Pub Date : 2023-06-27DOI: 10.3329/jbas.v47i1.66025
M. Hasan, S. Sultana, M. A. Jahan
To investigate the effect of cow dung and chemical fertilizers on the growth and yield performances of mungbean (BARI Mung 6), an experiment was carried out in the research field of the Sher-e-Bangla Agricultural University, Dhaka, during the kharif season of 2020. The experiment was laid out as a randomized complete block design (RCBD) with three replications comprising seven manure-fertilizer treatments. The results showed that the different levels of cow dung and fertilizers significantly influenced mungbean growth parameters and seed yield. The highest plant height (48.2 cm), number of leaves plant-1 (10.3), number of branches plant-1 (3.9), maximum number of pods plant-1 (19.3), seeds pod-1 (10.4), 1000-seed weight (43.4g), and the highest seed yield (1.42 t ha-1) were obtained from the application of 80% of the recommended dose of fertilizers (RDF) plus 20% cow dung. It is concluded that applying 20% cow dung (1.2 t ha-1) coupled with 80% of the recommended amount of fertilizers together produced superior results for the growth and yield of mungbean compared to applying fertilizer or cow dung alone. J. Bangladesh Acad. Sci. 47(1); 61-68: June 2023
为了研究牛粪和化肥对绿豆(BARI Mung 6)生长和产量性能的影响，于2020年秋收季节在达卡谢尔-e-孟加拉农业大学研究区进行了试验。试验采用随机完全区组设计(RCBD)， 3个重复，共7个粪肥处理。结果表明，不同水平的牛粪和肥料对绿豆生长参数和种子产量有显著影响。在80%推荐用量的肥料(RDF)加20%牛粪的条件下，获得最高株高(48.2 cm)、叶片数(10.3)、分枝数(3.9)、最大荚果数(19.3)、种子荚数(10.4)、千粒重(43.4g)和最高种子产量(1.42 t hm -1)。综上所述，20%牛粪(1.2 t hm -1)配以80%推荐用量的化肥对绿豆生长和产量的影响优于单独施用化肥或牛粪。科学通报，2011 (1);2023年6月
{"title":"The growth and yield performances of mungbean (Vigna radiata L.) as influenced by the use of cow dung and chemical fertilizers","authors":"M. Hasan, S. Sultana, M. A. Jahan","doi":"10.3329/jbas.v47i1.66025","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.66025","url":null,"abstract":"To investigate the effect of cow dung and chemical fertilizers on the growth and yield performances of mungbean (BARI Mung 6), an experiment was carried out in the research field of the Sher-e-Bangla Agricultural University, Dhaka, during the kharif season of 2020. The experiment was laid out as a randomized complete block design (RCBD) with three replications comprising seven manure-fertilizer treatments. The results showed that the different levels of cow dung and fertilizers significantly influenced mungbean growth parameters and seed yield. The highest plant height (48.2 cm), number of leaves plant-1 (10.3), number of branches plant-1 (3.9), maximum number of pods plant-1 (19.3), seeds pod-1 (10.4), 1000-seed weight (43.4g), and the highest seed yield (1.42 t ha-1) were obtained from the application of 80% of the recommended dose of fertilizers (RDF) plus 20% cow dung. It is concluded that applying 20% cow dung (1.2 t ha-1) coupled with 80% of the recommended amount of fertilizers together produced superior results for the growth and yield of mungbean compared to applying fertilizer or cow dung alone.\u0000J. Bangladesh Acad. Sci. 47(1); 61-68: June 2023","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82962060","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.66442
M. T. R. Joy, Jagodish C. Sarker, S. Kabir
This article provides an overview of the rich chemistry of rhenium and manganese decacarbonyls, M2(CO)10 (M = Re, Mn) and their acetonitrile derivatives [M2(CO)8(NCMe)2] as precursors for synthesis of new di‒, tri‒ and tetranuclear complexes derived from a wide range of heterocyclic thiols such as pyridine-2-thiol, pyrimidine-2-thiol, tetrahydropyrimidine-2-thiol, 2-mercapto-1-methylimidazole, benzimidazole-2-thiol etc. A comparative study of the reactivities of these complexes with various mono and bidentate ligands is also the subject of this review. In some instances, the structural aspects of the complexes are also discussed. The applications of these complexes as precursors for the synthesis of a wide variety of mixed-metal cluster complexes are highlighted. J. Bangladesh Acad. Sci. 47(1); 1-21: June 2023
本文综述了铼和锰十羰基、M2(CO)10 (M = Re, Mn)及其乙腈衍生物[M2(CO)8(NCMe)2]作为前体，以吡啶-2-硫醇、嘧啶-2-硫醇、四氢嘧啶-2-硫醇、2-巯基-1-甲基咪唑、苯并咪唑-2-硫醇等多种杂环硫醇为原料合成新的二核、三核和四核配合物的丰富化学性质。这些配合物与各种单齿和双齿配体的反应性的比较研究也是本综述的主题。在某些情况下，还讨论了配合物的结构方面。重点介绍了这些配合物作为合成各种混合金属团簇配合物的前驱体的应用。科学通报，2011 (1);1-21: 2023年6月
