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Papillae alterations around single-implant restorations in the anterior maxillae:thick versus thin mucosa

International Journal of Oral Science 2012年第2期4卷 94-100页

作者： Mi-Si Si Long—Fei Zhuang xin Huang Ying-xin GU Chung-Hao chou Hong-Chang Lai ~Department of Oral and Maxillofacial Implantology Shanghai Ninth People's Hospital Affiliated Shanghai Jiao Tong University School of Medicine Shanghai China Faculty of Dentistry the University of Hong kong Chian Jing'an Dental Clinic ShanghaiChina

To evaluate the papilla alterations around single-implant restorations in the anterior maxillae after crown attachment and to study the influence of soft tissue thickness on the papilla fill alteration. According to the inclusion criteria, 32 patients subjected to implant-supported single-tooth restorations in anterior maxillae were included. The patients were assigned to two groups according to the mucosal thickness：（i） group 1, 1.5 mm≤mucosal thickness≤3 mm; and （ii） group 2, 3 mm〈mucosal thickness≤4.5 mm. Assessments of interproximal papillae at the time of crown placement （baseline） and at 6-month postloading （follow-up） were made by two prosthodontists using papilla fill index （PFI）. The mean mucosal thickness was （2.49±0.31） mm （group 1） and （3.81±0.31） mm （group 2） for the two groups respectively. A significant difference in PFI between the groups was detected at the baseline （P〈O.O01）. PFI improvements over time occurred after 6-month follow-up irrespective of the groups. When compared to group 1, the likelihood to obtain papilla fill was significantly higher for group 2 with an odds ratio of 6.05 （P〈O.O01）. The interproximal papilla level around single-implant restorations could improve significantly over time after 6-month restoration according to PFI assessment. The thicker mucosa before implant placement implied a more favorable esthetic outcome in papilla alteration.

关键词： esthetic outcome papilla fill index single-implant restoration soft tissue thickness

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Interdiffusion in the Fe_2O_3-TiO_2 system

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International Journal of Minerals,Metallurgy and Materials 2013年第3期20卷 273-278页

作者： Zhong-shan Ren Xiao-jun Hu Shen-yang Li Xiang-xin Xue Kuo-chih chou State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School of Metallurgical Ecological Engineering University of Science and Technology Beijing School of Materials and Metallurgy Northeastern University

Interdiffusion in the Fe203-TiO2 system was investigated by the diffusion couple method in the temperature range of 1323 to 1473 K. The diffusion concentration curves of Ti4＋ cations were obtained by electron probe microanalysis, according to which the Boltzmann-Matano method optimized by Broeder was used to calculate the interdiffusion coeffi- cients. The interdiffusion coefficients almost increased linearly with the mole fraction of Ti4＋ cations increasing, and they were in the range of 10-12-10-11cm2-s-1. The increase of temperature could also lead to the increase of the interdiffusion coefficients at a constant concentration of Ti4＋ cations. It was also found that the thickness growth of the diffusion layer obeyed the parabolic rate law.

关键词： interdiffusion titanium dioxide iron oxides diffusion couples electron probe microanalysis

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First principles application for mechanical properties of Ti-doped W particles enhanced U matrix composite

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Rare Metals 2018年第9期37卷 815-822页

作者： Jian-Bo Qi Li-Li Ru Guang-xin Wu Jie-Yu Zhang Kuo-Chih chou State Key Laboratory of Advanced Special Steel Shanghai University Institute of Metallurgy China North Nuclear Fuel Co. Ltd Department of Physical Chemistry University of Science and Technology Beijing

The stability, bonding, work of adhesion and electronic structure of the U/W interface with and without Ti were investigated by first principles to explore the me- chanical properties of W particles enhanced U-Ti alloy matrix composite as a construction material. The calculated results indicate that the preferable orientation of the U/W interfacial structure is （001）U/（110）w crystallographic plane, Ti atoms originating from U slab are prone to diffuse into W slab through the interface, and additional Ti in U matrix is the stronger adhesion to W, with an ideal work of adhesion of 6.93 J.m-2 for U-Ti/W interface, relative to the value of 6.72 J.m-2 for clean U/W interface. The stronger adhesion performance is due to the increase in valence electron hybridization for U-Ti/W compared with U/W interface, as evidenced by the characteristic of the local density of states for the interfacial atoms.

