Nepal Journal of Science and Technology最新文献_第5页

Comparison of Relative Flux Density of Procyon in Visible Band 可见光波段中质子相对通量密度的比较

Nepal Journal of Science and Technology Pub Date : 2021-12-31 DOI: 10.3126/njst.v20i1.43357

Bimal Subedi, Sameer Nepal, Ocean Shrestha

引用次数: 0

Fuel Briquettes from Sal (Shorea robusta) Forest Litter as an Alternative Cooking Fuel 从森林凋落物中提取燃料压块作为替代烹饪燃料

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39433

Sushmita Dulal, R. Singh

引用次数: 0

Rooftop Hydroponics: Opportunity for Urban Agriculture in Godawari Municipality of Nepal 屋顶水培法:尼泊尔戈达瓦里市城市农业的机遇

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39431

S. Shrestha, Bijan Shrestha, M. V. Shrestha

引用次数: 1

Phytochemical Screening and Evaluation of Antimicrobial and Antioxidant Activity of Mahonia napaulensis (Jamanemandro) Bark Extract 山核桃树皮提取物的植物化学筛选及抗氧化活性评价

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39429

Ranjan Paudel, R. Sharma, Shreeya Bhandari, Manan Koirala, G. Bhandari, N. L. Bhandari

{"title":"Phytochemical Screening and Evaluation of Antimicrobial and Antioxidant Activity of Mahonia napaulensis (Jamanemandro) Bark Extract","authors":"Ranjan Paudel, R. Sharma, Shreeya Bhandari, Manan Koirala, G. Bhandari, N. L. Bhandari","doi":"10.3126/njst.v20i1.39429","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39429","url":null,"abstract":"Mahonia napaulensis also known as “Jamanemandro” in Nepali is a medium-sized stiff evergreen shrub widely distributed in South East Asia at an altitude of 1000-2000m, is traditionally used to treat dysentery and eye inflammation. This research focuses on screening of the phytochemicals, antimicrobial, and antioxidant properties of this plant. The methanolic extract was prepared using a Soxhlet apparatus. The antioxidant properties of extract were carried out by 50% inhibitory concentration (IC50) values from 2-2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging. The phytochemical screening confirmed the presence of terpenoids, reducing sugars, tannins, alkaloids, glycosides including cardiac glycosides and steroids. The antimicrobial activity was studied using the disc diffusion method in five different human pathogens named Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Salmonella typhi, and Shigella spps. The methanol extract was compared with standard chloramphenicol and showed that methanolic extract of is M.napaulensis exhibit maximum effect against S. aureus with higher growth inhibition zones (27.3 mm), followed by P. aeruginosa, Shigella spps., E. coli and S. typhi. These antimicrobial properties showed similar effect to that of positive control, chloramphenicol. The IC50 values from DPPH radical scavenging were 230.89 µg/mL and 182.73 µg/mL of methanol extract and ascorbic acid, respectively. Due to this antimicrobial and antioxidant properties of M. napaulensis it was widely applicable in biomedical field.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131186218","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

Genetic Diversity of Nepalese Indigenous Cattle Breeds Based on D-Loop Mitochondrial DNA 基于D-Loop线粒体DNA的尼泊尔本土牛品种遗传多样性

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39440

N. Gorkhali, C. Sherpa, A. Dhakal, S. Dhungana, S. Sapkota, Prashanna Koirala, Bhoj Raj Pokhrel, M. Kolachhapati, N. Bhattarai

{"title":"Genetic Diversity of Nepalese Indigenous Cattle Breeds Based on D-Loop Mitochondrial DNA","authors":"N. Gorkhali, C. Sherpa, A. Dhakal, S. Dhungana, S. Sapkota, Prashanna Koirala, Bhoj Raj Pokhrel, M. Kolachhapati, N. Bhattarai","doi":"10.3126/njst.v20i1.39440","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39440","url":null,"abstract":"Nepalese cattle are known for their genetic potentiality concerning inhabitant in extreme climatic conditions, surviving in the scarce food supply, and resistant to several diseases. We aimed to assess Nepal’s ancestral origin and genetic diversity of indigenous cattle breeds based on hyper-variable D loop mtDNA sequences. Three cattle breeds (Siri, Achammi, & Lulu) comprising the total sample population (n= 75) were employed in the study where the mt DNA information of two breeds (Achammi & Lulu) were retrieved from the published source. Hyper-variable D loop (910bp) of Siri cattle was PCR amplified and sequenced. This study claims that the possible ancestral origin of Bos taurus and Bos indicus mtDNA lineage in the Nepalese cattle population is majorly influenced by China and India, respectively. This study suggests that Nepalese cattle can be divided into two major groups: Bos taurus and Bos indicus, where most of the cattle population was of Bos indicus origin. The sampled population can be classified into three significant haplogroups: T3 (25%), I1 (48%), and I2 (27%) revealing a higher genetic diversity among the Nepalese cattle population. Only T3 taurine haplogroup was found in the sampled population. It was consistent with the fact that the absence of T1 haplogroup in North-East Asian cattle. In terms of Bos indicus, the I1 haplogroup was dominant over I2. Higher genetic diversity can be appropriate reasoning for Nepalese cattle’s survival in a harsh environment and low food conditions.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133651496","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

