Pub Date : 2024-06-15DOI: 10.3329/jbas.v48i1.69554
Mohammad Quamruzzaman Babu, Akash Mojumdar, Prosenjit Debbarma, Khurshed Alom, Md Ashraf Ul Hasan
Our study focuses on the butterfly checklist of the Adampur forest beat, located in the Rajkandi Reserve Forest of Moulvibazar, Bangladesh. The study was conducted between December 2014 and January 2018 and aimed to document butterfly species in the area. A total of 266 butterfly species belong to 149 genera and 6 families (Papilionidae, Pieridae, Nymphalidae, Lycaenidae, Hesperiidae, and Riodinidae) were recorded. The Lycaenidae family exhibited the highest species richness, comprising 33.08% (n = 88) of the recorded species, while the Riodinidae family was the least prevalent, representing 0.38% (n = 1) of the species. In this study, the butterfly species recorded revealed varying conservation status according to the International Union for Conservation of Nature Bangladesh assessment, with 26.69% listed as Endangered, 30.08% Least Concern, 23.68% Vulnerable, 1.50% Data Deficient, and 18.05% Not Evaluated. These findings offer crucial insights for future butterfly research and conservation in the Adampur forest beat. J. Bangladesh Acad. Sci. 48(1); 85-97: June 2024
{"title":"Unveiling the unknown: a butterfly checklist of the Adampur forest in Bangladesh","authors":"Mohammad Quamruzzaman Babu, Akash Mojumdar, Prosenjit Debbarma, Khurshed Alom, Md Ashraf Ul Hasan","doi":"10.3329/jbas.v48i1.69554","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.69554","url":null,"abstract":"Our study focuses on the butterfly checklist of the Adampur forest beat, located in the Rajkandi Reserve Forest of Moulvibazar, Bangladesh. The study was conducted between December 2014 and January 2018 and aimed to document butterfly species in the area. A total of 266 butterfly species belong to 149 genera and 6 families (Papilionidae, Pieridae, Nymphalidae, Lycaenidae, Hesperiidae, and Riodinidae) were recorded. The Lycaenidae family exhibited the highest species richness, comprising 33.08% (n = 88) of the recorded species, while the Riodinidae family was the least prevalent, representing 0.38% (n = 1) of the species. In this study, the butterfly species recorded revealed varying conservation status according to the International Union for Conservation of Nature Bangladesh assessment, with 26.69% listed as Endangered, 30.08% Least Concern, 23.68% Vulnerable, 1.50% Data Deficient, and 18.05% Not Evaluated. These findings offer crucial insights for future butterfly research and conservation in the Adampur forest beat.\u0000J. Bangladesh Acad. Sci. 48(1); 85-97: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"28 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141335951","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.68849
R. C. Bhowmik, Md Sahadat Hossain
In this paper, we aim to investigate separation axioms in intuitionistic topological spaces. After presenting some characterizations of separation axioms, we provide interrelationships among those and their non-implications in counterexamples. Furthermore, we show that our notions satisfy hereditary and topological properties. Moreover, we establish that some of these notions satisfy productive and projective properties. 2000 Mathematics Subject Classification. 54A99. J. Bangladesh Acad. Sci. 48(1); 35-43: June 2024
{"title":"T_0 Separation Axioms in Intuitionistic Topological Spaces","authors":"R. C. Bhowmik, Md Sahadat Hossain","doi":"10.3329/jbas.v48i1.68849","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.68849","url":null,"abstract":"In this paper, we aim to investigate separation axioms in intuitionistic topological spaces. After presenting some characterizations of separation axioms, we provide interrelationships among those and their non-implications in counterexamples. Furthermore, we show that our notions satisfy hereditary and topological properties. Moreover, we establish that some of these notions satisfy productive and projective properties. 2000 Mathematics Subject Classification. 54A99.\u0000J. Bangladesh Acad. Sci. 48(1); 35-43: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"8 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336885","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.69329