{"title":"The chemistry of rhenium and manganese carbonyl complexes bearing heterocyclic thiolate ligands: Mono‒, di‒, tri‒, and tetranuclear complexes","authors":"M. T. R. Joy, Jagodish C. Sarker, S. Kabir","doi":"10.3329/jbas.v47i1.66442","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.66442","url":null,"abstract":"This article provides an overview of the rich chemistry of rhenium and manganese decacarbonyls, M2(CO)10 (M = Re, Mn) and their acetonitrile derivatives [M2(CO)8(NCMe)2] as precursors for synthesis of new di‒, tri‒ and tetranuclear complexes derived from a wide range of heterocyclic thiols such as pyridine-2-thiol, pyrimidine-2-thiol, tetrahydropyrimidine-2-thiol, 2-mercapto-1-methylimidazole, benzimidazole-2-thiol etc. A comparative study of the reactivities of these complexes with various mono and bidentate ligands is also the subject of this review. In some instances, the structural aspects of the complexes are also discussed. The applications of these complexes as precursors for the synthesis of a wide variety of mixed-metal cluster complexes are highlighted.\u0000J. Bangladesh Acad. Sci. 47(1); 1-21: June 2023","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77072849","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.64895
M. Mondal, Md Azadul Haque, M. Islam
The experiment was conducted during February to May, 2019 at the research farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202. The objective of the study was to evaluate the growth, reproductive characteristics, yield and yield components of four similar durated mungbean genotypes, namely BARI Mung-2, Binamoog-2, MB-29, and MB-43. At most of the growth stages, the mutant MB-29 showed superiority in terms of growth parameters such as total dry matter, leaf area index, absolute growth rate, relative growth rate, and net assimilation rate whilst MB-43 showed the inferiority. Furthermore, MB-29 outperformed the other three genotypes in yield attributing features, resulting in a higher seed yield than the other three genotypes. In comparison, the MB-43 mutant showed the lowest value for the yield parameters. The seed yield correlated positively and significantly with leaf area, total dry matter, absolute growth rate, and number of pods plant-1. J. Bangladesh Acad. Sci. 47(1); 101-108: June 2023
{"title":"Physiological causes of yield variation in similar durated mungbean genotypes","authors":"M. Mondal, Md Azadul Haque, M. Islam","doi":"10.3329/jbas.v47i1.64895","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.64895","url":null,"abstract":"The experiment was conducted during February to May, 2019 at the research farm of Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202. The objective of the study was to evaluate the growth, reproductive characteristics, yield and yield components of four similar durated mungbean genotypes, namely BARI Mung-2, Binamoog-2, MB-29, and MB-43. At most of the growth stages, the mutant MB-29 showed superiority in terms of growth parameters such as total dry matter, leaf area index, absolute growth rate, relative growth rate, and net assimilation rate whilst MB-43 showed the inferiority. Furthermore, MB-29 outperformed the other three genotypes in yield attributing features, resulting in a higher seed yield than the other three genotypes. In comparison, the MB-43 mutant showed the lowest value for the yield parameters. The seed yield correlated positively and significantly with leaf area, total dry matter, absolute growth rate, and number of pods plant-1.\u0000J. Bangladesh Acad. Sci. 47(1); 101-108: June 2023 ","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81968351","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}
