Dhaka University Journal of Science最新文献_第5页

Assessment of Physico-Chemical Parameters of Water Samples Collected from the Southern Part of Bangladesh 孟加拉南部水样理化参数的评估

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60381

M. Shoeb, F. Sharmin, Md. Nazrul Islam, L. Nahar, Rafiza Islam, N. Parvin

引用次数: 0

Proximate Analysis of Melon Seeds Available in Bangladesh 孟加拉国可用瓜子的近似值分析

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60382

Md Reazul Alam Refat, M. Shoeb, A. Sultana

{"title":"Proximate Analysis of Melon Seeds Available in Bangladesh","authors":"Md Reazul Alam Refat, M. Shoeb, A. Sultana","doi":"10.3329/dujs.v70i1.60382","DOIUrl":"https://doi.org/10.3329/dujs.v70i1.60382","url":null,"abstract":"The seeds of winter (wax gourd), long (bottle gourd) and large (pumpkin) melon were analyzed for nutritional parameters mainlyprotein, fat/oil, carbohydrate, dietary fiber, protein, minerals and moisture and fatty acids composition. The double beam ultravioletvisible spectrophotometer was used for analysis of total sugar. The protein content was determined using the Kjeldahl method. An atomic absorption spectrophotometer was used to quantify minerals (Fe, Cu, and Zn). Fatty acid was analyzed by gas chromatography(GC) equipped with a flame ionization detector (FID). From the proximate analysis, it was found that the winter melon (wax gourd)seeds contain protein, oil, carbohydrate, soluble dietary fiber, moisture and ash content of 19.71, 16.46, 56.48, 3.10, 68.88 and 4.26%, respectively. Similarly, long melon (bottle gourd) was found to contain 16.12, 13.61, 46.88, 2.2, 76.45 and 5.2% of protein, oil,carbohydrate, soluble dietary fiber, moisture and ash, respectively. The contents of protein, oil, carbohydrate, soluble dietary fiber,moisture and ash in large melon (pumpkin) seeds were found to be 29.64, 18.17, 55.32, 1.3, 79.53 and 5.12%, respectively. In mineralanalysis, iron, copper, and zinc contents were found to be 6.75, 0.62, and 6.10 mg/100g in winter melon; 7.8, 1.63, and 4.25 mg/100gin long melon; and 13.95, 1.15, and 5.11 mg/100g in large melon, respectively.\u0000Dhaka Univ. J. Sci. 70(1): 58-63, 2022 (January)","PeriodicalId":11280,"journal":{"name":"Dhaka University Journal of Science","volume":"2008 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86219947","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

Composition of Energy Drink Samples in Bangladesh 孟加拉能量饮料样本的成分

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60380

Md Reazul Alam Refat, Polash Nandi, M. Shoeb, A. Sultana

{"title":"Composition of Energy Drink Samples in Bangladesh","authors":"Md Reazul Alam Refat, Polash Nandi, M. Shoeb, A. Sultana","doi":"10.3329/dujs.v70i1.60380","DOIUrl":"https://doi.org/10.3329/dujs.v70i1.60380","url":null,"abstract":"The commercial energy drink samples of 10 different brands were analyzed to study the level of alcohol (if any), sodium benzoate,caffeine, vitamin B, and carbohydrates content. Samples were degassed by ultrasonicator, and CO2 was found to be in a range of 1.27± 0.05 to 4.10 ± 0.10 mL per 100 mL sample. The amount of caffeine, sodium benzoate, glucose, and vitamin B were studied by aUV-Visible spectrophotometer. The wavelength of absorption maxima was 224, 272, 489, 445, and 292 nm, respectively, for sodiumbenzoate, caffeine, glucose, vitamin B2, and vitamin B6. The correlation coefficients of the calibration curves were found to be0.998, 0.992, 0.998, 0.997, and 0.989 for caffeine, glucose, sodium benzoate, vitamin B2 and vitamin B6, respectively. The alcoholcontent was studied by gas chromatography equipped with a flame ionization detector. Ethanol was not found to be present in anysample. The caffeine and sodium benzoate content in different samples was found in the range of 147.84 ± 0.53 to 846.78 ± 2.64 and52.92 ± 6.23 to 1575.37 ± 4.99 μg/mL, respectively. The sugar content in different samples was found to be 16.16 ± 4.25 to 338.33± 0.75 mg/mL. Vitamin B2 was found to be 13.21± 0.08 and 1.04 ± 0.002 μg/mL, respectively in Bacchus and Wild Brew samplesand Vitamin B6 was found to be 261.17 ± 8.38 and 115.88 ± 0.31 μg/mL in Red Bull and Bacchus samples, respectively. The pH ofthe samples was found to be in the range of 2.79 ± 0.04 to 4.88 ± 0.04.\u0000Dhaka Univ. J. Sci. 70(1): 42-48, 2022 (January)","PeriodicalId":11280,"journal":{"name":"Dhaka University Journal of Science","volume":"143 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79635327","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

