The Open Chemical Engineering Journal最新文献_第2页

Computational Simulation of Atherosclerosis Progression Associated with Blood Pressure in a 2-D Idealized Human Carotid Artery Model 二维理想人类颈动脉模型中与血压相关的动脉粥样硬化进展的计算模拟

The Open Chemical Engineering Journal Pub Date : 2022-07-21 DOI: 10.2174/18741231-v16-e2205260

E. Alagbe, T. E. Amoo, A. O. Ayeni, Oluwakayode S. Oyedele, Vershima D. Ashiekaa

{"title":"Computational Simulation of Atherosclerosis Progression Associated with Blood Pressure in a 2-D Idealized Human Carotid Artery Model","authors":"E. Alagbe, T. E. Amoo, A. O. Ayeni, Oluwakayode S. Oyedele, Vershima D. Ashiekaa","doi":"10.2174/18741231-v16-e2205260","DOIUrl":"https://doi.org/10.2174/18741231-v16-e2205260","url":null,"abstract":"\u0000 \u0000 Cardiovascular diseases are a known health threat with no respect for age. The need to understand the initiation and progress of the disease is expedient in proper diagnosis and management of the disease.\u0000 \u0000 \u0000 \u0000 The work is targeted at simulating the effect of elevated blood pressure on the initiation and development of plaque over time concerning wall shear stress, WSS and plaque wall stress, and PWS.\u0000 \u0000 \u0000 \u0000 Conditions such as blood velocity, pressure, and arterial wall conditions associated with blood flow in arteries, as well as patient-specific characterization related to these variables and conditions, were plugged into modified models in the COMSOL multiphysics software. The artery was modeled as an idealized 2-D carotid artery model.\u0000 \u0000 \u0000 \u0000 Results showed that the WSS distribution with respect to changes with a blood pressure of 500 Pa gave the highest WSS value at the plaque neck and 1500 Pa gave the highest WSS value in the regions close to the plaque root. It was also observed that as the plaque size increased, the region experiencing severely high values for WSS also expanded.\u0000 \u0000 \u0000 \u0000 It can be recommended that blood pressure monitoring is necessary to curb the attendant cardiovascular diseases associated with high blood pressure.\u0000","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"34 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75378610","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

A Review on CO2 Absorption using Chemical Solvents at Low and High CO2 Partial Pressure Conditions in a Packed Column 填料塔中低、高CO2分压条件下化学溶剂吸收CO2的研究进展

The Open Chemical Engineering Journal Pub Date : 2022-06-21 DOI: 10.2174/18741231-v16-e2204140

H. Halim, V. Rajiman, A. Shariff

{"title":"A Review on CO2 Absorption using Chemical Solvents at Low and High CO2 Partial Pressure Conditions in a Packed Column","authors":"H. Halim, V. Rajiman, A. Shariff","doi":"10.2174/18741231-v16-e2204140","DOIUrl":"https://doi.org/10.2174/18741231-v16-e2204140","url":null,"abstract":"CO2 removal is important for industrial flue gas treatment, biogas enhancement, and natural gas (NG) processing applications. Chemical absorption using an amine-based solvent is a proven technology for CO2 removal from various gases. In recent years, various promising amine solvents have been investigated, either as single or blended solutions, to enhance the CO2 absorption process at low and high CO2 partial pressure conditions. Low CO2 partial pressures (1 – 47 kPa) have been utilized in numerous research works focusing on flue gas treatment and biogas enhancement applications. On the other hand, high CO2 partial pressures were instead applied in NG processing ranging between 750 and 1600 kPa. To provide more insight into the current trends, existing research on CO2 absorption in amine-based solvents is presented in this review focusing on absorption performance in a packed column at low and high CO2 partial pressures. Reports on the effect of different parameters, namely CO2 partial pressure, gas, and liquid flow rates, amine concentrations, and liquid temperature, on the removal of CO2 in the packed column are included. Based on the review, the future direction is further highlighted in this area.","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84500708","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

Water Absorption Enhancement of Sodium Poly Acrylate and Poly(2-Acrylamido-2-Methylpropane Sulphonic Acid) Based Hydrogel Mixtures 聚丙烯酸钠和聚(2-丙烯酰胺-2-甲基丙烷磺酸)基水凝胶混合物的吸水性增强

The Open Chemical Engineering Journal Pub Date : 2021-12-24 DOI: 10.2174/1874123102115010049

Sohair A. Darwish, I. Ibrahim, N. Mostafa, M. Radwan, M. A. Sadek, Hany A. Elazab