Shahjahan Miah Saikh, Homayra Kabir
In this document paper, we offer the concepts of some notions of Hausdorff (T2 ) property in intuitionistic fuzzy bitopological spaces. We demonstrate that each of them notion satisfies good extension property. We also establish that these notions satisfy hereditary properties. We observe that all the concepts of intuitionistic fuzzy Hausdorff bitopological spaces are preserved under one-one, onto, fuzzy mappings. J. Bangladesh Acad. Sci. 48(1); 51-59: June 2024
在本文中，我们提出了直觉模糊位ological空间中豪斯多夫（T2）性质的一些概念。我们证明了其中每个概念都满足良好扩展属性。我们还确定了这些概念满足遗传属性。我们观察到，直觉模糊 Hausdorff 位ological 空间的所有概念在一一对应的模糊映射下都得到了保留。48(1); 51-59: June 2024
{"title":"Study on intutionistic fuzzy Hausdorff ( T2) bitopological spaces: theoretical insights","authors":"Shahjahan Miah Saikh, Homayra Kabir","doi":"10.3329/jbas.v48i1.69329","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.69329","url":null,"abstract":"In this document paper, we offer the concepts of some notions of Hausdorff (T2 ) property in intuitionistic fuzzy bitopological spaces. We demonstrate that each of them notion satisfies good extension property. We also establish that these notions satisfy hereditary properties. We observe that all the concepts of intuitionistic fuzzy Hausdorff bitopological spaces are preserved under one-one, onto, fuzzy mappings.\u0000J. Bangladesh Acad. Sci. 48(1); 51-59: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"80 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338147","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.68504
Ashma Ahmed Warasy
Two medicinal plants, O. corniculata and O. triangularis, were investigated cytogenetically for proper characterization. Both plants had Complex Chromocenter interphase nuclei and Continuous prophase chromosomes. O. corniculata was discovered to have 2n=48 chromosomes and 2n=30 in O. triangularis. The chromosomal length range was 0.82±0.02-1.61±0.02 in O. corniculata and 1.02±0.02- 2.52±0.03 in O. triangularis. The total length of the 2n chromosome complement was 53.52±1.19 and 46.76±0.41 for O. corniculate and O. triangular, respectively. The two species differed in centromeric formulas, such as 48m for O. corniculata and 28m+2sm for O. triangularis. In their karyotype, no steady decrease in chromosomal length was seen. These characteristics showed that O. corniculata and O. triangularis could be considered primitive species. Therefore, compiling the cytogenetic features will be helpful to ensure the genuine identification and characterization of the two medicinally important Oxalis species. J. Bangladesh Acad. Sci. 48(1); 135-140: June 2024
对两种药用植物--O. corniculata 和 O. triangularis--进行了细胞遗传学研究，以确定其特征。这两种植物都有复杂的染色体中心间期核和连续的前期染色体。发现 O. corniculata 有 2n=48 条染色体，O. triangularis 有 2n=30 条染色体。O.corniculata的染色体长度范围为0.82±0.02-1.61±0.02，O.triangularis的染色体长度范围为1.02±0.02- 2.52±0.03。角斑鱼和三角鱼的 2n 染色体互补体总长度分别为（53.52±1.19）和（46.76±0.41）。两个物种的中心粒公式存在差异，如鸡冠花 O. 为 48m，三角帆 O. 为 28m+2sm。在它们的核型中，染色体长度没有出现稳定的下降。这些特征表明，O. corniculata 和 O. triangularis 可被视为原始种。因此，汇编细胞遗传学特征将有助于确保对这两种具有重要药用价值的 Oxalis 物种进行真正的鉴定和特征描述。48(1); 135-140：2024 年 6 月
{"title":"Chromosomal characterization of two medicinal plants from Bangladesh","authors":"Ashma Ahmed Warasy","doi":"10.3329/jbas.v48i1.68504","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.68504","url":null,"abstract":"Two medicinal plants, O. corniculata and O. triangularis, were investigated cytogenetically for proper characterization. Both plants had Complex Chromocenter interphase nuclei and Continuous prophase chromosomes. O. corniculata was discovered to have 2n=48 chromosomes and 2n=30 in O. triangularis. The chromosomal length range was 0.82±0.02-1.61±0.02 in O. corniculata and 1.02±0.02- 2.52±0.03 in O. triangularis. The total length of the 2n chromosome complement was 53.52±1.19 and 46.76±0.41 for O. corniculate and O. triangular, respectively. The two species differed in centromeric formulas, such as 48m for O. corniculata and 28m+2sm for O. triangularis. In their karyotype, no steady decrease in chromosomal length was seen. These characteristics showed that O. corniculata and O. triangularis could be considered primitive species. Therefore, compiling the cytogenetic features will be helpful to ensure the genuine identification and characterization of the two medicinally important Oxalis species.