Mixed Ligand Binuclear Complexes of Copper(II) and Cadmium(II) with Adenine and 1,4-Diazabicyclo[2.2.2]octane 铜(II)和镉(II)与腺嘌呤和1,4-重氮杂环[2.2.2]辛烷的混合配体双核配合物

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60378

Sumaia Abdullah, M. Rahman, A. Shaikh, P. K. Bakshi

{"title":"Mixed Ligand Binuclear Complexes of Copper(II) and Cadmium(II) with Adenine and 1,4-Diazabicyclo[2.2.2]octane","authors":"Sumaia Abdullah, M. Rahman, A. Shaikh, P. K. Bakshi","doi":"10.3329/dujs.v70i1.60378","DOIUrl":"https://doi.org/10.3329/dujs.v70i1.60378","url":null,"abstract":"Mixed ligand binuclear complexes of Cu(II) and Cd(II) with adenine (Ade) and 1,4-diazabicyclo[2.2.2]octane (DABCO) havebeen synthesized at a metal to ligands (M:L:L′) molar ratio of 1:1:1 in aqueous medium under ambient conditions. All synthesizedcomplexes are powdery solids of different colours, slightly soluble in hot water and decompose at high temperature. Characterizationof the complexes was accomplished using various analytical techniques, e.g. metal and chloride content analysis, Fourier transformspectrophotometer (FT-IR), UV-visible spectrophotometer, magnetic measurement, and thermal analyses. The metal and chloridecontents analyses of the complexes reveal to their stoichiometry [M2Cl2(Ade)2(H2O)2(DABCO)]Cl2 [M = Cu(II) or Cd(II)]. Analyticaldata suggests that they are homo metal symmetric binuclear complexes comprises of two [MCl(Ade)(H2O)] moieties in betweena DABCO molecule is N,N′-bridge bonded. The arrangements of the ligands around the metal centers are essentially tetrahedralinvolving N(9) of deprotonated imidazole moiety, one Cl- ion, one oxygen from the water molecule and one tertiary N atom fromDABCO completing the coordination. Proton migration occurs from N(9) to the N(1) site resulting into a zwitterionic form ofadenine, additionally N(3) site of which is hydrogen bonded with the coordinated water molecule. Electrochemical redox behaviourof Cu(II) in presence of adenine and DABCO in the aqueous medium was also studied. It exhibits quasi-reversible one-electrontransfer processes. \u0000Dhaka Univ. J. Sci. 70(1): 28-33, 2022 (January)","PeriodicalId":11280,"journal":{"name":"Dhaka University Journal of Science","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79956069","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

Sensitivity of Different Physics Schemes in the Simulation of Heat Wave Events over Bangladesh Using WRF-ARW Model 不同物理方案在WRF-ARW模式模拟孟加拉国热浪事件中的敏感性

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60384

Sahadat Jaman, Md. Jafrul Islam, A. Imran, M. Kamruzzaman, M. Mallik, Pappu Paul, Imroj Syed

{"title":"Sensitivity of Different Physics Schemes in the Simulation of Heat Wave Events over Bangladesh Using WRF-ARW Model","authors":"Sahadat Jaman, Md. Jafrul Islam, A. Imran, M. Kamruzzaman, M. Mallik, Pappu Paul, Imroj Syed","doi":"10.3329/dujs.v70i1.60384","DOIUrl":"https://doi.org/10.3329/dujs.v70i1.60384","url":null,"abstract":"Heat waves (HWs) are an extreme temperature condition that has a direct impact on human lives. In recent years, a large number ofpeople have died all over the world due to hot weather. The purpose of this study is to predict HWs accurately to mitigate the casualtiescaused by them. Two HW events are selected for this study (Event-1: 0000 UTC of 18 May to 0000 UTC of 25 May 2015, Event-2:0000 UTC of 05 April to 2100 UTC of 08 April 2015). At first, sensitivity tests have been done using different combinations ofphysics schemes. Sensitivity of Planetary boundary layer (PBL) and surface layer (SL) schemes combinations (YSU-Revised MM5,YSU-MM5, MYJ-Eta, and ACM2-Revised MM5) and land surface models (RUC, Noah, Noah-MP, and CLM4) are investigated topredict Comfort Index (CI), which is identified by using Physiological Equivalent Temperature (PET). To simulate PET, the primarymeteorological variables 2-m air temperature (T2), 2-m relative humidity (rh2), mean radiant temperature (TMRT), wind speed at 10m (ws10), and cloud cover data have been used. These parameters were simulated by the WRF model using both single and nesteddomains. The experiments found that the combination of the YSU-MM5 scheme and the Noah land surface model predicted theWRF simulated variables very well. The study also found that the CI exists between the slight heat stress to extreme heat stress andthe maximum PET values were found to be 47.6 ºC and 48.5 ºC for Rajshahi and Khulna event respectively. \u0000Dhaka Univ. J. Sci. 70(1): 70-78, 2022 (January)","PeriodicalId":11280,"journal":{"name":"Dhaka University Journal of Science","volume":"8 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83816435","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

