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The Reaction of Benzimidazole Methiodide Salt with Bis-Grignard Reagent

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Chinese Chemical Letters 1997年第6期8卷 465-466页

作者： Shi, Z gu, h NW UNIV XIAN DEPT CHEMXIAN 710069PEOPLES R CHINA

The reaction of benzimidazole methoidide salt with bis-Grignard reagent is reported, and a new method for the preparation of dialdehyde is provided.

关键词： The Reaction of Benzimidazole Methiodide Salt with Bis-Grignard Reagent

The Synthesis of Dialdehyde from Sodium hydrogen Telluride with 1,1',3,3'-Tetramethyl-2,2'-bis-benzimidazolium Salt

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Chinese Chemical Letters 2002年第9期13卷 836-838页

作者： Yue, KF gu, h Shi, Z Northwest Univ Dept Chem Xian 710069 Peoples R China

The reaction of bis-benzimidazolium salts with sodium hydrogen telluride is reported, and a new synthetic method for dialdehydes is provided.

关键词： Bis-benzimidazolium salt sodium hydrogen telluride dialdehyde synthesis.

Ab initio STUDIES ON MAGNETISM OF 3d TRANSITION METAL DIMERS

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Acta Metallurgica Sinica(English Letters) 2007年第5期20卷 341-346页

作者： J.h. gu Z.L. Zhu School of Physical Engineering and Material Physics Laboratory Zhengzhou University Zhengzhou 450052 China

Ab initio calculations with the self-consistent full-potential linearized augmented-plane-wave method （FLAPW）, under generalized gradient approximation, have been carried out to describe the electronic and magnetic properties of 3d transition metal dimers. It predicted the antiferromagneticity of Cr2 and ferromagneticity of other species. The Mn2 dimer was shown to be ferromagnetic coupling with a local magnetic moment of 5μB. retaining the value of its free atom state. The V2 and Ni2 exhibited low spin-polarization with local magnetic moment of only 1μB per atom. On the other hand, Fe2 and Co2 were highly spin-polarized with local magnetic moments of 3 and 2μB.

关键词： magnetism 3d transition metal dimer ab initio calculation

ON ThE DYNAMIC ChARACTERISTICS OF MOULD-FILLING UNDER COUNTERGRAVITY

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Acta Metallurgica Sinica(English Letters) 1997年第5期10卷 409-414页

作者： Zeng, J.M. gu, h. Zhou, Y.h. guangxi Univ Nanning China

In this paper, the mathematical models for mould-filling under countergravity are derived on the basis of the principle of momentum. Dynamic processes of mould-filling are observed on a perspex model by means of high speed photography. The results indicate that the mould-filling under countergravity can be described by the second order nonlinear differential equations characterized by damping oscillations. The velocity oscillations amplify as the pressuring speed increases if the pressure differential functions are of the same type. On the other hand, if the functions are of different type, then the velocity oscillations depend upon whether the functions progressively increase or decrease. Velocity oscillations can be diminished dramatically by increasing the local damping within the gating system.

关键词： casting mould-filling dynamics

CONSTRUCTION OF UNITONS VIA PURELY ALGEBRAIC ALGORIThM

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Chinese Annals of Mathematics,Series B 1999年第1期20卷 1-6页

作者： gu ChAOhAO(C.h.gu) hU hEShENG(h.S.hU)(Institute of Mathematics,Fudan University,Shanghai 200433,China) Fudan Univ Inst Math Shanghai 200433 Peoples R China

A purely algebraic algorithm for constructing unitons is presented. It is shown that all unitons can be constructed by using this algorithm.

关键词： Uniton of U(N) Darboux transformation Renormalization

The synthesis of dialdehydes from dicarboxylic acids via imidazolines

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Chinese Science Bulletin 1997年第2期42卷 130-132页

作者： Shi, Z gu, h Xu, LL Department of Chemistry Northwest University Xi’an China

DIALDEhYDES are important chemical industrial materials, which are widely used in textile,medicine, dye, binder, coating and so on. The traditional method for preparing dialdehydes is the catalytic oxidation of glycol. We have reported the reduction ring-opening reaction of inndazoline by NaBh4.In this note, the reduction of imidazoline by sodium and ethanol is studied. A new synthetic method for the preparation of dialdehydes from dicarboxylic acids

关键词： dicarboxylic acid imidazoline dialdehyde new synthetic method.

