Journal of Applied Sciences and Environmental Management最新文献_第2页

Impact of Crude Oil Polluted Soil on Seedling Morphological Characteristics and Biomass Accumulation of Monodora myristica (African Nutmeg) 原油污染土壤对非洲肉豆蔻（Monodora myristica）幼苗形态特征和生物量积累的影响

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.2

Fredrick, U. Chima, A. Alex, PC Okwusike

引用次数: 0

Evaluation of Probiotic Quality of Lactic Acid Bacteria Isolated from Locally Fermented Palm Wine and Kunu from Sellers in Oluku and Oba Markets in Benin City, Edo State, Nigeria 从尼日利亚埃多州贝宁市奥卢库和奥巴市场的当地发酵棕榈酒和库努（Kunu）销售商处分离的乳酸菌的益生菌质量评估

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.16

OO Amengialue, FA Igiebor, PA Egharevba, B. Omoregie, JO Opara

{"title":"Evaluation of Probiotic Quality of Lactic Acid Bacteria Isolated from Locally Fermented Palm Wine and Kunu from Sellers in Oluku and Oba Markets in Benin City, Edo State, Nigeria","authors":"OO Amengialue, FA Igiebor, PA Egharevba, B. Omoregie, JO Opara","doi":"10.4314/jasem.v28i2.16","DOIUrl":"https://doi.org/10.4314/jasem.v28i2.16","url":null,"abstract":"Commonly used probiotics bacteria are the lactic acid bacteria (LAB) from the gastro intestinal tract. However, other LAB from exogenous origin having similar functional properties can also confer health benefit to the host. The objective of this work is to evaluate the probiotic quality of lactic acid bacteria isolated from locally fermented palm wine and kunu from sellers in Oluku and Oba markets in Benin City, Edo State, Nigeria using standard microbiological methods. Lactobacillus fermentum, Lactobacillus plantarum, Lactobacillus acidophilus and Lactobacillus casei were isolated from palm wine and kunu, and they were assessed for the following: resistance to simulated gastric and intestinal fluids, resistance to bile salt and low pH, haemolytic activity and their antimicrobial characteristic against some bacteria pathogens, mainly; Staphylococcus aureus, Klebsiella pneumonia, Pseudomonas aeruginosa and Escherichia coli. Results showed resistance/tolerance and cell viability of all LAB isolates to simulated gastric and intestinal fluids, and low pH resistance of all isolates were negative at pH 2 but positive with viable cell growth at pH 3. The L. fermentum, L. plantarum, and L. acidophilus were not haemolytic while L. casei was haemolytic (alpha haemolysis). The LAB isolates were more resistance to bile salt (with viable cell growth) at 0.1% and 0.3% concentration compared to 0.5% concentration. Antibacterial activity testing showed that L. acidophilus and L. casei had antibacterial property against Pseudomonas aeruginosa, while L. plantarum and L. fermentum had antibacterial property against Staphylococcus aureus and Klebsiella pneumonia respectively. While all lactic acid bacteria (Lactobacillus species) isolated from the locally fermented food/product samples demonstrated strong probiotic characteristic properties, further in-vivo study to establish their probiotic potential is recommended.","PeriodicalId":15093,"journal":{"name":"Journal of Applied Sciences and Environmental Management","volume":"37 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140432623","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

Impact of Variable Thermal Conductivity and Viscosity on Powell-Eyring Fluid in the Presence Of Thermal Radiation through a Porous Medium 热辐射通过多孔介质时不同导热系数和粘度对鲍威尔-艾林流体的影响

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.5

S. A. Idowu, M. A. Usman, B. Peter, F. A. Hammed

引用次数: 0

Mechanical Strength, Characterization and Suitability of Cement-Plastic Concrete Admixture 水泥塑料混凝土外加剂的机械强度、特性和适用性

