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Removing Impurity of cBN Crystal Prepared at High Pressure and High Temperature

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Chinese Physics Letters 2012年第3期29卷 224-226页

作者： JI xiao-Rui yang xiao-hong Department of Preparatory Course Shenyang Institute of EngineeringShenyang 110136

The black cubic boron nitride(cBN)single crystal is synthesized by using hBN-LiH and hBN-Li_(3)N-B as the raw materials at high temperature and high pressure(HTHP).The colors of the cBN crystal synthesized in an hBN-Li_(3)N-B system vary from transparent yellow,half-transparent and then opaque black with the increasing B content in the raw *** is worth noting that a trigonal shadow is presented at the center of the cBN crystal synthesized in the hBN-Li_(3)N-B system but can not be found in the hBN-LiH *** the Raman spectrum,we find that the darkening and the trigonal shadow in the cBN crystal may be due to the presence of excess B *** above-mentioned phenomenon can be determined by removing impurity capacity and growth environment of the cBN crystal.

关键词： transparent removing Crystal

Non-linear relationship between combustion kinetic parameters and coal quality

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2012年第5期13卷 344-352页

作者： Jian-guo yang xiao-long ZHANG hong ZHAO Li SHEN State Key Laboratory of Clean Energy Utilization Zhejiang University Hangzhou 310027 China

Combustion kinetic parameters(i.e.,activation energy and frequency factor) of coal have been proven to relate closely to coal properties;however,the quantitative relationship between them still requires further *** paper adopts a support vector regression machine(SVR) to generate the models of the non-linear relationship between combustion kinetic parameters and coal *** analyses on the thermo-gravimetry(TG) data of 80 coal samples were performed to prepare training data and testing data for the *** models developed were used in the estimation of the combustion kinetic parameters of ten testing *** predicted results showed that the root mean square errors(RMSEs) were 2.571 for the activation energy and 0.565 for the frequency factor in logarithmic form,*** curves defined by predicted kinetic parameters were fitted to the experimental data with a high degree of precision.

关键词： Kinetic parameter Coal property Thermo-gravimetry(TG) Support vector regression machine(SVR) Differential evolution

Defective callose walls and cell plates during abnormal meiosis cause male-sterility in the oat mutant zbs1

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Journal of Integrative Agriculture 2016年第2期15卷 241-248页

作者： SHI xiao WU Jin-xia ZHOU Hai-tao yang xiao-hong LI Tian-liang ZHANG Xin-jun yang Cai HAN xiao Biotechnology Research Institute Chinese Academy of Agricultural Sciences/National Key Facility for Gene Resources and Gene Improvement Beijing 100081 P.R.China Zhangjiakou Academy of Agricultural Sciences Zhangjiakou 075000 P.R.China

During meiosis in flowering plants,degradation of the callose wall in tetrads releases newly produced microspores,which develop into mature pollen *** this study,we identified zbs1,a male-sterile mutant of naked oat（Avena nuda L.）that displayed complete spikelet sterility due to inviable mature *** abnormal pollen grains originated from microspores with a defective callose wall and cell plate during *** defective callose wall and cell plate of the zbs1 mutant were detected by the labeling of cell wall epitopes（β-1,3-glucan） with immunogold during meiosis,and an abnormal chromosome configuration was observed by propidium iodide *** mature pollen grains of the zbs1 mutant were irregular in shape,and abnormal germination was observed by scanning electron ***,our results indicate that the cause of male sterility in zbs1 is abnormal meiosis.

关键词： callose male sterility meiosis microspore naked oat

Synthesis and Crystal Structure of [Cu(bbtz)(HCOO)_2(H_2O)_2]_n

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Chinese Journal of Structural Chemistry 2006年第7期25卷 793-796页

作者： PENG Yan-Fen LILT Tian-Bao yang xiao-hong LI Bao-Long Department of Chemistry Chizhou Teachers College Chizhou 247100 China College of Chemistry and Chemical Engineering Key Lab of Organic Synthesis of Jiangsu Province Suzhou University Suzhou 215123 China

