Chemical Industry & Chemical Engineering Quarterly最新文献_第9页

Chemical engineering methods in analyses of 3D cancer cell cultures: Hydrodinamic and mass transport considerations 化学工程方法在分析三维癌细胞培养:流体力学和质量运输的考虑

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq210607033r

M. Radonjic, J. Petrovic, M. Milivojevic, M. Stevanović, Jasmina Stojkovska, B. Obradovic

{"title":"Chemical engineering methods in analyses of 3D cancer cell cultures: Hydrodinamic and mass transport considerations","authors":"M. Radonjic, J. Petrovic, M. Milivojevic, M. Stevanović, Jasmina Stojkovska, B. Obradovic","doi":"10.2298/ciceq210607033r","DOIUrl":"https://doi.org/10.2298/ciceq210607033r","url":null,"abstract":"A multidisciplinary approach based on experiments and mathematical modeling was used in biomimetic system development for three-dimensional (3D) cultures of cancer cells. Specifically, two cancer cell lines, human embryonic teratocarcinoma NT2/D1 and rat glioma C6, were immobilized in alginate microbeads and microfibers, respectively, and cultured under static and flow conditions in perfusion bioreactors, while chemical engineering methods were applied to explain the obtained results. The superficial medium velocity of 80 mm s-1 induced lower viability of NT2/D1 cells in superficial microbead zones implying adverse effects of fluid shear stresses estimated as ~67 mPa. On the contrary, similar velocity (100 mm s-1) enhanced proliferation of C6 glioma cells within microfibers as compared to static controls. An additional study of silver release from nanocomposite Ag/honey/alginate microfibers under perfusion indicated that medium partially flows through the hydrogel (interstitial velocity of ~10 nm s-1). Thus, a diffusion-advection-reaction model was applied to describe the mass transport to immobilized cells within microfibers. Substances with diffusion coefficients of ?10-9-10-11 m2 s-1 are sufficiently supplied by diffusion only, while those with significantly lower diffusivities (?10-19 m2 s-1) require additional convective transport. The present study demonstrates the selection and contribution of chemical engineering methods in tumor model system development.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68462420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Pine cones powder for the adsorptive removal of copper ions from water 松果粉用于吸附去除水中的铜离子

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ200101001O

R. Ouafi, A. Omor, Y. Gaga, M. Akhazzane, M. Taleb, Z. Rais

{"title":"Pine cones powder for the adsorptive removal of copper ions from water","authors":"R. Ouafi, A. Omor, Y. Gaga, M. Akhazzane, M. Taleb, Z. Rais","doi":"10.2298/CICEQ200101001O","DOIUrl":"https://doi.org/10.2298/CICEQ200101001O","url":null,"abstract":"This research investigates the adsorption potential of pine cones powder (PCP) for the removal of copper ions (Cu(II)) from aqueous solutions. The process of adsorption was reasonably fast to be completed within a time of 60 min. The pseudo-second order kinetic model describes properly the Cu(II) adsorption by PCP. The adsorbent was characterised by various instrumental techniques and batch experiments were conducted to investigate the effect of PCP dose, solution pH, particle size and initial Cu(II) concentration on adsorption efficiency. Optimum Cu(II) removal occurred at a slightly acidic pH, with a particle size less than 100 ?m. The effective PCP dose was estimated to be 36 g.L-1. The increase in the initial concentration of Cu (II) was accompanied by a reduction in the rate of its reduction by almost half. The Langmuir model was the best fitting isotherm with a maximum adsorption capacity of 9.08 mg.g-1. The thermodynamic parameters values showed that the Cu(II) adsorption was a spontaneous and endothermic process. The results of this research suggest that Cu(II) could be removed through an environmentally friendly process using PCP as low-cost natural wastes.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68460435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Studies on thermophysical property variations of graphene nanoparticle suspended ethylene glycol/water 纳米石墨烯悬浮乙二醇/水的热物性变化研究