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.14

S. A. Abubakar, A. O. Hamzat, T. D. Akpenpuun

{"title":"Mechanical Strength, Characterization and Suitability of Cement-Plastic Concrete Admixture","authors":"S. A. Abubakar, A. O. Hamzat, T. D. Akpenpuun","doi":"10.4314/jasem.v28i2.14","DOIUrl":"https://doi.org/10.4314/jasem.v28i2.14","url":null,"abstract":"A significant increment in the consumption of plastic has been monitored globally in recent years, which has led to a high amount of plastic waste. Given its benefits on both an economic and ecological level, recycling plastic waste to create new materials like concrete is considered to be one of the finest ways to get rid of plastic waste. The objective of this paper was to examine the workability, durability, and mechanical strength of concrete with partial replacement of coarse aggregates with plastic waste using standard procedure. The percentages of plastic waste used to replace coarse aggregate were 0%, 5%, 10%, and 15%. Lastly, the mechanical characteristics of the concrete mix specimens was determined by testing them using a testometric and compressor machine. The specimens are then compared with the conventional mix. The test results demonstrated that the compressive strength exhibited a decreasing trend. For mixes ranging from 0% to 15%, the compressive strength varies from 35.66 to 17.88 N/mm2, however the flexural strength significantly decreases when 15% of the coarse aggregate is replaced with plastic waste. It can be concluded that reusing plastic waste as an aggregate during the concrete-making process reduces waste and conserves resources.","PeriodicalId":15093,"journal":{"name":"Journal of Applied Sciences and Environmental Management","volume":"18 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140433190","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

Phytotoxicity Assay of Cu, Pb and Zn on Launaea cornuta and Sporobolus jacquemontii Grown in Heavy Metal contaminated soil 铜、铅和锌对生长在重金属污染土壤中的粟叶褐藻和褐藻的植物毒性分析

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.20

S. K. Mkumbo

{"title":"Phytotoxicity Assay of Cu, Pb and Zn on Launaea cornuta and Sporobolus jacquemontii Grown in Heavy Metal contaminated soil","authors":"S. K. Mkumbo","doi":"10.4314/jasem.v28i2.20","DOIUrl":"https://doi.org/10.4314/jasem.v28i2.20","url":null,"abstract":"In this paper, a phytotoxicity assay is used to assess the harmfulness and tolerance of L. cornuta and S. jacquemontii in phytoremediation of heavy metal-contaminated soils. The effects of Pb, Cu, and Zn concentrations in the soil on the number of leaves generated, root and shoot growth, and tolerance indices of the investigated plant species were analyzed. The experimental plants were grown in soil with 0, 100, 300, 600, 1500, 2000, 2500, and 3000 mg/kg dry soil weight (DW for Pb, Cu, and Zn). Sample preparation and laboratory analysis followed the standard methods. Data were analyzed with one-way analysis of variance (ANOVA) using GraphPad Instat 3.1 software. The growth mean of different treatments was compared using Duncan’s Multiple Range Test at p < 0.05. Plants grown in soil containing more than 300/kg DW metal contents exhibited a significant effect on the growth of the root and shoot. Concentrations lower than 300 did not show any significant effects. At 1500 mg/kgDW, the numbers and sizes of leaves decreased very significantly, while at 2000 mg/kgDW both plants failed to survive. The toxic effects of the metals on biomass production showed inhibition in the following trend: Zn>Cu>Pb. The results suggest that hyper accumulator plants can also be affected by metals in the soils on which they grow. Therefore, the application of L. cornuta and S. jacquemontii as phytoremediation plants at higher metal soil concentrations requires the application of soil amendments to minimize the toxicity effect of metal on the plants.","PeriodicalId":15093,"journal":{"name":"Journal of Applied Sciences and Environmental Management","volume":"100 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140433593","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

Geochemical and Organic Petrological Evaluation of Organic Matter from Tertiary Sediments of Baga Field in Chad Basin, Northeast Nigeria 尼日利亚东北部乍得盆地巴加油田第三纪沉积物中有机物质的地球化学和有机岩石学评价