This study examined the intensification of mono-sex Nile tilapia Oreochromis niloticusaquaculturein riverine net cages installed at the River Dakatia, Roghunathpur, Chandpur. This study performed 120-day cage grow-out trials with densities of 50, 75, and 100 tilapia m-3 under three replications with an average initial weight of 28.92±8.37g per juvenile fish. The monthly water quality parameters (temperature, pH, dissolved oxygen, total alkalinity and hardness, ammonia-N and Nitrite-N) in the cage installation water area of the River Dakatia were found to be suitable for tilapia cage culture. The monthly average weight gain was significantly (p < 0.05) higher in 50 tilapia m-3 stocking density than in the other two stocking densities tested. The mean final weight and specific growth rate were significantly (p < 0.05) higher in 50 tilapia m-3 stocking densitythan the other two stocking densities. Significantly (p < 0.05) higher survival (97.92%) was found in the 50 tilapia m-3 stocking density group and followed by 86.74% and 84.39% in the 75 and 100 tilapia m-3 stocking densities, respectively. Consequently, the monthly relative and specific growth rate and feed conversion ratio were significantly (p < 0.05) higher in 50 tilapia m-3 stocking density fishes for the first, third, and fourth months. Gross production was comparable between 50 and 75 tilapia m-3 stocking densities but was significantly (p < 0.05) better than 100 m-3 stocking density. Net production was significantly (p < 0.05) higher at 50 tilapia m-3 stocking density group than those of 75 and 100 tilapia m-3 stocking densities. The best feed conversion ratio (1.60) was in the 50 tilapia m-3 stocking density group (p < 0.05) than those of 1.87 and 2.44 for the stocking of 75 and 100 tilapia m-3, respectively. Benefit-cost ratio and net profit were significantly (p < 0.05) better at 50 and 75 tilapia m-3 than at 100 tilapia m-3 stocking density. Therefore, considering maximum outputs, benefits, and performances, we recommend stocking density at 50 mono-sex tilapia m-3 for the best growth, cost-effective production, and highest-economic return from 120 days of grow-out net cages in the riverine culture system. J. Bangladesh Acad. Sci. 47(1); 43-52: June 2023
{"title":"Commercial Nile tilapia Oreochromis niloticus production in net cages at the River Dakatia, Chandpur, Bangladesh","authors":"Md. R. Hossain, Md. Eilious Hosain, Anika Tabassum, Md. Niamul Naser","doi":"10.3329/jbas.v47i1.66683","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.66683","url":null,"abstract":"This study examined the intensification of mono-sex Nile tilapia Oreochromis niloticusaquaculturein riverine net cages installed at the River Dakatia, Roghunathpur, Chandpur. This study performed 120-day cage grow-out trials with densities of 50, 75, and 100 tilapia m-3 under three replications with an average initial weight of 28.92±8.37g per juvenile fish. The monthly water quality parameters (temperature, pH, dissolved oxygen, total alkalinity and hardness, ammonia-N and Nitrite-N) in the cage installation water area of the River Dakatia were found to be suitable for tilapia cage culture. The monthly average weight gain was significantly (p < 0.05) higher in 50 tilapia m-3 stocking density than in the other two stocking densities tested. The mean final weight and specific growth rate were significantly (p < 0.05) higher in 50 tilapia m-3 stocking densitythan the other two stocking densities. Significantly (p < 0.05) higher survival (97.92%) was found in the 50 tilapia m-3 stocking density group and followed by 86.74% and 84.39% in the 75 and 100 tilapia m-3 stocking densities, respectively. Consequently, the monthly relative and specific growth rate and feed conversion ratio were significantly (p < 0.05) higher in 50 tilapia m-3 stocking density fishes for the first, third, and fourth months. Gross production was comparable between 50 and 75 tilapia m-3 stocking densities but was significantly (p < 0.05) better than 100 m-3 stocking density. Net production was significantly (p < 0.05) higher at 50 tilapia m-3 stocking density group than those of 75 and 100 tilapia m-3 stocking densities. The best feed conversion ratio (1.60) was in the 50 tilapia m-3 stocking density group (p < 0.05) than those of 1.87 and 2.44 for the stocking of 75 and 100 tilapia m-3, respectively. Benefit-cost ratio and net profit were significantly (p < 0.05) better at 50 and 75 tilapia m-3 than at 100 tilapia m-3 stocking density. Therefore, considering maximum outputs, benefits, and performances, we recommend stocking density at 50 mono-sex tilapia m-3 for the best growth, cost-effective production, and highest-economic return from 120 days of grow-out net cages in the riverine culture system.\u0000J. Bangladesh Acad. Sci. 47(1); 43-52: June 2023","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83404651","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.65576
