Journal of Hunan Institute of Science and Technology最新文献_第8页

Synthesis and Characterization of Urea–Formaldehyde Eco-Friendly Composite Based On Natural Fibers 基于天然纤维的脲醛环保复合材料的合成与表征

Journal of Hunan Institute of Science and Technology Pub Date : 2019-06-26 DOI: 10.3126/JIST.V24I1.24623

N. L. Bhandari, B. R. Dhungana, R. Lach, S. Henning, R. Adhikari

引用次数: 9

Determination and Contamination Assessment of Heavy Metals in Street Dust from Different Types of Land-Use in Kathmandu District, Nepal 尼泊尔加德满都地区不同土地利用类型街道粉尘中重金属的测定与污染评价

Journal of Hunan Institute of Science and Technology Pub Date : 2019-06-26 DOI: 10.3126/JIST.V24I1.24622

Sudarshana Shakya, Samikshya Baral, P. Belbase, M. Siddique, A. Samoh, Banani Das, Prem Kumar Shrestha, P. Shakya

{"title":"Determination and Contamination Assessment of Heavy Metals in Street Dust from Different Types of Land-Use in Kathmandu District, Nepal","authors":"Sudarshana Shakya, Samikshya Baral, P. Belbase, M. Siddique, A. Samoh, Banani Das, Prem Kumar Shrestha, P. Shakya","doi":"10.3126/JIST.V24I1.24622","DOIUrl":"https://doi.org/10.3126/JIST.V24I1.24622","url":null,"abstract":"A total of forty seven street dust samples, collected from five different types of land use viz., industrial, urban, heavy traffic road, residential and undisturbed areas (control) of Kathmandu district (Nepal), were subjected to characterize the physico-chemical parameters such as pH, electrical conductance (EC), total alkalinity (T. Alk), total organic carbon (TOC) and particle size distribution. Four heavy metals of Cd, Cu, Pb and Zn were determined in dust samples using flame atomic absorption spectrophotometer (FAAS). It was found that all types of dust samples possessed alkaline nature along with variation in EC, T. Alk and TOC values. Results revealed that the dust of industrial areas contained high concentrations of Zn (143.3 mg/kg) and Cu (106.42 mg/kg), whereas the heavy traffic areas were mainly affected by Cd (0.90 mg/kg) and Pb (70.08 mg/kg). The average metal concentrations of Cd, Cu, Pb and Zn in dust of all the types of land use in Kathmandu were found to be 0.73, 68.86, 51.46 and 104.30 mg/kg and their average metal enrichment factors were 2.28, 5.50, 1.92 and 3.17, respectively. The results were also compared against heavy metals status in street dust from various cities/countries around the world. Pollution indices such as contamination factor (CF), degree of contamination (CD) and geo-accumulation index (Igeo) showed different classes of metal contamination in street dust of Kathmandu indicating traffic emission, automobiles, construction and demolition activities and other anthropogenic activities as the potential sources.","PeriodicalId":16072,"journal":{"name":"Journal of Hunan Institute of Science and Technology","volume":"90 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90601098","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: 5

BEAT FREQUENCY AND VELOCITY VARIATION OF IONS IN A MAGNETIZED PLASMA SHEATH FOR DIFFERENT OBLIQUENESS OF THE MAGNETIC FIELD 磁化等离子体鞘层中离子在不同磁场倾角下的拍频和速度变化

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22201

B. Adhikari, S. Basnet, H. P. Lamichhane, R. Khanal

引用次数: 3

STUDY ON THE CHEMICAL CONSTITUENTS AND ANTIBACTERIAL ACTIVITY OF ESSENTIAL OIL OF ACORUS CALAMUS L. RHIZOMES OF RUPENDEHI DISTRICT (NEPAL) 尼泊尔rupendehi地区菖蒲根茎挥发油化学成分及抑菌活性研究

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22196

S. Joshi, Sundar Bashyal

{"title":"STUDY ON THE CHEMICAL CONSTITUENTS AND ANTIBACTERIAL ACTIVITY OF ESSENTIAL OIL OF ACORUS CALAMUS L. RHIZOMES OF RUPENDEHI DISTRICT (NEPAL)","authors":"S. Joshi, Sundar Bashyal","doi":"10.3126/JIST.V23I1.22196","DOIUrl":"https://doi.org/10.3126/JIST.V23I1.22196","url":null,"abstract":"The essential oil from the air dried powder of wild Acorus calamus L. rhizomes was isolated using Clevenger-type hydrodistillation apparatus and its chemical constituents were analyzed by gas chromatography-mass spectrometric (GC-MS) analysis. A total numbers of fourteen chemical constituents were identified and quantified occupying 100 % of total oil composition. The major chemical constituents are reported to be β-asarone (68.96 %), 4-hydroxy-4-methyl-2-pentanone (8.73 %) shyobunone (8.65 %), p-methoxyphenyl butanone (4.16 %) and the minor chemical constituents are δ-cadinene (0.84 %), isoelemicine (2.68 %), muurolene (1.92 %) and cis-ocimene (1.44 %). The antibacterial activity of the essential oil isolated from the wild Acorus calamus L. rhizomes was carried out using paper disc method against one Gram positive bacteria of Staphylococcus aureus and three Gram negative bacteria of Escherichia coli, Klebsiella pneumoniae and Proteus vulgaris. The isolated essential oil from the dry powder of Acorus calamus L. rhizome showed a good potentiality of the antibacterial effect against tested bacteria.","PeriodicalId":16072,"journal":{"name":"Journal of Hunan Institute of Science and Technology","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77796962","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

A GLOBAL PERSPECTIVE OF VEHICULAR EMISSION CONTROL POLICY AND PRACTICES: AN INTERFACE WITH KATHMANDU VALLEY CASE, NEPAL 车辆排放控制政策和实践的全球视角:与加德满都山谷案例的接口，尼泊尔

