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Effect of substitution of methanatoboron difluoride derivatives on non-covalent interactions with tetraphenylporphyrin 二氟化甲烷硼衍生物取代对四苯基卟啉非共价相互作用的影响
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62018
C. Pal
{"title":"Effect of substitution of methanatoboron difluoride derivatives on non-covalent interactions with tetraphenylporphyrin","authors":"C. Pal","doi":"10.3329/bjsir.v57i3.62018","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62018","url":null,"abstract":"Tetraphenylporphyrin (TPP) forms non-covalent supra-molecular complexes with methanatoboron difluoride (MBDF) derivatives in dichloromethane. The photo-chemical properties of the association equilibrium of free TPP and MBDFs with the respective supra-molecular complexes were investigated in the ground state. There is formation of isosbestic points which had been taken as proof of the existence of equilibrium between the absorbing species. Monte Carlo simulation and Density functional theory calculation established the experimental results of non-covalent interactions in terms of loss of planarity and frontier molecular orbital calculations defines the electron donor and acceptor. The direction of electron flow is confirmed by the electrochemical indices. The electron rich substituent in MBDF favours the non-covalent binding ability between TPP and MBDF. Both H-bonding and charge transfer interactions are primarily responsible in stabilising these complexes. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 163-172, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45420167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles Gd3+掺杂尖晶石立方CoFe2O4纳米颗粒的Reitveld细化、结构、光学带隙和低温磁性表征
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62019
A. Kumar, MK Gora, S. Kumar, B. Choudhary, P. Maheshwari, SN Dolia
{"title":"Reitveld refinement, structural, optical band gap and low-temperature magnetic characterization of Gd3+ doped spinel cubic CoFe2O4 nanoparticles","authors":"A. Kumar, MK Gora, S. Kumar, B. Choudhary, P. Maheshwari, SN Dolia","doi":"10.3329/bjsir.v57i3.62019","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62019","url":null,"abstract":"The current study unravels the structural, optical band gap and magnetic characteristics of rare-earth (RE) gadolinium (Gd) substituted CoGdxFe2-xO4 (x= 0.00 - 0.10, in the interval of 0.02) nanocrystallites synthesized by the sol-gel self-ignition route. The XRD analysis and Rietveld refinement confirmed the existence of a single cubic phase with a crystallite size of ~15-21 nm range, further confirmed by HRTEM results. SEM images confirmed the well-known nano-size morphology for all the samples. The magnetization measurements show a hard ferromagnetic nature for all specimens within the temperature range of 20-300K. Coercivity, remanent, and saturation magnetization monotonically increased with a reduction in temperature from 300K to 20K. UV-Vis absorbance results show that the band gap energy of CoFe2O4 nanoparticles (NPs) decreases with increasing Gd3+ ion doping and have band gap energy values of 2.47, 2.15, 2,02, 2.00, 1.43 and 1.95 eV for x= 0.00, 0.02, 0.04, 0.06, 0.08, 0.10, respectively in CoGdxFe2-xO4 nanoferrites. The present study reveals that structural, optical band gap and magnetic properties could be altered by monitoring the quantity of gadolinium in cobalt nanoferrites. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 173-186, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69483294","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Mathematical modeling and simulation of control strategies for continuous stirrer tank reactor 连续搅拌釜反应器控制策略的数学建模与仿真
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62017
HG Ibrahim
{"title":"Mathematical modeling and simulation of control strategies for continuous stirrer tank reactor","authors":"HG Ibrahim","doi":"10.3329/bjsir.v57i3.62017","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62017","url":null,"abstract":"This study aims to establish a mathematical model for the Continuous Stirred Tank Reactor (CSTR) reactor that exhibits highly nonlinear dynamics and was carried out implemented by model-based conventional and non-conventional controllers for temperature control. The developed controllers were Proportional, Proportional-Integral, Proportional-Derivative, Proportional-Integral-Derivative, Two Degrees of Freedom, and Model Predictive Controller. Then, the controllers were simulated, tuning, and optimized using Matlab®/Simulink®. The response results were compared and the analysis performed. The results indicated that the performance of 2-DOF-PID and MPC controllers is better than other conventional controllers for nonlinear systems such as the CSTR process. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 149-162, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49140718","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Fatty acid compositions of seeds of some proprietary safflower (Carthamus tinctorius L.) cultivars 一些专有红花(Carthamus tinctorius L.)品种种子的脂肪酸组成
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62021
Zeynep Dumanoğlu
