Pub Date : 2023-12-23DOI: 10.3329/bjsir.v58i4.66371
Abul Kalam Md. Lutfor Rahman, Aparna Sarker, M. Bashir, M. L. Hossain
Schiff base ligand of N, N′-bis isatin diamine was synthesized from various diamine and isatin through condensation reaction in 1:2 molar ratio. Mo(VI) complexes of isatin-diamines were synthesized by the reaction between the sodium molybdate dehydrate and N,N' bis isatin diamines with the reflux method. The synthesized ligand and complexes were characterized using spectroscopic techniques. The FT-IR band of azomethine group at 1600- 1610 cm-1 indicated the formation of the ligand. The UV-vis spectra clearly indicated that the prepared complex is a genuine Mo(VI) with d0 electronic configuration. The formation of a coordination bond was revealed by the downfield chemical shift of the complex in the NMR data as compared to the ligand. The UV results were corroborated by molar conductance data, which demonstrated their non-electrolytic character. The experimental evidence primarily supported the synthesis of both ligands and corresponding Mo(VI) complexes. Bangladesh J. Sci. Ind. Res. 58(4), 201-208, 2023
N, N′-双异atin二胺的希夫碱配体是由各种二胺和异atin以 1:2 的摩尔比通过缩合反应合成的。脱水钼酸钠与 N，N'-双异atin 二胺通过回流法反应合成了异atin-二胺的 Mo(VI) 配合物。利用光谱技术对合成的配体和配合物进行了表征。偶氮甲基在 1600-1610 cm-1 处的傅立叶变换红外光谱带表明了配体的形成。紫外-可见光谱清楚地表明，所制备的配合物是真正的 Mo(VI)，具有 d0 电子构型。与配体相比，配合物在核磁共振数据中的下场化学位移显示了配位键的形成。摩尔电导数据证实了紫外结果，证明了它们的非电解特性。实验证据主要支持这两种配体和相应 Mo(VI) 复合物的合成。孟加拉 J. Sci.58(4), 201-208, 2023
{"title":"Molybdenum(VI) complexes of N, N′-bis isatin diamine Schiff base: Synthesis and characterization","authors":"Abul Kalam Md. Lutfor Rahman, Aparna Sarker, M. Bashir, M. L. Hossain","doi":"10.3329/bjsir.v58i4.66371","DOIUrl":"https://doi.org/10.3329/bjsir.v58i4.66371","url":null,"abstract":"Schiff base ligand of N, N′-bis isatin diamine was synthesized from various diamine and isatin through condensation reaction in 1:2 molar ratio. Mo(VI) complexes of isatin-diamines were synthesized by the reaction between the sodium molybdate dehydrate and N,N' bis isatin diamines with the reflux method. The synthesized ligand and complexes were characterized using spectroscopic techniques. The FT-IR band of azomethine group at 1600- 1610 cm-1 indicated the formation of the ligand. The UV-vis spectra clearly indicated that the prepared complex is a genuine Mo(VI) with d0 electronic configuration. The formation of a coordination bond was revealed by the downfield chemical shift of the complex in the NMR data as compared to the ligand. The UV results were corroborated by molar conductance data, which demonstrated their non-electrolytic character. The experimental evidence primarily supported the synthesis of both ligands and corresponding Mo(VI) complexes. Bangladesh J. Sci. Ind. Res. 58(4), 201-208, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"22 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139161507","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 : 2023-12-23DOI: 10.3329/bjsir.v58i4.65689
Sumon Chandra Debnath, N. Yeasmin, A. Siddika, M. Sultana, M. S. Bashar, M. Rahaman, Suravi Islam, S. Tabassum
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
太阳能是孟加拉国的未来能源之一，可以满足能源需求，并为可持续发展目标做出贡献。除了在家庭发电中使用太阳能系统外，其他一些部门也在灌溉、街道照明、抽水等方面使用光伏发电。本文介绍了太阳能光伏系统的其他一些应用理念。在这里，我们设计和制造了太阳能背包、农用帽子和割草机，以利用太阳能为存储系统充电，并可在日光下直接操作。太阳能充电背包在背包前端使用了一块容量为 5 W/17 V 的太阳能电池板，输出电压为 5 V，可为手机或充电电池充电。结果清楚地表明，它能够为手机充电，在阴天将手机放在阳光直射下，5 小时内手机的电量成功地从 22% 提高到了 88%。这篇文章还介绍了太阳能农用帽，对于我们的农民来说，它非常简单但却很有效。轻便的太阳能风扇（1.92 瓦/12 伏直流）置于帽子顶部，用于给农民的脸降温。该系统还配有照明（4 个超亮 3 V LED）和电池充电系统。此外，太阳能割草机的设计和开发主要是考虑到使用化石燃料造成的空气污染，它也是一种可用的太阳能设备。这些设备将继续为建立生态友好型系统发挥作用。孟加拉国科学与工业研究杂志》（Bangladesh J. Sci.58(4), 191-200, 2023
{"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}
Pub Date : 2023-12-23DOI: 10.3329/bjsir.v58i4.64335
Uzma Zafar, Muhammad Arif Bhatti, R. Mehmood
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
在本研究中，利用共沉淀法对硫酸锰进行碱氧化，成功地将从巴焦尔（巴基斯坦 KPK 省）锰矿中提取的硫酸锰用于化学合成氧化锰。这种生态友好型共沉淀法的优点包括制备快速简便、粒度控制简单，以及利用当地矿石进行合成具有成本效益。由于原料易得，反应条件可控，这种方法在工业中得到了广泛应用。扫描电子显微镜（SEM）和傅立叶变换红外光谱（FTIR）被用来表征合成氧化锰。傅立叶变换红外光谱（FTIR）显示，在纯氧化锰中，O-Mn-O 振动模式出现在波长 600 至 500 cm-1 之间。通过电离辐射 X 分析获得了化学成分，证实样品中含有锰和 O。对氧化锰沉淀条件进行了实验优化。研究结果表明，多种参数对产品产量有影响；前驱体比率和反应温度是最重要的变量，而反应时间和 pH 值对结晶质量的影响最大。Bangladesh J. Sci.58(4), 221-230, 2023
