检索结果-南通市图书馆

Establishing the Method for Assessing Flood Vulnerability in Ho Chi Minh City, Vietnam A Case Study in District 6

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Environmental Science and Engineering(B) 2018年第2期7卷 72-82页

作者： Tran thi diem Loan Can Thu VOXI Nguyen Thanh Son Do thi Hong Hoa Insitute for Environment and Resources Vietnam National University Ho Chi NinhHCM City 700000Vietnam Ho Chi Minh City University of Natural Resources and Environment HCM City 700000Vietnam Ha Noi University of Science Vietnam National University Ha NoiHa Noi 100000Vietnam Vietnam Academy of Science and Technology HaVoi 100000Vietnam

Urban flooding has impacted siginficantly on people＇s living： economic development, environmental pollution, etc.. It has been the serious problem of many cities in file world, especially in urban areas in developing countries because urbanization is too fast but lack of adaptive management planning and infrastructure. In Vietnam, the big cities, such as HCM （Ho Chi Minh） City, Hanoi, etc. have also been influenced severely by floods. By early 2017, HCM City has 171 flooded sites assigned by the district level; 40 submergence points assigned by Steering Center of Flooding Control Program, and 9 tidal flooded points. The paper will establish a suitable method for assessing flood vulnerability in HCM City from natural, social and environmental aspects. The results of a case study in District 6 show that there are four wards with high vulnerability and 10 wards with average vulnerability.

关键词： Vulnerability flooding District 6 HCM City.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

稻壳制备活性炭联产二氧化硅工艺

过程工程学报 2015年第4期15卷 670-676页

作者：孔艳姚常斌曾鸣初茉 Vo thi diem Kieu 许光文中国矿业大学(北京)化学与环境工程学院北京100083 中国科学院过程工程研究所多相复杂系统国家重点实验室北京100190 胡志明科技大学胡志明70000

采用物理法将稻壳炭化,炭化料用酸碱处理,固体残渣经高温水蒸汽活化制备活性炭,脱灰液体采用沉淀法制备Si O2.结果表明,用2.5 mol/L Na OH溶液按液固比10 m L/g脱灰的炭化料所制活性炭比表面积为961.8 m2/g,比不脱灰炭化料所制活性炭增... 详细信息

采用物理法将稻壳炭化,炭化料用酸碱处理,固体残渣经高温水蒸汽活化制备活性炭,脱灰液体采用沉淀法制备Si O2.结果表明,用2.5 mol/L Na OH溶液按液固比10 m L/g脱灰的炭化料所制活性炭比表面积为961.8 m2/g,比不脱灰炭化料所制活性炭增加136%,总孔容积增加103.8%,对碘和亚甲基蓝的吸附容量分别为1270和300 mg/g.在10%HCl、煅烧温度600℃条件下所制Si O2粒径为40?60 nm,为无定型结构,比表面积达330 m2/g,纯度达99.84%.

关键词：稻壳活性炭二氧化硅酸处理碱处理生物质残渣

HSK Online（Super Test）汉语学习软件对越南人词汇学习影响的研究

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

HSK Online（Super Test）汉语学习软件对越南人词汇学习影响的研...

作者： NGUYEN thi diem KIEU（阮氏艳娇）重庆交通大学

学位级别：硕士

随着经济和科技的发展,中国的影响力日渐增强,外国人学习汉语的需求越来越大,因此将汉语传播到世界其他地方也成为必需。在“走出去”战略的影响下,国际汉语教育得到了多方面的推动,其中就有互联网的助力。为响应工业革命4.0的影响,一... 详细信息

随着经济和科技的发展,中国的影响力日渐增强,外国人学习汉语的需求越来越大,因此将汉语传播到世界其他地方也成为必需。在“走出去”战略的影响下,国际汉语教育得到了多方面的推动,其中就有互联网的助力。为响应工业革命4.0的影响,一系列在线汉语学习产品得以普及,例如汉语学习辅助软件/APP、线上课堂工具等,它们为全球广大汉语学习者带来了极大便利,提高了学习者的学习效率。在越南,HSK Online(Super Test)汉语学习软件被认为是比较值得使用的软件之一。该软件不仅可以在短时间内增加学习者词汇量这方面影响最为深远,还可以帮助学习者提高词汇知识,让学习者轻松理解词汇含义并在真实交流情境中准确地使用,让学习词汇变得更加容易。本研究在查阅了大量词汇学习和汉语学习软件研究的相关文献后,将在网络数据、Android和i OS的应用库上收集用户评价数据以及对不同学习背景的用户发放问卷调查,发现:(1)HSK Online(Super Test)汉语学习软件在越南很受欢迎;(2)通过专门设计的辅助功能,该软件可以逐步提升学习者的词汇量,让学习者学会运用新学的生词来造句与完成作业,确保自己的汉语运用能力更加地道;(3)虽然该软件还存在一些不足,如对免费用户的限制及内容设置还不完善等,但不可否认该软件在同类软件中仍具优势。通过用户评论,结合研究结论,本文最后对改进软件的内容和界面提出了一些建议,以帮助该软件在性能方面能够得以完善。

