Pub Date : 2020-10-13DOI: 10.14710/reaktor.20.3.150-158
A. Prasetyaningrum, A. F. A. Raemas, N. Rokhati, B. Jos
The hydrogel is superabsorbent polymers (SAP) that are biodegradable and can be obtained from polysaccharides, lipids, and proteins. Polysaccharides include cellulose, starch and their derivatives, seaweed extracts such as carrageenan, alginate, pectin, and chitosan. Carrageenan is the result of the extraction of red seaweed sap with an alkaline solution. The main objective of this study was to simultaneously increase the strength and properties of κ-carrageenan SAP film with the addition of glyoxal and acrylamide as crosslinkers. The addition of acrylamide (variated from 1 to 7 % b/v) into the k-Carrageenan based SAP hydrogel compound and the presence of glyoxal as crosslink agent (variated from 0 to 1,0 % v/v). The physical properties of the SAP films were analyze using swelling degree and tensile strength. The structural and morphological properties of composite films were analyzed using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). In addition, the effect of pHs on the releasing drug Poly(vinylpyrrolidone)-Iodine was investigated. This research shows that the addition of acrylamide and glyoxal can improve the physical properties of the modified κ-carrageenan film. Characterization using SEM shows that the addition of glyoxal causes the formation of tissue fibers in SAP. FTIR spectra indicated the formation of cross bonds in modified SAP film at 3294.42 cm-1 (carboxylic acid). The treatment under alkaline conditions will increase drug release ability.Keywords: κ-carrageenan; hydrogels; acrylamide; glyoxal; drug delivery
{"title":"Application of Glyoxal Acrylamide Modified Κ-Carrageenan as A Superabsorbent Polymer in Drug Delivery System","authors":"A. Prasetyaningrum, A. F. A. Raemas, N. Rokhati, B. Jos","doi":"10.14710/reaktor.20.3.150-158","DOIUrl":"https://doi.org/10.14710/reaktor.20.3.150-158","url":null,"abstract":"The hydrogel is superabsorbent polymers (SAP) that are biodegradable and can be obtained from polysaccharides, lipids, and proteins. Polysaccharides include cellulose, starch and their derivatives, seaweed extracts such as carrageenan, alginate, pectin, and chitosan. Carrageenan is the result of the extraction of red seaweed sap with an alkaline solution. The main objective of this study was to simultaneously increase the strength and properties of κ-carrageenan SAP film with the addition of glyoxal and acrylamide as crosslinkers. The addition of acrylamide (variated from 1 to 7 % b/v) into the k-Carrageenan based SAP hydrogel compound and the presence of glyoxal as crosslink agent (variated from 0 to 1,0 % v/v). The physical properties of the SAP films were analyze using swelling degree and tensile strength. The structural and morphological properties of composite films were analyzed using Fourier Transform Infrared (FTIR) and Scanning Electron Microscopy (SEM). In addition, the effect of pHs on the releasing drug Poly(vinylpyrrolidone)-Iodine was investigated. This research shows that the addition of acrylamide and glyoxal can improve the physical properties of the modified κ-carrageenan film. Characterization using SEM shows that the addition of glyoxal causes the formation of tissue fibers in SAP. FTIR spectra indicated the formation of cross bonds in modified SAP film at 3294.42 cm-1 (carboxylic acid). The treatment under alkaline conditions will increase drug release ability.Keywords: κ-carrageenan; hydrogels; acrylamide; glyoxal; drug delivery","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73880815","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 : 2020-10-13DOI: 10.14710/REAKTOR.20.3.138-149
B. Sudrajat, W. Widayat, N. Widiantara, H. Satriadi, Maria Siahaan, Wira Pinem
Biodiesel offers better combustion efficiency, lower sulfur content and aromatic compounds, higher cetane numbers than diesel fuel, biodegradable and renewable properties that are not possessed by conventional fuels such as diesel fuel. This study aims to study the modeling of esterification process of Kapok seed oil using 3 % liquid ionic catalyst 1-Butyl-3-MethydidazoliumHexafluorophosphate (BMIM-PF6). The validation results of reaction kinetic models for experiments and simulations provide an adjacent correlation value, that is R2 = 0.99526, with the rate constant value (k) based on experimental data are 0.003815 L/mol.s and 0.0038 L/mol.s for the simulation data. Based on the simulation results, the proper reaction order for this esterification reaction is the first order reaction equation with a value of R2 = 0.99526, while the second order reaction gives the value R2 = 0.89453. The reaction kinetics parameters obtained from the experimental results are A = 0.012 L/mol.s and -Ea = -0.437 kJ/mol, while the reaction parameters of the simulation are A = 1.0384 L/mol.s and -Ea = -89.5 kJ/mol.Keywords: Esterification, Ionic Liquid Catalyst, Kinetic
