Journal of Science Natural Science最新文献_第4页

A NOTE ON S. TAKAHASHI’S ARTICLE 关于高桥先生文章的注释

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0036

引用次数: 0

DETERMINATION OF SOME NUTRITIONAL COMPONENTS AND SENSORY CRITERIA OF IGNAME YAM IN BAC GIANG PROVINCE (Dioscorea esculenta) 江北薯蓣(薯蓣)部分营养成分及感官指标的测定

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0046

Loi Nguyen Van, Tuan Le Anh, Hanh Trang Do Thi

{"title":"DETERMINATION OF SOME NUTRITIONAL COMPONENTS AND SENSORY CRITERIA OF IGNAME YAM IN BAC GIANG PROVINCE (Dioscorea esculenta)","authors":"Loi Nguyen Van, Tuan Le Anh, Hanh Trang Do Thi","doi":"10.18173/2354-1059.2022-0046","DOIUrl":"https://doi.org/10.18173/2354-1059.2022-0046","url":null,"abstract":"Igname yams are agricultural products with high economic and nutritional value. Igname yam plants are grown a lot in our country, especially in Bac Giang province. The aim of this study was to the determination of nutritional components and sensory of igname yam in Bac Giang province. Research results have identified water content in igname yam is 69.3 ± 0.2%, total lipid content is 4.2 ± 0.1%, total glucide content is 20.5 ± 0.1%, total protein content was 2.6 ± 0.1%, vitamin B1 was 28.5 ± 0.1mg% and vitamin B2 was 12.3 ± 0.1mg%. Besides, the content of minerals, such as Ca, Mg, Mn, P, K, Na, Zn, Cu, S, and Fe, fluctuates in the range of 1.4 to 34mg%. By the HPLC method, 17 amino acids have been identified in igname yam. Among those, there were 9 non-substituting amino acids, including histidine, arginine, threonine, valine, methionine, lysine, isoleucine, leucine, and phenylalanine. The igname yam meat has an ivory white color, a characteristic aroma, a fatty taste, a spongy and friable structure. These are important scientific bases for selecting igname yam for processing food products.","PeriodicalId":17007,"journal":{"name":"Journal of Science Natural Science","volume":"20 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83354685","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

DIVERSITY OF WILD MEDICINAL PLANTS IN THE VEGETABLE CULTIVATION AREAS IN THUONG TIN DISTRICT, HANOI CITY 河内市通田区蔬菜种植区野生药用植物的多样性

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0047

Linh Nguyen Ha, Lien Nguyen Thi Hong

引用次数: 0

CURRENT BIODIVERSITY AND THE CHALLENGES FOR BIODIVERSITY CONSERVATION IN THE PU MAT NATIONAL PARK 普马特国家公园生物多样性现状及保护面临的挑战

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0053

Nhung Tran Thi, H. Nguyen Van, Cam Lai Vinh, Nhat Vuong Hong, Hiền Nguyễn Thị Thu, Thao Nguyen Phuong, Thanh Nguyen Duc, Quan Luong Viet

