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SANDWICH-TYPE THEOREMS FOR MEROMORPHIC MULTIVALENT FUNCTIONS ASSOCIATED WITH THE LIU-SRIVASTAVA OPERATOR

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Acta Mathematica Scientia 2012年第3期32卷 929-941页

作者： Nak eun Cho Department of Applied Mathematics Pukyong National UniversityBusan 608-737Korea

The purpose of this article is to obtain some subordination and superordi- nation preserving properties of meromorphic multivalent functions in the punctured open unit disk associated with the Liu-Srivastava operator.... 详细信息

关键词： Subordination superordination meromorphic multivalent function Liu- Srivastava operator sandwich-type result

Responses in gas exchange and water status between drought-tolerant and-susceptible soybean genotypes with ABA application

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The Crop Journal 2015年第6期3卷 500-506页

作者： Md.Mokter Hossain hon-Ming Lam Jianhua Zhang School of Life Sciences and Center for Soybean Research of the State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong

The purpose of this study was to investigate the physiological responses of drought-tolerant and drought-susceptible soybean genotypes to exogenous abscisic acid(ABA) application during progressive soil drying at seedling stages. Five-day old soybean seedlings were transplanted into PVC tubes filled with soil mixture. Seedlings were watered daily with similar water volumes until second trifoliate leaves emerged, and thereafter soil drying with or without exogenous ABA application was imposed. Half of the seedlings of each genotype were left for regular watering as control plants. Soil water status declined significantly over seven days of withholding water supply for both genotypes. Leaf expansion rate, stomatal conductance(g_s), leaf water potential(ψ_w), and relative water content of leaves(%RWC) declined significantly under soil drying as well as soil drying with ABA application, compared to their values for well-watered soybean genotypes. However, a drought-tolerant genotype(C12) responded more rapidly than a drought-susceptible genotype(C08) after imposition of soil drying and soil drying with exogenous ABA. In addition, application of exogenous ABA to water-restricted soybeans resulted in higher %RWC and ψwin the drought-tolerant than in the drought-susceptible genotype. Compared to the drought-susceptible genotype, the drought-tolerant genotype was more responsive to exogenous ABA application, resulting in a higher root-to-shoot ratio.

关键词： Drought stress Exogenous ABA Leaf relative water content Stomatal conductance Soybean genotypes

Can microfluidics address biomanufacturing challenges in drug/gene/cell therapies?

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Regenerative Biomaterials 2016年第2期3卷 87-98页

作者： hon Fai Chan Siying Ma Kam W.Leong Department of Biomedical Engineering Department of Systems BiologyColumbia UniversityNew YorkNY 10032USA

Translation of any inventions into products requires *** of drug/gene/cell delivery systems will eventually face manufacturing challenges,which require the establishment of standardized processes to produce biologically-relevant products of high quality without incurring prohibitive *** technologies present many advantages to improve the quality of drug/gene/cell delivery *** also offer the benefits of *** remains unclear is whether they can meet the scale-up *** this perspective,we discuss the advantages of microfluidic-assisted synthesis of nanoscale drug/gene delivery systems,formation of microscale drug/cell-encapsulated particles,generation of genetically engineered cells and fabrication of macroscale drug/cell-loaded micro-/*** also highlight the scale-up challenges one would face in adopting microfluidic technologies for the manufacturing of these therapeutic delivery systems.

关键词： microfluidics biomanufacturing nanoparticle microencapsulation microfiber

Structural, mechanical and corrosion properties of CNT-304 stainless steel nanocomposites

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Progress in Natural Science:Materials International 2019年第5期29卷 595-602页

作者： A.V.Radhamani hon Chung Lau S.Ramakrishna Department of Civil and Environmental Engineering National University of Singapore Department of Mechanical Engineering Centre for Nanofibers and Nanotechnology National University of Singapore

In this work, a systematic investigation was performed on the structural, mechanical and corrosion properties of CNT incorporated 304 stainless steel. Various concentrations of CNT from 0.5 to 4 wt% were incorporated into the 304 stainless steel matrix to investigate the feasibility of fabrication and enhancement of strength and other material properties. The fabrication of CNT-steel composite was achieved through a spark plasma sintering process at a sintering temperature of 800℃. Raman and morphological studies confirmed that the CNT structure was retained in the sintered pellets. Optimum performance was found at 0.5 wt% CNT giving a Vickers hardness of 351 Hv and compressive yield strength of 404 MPa which were 5.5 and 2.0 times, respectively, those of pristine steel. Corrosion studies with 3.5 wt% Na Cl solution revealed a slight increase in the corrosion rate for CNT dispersed samples.

