Vietnam Journal of Science, Technology and Engineering最新文献_第5页

Evaluating the impacts of climate change on the hydrologyand water resource availability in the 3S river basin of Cambodia, Laos, and Vietnam 气候变化对柬埔寨、老挝和越南3S河流域水文水资源有效性的影响评价

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-12-31 DOI: 10.31276/vjste.62(4).77-86

N. Trang, S. Shrestha, H. Ishidaira, Pham Thi Thao Nhi

引用次数: 1

The zoning of surface water quality by WQI index in the Tien Giang province, Vietnam 用WQI指数划分越南天江省地表水水质

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-12-31 DOI: 10.31276/vjste.62(4).71-76

N. Anh, Ngoc H. Bui

引用次数: 0

Application of remote sensing in evaluating the PM10 concentration in Ho Chi Minh city 遥感在胡志明市PM10浓度评价中的应用

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-12-31 DOI: 10.31276/vjste.62(4).87-94

T. Duy, Duongthi Thuy Nga

引用次数: 0

Nutrients in sediment regulate benthic algal assemblages in the tropical Tri An reservoir of Vietnam 沉积物中的营养物质调节着越南热带三安水库的底栖藻类组合

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-12-31 DOI: 10.31276/vjste.62(4).43-48

T. Tran, T. Tran, X. Ngô, T. Pham

引用次数: 0

The antifungal activity of essential oils from some plants in Vietnam against the pathogenic fungi Candida albicans and Aspergillus fumigatus 越南几种植物精油对病原菌白色念珠菌和烟曲霉的抑菌活性

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).70-75

Vũ Xuân Tạo, Trần Bảo Trâm, N. Hien, T. H. Dung, T. Tuan

{"title":"The antifungal activity of essential oils from some plants in Vietnam against the pathogenic fungi Candida albicans and Aspergillus fumigatus","authors":"Vũ Xuân Tạo, Trần Bảo Trâm, N. Hien, T. H. Dung, T. Tuan","doi":"10.31276/VJSTE.62(3).70-75","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).70-75","url":null,"abstract":": Vietnam possesses an abundant and highly diverse resource of plants. Therefore, the search and evaluation of bioactive compounds extracted from these plants are a potential research direction to support developing products that improve human health. The purpose of this study is to assess the antifungal activity of some essential oils produced by materials harvested in Vietnam such as King orange peel ( Citrus sinensis ), lemongrass ( Cymbopogon flexuosus ), peppermint ( Mentha arvensis ), and betel leaf ( Piper betle ). The antifungal effect of these essential oils was determined by the Kirby-Bauer disc diffusion technique. In addition, the antifungal properties of the essential oils were also assessed through their effects on the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . The results demonstrated that all peppermint, lemongrass, and betel leaf essential oils showed antifungal activity against C. albicans and A. fumigatus . Especially, betel leaf essential oil could perform antifungal activity at a low dilution concentration of 10% and could also inhibit the reproduction of C. albicans and the spore germination, mycelium elongation, and sporulation of A. fumigatus . Meanwhile, orange peel essential oil did not exhibit any antifungal properties.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"77 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78216556","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A study on the effects of sea level rise on mangrove ecosystem in Giao Thuy district, Nam Dinh province 海平面上升对南定省乔绥地区红树林生态系统影响的研究

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).90-96

V. D. Vu, H. Pham, T. Bui

{"title":"A study on the effects of sea level rise on mangrove ecosystem in Giao Thuy district, Nam Dinh province","authors":"V. D. Vu, H. Pham, T. Bui","doi":"10.31276/VJSTE.62(3).90-96","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).90-96","url":null,"abstract":": Climate change and sea level rise (SLR) have greatly affected the coastal land use of the Nam Dinh province. It has especially impacted the mangrove forests in coastal plain areas. According to the monitoring data from management units, saline intrusion due to SLR tends to expand in scope, affecting and reducing the area of mangrove ecosystems. From this situation, it can be seen that the impact assessment and estimation of economic loss in coastal provinces such as Nam Dinh is incredibly necessary to help the localities proactively respond to climate change and SLR, which is in line with the national target program on climate change. This research, which uses methods of evaluating economic values, aims to quantitatively assess the extent of damage caused by SLR on an area of mangrove forests in Giao Thuy district, Nam Dinh province. The valuation of these impacts will provide a basis for scientists, research institutions, and localities to proactively mitigate and adapt to climate change. Research results show the damage of climate change and SLR to the coastal mangrove forests in Giao Thuy and the risk to agricultural land use in the Nghia Hung and Hai Hau districts. These results also provide warning of the potential damage caused by SLR to dike and irrigation systems in the coastal districts of the Nam Dinh province, which follow Xuan Truong, Giao Thuy, Hai Hau, and Nghia Hung.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79965087","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Chemical constituents isolated from stems of Maesa membranacea 膜菜茎中分离的化学成分

