Bibechana最新文献_第2页

Assessment of the antibacterial activity of lemongrass-extracted essential oil 柠檬草提取精油的抗菌活性评估

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.58311

Prem Raj Joshi, Prakash Raj Pant, A. Bist, Gunananda Pant, Bishweshwar Pant, P. Saud

{"title":"Assessment of the antibacterial activity of lemongrass-extracted essential oil","authors":"Prem Raj Joshi, Prakash Raj Pant, A. Bist, Gunananda Pant, Bishweshwar Pant, P. Saud","doi":"10.3126/bibechana.v20i3.58311","DOIUrl":"https://doi.org/10.3126/bibechana.v20i3.58311","url":null,"abstract":"Lemongrass is one of the medicinal plants having significant applications to cure various diseases. This study aims at extracting essential oils from lemongrass plants and examining their antibacterial activity. The sample of lemongrass for this study was collected from Kailali District, Nepal. The leaves of lemongrass were collected, washed, cut into small pieces, and dried in the sun. Then pieces of lemongrass were steam distilled for about 4 hours using the Clevenger apparatus, and oil was extracted. The extracted essential oil was further utilized to study its antibacterial activity in human pathogens, namely Staphylococcus aureus (S. aureus: gram-positive bacteria), by Agar diffusion and broth dilution methods. It was found that the zone of inhibition for S. aureus in concentrations of 100%, 75%, 50%, and 25% was about 25 mm, 11 mm, 9 mm, and 0 mm, respectively. In addition, it is clear from this study that the gram-positive bacteria were sensitive to essential oils. The lowest and highest zones of inhibition were shown against S. aureus at 25% and 100% concentrations, respectively. The zone of inhibition at 100% concentration is 25 mm and at 25% concentration is 0 mm, so lemongrass oil is effective against drug-resistant organisms only at high concentrations.","PeriodicalId":8759,"journal":{"name":"Bibechana","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139199829","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

Measurement of background radiation in Jhapa, Ilam, Panchthar, and Taplejung districts of Nepal 尼泊尔贾帕、伊拉姆、潘奇塔尔和塔布勒琼县的本底辐射测量结果

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.57882

Arun Kumar Shrestha, Roshan Nepal, Kamala Shrestha, Dijan Regmi, Ganesh Kumar Shrestha, Buddha Ram Shah, Ram Prasad Koirala

引用次数: 0

Time and Space Domain Prediction of Water Quality Parameters of Bagmati River Using Deep Learning Methods 利用深度学习方法对巴格马蒂河水质参数进行时域和空域预测

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.57736

Pujan Bashyal, Mandira Adhikari, Nanda Bikram Adhikari

{"title":"Time and Space Domain Prediction of Water Quality Parameters of Bagmati River Using Deep Learning Methods","authors":"Pujan Bashyal, Mandira Adhikari, Nanda Bikram Adhikari","doi":"10.3126/bibechana.v20i3.57736","DOIUrl":"https://doi.org/10.3126/bibechana.v20i3.57736","url":null,"abstract":"Bagmati river is biologically, geologically, religiously and historically significant among the river systems of the Kathmandu Valley. The river is affected by five major tributaries, including Manohara, Dhobi Khola, Tukucha, Bishnumati, and Balkhu Khola, which significantly impact the water chemistry inside the Kathmandu Valley. The data of water quality parameters pH, dissolved oxygen, turbidity, temperature, oxygen reduction potential, conductivity, total dissolved solids, salinity among others was collected using fixed sensors (in period of 5 seconds) and mobile sensors (with latitude and longitude) along the river. The observation is important for two reasons, one because it was collected in real-time and fine scale, which is not normally possible with traditional ways, and next such observation was done for the first time in Bagmati River. The aim of this study was to predict water quality parameters of the Bagmati River using machine learning time series models, specifically ARIMA and LSTM. The LSTM model was designed with one input layer, one encoder layer, one repeat layer, one decoder layer, and one output dense layer to separate the output into temporal slices. Additionally, a DNN model was employed for location-based prediction, utilizing two input layers for latitude and longitude and seven output layers for the seven water quality parameters considered for study. The models demonstrated promising performance, but further data collection and parameter variation are recommended for continued optimization.","PeriodicalId":8759,"journal":{"name":"Bibechana","volume":"652 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139203198","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

Cr3+ substitution effect on Co-Cu and Cu-Co nano ferrites on structural and morphological properties Cr3+ 取代对 Co-Cu 和 Cu-Co 纳米铁氧体结构和形态特性的影响