{"title":"Kinetic Study of Kapok Seed Oil Esterification using BMIM-PF6 Catalyst","authors":"B. Sudrajat, W. Widayat, N. Widiantara, H. Satriadi, Maria Siahaan, Wira Pinem","doi":"10.14710/REAKTOR.20.3.138-149","DOIUrl":"https://doi.org/10.14710/REAKTOR.20.3.138-149","url":null,"abstract":"Biodiesel offers better combustion efficiency, lower sulfur content and aromatic compounds, higher cetane numbers than diesel fuel, biodegradable and renewable properties that are not possessed by conventional fuels such as diesel fuel. This study aims to study the modeling of esterification process of Kapok seed oil using 3 % liquid ionic catalyst 1-Butyl-3-MethydidazoliumHexafluorophosphate (BMIM-PF6). The validation results of reaction kinetic models for experiments and simulations provide an adjacent correlation value, that is R2 = 0.99526, with the rate constant value (k) based on experimental data are 0.003815 L/mol.s and 0.0038 L/mol.s for the simulation data. Based on the simulation results, the proper reaction order for this esterification reaction is the first order reaction equation with a value of R2 = 0.99526, while the second order reaction gives the value R2 = 0.89453. The reaction kinetics parameters obtained from the experimental results are A = 0.012 L/mol.s and -Ea = -0.437 kJ/mol, while the reaction parameters of the simulation are A = 1.0384 L/mol.s and -Ea = -89.5 kJ/mol.Keywords: Esterification, Ionic Liquid Catalyst, Kinetic","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74408709","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 : 2020-10-13DOI: 10.14710/reaktor.20.3.159-159
Reaktor Editorial
Correction to: Reaktor (2018), 18 (4): 216-223 (doi: https://doi.org/10.14710/reaktor.18.04.216-223) An error appeared in the article entitled “Evaluation Performance of Pneumatic Dryer for Cassava Starch” published in Reaktor. In the published article the acknowledgement was:The authors would like to thank Widiantara, Maria Agustin Taolin and Dea Endah, Y. for supporting in preparation of materials this research. The acknowledgement of the article is corrected to be: none The original article can be access online at: https://doi.org/10.14710/reaktor.18.04.216-223 How to Cite This Article: Suherman and Hidayati, N. (2018), Evaluation Performance of Pneumatic Dryer for Cassava Starch, Reaktor, 18(4), 216-223,http://doi.org/10.14710/reaktor.18.04.216-223. Permalink/DOI: http://doi.org/10.14710/reaktor.20.03.159-159
Reaktor (2018)， 18 (4): 216-223 (doi: https://doi.org/10.14710/reaktor.18.04.216-223)在Reaktor上发表的题为“木薯淀粉的气动干燥机性能评估”的文章中出现错误。在发表的文章中，致谢是:作者要感谢Widiantara, Maria Agustin Taolin和Dea Endah, Y.对本研究材料准备的支持。原文可在以下网址获取:https://doi.org/10.14710/reaktor.18.04.216-223本文引用方式:Suherman and Hidayati, N.(2018)，木薯淀粉的风动干燥机性能评价，机械工程，18(4)，216-223,http://doi.org/10.14710/reaktor.18.04.216-223。永久链接/ DOI: http://doi.org/10.14710/reaktor.20.03.159 - 159
{"title":"Erratum to: Evaluation Performance of Pneumatic Dryer for Cassava Starch [18 (4): 216-223]","authors":"Reaktor Editorial","doi":"10.14710/reaktor.20.3.159-159","DOIUrl":"https://doi.org/10.14710/reaktor.20.3.159-159","url":null,"abstract":"Correction to: Reaktor (2018), 18 (4): 216-223 (doi: https://doi.org/10.14710/reaktor.18.04.216-223) An error appeared in the article entitled “Evaluation Performance of Pneumatic Dryer for Cassava Starch” published in Reaktor. In the published article the acknowledgement was:The authors would like to thank Widiantara, Maria Agustin Taolin and Dea Endah, Y. for supporting in preparation of materials this research. The acknowledgement of the article is corrected to be: none The original article can be access online at: https://doi.org/10.14710/reaktor.18.04.216-223 How to Cite This Article: Suherman and Hidayati, N. (2018), Evaluation Performance of Pneumatic Dryer for Cassava Starch, Reaktor, 18(4), 216-223,http://doi.org/10.14710/reaktor.18.04.216-223. Permalink/DOI: http://doi.org/10.14710/reaktor.20.03.159-159","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72542851","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 : 2020-03-13DOI: 10.14710/reaktor.20.1.47-56
N. Aryanti, Richard A. Williams, Q. Yuan
