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Flavonoid triglycosides from the seeds of Camellia oleifera Abel

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Chinese Chemical Letters 2008年第11期19卷 1315-1318页

作者： li chun Du Bei li wu Jian Min Chen Department of Environmental Science ＆ Engineering Fudan University Shanghai 200433 China

Two flavonoid triglycosides, kaempferol 3-O-{ β-D-glucopyranosyl-（1→2）-[α-L-rhamnopyranosyl-（1→ 6）]-β-D-glucopyranoside} （1） and kaempferol 3-O-{ β-D-xylopyranosyl-（1 → 2）-[α-L-rhamnopyranosyl-（1→6）]-β-D-glucopyranoside } （2）, were isolated from the seed of Camellia oleifera Abel. The absolute configuration of compound 1 was established on the basis of its X-ray analysis. Their cytotoxic activities and anti-HIV-RT activities were evaluated.

关键词： Flavonoid triglycosides Camellia oleifera Abel Cytotoxic activity

Entropy of Four-Dimensional Spherically Symmetric Black Holes with Planck Length

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Communications in Theoretical Physics 2008年第12期50卷 1327-1330页

作者： ZHAO Ren ZHANG li-chun wu Yue-Qin li Huai-Fan Department of Physics Shanxi Datong University Datong 037009 China

Considering corrections to all orders in Planck length on the quantum state density from a generalized uncertainty principle （GUP）, we calculate the statistical entropy of the Bose field and Fermi field on the background of the four-dimensional spherically symmetric black holes without any cutoff. It is obtained that the statistical entropy is directly proportional to the area of horizon.

关键词： generalized uncertainty principle black hole entropy

Generalized Uncertainty Principle and Thermodynamic Quantities of SAdS_5 Black Hole

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维普期刊数据库

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Communications in Theoretical Physics 2008年第7期50卷 97-100页

作者： ZHANG li-chun wu Yue-Qin li Huai-Fan ZHAO Ren Department of Physics Shanxi Datong University Datong 037009 China

Recently, there has been much attention devoted to resolving the quantum corrections to the Bekenstein- Hawking black hole entropy. The different correction leading terms are obtained by the different methods. In this paper, we calculate the correction to SAdS5 black hole thermodynamic quantity due to the generalized uncertainty principle. Furthermore we derive that the black hole entropy obeys Bekenstein Hawking area theorem. The entropy has infinite correction terms. And every term is finite and calculable. The corrected Cardy-Vedinde formula is derived. In our calculation, Bekenstein Hawking area theorem still holds after considering the generalized uncertainty principle. We have not introduced any hypothesis. The calculation is simple. Physics meaning is clear. We note that our results are quite general. It is not only valid for four-dimensional spacetime but also for higher-dimensional SAdS spacetime.

关键词： generalized uncertainty principle correction to black hole entropy area theorem high-dimensional SAdS spacetime

Comparison of Clinical Effects of Au-Pt Based and Ni-Cr Based Porcelain Crowns

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Chinese Medical Sciences Journal 2012年第3期27卷 167-170页

作者： li-chun wu Ye Shi Teng Ma Department of Stomatology Peking Union Medical College HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100730China Department of Stomatology First Hospital of Huairou DistrictBeijing 101500China

Objective To compare the long-term clinical effects of two kinds of crowns and bridges made of porcelain fused to Au-Pt alloy and Ni-Cr alloy. Methods A total of 131 teeth (64 patients) were rehabilitated using porcelain-fused-to-metal crowns, among which 59 were rehabilitated with Au-Pt alloy metal ceramic crown and 72 with Ni-Cr alloy metal ceramic crown. The porcelain fracture, shade, marginal adaptation, gingival discoloration, and gingival status after finishing restoration and 36 months of follow-up were evaluated. Results After 36 months of restoration, porcelain fused to Au-Pt alloy crown showed better clinical effects than porcelain fused to Ni-Cr alloy crown in shade, marginal adaptation, gingival discoloration, as well as gingival status (all Plinical effects.

关键词： Au-Pt alloy Ni-Cr alloy porcelain-fused-to-metal crown clinical evaluation

Stereoselective synthesis and crystal structure of 4,6-O-benzylidene-N-octyl-D-allosamine hydrochloride

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Chinese Chemical Letters 2010年第7期21卷 798-801页

作者： Fu Yi Zhang chun li wu Cui Zhang Hong Min liu Chemistry Department The Key Lab of Chemical Biology and Organic Chemistry of Henan ProvinceZhengzhou University Zhengzhou 450052China School of Pharmaceutical Sciences Zhengzhou UniversityZhengzhou 450001China

The building block of N-alkyl derivative of allosamidin（chitinase inhibitor）,4,6-O-benzylidene-N-octyl-D-allosamine hydrochloride was stereoselectively synthesized in two steps under mild *** addition of octylamine to 2- oxoglucopyranoside gave a‘carbonyl group transfer＇ product in 62%*** stereoselective reduction of newly formed C=O with NaBH_4 produced title compound in 75%yield.X-ray diffraction analysis indicates the title compound adopts syn 1,2,3 stereochemistry and chair-chair *** crystal structure is stabilized by hydrogen bonds.