The title compound [Cu（bbtz）（HCOO）2（H2O）2], （bbtz = 1,4-bis（1,2,4-triazol-1- ylmethyl）-benzene） was synthesized by the reaction of Cu（HCOO）2 and bbtz in methanol/H2O solution and its structure was determined by single-crystal X-ray diffraction. Crystal data： C14H18CuN6O6, monoclinic, space group P2 1/c, a = 9.651（2）, b = 10.380（2）, c = 9.368（2） A, β = 112.905（5）°, V = 864.5（3） A^3, Mr = 429.88, Z = 2, Dc = 1.651 g/cm^3, F（000） = 442, μ = 1.311 mm^-1, the final R = 0.0305 and wR = 0.0856 for 1891 observed reflections with I 〉 2σ（I）. X-ray crystal-structure analysis suggests the central copper atom of the title compound is six-coordinated in a distorted octahedral geometry by two nitrogen atoms from two bbtz ligands as well as four oxygen atoms from two H2O and two HCOO^-. The copper atoms are linked by bridging ligand bbtz to form a one-dimensional chain. There are intra- and interchain hydrogen bonding interactions between hydrogen atoms of coordinated water and uncoordinated oxygen atom of HCOO^-.

关键词： synthesis crystal structure cooper complex triazole ligand

Purification and Characterization of a Novel Tetradecapeptide from Ginseng Polypeptides with Enhancing Memory Activity for Mice

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Chemical Research in Chinese Universities 2013年第4期29卷 638-641页

作者： LUO Hao-ming JIANG Rui-zhi yang xiao-hong CHEN Ying-hong hong Tie WANG Ying School of Pharmaceutical Sciences Jilin University Changchun 130021 P R. China Jilin Academy of Chinese Medicine and Material Medical Science Changchun 130012 P. R. China

Aiming at isolating and investigating the active ingredients of the aqueous extract from Panax ginseng which showed enhancing memory activity, the authors characterized one ingredient. To separate the oligosaecharides and polypeptides, a DEAE-Sephadex A-50 colum was used. The enhanced memory activity in mice was studied by Mirros water maze tesk in mice. The dose of oligosacchrides, polypeptides or Piracetam was 30 mg/kg per day with intraperitoneal administration. The oligosaccharides did not show enhancing memory effect, but polypeptides did show. This result demonstrates that the active ingredients of the aqueous extract from Panax ginseng which showed enhancing memory effect was polypeptides. The purification of the polypeptides was performed on a Sephadex G-25 column. A novel tetradeeapeptide was purified from the polypeptides and its structure was determined by liquid chromatography-eleetrospray ionization-quadrupole-time of flight-mass spectrometry（LC-ESI-Q-TOF-MS） with the amino acid sequence of Lys-Ser-Leu-Thr-Leu-Thr-Ser-Ser-Leu-Ser-Tyr-Thr-Asp-Ser.

关键词： Panax ginseng Polypeptide Tetradecapeptide Enhanced memory activity Liquid chromatography-tandemmass spectrometry(LC-MS/MS)

Kinematics and Dynamics Model of GH4169 Alloy for Thermal Deformation

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Journal of Iron and Steel Research International 2010年第7期17卷 75-78页

作者： WANG Zhong-tang ZHANG Shi-hong CHENG Ming LI De-fu yang xiao-hong School of Materials Science and Engineering Shenyang Ligong University Shenyang 110159 Liaoning China Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 Liaoning China General Research Institute for Nonferrous Metals Beijing 100088 China

The stress-strain curves and microstructure properties of superalloy GH4169 was tested by thermal simulation experiment with different parameters,which were deformation temperature and strain rate and strain and original grain *** influence of technology parameters on crystal grain size of dynamic recrystallization（DRC）was *** kinematics model of superalloy GH4169 was established,in which the relation between grain size of dynamic recrystallization and function Z（Zener-Hollomon）and parameters was *** dynamics model of superalloy GH4169 was put forward,which described the relation between the quantity of dynamic recrystallization and function Z and *** research results showed that the grain size of dynamic recrystallization increased with increasing the temperature and decreasing the strain *** the grain size of DRC bore no relationship to original grain *** the quantity of dynamic recrystallization decreased with increasing the original grain size.

