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对冲火焰中煤粉着火的实验研究

工程热物理学报 2015年第1期36卷 224-227页

作者：吴宁宗毅晨李水清姚强罗忠敬清华大学热能工程系热科学与动力工程教育部重点实验室北京100084 清华大学燃烧能源中心北京100084

本文发展并建立了一套适用于研究煤粉穿越气相火焰面着火特性的对冲火焰实验系统,基于碰撞解聚原理研制了全新的微小载气量给粉系统。通过统计IccD拍摄的煤粉着火图像,结合数值计算分析煤粉颗粒的沿程温度经历,发现穿越扩散火焰面时颗... 详细信息

本文发展并建立了一套适用于研究煤粉穿越气相火焰面着火特性的对冲火焰实验系统,基于碰撞解聚原理研制了全新的微小载气量给粉系统。通过统计IccD拍摄的煤粉着火图像,结合数值计算分析煤粉颗粒的沿程温度经历,发现穿越扩散火焰面时颗粒升温速率可达10~5 k/s,火焰面温度及煤粉停留时间是决定煤粉穿越火焰面后着火模式的主要因素。

关键词：对冲火焰煤粉着火给粉

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虚拟动作绘画的互动三维画布(英文)

软件学报 2000年第9期11卷 1159-1166页

作者：叶豪盛曾秀妍罗志强杨曦崔明慧香港城市大学计算机科学系影像计算研究组香港城市大学创意媒体学院

传统油彩艺术多在纸张、画布、墙壁或任何质料制成的物件表面上作业 .将油彩艺术带进电脑虚拟现实的三维空间里是一突破性的试验 .美国著名画家 Jackson Pollock激发了“动作绘画”的意念 ,以人体作为画笔 ,不仅为油彩艺术带出一种新的... 详细信息

传统油彩艺术多在纸张、画布、墙壁或任何质料制成的物件表面上作业 .将油彩艺术带进电脑虚拟现实的三维空间里是一突破性的试验 .美国著名画家 Jackson Pollock激发了“动作绘画”的意念 ,以人体作为画笔 ,不仅为油彩艺术带出一种新的审美视野 ,还可有引发交错学科研究的潜在可行性 .利用一开发动作绘画工作室的骨架 ,试验出一种用人体作为画笔去控制绘画工作、并把三维画布的绘画工作视觉化的新形式绘画艺术 .

关键词：虚拟现实动作绘画动作抓取颜色分别三维画布

Genomics-driven derivatization of the bioactive fungal sesterterpenoid variecolin:creation of an unnatural analogue with improved anticancer properties

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Acta Pharmaceutica Sinica B 2024年第1期14卷 421-432页

作者： Dexiu Yan Jemma Arakelyan Teng Wan Ritvik Raina Tsz ki chan Dohyun Ahn Vladimir kushnarev Tsz kiu cheung Ho ching chan Inseo choi Pui Yi Ho Feijun Hu Yujeong kim Hill Lam Lau Ying Lo law chi Seng Leung chun Yin Tong kai kap Wong Wing Lam Yim Nikolay S.karnaukhov Richard Y.c.kong Maria V.Babak Yudai Matsuda Department of chemistry City University of Hong KongHong Kong SARChina iGEM Team“Variecure” City University of Hong KongHong Kong SARChina Department of Biomedical Engineering City University of Hong KongHong Kong SARChina Moscow clinical Research center Named After A.S.Loginov Moscow 111123Russian Federation

A biosynthetic gene cluster for the bioactive fungal sesterterpenoids variecolin(1)and variecolactone(2)was identified in Aspergillus aculeatus ATcc *** production of 1 and 2 was achieved in Aspergillus oryzae by expressing the sesterterpene synthase VrcA and the cytochrome P450 ***,the replacement of VrcB with homologous P450s from other fungal terpenoid pathways yielded three new variecolin analogues(5-7).Analysis of the compounds’anticancer activity in vitro and in vivo revealed that although 5 and 1 had comparable activities,5 was associated with significantly reduced toxic side effects in cancer-bearing mice,indicating its potentially broader therapeutic *** study describes the first tests of variecolin and its analogues in animals and demonstrates the utility of synthetic biology for creating molecules with improved biological activities.

