed by using CASSCF techniques. The ground state of PtN is found to be (2)Pi state arising primarily from: 1 sigma(2)2 sigma(2)1 pi(4)1 delta(4)3.sigma(2)2 pi(1) configuration, which forms triple bond between Pt and N atoms tone sigma, two pi). The lowest quartet state is (4)Sigma(-) State which has the configuration: ...1 sigma(2)2 sigma(2)1 pi(4)1 delta(4)3.sigma(1)2 pi(2) and lies higher than the ground state by 0.43.V.

关键词： PtN nature of bonding molcular constants CASSCF

A nude mouse model of endometriosis and its biological behaviors

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中华医学杂志(英文版) 2005年第18期000卷 70-73页

作者： WANG Dan-bo, ZHANG Shu-lan,NIU Hui-yan and LU Jing-ming Department of Obstetrics and Gynecology, Second Hospital of china Medical university, shenyang 110004, china Department of Obstetrics and Gynecology Second Hospital of China Medical University Shenyang 110004 China

Endometriosis (EM) as a common and intractable gynecological disease is characterized by unknown etiology and complex pathologic changes. Many factors of the disease are uncertain at the molecular level and it is difficult to study clinically. In this study, we attempted to establish a nude mice model of EM for dynamical observation of the genesis and development of the disease, morphological changes in tissue, and biological behaviors. METHODS Tissue processing The endometrium of late secretory phase was obtained from 24 patients with endometriosis and 24 normal premenopausal women undergoing endometrial biopsy or hysterectomy. Some fresh endometrial tissues were kept at -70℃, and others were washed in phosphate buffer solution (PBS) and cut into 2-3.mm3.fragments under sterile conditions. The tissues were transported in a mixture of PBS, 200 U/ml penicillin, and 200 μg/ml streptomycin. The specimens of the human greater omentum were obtained from patients with benign gynecologic diseases, and processed as the endometrial tissues. All the above tissues were proved normal pathologically after operation.

关键词： endometriosis · models animal · mice nude

Differential expression of a novel colorectal cancer differentiation-related gene in colorectal cancer

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World Journal of Gastroenterology 2001年第4期7卷 551-554页

作者： Xing-Guo Li Jin-Dan Song Yun-Qing Wang Key Laboratory of Cell Biology,Ministry of Public Health of china,china Medical university,{3. 110001,Liaoning Province,china Key Laboratory of Cell Biology Ministry of Health of China China Medical University Shenyang 110001 Liaoning Province China.

AIM: To investigate SBA2 expression in CRC cell lines and surgical specimens of CRC and autologous healthy mucosa. METHODS: Reverse transcription-polymerase chain reaction (RT-PCR) was used for relative quantification of SBA2 mRNA levels in 4 human CRC cell lines with different grades of differentiation and 3. clinical samples. normalization of the results was achieved by simultaneous amplification of beta-actin as an internal control. RESULTS: In the exponential range of amplification, fairly good linearity demonstrated identical amplification efficiency for SBA2 and beta-actin (82%). Markedly lower levels of SBA2 mRNA were detectable in tumors, as compared with the coupled normal counterparts PP Pbiological features need further studies.

关键词： Gene Expression Regulation, Neoplastic Cell Differentiation Colorectal Neoplasms DNA, Complementary Humans Molecular Sequence Data Neoplasm Proteins Polymerase Chain Reaction Tumor Cells, Cultured Tumor Markers, biological

Crystal structure of 7-(N,N'-diethylamino)-coumarin-3.carboxylic acid and fluorescence spectroscopic study of some Triethylene glycol derivatives of Coumarins

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Crystal structure of 7-(N,N'-diethylamino)-coumarin-3-carbox...