\u0000J. Bangladesh Acad. Sci. 48(1); 135-140: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"82 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141337838","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.70241
Mohammed Mahmudur Rahman, Moni Akter, Abu Bakar Siddik, Md Waliul Islam, Sadia Afrin, M. Afroze, Mala Khan, Md Azizul Hoque, Md Al Mamun
The purification of waste engine oil was conducted utilizing locally available clay in three different forms: raw, acid-treated, and a mixture of clay with activated charcoal. A 72.6% and 70.12% purification efficiency has been achieved when employing raw and acid-treated clay, respectively. However, the purification yield decreased to 64.35% when utilizing a combination of acid-treated clay and activated charcoal. FTIR analysis confirmed the presence of alkanes and alkenes in the purified oil. The NMR and GC-MS analysis identified the presence of linear and branched alkanes and alkenes, as well as substituted-benzene compounds in the purified oil. The density of waste engine oil and the corresponding purified oil was determined to be 0.929 g/mL and 0.825 g/mL, respectively. After purification, the kinematic viscosity decreased from 192 mm2/sec to 70 mm2/sec at 40 °C. The AAS analysis revealed the presence of 13.28 mg/L of lead (Pb) and 91.56 mg/L of chromium (Cr) in the waste engine oil, which significantly decreased to 0.02 mg/L and 0.037 mg/L, respectively, after purification with clay mixed with activated charcoal. J. Bangladesh Acad. Sci. 48(1); 121-134: June 2024
{"title":"Purification of waste engine oil using raw clay, acid treated clay and clay/activated charcoal","authors":"Mohammed Mahmudur Rahman, Moni Akter, Abu Bakar Siddik, Md Waliul Islam, Sadia Afrin, M. Afroze, Mala Khan, Md Azizul Hoque, Md Al Mamun","doi":"10.3329/jbas.v48i1.70241","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.70241","url":null,"abstract":"The purification of waste engine oil was conducted utilizing locally available clay in three different forms: raw, acid-treated, and a mixture of clay with activated charcoal. A 72.6% and 70.12% purification efficiency has been achieved when employing raw and acid-treated clay, respectively. However, the purification yield decreased to 64.35% when utilizing a combination of acid-treated clay and activated charcoal. FTIR analysis confirmed the presence of alkanes and alkenes in the purified oil. The NMR and GC-MS analysis identified the presence of linear and branched alkanes and alkenes, as well as substituted-benzene compounds in the purified oil. The density of waste engine oil and the corresponding purified oil was determined to be 0.929 g/mL and 0.825 g/mL, respectively. After purification, the kinematic viscosity decreased from 192 mm2/sec to 70 mm2/sec at 40 °C. The AAS analysis revealed the presence of 13.28 mg/L of lead (Pb) and 91.56 mg/L of chromium (Cr) in the waste engine oil, which significantly decreased to 0.02 mg/L and 0.037 mg/L, respectively, after purification with clay mixed with activated charcoal.\u0000J. Bangladesh Acad. Sci. 48(1); 121-134: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"77 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141337861","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.69481
N. Khansur, Iqbal Mahmud, A. Samed, Md. Nizam Uddin, M. Kalam, M. A. B. H. Susan