关键词： Animal studies Anticancer properties Biosynthesis Natural products Sesterterpenoids Synthetic biology Terpene synthases Variecolin

Awareness of the Termination of Pregnancy Act of the laws of Zambia among Women of Reproductive Age at kanyama First Level Hospital in Lusaka District Zambia

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Open Journal of Obstetrics and Gynecology 2024年第8期14卷 1267-1287页

作者： J. k. Botha c. c. Ngoma P. S. Munkoka Lusaka District Health Office Matero First Level Hospital Lusaka Zambia Department of Midwifery Womens and Child Health School of Nursing Sciences University of Zambia Lusaka Zambia college of Nursing and Midwifery University of Lusaka Lusaka Zambia

Background: Termination of pregnancy (TOP) in Zambia is guided by the Termination of Pregnancy (TOP) Act of 1972 and as amended in 1994 of the laws of Zambia. However, despite provision of comprehensive abortion care services with the liberal law, statistics at kanyama First Level Hospital in relation to unsafe illegal abortions are alarming. This study sought to understand the Awareness on the TOP Act of the laws of Zambia among women of reproductive age 15 - 49 years at kanyama First Level Hospital in Lusaka District. Purpose of the Study: To assess awareness on the TOP Act among women of reproductive age at kanyama First Level Hospital in Lusaka, Zambia. Methodology: A convergent parallel mixed method design was conducted using both survey and in-depth interviews among women of reproductive age at kanyama First Level Hospital in Lusaka District. The study surveyed 370 randomly sampled women aged 15 to 49 years old while the in-depth interviews included eight women purposively sampled from the survey population. Survey data was analyzed using descriptive and inferential statistics while qualitative data thematic analysis was used. Results: The study found that 37% of the participants were aware of the TOP Act while 63.8% viewed legalization of abortion for any reason as wrong. The study results also showed that widowed women were 8 times more likely to be aware of the TOP Act compared to single women (AOR: 8.262;95% cI: 1.105, 61.778). Women in business were significantly more likely to be aware of the TOP Act compared to those who reported having no occupation. (AOR: 2.61;95% cI: 1.246, 5.499). Limited access to information, the social stigma attached to abortion, health care providers’ attitudes, cultural norms, values and religious beliefs, restrictive legal requirements, and absence of a supportive network were some of the barriers affecting awareness and utilization of available safe abortion care services. conclusions: The research findings concluded that a

关键词： Awareness Termination of Pregnancy Act Barriers Determinants Women

腕固有韧带MR及多层cT关节成像:比较横断面与斜横断面影像

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国际医学放射学杂志 2017年第3期 360-360页

作者： R.k.L.Lee J.F.Griffith A.W.H.Ng E.k.c.law W.L.Tse c.W.Y.Wong 王芳 Department of Imaging and Interventional Radiology Prince of Wales Hospital The Chinese University of Hong Kong

摘要目的比较横断面及斜横断面MR关节成像及cT关节成像,评估舟月韧带和月三角骨间韧带背侧和掌侧部。方法将5名男性的9只腕关节尸体标本纳入研究。基于MR及cT关节成像,将舟月韧带和月三角骨间韧带背侧和掌侧部的可见性进行半定量分级(... 详细信息

摘要目的比较横断面及斜横断面MR关节成像及cT关节成像,评估舟月韧带和月三角骨间韧带背侧和掌侧部。方法将5名男性的9只腕关节尸体标本纳入研究。基于MR及cT关节成像,将舟月韧带和月三角骨间韧带背侧和掌侧部的可见性进行半定量分级(好、中、差)。以关节镜结果作为金标准,计算MR及cT关节成像检出韧带撕裂的敏感度、特异度和准确度。结果 MR关节成像斜横断面影像显示月三角骨间韧带背侧和掌侧部特别有优势,韧带显示良好的比例由11%提高到78%。使用斜横断面MR及cT关节成像,显示舟月韧带和月三角骨间韧带的准确度更高。cT关节成像检出

关键词： MR 掌侧背侧方位骨间韧带运动器官关节 cT

Osmotic concentration of succinic acid by forward osmosis:Influence of feed solution pH and evaluation of seawater as draw solution

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chinese Journal of chemical Engineering 2018年第5期26卷 976-983页

作者： Jeng Yih law Abdul Wahab Mohammad Department of chemical and Process Engineering Faculty of Engineering and Built Environment Universiti Kebangsaan Malaysia Section of chemical Engineering Technology Universiti Kuala Lumpur Malaysian Institute of Chemical & Bioengineering Technology

In this study, we investigated the essential role of feed solution pH so as to gain insights into the transport mechanisms of succinic acid concentration by osmotically-driven forward osmosis （FO） process. FO performances including water flux and bidirectional transport of succinate and chloride anions were systematically examined using cellulose triacetate-based FO membrane. Additionally, real seawater was explored as draw solution. Experimental results revealed that the pH-dependent speciation of succinic acid can affect the FO performances. Ionization of succinic acid at higher solution pH enhanced the osmotic pressure of feed solution, thus leading to lower water flux performance. A strong effect was pointed out on the succinate rejection for which nearly 100% rejections were achieved at pH above its pka2 value. The rejection of succinate increased in the following order of chemical form： c2H4c2O4H2 〈 c2H4c2OH- 〈 c2H4c2O24-. With real seawater as the draw solution, low to moderate water fluxes （〈4 L. m- 2. h- 1 ） were observed. The divalent succinate anion was highly retained in the feed side despite differences in the succinic acid feed concentration at pH of approximately 6.90.

