Bangladesh Journal of Scientific and Industrial Research最新文献_第2页

Molybdenum(VI) complexes of N, N′-bis isatin diamine Schiff base: Synthesis and characterization N，N′-双异atin二胺席夫碱钼(VI)配合物：合成与表征

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-12-23 DOI: 10.3329/bjsir.v58i4.66371

Abul Kalam Md. Lutfor Rahman, Aparna Sarker, M. Bashir, M. L. Hossain

引用次数: 0

Enhancing usable appliances for energy integration with solar power 加强可用电器与太阳能的能源整合

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-12-23 DOI: 10.3329/bjsir.v58i4.65689

Sumon Chandra Debnath, N. Yeasmin, A. Siddika, M. Sultana, M. S. Bashar, M. Rahaman, Suravi Islam, S. Tabassum

{"title":"Enhancing usable appliances for energy integration with solar power","authors":"Sumon Chandra Debnath, N. Yeasmin, A. Siddika, M. Sultana, M. S. Bashar, M. Rahaman, Suravi Islam, S. Tabassum","doi":"10.3329/bjsir.v58i4.65689","DOIUrl":"https://doi.org/10.3329/bjsir.v58i4.65689","url":null,"abstract":"Solar energy is one of the prospective sources of Bangladesh which can meet energy demand and provide a contribution to sustainable development goals. Besides the use of the solar system in electricity generation for households, some other sectors are also using photovoltaic in irrigation, street lighting, water pumping, etc. This article introduces the idea of some other applications of solar photovoltaic systems. Here, solar backpack, farm hat, and grass cutter are designed and fabricated to utilize solar energy for recharging storage systems as well as being operated directly in the daylight. Solar powered charging backpack uses a solar panel of 5 W/17 V capacity at the front side of the backpack with a 5 V output voltage which can charge mobile phone or rechargeable battery. The results clearly showed that it is capable to charge the phone and the charging level of mobile phone successfully raised from 22% to 88% within 5 hours by putting it in direct sunlight on cloudy weather. This article also explained solar farm hat which is very simple but effective for our farmers. Light weight solar powered fan (1.92 W/12 V DC) placed on the top of the hat which is used to cool their face. Lighting (4 ultra-bright 3 V LEDs) and battery charging system are also attached in this system. Further, Solar powered grass cutter machine is designed and developed mainly considering the air pollution using fossil fuels which can also be a usable solar energy appliances. These appliances can keep role to build a eco-friendly system. Bangladesh J. Sci. Ind. Res. 58(4), 191-200, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"7 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161699","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 manganese oxide from manganese ore of bajaur agency khyber Pakhtunkhwa (KPK), Pakistan 从巴基斯坦开伯尔-普赫图赫瓦（KPK）巴焦尔机构的锰矿石中合成氧化锰

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-12-23 DOI: 10.3329/bjsir.v58i4.64335

Uzma Zafar, Muhammad Arif Bhatti, R. Mehmood

{"title":"Synthesis of manganese oxide from manganese ore of bajaur agency khyber Pakhtunkhwa (KPK), Pakistan","authors":"Uzma Zafar, Muhammad Arif Bhatti, R. Mehmood","doi":"10.3329/bjsir.v58i4.64335","DOIUrl":"https://doi.org/10.3329/bjsir.v58i4.64335","url":null,"abstract":"In the present work manganese sulphate developed from the Bajaur (KPK, Pakistan) manganese ore was utilized successfully for the synthesized Manganese Oxide chemically by an alkali-oxidation of manganese sulphate using the co-precipitation method. The advantages of this eco-friendly co-precipitation method include quick and easy preparation, simple control of particle size, and cost-effective composition using local ore. Because of the readily available raw materials and the controlled reaction conditions, this method is widely used in industry. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the synthetic manganese oxide. Fourier transforms infrared spectroscopy (FTIR) Infrared reveals that the O-Mn-O vibrational mode occurs in pure manganese oxide at wavelengths between 600 and 500 cm-1. The chemical composition was obtained by EDX analysis and confirmed the presence of Mn and O in the sample. Experimental optimization was done for the manganese oxide precipitation conditions. The findings show that a variety of parameters have an impact on the product yield; the precursor ratio and reaction temperature are the most important variables, and the reaction time and pH value have the greatest impact on the quality of crystallization. Bangladesh J. Sci. Ind. Res. 58(4), 221-230, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"1 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161776","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

Load countervail access for spectrum management in wireless sensor networks following Industry 4.0 工业4.0之后无线传感器网络频谱管理的负载补偿接入

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.66374

Md Kabir Uddin, M Kamrul Alam Khan, MA Sobhan, Farruk Ahmed, MN Nabi

引用次数: 0

Sustainable agrivoltaic system for food and energy sector in Bangladesh 孟加拉国粮食和能源部门的可持续农业光伏系统