The cyclic voltammetric method was employed to study the electrochemical behavior of aqueous crystal violet in the presence of cetyltrimethylammonium bromide, both below and above the critical micelle concentration. The cyclic voltammograms were highly sensitive to solution pH exhibiting well-defined oxidation and reduction peaks within the pH range of 1.76 to 2.29. The electrochemical potentials and currents indicate the involvement of a set of reactions responsible for the observed voltammograms. The diquinoid of N, N, N’, N’- tetramethylbenzidine was formed, which was reduced to N, N, N’, N’- tetramethylbenzidine. The presence of CTAB profoundly influenced the electrochemical behavior, and responses were found to depend on the dissolved states of CTAB. The electrochemical process was diffusion-controlled and followed a chemical-electrochemical-chemical (CEC) mechanism. J. Bangladesh Acad. Sci. 48(1); 75-83: June 2024
{"title":"Cyclic voltammetric behavior of crystal violet in aqueous solution: Correlation with dissolved states of cetyltrimethylammonium bromide","authors":"N. Khansur, Iqbal Mahmud, A. Samed, Md. Nizam Uddin, M. Kalam, M. A. B. H. Susan","doi":"10.3329/jbas.v48i1.69481","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.69481","url":null,"abstract":"The cyclic voltammetric method was employed to study the electrochemical behavior of aqueous crystal violet in the presence of cetyltrimethylammonium bromide, both below and above the critical micelle concentration. The cyclic voltammograms were highly sensitive to solution pH exhibiting well-defined oxidation and reduction peaks within the pH range of 1.76 to 2.29. The electrochemical potentials and currents indicate the involvement of a set of reactions responsible for the observed voltammograms. The diquinoid of N, N, N’, N’- tetramethylbenzidine was formed, which was reduced to N, N, N’, N’- tetramethylbenzidine. The presence of CTAB profoundly influenced the electrochemical behavior, and responses were found to depend on the dissolved states of CTAB. The electrochemical process was diffusion-controlled and followed a chemical-electrochemical-chemical (CEC) mechanism.\u0000J. Bangladesh Acad. Sci. 48(1); 75-83: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"1 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336910","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.69379
Mohammad Zakerin Abedin, Laila Jarin, Md. Easin Arfat, Md. Sadiqur Rahman, R. Shilpi
Fish and fish products can support 40% of world diets, which meets 60% of the animal protein requisites in Bangladesh. Infections of fishes, along with the continuously elevated emergence of microbial resistance, are the major drawbacks to the massive milestone forward. This investigation aimed to reveal the antimicrobial resistance patterns of the pathogens associated with diverse fish infections. According to Bergey's manual of bacteriological classification, isolated pathogens were provisionally identified at genera levels based on their cultural, morphological, and biochemical characteristics. The Kirby-Bauer (Cockerill and CLSI, 2013) disc diffusion method was exploited to determine the antimicrobial resistance. Pathogenic growths were found in 150 (83.34%) out of 180 samples by Aeromonas spp. (39.33%), Vibrio spp. (16.67%), Flavobacter spp. (14.67%), Edwardsiell spp (12.67%), Pseudomonas spp. (9.33%), Streptococcus spp. (5.55%), and Citrobacter spp. (2%) in Shing (Heteropneustes spp.), Pangus (Pangasius spp.), Pabda (Ompok spp.), Gulsha (Mystus cavasius), Tilapia (Oreochromis niloticus), Koi (Cyprinus spp.), Magur (Clarias batrachus), and Tengra (Mystus tengara). Pathogens showed resistance against Amoxicillin (136/150; 90.67%), Chlortetracycline (135/150; 90%), and Erythromycin (134/150; 89.33%), whereas Levofloxacin (138/150; 92%), Ciprofloxacin (123/150; 82%), Neomycin (120/150; 80%), and Colistin (117/150; 78%), exhibited potential effectiveness. A huge frequency of 60% (90 out of 150) of pathogens exhibited as high as 21 antimicrobial resistance patterns towards a minimum of 4 antibiotics and a maximum of 8 antibiotics, whereas Aeromonas spp. isolates were the most prominent. The investigation would provide substantial guidance to veterinarians and animal husbandmen involved in fish cultivation to design therapeutics against infections. Regular and vigorous investigation and implementation of the acquired knowledge would be the only possible solution to halt the rapid increase of antimicrobial resistance. J. Bangladesh Acad. Sci. 48(1); 61-74: June 2024
