Ceylon Journal of Science最新文献_第9页

A review on HgTe colloidal quantum dot infrared photodetectors HgTe胶体量子点红外光电探测器研究进展

Ceylon Journal of Science Pub Date : 2023-06-01 DOI: 10.4038/cjs.v52i2.8154

I. M. E. Sachinthanie, M. M. I. H. K. Madigasekara, H. Perera

引用次数: 0

Detection of preimaginal forms of dengue vectors from environmental samples in Jaffna city, northern Sri Lanka: an eDNA-based approach 斯里兰卡北部贾夫纳市环境样本中登革热病媒的预想象检测:基于dna的方法

Ceylon Journal of Science Pub Date : 2023-06-01 DOI: 10.4038/cjs.v52i2.8041

Arthiyan Sivasingham, A. Tharsan, T. Eswaramohan, S. Raveendran, S. Surendran

{"title":"Detection of preimaginal forms of dengue vectors from environmental samples in Jaffna city, northern Sri Lanka: an eDNA-based approach","authors":"Arthiyan Sivasingham, A. Tharsan, T. Eswaramohan, S. Raveendran, S. Surendran","doi":"10.4038/cjs.v52i2.8041","DOIUrl":"https://doi.org/10.4038/cjs.v52i2.8041","url":null,"abstract":": Vector surveillance is crucial for implementation of appropriate vector control strategies to reduce the transmission of vector-borne diseases such as dengue, a major public health concern in Sri Lanka. Aedes aegypti and Ae. albopictus are the primary and secondary vectors of dengue virus, respectively. Dengue is endemic in the Jaffna District and the presence of dengue vectors from many water bodies, including brackish water habitats, is reported. The use of environmental DNA (eDNA) has emerged as a novel tool to detect and identify vector species present in any aquatic environment. This study, used environmental DNA to determine the presence of major dengue vectors in different aquatic habitats in the Municipal limits of the Jaffna District. Potential pre-imaginal developmental sites of dengue vectors were identified in randomly selected 10 blocks consisting of at least 40 houses within the study location. One hundred and twenty water samples without any visible preimaginal forms were collected from these sites to extract eDNA. PCR assays were performed using species-specific primers designed for Ae. aegypti and Ae. albopictus . The presence of Ae. aegypti and Ae. albopictus was identified in 12 (10.0%) and 30 samples (25.0%), respectively. The presence of both species was detected in nine samples (7.5%). The salinity of the water from which Aedes DNA was detected ranged from 0–7 gL -1 . The results revealed that eDNA is an indirect but valid surveillance tool for monitoring preimaginal developmental forms of mosquitos in the aquatic environment.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41775289","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

Freshness evaluation of Sharptooth catfish (Clarias gariepinus burchell 1842) stored in ice fish box™ using quality index method 用质量指数法评价冰鱼箱™中储存的尖牙鲶鱼(Clarias gariepinus burchell 1842)的新鲜度

Ceylon Journal of Science Pub Date : 2023-06-01 DOI: 10.4038/cjs.v52i2.8161

S. Atanda, O. Dada, A. Y. Adediji, O. B. Adebayo, I. M. Ige, A. S. Ibrahim, O. Oyebanji, P. Pessu

{"title":"Freshness evaluation of Sharptooth catfish (Clarias gariepinus burchell 1842) stored in ice fish box™ using quality index method","authors":"S. Atanda, O. Dada, A. Y. Adediji, O. B. Adebayo, I. M. Ige, A. S. Ibrahim, O. Oyebanji, P. Pessu","doi":"10.4038/cjs.v52i2.8161","DOIUrl":"https://doi.org/10.4038/cjs.v52i2.8161","url":null,"abstract":": Fish tend to spoil quickly after harvesting during handling, transportation and storage, thus needs intervention. Nigerian Stored Products Research Institute developed an insulated box for handling, transportation and storage of fresh fish. However, evaluation of fish quality including freshness is mostly done with the analysis of chemical and microbial parameters that are time consuming and costly. In Nigeria, no specific method exists for evaluating the freshness of fish when landed and its shelf life on ice. Sharptooth catfish ( Clarias gariepinus) stored in two models of Ice Fish Box™ were assessed for freshness during storage using Quality Index Method (QIM) based on a structured scale for quality measurements to provide accurate and precise information in terms of freshness and to predict remaining shelf-life of catfish. The Quality Index scores had a correlation of 0.9839 and 0.9301 with new and old ice boxes, respectively and there was linearity between period of storage and quantity of ice with total scores of attributes such as colour, skin, gill, firmness and odour decreasing with storage time. Catfish had a shelf life of 48 hours in Ice Fish Box without further addition of ice. Based on this outcome, QIM can be used as an on- the spot evaluation tool to evaluate freshness of fish and a useful guide for fishermen and setting standards for other stakeholders in the value chain which may enhance better post-harvest management of fish.","PeriodicalId":9894,"journal":{"name":"Ceylon Journal of Science","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46060583","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

Investigation of magnetic properties of ferromagnetic thin films with three spin layers using fourth order perturbed Heisenberg Hamiltonian 用四阶微扰海森堡-哈密顿量研究三自旋层铁磁薄膜的磁性

Ceylon Journal of Science Pub Date : 2023-06-01 DOI: 10.4038/cjs.v52i2.8155

M. Farhan, M. Karunarathna, P. Samarasekara

引用次数: 0

First record of porcine babesiosis in Sri Lanka 斯里兰卡首次记录猪巴贝斯虫病

Ceylon Journal of Science Pub Date : 2023-03-01 DOI: 10.4038/cjs.v52i1.8110

R. Ranatunga, A. Dangolla, A. P. Bodahewa, K. H. Peiris, R. Rajakaruna, R. Senevirathne, R. Rajakaruna

引用次数: 0

Biosorption of Cr(III) and Pb(II) from synthetic wastewater under dynamic conditions – diffusion characteristics 动态条件下合成废水中Cr(III)和Pb(II)的生物吸附-扩散特性

Ceylon Journal of Science Pub Date : 2023-03-01 DOI: 10.4038/cjs.v52i1.8106

P. A. Kotabewatta, L. Lim, N. Priyantha