关键词：汉语学习软件 HSK Online(Super Test) 越南人词汇学习

Studying on Tyrosinase Inhibition Activity of Some Vietnamese Folk Plants Aims to Use in Skin-Whitening Cosmetics

同方学位论文库评论

在线全文

同方学位论文库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2017年第6期8卷 1319-1328页

作者： Nguyen thi My Hanh Nguyen Kim Phi Phung Quach Ngo diem Phuong Department of Plant Biotech and Biotransformation Faculty of Biology-Biotechnology University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Department of Organic Chemistry Faculty of Chemistry University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam

White mulberry Morus alba and jackfruit Artocarpus heterophyllus are two of seven chosen Vietnamese folk plants which showed the highest tyrosinase inhibition activity. Besides, both of them showed antioxidant and antibacterial activities. Especially, the Sulforhodamine B (SRB) assay test result of the root core extract of M. alba figured out its non-toxicity on foreskin fibroblasts.

关键词： Morus alba Tyrosinase Inhibition Activity Antibacterial Antioxidant

软木塞基碳量子点的水热合成及其生物相融荧光成像应用

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

新型炭材料 2022年第3期37卷 595-602页

作者： Quang Ngo Khoa Hieu Nguyen Ngoc Bao Vo Van Quoc Phuoc Vo thi Ngoc Le Xuan diem Doc Luong Quang Tri Nguyen Minh Son Le Vu Truong Son Le Van Thanh Ha Che thi Cam University of Sciences Hue University77 Nguyen HueHueVietnam Faculty of Environmental and Natural Sciences Duy Tan UniversityDa Nang550000Vietnam Institute for Research and Training in Medicine Biology and PharmacyDuy Tan UniversityDa Nang550000Vietnam University of Agriculture and Forestry Hue University102 Phung HungHueVietnam University of Science and Education The University of Da Nang459 Ton Duc ThangLien ChieuDa NangVietnam

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。... 详细信息

以废弃酒瓶软木塞为原料,采用低成本、简单的水热方法合成碳量子点。通过TEM、FTIR、Raman、UV-Vis、PL光谱对碳量子点的结构和光学性能进行分析表征。结果表明,碳量子点的平均直径为6.2±2.7 nm,PL激发谱和碳量子点表面的官能团有关。用硫酸奎宁作为参考,碳量子点的量子效率为1.54%。将获得的碳量子点应用在骨髓间充质干细胞的细胞生物成像上,发现用碳量子点处理后,骨髓间充质干细胞分别在320~380 nm、450~490 nm和450~490 nm范围显示绿色、黄色和红色荧光,表明了碳量子点在荧光成像领域具有潜在的应用价值。

关键词：碳点水热合成荧光荧光图像废酒瓶塞

Spearfishing-induced behavioral changes of an unharvested species inside and outside a marine protected area

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Current Zoology 2016年第1期62卷 39-44页

作者： diem Samantha C. TRAN Katharine A. LANGEL Madison J. THOMAS Daniel T. BLUMSTEIN Department of Ecology and Evolutionary Biology University of California Los Angeles Los Angeles CA90095-1606 USA

By prohibiting fishing, marine protected areas （MPAs） provide a refuge for harvested species. Humans are often perceived as predators by prey and therefore respond fearfully to humans. Thus, fish responses to humans inside and outside of an MPA can provide insights into their perception of humans as a predatory threat. Previous studies have found differences in the distance that har- vested species of fish initiate flight （flight initiation distance--FID） from humans inside and outside an MPA, but less is known about unharvested species. We focused on whether the lined bristle- tooth Ctenochaetus striatus, an unharvested surgeonfish, can discriminate between a snorkeler and a snorkeler with a spear gun inside and outside of a no-take MPA in Mo＇orea, French Polynesia. Additionally, we incorporated starting distance （the distance between the person and prey at the start of an experimental approach）, a variable that has been found to be important in as- sessing prey escape decisions in terrestrial species, but that has not been extensively studied in aquatic systems. Lined bristletooth FID was significantly greater in the presence of a spear gun and varied depending on if the spear gun encounter was inside or outside of the MPA. These results imply a degree of sophistication of fish antipredator behavior, generate questions as to how a non- targeted species of fish could acquire fear of humans, and demonstrate that behavioral surveys can provide insights about antipredator behavior.