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.66934

S M Nasif Shams, Shamim Reza, Tanvir H Mojumder, Mohammad Abdul Matin

{"title":"Sustainable agrivoltaic system for food and energy sector in Bangladesh","authors":"S M Nasif Shams, Shamim Reza, Tanvir H Mojumder, Mohammad Abdul Matin","doi":"10.3329/bjsir.v58i3.66934","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.66934","url":null,"abstract":"In South Asia, agriculture heavily relies on groundwater for irrigation. The withdrawal is nearly 250 km3 annually. Approximately, 12 million electric and 10 million diesel water extraction pumps, totaling about 22 million, are in use in this area. In contrast, while PV-powered solar irrigation pumps are becoming more popular, they take up agricultural land, increasing the competition for land resources between food and clean energy production. It is left unattended during the off-season, wasting a lot of potential solar power that could produce green electricity. To address this, an integrated farming model can be established, utilizing existing solar pump facilities for crop cultivation, rearing Black Bengal Goats, and native fish farming. This diversified approach combines sustainable energy solutions with solar irrigation, generating both agricultural products and electricity while maintaining agricultural land for cultivation and promotion of clean energy production. The proposed method has produced both agricultural products and electricity simultaneously. This integrated system offers a solution to the challenges faced in the region, balancing food production and clean energy goals effectively. Bangladesh J. Sci. Ind. Res. 58(3), 163-172, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135865894","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

Power point tracker mounted solar powered DC induction cooker 电源点跟踪安装太阳能直流电磁炉

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.65550

S M Nasif Shams, Fahmida Sultana Priti, Arghya Saha, M Asif Haque

引用次数: 0

Phytochemical analysis and in vitro anti-oxidant activity of Moringa oleifera leaves extract 辣木叶提取物的植物化学分析及体外抗氧化活性研究

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.67085

Khondoker Shahin Ahmed, MH Hossain, Nusrat Jahan Ethan, Ismet Ara Jahan

{"title":"Phytochemical analysis and in vitro anti-oxidant activity of Moringa oleifera leaves extract","authors":"Khondoker Shahin Ahmed, MH Hossain, Nusrat Jahan Ethan, Ismet Ara Jahan","doi":"10.3329/bjsir.v58i3.67085","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.67085","url":null,"abstract":"The phytochemical contents such as, total phenolic, flavonoid and tannin content of ethanol extract of tender and matured leaves of Moringa oleifera were investigated. On the other hand, antioxidant activity test (total antioxidant activity, ABTS free radical scavenging activity, reducing power and ferrous ion chelating ability) were also studied. Total Phenolic content (203.80 ± 0.0014 and 105.00 ± 0.0045) mg/g gallic acid equivalent, total flavonoid content (26.02 ± 0.0031 and 18.20 ± 0.0025) mg/g quercetin equivalent and the total tannin content (12.90 ± 0.0021 and 10.50 ± 0.0012) mg/g of tannic acid equivalent were found in the ethanol extracts of tender and matured leaves of Moringa oleifera, respectively. The total antioxidant capacity of both leaves of the ethanol extracts were 217.43 ± 0.0025 mg/g and 210.65 ± 0.0019 mg/g respectively of ascorbic acid equivalent, respectively. Firstly, the IC50 value of tender and matured leaves of free radical scavenging activity test for ABTS (0.57 ± 0.0135 and 0.61 ± 0.0258) mg/mL were obtained using ascorbic acid as positive control (0.50 ± 0.0265 mg/mL). Secondly, reducing power ability was increased with higher concentration of all samples and standard. Finally, the IC50 value for ferrous ion chelating ability test was observed 5.10 ± 0.0121 and 9.20 ± 0.0212 mg/mL for ethanol extracts of tender and matured leaves respectively, whereas standard Na2EDTA was 4.0±0.0135 mg/mL. The result revealed that the ethanol extract of tender leaves showed more in-vitro antioxidant properties that of matured leaves. Bangladesh J. Sci. Ind. Res. 58(3), 179-186, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135865886","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

Pesticidal effect of naphthalene and different Botanicals against anguimous grain moth (Sitotroga cerealella) 萘与不同植物制剂对小谷蛾的杀虫效果

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.66797

Tapon Kumar Roy, A Sannal, S Akter, SMMS Tonmoy, T Chakrobarty, MR Hasan, MN Bari