关键词： First principles U/W interface Diffuse Work of adhesion Electronic structure

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The potential of trehalose to replace insect hemolymph in artificial media for Trichogramma dendrolimi （Hymenoptera： Trichogrammatidae）

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Insect Science 2013年第5期20卷 629-636页

作者： xin Lu Shi-chou Han Li-Ying Li Simon Grenier Patrick De Clercq Guangdong Entomological Institute Guangzhou China UMR BF21 INRAIINSA Lyon France Department of Crop Protection Faculty of Bioscience Engineering Ghent University Ghent Belgium

Insect additives have been shown to improve the value of artificial media for Trichogramma species, but at the same time maintain dependence on parallel cultures of host insects. In the present study, Trichogramma dendrolimi Matsumura was reared in vitro from egg to adult on artificial media with different contents of pupal hemolymph of Chinese oak silkmoth Antheraea pernyi （Guérin-Méneville） and with supplements of distilled water, or of trehalose dissolved in water or in Grace＇s insect medium. The results indicated insect hemolymph was the key component of artificial medium. Developmental parameters, including rates of parasitism, pupation, adult emergence and normal adults, and numbers of produced adults, were increased on media supplemented with trehalose even when the proportion of pupal hemolymph was reduced. Two artificial media, the first containing 30% hemolymph and 10% trehalose in water with 98.9% parasitism rate, 77.7.0% pupation rate, 77.2% emergence rate, 80.0% normal adult rate and 333 produced adults, and the second containing 25% hemolymph and 15% trehalose in Grace＇s insect medium with 97.8% parasitism rate, 91.0% pupation rate, 85.2% emergence rate, 76.1% normal adult rate and 757 produced adults, were believed to hold potential to mass produce T. dendrolimi. The use of trehalose to partially replace pupal hemolymph in artificial medium of this and other Trichogramma species may contribute to a significant reduction in their production cost and may as such help to evade problems related to short supplies of lepidopteran eggs, which currently constitute the main factitious host for the mass rearing of the parasitoids.

关键词： artificial medium in vitro rearing trehalose Trichogramma dendrolimi

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黄花败酱化学成分研究

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天然产物研究与开发 2020年第5期32卷 783-791页

作者：张旋侴桂新上海中医药大学中药研究所上海中药标准化研究中心上海201203

对黄花败酱Patrinia scabiosaefolia的化学成分进行研究。采用硅胶、Sephadex-LH 20、制备等多种色谱分离技术进行提取分离纯化,然后应用波谱技术进行结构鉴定,从黄花败酱全草95%乙醇提取物中共分离得到24个化合物,分别鉴定为:8,9-dideh... 详细信息

对黄花败酱Patrinia scabiosaefolia的化学成分进行研究。采用硅胶、Sephadex-LH 20、制备等多种色谱分离技术进行提取分离纯化,然后应用波谱技术进行结构鉴定,从黄花败酱全草95%乙醇提取物中共分离得到24个化合物,分别鉴定为:8,9-didehydro-7-hydroxydolichodial(1)、convoldorine(2)、3-O-p-香豆酰奎尼酸(3)、松柏醛(4)、芥子醛(5)、C-藜芦酰乙二醇(6)、2,3-dihydroxy-1-(4-hydroxy-3,5-dimethoxyphenyl)-1-propanone(7)、莨菪亭(8)、异莨菪苷(9)、七叶苷(10)、clovin(11)、robinin(12)、苄基葡萄糖苷(13)、淫羊藿次苷F2(14)、2-苯乙基-1-O-β-D-葡萄糖苷(15)、淫羊藿次苷D1(16)、大黄素(17)、β-谷甾醇(18)、熊果酸(19)、2α,6α-dihydroxy-5-[(E)-3′-hydroxy-3′-methyl-1′-butenyl]-6-methyl-4-cyclohexen-3-one(20)、loliolide黑麦草内酯(21)、isololiolide异黑麦草内酯(22)、3,4,5-三甲氧基苯酚-l-O-β-D-葡萄糖苷(23)、对羟基苯甲醛(24)。其中,化合物1为新天然产物,化合物2、3、5~7、9~17、20、22~24为首次从败酱属中分离得到。以上化合物对人结肠癌细胞HCT-116均未表现出抑制活性。

关键词：黄花败酱败酱属化学成分 8,9-didehydro-7-hydroxydolichodial

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A New Method to Determine the Thickness of Spiral Galaxies:Apply to M31

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Chinese Physics Letters 2000年第6期17卷 466-468页

作者： LI Meng LUO xin-Lian PENG Qiu-He ZOU Zhi-Gang chou Chih-Kang Department of Astronomy Nanjing UniversityNanjing 210093 Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center Peking UniversityBeijing 100871 Graduate Institute of Astronomy^National Central University Chung-Li32054TaiwanChina

A new method is presented to determine the thickness of spiral *** on the rigorous solution of the Poisson equation for logarithmic density disturbance in three-dimensional spiral galaxies,we have derived an accurate dispersion relation for the stellar and gaseous disk with a finite *** this relation,a new method is put forward here for determining the thickness of *** apply this way to M31 and get the thickness of about 0.7kpc,which is in good agreement with the previous results.

