Pub Date : 2022-08-02DOI: 10.24114/ijcst.v5i2.37454
ElySabet Pratiwi Siagian, Rumondang Fransiska Tampubolon, I. Riris
Cholesterol in the blood is a form of sterol derived from a lipid molecule that serves as the main structural component of plasma membrane. Atherosclerosis is a change characterized by thickening of the arterial walls due to the accumulation of cholesterol in the intima of blood vessels. By using SPSS analysis, it was found that the Shapiro-Wilk Normality Test with a sig value > 0.05, the data were normally distributed. The results of the analysis in the Test of Homogeneity of Variences table obtained a Sig Value 0.106. This the value of Sig = 0.106 > 0.05, them ho is accept. Thus the ethanol extract of ginger, pandan leaves, citronella, cinnamon, has the potential to reduce cholesterol levels. By using four different doses, the rat group at a dose 100mg/kgbw showed cholesterol levels of 90,75(mg/dl) ± 11,58, the rat group at a dose 200mg/kgbw showed cholesterol levels of 95,5(mg/dl) ± 6,80, the rat group at a dose 300mg/kgbw showed cholesterol levels of 75,75 (mg/dl)± 2,06, the rat group at a dose 400mg/kgbw showed cholesterol levels of 67,5mg/dl ± 2,64.
{"title":"Effect of Giving of Ethanol extract of Ginger (Zingiber officinale Rosc.), Pandan leaves (Pandanus amarylifolius Roxb), Citronella (Cymbopogon nardus (L.) Randle), Cinnamon (Cinnamomum burmanii B.) on Cholesterol Reduction in Male Strain Rats (Rattus Norvegicus)","authors":"ElySabet Pratiwi Siagian, Rumondang Fransiska Tampubolon, I. Riris","doi":"10.24114/ijcst.v5i2.37454","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37454","url":null,"abstract":"Cholesterol in the blood is a form of sterol derived from a lipid molecule that serves as the main structural component of plasma membrane. Atherosclerosis is a change characterized by thickening of the arterial walls due to the accumulation of cholesterol in the intima of blood vessels. By using SPSS analysis, it was found that the Shapiro-Wilk Normality Test with a sig value > 0.05, the data were normally distributed. The results of the analysis in the Test of Homogeneity of Variences table obtained a Sig Value 0.106. This the value of Sig = 0.106 > 0.05, them ho is accept. Thus the ethanol extract of ginger, pandan leaves, citronella, cinnamon, has the potential to reduce cholesterol levels. By using four different doses, the rat group at a dose 100mg/kgbw showed cholesterol levels of 90,75(mg/dl) ± 11,58, the rat group at a dose 200mg/kgbw showed cholesterol levels of 95,5(mg/dl) ± 6,80, the rat group at a dose 300mg/kgbw showed cholesterol levels of 75,75 (mg/dl)± 2,06, the rat group at a dose 400mg/kgbw showed cholesterol levels of 67,5mg/dl ± 2,64.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87757894","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 : 2022-08-02DOI: 10.24114/ijcst.v5i2.37447
K. Khairunnisa, S. Rahmah, R. Selly, Jasmidi Jasmidi, H. Nasution, M. Zubir
Biosorbent derived from agricultural waste as one of the widely used adsorbents has many applications in the environment to remove pollutants, one of which is heavy metal copper (Cu). In this paper, natural sources of agricultural waste materials have been reviewed and have potential as biosorbents for the absorption of heavy metal copper (Cu). The characteristics of the biosorbent that can be used for the absorption of heavy metal copper (Cu) depend on the surface area and pore structure made by the modified method. The biosorbent modification method depends on the precursor and the expected biosorbent characteristics. Natural biosorbents can be converted into modified biosorbents by chemical, physical, or physico-chemical modifications. Therefore, this paper aims to provide information about the absorption of adsorbents from agricultural wastes that have been reported for the absorption of heavy metal copper (Cu) in wastewater
{"title":"Removal of Heavy Metal Copper (Cu) Ions from Wastewaters Using Various Bio-adsorbents","authors":"K. Khairunnisa, S. Rahmah, R. Selly, Jasmidi Jasmidi, H. Nasution, M. Zubir","doi":"10.24114/ijcst.v5i2.37447","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37447","url":null,"abstract":"Biosorbent derived from agricultural waste as one of the widely used adsorbents has many applications in the environment to remove pollutants, one of which is heavy metal copper (Cu). In this paper, natural sources of agricultural waste materials have been reviewed and have potential as biosorbents for the absorption of heavy metal copper (Cu). The characteristics of the biosorbent that can be used for the absorption of heavy metal copper (Cu) depend on the surface area and pore structure made by the modified method. The biosorbent modification method depends on the precursor and the expected biosorbent characteristics. Natural biosorbents can be converted into modified biosorbents by chemical, physical, or physico-chemical modifications. Therefore, this paper aims to provide information about the absorption of adsorbents from agricultural wastes that have been reported for the absorption of heavy metal copper (Cu) in wastewater","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86707000","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 : 2022-08-02DOI: 10.24114/ijcst.v5i2.37451
