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Journal of the National Science Foundation of Sri Lanka最新文献

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Quantification of metabolite cinnamic acid of cinnamon (Cinnamomum zeylanicum) in human plasma 人血浆中肉桂代谢产物肉桂酸的定量测定
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10817
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引用次数: 0
Removal of methylene blue from aqueous solution using raw laterite: an adsorption study 用粗红土去除水溶液中亚甲基蓝的吸附研究
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10886
{"title":"Removal of methylene blue from aqueous solution using raw laterite: an adsorption study","authors":"","doi":"10.4038/jnsfsr.v51i1.10886","DOIUrl":"https://doi.org/10.4038/jnsfsr.v51i1.10886","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49584192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Insights into the ecological roles of assembling genomes for stimulated methanogenic archaea Methanoculleus in coal seams 煤层中受激产甲烷古菌基因组组装的生态学作用
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10779
B. Liu, Y. Li
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引用次数: 0
Additions of two Lamiaceae (Lamiales) species to Sri Lanka’s angiosperm check list from Northern dry zone. 斯里兰卡北部干旱区被子植物名录中增加了两个Lamiaceae（Lamiales）物种。
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10757
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引用次数: 0
Analyzing the effects of quarantine, isolation, and vaccination on the spread of COVID-19 via a mathematical model 通过数学模型分析隔离、隔离和疫苗接种对新冠肺炎传播的影响
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10698
L. Somathilake
The main COVID-19 control strategies presently practiced are maintaining social distancing, quarantin-ing suspected exposures, and isolating infectious people. In this paper, a deterministic compartmental mathematical model is proposed considering these three control strategies. Based on the proposed model the effect of vaccination on the suppression of the disease is discussed. Critical vaccination rate and vaccinated population size relevant to disease suppression are determined based on the proposed mathematical model. Different forms of the most used key term in infectious disease modelling, reproduction number, are determined relevant to the proposed model. Sensitivity analysis of the reproduction numbers is done to identify model parameters mostly affecting the spread of the disease. Based on the reproduction number of the model disease controlling parameter regions are determined and graphical representations of those parameter regions are presented. Based on the results of the proposed mathematical model, it is observed that earlier implementation of the vaccination process is helpful to better control the disease. However, it takes considerable time to invent successful vaccinations for newly out-breaking diseases like COVID-19. Therefore, it took considerable time to start the vaccination process for COVID-19. It is observed that after starting a vaccination process at a particular rate it should continue until the vaccinated population reaches a critical size. © 2023, National Science Foundation. All rights reserved.
目前实施的主要新冠肺炎控制策略是保持社交距离、隔离疑似接触者和隔离感染者。本文提出了一个考虑这三种控制策略的确定性分区数学模型。基于所提出的模型，讨论了疫苗接种对疾病抑制的影响。基于所提出的数学模型，确定了与疾病抑制相关的临界疫苗接种率和接种人群规模。传染病建模中最常用的关键术语繁殖数量的不同形式与所提出的模型相关。对繁殖数量进行敏感性分析，以确定主要影响疾病传播的模型参数。基于模型疾病控制参数区域的再现次数，确定了这些参数区域，并给出了这些参数的图形表示。根据所提出的数学模型的结果，可以观察到尽早实施疫苗接种过程有助于更好地控制疾病。然而，为新冠肺炎等新的门诊疾病研制成功的疫苗需要相当长的时间。因此，启动新冠肺炎疫苗接种程序需要相当长的时间。据观察，在以特定速度开始疫苗接种过程后，应继续进行，直到接种人群达到临界规模。©2023，美国国家科学基金会。保留所有权利。
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引用次数: 1
Effect of oviposition-site deprivation on reproductive performance and life history parameters of dengue vector Aedes aegypti 产卵场所剥夺对登革热媒介埃及伊蚊繁殖性能和生活史参数的影响
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10770
R. Gunathilaka, G. Ganehiarachchi
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引用次数: 0
Comparison of physicochemical and sensory properties of African butter seed (Pentadesma butyracea) and cocoa fats for potential use in future food applications 比较非洲黄油种子(Pentadesma butyracea)和可可脂肪在未来食品应用中的潜在用途的理化和感官特性
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10982
{"title":"Comparison of physicochemical and sensory properties of African butter seed (Pentadesma butyracea) and cocoa fats for potential use in future food applications","authors":"","doi":"10.4038/jnsfsr.v51i1.10982","DOIUrl":"https://doi.org/10.4038/jnsfsr.v51i1.10982","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46961953","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Estimation of soil liquefaction potential in Colombo Port City (Sri Lanka) using several design earthquakes 利用几次设计地震估算科伦坡港口城市(斯里兰卡)土壤液化潜力
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2023-04-10 DOI: 10.4038/jnsfsr.v51i1.10785
I.A.C.C. Ilangakoon, A. Athapaththu
{"title":"Estimation of soil liquefaction potential in Colombo Port City (Sri Lanka) using several design earthquakes","authors":"I.A.C.C. Ilangakoon, A. Athapaththu","doi":"10.4038/jnsfsr.v51i1.10785","DOIUrl":"https://doi.org/10.4038/jnsfsr.v51i1.10785","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2023-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49058993","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Poly-β-hydroxybutyrate (PHB) production potential of naturally existing cyanobacterial blooms 天然存在的蓝藻水华的聚β-羟基丁酸酯（PHB）生产潜力
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10660
R. Wijerathne, P. Manage, F. Idroos
{"title":"Poly-β-hydroxybutyrate (PHB) production potential of naturally existing cyanobacterial blooms","authors":"R. Wijerathne, P. Manage, F. Idroos","doi":"10.4038/jnsfsr.v50i4.10660","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10660","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48981723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Anomalous propagation pathway of the Sri Lanka Dome in summer 2014 2014年夏季斯里兰卡巨蛋的异常传播路径
IF 0.5 4区 综合性期刊 Q4 MULTIDISCIPLINARY SCIENCES
Journal of the National Science Foundation of Sri Lanka
Pub Date : 2022-12-31 DOI: 10.4038/jnsfsr.v50i4.10636
G. Pathirana, G. Chen, D. Wang, MK Abeyratne, T. Priyadarshana
{"title":"Anomalous propagation pathway of the Sri Lanka Dome in summer 2014","authors":"G. Pathirana, G. Chen, D. Wang, MK Abeyratne, T. Priyadarshana","doi":"10.4038/jnsfsr.v50i4.10636","DOIUrl":"https://doi.org/10.4038/jnsfsr.v50i4.10636","url":null,"abstract":"","PeriodicalId":17429,"journal":{"name":"Journal of the National Science Foundation of Sri Lanka","volume":" ","pages":""},"PeriodicalIF":0.5,"publicationDate":"2022-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44930475","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"综合性期刊","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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