关键词： galaxies M31 stellar

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General solution model and its new progress

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International Journal of Minerals,Metallurgy and Materials 2022年第4期29卷 577-585页

作者： Kuo-Chih chou University of Science and Technology Beijing Beijing 100083China

The physicochemical properties of multicomponent systems are involved in all fields of chemistry and have received attention from various related areas such as minerals,metallurgy,material science,environment,biology,and *** present,the relevant data can be obtained by using two major calculation methods,namely,the first principle method and the empirical *** the former has achieved recent great progress,it is still a long way to offer practical data;while the latter has not received progress for almost half a ***,a new method that is theoretically reasonable and accurate in practical application is necessary to obtain practical and precise physicochemical data for ternary and multicomponent *** this paper,a new theoretical model is suggested based on its corresponding binary *** feasibility of this theoretical model is discussed in terms of both theoretical analysis and practical performance.

关键词： multicomponent system physicochemical properties solution model phenomenological theory

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Combustion characteristics and kinetics of anthracite with added chlorine

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International Journal of Minerals,Metallurgy and Materials 2017年第7期24卷 745-755页

作者： Cui Wang Jian-liang Zhang Guang-wei Wang Ke-xin Jiao Zheng-jian Liu Kuo-chih chou School of Metallurgical and Ecological Engineering University of Science and Technology Beijing Beijing 100083 China State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing Beijing 100083 China

The combustion process of Yangquan anthracite（YQ） with the addition of 0.045wt%, 0.211wt%, 1.026wt%, and 2.982wt% chlorine was investigated using a thermogravimetric method from an ambient temperature to 1173 K in an air atmosphere. Results show that the YQ combustion characteristics are not significantly affected by an increase in chlorine content. Data acquired for combustion conversion are then further processed for kinetic analysis. Average apparent activation energies determined using the model-free method（specifically the KAS method） are 103.025, 110.250, 99.906, and 110.641 k J/mol, respectively, and the optimal kinetic model for describing the combustion process of chlorine-containing YQ is the nucleation kinetic model, as determined by the z（α） master plot method. The mechanism function of the nucleation kinetic model is then employed to estimate the pre-exponential factor, by making use of the compensation effect. The kinetic models to describe chlorine-containing YQ combustion are thus obtained through advanced determination of the optimal mechanism function, average apparent activation energy, and the pre-exponential factor.

关键词： chlorine anthracite combustion characteristics kinetics

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Group Velocity of the Density Waves in Galactic Disks

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Chinese Physics Letters 2000年第12期17卷 929-931页

作者： LONG Min PENG Qiu-He LUO xin-Lian chou Chih-Kang Department of Astronomy Nanjing UniversityNanjing210093 Chinese Academy of Sciences-Peking University Joint Beijing Astrophysical Center Beijing UniversityBeijing100871 Graduate Institute of Astronomy National Central UniversityChung-Li32054TaiwanChina

This letter is emphasized on the discussion of the group velocity of disturbed galactic density waves(GDW),which is one of the two most insurmountable problems in the density waves *** our calculation,we find that the galactic thickness has an important effect on the *** dynamic time scale of GDW in our three-dimensional model can be prominently prolonged,from 36%to 60%contrasting to that of two-dimensional galactic ***,it is still less than the lifetime of our Galaxy,which means that it is necessary to seek some other physical mechanisms to excite and sustain the GDW.

关键词： galactic theory. Velocity

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Supercapacitor electrode based on few-layer h-BNNSs/rGO composite for wide-temperature-range operation with robust stable cycling performance

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International Journal of Minerals,Metallurgy and Materials 2020年第2期27卷 220-231页

作者： Tao Yang Hui-juan Liu Fan Bai En-hui Wang Jun-hong Chen Kuo-Chih chou xin-mei Hou Collaborative Innovation Center of Steel Technology University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China

Currently,developing supercapacitors with robust cycle stability and suitability for wide-temperature-range operations is still a huge *** the present work,few-layer hexagonal boron nitride nanosheets(h-BNNSs)with a thickness of 2−4 atomic layers were fabricated via vacuum freeze-drying and ***,the h-BNNSs/reduced graphene oxide(rGO)composite were further prepared using a hydrothermal *** to the combination of two two-dimensional(2D)van der Waals-bonded materials,the as-prepared h-BNNSs/rGO electrode exhibited robustness to wide-temperature-range operations from−10 to 50℃.When the electrodes worked in a neutral aqueous electrolyte(1 M Na2SO4),they showed a great stable cycling performance with almost 107%reservation of the initial capacitance at 0℃ and 111% at 50℃ for 5000 charge−discharge cycles.

关键词： few-layer hexagonal boron nitride wide-temperature-range operation cycling performance

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