Rotating membrane emulsification (RMR) has been intensively developed and applied for producing emulsion as well as particulate products such as microcapsules. Polyurea microcapsules were generally prepared by interfacial polycondensation polymerisation with addition of modifier to produce more stable microcapsules. In this research, development of the RMR was applied for producing polymer particles stabilised by nanoparticle without any addition of surfactant or modifier. Two types of membrane pores, the square (Type-A) with hydraulic diameter (Dh) of 84 mm and oblong pores with an aspect ratio of 0.33 (Type-B) having Dh of 69 mm was investigated. For the membranes designed in this research, pore shape A membrane could produce good uniformity in both polyurea microcapsule and polymer particle. In the polymer stabilised particle, this membrane type obtained a narrower size distribution than the usage for o/w emulsification. Reasonable uniform particles at high membrane rotation speed could also be achieved with the use of Type-A membrane. The uniformity confirmed that there was only minor breakup of products during operation at high membrane rotation. This attractive feature was significant in the production of fragile or shear-sensitive particulate products since the delicate structure of these products is possibly easy to destroy at high membrane rotation speed. Keywords: polyurea microcapsules; particles stabilised nanoparticles; slotted pore
{"title":"Application of Square and Oblong Pore Shapes in Rotating Membrane Emulsification to Produce Novel Particulate Products","authors":"N. Aryanti, Richard A. Williams, Q. Yuan","doi":"10.14710/reaktor.20.1.47-56","DOIUrl":"https://doi.org/10.14710/reaktor.20.1.47-56","url":null,"abstract":"Rotating membrane emulsification (RMR) has been intensively developed and applied for producing emulsion as well as particulate products such as microcapsules. Polyurea microcapsules were generally prepared by interfacial polycondensation polymerisation with addition of modifier to produce more stable microcapsules. In this research, development of the RMR was applied for producing polymer particles stabilised by nanoparticle without any addition of surfactant or modifier. Two types of membrane pores, the square (Type-A) with hydraulic diameter (Dh) of 84 mm and oblong pores with an aspect ratio of 0.33 (Type-B) having Dh of 69 mm was investigated. For the membranes designed in this research, pore shape A membrane could produce good uniformity in both polyurea microcapsule and polymer particle. In the polymer stabilised particle, this membrane type obtained a narrower size distribution than the usage for o/w emulsification. Reasonable uniform particles at high membrane rotation speed could also be achieved with the use of Type-A membrane. The uniformity confirmed that there was only minor breakup of products during operation at high membrane rotation. This attractive feature was significant in the production of fragile or shear-sensitive particulate products since the delicate structure of these products is possibly easy to destroy at high membrane rotation speed. Keywords: polyurea microcapsules; particles stabilised nanoparticles; slotted pore","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.14710/reaktor.20.1.47-56","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72371425","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 : 2020-03-13DOI: 10.14710/reaktor.20.1.38-46
K. Natania, Giovani Fransisca Setiawan
Clove oil as a potent antimicrobial agent was added to enhance the properties of edible films. Clove oil was converted to single and double emulsion emulsions for homogenous dispersion in a starch based edible film suspension. Double emulsion was made with two steps emulsification with CaCl2 as inner water phase and guar gum as outer water phase. Single emulsion was prepared similarly without inner water phase. The physico-chemical characteristics and the antimicrobial activity of the of starch-based edible film added with the emulsion were observed. MBC/MFC of clove oil was determined against E. coli, S. aureus, R. stolonifer, and A. niger which gives value of 1.95, 1.46, 0.52, and 0.35 mg/ml respectively. Incorporation of different emulsions on starch-based edible films affect the properties of resulting edible films by increasing thickness, opacity, elongation at break, water vapor transmission rate, and swelling index. Both emulsions showed comparable physicochemical characteristics such as thickness, WVTR, and swelling index value. However, double emulsion produced more superior edible films in terms of tensile strength and antimicrobial activity. 15% addition of double emulsion were able to show strong antimicrobial activity with inhibition zone of more than 8.0 mm for E. coli and 24.0 mm for R. stolonifer.Keywords: clove oil; edible film; single and double emulsion