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq200504036p

M. P. Srinivasan, R. Baskar

{"title":"Studies on thermophysical property variations of graphene nanoparticle suspended ethylene glycol/water","authors":"M. P. Srinivasan, R. Baskar","doi":"10.2298/ciceq200504036p","DOIUrl":"https://doi.org/10.2298/ciceq200504036p","url":null,"abstract":"The objective of the study is to determine the thermophysical property variations (such as viscosity, density, specific heat capacity and thermal conductivity) of graphene suspended base fluid (ethylene glycol (EG)/water (W)), with respect to graphene nanoparticle concentration and hot fluid inlet temperature. Graphene nanoparticle concentrations (0.2, 0.4, 0.6, 0.8 and 1 vol.%) and the base fluid of 30:70 vol.% of EG: Water is prepared initially. The impact of graphene nanoparticle addition on base fluids based on experimentation in the commercial plate heat exchanger was studied. In this experiment, the hot fluid inlet temperature was varied at 55, 65 and 75 ?C. The experimental results of thermophysical properties were compared with the selected models proposed in the literature. Einstein (1956), Kitano (1981) and Bachelor models (1977) have been used to consider the effect of viscosity. The measured density and specific heat capacity were validated with Pak and Cho and Xuan models, respectively. To consider the effect of thermal conductivity, three different models (Maxwell (1954), Vajjah (2010) and Sahoo (2012)) have been used. Study revealed that the thermophysical properties of base fluid significantly affect the graphene nanoparticle suspension.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68460510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Preparation and characterization of PVA-SiO2 nanocomposite membranes for seawater desalination by pervaporation 渗透蒸发海水淡化用PVA-SiO2纳米复合膜的制备与表征

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq200505037t

B. Tirnakci, Y. Salt

引用次数: 5

Microstructure and fracture mode of unalloyed dual phase austempered ductile iron 非合金化双相等温球铁的显微组织及断裂方式

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq201222027j

P. Janjatović, C. Eric, D. Rajnović, S. Baloš, V. Grabulov, L. Šidjanin

{"title":"Microstructure and fracture mode of unalloyed dual phase austempered ductile iron","authors":"P. Janjatović, C. Eric, D. Rajnović, S. Baloš, V. Grabulov, L. Šidjanin","doi":"10.2298/ciceq201222027j","DOIUrl":"https://doi.org/10.2298/ciceq201222027j","url":null,"abstract":"Dual phase ADI material microstructure consists of different amounts and morphologies of ausferrite and free ferrite, obtained by subjecting ductile iron to specific heat treatment. As such, its strength is lower compared to comparable ADI materials, but exhibiting a higher ductility, the major disadvantage of ADI. In the current study, an unalloyed ductile iron was intercritical austenitised in two-phase regions (?+?) at four temperatures from 840 to 780?C for 2 hours and austempered at 400?C for 1 hour to obtain dual phase ADI with different percentages of free ferrite and ausferrite. Metallographic and fracture studies were performed by light and scanning electron microscopy, respectively. Microscopy results were correlated to tensile testing results. The results indicated that, as the amount of ausferrite present in the matrix increases, higher values of strength and lower ductility are obtained. The fracture surfaces of dual phase ADI microstructures with 22.8% of ausferrite in their matrix have regions of quasi-cleavage fracture around last-to-freeze zones, related to the presence of ausferrite in those areas. The specimens with the highest values of ausferrite of 86.8% among the dual phase microstructure have a dominant quasi-cleavage type of fracture.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461541","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Influence of graphene nano-platelets dispersion on the thermo-physical properties of sunflower oil 石墨烯纳米薄片分散对葵花籽油热物性的影响

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ210101018B

J. Bensam, M. Muthuraj

引用次数: 0

Rational feeding strategies of substrate and enzymes to enzymatic hydrolysis bioreactors 酶解生物反应器中底物和酶的合理投料策略

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq201202030p

Bruna Pratto, Martha Suzana Rodrigues dos Santos-Rocha, Gustavo E. A. P. A. Batista, I. Cavalcanti-Montaño, Carlos Alberto Suarez Galeano, Antonio José Gonçalves da Cruz, R. de Sousa