Evaluation of computer imaging technique for predicting the SPAD readings in potato leaves

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Information Processing in Agriculture 2017年第4期4卷 275-282页

作者： M.S.Borhan S.Panigrahi M.A.Satter h.gu Research Specialist Agricultural and Biosystems Engineering DepartmentNorth Dakota State UniversityFargoND 58105USA Electrical and Computer Engineering Technology Purdue University West LafayetteIN 47907USA Agricultural and Biosystems Engineering Department North Dakota State UniversityFargoND 58105USA Graduate Student Computer Science DepartmentNorth Dakota State UniversityFargoND 58105USA Senior Software Developer Psychology DepartmentNorth Dakota State UniversityFargoND 58105USA

Facilitating non-contact measurement,a computer-imaging system was devised and evaluated to predict the chlorophyll content in potato leaves.A charge-coupled device(CCD)camera paired with two optical filters and light chamber was used to acquire green(550±40 nm)and red band(700±40 nm)images from the same *** leaves from 15 plants differing in coloration(green to yellow)and age were selected for this *** based image features,such as mean and variances of green and red band images,were extracted from the *** analyses demonstrated that the variations in SPAD meter reading could be explained by themeangrayandvariances of gray scale *** fitted least square models based on the mean gray scale levels were inversely related to the chlorophyll content of the potato leaf with a R^2 of 0.87 using a green band image and with an R2 of 0.79 using a red band *** the extracted four image features,the developed multiple linear regression model predicted the chlorophyll content with a high R^2 of 0.88).The multiple regression model(using all features)provided an average prediction accuracy of 85.08% and amaximum accuracy of 99.8%.The prediction model using only mean gray value of red band showed an average accuracy of 81.6% with a maximum accuracy of 99.14%.

关键词： Computer imaging Chlorophyll SPAD meter Regression Prediction accuracy

ACTIVATION MEChANISM OF AMORPhOUS Ni_(63)Zr_(32)La_5 ALLOY hYDROGENATION CATALYST

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Acta Metallurgica Sinica(English Letters) 1996年第4期9卷 291-297页

作者： Wang, X.K. Shen, N.F. Lei, G.J. gu, h.C.

The catalytic activity of amorphous Ni_63 Zr_32 La_5 ribbon for hydrogenation of ethyne to ethylene can be greatly enhanced when the alloy ribbon is pretreated with dilute acid solution,heated under negative atmosphere pressure and subjected to hydrogen reduction successively. The change of surface state of the ribbon during the activation has been analysed by AES and XPS. The surface of as-received ribbon is covered with a thin film of La_2 O_3. After pretreatment. the surface concentrations of both Ni and Zr increase obviously, whereas the surface concentration of La decreases ***, on the surface of activated catalyst the Ni and NiO disperse finely on the matrix consisting of oxides of both Zr and La and a small amount of fluorides of Zr and La.

关键词： amorphous Ni_(63) Zr_(32) La_5 alloy catalyst activation mechanism

DURATION OF APPEARANCE OF Vi ANTIGEN AND SALMONELLA TYPhI IN BLOOD AND URINE OF INFECTED MODELS

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中华医学杂志(英文版) 1991年第1期104卷 46-48页

作者： D M Wang X h gu Children's hospital Shanghai Medical University.

Salmonella typhi (S typhi) infected models were established to evaluate the latex agglutination test (LAT) and staphylococcal coagglutination test (SCT) for the detection of S typhi Vi antigen in blood and urine. Antigens in serum or urine were detected within 7 days after infection with positive cultures, and decreased in 2 weeks. LAT and SCT were positive in 7 mice with no bacteria isolation from blood and urine but their spleen aspirates yielded S typhi. Both tests are rapid and sensitive and may be used for the diagnosis of typhoid infection, especially in partially treated patients when their blood cultures are negative.

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