Pub Date : 2022-06-29DOI: 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
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. J. Bangladesh Acad. Sci. 46(1); 75-83: June 2022
{"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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.56864
Md. Azharul Islam, Md. Sahadat Hossain
This is the age of modern science where different kinds of gadgets are used for the betterment of humanity. Various electronic, intelligence systems are invented via modern technology where FLC (Fuzzy Logic Controller) is used to develop their intelligence systems. Nowadays, FLC is widely used in uncertainty and robust development systems. Two inputs and one output have been used in this paper. Also, various defuzzification methods are used to determine the washing time of a smart washing machine. Finally, the performance of the various defuzzification methods has been compared mathematically. This work has been simulated by using the MATLAB toolbox. J. Bangladesh Acad. Sci. 46(1); 1-8: June 2022
{"title":"Mathematical comparison of defuzzification of fuzzy logic controller for smart washing machine","authors":"Md. Azharul Islam, Md. Sahadat Hossain","doi":"10.3329/jbas.v46i1.56864","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.56864","url":null,"abstract":"This is the age of modern science where different kinds of gadgets are used for the betterment of humanity. Various electronic, intelligence systems are invented via modern technology where FLC (Fuzzy Logic Controller) is used to develop their intelligence systems. Nowadays, FLC is widely used in uncertainty and robust development systems. Two inputs and one output have been used in this paper. Also, various defuzzification methods are used to determine the washing time of a smart washing machine. Finally, the performance of the various defuzzification methods has been compared mathematically. This work has been simulated by using the MATLAB toolbox.\u0000J. Bangladesh Acad. Sci. 46(1); 1-8: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"39 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74812388","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60344
M. Akter, M. Abedin, Md. Parvez Mosharaf, Mohammad Ariful Islam, Z. Hassan
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. J. Bangladesh Acad. Sci. 46(1); 9-18: June 2022
{"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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60346
J. Deb, Md. Mahidul Haque Prodhan, N. Hossain, G. S. Rakib
This work analyzes a computational fluid dynamics (CFD) methodology based on ANSYS to investigate the 3 % and 4 % volume fraction alumina (Al2O3) nanofluids with base fluids FLiBe (LiF(67)-BeF2(33) (mol%)) and FLiNaK (LiF(46.5)-NaF(11.5)-KF(42) (mol%) through a double pipe heat exchanger. The purpose of the paper is to choose better candidates as secondary coolants in molten salt reactors for better thermodynamics performances and heat transfer characteristics. Six secondary coolants with and without nanofluids and fuel salt as primary coolants are driven through the inner and outer pipe. Later overall heat transfer coefficient, outlet temperatures and pressure drops of the fluids, and LMTD are calculated. Thus, this work eventually recommends the best candidate as a secondary coolant by CFD methodology using ANSYS-FLUENT 18.1. J. Bangladesh Acad. Sci. 46(1); 45-55: June 2022
{"title":"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","authors":"J. Deb, Md. Mahidul Haque Prodhan, N. Hossain, G. S. Rakib","doi":"10.3329/jbas.v46i1.60346","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60346","url":null,"abstract":"This work analyzes a computational fluid dynamics (CFD) methodology based on ANSYS to investigate the 3 % and 4 % volume fraction alumina (Al2O3) nanofluids with base fluids FLiBe (LiF(67)-BeF2(33) (mol%)) and FLiNaK (LiF(46.5)-NaF(11.5)-KF(42) (mol%) through a double pipe heat exchanger. The purpose of the paper is to choose better candidates as secondary coolants in molten salt reactors for better thermodynamics performances and heat transfer characteristics. Six secondary coolants with and without nanofluids and fuel salt as primary coolants are driven through the inner and outer pipe. Later overall heat transfer coefficient, outlet temperatures and pressure drops of the fluids, and LMTD are calculated. Thus, this work eventually recommends the best candidate as a secondary coolant by CFD methodology using ANSYS-FLUENT 18.1.\u0000J. Bangladesh Acad. Sci. 46(1); 45-55: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87850557","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60347