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).15-18

T. L. Nguyen, H. G. Tran, Thi Kim Oanh Vu, T. Pham, Ngoc Thuc Dinh, Anna Stojakowska, Bich Ngan Truong

{"title":"Chemical constituents isolated from stems of Maesa membranacea","authors":"T. L. Nguyen, H. G. Tran, Thi Kim Oanh Vu, T. Pham, Ngoc Thuc Dinh, Anna Stojakowska, Bich Ngan Truong","doi":"10.31276/VJSTE.62(3).15-18","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).15-18","url":null,"abstract":"Maesa membranacea A. DC. (Myrsinaceae) is an evergreen shrub that grows in China, Vietnam, and Cambodia. in Vietnam, the leaves and roots of this species have been used as traditional medicine for the treatment of fever and hepatitis [1]. Many Maesa plants have also been used as a folk remedy in African and Asian countries. Previous chemical studies on the Maesa species have revealed the presence of quinone, saponin triterpenoid, and flavonoid compounds [2-5]. The plant’s extracts and chemical constituents have displayed various pharmacological properties such as anticancer, antimicrobial, antiviral, and anti-leismania activity [2-5]. However, until now, no chemical study has been reported on Maesa membranacea. in this paper, we report the isolation and structure elucidation of six compounds including kaempferol (1), (-)-epicatechin (2), betulinic acid (3), p-hydroxybenzoic acid (4), vanilic acid (5), and protocatechuic acid (6) from the stems of Maesa membranacea. The structures of these compounds have been determined by NMR, MS analysis, and comparison with previously reported studies.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"71 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75357000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Comparison and applicability of Agilent EMR-Lipid and Captiva EMR-Lipid Sorbents in QuEChERS method for food analysis 安捷伦emr -脂质吸附剂与Captiva emr -脂质吸附剂在QuEChERS食品分析方法中的比较与适用性

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).19-25

Q. H. Le, Tsl Hi-Tech Training, Nguyễn Ngọc Trân, Thi Cam Tuyen Nguyen, H. Nguyen, Kien Trieu Lac, Thi Ngoc Anh Pham, Pham Ngoc Son Chu

{"title":"Comparison and applicability of Agilent EMR-Lipid and Captiva EMR-Lipid Sorbents in QuEChERS method for food analysis","authors":"Q. H. Le, Tsl Hi-Tech Training, Nguyễn Ngọc Trân, Thi Cam Tuyen Nguyen, H. Nguyen, Kien Trieu Lac, Thi Ngoc Anh Pham, Pham Ngoc Son Chu","doi":"10.31276/VJSTE.62(3).19-25","DOIUrl":"https://doi.org/10.31276/VJSTE.62(3).19-25","url":null,"abstract":": Agilent’s innovative EMR-Lipid and Captiva EMR-Lipid sorbents efficiently replace the traditional QuEChERS d-SPE clean-up products in selective lipid removal from fatty matrices, thus improving instrumental analytical reproducibility, reliability, and long-term use. These products have dual functionality; a hydrophobic interaction between the sorbent with long aliphatic lipid chains of the matrices, which allows for complete lipid retention, and a size exclusion property that does not retain analytes, thus this maximizes, in principle, analyte recovery in any sample. As most of the analytes under study were polar or not highly nonpolar and had a relatively large size, the examination of small-sized nonpolar or less polar compounds is necessary to check for partial retention by the sorbents and if any, further precautions should be taken when using these sorbents. These queries are answered in our present communication concerning the analytes Trifluralin (logP: 5.27), Fipronil (logP: 4.0), and Clenbuterol (logP: 2.63).","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"84 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79651516","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Identification, structural characterization, and in silico expression analysis of the sucrose transporter ’SWEET’ gene family in peanut (Arachis hypogaea) 花生蔗糖转运蛋白SWEET基因家族的鉴定、结构特征及基因表达分析

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).62-67

Quynh Lê, Yen Hoang, T. Pham, Honggui La, N. T. Nguyen, Anh Xuan Duong, Thao Lê, L. H. Le, H. X. Pham, H. Chu

引用次数: 1

Water balance for agriculture production in the dry seasons of the Mekong river delta in Vietnam 越南湄公河三角洲旱季农业生产的水平衡

Vietnam Journal of Science, Technology and Engineering Pub Date : 2020-09-30 DOI: 10.31276/VJSTE.62(3).56-61

A. Le

引用次数: 4