关键词： 2-Oxoglucopyranoside 4 6-O-benzylidene-N-octyl-D-allosamine hydrochloride X-ray structure

Treatment method of hazardous pickling sludge by reusing as glass–ceramics nucleation agent

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Rare Metals 2016年第3期35卷 269-274页

作者： Jian Yang Shen-Gen Zhang De-An Pan Bo liu chun-li wu Alex A.Volinsky Institute for Advanced Materials and Technology University of Science and Technology Beijing Department of Mechanical Engineering University of South Florida

Heavy metal containing pickling sludge（PS） is one of the by-products of the stainless-steel-making industry,which has been considered hazardous due to contained chromium and *** methods of PS disposing are landfill and cement *** research is aimed at disposing PS by solidification/stabilization and reusing it as a nucleation agent of glass–*** crystallization behavior and the properties of a glass in the CaO–MgO–SiO2–Al2O3 system were studied by considering PS as the nucleation *** results confirm that introducing 14 wt% PS as the nucleation agent of glass–ceramics can decrease crystallization temperature by 110.8 °C,refine the grain size by forming isometric crystals with size of 2 lm,enhance Vickers hardness by 2690 MPa and decrease water absorption from（1.21 ± 0.10） wt% to（0.04 ± 0.01） wt%.Therefore,it is reasonable to conclude that PS can be utilized as a nucleation agent to improve the crystallization and mechanical properties of the glass–*** testing results of US EPA toxicity characteristic leaching procedure（TCLP）confirm the safety of this reusing method.

关键词： Glass–ceramics Pickling sludge Nucleation agent Heavy metal stabilization

One-step Crystallization Kinetic Parameters of the Glass-ceramics Prepared from Stainless Steel Slag and Pickling Sludge

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Journal of Iron and Steel Research International 2016年第3期23卷 220-224页

作者： Shen-gen ZHANG Jian YANG Bo liU De-an PAN chun-li wu Alex A.VOliNSKY Institute for Advanced Materials and Technology School of Materials Science and EngineeringUniversity of Science and Technology Beijing Department of Mechanical Engineering University of South Florida

One-step crystallization is one of the most energy conserving methods for glass-ceramics ***,only a few kinetics studies focused on the glass-ceramics prepared by the one-step *** onestep crystallization kinetic parameters were studied using differential scanning *** activation energy（Ea）and the Avrami parameter（n）were calculated as 152.79kJ·mol-1 and 4.39,*** parameters indicate that continuous nucleation and three-dimensional crystal growth are the dominating mechanisms in the one-step crystallization process of the parent *** properties of the obtained glass-ceramics can be compared to the glass-ceramics prepared by the two-stage heat treatment and sintering *** crystallization kinetics research can be used to evaluate the one-step crystallization potential of a parent glass.

关键词： glass-ceramics one-step crystallization crystallization kinetics continuous nucleation

Effect of TiO_2 on Crystallization,Microstructure and Mechanical Properties of Glass-ceramics

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Journal of Iron and Steel Research International 2015年第12期22卷 1113-1117页

作者： Jian YANG Shen-gen ZHANG Bo liU De-an PAN chun-li wu Alex A.VOliNSKY Institute for Advanced Materials and Technology University of Science and Technology Beijing Department of Mechanical Engineering University of South Florida

The effect of TiO2addition to the stainless steel slag glass-ceramics was studied. Different mass percenta- ges of TiO2 were added to four samples of the parent glass made from stainless steel slag and cullet. The tempera- tures of nucleation and crystallization were determined by differential scanning calorimetry （DSC）. According to X- ray diffraction （XRD） and scanning electron microscopy （SEM） analysis, adding TiO2 refined grains and restricted the formation of the akermanite phase by capturing Ca2＋ to form the perovskite phase. Diopside was the main crystal phase of the glass-ceramics. The bending strength and Vickers hardness increased with the addition of TiO2. The optimal amount of TiO2 was 7 mass%, and the highest bending strength and Vickers hardness were 144.6 MPa and 6.26 GPa, respectively.

关键词： glass-ceramics TiO2 crystallization mechanical property

Post-radiation CT changes and recurrent nasopharyngeal carcinoma

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Chinese Medical Journal 2008年第10期121卷 916-922页

作者： LUO De-hong ZHOU chun-wu li Er-ni WEN Bi-xiu Department of Diagnostic Radiology Cancer Hospital Uhlnese Academy of Medical Sciences Peking Union Medical CollegeBeijing 100021 China

Background Nasopharyngeal carcinoma （NPC） is endemic in Southern Asia. Radiation therapy remains the mainstay of treatment strategies for NPC. Although approximately 19%-56% of patients develop a recurrent disease 5 years after their primary treatment, recognition of post-radiation changes and early detection of relapse are important in improving the outcome of NPC. Our aim was to analyze the post-radiation changes and recurrent diseases related to NPC using computed tomography （CT） scans and to investigate their relationship. Methods CT scans of 510 pathologically proven NPC patients who have been followed up for more than 2 years after radiation were reviewed. The tumor＇s response to the radiation therapy and its relevance to recurrence were evaluated. Results For patients who were followed up for more than 2 years, their CT scans-obtained within 3 months, during the 4th to the 6th month, and beyond 7 months after radiation therapy, showed a normal nasopharyngeal cavity with a slight thickening in the wall in 93.5%, 95.0% and 84.8% of the patients respectively. The degree of tumor regression had no significant relevance to the risk of recurrence within the initial 3 months （P=0.094）. During this term, the relapse rates in the cases in which the nasopharyngeal walls were displayed as normal, slightly or moderately thickening, or with obvious residual masses on CT scans were 7.1%, 11.7%, 23.5% and 23.1% respectively. The degree of tumor regression beyond 3 months after radiation therapy had a considerable reverse relevance to the risk of recurrence （P=-0.000）. The relapse rates were 13.2%, 14.1%, 10.2% and 2.1%, respectively, in the cases with a normal and a slightly thickening nasopharyngeal wall during the 4th to the 6th month, the 7th to the 12th month, the 13th to the 24th month, and beyond 25 months after radiation. In contrast, the percents in cases with moderate or more aggressive thickening walls in the corresponding periods were 62.5%, 88.9%, 100% and 1

关键词： nasopharyngeal neoplasms lymphatic metastasis neoplasm recurrence, local tomography, X-ray computed radiation therapy