{"title":"Characterization of Antimicrobial Edible Films with Single and Double Emulsions from Clove (Syzygium aromaticum) Oil","authors":"K. Natania, Giovani Fransisca Setiawan","doi":"10.14710/reaktor.20.1.38-46","DOIUrl":"https://doi.org/10.14710/reaktor.20.1.38-46","url":null,"abstract":"Clove oil as a potent antimicrobial agent was added to enhance the properties of edible films. Clove oil was converted to single and double emulsion emulsions for homogenous dispersion in a starch based edible film suspension. Double emulsion was made with two steps emulsification with CaCl2 as inner water phase and guar gum as outer water phase. Single emulsion was prepared similarly without inner water phase. The physico-chemical characteristics and the antimicrobial activity of the of starch-based edible film added with the emulsion were observed. MBC/MFC of clove oil was determined against E. coli, S. aureus, R. stolonifer, and A. niger which gives value of 1.95, 1.46, 0.52, and 0.35 mg/ml respectively. Incorporation of different emulsions on starch-based edible films affect the properties of resulting edible films by increasing thickness, opacity, elongation at break, water vapor transmission rate, and swelling index. Both emulsions showed comparable physicochemical characteristics such as thickness, WVTR, and swelling index value. However, double emulsion produced more superior edible films in terms of tensile strength and antimicrobial activity. 15% addition of double emulsion were able to show strong antimicrobial activity with inhibition zone of more than 8.0 mm for E. coli and 24.0 mm for R. stolonifer.Keywords: clove oil; edible film; single and double emulsion ","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87822803","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 : 2019-12-31DOI: 10.14710/REAKTOR.19.4.152-161
U. Laila, R. Nurhayati, T. Utami, E. Rahayu
The mathematical models can be used as a tool in predicting microbial population in sorghum fermentation, either spontaneous fermentation or fermentation with the addition of lactic acid bacteria (LAB) inoculum. Gompertz model modified by Gibson, Gompertz model modified by Zwietering, Baranyi-Robert model, Fujikawa model, Richards model, Schnute model were used in predicting the growth of lactic acid bacteria (LAB) and coliform bacteria during spontaneous fermentation, and also the growth of LAB during fermentation with the addition of inoculum. Meanwhile, there was death (inactivation) of coliform bacteria during sorghum fermentation with the addition of LAB inoculum. The Geeraerd model and the Gompertz model modified by Gil et al. were used to predict the inactivation. The accuracy and precision of models were evaluated based on the Root Mean of Sum Square Error (RMSE), coefficient of determination (R2), and curve fitting. Gompertz model modified by Gibson had the highest accuracy and precision, which was followed by the accuracy of the Fujikawa model and Baranyi-Robert model in predicting the growth of LAB and the growth of coliform bacteria during spontaneous fermentation. Meanwhile, in predicting LAB growth during fermentation with the addition of inoculum, high accuracy and precision was obtained from Richards and Schnute models. In predicting the inactivation of coliform bacteria, Geeraerd model provided higher accuracy and precision compared to Gompertz model modified by Gil et al. Keywords: fermentation; inoculum; mathematical; model; sorghum; spontaneous
{"title":"Prediction of Microbial Population in Sorghum Fermentation through Mathematical Models","authors":"U. Laila, R. Nurhayati, T. Utami, E. Rahayu","doi":"10.14710/REAKTOR.19.4.152-161","DOIUrl":"https://doi.org/10.14710/REAKTOR.19.4.152-161","url":null,"abstract":"The mathematical models can be used as a tool in predicting microbial population in sorghum fermentation, either spontaneous fermentation or fermentation with the addition of lactic acid bacteria (LAB) inoculum. Gompertz model modified by Gibson, Gompertz model modified by Zwietering, Baranyi-Robert model, Fujikawa model, Richards model, Schnute model were used in predicting the growth of lactic acid bacteria (LAB) and coliform bacteria during spontaneous fermentation, and also the growth of LAB during fermentation with the addition of inoculum. Meanwhile, there was death (inactivation) of coliform bacteria during sorghum fermentation with the addition of LAB inoculum. The Geeraerd model and the Gompertz model modified by Gil et al. were used to predict the inactivation. The accuracy and precision of models were evaluated based on the Root Mean of Sum Square Error (RMSE), coefficient of determination (R2), and curve fitting. Gompertz model modified by Gibson had the highest accuracy and precision, which was followed by the accuracy of the Fujikawa model and Baranyi-Robert model in predicting the growth of LAB and the growth of coliform bacteria during spontaneous fermentation. Meanwhile, in predicting LAB growth during fermentation with the addition of inoculum, high accuracy and precision was obtained from Richards and Schnute models. In predicting the inactivation of coliform bacteria, Geeraerd model provided higher accuracy and precision compared to Gompertz model modified by Gil et al. Keywords: fermentation; inoculum; mathematical; model; sorghum; spontaneous","PeriodicalId":20874,"journal":{"name":"Reaktor","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77029625","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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