A. Sinaga, Eddyanto Eddyanto, Andreas Nababan
In this research, natural rubber SIR-20 was modified by the chain severing reaction method with the addition of decimal peroxide and flowing oxygen gas as much as 2 l/mint for 6 hours at a temperature of 135oC while stirring. Fourier Transformed-Infra Red (FTIR) spectra obtained, it can be concluded that there has been a chain breaking reaction seen from the functional group analysis which produces a series of distinctive peaks in the hydroxyl group (OH) and 2 carbonyl peaks (C=O) which are obtained at natural rubber SIR-20 + 3 phr DCP of 3435 and 1715, respectively; 1737 and has a strong intensity which indicates a chain breaking reaction has occurred in natural rubber SIR-20. From the results of the FTIR analysis, it was found that the C=O group was getting sharper which was the typical absorption peak originating from maleic anhydride grafted on the natural rubber chain.
{"title":"Modified Natural Rubber Sir-20 Using Chain Scission Reaction Method And Grafting With Anhydrous Maleic","authors":"A. Sinaga, Eddyanto Eddyanto, Andreas Nababan","doi":"10.24114/ijcst.v5i2.37451","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37451","url":null,"abstract":"In this research, natural rubber SIR-20 was modified by the chain severing reaction method with the addition of decimal peroxide and flowing oxygen gas as much as 2 l/mint for 6 hours at a temperature of 135oC while stirring. Fourier Transformed-Infra Red (FTIR) spectra obtained, it can be concluded that there has been a chain breaking reaction seen from the functional group analysis which produces a series of distinctive peaks in the hydroxyl group (OH) and 2 carbonyl peaks (C=O) which are obtained at natural rubber SIR-20 + 3 phr DCP of 3435 and 1715, respectively; 1737 and has a strong intensity which indicates a chain breaking reaction has occurred in natural rubber SIR-20. From the results of the FTIR analysis, it was found that the C=O group was getting sharper which was the typical absorption peak originating from maleic anhydride grafted on the natural rubber chain.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80481337","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 : 2022-08-02DOI: 10.24114/ijcst.v5i2.37453
Dina Suciati Saragih, Ridwanto Ridwanto, A. Daulay, Dikki Miswanda, Haris Munandar Nasution
Chitosan is a modification of chitin compounds that are widely found in the outer skin of crustacean animals such as shrimp and crabs. This research includes isolation of chitin and chitosan: deproteination, demineralization, depigmentation and deacetylation namely transformation of chitin into chitosan, characterization of chitosan, FTIR, and chitosan toxicity test with five concentrations of test solution, namely 100 g/ml, 250 g/ml, 500 g/ml, 750 g/ml and 1000 g/ml using the BSLT method by looking at the number of deaths of Artemia salina L larvae (LC50). The results of tiger prawn shell chitosan (Penaeus monodon) obtained the % degree of deacetylation of 60%. The results of the toxicity test showed that chitosan was not toxic to Artemia salina Leach, indicated by the LC50 value > 1000µg/ml. chitosan windu 4994.16 g/ml, chitosan is not toxic
{"title":"Toxicity Test of Windu Shrimp (Penaeus monodon) Skin Chitosan With Brine Shrimp Lethality Test Method","authors":"Dina Suciati Saragih, Ridwanto Ridwanto, A. Daulay, Dikki Miswanda, Haris Munandar Nasution","doi":"10.24114/ijcst.v5i2.37453","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37453","url":null,"abstract":"Chitosan is a modification of chitin compounds that are widely found in the outer skin of crustacean animals such as shrimp and crabs. This research includes isolation of chitin and chitosan: deproteination, demineralization, depigmentation and deacetylation namely transformation of chitin into chitosan, characterization of chitosan, FTIR, and chitosan toxicity test with five concentrations of test solution, namely 100 g/ml, 250 g/ml, 500 g/ml, 750 g/ml and 1000 g/ml using the BSLT method by looking at the number of deaths of Artemia salina L larvae (LC50). The results of tiger prawn shell chitosan (Penaeus monodon) obtained the % degree of deacetylation of 60%. The results of the toxicity test showed that chitosan was not toxic to Artemia salina Leach, indicated by the LC50 value > 1000µg/ml. chitosan windu 4994.16 g/ml, chitosan is not toxic","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-08-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73732278","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 : 2022-07-30DOI: 10.24114/ijcst.v5i2.37465
