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196 results for “Biological Method”
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Research ArticleOpen accessIn the abstractIdentification and Antiproliferative Activity Evaluation of a Series of Triterpenoids Isolated from Flueggea virosa (Roxb. ex Willd.)Sod Monkodkaew, Chatchanok Loetchutinat, Narong Nuntasaen, Wilart PompimonProblem statement: Medicinal plants derived anticancer were now being subjects of many research groups especially, the secondary metabolite triterpenoids trees which had enormous potential to inspire and influence modern antiproliferative research. The study aimed to investigate the chemical constitution and their potential use as antiproliferative activity of purified compounds derived from F. virosa. Approach: The F. virosa was selected and … …American Journal of Applied Sciences, Vol. 6, Issue 10 · 30 Oct 2009 · 7,626 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Health Risk of Formaldehyde to Human BeingsS. Norliana, A. S. Abdulamir, F. Abu Bakar, A. B. SallehProblem statement: Formaldehyde was classified as a potential human carcinogen, identified by the US Environmental Protection Agency and International Agency for Research on Cancer as a Class 2A carcinogen. It also can cause irritation to human. However, formaldehyde present in biological fluids or tissues and environment as a result of natural processes or from man-made sources and can be emitted … …American Journal of Pharmacology and Toxicology, Vol. 4, Issue 3 · 30 Sep 2009 · 15,273 accessesView PDFCite
Research ArticleOpen accessIn the abstractPhytoplankton Community of Elechi Creek, Niger Delta, Nigeria-A Nutrient-Polluted Tropical CreekO. A. Davies, J. F.N. Abowei, C. C. TawariProblem statement: Elechi Creek of the Upper Bonny Estuary in the Niger Delta contributes to the Rivers State Fish resources. It is a sink receiving organic anthropogenic wastes from Diobu, Eagle Island and waterfront dwellers of Diobu areas. Fishing, car washing, bathing, swimming and other human activities are constantly going on within and around this creek. Based on these activities, … …American Journal of Applied Sciences, Vol. 6, Issue 6 · 30 Jun 2009 · 7,968 accessesView PDFCite
Research ArticleOpen accessIn the abstractA Philosophical Analysis of the Challenges of Science and Technology in Contemporary Africa: The Nigerian ExperimentAkinnawonu Benson MonehinScience and technology engendered unexpected social, political and health related problems. These included corrupt and dubious utilization of information and communication technology, environmental pollution and protection and depletion of the ozone layer which endangered human health. This sstudy examined the positive and negative implications of science and technology in Africa using Nigeria as a case study. This attempt became germane … …Journal of Social Sciences, Vol. 4, Issue 2 · 30 Jun 2008 · 8,267 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordThe Effect of Different Functional Microbial Agents on the Biological Characteristics and Rhizosphere Enzyme Activity of Hydroponic CucumberCe Wang, Ouya Zhao, Shiyou Sun et al.This study aims to comprehensively explore the effect of functional microbial agents on healthy soil cultivation and attempt to increase cucumber yield. Three different microbial agents were used for cucumber seedlings by virtue of the hydroponic cultivation method in order to study their effects on enzyme activity and seedling growth and reveal the relationship between rhizosphere enzyme activity and carbon, … …American Journal of Biochemistry and Biotechnology, Vol. 21, Issue 1 · 24 Mar 2025 · 5,510 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordBifurcation and Controlling Chaos in a Discrete-Time Biological SystemGuo FengThe dynamics of a discrete-time food chain model with strong pressure on preys is investigated. The types of equilibria of the system are analyzed using stability theory and bifurcation theory. The route to chaos via Neimark-Sacker bifurcation followed by period-doubling bifurcations of invariant curves is found for some parameter values through numerical simulation. Moreover, the chaos is controlled on the … …American Journal of Biochemistry and Biotechnology, Vol. 16, Issue 3 · 7 Jul 2020 · 6,681 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordSpectrofluorimetric, Atomic Absorption Spectrometric and Spectrophotometric Determination of Some FluoroquinolonesHesham SalemSimple, accurate, sensitive and selective spectrofluorimetric, atomic absorption spectrometric and spectrophotometric methods are described for the quantitative determination of ten fluoroquinolones (amifloxacin, ciprofloxacin hydrochloride, difloxacin hydrochloride, enoxacin, enrofloxacin, lomefloxacin hydrochloride, levofloxacin, norfloxacin, ofloxacin and pefloxacin mesylate). The first method was a spectrofluorimetric method in which samples of the studied drugs in 0.1 N H2SO4 showed native fluorescence at 450 nm … …American Journal of Applied Sciences, Vol. 2, Issue 3 · 31 Mar 2005 · 7,317 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordOptimization of Hydrodistillation Extraction by Response Surface Methodology and Evaluation of the Antioxidant and Antimicrobial Activities of Essential Oils from Phragmites communis (Cav) TrinXin-Tong Zou, Hong-Yuan Ma, Yu-He Li et al.The principal objectives of this study encompass three distinct aspects: firstly, to streamline the extraction process of Phragmites communis (Cav) Trin essential oil; secondly, to systematically analyze the essential oil’s chemical composition; and finally, to evaluate biological activity. Through the system optimization experiment, the optimal extraction process was determined: the crushing size was set to 10 mesh, the total solid-liquid … …American Journal of Biochemistry and Biotechnology, Vol. 21, Issue 3 · 6 Jan 2026 · 2,315 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordDiscrete to Continuous Algorithm for Optimal Channel Selection to Detect Alcoholism through EEG RecordingsHayat Sedrati, Wajih Rhalem et al.Alcoholism is a serious public health issue, and early diagnosis of this brain disease can be performed by analyzing Electroencephalogram (EEG) signals. However, the high dimensionality of EEG datasets requires significant computational time and resources for the automatic processing of EEG signals. This study proposes a novel method to reduce EEG dataset dimensionality using a Discrete to Continuous algorithm (DtC) … …Journal of Computer Science, Vol. 19, Issue 1 · 17 Jan 2023 · 5,904 accessesView PDFCite
Research ArticleOpen accessAll words, across the recordA New Development in Biological Process for Wastewater Treatment to Produce Renewable FuelKadhum M. Shabeeb, Khalid A. Sukkar, Rana A. Azeez et al.Problem statement: Hydrogen is a clean energy source. Bio-conversion of biomass to generate hydrogen has been achieved using anaerobic fermentation of some well-defined materials, in wastewater. No data available on hydrogen yielded from wastewater using inoculum extracted from Iraqi municipal wastewater treatment plant. Approach: This study investigated the effects of substrate concentration, initial pH and process temperature on biohydrogen production … …American Journal of Applied Sciences, Vol. 7, Issue 10 · 31 Oct 2010 · 7,252 accessesView PDFCite