Journal of Bangladesh Academy of Sciences最新文献_第6页

Removal of methylene blue and other pollutants from tannery wastewater using chemically modified tannery solid waste 利用化学改性制革厂固体废物去除制革厂废水中的亚甲基蓝和其他污染物

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.59693

Mohammad Nazmul Hossain, Md. Didarul Islam, Ashiqur Rahaman, M. Hasan, Meem Muhtasim Mahdi, Md. Arafat Hossain, N. Khatun, M. Matin

{"title":"Removal of methylene blue and other pollutants from tannery wastewater using chemically modified tannery solid waste","authors":"Mohammad Nazmul Hossain, Md. Didarul Islam, Ashiqur Rahaman, M. Hasan, Meem Muhtasim Mahdi, Md. Arafat Hossain, N. Khatun, M. Matin","doi":"10.3329/jbas.v46i1.59693","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.59693","url":null,"abstract":"The adsorption of methylene blue (MB) was investigated using the prepared activated carbon (AC); obtained by the chemical activation of chrome shaving dust (CSD). Results represented that the increase of particle size and impregnation ratio of AC possessed a proportional effect on the adsorption of MB. AC produced by H3PO3, impregnation ratio of 1:6, and mesh size of 40 showed the highest adsorption performance. The removal of other organic and inorganic pollutants from different tannery effluent was found satisfactory like pH, conductivity, turbidity, BOD5, COD, and Cl- values are reduced to 5.5- 8.48, 73-93%, 76-92%, 80-96%, 71-87% and 84-94%, respectively which are nearly closed to the WHO’s standards for industrial effluent to the environment. The microscopic analysis confirmed the smooth and porous surface characteristics of the adsorbent. Hence, CSDAC can be expected to become an effective, low-cost, and suitable adsorbent for both dye and pollutants removal from industrial wastewater.\u0000J. Bangladesh Acad. Sci. 46(1); 75-83: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78753963","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

Mathematical comparison of defuzzification of fuzzy logic controller for smart washing machine 智能洗衣机模糊控制器去模糊化的数学比较

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.56864

Md. Azharul Islam, Md. Sahadat Hossain

引用次数: 3

Prevalence and distribution of antimicrobial resistance profile of Escherichia coli isolated from various local fish markets in Dhaka city, Bangladesh 孟加拉国达卡市各当地鱼市场分离的大肠杆菌的流行和耐药性分布

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60344

M. Akter, M. Abedin, Md. Parvez Mosharaf, Mohammad Ariful Islam, Z. Hassan

{"title":"Prevalence and distribution of antimicrobial resistance profile of Escherichia coli isolated from various local fish markets in Dhaka city, Bangladesh","authors":"M. Akter, M. Abedin, Md. Parvez Mosharaf, Mohammad Ariful Islam, Z. Hassan","doi":"10.3329/jbas.v46i1.60344","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60344","url":null,"abstract":"Considering the importance of the fish and fish products as a vital part of the human diet in Bangladesh, the study aimed to estimate the microbial load, identify the E. coli and observe the isolates antibiogram pattern. Standard plate count technique, as well as the 3-tube most probable number (MPN) method, were applied to estimate the total viable bacteria (TVB) and total coliforms (TC), total fecal coliforms (TFC), and E. coli, respectively. Approximately 61.91% of samples fell into the marginally acceptable limit for TVB count, while 66.67% and 95.25% of examined species exceeded the threshold limit for TC and TFC, respectively (p<0.05). Around 90% of samples were contaminated with E. coli. A culture sensitivity test revealed that cent percent strains harbored resistance to penicillin, rifampicin, and erythromycin. Multiple antibiotic resistance (MAR) index above 0.2 may indicate the misuse or overuse of antibiotics. The findings highlight the potential food safety hazards associated with fish concerning the random use of antibiotics.\u0000J. Bangladesh Acad. Sci. 46(1); 9-18: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"68 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89033369","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

Preliminary CFD investigation for secondary coolant in molten salt reactor with alumina nanofluid considering FLiBe and FLiNaK as base fluid through a double pipe heat exchanger 以FLiBe和FLiNaK为基液的氧化铝纳米流体熔盐堆二次冷却剂通过双管换热器的CFD初步研究

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60346

J. Deb, Md. Mahidul Haque Prodhan, N. Hossain, G. S. Rakib

引用次数: 0

One nucleon pick-up reaction 58Ni(p,d)57Ni at 68 MeV 在68mev下，一个核子吸附反应58Ni(p,d)57Ni

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60347

S. A. Sultana, M. A. Rahman

引用次数: 0

Protease from jute endophyte Micrococcus luteus MBL-Bac7 functions as a potential bating agent for the leather industry 黄麻内生菌黄体微球菌MBL-Bac7蛋白酶是一种潜在的皮革加温剂

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60345

Md Enayet Ullah, Farhana Tasnim Chowdhury, Sharaf Aroni, A. Amin, Maqsud Hossain, Haseena Khan, M. R. Islam