关键词： fear flight initiation distance learning marine protected area spearfishing starting distance.

Phytochemical Constituents and Determination of Resveratrol from the Roots of <i>Arachis hypogea</i>L.

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal of Plant Sciences 2013年第12期4卷 2351-2358页

作者： Tuyen Pham Nguyen Kim Nga Vo thi Phuong Tran Van Phuong Quach Ngo diem Duong Ngo thi Thuy Quang Ton That Phung Nguyen Kim Phi Department of Chemical Technology Faculty of Chemical-Food Technology University of Technical Education Ho Chi Minh City Ho Chi Minh City Vietnam Department of Organic Chemistry Faculty of Chemistry University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Department of Plant Biotech and Biotransformation Faculty of Biology University of Science Vietnam National University-Ho Chi Minh City Ho Chi Minh City Vietnam Faculty of Environmental Science Sai Gon University Ho Chi Minh City Vietnam

Two triterpenoid saponins, 6, 7, together with five known compounds were isolated from the roots of Arachis hypogea L. collected in Vietnam. Their structures were established by spectroscopic analysis (1D, 2D NMR and HRMS) as well as by comparison with those reported in the literature. Furthermore, the high content of resveratrol in the roots opens a new potential resource for pharmaceutical companies to prepare medicines from the wasted peanut roots.

关键词： Arachis hypogea L. Peanut Resveratrol Triterpenoid Glycoside

Lévy过程与无限时滞的脉冲中立型随机微积分方程(英文)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

南京师大学报（自然科学版） 2013年第4期36卷 14-21页

作者： diem Dang Huan 南京师范大学数学科学学院江苏南京210023 北江农林大学基础科学学院

本文研究了一类Lévy过程与无限时滞的脉冲中立型随机微积分方程(NISIEIL).首先,在一类广义利普布茨条件下,我们通过逐次逼近建立了布尔伯特空间中NISIEIL温和解的存在唯一性.其次,我们给出了解对初始值的连续依赖性.改进并推广了已有... 详细信息

本文研究了一类Lévy过程与无限时滞的脉冲中立型随机微积分方程(NISIEIL).首先,在一类广义利普布茨条件下,我们通过逐次逼近建立了布尔伯特空间中NISIEIL温和解的存在唯一性.其次,我们给出了解对初始值的连续依赖性.改进并推广了已有的结果.

关键词：预解算子中立型随机微积分方程相空间脉冲温和解

The Effects of Nutritional Media and Initial Cell Density on the Growth and Development of Spirulina platensis

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Agricultural Science and Technology(A) 2017年第B10期7卷 60-67页

作者： Nguyen Van Khanh Nguyen thi diem Le thi tuyet Nhan Phan Van Cu Tran Quang Khanh Van Ngo thi Hoan Institute of Biotechnology Hue UniversityPhu ThuongPhu VangThua Thien Hue 530000Vietnam Faculty of Fisheries University of Agriculture and ForestryHue University102 Phung Hung StreetHue 530000Vietnam Faculty of Fisheries Ha Long University258 Bach Dang StreetUong Bi City 207900Quang NinhVietnam

The main objective of the study was to determine the effects of nutritional media and initial cell density on the growth and development of Spirulina *** study was carried out at the Center for Incubation and Technology Transfer,Hue University from May 2015 to August *** the first experiment,*** was cultured in four different nutritional media,including Zarrouk,Spi-RIA3,Nisole and Thuoc medium(Vietnamese).Resulted showed that *** grew significantly in the Zarrouk medium rather than in other nutritional medium at the same time,and gained the maximum density of 2,736.5 mg/L after 13 d inoculums,with specific growth rate of 4.987%per day and the time to doubling population of 0.139 *** the second experiment,*** was cultured in six different initial cell densities:100,400,700,1,000,1,300 and 1,600 mg/L,and the optimum nutritional medium was Zarrouk medium selected from experiment *** showed at the initial culture density of 400 mg/L,the highest biomass was gained with the maximum density of 3,071.2 mg/L after 21 d inoculums,with specific growth rate of 9.15%per day and time to double population of 0.076 *** biomass from culture in Zarrouk medium at initial cell density 400 mg/L obtained total protein of 51.98%,total lipid of 1.75%,total carbohydrate of 0.75%,carotene of 0.36%and total minerals of 5.2%,on a basis of dry matter.

关键词： Spirulina platensis nutrient medium initial density growth rates