{"title":"Pesticidal effect of naphthalene and different Botanicals against anguimous grain moth (Sitotroga cerealella)","authors":"Tapon Kumar Roy, A Sannal, S Akter, SMMS Tonmoy, T Chakrobarty, MR Hasan, MN Bari","doi":"10.3329/bjsir.v58i3.66797","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.66797","url":null,"abstract":"A lab experiment was conducted during June to October 2021 at Bangladesh Rice Research Institute (BRRI), regional station Rangpur, laboratory to assess the effectiveness of some botanicals i.e., neem (Azadirachta indica), tulsi (Ocimum tenuiflorum) and ginger (Zingiber officinale)) and chemicals (naphthalene) for the management of Anguimous grain moth (Sitotroga cerealella) of rice. The experiment was carried out Complete Randomized Design (CRD) with nine treatments (T1=Control, T2=5 whole dried neem leaf, T3=0.25 ml neem oil, T4=0.25 g ginger powder, T5=0.25 g neem leaf powder, T6= 0.25 g mixture of neem leaf powder and ginger powder, T7=0.25 g Naphthalene, T8= 5 whole tulsi leaf and T9= 0.25 g neem seed powder) and three replications. Study among the nine treatment indicated that T9 (0.25 g naphthalene) showed better performance in case of insect mortality and no F1 emergence followed by T3 (0.35 ml neem oil), T9 (0.25 g neem seed powder) and T6 (0.25 g mixture of neem leaf powder and ginger powder). Moderate performance was found T5 (0.25 g neem leaf powder), T2 (5 whole dried neem leaf) in case of insect mortality and number of F1 emergence. But in case of seed germination T5 (0.25 g neem leaf powder) showed better performance followed by T7 (0.25 g naphthalene), T9 (0.25 g neem seed powder), T6 (0.25 g mixture of neem leaf powder and ginger powder) and T3 (0.25 ml neem oil). So, naphthalene, neem oil, neem seed powder and neem leaf powder considered as the best treatment among nine treatments for the management of the most destructive Anguimous grain moth. Bangladesh J. Sci. Ind. Res. 58(3), 155-162, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135866045","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

Pollution loads identification and ecological risk assessment of heavy metals in Patuakhali coastal sediment of Bangladesh 孟加拉国帕图阿卡里海岸沉积物重金属污染负荷识别及生态风险评估

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.65868

Nigar Sultana Nigar, Mohammad Mahbubur Rahman, Shamima Akther Eti

{"title":"Pollution loads identification and ecological risk assessment of heavy metals in Patuakhali coastal sediment of Bangladesh","authors":"Nigar Sultana Nigar, Mohammad Mahbubur Rahman, Shamima Akther Eti","doi":"10.3329/bjsir.v58i3.65868","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.65868","url":null,"abstract":"Toxic heavy metals are destroying Bangladesh's coastal sediment due to their ubiquitous nature and accumulation proficiency. The goal of this study was to measure toxic heavy metals iron (Fe), manganese (Mn), nickel (Ni), arsenic (As), cadmium (Cd), lead (Pb), mercury (Hg), copper (Cu), chromium (Cr), zinc (Zn) in Patuakhali coastal sediments of Bangladesh using an atomic absorption spectrometer (AAS) and estimate their ecological risk. The pollution load was calculated using different indices i.e., the pollution factor (CF), the geo-accumulation index (Igeo), the pollution load index (PLI), and the enrichment factor (EF), etc. The spatial distribution was determined using Arc-GIS. The metals concentration range were Fe (10805-36255) mg/kg, Zn (26.91-407.75) mg/kg, Cu (11.25-65.75) mg/kg, Cr (5.425-7.11) mg/kg, Ni (119.94-246.24) mg/kg, Mn (110.88-178.18) mg/kg, As (0.0026-0.097) mg/kg and Hg (0.02-0.12) mg/kg. Cd and Pb concentrations were below the detection limit. Compared to the US-sediment EPA's quality guideline, this coastal area was highly contaminated with Fe, Cu, and Ni, and moderately contaminated with Mn and Zn. Pollution indices exposed this area was contaminated with Ni and Zn. The metals were distributed in order of Zn>Ni>Fe>Cu>Hg>Cr>As and Ni>Zn>Cu>Fe>Mn>Hg>Cr>As for EF and Igeo respectively. The Potential Ecological Risk Index (PERI) ranged from 94.03 to 241.021, demonstrating a moderate to significant potential ecological risk. Bangladesh J. Sci. Ind. Res. 58(3), 143-154, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135866049","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

Excessive consumption of certain sea fishes and mushrooms may pose significant health risks 过量食用某些海鱼和蘑菇可能对健康构成重大威胁

Bangladesh Journal of Scientific and Industrial Research Pub Date : 2023-09-25 DOI: 10.3329/bjsir.v58i3.67491

M Seth, P Mondal, D Ghosh, SK Mukhopadhyay

引用次数: 1