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.22

MU Uzoegbu, Oghonyon

{"title":"Geochemical and Organic Petrological Evaluation of Organic Matter from Tertiary Sediments of Baga Field in Chad Basin, Northeast Nigeria","authors":"MU Uzoegbu, Oghonyon","doi":"10.4314/jasem.v28i2.22","DOIUrl":"https://doi.org/10.4314/jasem.v28i2.22","url":null,"abstract":"The Upper Cretaceous sediments in Bornu are considered an important regional source rock in the Chad Basin. This study therefore evaluated the geochemical and organic petrological evaluation of organic matter in tertiary sediments of Chad Basin, Northeast Nigeria by collecting 25 cutting samples from these organic-rich shale sediments from four wells drilled in Baga field in the Nigeria sector (Bornu) of the Chad Basin, in order to geochemically assess the type of organic matter, thermal maturity, and palaeoenvironmental conditions. Results reveal that Bornu sediments contain high organic matter more than 2.0 wt% TOC and have an excellent oil-generation potential. This is supported by high bitumen extractions and hydrocarbon yields with values 5827 and 3547 ppm, respectively. The investigated biomarkers indicated that the shale sediments contain a high abundance of C27 regular sterane concentrations, high C27/C29 regular sterane ratios and relatively low value of the biomarker sterane/hopane ratio as well as the presence of tricyclic terpanes. A mainly suboxic to relatively anoxic preservation conditions is inferred from Pr/Ph ratios (1.03–2.53). This is support by normal alkane distributions, which are characterized by dominance of types I/II kerogen and low medium molecular weight n-alkane compounds, respectively. This is further supported by lower amounts of acyclic isoprenoids compared to n-alkanes (e.g., pristane/n-C17 and phytane/n-C18 ratios). This is also supported by a mixture of algal and amorphous organic matter that was deposited in a lacustrine environment identified from kerogen microscopy. Based on the analyzed biomarkers, triterpanes and terpanes thermal maturity indicates that the Bornu sediments organic matters have entered into early mature stage for oil generation. This is also supported by vitrinite reflectance values of 0.57–0.71 % Ro indicate that these organic matters have reached oil window maturity.","PeriodicalId":15093,"journal":{"name":"Journal of Applied Sciences and Environmental Management","volume":"11 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140432337","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

Production of Sequential Interpenetrating Polymer Networks from Ximenia americana Seed Oil-based Polyurethanes and Polystyrene 利用美洲茜草籽油基聚氨酯和聚苯乙烯生产序贯互穿聚合物网络

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.21

A. Samuel, I. Eromosele, S. Kamba, D. Samaila

{"title":"Production of Sequential Interpenetrating Polymer Networks from Ximenia americana Seed Oil-based Polyurethanes and Polystyrene","authors":"A. Samuel, I. Eromosele, S. Kamba, D. Samaila","doi":"10.4314/jasem.v28i2.21","DOIUrl":"https://doi.org/10.4314/jasem.v28i2.21","url":null,"abstract":"Interpenetrating polymer network are combinations of two or more polymer in network form. The objective of this paper was to evaluate the production and characterization of sequential polyurethane-polystyrene interpenetrating polymer networks from different diisocyanates and varied styrene content using Ximenia americana seed oil as base material. The polymer networks were characterized for their Tensile, Swelling and Thermal properties. The tensile strength and tensile modulus for MDPU-1.50-PS polymer networks, 57.86 ±5.42 - 422.85±15.25 MPa and 2.26±0.91 - 11.08±4.21 MPa respectively are higher than the values represented for HDPU-1.50-PS and TDPU-1.50-PS polymer networks, but the latter polymer networks are higher in values for elongation at break than the former. This is also corroborated by the swelling mass ratio (qm) with values for HDPU-1.50-PS and TDPU-1.50-PS networks higher than those for MDPU-1.50-PS, consistent with lower polystyrene crosslinks in the former polymer networks. Thermal studies present HDPU-1.50-PS-20 as the most stable network at 10% degradation, but at higher degradation temperatures MDPU-1.50-PS-20 polymer network shows stability up to 6000C with 19.40g residual weight of char polymer. This study shows that derivatised Ximenia americana seed oil is suitable as starting material for preparation of an interpenetrating polymer network.","PeriodicalId":15093,"journal":{"name":"Journal of Applied Sciences and Environmental Management","volume":"54 159","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140432542","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

Stormwater Quantity and Quality Management Options in Rapidly Urbanizing Watersheds: The Case of Mbezi River Catchment in Dar Es Salaam-Tanzania 快速城市化流域的暴雨水量和水质管理方案：坦桑尼亚达累斯萨拉姆姆贝齐河集水区案例

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.24

Mhina, PR Mapinduzi

引用次数: 0

Assessment of Flexural Strengths and Flexural Load Bearing Capacity of Bamboo Grids-Reinforced Soil Beam 竹格栅加固土梁的抗弯强度和抗弯承载力评估

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.6

ME Ole Onyia, So

引用次数: 0

Single and Combined Aluminium and Cadmium Exposure during Pregnancy Mediate Changes in Cardio Metabolic Indices in Mice 妊娠期单一或联合接触铝和镉可介导小鼠心血管代谢指标的变化

Journal of Applied Sciences and Environmental Management Pub Date : 2024-02-25 DOI: 10.4314/jasem.v28i2.19

O. P. Onavwose, P. Ichipi-Ifukor, S. O. Asagba

引用次数: 0