关键词： Carbon nanotube 304-Stainless steel Spark plasma sintering Hardness Compression Corrosion

Effective Common Chinese Herbal Medicines Used in Treating Chronic Cholecystitis with Liver-Gallbladder Dampness-Heat Syndrome: A Review of Clinical Studies in the Past 10 Years

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World Journal of Traditional Chinese Medicine 2023年第1期9卷 8-20页

作者： Desmond Wei Kang Tee hon Foong Wong Centrefor Complementary and Alternative Medicine International Medical UniversityKuala LumpurMalaysia

The objective of the study is to identify the effective common Chinese herbal medicines used in treating chronic cholecystitis with liver-gallbladder dampness-heat syndrome(CCLGDHS) through reviewing relevant clinical studies published in the past 10 years. Data were collected from Science Direct and Chinese National Knowledge Infrastructure. Data screening was carried out for the abstracts and full texts of the data. The top 15 Chinese herbal medicines with the highest occurring frequency were selected, statistically analyzed, and classified by their medicinal properties, actions, and indications according to the Chinese Pharmacopoeia 2015 edition. The top 15 effective common Chinese herbal medicines comprise Chai Hu, Huang Qin, Jin Qian Cao, Bai Shao, Yin Chen, Yu Jin, Chuan Lian Zi, Yan Hu Suo, Zhi Shi, Ban Xia, Bai Zhu, Pu Gong Ying, Gan Cao, Zhi Zi, and Qing Pi. The predominant natures were cold, cool, and warm. This combination can clear stagnant heat, warm Yang, and regulate Qi dynamics. In addition, bitter, pungent, and sweet were the predominant flavors. They can clear dampness-heat, regulate Qi dynamics to relieve cramps and pain, as well as tonify the deficiency. Along with entering the liver and gallbladder meridians, these herbal medicines also entered the spleen, stomach, and lung meridians to prevent potential disease transmission. The combinatorial medicinal actions of the effective common Chinese herbal medicine highlight the importance of the holistic concept of traditional Chinese medicine when treating CCLGDHS. In addition, the inclusion of activating blood to promote blood circulation, relieving cramps and alleviating pain, and tonifying the spleen and stomach represents a new finding in the treatment principle for CCLGDHS.

关键词： Chronic cholecystitis common Chinese herbal medicines liver-gallbladder dampness-heat syndrome traditional Chinese medicine treatment

Mechanical strength and corrosion resistance of Al-additive friction stir welded AZ31B joints

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Journal of Magnesium and Alloys 2023年第5期11卷 1519-1535页

作者： Jae-Yeon Kim eun-Woo Kim Dong-O Kim eun-Kyo Ju Ji-eun Lee Jaeheon Lee Jai-Won Byeon Mining Engineering Department Colorado School of MinesGoldenCO 80401USA Department of Materials Science and Engineering Seoul National University of Science and TechnologySeoul 01811Republic of Korea

Compared to other structural alloys,magnesium alloys have a relatively poor corrosion resistance and low mechanical strength,which can be further deteriorated when these alloys are subjected to joining processes using the existing joining ***,we propose for the first time an additive friction stir-welding(AFSW)using fine Al powder as an additive to improve the mechanical strength as well as corrosion resistance of AZ31B weld *** is a solid-state welding method of forming a high-Al AZ31B joint via an in-situ reaction between pure Al powders filled in a machined groove and the AZ31B *** optimize the process parameters,AFSW was performed under different rotational and transverse speeds,and number of passes,using tools with a square or screw *** particular,to fabricate a weld zone,where the Al was homogenously dispersed,the effects of the groove shape were investigated using three types of grooves:surface one-line groove,surface-symmetric grooves,and inserted symmetric *** homogenous and defect-less AFS-welded AZ31B joint was successfully fabricated with the following optimal parameters:1400 rpm,25 mm/min,four passes,inserted symmetric grooves,and the tool with a square *** AFSW fully dissolved the additive Al intoα-Mg and in-situ precipitated Mg_(17)Al_(12)particles,which was confirmed via scanning electron microscopy,transmission electron microscope,and X-ray diffraction *** microhardness,joint efficiency,and elongation at the fracture point of the AFS-welded AZ31B joint were 80 HV,101%,and 8.9%,*** values are higher than those obtained for the FS-welded AZ31 joint in previous *** corrosion resistance of the AFS-welded AZ31B joint,evaluated via hydrogen evolution measurements and potentiodynamic polarization tests,was enhanced to 55%relative to the FS-welded AZ31B joint.