{"title":"CURRENT BIODIVERSITY AND THE CHALLENGES FOR BIODIVERSITY CONSERVATION IN THE PU MAT NATIONAL PARK","authors":"Nhung Tran Thi, H. Nguyen Van, Cam Lai Vinh, Nhat Vuong Hong, Hiền Nguyễn Thị Thu, Thao Nguyen Phuong, Thanh Nguyen Duc, Quan Luong Viet","doi":"10.18173/2354-1059.2022-0053","DOIUrl":"https://doi.org/10.18173/2354-1059.2022-0053","url":null,"abstract":"This research synthesizes the most advanced progress on biodiversity in recent decades to develop a set of information about the current condition of biodiversity in the Pu Mat national park. Data was collected from reliable documents nationally, updated statistics, and maps from management committees associated with field surveys in the study area. After implementing data synthesis, analysis, and inheritance from the previous related research and using a geographic information system (GIS), the findings indicated that: 1) Pu Mat National Park protects the rare genetic resources of Vietnam, which include 2600 floral species, 1121 animal species, and four typical ecosystems of evergreen- broadleaf natural forest, mixed wood-bamboo ecosystem, natural bamboo ecosystem and grassshrubs ecosystem; 2) establishing an ecosystem map based on the integration of the forest current maps, forest inventory maps, land use current maps in Pu Mat National Park area, scale 1:50,000; and 3) identifying factors challenging in biodiversity conversation in Pu Mat national park. The main challenging factors present, (1) the need of using biodiversity resources; (2) the urbanization process; (3) the interference with the environment and habitat from human beings; (4) climate change; and (5) the development of tourism. Understanding the current state of the study area and gaining a comprehensive understanding of biodiversity would allow for the most feasible and practical conservation strategies to be suggested for Pu Mat National Park.","PeriodicalId":17007,"journal":{"name":"Journal of Science Natural Science","volume":"182 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82331757","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

COHEN-MACAULAYNESS OF SOME EDGE-WEIGHTED GRAPHS 一些边加权图的Cohen-macaulayness

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0037

Diem Ly Thi Kieu, Nguyen Nguyen Phung

引用次数: 0

SODIUM SULFIDE-PROMOTED REACTION OF 2-AMINOBENZAMIDE AND BENZYL ALCOHOLS WITH ELEMENTAL SULFUR: A NOVEL APPROACH WITH 2-ARYL-QUINAZOLIN-4(3H) 硫化钠促进2-氨基苯甲酰胺和苯甲醇与单质硫的反应:2-芳基喹唑啉-4(3h)的新方法

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0044

Oanh Doan Thi Yen, Binh Vo Ngoc, Anh Ngo Quoc

引用次数: 0

OPTIMIZING GENOTYPING PROCEDURE AND DETERMINING FREQUENCY OF SINGLE NUCLEOTIDE POLYMORPHISM RS7799039 BELONGING TO LEP GENE IN FOUR-YEAR-OLD BOYS IN HANOI 河内地区4岁男孩lep基因rs7799039单核苷酸多态性基因分型方法优化及频率测定

Journal of Science Natural Science Pub Date : 2022-10-01 DOI: 10.18173/2354-1059.2022-0051

Thu Nguyen Thi Trung, Minh Pham Bui Quang, Tuyet Le Thi

{"title":"OPTIMIZING GENOTYPING PROCEDURE AND DETERMINING FREQUENCY OF SINGLE NUCLEOTIDE POLYMORPHISM RS7799039 BELONGING TO LEP GENE IN FOUR-YEAR-OLD BOYS IN HANOI","authors":"Thu Nguyen Thi Trung, Minh Pham Bui Quang, Tuyet Le Thi","doi":"10.18173/2354-1059.2022-0051","DOIUrl":"https://doi.org/10.18173/2354-1059.2022-0051","url":null,"abstract":"The LEP (leptin) gene plays an important role in the regulation of food intake and energy metabolism. The single nucleotide polymorphism (SNP) rs7799039 located in the promoter of the LEP gene may affect the risk of obesity and other diseases such as diabetes, cardiovascular disease, cancer, etc. due to altering the gene expression. The objective of this study is to find out the optimum procedure for genotyping SNP rs7799039 by using the polymerase chain reactionrestriction fragment length polymorphism (PCR-RFLP) method and determine the allele and genotype frequencies of this SNP in 61 four-year-old boys with normal nutritional status in Hanoi. The sequence of primers has been designed as follows: forward primer 5'-tttcctgtaattttcccatgag-3' and reverse primer 5'-aaagcaaagacaggcataaaa-3'. The thermal cycle for the PCR reaction includes initiation at 94 °C (3 minutes), 34 cycles of denaturation at 94 °C (30 seconds), annealing at 56 °C (30 seconds), extension at 72 °C (30 seconds), final extension at 72 °C (8 minutes), and then keep the products chilling at 4 °C. HhaI restriction enzyme was used to distinguish A and G alleles of rs7799039. PCR products are incubated with 0.5 µl HhaI restriction enzyme for 15 minutes at 37°C and then the products of restriction enzyme digestion are separated by gel electrophoresis. Genotype frequencies of our studied population are 62.3% AA, 31.1% AG, and 6.6% GG (P HWE = 0.452).","PeriodicalId":17007,"journal":{"name":"Journal of Science Natural Science","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84080902","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