{"title":"Fatty acid compositions of seeds of some proprietary safflower (Carthamus tinctorius L.) cultivars","authors":"Zeynep Dumanoğlu","doi":"10.3329/bjsir.v57i3.62021","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62021","url":null,"abstract":"Safflower, an important oil plant, has been cultivated for about 3000 years. Due to the fact that it is used as a raw material in many sectors, safflower has been examined in various studies. This study was carried out in the laboratories of the Department of Biosystem Engineering and the Central Laboratory Application and Research Center, Faculty of Agriculture, Bingol University between 2020 and 2021. In the study, the saturated fat contents of the seeds of four different registered safflower varieties (Balcı, Dinçer, Yektay, and Yenice) were determined. It was found that there were 19 different components in all safflower varieties. Oleic acid (20.03% to 34.41%) and Linoleic acid (39.79% to 53.70%) were found to be in the highest rates, and some fatty acids were detected in trace levels. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 195-198, 2022  ","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46744454","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mastic gum aided amoxicillin trihydrate gastro retentive mucoadhesive microspheres: In vivo evaluation 乳胶胶辅助三水合阿莫西林胃保留黏附微球:体内评价
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62020
H. Sowjanya, Harati Ahad
{"title":"Mastic gum aided amoxicillin trihydrate gastro retentive mucoadhesive microspheres: In vivo evaluation","authors":"H. Sowjanya, Harati Ahad","doi":"10.3329/bjsir.v57i3.62020","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62020","url":null,"abstract":"The primary objective of the study is to test gastro retentive mucoadhesive Amoxicillin trihydrate (ATH) microspheres for various in vivo properties. Several metrics were used to assess the improved ATH Mastic gum mucoadhesive microspheres (AMMM) in vitro. In vivo testing was conducted using formula-8 (AMMM-8), as suggested by prior study results by Soujanya et al., 2022. Four healthy rabbits of both sexes were used to assess the availability of plasma medicines. Pharmacokinetic parameters were measured in plasma samples. The study revealed that in vivo animal studies in rabbits showed good drug levels of ATH. After a single dose of formulation AMMM-8 (44.28mg/kg), the symmetrical mean Cmax (25.69±0.11μg/ml) tmax (6h), AUC (0-10h) (185.1±1.28 μg.h/ml), AUC (0-∞) (269.1±4.68 μg.h/ml), and AUMC (840.42±2.23 μg.h/ml) were better than ATH. According to the findings, ATH reached systemic circulation faster than the pure medication and had acceptable kinetic values. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 187-194, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48148975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Altered anatomical appraisal of mung bean (Vigna radiata (L.) Wilczek) under salinity stress 盐度胁迫下绿豆（Vigna radiata（L.）Wilczek）解剖结构的改变
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62016
H. Khan, Tk. Ghosh, M. Mia
{"title":"Altered anatomical appraisal of mung bean (Vigna radiata (L.) Wilczek) under salinity stress","authors":"H. Khan, Tk. Ghosh, M. Mia","doi":"10.3329/bjsir.v57i3.62016","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62016","url":null,"abstract":"Mung bean, an important pulse crop, its growth, and development are affected by various abiotic stresses where salinity hampers yield seriously. An experiment was conducted under the hydroponic condition to observe the effect of salinity on the anatomical attributes of mung bean genotypes. The design of the experiment was randomized complete with factorial having five levels of salinities i.e. 0 (control), 6, 8, 10, 12 dSm-1. The results indicated that anatomical features of mung bean plants were affected by the application of salt. The cortex and stele radius and vascular bundle strands were reduced due to salt application. The vascular bundle size especially the length was decreased with the increased levels of salinity. Similarly, the radius of cortex was also decreased with the increased levels of salinity. The results concluded that the application of salts altered the plant's internal structures, especially the vascular bundles and leaf spongy parenchyma tissue. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 139-148, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41718077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Leather processing industry waste (lime fleshing): A prospective substrate for production of biodiesel 皮革加工工业废料(石灰剥皮):生产生物柴油的潜在原料
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-09-28 DOI: 10.3329/bjsir.v57i3.62015
S. Banik, TE Nafis, U. Roy, MS Islam
{"title":"Leather processing industry waste (lime fleshing): A prospective substrate for production of biodiesel","authors":"S. Banik, TE Nafis, U. Roy, MS Islam","doi":"10.3329/bjsir.v57i3.62015","DOIUrl":"https://doi.org/10.3329/bjsir.v57i3.62015","url":null,"abstract":"Production of biodiesel using leather industry solid wastes (leather lime fleshing) containing high fats and proteins was developed, which benefitted both the ways to manage waste along with generation of renewable energy. Oil from this waste was obtained using solvent extraction process. Acid catalyzed esterification followed by transesterification using KOH was used in this biodiesel production process. Extracted oil containing high free fatty acid of 11.19 % was subjected to acid catalyzed esterification using 80% methanol, 2.5 % H2SO4 at 70 °C for 60 min. The esterified oil than trans esterified into biodiesel using 60% methanol and 0.8% KOH at 60 °C for 120 min. Biodiesel yield was 95.81%. Characteristics of produced biodiesel like flash point (145 oC), acid value (2.7 mg KOH/g), density (0.870 g/cc), pour point (-12 oC) and viscosity (5.79 and 1.2 cSt at 40 and 100 oC respectively) etc. were determined. These characteristics were very close to the commercial biodiesel standards. The renewable leather industry waste could be a potential sources of biodiesel production and would protect environment and contribute to energy demand. \u0000Bangladesh J. Sci. Ind. Res. 57(3), 131-138, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47708402","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mononuclear cobalt(III) azido complex containing a tetradentate amine: one pot synthesis, structure and thermal behavior 含四齿胺的单核叠氮钴（III）配合物：一锅法合成、结构和热行为