{"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}
Pub Date : 2023-09-25DOI: 10.3329/bjsir.v58i3.66374
Md Kabir Uddin, M Kamrul Alam Khan, MA Sobhan, Farruk Ahmed, MN Nabi
Attention to the utmost spectrum administration is to ease interference between different operators and to eliminate potential blockings possibility and occupy time slots for the spectrum users of wireless sensor networks. To stop the difficulties, the load countervail access (LCA) algorithm is a given idea that can simply resolve the reciprocal intervention. The effective and efficient practice of the attained frequency spectrum to be smooth and equal dispensation in a reallocation manner, given their specific QoS basics, is agile by the application (LCA). It lets us find the initially licensed spectrum which is unused and released as soon as required. The authors’ aim following the paper, is the total allocation of the estimated resources of the curse wireless spectrum among more intrusive operators that function in a similar comfortable zone of environment coverage to create equality with the given application (LCA) from the water-filling model. Bangladesh J. Sci. Ind. Res. 58(3), 173-178, 2023
{"title":"Load countervail access for spectrum management in wireless sensor networks following Industry 4.0","authors":"Md Kabir Uddin, M Kamrul Alam Khan, MA Sobhan, Farruk Ahmed, MN Nabi","doi":"10.3329/bjsir.v58i3.66374","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.66374","url":null,"abstract":"Attention to the utmost spectrum administration is to ease interference between different operators and to eliminate potential blockings possibility and occupy time slots for the spectrum users of wireless sensor networks. To stop the difficulties, the load countervail access (LCA) algorithm is a given idea that can simply resolve the reciprocal intervention. The effective and efficient practice of the attained frequency spectrum to be smooth and equal dispensation in a reallocation manner, given their specific QoS basics, is agile by the application (LCA). It lets us find the initially licensed spectrum which is unused and released as soon as required. The authors’ aim following the paper, is the total allocation of the estimated resources of the curse wireless spectrum among more intrusive operators that function in a similar comfortable zone of environment coverage to create equality with the given application (LCA) from the water-filling model. Bangladesh J. Sci. Ind. Res. 58(3), 173-178, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"24 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":"135865885","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 : 2023-09-25DOI: 10.3329/bjsir.v58i3.66934
S M Nasif Shams, Shamim Reza, Tanvir H Mojumder, Mohammad Abdul Matin
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
{"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}
Pub Date : 2023-09-25DOI: 10.3329/bjsir.v58i3.65550
S M Nasif Shams, Fahmida Sultana Priti, Arghya Saha, M Asif Haque
Induction method of cooking is extensively used for its high effectiveness and safe way of cooking. This paper provides presentation on design and implementation of a solar powered DC induction cooker.The energy from the sun is used as the power source of the cooker. When solar power is not available, the cooker can also be operated by battery. The design of the proposed induction cooker has been developed by modifying conventional AC induction cooker. The main purpose of this cooker is to serve the rural areas where electricity is not always available. Incremental conductance (IC) technique has been used as the procedure of the MPPT which confirms charging of battery by taking in maximum power from the PV panel and the proposed induction cooker will be operated by these batteries. Time taken for cooking different food items has been studied and it is observed that this induction cooker can serve the purpose of cooking for a small family satisfactorily. Bangladesh J. Sci. Ind. Res. 58(3), 135-142, 2023