{"title":"Rational feeding strategies of substrate and enzymes to enzymatic hydrolysis bioreactors","authors":"Bruna Pratto, Martha Suzana Rodrigues dos Santos-Rocha, Gustavo E. A. P. A. Batista, I. Cavalcanti-Montaño, Carlos Alberto Suarez Galeano, Antonio José Gonçalves da Cruz, R. de Sousa","doi":"10.2298/ciceq201202030p","DOIUrl":"https://doi.org/10.2298/ciceq201202030p","url":null,"abstract":"Bioreactors operating in fed-batch mode improve the enzymatic hydrolysis productivity at high biomass loadings. The present work aimed to apply rational feeding strategies of substrates (pretreated sugarcane straw) and enzymes (CellicCtec2?) to achieve sugar titers at industrial levels. The instantaneous substrate concentration was kept constant at 5 % (w/v) along the fed-batch, and the enzyme dosage inside the bioreactor was adjusted so that the reaction rate was not less than a pre-defined value (a percentage of the initial reaction rate - rmin). When r reached values below rmin, enzyme pulses were applied to return the reaction rate to its initial value (r0). The optimized feeding policy indicated a reaction rate maintained at a minimum of 70 % of r0, based on the trade-off between glucose productivity and enzyme saving. Initially, it was possible to process a total of 21 % (w/v) solid load, achieving 160 g/L of glucose concentration and 80 % of glucose yield. It was verified that non-productive enzyme adsorption was the main reason for some reduction of hydrolysis yield regarding the theoretical cellulose-to-glucose conversion. An increment of 30 g/L in the final glucose concentration was achieved when a lignin-blocking additive (soybean protein) was used in the enzymatic hydrolysis.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Oxidation of cycloalkene using supported ruthenium catalysts under solvent-free conditions 无溶剂条件下负载钌催化剂氧化环烯烃

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ210304020A

Raiedhah Alsaiari Abdullah

引用次数: 0

Circular economy in apple processing industry: Biodiesel production from waste apple seeds 苹果加工业的循环经济:利用苹果废籽生产生物柴油

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/ciceq210819035t

Marija B. Tasic, M. Stanković, Milan Kostic, Olivera S. Stamenković, V. Veljković

引用次数: 3

Novel allyl-ester-based polymers as flow improvers for waxy crude oil 新型烯丙基酯基聚合物作为含蜡原油流动改进剂

IF 1.2 4区工程技术

Chemical Industry & Chemical Engineering Quarterly Pub Date : 2021-01-01 DOI: 10.2298/CICEQ201011008A

A. Ashmawy, El-Sayed Elnaggar, M. Mohamed, Mohamed Hamam

{"title":"Novel allyl-ester-based polymers as flow improvers for waxy crude oil","authors":"A. Ashmawy, El-Sayed Elnaggar, M. Mohamed, Mohamed Hamam","doi":"10.2298/CICEQ201011008A","DOIUrl":"https://doi.org/10.2298/CICEQ201011008A","url":null,"abstract":"The deposition of paraffin wax from crude oil at low temperatures due to wax deposition, high pour point, high viscosity, and weak flow capability is among the critical and persisting challenges faced by the petroleum industry. In this study, a new para-decyloxy allyl benzoate (I10) was prepared, polymerized into HI10, and copolymerized with dioctadecyl maleate into MHI10 via the free-radical polymerization method employing azobisisobutyronitrile and toluene as the initiator and solvent, respectively. The prepared monomer was characterized by spectroscopic analyses (Fourier-transform infrared (FT-IR)) and proton nuclear magnetic resonance. Further, the polymers were characterized by FT-IR, and their average molecular weights were determined by gel permeation chromatography. The prepared compounds were taken in different concentrations and then tested as flow improvers of Qarun waxy crude oil using pour point depression and rheological parameters. The results of this test indicated that MHI10 exerted the highest effect on pour point reduction and the rheological parameters (yield value and apparent viscosity). Moreover, an increase in the efficiency of the additives was observed after increasing their concentration from 1000 to 5000 ppm.","PeriodicalId":9716,"journal":{"name":"Chemical Industry & Chemical Engineering Quarterly","volume":null,"pages":null},"PeriodicalIF":1.2,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68461041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1