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-06-26 DOI: 10.3329/bjsir.v57i2.60407
Sumitava Khan
{"title":"Mononuclear cobalt(III) azido complex containing a tetradentate amine: one pot synthesis, structure and thermal behavior","authors":"Sumitava Khan","doi":"10.3329/bjsir.v57i2.60407","DOIUrl":"https://doi.org/10.3329/bjsir.v57i2.60407","url":null,"abstract":"One hexacoordinated mononuclear complex trans-[Co(L)(N3)2] PF6 (1) [L = N,N′-bis(3-aminopropyl)- 1,2-ethanediamine] is prepared by using one-pot reactions of the building units and characterized. X-ray analysis shows that cobalt center in 1 adopts a distorted octahedral geometry with CoN6 chromophore ligated through four N atoms of tetradentate amine (L) and the two N atoms of terminal azides in mutual trans orientation. In the crystalline state, double N-H…N and multiple N-H…F hydrogen bondings result in 2D sheet structure. The compound has a thermal stability up to 193°C. \u0000Bangladesh J. Sci. Ind. Res. 57(2), 109-116, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44490829","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of nano-sized magnetic iron oxide by a simple and facile o-precipitation method 简易o-沉淀法合成纳米磁性氧化铁
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-06-26 DOI: 10.3329/bjsir.v57i2.60402
J. Khanam, Mf Ahmed, Skm Zaman, N. Sharmin, S. Ahmed
{"title":"Synthesis of nano-sized magnetic iron oxide by a simple and facile o-precipitation method","authors":"J. Khanam, Mf Ahmed, Skm Zaman, N. Sharmin, S. Ahmed","doi":"10.3329/bjsir.v57i2.60402","DOIUrl":"https://doi.org/10.3329/bjsir.v57i2.60402","url":null,"abstract":"Magnetic iron oxide (Fe3O4) in nano form has been synthesized by a simple wet chemical method involving co-precipitation using iron salt and ammonium hydroxide as precipitating agents. Characterization of the synthesized nanoparticles were carried out by using XRD, FTIR, FESEM and VSM techniques. Crystallite sizes determined from XRD data were found to be between 6.8 and 12.6 nm with face center cubic crystal structures. The lattice parameter was determined to be 8.34 Å. FESEM microstructure revealed a spherical like nanoparticles with average particle size of. The saturation magnetization of the synthesized magnetite nanoparticles was measured to be 49.88 emu/gm. The Fe3O4 nanoparticles synthesized by co-precipitation method is considered to be potentiality good magnetic material with diverse applications. \u0000Bangladesh J. Sci. Ind. Res. 57(2), 67-76, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41449379","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Development of methods for quantification of gelatin in vegetable capsule shell and for classification of capsule shell as from vegetable or animal sources by chemometric analysis of FTIR spectroscopic data 蔬菜胶囊壳中明胶的定量方法的发展以及通过FTIR光谱数据的化学计量分析将胶囊壳分类为蔬菜或动物来源的方法的发展
Bangladesh Journal of Scientific and Industrial Research Pub Date : 2022-06-26 DOI: 10.3329/bjsir.v57i2.60405
A. Debnath, M. Uddin, Raunaq Jahan, A. Rana, M. Karim
{"title":"Development of methods for quantification of gelatin in vegetable capsule shell and for classification of capsule shell as from vegetable or animal sources by chemometric analysis of FTIR spectroscopic data","authors":"A. Debnath, M. Uddin, Raunaq Jahan, A. Rana, M. Karim","doi":"10.3329/bjsir.v57i2.60405","DOIUrl":"https://doi.org/10.3329/bjsir.v57i2.60405","url":null,"abstract":"Capsule shell from animal source (bovine or porcine gelatin) is a problem for the follower of different religions and vegetarian. In that case, vegetable capsule shell could be a solution. In this research, we proposed a simple and cost-effective technique for detection of gelatin in vegetable capsule shell and for classification of capsule shell by source, based on Chemometric techniques with FTIR spectroscopic data. Partial Least-Square Regression (PLSR) models were developed and their efficiencies were assessed with spectroscopic data of range of 4000-700 cm-1. PLSR shows very good prediction efficiency (R2= 98%) for both vegetable capsule shell and gelatin. In addition, Soft Independent Modeling by Class Analogy (SIMCA) classification method were developed and assessed with spectral data of capsule shells from vegetable and animal sources. Results prove that FTIR spectroscopy in combination with chemometric method can be used for the classification of capsule shell by source and quantification of gelatin in vegetable capsule shell to ensure their authenticity. \u0000Bangladesh J. Sci. Ind. Res. 57(2), 91-98, 2022","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46770240","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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