JOURNAL OF SCIENTIFIC RESEARCH最新文献_第4页

Evaluation of Trimethoprim Drug as a Green Corrosion Inhibitor for Mild Steel in 1.0 M Sulfuric Acid 甲氧苄啶在1.0 M硫酸中作为绿色缓蚀剂对低碳钢的腐蚀评价

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.59596

P. Kamble, R. Dubey, J. Girase

引用次数: 0

The Study of Kinetics and Isotherms of Methylene Blue Adsorption onto Activated Carbon-Loaded Cellulose Composite Bead 活性炭负载纤维素复合球吸附亚甲基蓝的动力学及等温线研究

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.60717

P. Sarkar

{"title":"The Study of Kinetics and Isotherms of Methylene Blue Adsorption onto Activated Carbon-Loaded Cellulose Composite Bead","authors":"P. Sarkar","doi":"10.3329/jsr.v15i1.60717","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.60717","url":null,"abstract":"A novel adsorbent-activated carbon-loaded cellulose composite bead (AC-CCB) was synthesized by sol-gel conversion for the removal of methylene blue (MB) from an aqueous solution. The adsorbent was characterized by Fourier transform-infrared spectroscopy (FT-IR), field emission scanning electron microscope (FESEM), and X-ray energy dispersive spectroscopy (EDAX). The maximum dye removal was found to be 96.5, 92.3, and 81.8 %, corresponding to MB concentrations of 25, 50, and 100 mgL-1, respectively. Isotherm and the kinetic study were carried out with an AC-CCB dose of 1.0 g L-1, a shaking speed of 125 rpm, and the initial MB concentration ranging from 25-100 mg L-1. In order to study the kinetics of MB adsorption onto AC-CCB, the temperature was fixed at 298 K, whereas, for the isotherm study, the temperature varied from 298 to 318 K. The process followed pseudo-second-order kinetics with rate constant (k2) 28.7x10-2, 11.1x10-2 and 9.41x10-2 g.mg.min-1 corresponding to MB concentration of 25, 50 and 100 mg L-1. Freundlich, Langmuir, and Sips models were found to fit well with the adsorption data. The negative values and the positive values suggested that the adsorption of MB onto AC-CCB was spontaneous and endothermic.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"72 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83128276","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

Gelation of an Organically Crosslinked PHPA Polymer Gel System: An Experimental Study 有机交联PHPA聚合物凝胶体系凝胶化的实验研究

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.60039

M. Vaishnav, N. Verma

{"title":"Gelation of an Organically Crosslinked PHPA Polymer Gel System: An Experimental Study","authors":"M. Vaishnav, N. Verma","doi":"10.3329/jsr.v15i1.60039","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.60039","url":null,"abstract":"Excessive water production in the oil field is the major difficulty in production for the petroleum industry. Remedial techniques need to be applied to control this excess water production considering the health, safety, and environmental issues and improve the reservoir's economic and productive life. In this study polymer gel system comprising the polymer partially hydrolyzed polyacrylamide (PHPA) and organic cross-linkers (Hydroquinone and Hexamethylene tetramine) were prepared as a water shut-off system to control the excessive production of water in the oil field. The effect of various parameters such as temperature, pH, cross-linker concentration, degree of hydrolysis, and divalent cations on gelation time was investigated using the bottle testing method. The importance of retarders at high temperatures was also evaluated. The gelation temperature was varied from 90 °C to 120 °C to study the effect of different parameters on the gelation time and gel behavior. This study suggests that Partially Hydrolyzed Polyacrylamide (PHPA) with organic cross-linkers can be an effective polymer gel system for water shut-off operations, and with the addition of retarders at high temperature to control gelation time, the performance of the gel can be improved.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89574056","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

Copper Doped PPy/MWCNT Nanocomposite Materials for Supercapacitor Applications 超级电容器用掺杂铜的PPy/MWCNT纳米复合材料

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.59397

M. Priyadarsini, M. Adhikary, P. Jena, R. M. Pujahari

{"title":"Copper Doped PPy/MWCNT Nanocomposite Materials for Supercapacitor Applications","authors":"M. Priyadarsini, M. Adhikary, P. Jena, R. M. Pujahari","doi":"10.3329/jsr.v15i1.59397","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.59397","url":null,"abstract":"We report the structural, morphological, and electrochemical properties of polypyrrole (PPy), copper doped PPy (Cu/PPy), and copper doped polypyrrole multi-walled carbon nanotubes (Cu/PPy/MWCTs) prepared by oxidative polymerization technique. The incorporation of Cu in the form of nanoparticles in the composites was confirmed from XRD data. The granular morphology of PPy was observed from the FESEM micrograph. However, the size of the grains was decreased with Cu nanoparticle insertion in the matrix. The uniform distribution of Cu nanoparticles in the Cu/PPy and Cu/PPy/MWCTs nanocomposites has been evidenced from TEM images. The highest specific capacitance of 311 F/g at a scan rate of 10 mV/s is achieved in the case of Cu/PPy/MWCTs composite. It is found that the cyclic stability of these nanocomposites is enhanced due to the integration of MWCNTS and Cu nanoparticles with PPy polymer. The Cu/PPy/MWCNTs nanocomposites retained 91% of their specific capacitance even after 1000 cycles. The maximum energy density of 19.89 Wh/kg and maximum power density of 4479.71 W/kg at the scan rate of 200 mV/s were also measured for the Cu/PPy/MWCNTs nanocomposite. Our study thus indicates that the prepared Cu/PPy/MWCTs nanocomposite could be a potential candidate for application in supercapacitor and hybrid type storing devices.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77397727","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

Effects of Nationwide Lockdown due to COVID-19 on Ambient Air Quality in the State of West Bengal, India 新冠肺炎对印度西孟加拉邦环境空气质量的影响

