Vietnam Journal of Science, Technology and Engineering最新文献_第9页

Temperate fruits in the northern mountainous region: scientific results achieved and solutions for development in coming years 北方山区温带水果:取得的科学成果和今后几年发展的解决办法

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).19-24

M. H. Vu, Q. Bui, Q. Nguyen, Van Nguyen, Fruits

引用次数: 1

A case study of phytoplankton used as a biological index for water quality assessment of Nhu Y river, Thua Thien - Hue 顺化-顺化Nhu Y河浮游植物作为水质评价生物指标的案例研究

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).45-51

Thi Hong Trang Le, Q. D. Luong, T. Vo, V. T. Nguyen

{"title":"A case study of phytoplankton used as a biological index for water quality assessment of Nhu Y river, Thua Thien - Hue","authors":"Thi Hong Trang Le, Q. D. Luong, T. Vo, V. T. Nguyen","doi":"10.31276/VJSTE.60(4).45-51","DOIUrl":"https://doi.org/10.31276/VJSTE.60(4).45-51","url":null,"abstract":"Studies of the composition and density of phytoplankton and the water quality of Nhu Y river were conducted over six months (March to August 2011). Phytoplankton samples were collected by filtration and immediately preserved in Lugol’s solution. The phytoplankton species composition recorded 117 species belonging to six divisions: Cyanobacteria (24 taxa), Bacillariophyta (14 taxa), Chlorophyta (45 taxa), Euglenophyta (31 taxa), Cryptophyta (2 taxa), and Dinophyta (1 taxa), of which Chlorophyta and Euglenophyta were dominant in terms of species numbers. The total phytoplankton density fluctuated from 110,146 to 5,964x103individuals/litre and Cyanophyta were dominant in terms of individual density. The algal genus pollution index (Palmer index) ranged from 30 to 41, indicating that the water was highly organically polluted, and the Shannon-Weiner index results of 0.66-2.92 showed moderately to heavily polluted water. With values for the Diatomeae index of more than 0.2, the quality of the eight sites during the period of the study showed that the aquatic environment was eutrophic. Phytoplankton and their indexes are useful tools for assessing water environment quality.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85444125","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: 1

Species composition and distribution of brachyuran crabs in Duyen Hai town, Tra Vinh province 特腊省Duyen Hai镇短爪蟹的种类组成及分布

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).39-44

V. Le, V. T. Nguyen, N. D. Tran, Damin Lee, Won-Taek Kim, V. Dang, Doan Dang Phan, D. T. Luong

引用次数: 2

Influence of microalgae retention time on biomass production in membrane photobioreactor using human urine as substrate 微藻停留时间对人尿为底物膜光生物反应器生物质生产的影响

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).66-70

N. Thuan, N. Thuy, N. H. Hai, N. Nguyen, X. Bui

引用次数: 3

Water quality assessment using the Pollution Index (PI) and statistical tools: a case study of Thi Vai river, Dong Nai, Vietnam 使用污染指数和统计工具进行水质评价:以越南同奈的Thi Vai河为例

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).71-77

T. Nguyen

{"title":"Water quality assessment using the Pollution Index (PI) and statistical tools: a case study of Thi Vai river, Dong Nai, Vietnam","authors":"T. Nguyen","doi":"10.31276/VJSTE.60(4).71-77","DOIUrl":"https://doi.org/10.31276/VJSTE.60(4).71-77","url":null,"abstract":"The quality of river water is influenced by two factors: nature and man. The aims of this paper are to determine the influence of anthropogenic sources of pollution on water quality, by assessing integrated measurements from use of the Pollution Index (PI) of Indonesia and diverse statistical techniques, including one-way analysis of variance (ANOVA) and ArcGIS. In this study, 10 physicochemical parameters for the determination of water quality, from surface water taken the Thi Vai river, are examined: dissolved oxygen (DO), biochemical oxygen demand (BOD5), chemical oxygen demand (COD), ammonium (NH4+-N), phosphate (PO43--P); total dissolved solids (TSS), pH, nitrite (NO2-), nitrate (NO3-), total coliforms, and fecal E. coli. The samples were collected from seven monitoring sites, for assessing spatial and temporal water quality, in the three years 2015 to 2017. The findings revealed that water quality index values within the study area showed a significant pollution level for nitrite, and fecal E. coli. Water quality was detrimental at the sites TV2, TV3, and TV4. A further finding was that there was significant variation recorded between the two methods of measuring PI - that of the Ministry of the Environment, Indonesia, and that of Vietnam. Finally, this integrated technique could, it is suggested, be an effective approach for communicating information on water quality for sustainable waste management in Thi Vai river.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78817827","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

Establishing a molecular protocol for detection of EGFR mutations in patients with non-small cell lung cancer 建立非小细胞肺癌患者EGFR突变检测的分子方案