{"title":"Bacterial profiles and multi-drug resistance patterns in bacterial isolates associated with freshwater fish infections","authors":"Mohammad Zakerin Abedin, Laila Jarin, Md. Easin Arfat, Md. Sadiqur Rahman, R. Shilpi","doi":"10.3329/jbas.v48i1.69379","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.69379","url":null,"abstract":"Fish and fish products can support 40% of world diets, which meets 60% of the animal protein requisites in Bangladesh. Infections of fishes, along with the continuously elevated emergence of microbial resistance, are the major drawbacks to the massive milestone forward. This investigation aimed to reveal the antimicrobial resistance patterns of the pathogens associated with diverse fish infections. According to Bergey's manual of bacteriological classification, isolated pathogens were provisionally identified at genera levels based on their cultural, morphological, and biochemical characteristics. The Kirby-Bauer (Cockerill and CLSI, 2013) disc diffusion method was exploited to determine the antimicrobial resistance. Pathogenic growths were found in 150 (83.34%) out of 180 samples by Aeromonas spp. (39.33%), Vibrio spp. (16.67%), Flavobacter spp. (14.67%), Edwardsiell spp (12.67%), Pseudomonas spp. (9.33%), Streptococcus spp. (5.55%), and Citrobacter spp. (2%) in Shing (Heteropneustes spp.), Pangus (Pangasius spp.), Pabda (Ompok spp.), Gulsha (Mystus cavasius), Tilapia (Oreochromis niloticus), Koi (Cyprinus spp.), Magur (Clarias batrachus), and Tengra (Mystus tengara). Pathogens showed resistance against Amoxicillin (136/150; 90.67%), Chlortetracycline (135/150; 90%), and Erythromycin (134/150; 89.33%), whereas Levofloxacin (138/150; 92%), Ciprofloxacin (123/150; 82%), Neomycin (120/150; 80%), and Colistin (117/150; 78%), exhibited potential effectiveness. A huge frequency of 60% (90 out of 150) of pathogens exhibited as high as 21 antimicrobial resistance patterns towards a minimum of 4 antibiotics and a maximum of 8 antibiotics, whereas Aeromonas spp. isolates were the most prominent. The investigation would provide substantial guidance to veterinarians and animal husbandmen involved in fish cultivation to design therapeutics against infections. Regular and vigorous investigation and implementation of the acquired knowledge would be the only possible solution to halt the rapid increase of antimicrobial resistance.\u0000J. Bangladesh Acad. Sci. 48(1); 61-74: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"5 19","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336953","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.69202
A. G. Adam, Shirajum Munira Munira, Hasna Hena Begum
A field trial was carried out to investigate the responses of TIBA (0, 25, 50, 75, and 100 ppm) on growth, yield, and biochemical components of BARI Maize-6. Results revealed that plant height gradually reduced with the rising levels of TIBA but non-significantly. The application of 75 ppm TIBA resulted in the highest number of leaves and maximum dry weight of leaves and stems, whereas the dry weight of leaves was significantly higher than that of the control. Plants treated with 50 ppm TIBA resulted in maximum dry weight of roots, absolute growth rate, and relative growth rate, but statistically, they were at par with the rest of the treatments. The total number of cobs per plant was noted to be the highest at 50 ppm, followed by 75 ppm TIBA. Application of 75 ppm TIBA produced the highest fresh (127.10 g) and dry (111.51 g) weight of cobs, the longest cob (17.07 cm), the maximum number of kernels per row (31.81) and cob (408.17), dry weight of tassel (3.75 g), yield per plant (107.07 g) yield per hectare (7138.08 kg) and harvest index (89.72%). Significantly higher values were noted in the case of fresh and dry weight of cobs, number of kernels per cob, yield per plant, and yield per hectare. Yield per plant due to 75 ppm TIBA increased by 65.72% over control. Pigment contents of leaves responded positively following most of the TIBA treatments except chl. a content at the tassel initiation stage. Positive responses of TIBA in the protein content of leaves were also obtained in most cases. The maximum protein content of seeds was recorded from 50 ppm (94.88 mg/g) followed by 75 ppm (83.94 mg/g) TIBA but with a similar statistical identity. Among five treatments, 75 ppm TIBA produced better stimulations. J. Bangladesh Acad. Sci. 48(1); 45-50: June 2024