{"title":"Protease from jute endophyte Micrococcus luteus MBL-Bac7 functions as a potential bating agent for the leather industry","authors":"Md Enayet Ullah, Farhana Tasnim Chowdhury, Sharaf Aroni, A. Amin, Maqsud Hossain, Haseena Khan, M. R. Islam","doi":"10.3329/jbas.v46i1.60345","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60345","url":null,"abstract":"Ever since the discovery of jute endophytes, testing their potential for commercial uses has been a matter of interest. Considering the same, jute endophyte Micrococcus luteus MBL-Bac7, capable of producing extracellular proteases, was selected for in vitro and in silico analysis to assess its role as a bating agent required in rawhide processing. The presence of extracellular protease was confirmed from the plate assay. As the enzyme is tested for commercial use, the effect of various metal ions and reaction conditions (pH, temperature) have been optimized. The protease activity appears to be retained even at 85°C. It also showed significant activity in a wide range of pH (pH 3.0-8.5). Metal ion Mn2+ increased the protease activity significantly, but Fe2+, Zn2+, and Co2+ ions showed the opposite effect. Molecular identification of the protease was done from the whole genome sequence data. Using PSORTb v.3.0.2, SecretomeP-1.0, TMHMM-2.0, and protein molecular weight software, the physicochemical properties of the protease were predicted. The isolated protease shared a strong evolutionary link with Micrococcus species' S8 family serine peptidase. Finally, in the bating of cowhide, effects similar to that of commercial agents were obtained during finger prick, lastometer, and tensile tests. The findings of this study corroborate the possibility of using this protease as a potential bating agent. However, further studies are necessary to reduce the production cost for higher yield and commercialization.\u0000J. Bangladesh Acad. Sci. 46(1); 31-43: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77984616","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

Goal programming approach for multi-objective optimization to the transportation problem in uncertain environment using fuzzy non-linear membership functions 用模糊非线性隶属函数求解不确定环境下运输问题的多目标优化方法

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.59791

M. Miah, Abdur Rashid, A. Khan, M. Uddin

引用次数: 2

Recycling of waste or crude lubricating oil by vacuum distillation to produce reusable lubricants and its economic viability evaluation 用真空蒸馏法回收废润滑油或粗润滑油生产可重复使用润滑油及其经济可行性评价

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.59052

Md. Rajibul Akanda, M. Hasan, Md. Abdur Rouf

引用次数: 1

The Sandor-Smarandache function with a prime factor Sandor-Smarandache函数带有一个素数因子

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60348

Abdullah Al Kafi Majumdar, H. Gunarto, Abul Kalam Ziauddin Ahmed

引用次数: 0

Comparison of different blood biomarkers of cervical cancer patients with control subjects 宫颈癌患者与对照组血液生物标志物的比较

Journal of Bangladesh Academy of Sciences Pub Date : 2022-06-29 DOI: 10.3329/jbas.v46i1.60443

NM Abdullah Al Mamun, Salwa Abdul Quyyum, Kohereen Bashar, Y. Kabir, Mustafizur Rahman, M. Islam

{"title":"Comparison of different blood biomarkers of cervical cancer patients with control subjects","authors":"NM Abdullah Al Mamun, Salwa Abdul Quyyum, Kohereen Bashar, Y. Kabir, Mustafizur Rahman, M. Islam","doi":"10.3329/jbas.v46i1.60443","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60443","url":null,"abstract":"Cervical cancer shows a high prevalence among Bangladeshi women. Reports indicated that oxidant-antioxidant balance plays a role in cervical cancer pathogenesis. Therefore, this study explores the change of different blood-derived enzymes, antioxidants, and biomarkers to understand the oxidative stress status of Bangladeshi cervical cancer patients. A clinician recruited the case and control participants for the study based on histopathologic reports. No significant difference was observed in the random blood glucose level, blood pressure, total cholesterol, triglycerides (TGs), HDL cholesterol, LDL cholesterol, and total protein levels in case participants compared to age and sex-matched control subjects. However, serum albumin, vitamins like alpha-tocopherol and ascorbic acid, antioxidant enzymes like SOD, and catalase levels significantly decreased in patients compared to controls. Other parameters, like, ALT, AST, ALP, phospholipid hydroperoxide, TBARS, protein carbonyl content, serum nitric oxide, cholesterol/phospholipid ratio (C/P) of erythrocyte and osmotic fragility were significantly increased in the case subjects compared to control. All of these reflect an oxidant-antioxidant imbalance in this setting. Thus, this study provides a detailed profile of the oxidant-antioxidant levels of the Bangladeshi cervical cancer patients, which revealed that the compromised antioxidant system in cervical cancer patients is associated with damage to various biomolecules and ultimately impairs cellular functions.\u0000J. Bangladesh Acad. Sci. 46(1); 117-128: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78508413","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: 1