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).31-38

Thi Minh Kha Nguyen, Quoc-Dang Quan, Thi Hue Hanh Nguyen, H. Nguyen

{"title":"Establishing a molecular protocol for detection of EGFR mutations in patients with non-small cell lung cancer","authors":"Thi Minh Kha Nguyen, Quoc-Dang Quan, Thi Hue Hanh Nguyen, H. Nguyen","doi":"10.31276/VJSTE.60(4).31-38","DOIUrl":"https://doi.org/10.31276/VJSTE.60(4).31-38","url":null,"abstract":"Lung cancer is one of the quickest and most fatal diseases and is divided into two types: small cell lung cancer (SCLC) and non-small cell lung cancer (NSCLC). Approximately 50% of NSCLC patients harbour mutations in the epidermal growth factor receptor(EGFR) gene, spanning from exon 18 to exon 21, which are responsible for the tyrosine kinase domain of the EGFR protein. Currently, gefitinib and erlotinib are two drugs inhibiting EGFR which are used in the treatment of lung cancer. The indication for use of these drugs depends on the mutation status of EGFR. Resistance to treatment with these two drugs has been found with mutations in exon 20; however, mutations in exon 18, 19, 21 benefited from the same treatment. Therefore, we built a molecular protocol for detecting mutations in exon 21 of EGFR in NSCLC patients in Vietnam which, in this study, is based on the real-time polymerase chain reaction high resolution melting (PCR HRM) technique. We successfully designed pairs of primers for the real-time PCR HRM technique to detect mutations in exon 21 and for the Sanger sequencing method to confirm the real-time PCR HRM results. We also investigated the optimal concentration of MgCl2 for the real-time PCR HRM protocol. Performance characteristics of the real-time PCR HRM protocol were evaluated in terms of specificity, limit of detection, repeatability, and it showed good results. Finally, we applied the molecular protocol to 172 clinical samples and compared these with the Sanger nucleotide sequencing method and the peptide nucleic acid (PNA) clamping method. The results of the comparison demonstrate that the molecular protocol constructed for detection of exon 21 mutations can be used in the treatment of NSCLC patients.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90397827","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

Assessment of storm surge risk in aquaculture in the Northern coastal area of Vietnam 越南北部沿海地区水产养殖风暴潮风险评估

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).89-94

X. H. Nguyen, Xuan Nguyen, H. Nguyen, T. Tran, Duc Hung Le

引用次数: 1

Influence of inoculum size, CO2 concentration and LEDs on the growth of green microalgae Haematococcus pluvialis Flotow 接种量、CO2浓度和led对雨红球藻生长的影响

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).59-65

Khac Tam Pham, T. Nguyen, Thi Ha Luong, P. H. Dang, D. C. Vu, T. N. Do, Thi Cam Mien Phi, D. Nguyen

{"title":"Influence of inoculum size, CO2 concentration and LEDs on the growth of green microalgae Haematococcus pluvialis Flotow","authors":"Khac Tam Pham, T. Nguyen, Thi Ha Luong, P. H. Dang, D. C. Vu, T. N. Do, Thi Cam Mien Phi, D. Nguyen","doi":"10.31276/VJSTE.60(4).59-65","DOIUrl":"https://doi.org/10.31276/VJSTE.60(4).59-65","url":null,"abstract":"Green microalgae Haematococcus pluvialis is best known for astaxanthin production. The cultivation of H. pluvialis involves two main phases, namely green vegetative stage and cyst stage with astaxanthin accumulation. In fact, the growth of H. pluvialis in the vegetative stage is one of the most important parts in the entire cultivation process. The aim of the study is to investigate the influence of temperature, inoculum size, CO2 concentration and light emitting diodes (LEDs) on the specific growth rate, cell density and dry weight of H. pluvialis in the vegetative stage. Results indicated that the temperature from 25 to 280C and the inoculum size from 3×104 cells.ml-1 were suitable for the growth of the studied strain. Illumination with red light LEDs (630 nm) at 80 μE.m-2.s-1, the highest specific growth rate (μ) was 0.197 day-1 and the maximal density was of 2.87×105 cells.ml-1. A concentration of 5% CO2 (v/v) was the optimal dose for the growth of this strain. Under the condition of both 5% CO2 and illumination with red light LEDs at 80 μE.m-2.s-1, the specific growth rate was 0.242 day-1 and the cell density was 4.28×105cells.ml-1. Illumination with only blue LEDs (430 nm) at 120 μE.m-2.s-1 stimulated the astaxanthin accumulation with a maximum content at 2.36 μg.ml-1.","PeriodicalId":23548,"journal":{"name":"Vietnam Journal of Science, Technology and Engineering","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87688079","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: 9

Adsorption of Cr(VI) by material synthesized from red mud and rice husk ash 赤泥与稻壳灰合成材料对铬(VI)的吸附

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).03-07

Thi Yen Nguyen, P. Nguyen, Thi Thuy Nguyen, Tri Nguyen, K. Huynh

引用次数: 2

Projection of saline intrusion into groundwater in the context of climate change in the coastal zone of Ha Tinh province 河静省沿海地区气候变化背景下盐水渗入地下水的预测

Vietnam Journal of Science, Technology and Engineering Pub Date : 2018-12-17 DOI: 10.31276/VJSTE.60(4).82-88

V. D. Nguyen, T. Do, K. Nguyen

引用次数: 0