Comparative Study of Cleansing Action of Some Detergents Available in Nepalese Market 尼泊尔市场上几种洗涤剂清洁作用的比较研究

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39435

A. Pathak, Pratima Khadka, P. Karki

引用次数: 0

Biology of Zygogramma Bicolorata Pallister on Parthenium hysterophorus Linn. under Laboratory Conditions 双色刺槐在子宫草上的生物学研究。实验室条件下

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39375

Ajaya Shree Ratna Bajracharya, Resham Bahadur Thapa, Gopal Bahadur K.C., Shree Baba Pradhan, Jagat Devi Ranjit

{"title":"Biology of Zygogramma Bicolorata Pallister on Parthenium hysterophorus Linn. under Laboratory Conditions","authors":"Ajaya Shree Ratna Bajracharya, Resham Bahadur Thapa, Gopal Bahadur K.C., Shree Baba Pradhan, Jagat Devi Ranjit","doi":"10.3126/njst.v20i1.39375","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39375","url":null,"abstract":"Parthenium hysterophorus Linn. is one of the most aggressive, invasive weeds threatening natural and agricultural ecosystems in the world including Nepal. Augmentative release of host-specific, leaf feeding beetle, Zygogramma bicolorata Pallister (Coleoptera: Chrysomelidae) is one of the sustainable management approaches of parthenium weed. Successful mass rearing program requires knowledge on biology of Z. bicolorata for augmentative release. Thus, life cycle and biology of Z. bicolorata were studied in lab at 26±2 °C temperature and 70±10% relative humidity at NARC, Lalitpur, Nepal during March to September, 2016. The average incubation, larval and pupal periods of the insect were 4.33, 12.20, and 11.00 days, respectively. A single female could lay 1,837 eggs in 58.80 days oviposition period with 73.01% egg hatchability. The insect completed its life cycle in 108.40 and 105.50 days with adult longevity of 91.90 and 75.00 days for females and males, respectively. The average length of egg, pupa, adult female and male was 1.19 mm, 5.90 mm, 6.58 mm and 5.32 mm and breadth 0.51 mm, 3.74 mm, 3.94 mm and 3.20 mm, respectively. The average lengths of the first, second, third and fourth instar larvae were found 1.30 mm, 3.02 mm, 4.96 mm and 8.08 mm and breadth of 0.44 mm, 1.13 mm, 2.02 mm and 3.16 mm, respectively. These findings will help in mass multiplication of Z. bicolorata for biological control of parthenium weed.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"193 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127560922","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