{"title":"Water Absorption Enhancement of Sodium Poly Acrylate and Poly(2-Acrylamido-2-Methylpropane Sulphonic Acid) Based Hydrogel Mixtures","authors":"Sohair A. Darwish, I. Ibrahim, N. Mostafa, M. Radwan, M. A. Sadek, Hany A. Elazab","doi":"10.2174/1874123102115010049","DOIUrl":"https://doi.org/10.2174/1874123102115010049","url":null,"abstract":"\u0000 \u0000 Hydrogels are hydrophilic polymers which are cross-linked to form three-dimensional structures, which can absorb, swell and retain huge amounts\u0000of water or aqueous fluids.\u0000 \u0000 \u0000 \u0000 \u0000This paper reports the preparation and characterisation of Poly(2-Acrylamido-2-Methylpropane Sulphonic Acid) (PAMPS) hydrogel with different\u0000crosslinking intensities.\u0000\u0000 \u0000 \u0000 \u0000 \u00002-Acrylamido-2-methylpropane sulfonic acid (AMPS)\u0000monomer was purchased from Alfa Aesar Company as reagent\u0000grade. It was used as received (>98% purity) without any\u0000further purification.\u0000 \u0000PAMPS hydrogel was prepared by free radical crosslinking\u0000solution polymerization of AMPS in water at room\u0000temperature under a nitrogen blanket in cylindrical glass tubes.\u0000The characteristics of the obtained PAMPS hydrogel were compared with those of commercial sodium polyacrylates\u0000hydrogel. \u0000\u0000 \u0000 \u0000 \u0000 It was found that decreasing the crosslinker weight improved the absorbance capacity but to a limit. The suggested reasons were\u0000discussed. The mixture showed higher absorbance rate than PAMPS, and bigger absorbance capacity than sodium polyacrylates.\u0000\u0000 \u0000 \u0000 \u0000 This paper investigates the effect of crosslinker ratio on the\u0000swelling capacity of PAMPS. It was found that as the\u0000crosslinking ratio decreases, the porosity of the hydrogel\u0000increases, thus improving the swelling capacity.\u0000\u0000","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75480738","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

Neutralizing Aminesin Boiler Steam and Humidified Indoor Air 中和锅炉蒸汽和加湿室内空气中的胺

The Open Chemical Engineering Journal Pub Date : 2021-12-24 DOI: 10.2174/1874123102115010041

A. Gomes, Ye Tao, A. Bhuiyan, Dongjie Guan, F. Memarzadeh

{"title":"Neutralizing Aminesin Boiler Steam and Humidified Indoor Air","authors":"A. Gomes, Ye Tao, A. Bhuiyan, Dongjie Guan, F. Memarzadeh","doi":"10.2174/1874123102115010041","DOIUrl":"https://doi.org/10.2174/1874123102115010041","url":null,"abstract":"\u0000 \u0000 The health and comfort of the indoor population have been impacted by the humidity. While people are increasingly spending more time indoors, the presence of pollutants and lack of proper humidification in indoor air have significant risk factors that may lead to multiple health problems.\u0000 \u0000 \u0000 \u0000 By applying the right air purification and/or humidification system, the adverse effects of poor indoor air quality can be minimized. Direct steam addition is a common technique to humidify the indoor air of a building. Carbon dioxide or other acidic process contaminants may dissolve in steam or steam condensate that will consequently decrease the pH and make it corrosive for the steam distribution system. To avoid that, neutralizing amines are added to steam that keeps the pH neutral or slightly alkaline(pH 7.5-9.0). However, neutralizing amines have some toxic effects. OSHA, FDA, and NIOSH prescribe maximum concentration limits for them in indoor air. The Central Utility Plant (CUP) of National Institutes of Health (NIH) uses a 50:50 blend of cyclohexylamine and diethylaminoethanol as neutralizing agents for the steam.\u0000 \u0000 \u0000 \u0000 The CUP at NIH presents the results of monitoring the concentration level of amines through mass balance, online monitoring at specified location of the steam distribution system and field measurement in humidified indoor air at buildings on campus.\u0000 \u0000 \u0000 \u0000 Through theoretical calculation backed up by field measurement, the amine concentration of indoor air is determined to be well below the FDA regulated limits.\u0000","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-12-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89576024","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

Fast and Facile Voltammetric Detection of Acetaminophen at Poly (DL-phenylalanine) Modified Dysprosium-Copper Oxide Nanoparticle/Carbon Composite Paste Electrode 聚(dl -苯丙氨酸)修饰的氧化镝纳米颗粒/碳复合浆料电极上对乙酰氨基酚的快速简便伏安检测

The Open Chemical Engineering Journal Pub Date : 2021-11-17 DOI: 10.2174/1874123102115010031