关键词： AZ31B magnesium alloy Additive friction stir-welding In-situ reaction Mg_(17)Al_(12)particles Joint efficiency Corrosion resistance

A 50-years record of dichloro-diphenyl-trichloroethanes and hexachloro-cyclohexanes in lake sediments and penguin droppings on King George Island, Maritime Antarctic

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Journal of Environmental Sciences 2005年第6期17卷 899-905页

作者： SUN Li-guang YIN Xue-bin PAN Can-ping WANG Yu-hon Institute of Polar Environment University of Science and Technology of China Hefei 230026 China College of Science China Agricultural University Beijing 100094 China

Since the ban on the use of organochlorine pesticides （OCPs） such as dichloro-diphenyl-trichloroethane （DDT） and hexachlorocyclohexane（HCH） in agriculture, their levels have generally dropped. In a number of cases, however, the levels of these OCPs were found to be unchanging or even increasing after the ban. With the aim to unveil the possible causes of these exceptions, we collected two lake cores from King George Island, West Antarctica, and determined their accumulation flux profiles and temporal trends of these OCPs. In the lake core sediments with glacier meltwater input, the accumulation flux of DDT shows an abnormal peak around 1980s in addition to the expected one in 1960s. In the lake core sediments without glacier meltwater input, the accumulation flux of DDT shows a gradual decline trend after the peak in 1960s. This striking difference in the DDT flux profiles between the two lake cores is most likely caused by the regional climate warming and the resulted discharge of the DDT stored in the Antarctic ice cap into the lakes in the Antarctic glacier frontier. Furthermore, to investigate the change of OCPs loadings in the Antarctic coastal ecosystem, we reconstructed the HCH and DDT concentration profiles in penguin droppings and observed a gradual increase for the former and a continuous decrease for the latter during the past 50 years. The increase of HCH seems to be due to the regional warming from the early 1970s and the resulted HCH discharge to the coastal ecosystem by glaciers＇ meltwater and the illegal use of HCH in the Southern Hemisphere in the recent decade. The different temporal trends of HCH and DDT accumulation rate in the lake core with glacier meltwater input and the aged penguin droppings can be explained by their different water-soluble property.

关键词： organochlorine pesticides(OCPs) DDT and HCH lake sediments penguin droppings temporal trend climate warming

Employment of encapsulated Si with mesoporous TiO_2 layer as anode material for lithium secondary batteries

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中国有色金属学会会刊：英文版 2009年第4期19卷 1023-1026页

作者： Sang-eun PARK Bo-eun KIM Sang-Wha LEE Joong-Kee LEE Advanced Energy Materials Processing Laboratory Korea Institute of Science and Technology Department of Chemical & Bio Engineering Kyungwon University

Silicon composite of nano-capsule type is newly applied as an active anode material for lithium ion ***2-encapsulated silicon powders were synthesized by a sol-gel reaction with titanium *** nanoparticles were successfully embedded into porous titanium oxide capsules that played as a buffer layer against drastic volume changes of silicon during the charge-discharge cycling,consequently leading to the retardation of the capacity fading of intrinsic silicon *** electrochemical and structural properties of silicon nanocomposites with different surface areas of encapsulating TiO2 layer were characterized by X-ray diffraction(XRD),nitrogen gas adsorption analysis by the Brunauer-Emmett-Teller(BET) equation,transmission electron microscopy(TEM),and galvanostatic charge-discharge experiments.

关键词：二氧化钛硅材料锂二次电池负极材料封装纳米复合材料透射电子显微镜就业

香港地区中学文凭考试诊断反馈系统的开发及改进

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中国考试 2024年第2期 40-46页

作者：禤美瑶萧伟乐周钜宽杨汉基席小明香港考试及评核局中国香港999077

为进一步推动“评核促进学习”,香港地区考试及评核局以历年香港地区中学文凭考试(HKDSE)的评核数据为基础开发了HKDSE诊断反馈系统。目前,该系统结合HKDSE 6个科目选择题的试题库,对学生学习表现数据加以分析并建立统计模型,为教师与... 详细信息

为进一步推动“评核促进学习”,香港地区考试及评核局以历年香港地区中学文凭考试(HKDSE)的评核数据为基础开发了HKDSE诊断反馈系统。目前,该系统结合HKDSE 6个科目选择题的试题库,对学生学习表现数据加以分析并建立统计模型,为教师与学生提供诊断性反馈报告,突出学生在不同能力或范畴的不足与强项。来自14所学校的约2200名学生及教师试用了该系统,通过问卷调查和访谈法,收集意见建议,以改进系统设计。系统改良版在“数据主导评核提升计划”中正式推出,辅之以学科教师培训,以帮助学校提升评核质量。

关键词：香港地区中学文凭考试诊断反馈评核促进学习个性化学习