{"title":"Responses of tiba on growth, yield and biochemical components of BARI Maize-6","authors":"A. G. Adam, Shirajum Munira Munira, Hasna Hena Begum","doi":"10.3329/jbas.v48i1.69202","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.69202","url":null,"abstract":"A field trial was carried out to investigate the responses of TIBA (0, 25, 50, 75, and 100 ppm) on growth, yield, and biochemical components of BARI Maize-6. Results revealed that plant height gradually reduced with the rising levels of TIBA but non-significantly. The application of 75 ppm TIBA resulted in the highest number of leaves and maximum dry weight of leaves and stems, whereas the dry weight of leaves was significantly higher than that of the control. Plants treated with 50 ppm TIBA resulted in maximum dry weight of roots, absolute growth rate, and relative growth rate, but statistically, they were at par with the rest of the treatments. The total number of cobs per plant was noted to be the highest at 50 ppm, followed by 75 ppm TIBA. Application of 75 ppm TIBA produced the highest fresh (127.10 g) and dry (111.51 g) weight of cobs, the longest cob (17.07 cm), the maximum number of kernels per row (31.81) and cob (408.17), dry weight of tassel (3.75 g), yield per plant (107.07 g) yield per hectare (7138.08 kg) and harvest index (89.72%). Significantly higher values were noted in the case of fresh and dry weight of cobs, number of kernels per cob, yield per plant, and yield per hectare. Yield per plant due to 75 ppm TIBA increased by 65.72% over control. Pigment contents of leaves responded positively following most of the TIBA treatments except chl. a content at the tassel initiation stage. Positive responses of TIBA in the protein content of leaves were also obtained in most cases. The maximum protein content of seeds was recorded from 50 ppm (94.88 mg/g) followed by 75 ppm (83.94 mg/g) TIBA but with a similar statistical identity. Among five treatments, 75 ppm TIBA produced better stimulations.\u0000J. Bangladesh Acad. Sci. 48(1); 45-50: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"81 15","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141338096","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 : 2024-06-15DOI: 10.3329/jbas.v48i1.68708
Indrajit Saha, Shinji Kuroda
We have studied the structural and magnetic properties of Zn1-xFexTe thin films grown under Te-rich flux condition with almost same Fe composition, x = 1.3%, on both undoped and nitrogen (N) acceptor doped ZnTe buffer layer by molecular beam epitaxy (MBE). Structural analysis by XRD and XAFS reveals that Zn0.987Fe0.013Te films are mainly composed of pure diluted phase with substitutional Fe atoms on the Zn-site in the zinc-blende (ZB) ZnTe in both cases. However, the magnetization measurement using SQUID shows distinctly different magnetic properties among these films; a linear dependence of magnetization on magnetic field (M-H), typical of van-Vleck paramagnetic behavior of Zn0.987Fe0.013Te film grown over undoped ZnTe turns into ordinary paramagnetic behavior with S-shape M-H curve for film grown on N-doped ZnTe buffer layer, [N] ≈ 1020 cm-3 which may reflect the impact of interfacial holes provided by N-acceptors on the valence state of substitutional Fe. J. Bangladesh Acad. Sci. 48(1); 27-34: June 2024
