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74 results for “column study”
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Research ArticleOpen accessIn the keywordsDissolved Ammonia Adsorption in Water Using Over Burnt BrickShukra Raj Paudel, Bhagwan Ratna KansakarProblem statement: The groundwater of Kathmandu Valley contained very high concentration of ammonia nitrogen which was in excess of WHO guideline value for drinking water. Approach: This study mainly focused on the removal of ammonia nitrogen in water by adsorption in locally available over burnt brick. The study was carried out in a 4.2 cm internal diameter column of 120 … …Energy Research Journal, Vol. 1, Issue 1 · 30 Jun 2010 · 8,451 accessesView PDFCite
Research ArticleOpen accessIn the keywordsBasic and Reactive Dyes Sorption Enhancement of Rice Hull through Chemical ModificationSiew-Teng Ong, Pei-Sin Keng, Chnoong-Kheng LeeProblem statement: Many studies have been conducted on the removal of either anionic or cationic dyes. However, as a mixture of dyes does commonly exist together in wastewater, therefore it is of great interest to have a material that can remove both types of dyes. Approach: To prepare an inexpensive and efficient sorbent by chemically modifying rice hull for the … …American Journal of Applied Sciences, Vol. 7, Issue 4 · 30 Apr 2010 · 7,787 accessesView PDFCite
Research ArticleOpen accessIn the abstractStudy of Ageratum conyzoides L. (Asteraceae) Phytochemical Composition as Quorum-sensing Inhibitors to Combat Antibiotic-resistant Bacterial InfectionsEli Compaoré, Lassané Ouedraogo, Ablassé Rouamba et al.The rise of antibiotic-resistant bacterial infections has intensified the search for plant-derived quorum-sensing (QS) inhibitors as alternative therapeutic strategies. Ageratum conyzoides L. has a long history of traditional use as an antimicrobial agent against multidrug-resistant pathogens, yet the phytochemical basis of its QS-inhibitory activity remains incompletely characterized. This study aimed to investigate the phytochemical composition of A. conyzoides and evaluate … …OnLine Journal of Biological Sciences, Vol. 26, Issue 1 · 3 Apr 2026 · 1,772 accessesView PDFCite
Research ArticleOpen accessIn the abstractThe Identification and Quantification of Marine Fish from Environmental DNA in Sulawesi Waters (Makassar Strait, Flores Sea and Bone Bay), IndonesiaNita Rukminasari, Andi Aliah Hidayani, Wilma Joanna Carolina Moka et al.The emergence of environmental DNA (eDNA) represents a recent methodological breakthrough for evaluating the presence of aquatic vertebrate species. This approach offers a relatively simple method with significant implications for conservation biology. Our study aim was to augment our understanding of marine fish biodiversity in Sulawesi waters. We employed eDNA metabarcoding to investigate fish biodiversity within Sulawesi waters, specifically focusing … …OnLine Journal of Biological Sciences, Vol. 24, Issue 4 · 5 Jul 2024 · 5,005 accessesView PDFCite
Research ArticleOpen accessIn the abstractSeparation, Purification and Anti-aging Activity of Tobacco PolysaccharidesMengyue Huang, Jingwu Song, Shuaishuai Chang et al.To separate tobacco polysaccharides and investigate their antioxidant and anti-aging properties, crude tobacco polysaccharides were extracted from raw tobacco using hot water, followed by purification through DEAE-52 cellulose column chromatography. The molecular weight and monosaccharide composition of the isolated polysaccharides were analyzed using HPGPC and HPLC. The antioxidant activities of these tobacco polysaccharides were tested using DPPH, ABTS, hydroxyl radicals … …American Journal of Biochemistry and Biotechnology, Vol. 21, Issue 1 · 15 Jan 2025 · 5,103 accessesView PDFCite
Research ArticleOpen accessIn the abstractStability, Stress and Strain Analysis of Very Slender Pinned Thin-Walled Box Columns according to FEM, Euler and TSThKrzysztof Murawski, Alexandre de Macêdo WahrhaftigIn this study, a Finite Element Method (FEM) analysis is presented for the loss of stability in elastic states of very slender pinned without friction box-section thin-walled column axially compressed. From the FEM buckling linear stress analyses are determined the compressing critical forces for 36 cases, presented in tables and as the surface functions in dependence on the slenderness ratio … …American Journal of Engineering and Applied Sciences, Vol. 14, Issue 2 · 11 May 2021 · 7,192 accessesView PDFCite
Research ArticleOpen accessIn the abstractParametric Study to Maximize the Useful Life of Reinforced Concrete ColumnsTamires L. Mezzomo, Moacir KripkaThe current scenario of structural engineering is guided by the growing ecological concern and constant search for efficient and economic structural solutions. In this sense, aspects related to the durability of structures have become a significant topic of study. Based on this context, the purpose of this work was to provide resources that allow the maximization of the useful life … …International Journal of Structural Glass and Advanced Materials Research, Vol. 5, Issue 1 · 8 Jun 2021 · 6,543 accessesView PDFCite
Research ArticleOpen accessIn the abstractAnalysis of Non-Equilibrium Phase Change in Transfers at Low Water Content by Considering the Film FlowMarcel Bawindsom Kébré, François Ouédraogo, Bétaboalé Naon et al.In this study, we analyze the effect of non-equilibrium phase change on transfer at low water content in a sandy soil by considering the contribution of film flow in the motion of liquid water. Indeed, most of the non-equilibrium study methods use for hydraulic conductivity, the van Genuchten-Mualem (VGM) capillary model which does not consider the film flow occurred at … …American Journal of Environmental Sciences, Vol. 17, Issue 1 · 1 Jun 2021 · 6,395 accessesView PDFCite
Research ArticleOpen accessIn the abstractEvaluation of Antioxidant and Antibacterial Activities of the Polysaccharides from Mycelium and the Culture Medium of Pleurotus Eryngii Strain UN-1Qing Liu, Haodong Wu, Ying Wu et al.Pleurotus eryngii was one of the most precious and ordinary edible mushrooms, and its polysaccharides were the major active substances. In this study, P. eryngii strain UN-1 was cultured in a liquid medium at 25℃ under a shaking of 80 rpm for 7 days. Two crude polysaccharides named CPN and CPNM were obtained from the mycelium of P. eryngii UN-1 … …American Journal of Biochemistry and Biotechnology, Vol. 18, Issue 3 · 19 Jul 2022 · 6,176 accessesView PDFCite
Research ArticleOpen accessIn the abstractEffects of Purified Tick Saliva Toxins on Various Bio-Molecules in Blood Serum, Liver and Muscles of Albino MiceNidhi Yadav, Ravi Kant UpadhyayIn the present study, salivary toxins from Rhipicephalus microplus were isolated and purified on a Sepharose CL 6B 200 gel column at a constant flow rate with regular fractions of 5 mL/min. Pooled fractions were lyophilized and LD50 was then determined in albino mice. The LD50 value of the protein toxin of Rhipicephalus microplus was found 36.11 mg/kg body weight … …American Journal of Animal and Veterinary Sciences, Vol. 19, Issue 1 · 30 Dec 2023 · 5,354 accessesView PDFCite