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.59249

B. Ghosh, S. Nayek, P. Padhy

{"title":"Effects of Nationwide Lockdown due to COVID-19 on Ambient Air Quality in the State of West Bengal, India","authors":"B. Ghosh, S. Nayek, P. Padhy","doi":"10.3329/jsr.v15i1.59249","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.59249","url":null,"abstract":"The present study assessed the nationwide lockdown impacts on the air pollution situation across West Bengal, India. Air pollution data was collected from the online monitoring stations of the Central Pollution Control Board across West Bengal. The gradual declining pattern of overall pollution status was observed during the lockdown phase from the pre-lockdown phase. The early unlocking stage found slow and gradual increasing air pollution levels. Siliguri’s pre-lockdown ‘poor’ Air Quality Index (AQI) improved in the lockdown phase to ‘satisfactory’ level. ‘Moderate’ level AQI in Asansol of the pre-lockdown stage improved to ‘satisfactory’ level during the lockdown phase. Pre-lockdown AQI of both Kolkata and Howrah changed from ‘moderate’ to ‘good’ level during the lockdown phase. Unlike other pollutants, the ozone level increased in Kolkata, Howrah, and Siliguri in the lockdown phase. The early monsoonal washout possibly caused the changes in the pattern of pollution status of specified periods in the 2019 and 2020. Thus, in the study period of lockdown in 2020, the decrease in pollution level may not only caused by the stoppage of vehicles or industry but also have a possible natural influence.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88181990","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

Dielectric Spectroscopy of Ferroelectric Crossbred PVDF–TiO2 Polymer Composite Thin Films 铁电交联PVDF-TiO2聚合物复合薄膜的介电光谱

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.60132

A. Arshad, S. Dani, S. S. Kulkarni, U. V. Khadke

{"title":"Dielectric Spectroscopy of Ferroelectric Crossbred PVDF–TiO2 Polymer Composite Thin Films","authors":"A. Arshad, S. Dani, S. S. Kulkarni, U. V. Khadke","doi":"10.3329/jsr.v15i1.60132","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.60132","url":null,"abstract":"Polyvinylidene fluoride (PVDF) ferroelectric polymer blend with titanium dioxide (TiO2) is synthesized in the form of thin films by solution casting method. The synthesized PVDF-TiO2 composite films with a different wt% of TiO2 (2, 4, 6, 8, and 10) as fillers in the PVDF matrix were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM) and Fourier Transform Infrared (FTIR) spectroscopy. The XRD patterns of PVDF-TiO2 composite films confirmed the existence of a β-phase PVDF, uniform distribution of TiO2 particles in the polymer matrix and the crystallinity of the polymer composites was found to be enhanced. The SEM micrograph depicts the augmentation in the structural density due to the addition of TiO2 particles in the PVDF matrix. The dielectric constant of the PVDF-TiO2films is found to be an anomaly at lower frequencies and decreases with an increase in frequency agreeing with the Maxwell–Wagner type of interfacial polarization. The enhancement in the dielectric constant of PVDF-TiO2 composites at lower frequencies suggests that the prepared polymer composite thin films are useful as separator membranes in energy storage devices.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88865021","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

Solution of Linear Volterra Integral Equation of Second Kind via Rishi Transform 利用Rishi变换求解第二类线性Volterra积分方程

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.60337

S. Aggarwal, R. Kumar, J. Chandel

引用次数: 0

Optimization of M/M/2 Queueing Model with Working Vacations 带工作假期的M/M/2排队模型优化

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.59348

S. Gupta, P. Joshi, K. Rajeshwari

引用次数: 0

Prevalence and Risk Factors Associated with Chronic Diseases Among Young Adult in Bangladesh 孟加拉国青年慢性疾病的患病率和相关风险因素

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.60328

M. Hasan

{"title":"Prevalence and Risk Factors Associated with Chronic Diseases Among Young Adult in Bangladesh","authors":"M. Hasan","doi":"10.3329/jsr.v15i1.60328","DOIUrl":"https://doi.org/10.3329/jsr.v15i1.60328","url":null,"abstract":"One of the major health challenges of the century is the prevalence of chronic diseases in young adults. The aim of the study was to identify the risk factors for chronic disease and the prevalence of chronic disease in individuals aged 18 to 39. The outcome variable was chronic diseases, and potential predictors included sex, age, education, work status, division, region, smoking status, and respondent's income. Of the 5490 young people, 1782 (32.5 %) had at least one chronic illness. Age, work status, division, geography, and smoking status were significant predictors of chronic illnesses in the multivariate model. Compared to younger young adults, those aged 30-39 had greater odds of developing chronic diseases (OR = 1.57, 95 % CI: 1.16–2.13). Residents in socioeconomically disadvantaged areas are more likely to have chronic illnesses than their more affluent counterparts. Young men are more likely than women to experience chronic illness (OR = 1.06, 95 % CI: 0.92-1.21), although this difference wasn't statistically significant. The highly educated group reports chronic disease more frequently than other groups. These findings, particularly those pertaining to decision-makers, can aid in the justification, direction, and support of programs required to address these altering epidemiological trends.","PeriodicalId":16984,"journal":{"name":"JOURNAL OF SCIENTIFIC RESEARCH","volume":"238 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72664695","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

Enhanced Anticarcinogenic and Antimicrobial Response of Synthesized Tungsten Oxide Nanoparticles 合成氧化钨纳米颗粒增强的抗癌和抗菌作用

JOURNAL OF SCIENTIFIC RESEARCH Pub Date : 2023-01-01 DOI: 10.3329/jsr.v15i1.58211

J. Kumari, P. Mangala

引用次数: 0