{"title":"Effect of p-type doped buffer layer on the structural and magnetic properties of (Zn,Fe)Te dilute magnetic semiconductor","authors":"Indrajit Saha, Shinji Kuroda","doi":"10.3329/jbas.v48i1.68708","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.68708","url":null,"abstract":"We have studied the structural and magnetic properties of Zn1-xFexTe thin films grown under Te-rich flux condition with almost same Fe composition, x = 1.3%, on both undoped and nitrogen (N) acceptor doped ZnTe buffer layer by molecular beam epitaxy (MBE). Structural analysis by XRD and XAFS reveals that Zn0.987Fe0.013Te films are mainly composed of pure diluted phase with substitutional Fe atoms on the Zn-site in the zinc-blende (ZB) ZnTe in both cases. However, the magnetization measurement using SQUID shows distinctly different magnetic properties among these films; a linear dependence of magnetization on magnetic field (M-H), typical of van-Vleck paramagnetic behavior of Zn0.987Fe0.013Te film grown over undoped ZnTe turns into ordinary paramagnetic behavior with S-shape M-H curve for film grown on N-doped ZnTe buffer layer, [N] ≈ 1020 cm-3 which may reflect the impact of interfacial holes provided by N-acceptors on the valence state of substitutional Fe.\u0000J. Bangladesh Acad. Sci. 48(1); 27-34: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"1 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141336086","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 : 2024-06-13DOI: 10.3329/jbas.v48i1.71538
Kamrunnahar Happy, Sumaiya Khan, Umme Aiman Liza, Afsana Mimi, Md Rafikul Islam, Mohammad Mamun Hossain
2-Azetidinones (β-lactams) possess broad and potent bioactivity owing to the presence of lactam rings. As evidence has shown, it is one of the most critical biological frameworks. Some new 2- azetidinones have been synthesized from corresponding Schiff bases using different amines and aldehydes. All compounds (Schiff bases and β- lactams) were synthesized for comparison research using conventional and microwave techniques. The microwave approach has been found to reduce reaction time and boost yield drastically. Analysis combining elemental (C, H, and N) and spectroscopic approaches (NMR, IR, and UV) have been applied to ensure the Schiff bases constitution and corresponding β-lactams constitution. The newly synthesized compound's antibacterial action was estimated opposite to one gram-positive and one gram-negative bacteria. One compound (A-03) among synthesized 2-azitidinones was shown significant activity against the gram-positive bacteria. The other synthesized compounds had no substantial activity on either of the microorganisms. J. Bangladesh Acad. Sci. 48(1); 111-119: June 2024
{"title":"Synthesis of some 2-azitidinones (β-lactams) as antibiotic mimics and screening of their antimicrobial activity","authors":"Kamrunnahar Happy, Sumaiya Khan, Umme Aiman Liza, Afsana Mimi, Md Rafikul Islam, Mohammad Mamun Hossain","doi":"10.3329/jbas.v48i1.71538","DOIUrl":"https://doi.org/10.3329/jbas.v48i1.71538","url":null,"abstract":"2-Azetidinones (β-lactams) possess broad and potent bioactivity owing to the presence of lactam rings. As evidence has shown, it is one of the most critical biological frameworks. Some new 2- azetidinones have been synthesized from corresponding Schiff bases using different amines and aldehydes. All compounds (Schiff bases and β- lactams) were synthesized for comparison research using conventional and microwave techniques. The microwave approach has been found to reduce reaction time and boost yield drastically. Analysis combining elemental (C, H, and N) and spectroscopic approaches (NMR, IR, and UV) have been applied to ensure the Schiff bases constitution and corresponding β-lactams constitution. The newly synthesized compound's antibacterial action was estimated opposite to one gram-positive and one gram-negative bacteria. One compound (A-03) among synthesized 2-azitidinones was shown significant activity against the gram-positive bacteria. The other synthesized compounds had no substantial activity on either of the microorganisms.\u0000J. Bangladesh Acad. Sci. 48(1); 111-119: June 2024","PeriodicalId":15109,"journal":{"name":"Journal of Bangladesh Academy of Sciences","volume":"67 14","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141346416","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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