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22199

Bhupendra Das, P. Bhave, S. Puppala, R. Byanju

引用次数: 9

WILDFIRE DYNAMICS AND ITS EFFECTS ON THE FOREST RESOURCES AND PUBLIC PROPERTY IN NEPAL 尼泊尔野火动态及其对森林资源和公共财产的影响

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22197

K. Bhujel, R. Byanju, A. P. Gautam

{"title":"WILDFIRE DYNAMICS AND ITS EFFECTS ON THE FOREST RESOURCES AND PUBLIC PROPERTY IN NEPAL","authors":"K. Bhujel, R. Byanju, A. P. Gautam","doi":"10.3126/JIST.V23I1.22197","DOIUrl":"https://doi.org/10.3126/JIST.V23I1.22197","url":null,"abstract":" NASA (National Aeronautics and Space Administration) has detected several intensive wildfires from the local to global level in 2016. However, deeper study on the dynamics of wildfire and its consequences are still inadequate. This study was carried out to find wildfire dynamics and its effects on the forest resources and public property in Nepal. Moderate Resolution Imaging Spector-Radiometer (MODIS) was used for active fire data of 2016 in Nepal. Wildfire-related national and international published articles, report, website and media were reviewed. Data were analyzed using ArcGIS and MS Excel. The result showed an abnormal wildfire incidence areas in 2016, adverse effect on the forest resources and public property. One hundred forty burnt days were recorded. Density of wildfire incidence and burnt area were found to be 0.09 number and 3.4 hectares per km2, respectively, which was around 33 % more than of the last 15 years. The huge forest resources and its tangible as well as intangible services were lost during the year of 2016. Loss of forest resources account for about NRs 11,750,000 (US$ 107,798) as per local market price for the year. Total eleven people were killed and over hundred people injured. The findings of the present study will be useful baseline information for implementers, researchers and decision-makers in future.","PeriodicalId":16072,"journal":{"name":"Journal of Hunan Institute of Science and Technology","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80688433","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: 6

STATUS, DISTRIBUTION AND HABITAT SPECIFICITY OF BENTHIC MACRO-INVERTEBRATES: A CASE STUDY IN FIVE TRIBUTARIES OF BUDDHIGANGA RIVER IN WESTERN NEPAL 大型底栖无脊椎动物的现状、分布和生境特征——以尼泊尔西部布迪甘加河5条支流为例

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22198

B. Bhandari, R. Shah, Subodh Sharma

{"title":"STATUS, DISTRIBUTION AND HABITAT SPECIFICITY OF BENTHIC MACRO-INVERTEBRATES: A CASE STUDY IN FIVE TRIBUTARIES OF BUDDHIGANGA RIVER IN WESTERN NEPAL","authors":"B. Bhandari, R. Shah, Subodh Sharma","doi":"10.3126/JIST.V23I1.22198","DOIUrl":"https://doi.org/10.3126/JIST.V23I1.22198","url":null,"abstract":" Benthic macro-invertebrates are organisms that inhabit the bottom of substrates such as sediments, debris, logs, macrophytes and filamentous algae of streams, rivers and lakes for some span of their lifecycle. They are important part of food chain since they are source of food for different species of fishes and process organic matters. These organisms are considered vital tools to assess any environmental change caused by anthropogenic interference in the river ecosystems. In this study, we sampled macro-invertebrates from 5 different rivers across altitudinal ranges of 600- 800 m and 1500-1700 m above sea level. We observed that the macro-invertebrate diversity varied substantially across altitudinal ranges. The diversity of macro-invertebrates was higher in lower altitudinal range, where 11 families were found, more than the higher altitudinal range. Some rare and dominant families were also identified in our study. We also examined the substrate specificity of macro-invertebrates. Results revealed that Ephemeroptera,Tricoptera, Coleoptera, Diptera and Odonata were found in all seven substrates namely bedrock, boulder, cobble, stone, pebble, gravel and sand. The richness and abundance of macro-invertebrates were documented in cobble, stone and pebble substrates. Similarly we also investigated the ecological river quality class of rivers using Ganga River System Biotic Score-Average Score per Taxon (GRS-BioS/ASPT) system which indicated good status. The outcomes of this study serve as a baseline data since no prior research has been done in these rivers.","PeriodicalId":16072,"journal":{"name":"Journal of Hunan Institute of Science and Technology","volume":"26 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75317365","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

ADSORPTIVE REMOVAL OF PHOSPHATE ONTO IRON LOADED LITCHI CHINENSIS SEED WASTE 载铁荔枝籽渣吸附除磷的研究

Journal of Hunan Institute of Science and Technology Pub Date : 2019-01-01 DOI: 10.3126/JIST.V23I1.22200

Asmita Shrestha, B. R. Poudel, Manoj Silwal, M. R. Pokhrel

引用次数: 11

ADSORPTIVE REMOVAL OF TRACE CONCENTRATION OF FLUORIDE FROM WATER USING CERIUM LOADED DRIED ORANGE JUICE RESIDUE 用载铈干橙汁渣吸附去除水中痕量氟化物

Journal of Hunan Institute of Science and Technology Pub Date : 2018-12-30 DOI: 10.3126/JIST.V23I1.22160

H. Paudyal, K. Inoue

引用次数: 4

MULTI-DRUG RESISTANT UROPATHOGENS ISOLATED FROM MID STREAM URINE SAMPLES 从中游尿样中分离出多重耐药尿路病原体

Journal of Hunan Institute of Science and Technology Pub Date : 2018-12-30 DOI: 10.3126/JIST.V23I1.22159

N. Regmi, Sonali Kafle, R. Paudyal

引用次数: 3