Bacterial Assessment of Buffalo Meat in Kathmandu Valley 加德满都谷地水牛肉细菌鉴定

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39438

B. Koirala, Radha Bhattarai, R. Maharjan, Sanjeet Maharjan, S. Shrestha

{"title":"Bacterial Assessment of Buffalo Meat in Kathmandu Valley","authors":"B. Koirala, Radha Bhattarai, R. Maharjan, Sanjeet Maharjan, S. Shrestha","doi":"10.3126/njst.v20i1.39438","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39438","url":null,"abstract":"Meat is highly nutritious and mostly consumed food. Usually, meat gets contaminated because of improper handling, open transportation practice, unhygienic cutting tools, and can cause various food–borne illnesses. This study was focused to determine bacterial load and occurrences of potential pathogenic bacteria in the raw buffalo meat sold in Kathmandu valley. Altogether 40 raw buffalo meat samples were collected and assessed. In addition, antibiotic susceptibility of gram-negative bacterial isolates was tested. The total plate count (TPC), and coliform count (CC) in the samples were found comparatively highest from the Asan area of Kathmandu with 9.6±0.02 log CFU/gm and 8.9±0.00 log CFU/gm respectively. Altogether 10 genera of gram-negative bacteria were identified based on the various biochemical tests. The isolated gram-negative bacteria included Proteus spp (39%, 21/54), Pseudomonas (19%, 10/54) Citrobacter spp. (9%, 5/54), E. coli (7%, 4/54), Serratia marcescens (5%, 3/54), Salmonella spp. (9%, 5/54), Enterobacter spp. (2%,1/54), Morganella morganeii (2%,1/54), Klebsiella (2%, 1/54), Yersinia enterocolitica (6%,3/54). The antibiotic susceptibility tests for the isolates was carried against six different antibiotics including-Ofloxacin (OF), Ciprofloxacin (CIP), Nalidixic Acid (NA), Nitrofurantoin (NIT 300), Amoxycillin (AMX) and Chloramphenicol (C). Out of total 54 isolates, 36 were found to be multidrug- resistant. The results of this study clearly revealed buffalo meat sold in Kathmandu valley was contaminated with potential bacterial pathogens which may cause various food- borne illnesses. The occurrence of multi - drug resistant bacteria in the meat samples is alarming threat to public health. Adequate measures to protect bacterial contamination in buffalo meat is highly recommended.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"129 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134095010","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

Investigation on Lateral Loading on Masonry Walls 砌体墙体侧向荷载的研究

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39385

Hari Ram Parajuli, Arjun Ghimire

{"title":"Investigation on Lateral Loading on Masonry Walls","authors":"Hari Ram Parajuli, Arjun Ghimire","doi":"10.3126/njst.v20i1.39385","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39385","url":null,"abstract":"5)\u0000Though a traditional material used for construction for ages, masonry is a complex composite material, and its mechanical behavior is influenced by a large number of factors, is not generally well understood. This research aims to study the methodology available in the literature to evaluate the increase in performance of masonry by applying different reinforcement options under in-plane lateral loading. Nonlinear static analysis has been carried out as part of this research to achieve the above objectives. Different unreinforced masonry wall panels were analyzed at various load conditions. Material properties for the masonry wall were taken from the experimental test results of previous literature. The walls were first checked for two failure mechanisms. The stress distributions of walls were checked in each step of analysis and shear failure, and rocking failure was found. Each wall was then analyzed for six different reinforcement options. The comparison of results obtained from the reinforced wall analysis with that of the unreinforced wall indicated significant increase in lateral load-bearing capacity and decreased wall displacement with reinforcement. The maximum increase in load-bearing capacity was achieved by adding chicken wire mesh or CFRP bands throughout the wall while the maximum decrease in displacement was achieved by adding 12 mm diameter bars at the spacing of one meter.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121141961","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

Evaluation of Weight Decay Regularization Techniques for Stock Price Prediction using Gated Recurrent Unit Network 基于门控循环单元网络的股票价格预测的权值衰减正则化技术评价

Nepal Journal of Science and Technology Pub Date : 2021-10-10 DOI: 10.3126/njst.v20i1.39379

Arjun Singh Saud, S. Shakya

{"title":"Evaluation of Weight Decay Regularization Techniques for Stock Price Prediction using Gated Recurrent Unit Network","authors":"Arjun Singh Saud, S. Shakya","doi":"10.3126/njst.v20i1.39379","DOIUrl":"https://doi.org/10.3126/njst.v20i1.39379","url":null,"abstract":"Stock price forecasting in the field of interest for many stock investors to earn more profit from stock trading. Nowadays, machine learning researchers are also involved in this research field so that fast, accurate and automatic stock price forecasting can be achieved. This research paper evaluated GRU network’s performance with weight decay reg-ularization techniques for predicting price of stocks listed NEPSE. Three weight decay regularization technique analyzed in this research work were (1) L1 regularization (2) L2 regularization and (3) L1_L2 regularization. In this research work, six randomly selected stocks from NEPSE were experimented. From the experimental results, we observed that L2 regularization could outperform L1 and L1_L2 reg-ularization techniques for all six stocks. The average MSE obtained with L2 regularization was 4.12% to 33.52% lower than the average MSE obtained with L1 regularization, and it was 10.92% to 37.1% lower than the average MSE obtained with L1_L2 regularization. Thus, we concluded that the L2 regularization is best choice among weight regularization for stock price prediction.","PeriodicalId":129302,"journal":{"name":"Nepal Journal of Science and Technology","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124122928","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