关键词： Forward osmosis Succinic acid pH Transport mechanism Seawater

Stem cell Niche,the Microenvironment and Immunological crosstalk

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cellular & Molecular Immunology 2008年第2期5卷 107-112页

作者： law Sujata S.chaudhuri Stem cell Research and Application Unit Department of Biochemistry and Medical BiotechnologySchool of Tropical MedicineC R AvenueKolkata 700073India

The concept of stem cells, their physiological existence, the intricate anatomical localization, the known and the unknown functions, and their exclusive utility for the purpose of regenerative medicine, are all now encompassed within an emergent question, ＇how compatible these cells are immunologically？＇ Indeed, the medical aspects of stem cells are dependent on a large number of queries based on the basic properties of the cells. It has greatly been emphasized to probe into the basic research on stem cells before any successful therapeutic attempts are made. One of the intricate aspects of the adult stem cells is its immunological behavior in relation to the microenvironmental associates, the stromal cells in the presence of a suitable target. cellular ＆ Molecular Immunology.

关键词： stem cell niche stromal immunology

SEASONAL AND DIURNAL VARIATIONS OF PM_(1.0),PM_(2.5) AND PM_(10) IN THE ROADSIDE ENVIRONMENT OF HONG kONG

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china Particuology 2006年第6期4卷 312-315页

作者： k.F. Ho S.c. Lee S.W. law Research center of Urban Environmental Technology and Management Department of Civil and Structural Engineering Hong Kong Polytechnic University Hung Hom Kowloon Hong Kong China

PM1.0 （fine particles, with diameter 〈 1 pm）, PM2.5 （fine particles, with diameter 〈 2.5μm） and PM10 （coarse particles, with diameter 〈 10 μm） were measured at 24-hour intervals near a high-traffic road in Hong kong, from October 2004 to September 2005. Mass concentrations were determined for the three particle fractions, averaging for PM1.0, PM2.5 and PM10, respectively, 44.5±18.4, 55.4±25.5 and 81.3±37.7μg·m^-3, PM2.5 was 3.7 times the U.S. EPA＇s annual NAAQS of 15 μg·m^-3,. Overall, PM1.0 accounted for 44 to 69% （average 57%） of PM10, while PM2.5 accounted for 58 to 82% （average 71%） in this study. The particulate masses showed obvious seasonal patterns with high concentrations in cold seasons and low in warm seasons, especially high concentrations of PM2.5-10 during the cold seasons. Diurnal variations of mass concentrations of PM2.5 were determined during July, showing two major peaks in the morning and afternoon rush hours.

关键词： PM1.0 PM2.5 PM10 seasonal variations roadside environment Hong kong

Optimization of thermophilic anaerobic-aerobic treatment system for Palm Oil Mill Effluent （POME）

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Frontiers of Environmental Science & Engineering 2015年第2期9卷 334-351页

作者： Yijing cHAN Meifong cHONG chunglim law Department of chemical and Environmental Engineering The University of Nottingham Malaysia Campus Selangor 43500 Malaysia

Optimization of an integrated anaerobic-aero- bic bioreactor （IAAB） treatment system for the reduction of organic matter （chemical Oxygen Demand （cOD）, Biochemical Oxygen Demand （BOD） and Total Sus- pended Solids （TSS） concentrations） in Palm Oil Mill Effluent （POME） to legal standards with high methane yield was performed for the first time under thermophilic condition （50~c-55~c） by using response surface meth- odology （RSM）. The experiments were conducted based on a central composite rotatable design （ccRD） with three independent operating variables, organic loading rates in anaerobic compartment （OLRan） and mixed liquor volatile suspended solids （MLVSS） concentration in anaerobic （MLVSSa,） and aerobic compartments （MLVSSa）. The optimum conditions for the POME treatment were determined as OLRan of 15.6 g cOD＇L-I＂d-1, MLVSSan of 43100mg.L l, and MLVSSa of 18600mg.L-1, where high aerobic cOD, BOD and TSS removal efficiencies of 96.3%, 97.9%, and 98.5% were achieved with treated BOD of 56mg.L1 and TSS of *** meeting the discharge standard. This optimization study successfully achieved a reduction of 42% in the BOD concentrations of the final treated effluent at a 48% higher OLRan as compared to the previous works. Besides, thermophilic IAAB system scores better feasibility and higher effectiveness as compared to the optimized mesophilic system. This is due to its higher ability to handle high OLR with higher overall treatment efficiencies （more than 99.6%）, methane yield （0.31 L cH4＂ gl cODremoved） and purity of methane （67.5%）. Hence, these advantages ascertain the applicability ofthermophilic IAAB in the POME treatment or even in other high-strength wastewaters treatment.

关键词： palm oil mill effluent (POME) anaerobic aerobic thermophilic biogas optimization