CHANGES IN LIVING CONDITIONS, LIFESTYLE, AND BEHAVIORS OF HIGH SCHOOL STUDENTS DURING THE COVID-19 PANDEMIC IN VIETNAM 新冠肺炎疫情期间越南高中生生活条件、生活方式和行为的变化

Journal of Science Natural Science Pub Date : 2022-06-01 DOI: 10.18173/2354-1059.2022-0032

Dung Le Thi Thuy, Thuy Dao Thi, Thuong Nguyen Hoai, Tuyet Le Thi

引用次数: 0

DETERMINING THE THERMODYNAMIC DISSOCIATION CONSTANTS OF 5-BROMO-6,7-DIHYDROXY-N-METHYL-3-SULFOQUINOLINE IN AQUEOUS SOLUTION AT 25 OC BY POTENTIOMETRIC METHOD 用电位法测定了5-溴-6,7-二羟基- n -甲基-3-磺基喹啉在25℃水溶液中的热力学解离常数

Journal of Science Natural Science Pub Date : 2022-06-01 DOI: 10.18173/2354-1059.2022-0027

Nga Tran The, Anh Nguyen Thi Mai

引用次数: 0

ASSESSMENT OF IMPACTS OF THE ROAD SYSTEM ON FLOOD REGIME IN THE COASTAL FLOODING AREA OF VU GIA - THU BAN RIVER BASIN, QUANG NAM PROVINCE 广南省武家图班河流域沿海洪涝区道路系统对洪情的影响评价

Journal of Science Natural Science Pub Date : 2022-06-01 DOI: 10.18173/2354-1059.2022-0034

Son Hoang Thanh, Hanh Le Duc, Dang Vu Hai, Tuan Bui Anh, Yen Nguyen Thi Hai, Tuan Tong Phuc

{"title":"ASSESSMENT OF IMPACTS OF THE ROAD SYSTEM ON FLOOD REGIME IN THE COASTAL FLOODING AREA OF VU GIA - THU BAN RIVER BASIN, QUANG NAM PROVINCE","authors":"Son Hoang Thanh, Hanh Le Duc, Dang Vu Hai, Tuan Bui Anh, Yen Nguyen Thi Hai, Tuan Tong Phuc","doi":"10.18173/2354-1059.2022-0034","DOIUrl":"https://doi.org/10.18173/2354-1059.2022-0034","url":null,"abstract":"Flooding is one of the dangerous types of natural disasters, which has been causing great damage to human values and even human life, leading to negative impacts on socio-economic development, specifically in the lowland areas of the Vu Gia - Thu Bon river basin. The road system contributes to promoting intra-regional and inter-regional connectivity and is an important factor for socio-economic development. However, in certain cases, the road system continues to be expanded and enhanced, turning them into \"dyke systems\", interfering with the natural flood regime, increasing the area and flooding time. To assess the impact of the road system on the flood regime, the paper uses the Mike Flood modeling module to simulate the change of flood regime for flood events in 1999, 2007, 2020, and the 5% flood scenario. The comparison between the current road system and the old road system shows a certain increase in both depth and flooded area, especially in the case of 5% flood, the flood depth increases by 0.1 - 0.2 m in the upper part of the basin but only a small change in the lower part of the basin from 0.01 - 0.04 m.","PeriodicalId":17007,"journal":{"name":"Journal of Science Natural Science","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75147177","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