关键词： GH4169 superalloy kinematics model dynamics model thermal deformation

Design, Synthesis and Antitumor Activity of a Novel Series of PAC-1 Analogues

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Chemical Research in Chinese Universities 2013年第5期29卷 906-910页

作者： LUO Hao-ming yang Chun-ling ZHANG xiao-ying ZHAO Ming-ming JIANG Dan xiao Jun-hai yang xiao-hong LI Song School of Pharmaceutical Sciences Jilin University Changchun 130021 P. R. China National Engineering Research Center for the Strategic Drugs Beijing Institute of Pharmacology and Toxicology Beo'ing 100850 P. R. China The First Hospital of Jilin University Changchun 130021 P. R. China School of Pharmaceutical Engineering Shenyang Pharmaceutical University Shenyang 110016 P. R. China

A novel series of first procaspase activating compound（PAC-1） analogues was designed, synthesized and evaluated for antitumor activity towards two cell lines[human promyelocytic leukemia cell line（HL60） and human embryonic lung fibroblast cell line（HLF）] by the MTT[3-（4,5）-dimethylthiahiazo（-z-yl）-3,5-di-phenytetrazo- liumromide] method in vitro. The structures of all the compounds were confirmed by IH NMR, MS and elemental analysis. Among the compounds synthesized^（E）-2-[（3-{[4-（tert-buty~）benzy~]（methy~）amin~}pr^py~）（methy~）amin~]- N＇-[4-（diethylamino）-2-hydroxybenzylidene]acetohydrazide（compound 6n） exhibits a good anti-proliferative activity to the majority of tumor cells tested, and selectively cleaves cancer cells. Thus, compound 6n was identified as promising lead compound for further structural modification.

关键词： PAC-1 analogue Anticancer activity MTT assay HL60

Optimizing Culture System of Ri T-DNA Transformed Roots for Citrus grandis cv. Changshou Shatian You

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Agricultural Sciences in China 2006年第2期5卷 90-97页

作者： yang xiao-hong SUN Zhong-hai TONG Rui-jian Institute of Citrus Huazhong Agricultural University Wuhan 430007 P.R.China College of Horticulture and Landscape Architecture Southwest University Chongqing 400716 P.R. China

Genetic transformation experiments of the different explants from Citrus grandis cv. Changshou Shatian You infected with Agrobacterium rhizogenes were carried out in darkness or in light. The optimizing culture system of Ri T-DNA transformed roots for C. grandis cv. Changshou Shatian You was constructed as follows： After the ventral wounded striations on the single activation cotyledon were inoculated by A. rhizogenes A4 （logarithmic period）, they were cocultured at （25 ±2）℃ in darkness for 25-30 days; some transformed roots were generated from wounded striations of most cotyledons. The genetically transformed ratio is （83 ± 11）%. Axenic Ri T-DNA transformed roots （hairy roots） were harvested after five subcultures. Explants were activated on MT medium. The MS medium was used for subculture of transformed roots. Mass Ri T-DNA transformed roots in which the hormone was produced independently were harvested from this optimizing culture system. White, fresh Ri T-DNA transformed roots were （1.14 ±0.07） cm long, （0.73 ±0.04） mm wide, and the growth direction of transformed roots was negative geotropism.

关键词： Citrus grandis cv. Changshou Shatian You Agrobacterium rhizogenes Ri T-DNA transformed root optimizingculture system

Synthesis, Crystal Structure and Biological Activities of Naproxen-eugenol Ester Prodrug

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Chemical Research in Chinese Universities 2013年第2期29卷 245-248页

作者： LIANG Di yang xiao-hong SUN Wei WANG Wen-na yang Jin-zhu LIU yin-yan WANG Guang-shu School of Pharmaceutical Sciences Jilin University Changchun 130021 P. R. China The Second Hospital Jilin University Changchun 130041 P. R. China

The prodrug, naproxen-eugenol ester, was synthesized by acyl chloride method with naproxen and eugenol as the raw materials. The structure was identified by proton nuclear magnetic resonance（~H NMR）, mass spectrometry（MS）, infrared spectrometry（IR） and X-ray diffraction. The compound was crystallized in the or- thorhombic system, space group P21212t with unit cell dimensions a=0.60563（12） nm, b=1.0234（2） nm, c=3.2654（7） nm, a=90°, β=90°, γ=90°, V=2.0240（7） nm3, Z=4. Calculated density 1.235 Mg/m3; absorption coefficient： 0.083 mm-1; F（000）=800; final R1=0.0564. The analgesic activity and anti-inflammatory were similar to those of naproxen, and the results of ulcerogenic activity indicate that the prodrug can significantly decrease the irritation after oral ad- ministration.

关键词： Naproxen-eugenol ester Crystal structure Biological activity