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175 articles for “isolation”
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Research ArticleOpen accessEvery word in the titleSocial Isolation and Suicidal Ideation Among University Students in Enugu State, Nigeria: A Qualitative PerspectiveCollins Chukwunonso EzeaUniversity students face growing mental health challenges, yet social isolation as a contributor to suicidal ideation remains understudied in Nigeria, particularly from the perspectives of students themselves. Understanding how isolation influences suicidal thinking is essential for designing context-sensitive interventions within Nigerian higher education environments. Despite a global rise in suicide among young adults, existing literature remains largely Western-centric, offering limited … …Journal of Social Sciences, Vol. 21, Issue 1 · 23 Dec 2025 · 3,430 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleBioassay Guided Isolation of Antibacterial Compounds from Andrographis paniculataAbubakar Sule, Qamar Uddin Ahmed, Othman Abd. Samah et al.Problem statement: Chronic disease-causing bacteria of medical importance have developed resistance to antibiotics, hence, necessitating distinct and constant need for safe and efficient therapeutic agents. Plants are considered potent candidate for this aim. A way out of reducing antibiotic resistance and adverse effects on host is the employment of antibiotic resistance inhibitors of plant origin. Approach: About 5 kg pulverized … …American Journal of Applied Sciences, Vol. 8, Issue 6 · 13 Jun 2011 · 10,025 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Identification of Epiphytic Lactic Acid Bacteria from Guinea Grass (Panicum maximum)M. Pasebani, H. Yaakub, K. Sijam, A.R. AlimonProblem statement: Bacteria can perform a variety of beneficial functions, for example many lactic acid bacteria are responsible for fermentation of silage in the process of forage conservation. In the making of silage, epiphytic lactic acid bacteria are usually insufficient in numbers to promote efficient lactate fermentation. This study was conducted to identify the predominant indigenous bacteria, with emphasis on … …American Journal of Animal and Veterinary Sciences, Vol. 5, Issue 2 · 30 Jun 2010 · 8,482 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleReduction of Isolation Period of Coal Humic AcidsClaudia Hui Hui Chen, Osumanu Haruna Ahmed, Nik Muhamad Ab. Majid, Mohamadu Boyie JallohProblem statement: The isolation of Humic Acids (HA) from coal is laborious, costly and time consuming. The extraction and fractionation periods of HA vary from 4 h to 7 days. Fractionation period ranges from 12-24 h. However, most studies use 24 h as extraction period and also 24 h as fractionation period. This study was conducted to investigate whether the … …American Journal of Applied Sciences, Vol. 6, Issue 7 · 31 Jul 2009 · 7,234 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleDetermination of Minimal Duration Essential for Isolation of Humic Acids From Soils in Forest Restoration ProgrammesMohd Ramzan Nur Hanisah, Osumanu Haruna Ahmed, Kasim Susilawati et al.This study was conducted to investigate whether a simple and rapid method could be developed for extracting, fractionating and purifying soil HA in forest rehabilitation programmes. Humic acids from 10 g of soil were extracted with 100 mL of 0.10 M NaOH. Different extraction periods (4, 8, 12, 16, 20 and 24 h) were tested. Samples were centrifuged (16,211 G … …American Journal of Agricultural and Biological Sciences, Vol. 3, Issue 3 · 30 Sep 2008 · 8,173 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleFault Detection and Isolation in Dynamic Systems using Statistical Local Approach and Hybrid Least Squares AlgorithmBelkacem Athamena, Zina Houhamdi, Mohammed MuhairatA fault detection and isolation (FDI) scheme for dynamic system proposed. This study deals with the design of discrete-time linear system using delta operator approach and the hybrid least squares (HLS) algorithm. A third residual generation based on statistical local approach and the derivative of the normalized residual on a small temporal window investigated. This new technique meets the desired … …American Journal of Applied Sciences, Vol. 4, Issue 12 · 31 Dec 2007 · 7,430 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Mutagenesis of Streptokinase Producing BacteriaThaer Taleb Abed Abdelghani, Adinarayana Kunamneni, Poluri EllaiahOf 103 β-haemolytic Streptococci (with haemolytic activity) in total were isolated from different samples of blood and biomass from infected throat, 47 isolates exhibited streptokinase (SK) activity. T3, identified as a new variant of Streptococcus equisimilis, was found to be excellent SK producer in submerged fermentation and was selected for strain improvement studies. This strain was mutagenized by UV and … …American Journal of Immunology, Vol. 1, Issue 4 · 31 Dec 2005 · 7,789 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Characterization of Collagen from IndonesiaLocal Duck Feet Using Bromelain EnzymeRafika Mila Amanah, Dita Prameswari Trenggono Putri, Mohammad Zainal Abidin et al.The utilization of local duck feet as a collagen source to minimizewaste and add value to the duck by-product. This research aimed to isolate andcharacterize collagen from Local duck feet using enzymatic method. Thebromelain enzyme in various concentrations: 0% (A), 0.2% (B), 0.4%(C), 0.6%(D), and 0.8% (E). Variables observed were collagen yield, viscosity, pH,Fourier Transform Infrared Spectroscopy (FTIR), and Sodium … …American Journal of Animal and Veterinary Sciences, Vol. 20, Issue 2 · 24 May 2025 · 5,165 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Identification of Bacteria Leading to Microbial Spoilage of Sweet Potato and Screening for Antistaling Agents Running HeadDaoqi Liu, Huili Liu, Yuanyuan Dang et al.To develop natural preservatives tailored for sweet potatoes, the control effect of essential oils on the spoilage microorganisms of sweet potatoes is uncertain. Therefore, we first isolated and identified the dominant spoilage bacteria from spoiled sweet potatoes. Micrococcus aloeverae, Priestia aryabhattai, and Glutamicibacter arilaitensis were identified through screening, morphological observation, gram staining, and 16S rDNA assays. Subsequently, five plant essential … …American Journal of Biochemistry and Biotechnology, Vol. 20, Issue 1 · 26 Apr 2024 · 5,221 accessesView PDFCite
Research ArticleOpen accessEvery word in the titleIsolation and Characterization of Chemical Constituents, Cytotoxicity, Antibacterial and Antioxidant Activity of the Compounds from Leptadenia hastata Roots Extract ByIsaac John Umaru, Hauwa A. UmaruThe aim of this work was to extract, isolate and characterise the chemical constituent from Leptadenia hastata roots. Fresh roots were washed and dried and was subjected to sequential maceration in polar and non-polar solvents. And introduced into rotary evaporator to concentrate the extract. Isolated compound was subjected to Thin Layer Chromatography and spectral analysis such as column and UV-Visible … …American Journal of Biochemistry and Biotechnology, Vol. 15, Issue 4 · 24 Dec 2019 · 7,959 accessesView PDFCite