S. A. Sultana, M. A. Rahman
The double differential cross-section for the 58Ni(p,d)57Ni reaction has been studied with 68 MeV protons for the 25o, 30o, 35o, 45o, and 60o laboratory angles. The spectra have been calculated using DWBA-based cross-sections including an asymmetric form of the Lorentzian strength function containing energy-dependent spreading widths. The comparison between the measured spectra and the theoretical predictions is accomplished in the direct reaction region. The values of the calculated double differential cross-sections agree with those of the measured cross-sections as far as ~17 MeV deuteron excitation energies; the ejectile deuterons-energy for direct reactions at 68 MeV proton energy. J. Bangladesh Acad. Sci. 46(1); 57-63: June 2022
{"title":"One nucleon pick-up reaction 58Ni(p,d)57Ni at 68 MeV","authors":"S. A. Sultana, M. A. Rahman","doi":"10.3329/jbas.v46i1.60347","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60347","url":null,"abstract":"The double differential cross-section for the 58Ni(p,d)57Ni reaction has been studied with 68 MeV protons for the 25o, 30o, 35o, 45o, and 60o laboratory angles. The spectra have been calculated using DWBA-based cross-sections including an asymmetric form of the Lorentzian strength function containing energy-dependent spreading widths. The comparison between the measured spectra and the theoretical predictions is accomplished in the direct reaction region. The values of the calculated double differential cross-sections agree with those of the measured cross-sections as far as ~17 MeV deuteron excitation energies; the ejectile deuterons-energy for direct reactions at 68 MeV proton energy.\u0000J. Bangladesh Acad. Sci. 46(1); 57-63: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82759297","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60345
Md Enayet Ullah, Farhana Tasnim Chowdhury, Sharaf Aroni, A. Amin, Maqsud Hossain, Haseena Khan, M. R. Islam
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. J. Bangladesh Acad. Sci. 46(1); 31-43: June 2022
{"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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.59791
M. Miah, Abdur Rashid, A. Khan, M. Uddin
The ultimate goal of the decision maker (DM) is to take right decisions to optimize the profit or loss of the organization when the parameters of the transportation problem are ambiguous because of some uncontrollable effects. In this paper, mathematical models are proposed using fuzzy non-linear membership functions and the inverse uncertain normal distribution has been used to eliminate the uncertainty in the parameters which will help the DM to find a compromise solution of the uncertain multi-objective transportation problem (UMOTP) and to achieve the desired goals for a chosen level of confidence for the uncertain parameters. The compromise solutions of the uncertain multi-objective transportation problem are presented to obtain the DM satisfaction if the problem becomes achievable for this preferred confidence level of the parameters. Numerical illustration is given where Linear Programming Problems (LPPs) are resolved with LINGO and the graphs are designed with the help of MATLAB 18.00. J. Bangladesh Acad. Sci. 46(1); 101-115: June 2022
{"title":"Goal programming approach for multi-objective optimization to the transportation problem in uncertain environment using fuzzy non-linear membership functions","authors":"M. Miah, Abdur Rashid, A. Khan, M. Uddin","doi":"10.3329/jbas.v46i1.59791","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.59791","url":null,"abstract":"The ultimate goal of the decision maker (DM) is to take right decisions to optimize the profit or loss of the organization when the parameters of the transportation problem are ambiguous because of some uncontrollable effects. In this paper, mathematical models are proposed using fuzzy non-linear membership functions and the inverse uncertain normal distribution has been used to eliminate the uncertainty in the parameters which will help the DM to find a compromise solution of the uncertain multi-objective transportation problem (UMOTP) and to achieve the desired goals for a chosen level of confidence for the uncertain parameters. The compromise solutions of the uncertain multi-objective transportation problem are presented to obtain the DM satisfaction if the problem becomes achievable for this preferred confidence level of the parameters. Numerical illustration is given where Linear Programming Problems (LPPs) are resolved with LINGO and the graphs are designed with the help of MATLAB 18.00.\u0000J. Bangladesh Acad. Sci. 46(1); 101-115: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"108 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89268146","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.59052