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.58411

D. Parajuli, N. Murali, K. Samatha

引用次数: 0

Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world 全球五个 AERONET 站的气溶胶光学深度与可降水量的相关研究

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.57153

Santosh Sapkota, Sabina Gautam, Aayush Gautam, Bhairab Ale

{"title":"Correlative study of Aerosol Optical Depth with Precipitable water over five AERONET station across the world","authors":"Santosh Sapkota, Sabina Gautam, Aayush Gautam, Bhairab Ale","doi":"10.3126/bibechana.v20i3.57153","DOIUrl":"https://doi.org/10.3126/bibechana.v20i3.57153","url":null,"abstract":"Ground-based measurements were taken at various locations, including Kathmandu Bode, Beijing, Gandhi College (located in South Asian zone, highly polluted area), Canberra, and UNC Gaitan (located in South Eastern zone, low polluted area), from January to December 2016. The study investigated the seasonal and inter-annual AOD that were obtained using CIMEL Sunphotometer, as a part of the Aerosol Robotic Network (AERONET). The data showed that Kathmandu (0.45±0.01), Gandhi College (0.45±0.02 and Beijing (0.85±0.03) had higher AOD values compared to other stations, with Kathmandu being a high-altitude site. The analysis found that pre-monsoon AOD were higher over Kathmandu (0.45±0.01), Gandhi College (0.45±0.02), UNC Gaitan (0.28±0.001), and Canberra (0.06±0.002). On the other hand, the monsoon AOD was higher over Beijing (0.85±0.03). The study identified various factors contributing to the higher AOD values in specific regions. Beijing, Gandhi College, and Kathmandu, located in Asian monsoon regions, experienced high aerosol loading due to economic activities, vehicles, urbanization, vegetation fire, land clearing for crop cultivation, as well as winter biomass burning, heating needs, and pollution from bricks kilns, factories, and vehicles. Canberra and UNC Gaitan had higher AOD values primarily due to biomass burning and dust. AOD values are higher for shorter wavelength and vice-versa. We conducted a correlation analysis between AOD and perceptible water at different wavelengths and observed one to one correspondence. The columnar water vapor (CWV) exhibited a high correlation with AOD in Canberra (Coefficient of determination, R2 = 0.61) at 1640 nm but had no relationship with AOD in Gandhi College (Coefficient of determination, R2 = 0) at 1640nm. There is weak negative correlation between AOD and preceptable water over Kathmandu and UNC Gaitan, but have positive correlation in Canberra, Beijing and Gandhi College","PeriodicalId":8759,"journal":{"name":"Bibechana","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139201560","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

Exploring topological phase transition in Pt2Hg1−xTlxSe3 探索 Pt2Hg1-xTlxSe3 中的拓扑相变

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.58632

Deergh Bahadur Shahi, Dipak Bhattarai, Madhav Prasad Ghimire

引用次数: 0

Thermodynamic, structural and surface properties of rare earth metallic alloys: Au-La liquid system 稀土金属合金的热力学、结构和表面特性：Au-La 液体体系

Bibechana Pub Date : 2023-11-30 DOI: 10.3126/bibechana.v20i3.59896

S. K. Yadav

{"title":"Thermodynamic, structural and surface properties of rare earth metallic alloys: Au-La liquid system","authors":"S. K. Yadav","doi":"10.3126/bibechana.v20i3.59896","DOIUrl":"https://doi.org/10.3126/bibechana.v20i3.59896","url":null,"abstract":"A complete information related to the mixing behaviours of Au alloyed with rare earth metals or lanthanides is very scarce. Therefore, an attempt has been made in this work to compute and study the temperature and concentration dependent thermodynamic, structural and surface properties of Au-La liquid alloy using different theoretical approaches. The thermodynamic properties, such as excess Gibbs free energy of mixing, enthalpy of mixing, excess entropy of mixing and activity of the system were computed using available coefficients of interaction energy parameters in the framework of Redlich-Kister polynomial. Taking these as reference values, model parameters for quasi-lattice model were optimised at 1473 K. The model parameters were then determined at higher temperatures assuming them to be linear temperature-dependent. The thermodynamic and structural properties were then computed in the temperature range 1473 K-1773 K. The surface properties of the system were computed using Bulter’s model using determined values of partial excess Gibbs free energy of its components. Present investigations revealed that the compound forming tendency of the system gradually decreased with increase in temperature of the system.","PeriodicalId":8759,"journal":{"name":"Bibechana","volume":"319 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139208019","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