Shankar A. Itagi, J. G. Manjunatha, M. M. Charithra, P. Mallu, S. Sandeep, C. S. Karthik, Girish Tigari, Donnankatte N. Varun

{"title":"Fast and Facile Voltammetric Detection of Acetaminophen at Poly (DL-phenylalanine) Modified Dysprosium-Copper Oxide Nanoparticle/Carbon Composite Paste Electrode","authors":"Shankar A. Itagi, J. G. Manjunatha, M. M. Charithra, P. Mallu, S. Sandeep, C. S. Karthik, Girish Tigari, Donnankatte N. Varun","doi":"10.2174/1874123102115010031","DOIUrl":"https://doi.org/10.2174/1874123102115010031","url":null,"abstract":"\u0000 \u0000 The voltammetric sensing of Acetaminophen (AN) using modified Dysprosium Copper Oxide (DyCuO) Nanoparticles (NP) mixed Carbon Paste Electrode (MCPE) was successfully developed.\u0000 \u0000 \u0000 \u0000 The modification of bare NPMCPE was achieved by the polymerisation of DL-Phenylalanine (DLPA). The electroanalysis of the AN was achieved by utilizing the Cyclic voltammetry (CV) approaches. The crystallographic nature of the nanoparticle was studied via X-ray Powder Diffraction (XRD) technique. The surface morphology and electrochemical feature of the prepared electrode were evaluated by Field Emission Scanning Electron Microscopy (FE-SEM) and Electrochemical Impedance Spectroscopy (EIS) techniques.\u0000 \u0000 \u0000 \u0000 The modified sensor exhibited an excellent electrocatalytic activity towards the electroanalysis of the AN. Several aspects, such as the number of polymerisation cycles, variation of pH, and the impact of scan rate were investigated in 0.2 M supporting electrolyte (pH 7) at a sweep rate of 0.1 Vs-1. The suggested sensor shows a very low detection limit (11.95×10-8 M) with a linear range of 2.0 to 50.0 µM, which exhibits excellent sensitivity.\u0000 \u0000 \u0000 \u0000 The stable and reusable sensor was applied for the estimation of AN in the tablet sample. Thus, P(DLPA)MNPMCPE was utilized as the most capable sensor for the voltammetric detection of AN.\u0000","PeriodicalId":22933,"journal":{"name":"The Open Chemical Engineering Journal","volume":"02 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79908335","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

Application Of Seeding Crystallization as a Pre-Treatment Stage for The Reduction of Scaling Tendency of Seawater Feed to Thermal Desalination Units 种子结晶作为预处理阶段在热淡化装置中降低海水进料结垢倾向的应用

The Open Chemical Engineering Journal Pub Date : 2021-01-01 DOI: 10.2174/1874123102115010010

Mazen N. Al-Amaireh

引用次数: 0

Potential Evaluation of PVDF/PAN Membranes for Separation of Oil from Industrial Waste PVDF/PAN膜分离工业废油的潜力评价

The Open Chemical Engineering Journal Pub Date : 2021-01-01 DOI: 10.2174/1874123102115010018

J. Mehta, D. Panwar, A. Metre, M. S. Bhakhar

引用次数: 1

Electrochemical Fabrication of Poly (niacin) Modified Graphite Paste Electrode and its Application for the Detection of Riboflavin 聚烟酸修饰石墨糊电极的电化学制备及其在核黄素检测中的应用

The Open Chemical Engineering Journal Pub Date : 2020-12-31 DOI: 10.2174/1874123102014010090

J. G. Manjunatha, C. Raril, Hareesha Nagarajappa, M. M. Charithra, P. A. Pushpanjali, Girish Tigari, D. Ravishankar, S. C. Mallappaji, J. Gowda

引用次数: 10

Heat Transfer Modeling in Bone Tumour Hyperthermia Induced by Hydroxyapatite Magnetic Thermo-Seeds 羟基磷灰石磁性热种子诱导骨肿瘤热疗的传热模型

The Open Chemical Engineering Journal Pub Date : 2020-11-20 DOI: 10.2174/1874123102014010077

F. Fanari, L. Mariani, F. Desogus

引用次数: 1

Drying of Banana-Stepwise Effect in Drying Air Temperature on Drying Kinetics 香蕉干燥——干燥空气温度对干燥动力学的逐级影响

The Open Chemical Engineering Journal Pub Date : 2020-08-24 DOI: 10.2174/1874123102014010071

J. Mehta, D. Panwar, Smit Ghardesia, Atik Chauhan, Virajsinh V. Atodariya, Bannishikha Banerjee, A. Metre, M. S. Bhakhar

引用次数: 2