{"title":"Power point tracker mounted solar powered DC induction cooker","authors":"S M Nasif Shams, Fahmida Sultana Priti, Arghya Saha, M Asif Haque","doi":"10.3329/bjsir.v58i3.65550","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.65550","url":null,"abstract":"Induction method of cooking is extensively used for its high effectiveness and safe way of cooking. This paper provides presentation on design and implementation of a solar powered DC induction cooker.The energy from the sun is used as the power source of the cooker. When solar power is not available, the cooker can also be operated by battery. The design of the proposed induction cooker has been developed by modifying conventional AC induction cooker. The main purpose of this cooker is to serve the rural areas where electricity is not always available. Incremental conductance (IC) technique has been used as the procedure of the MPPT which confirms charging of battery by taking in maximum power from the PV panel and the proposed induction cooker will be operated by these batteries. Time taken for cooking different food items has been studied and it is observed that this induction cooker can serve the purpose of cooking for a small family satisfactorily. Bangladesh J. Sci. Ind. Res. 58(3), 135-142, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"30 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":"135866047","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}
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
{"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}
Pub Date : 2023-09-25DOI: 10.3329/bjsir.v58i3.66797
Tapon Kumar Roy, A Sannal, S Akter, SMMS Tonmoy, T Chakrobarty, MR Hasan, MN Bari
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
{"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}
Pub Date : 2023-09-25DOI: 10.3329/bjsir.v58i3.65868
Nigar Sultana Nigar, Mohammad Mahbubur Rahman, Shamima Akther Eti
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
{"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}
Pub Date : 2023-09-25DOI: 10.3329/bjsir.v58i3.67491
M Seth, P Mondal, D Ghosh, SK Mukhopadhyay
Trimethylamine N-oxide (TMAO) is a diet-dependent molecule that causes atherosclerosis in human bodies. Elevated TMAO levels in the blood of type 2 diabetes and chronic renal disease patients have also been documented. This study examines trimethylamine (TMA) and TMAO levels in several edible mushrooms and marine fishes. According to the quantitative study, TMA and TMAO levels are high in the fish and mushroom samples. Although the examined marine fishes and mushrooms are considered nutritious and healthy, our data indicate that significant TMA/TMAO in those healthy foods may pose major health risks if ingested in excess. Bangladesh J. Sci. Ind. Res. 58(3), 187-190, 2023
{"title":"Excessive consumption of certain sea fishes and mushrooms may pose significant health risks","authors":"M Seth, P Mondal, D Ghosh, SK Mukhopadhyay","doi":"10.3329/bjsir.v58i3.67491","DOIUrl":"https://doi.org/10.3329/bjsir.v58i3.67491","url":null,"abstract":"Trimethylamine N-oxide (TMAO) is a diet-dependent molecule that causes atherosclerosis in human bodies. Elevated TMAO levels in the blood of type 2 diabetes and chronic renal disease patients have also been documented. This study examines trimethylamine (TMA) and TMAO levels in several edible mushrooms and marine fishes. According to the quantitative study, TMA and TMAO levels are high in the fish and mushroom samples. Although the examined marine fishes and mushrooms are considered nutritious and healthy, our data indicate that significant TMA/TMAO in those healthy foods may pose major health risks if ingested in excess. Bangladesh J. Sci. Ind. Res. 58(3), 187-190, 2023","PeriodicalId":8735,"journal":{"name":"Bangladesh Journal of Scientific and Industrial Research","volume":"12 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":"135768909","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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