S. F. Khan, Fahmida Sultana Rima, F. Hassan
Circadian rhythm is a natural physiological process that regulates the sleep-wake cycle and occurs about every 24 hours. The fundamental molecular clock, NPAS2 (Neuronal PAS Domain Protein 2), generates and regulates mammalian circadian rhythms. Various diseases have been linked to single nucleotide polymorphisms (SNPs) in NPAS2. In this study, several computational approaches have been employed to predict the SNPs' functional and structural consequences and investigate the deleterious roles of nsSNPs. Two deleterious nsSNPs (F190L and S105I) were found with predicted functions linking to disease. Alongside, from the obtained ConSurf result, Q73, E61, K51, E167, L317, and R514 were expected as highly conserved and exposed, while T114, T328, and C299 were predicted as highly conserved and buried. However, to establish their role in disease pathogenesis, further studies need to be done on the deleterious mutations of the NPAS2 gene. J. Bangladesh Acad. Sci. 47(1); 53-60: June 2023
{"title":"Computational analysis of functional single nucleotide polymorphisms associated with NPAS2 gene","authors":"S. F. Khan, Fahmida Sultana Rima, F. Hassan","doi":"10.3329/jbas.v47i1.65576","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.65576","url":null,"abstract":"Circadian rhythm is a natural physiological process that regulates the sleep-wake cycle and occurs about every 24 hours. The fundamental molecular clock, NPAS2 (Neuronal PAS Domain Protein 2), generates and regulates mammalian circadian rhythms. Various diseases have been linked to single nucleotide polymorphisms (SNPs) in NPAS2. In this study, several computational approaches have been employed to predict the SNPs' functional and structural consequences and investigate the deleterious roles of nsSNPs. Two deleterious nsSNPs (F190L and S105I) were found with predicted functions linking to disease. Alongside, from the obtained ConSurf result, Q73, E61, K51, E167, L317, and R514 were expected as highly conserved and exposed, while T114, T328, and C299 were predicted as highly conserved and buried. However, to establish their role in disease pathogenesis, further studies need to be done on the deleterious mutations of the NPAS2 gene.\u0000J. Bangladesh Acad. Sci. 47(1); 53-60: June 2023","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78201460","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.63349
Mousumi Akter, K. Fatema, S. Hossain
Fuzzy soft set theory is becoming more and more important for coming up with coherent and logical answers to numerous real-world issues that are riddled with uncertainty, imprecision, and vagueness. The intuitionistic fuzzy soft set was investigated theoretically later on. Wherever uncertainty resulting from ambiguity manifests in more sophisticated ways, the combination of intuitionistic fuzzy set and intuitionistic fuzzy soft set is more efficient from an implementational standpoint. In this paper, the motivation of our work is to establish a new methodology to select an object from an inexact multiobserver data with the idea of intuitionistic fuzzy soft set theory. Our methodology includes an algorithm based on “and”, “or” operation, max, min comparison data and comparison table. J. Bangladesh Acad. Sci. 47(1); 109-117: June 2023
{"title":"Implementation of intuitionistic fuzzy soft set theoretic scheme in decision making","authors":"Mousumi Akter, K. Fatema, S. Hossain","doi":"10.3329/jbas.v47i1.63349","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.63349","url":null,"abstract":"Fuzzy soft set theory is becoming more and more important for coming up with coherent and logical answers to numerous real-world issues that are riddled with uncertainty, imprecision, and vagueness. The intuitionistic fuzzy soft set was investigated theoretically later on. Wherever uncertainty resulting from ambiguity manifests in more sophisticated ways, the combination of intuitionistic fuzzy set and intuitionistic fuzzy soft set is more efficient from an implementational standpoint. In this paper, the motivation of our work is to establish a new methodology to select an object from an inexact multiobserver data with the idea of intuitionistic fuzzy soft set theory. Our methodology includes an algorithm based on “and”, “or” operation, max, min comparison data and comparison table.\u0000J. Bangladesh Acad. Sci. 47(1); 109-117: June 2023 ","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87395797","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.63983