Md. Rajibul Akanda, M. Hasan, Md. Abdur Rouf
Recycling waste or crude lubricant oil is the best alternative to incineration. This article used the vacuum distillation method to recycle of waste lubricant oil. About 90% of lubricating oil was recovered from waste oil within the temperature range of 60-360 0C. Every measured property like density, viscosity, flash point, pour point, sulfur content, carbon residue, ash content, and water content were investigated and compared with fresh oil. Pour point was found not to improve through vacuum distillation but rather decreased. Similarly, vacuum distillation could not improve the viscosity and density of recycled material but rather decreased. Adding 2% EPDM, SPO ESPRENE V0141, and pellet form of rubber as additives increased those two properties significantly. Finally, 0.1% NaNO3 was also added as an antioxidant. So, lastly, it can be concluded that the vacuum distillation process can effectively recycle waste lubricant oil in an economical and environmentally friendly manner. J. Bangladesh Acad. Sci. 46(1); 19-29: June 2022
{"title":"Recycling of waste or crude lubricating oil by vacuum distillation to produce reusable lubricants and its economic viability evaluation","authors":"Md. Rajibul Akanda, M. Hasan, Md. Abdur Rouf","doi":"10.3329/jbas.v46i1.59052","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.59052","url":null,"abstract":"Recycling waste or crude lubricant oil is the best alternative to incineration. This article used the vacuum distillation method to recycle of waste lubricant oil. About 90% of lubricating oil was recovered from waste oil within the temperature range of 60-360 0C. Every measured property like density, viscosity, flash point, pour point, sulfur content, carbon residue, ash content, and water content were investigated and compared with fresh oil. Pour point was found not to improve through vacuum distillation but rather decreased. Similarly, vacuum distillation could not improve the viscosity and density of recycled material but rather decreased. Adding 2% EPDM, SPO ESPRENE V0141, and pellet form of rubber as additives increased those two properties significantly. Finally, 0.1% NaNO3 was also added as an antioxidant. So, lastly, it can be concluded that the vacuum distillation process can effectively recycle waste lubricant oil in an economical and environmentally friendly manner.\u0000J. Bangladesh Acad. Sci. 46(1); 19-29: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"112 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85062923","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60348
Abdullah Al Kafi Majumdar, H. Gunarto, Abul Kalam Ziauddin Ahmed
The Sandor-Smarandache function, denoted by SS(n), is a newly-introduced Smarandache-type arithmetic function. This paper focuses on the functions SS(30p), SS(60p), SS(210p), SS(420p) and SS(840p), where p ( ≥2) is a prime. At the end of the paper, four tables, giving the values of SS(30p), SS(60p), SS(210p) and SS(420p) for the first 200 primes, calculated on a computer, are given. J. Bangladesh Acad. Sci. 46(1); 65-73: June 2022
{"title":"The Sandor-Smarandache function with a prime factor","authors":"Abdullah Al Kafi Majumdar, H. Gunarto, Abul Kalam Ziauddin Ahmed","doi":"10.3329/jbas.v46i1.60348","DOIUrl":"https://doi.org/10.3329/jbas.v46i1.60348","url":null,"abstract":"The Sandor-Smarandache function, denoted by SS(n), is a newly-introduced Smarandache-type arithmetic function. This paper focuses on the functions SS(30p), SS(60p), SS(210p), SS(420p) and SS(840p), where p ( ≥2) is a prime. At the end of the paper, four tables, giving the values of SS(30p), SS(60p), SS(210p) and SS(420p) for the first 200 primes, calculated on a computer, are given.\u0000J. Bangladesh Acad. Sci. 46(1); 65-73: June 2022","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73500692","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}
Pub Date : 2022-06-29DOI: 10.3329/jbas.v46i1.60443
NM Abdullah Al Mamun, Salwa Abdul Quyyum, Kohereen Bashar, Y. Kabir, Mustafizur Rahman, M. Islam
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. J. Bangladesh Acad. Sci. 46(1); 117-128: June 2022
{"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}
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