The State of Healthcare Facilities to Provide Diabetes, Cardiovascular and Chronic Respiratory Disease Related Services in Bangladesh 孟加拉国提供糖尿病、心血管和慢性呼吸系统疾病相关服务的保健设施状况

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60376

Gaylan Peyari Tarannum Dana, Sawkia Afroz

{"title":"The State of Healthcare Facilities to Provide Diabetes, Cardiovascular and Chronic Respiratory Disease Related Services in Bangladesh","authors":"Gaylan Peyari Tarannum Dana, Sawkia Afroz","doi":"10.3329/dujs.v70i1.60376","DOIUrl":"https://doi.org/10.3329/dujs.v70i1.60376","url":null,"abstract":"The rapid rise of diabetes, cardiovascular disease (CVD) and chronic respiratory disease (CRD) are causing serious challenges forBangladesh to achieve the sustainable development goal (SDG) target 3.4 by 2030. The study aims to describe the state of healthcarefacilities to provide diagnosis and treatment for diabetes, CVD and CRD related services in Bangladesh. This cross-sectional studyused data from 2017 Bangladesh Health Facility Survey (BHFS). A total of 406 health facilities providing all three services wereconsidered for this study. Findings of the study illustrated that there were rural-urban disparities in healthcare facilities to providediabetics, CVD, CRD related services. Diabetics and CRD related services were significantly higher in public healthcare facilitiesof urban areas compared to rural areas (P <0.008 and P<0.001, respectively). Also, public health facilities of urban areas were morelikely to provide CVD related services compared to rural areas. While private healthcare facilities of urban areas were more likelyto provide CVD, CRD related services than rural areas. Private healthcare facilities of rural areas were in better condition to providediabetes related services than urban areas. However, the country is yet to attain optimal progress in the overall status of health sector.Therefore, in order to cope up with the rising burden of diabetes, CVD and CRD and to minimize the burden of disease specific outofpocket healthcare expenses, recommendations include strengthening and improving stewardship, improving quality of servicesand improving monitoring as well as supervision of decentralized healthcare facilities. \u0000Dhaka Univ. J. Sci. 70(1): 14-21, 2022 (January)","PeriodicalId":11280,"journal":{"name":"Dhaka University Journal of Science","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89041428","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

An Econometric Analysis to Forecast the Food Grain Production in Bangladesh by Using ARIMA and VAR Models 基于ARIMA和VAR模型对孟加拉国粮食产量预测的计量分析

Dhaka University Journal of Science Pub Date : 2022-07-24 DOI: 10.3329/dujs.v70i1.60375

Mehedi Hossain, Murshida Khanam, S. Akhter

引用次数: 1

Scope of Electrochemistry at Liquid/liquid Micro-Interfaces 液体/液体微界面的电化学范围

Dhaka University Journal of Science Pub Date : 2022-07-04 DOI: 10.3329/dujs.v69i3.60029

G. J. Islam, Shaheda Zannah

引用次数: 0

Binary Solvent System for Extraction of Cathode Material From Spent Li-ion Batteries 双溶剂萃取废锂离子电池正极材料的研究

Dhaka University Journal of Science Pub Date : 2022-07-04 DOI: 10.3329/dujs.v69i3.60034

N. Hossain, Md. Ismail Hossain, P. Ahamed, M. A. Yousuf

引用次数: 0

First-Principles Study of Half Metallic Ferromagnetic and Optical Properties of Nb Doped Cubic ZnS using TB-mBJ Approximation 用TB-mBJ近似研究Nb掺杂立方ZnS半金属铁磁和光学性质的第一性原理

Dhaka University Journal of Science Pub Date : 2022-07-04 DOI: 10.3329/dujs.v69i3.60030

Md. Borhanul Asfia, M. Rashid

引用次数: 1