Saika Mahjabin, M. A. Alim
This paper presents a study on the influence of Magnetic Force impressed upon MHD fluid contained in a square cavity with a heated cone. The novelty of this work includes a heated cone whose orientation is varied at different angles. Calculations are performed for Prandtl number Pr = 0.71; Rayleigh number Ra = 10, 1000, and 100000; and Hartmann number Ha = 0, 50, and 100. The results are illustrated with streamlines, isotherms, and other relevant plots. It is observed that the influence of Ha becomes more noticeable with increasing Ra. Ha affects the flow by retarding the fluid movement and thus affects convective heat transfer. It is also observed that the cone orientation influences both fluid circulation and heat transfer. At high Ra, the vertical orientation of the cone resulted in lower heat flux than the left/right orientations. Also, under the same condition, the system remains cooler with the vertical cone at lower Ha, but becomes hotter after a certain value of Ha. These findings have practical design implications. J. Bangladesh Acad. Sci. 47(1); 127-137: June 2023
{"title":"MHD convection in a square cavity with a heated cone: Effects of magnetic field and cone orientation","authors":"Saika Mahjabin, M. A. Alim","doi":"10.3329/jbas.v47i1.63983","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.63983","url":null,"abstract":"This paper presents a study on the influence of Magnetic Force impressed upon MHD fluid contained in a square cavity with a heated cone. The novelty of this work includes a heated cone whose orientation is varied at different angles. Calculations are performed for Prandtl number Pr = 0.71; Rayleigh number Ra = 10, 1000, and 100000; and Hartmann number Ha = 0, 50, and 100. The results are illustrated with streamlines, isotherms, and other relevant plots. It is observed that the influence of Ha becomes more noticeable with increasing Ra. Ha affects the flow by retarding the fluid movement and thus affects convective heat transfer. It is also observed that the cone orientation influences both fluid circulation and heat transfer. At high Ra, the vertical orientation of the cone resulted in lower heat flux than the left/right orientations. Also, under the same condition, the system remains cooler with the vertical cone at lower Ha, but becomes hotter after a certain value of Ha. These findings have practical design implications.\u0000J. Bangladesh Acad. Sci. 47(1); 127-137: June 2023 ","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85961931","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 : 2023-06-27DOI: 10.3329/jbas.v47i1.65129
M. Beg, Sumaiya Binte Hannan, -. Rabeya, S. Talukder, A. Uddin, Shammi Akter, R. N. Reza, Haseena Khan, M. R. Islam
Jute (Corchorus olitorius) endophytic fungi Grammothele lineata SDL-CO-2015-1 was found to produce epothilone B, a well-reported anticancer compound. Both the genome and RNA-seq data of G. lineata revealed the presence of epothilone gene clusters. In silico mining using NaPDoS (Natural Product Domain Seeker) identified four genes matching with the epothilone gene cluster (Epo D). Epothilone was extracted from the extracellular extract of this fungus using XAD-16 resin. Different analytical techniques including thin layer chromatography (TLC), reverse phase high-performance liquid chromatography (RP-HPLC), and mass spectrometry (MS) were used to identify and characterize epothilone following its extraction. TLC bands were visible at 365 nm for both standard epothilone B and samples with identical Rf values. Extracted epothilone bands from the TLC plate were further purified using RP-HPLC. Using a linear gradient system with methanol and 0.1% formic acid, LC-MS spectroscopy was done with RP-HPLC purified fraction. The monoisotopic mass of epothilone (M+H+) = 508.1 Da was present in the mass chromatogram. The product ions of 508.1 Da were found with the m/z values at 320.2 Da, and 420.2 Da, the typical MS2 fragments for standard epothilone B. This finding suggests that the fungal endophyte, G. lineata can be a potential source of epothilone B. J. Bangladesh Acad. Sci. 47(1); 91-99: June 2023
{"title":"Jute endophyte Grammothele lineata SDL-CO-2015-1 produces an anticancer compound epothilone B","authors":"M. Beg, Sumaiya Binte Hannan, -. Rabeya, S. Talukder, A. Uddin, Shammi Akter, R. N. Reza, Haseena Khan, M. R. Islam","doi":"10.3329/jbas.v47i1.65129","DOIUrl":"https://doi.org/10.3329/jbas.v47i1.65129","url":null,"abstract":"Jute (Corchorus olitorius) endophytic fungi Grammothele lineata SDL-CO-2015-1 was found to produce epothilone B, a well-reported anticancer compound. Both the genome and RNA-seq data of G. lineata revealed the presence of epothilone gene clusters. In silico mining using NaPDoS (Natural Product Domain Seeker) identified four genes matching with the epothilone gene cluster (Epo D). Epothilone was extracted from the extracellular extract of this fungus using XAD-16 resin. Different analytical techniques including thin layer chromatography (TLC), reverse phase high-performance liquid chromatography (RP-HPLC), and mass spectrometry (MS) were used to identify and characterize epothilone following its extraction. TLC bands were visible at 365 nm for both standard epothilone B and samples with identical Rf values. Extracted epothilone bands from the TLC plate were further purified using RP-HPLC. Using a linear gradient system with methanol and 0.1% formic acid, LC-MS spectroscopy was done with RP-HPLC purified fraction. The monoisotopic mass of epothilone (M+H+) = 508.1 Da was present in the mass chromatogram. The product ions of 508.1 Da were found with the m/z values at 320.2 Da, and 420.2 Da, the typical MS2 fragments for standard epothilone B. This finding suggests that the fungal endophyte, G. lineata can be a potential source of epothilone B.\u0000J. Bangladesh Acad. Sci. 47(1); 91-99: June 2023","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85413916","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 : 2022-12-31DOI: 10.3329/jbas.v46i2.60172
M. Islam, Md. Tarek Hossain, A. Hannan
In the present work, we investigate how pressure affects the valence change of cerium in cerium-based compounds CeX (X= O, S, Te, P, As, Sb, and Bi). The valence of cerium at a certain high pressure is estimated by comparing the experimentally observed unit cell volume and the calculated unit cell volume of stable trivalent cerium ion in the compound. The change in unit cell volume with pressure is estimated by employing the Birch equation of state. It is found that the valence of Ce in the CeX is significantly influenced by both the applied pressure as well as the chemical environment around the Ce ion. J. Bangladesh Acad. Sci. 46(2); 147-154: December 2022
在目前的工作中，我们研究了压力如何影响铈基化合物CeX (X= O, S, Te, P, As, Sb和Bi)中铈的价态变化。通过比较实验观察到的化合物中稳定三价铈离子的单位电池体积和计算得到的单位电池体积，估计了一定高压下铈的价态。利用伯奇状态方程估计了单元胞体积随压力的变化。结果表明，CeX中Ce的价态受外加压力和Ce周围的化学环境的显著影响。科学通报46(2);147-154: 2022年12月
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Pub Date : 2022-12-31DOI: 10.3329/jbas.v46i2.63622
F. Aktar, Md. Jamal Hossain, Md. Zakir Sultan, M. Rashid
Gemifloxacin mesylate is a synthetic fluoroquinolone derived antimicrobial agent. Two metal complexes of gemifloxacin mesylate were synthesized viz. gemifloxacin-Fe and gemifloxacin-Zn. The formed complexes were characterized by using TLC, TGA and FT-IR spectra analyses. The formed complexes were then evaluated for antimicrobial activity. The newly formed two complexes were assessed against nine bacterial and one fungal strain, where gemifloxacin (30 µg/disc) was used as a reference standard. The new complexes showed better activity than the standard reference drug against Klebsiella pneumoniae among nine bacterial strains. But two bacterial species, Acinetobacter lwoffii and Enterococcus faecium, and the fungal strain Candida albicans showed complete resistance to the newly synthesized complexes and the reference standard. The drug protein interaction with the Bovine Serum Albumin (BSA) was also studied. The interaction mechanism was explored, suggesting that gemifloxacin and its Zn (II) complex interact with BSA via a static process while the Fe (II) complex interacts via a dynamic process and the lower Ksv value also indicated that drug -BSA complexes were formed in ground-state. J. Bangladesh Acad. Sci. 46(2); 203-211: December 2022
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