G. I. Dalimunthe, Adli Nuzula Rahmah, Zulmai Rani, Yayuk Putri Rahayu
Coffee drinks are drinks that come from the processing and extraction of coffee beans. One of which is caffeine. Coffee contains approximately 24 of the most important substances. The purpose of this study was to determine the level of caffeine in coffee drinks from various types of packaging. The research stages include sample collection and preparation; identification of caffeine content; and examination of caffeine levels using UV spectrophotometry. The results showed that the three samples of coffee drinks sold at the minimarket in Jermal, Medan contained caffeine, and the levels of caffeine in coffee drinks were 26,352±0,292 mg/100mL (Sample A), 15,179±0,286 mg/100mL (Sample B), and 7,965±0,98 mg/100mL (Sample C). The caffeine content obtained meets the requirements of SNI, where the maximum amount of caffeine that can be consumed by the public in a day based on SNI is 50 mg–150 mg.
{"title":"Caffeine Levels from Various Types of Coffee Drink Packaging Circulated in the Medan City Market Were Examined Using a UV Spectrophotometry Method","authors":"G. I. Dalimunthe, Adli Nuzula Rahmah, Zulmai Rani, Yayuk Putri Rahayu","doi":"10.24114/ijcst.v5i2.37465","DOIUrl":"https://doi.org/10.24114/ijcst.v5i2.37465","url":null,"abstract":"Coffee drinks are drinks that come from the processing and extraction of coffee beans. One of which is caffeine. Coffee contains approximately 24 of the most important substances. The purpose of this study was to determine the level of caffeine in coffee drinks from various types of packaging. The research stages include sample collection and preparation; identification of caffeine content; and examination of caffeine levels using UV spectrophotometry. The results showed that the three samples of coffee drinks sold at the minimarket in Jermal, Medan contained caffeine, and the levels of caffeine in coffee drinks were 26,352±0,292 mg/100mL (Sample A), 15,179±0,286 mg/100mL (Sample B), and 7,965±0,98 mg/100mL (Sample C). The caffeine content obtained meets the requirements of SNI, where the maximum amount of caffeine that can be consumed by the public in a day based on SNI is 50 mg–150 mg.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89936479","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 : 2022-03-01DOI: 10.24114/ijcst.v5i1.33160
Yoahana Elisabet, Catur Kurniawan
The purpose of this study is to distinguish physical changes and chemical changes. This study uses an experimental method, in which this experiment is carried out to prove data and hypotheses regarding changes in physics and chemical changes. The hypotheses and data that will be proven are the factors that influence physical changes and chemical changes, examples of physical changes and also chemical changes, as well as significant differences between physical and chemical changes. In this research, I used some tools and I need some materials. For the tools that used in this research were test tube holders, measuring pipettes, droppers, spirits lamp, clay triangle and gauze, beaker glass, test tubes and also the rack of test tubes, watch glass. While for the materials that needed are I2, CuSO4, Mg, HCl, CCl4, KI, wax, H2O.
{"title":"Understanding the Difference Between Chemical Changes and Physical Changes","authors":"Yoahana Elisabet, Catur Kurniawan","doi":"10.24114/ijcst.v5i1.33160","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33160","url":null,"abstract":"The purpose of this study is to distinguish physical changes and chemical changes. This study uses an experimental method, in which this experiment is carried out to prove data and hypotheses regarding changes in physics and chemical changes. The hypotheses and data that will be proven are the factors that influence physical changes and chemical changes, examples of physical changes and also chemical changes, as well as significant differences between physical and chemical changes. In this research, I used some tools and I need some materials. For the tools that used in this research were test tube holders, measuring pipettes, droppers, spirits lamp, clay triangle and gauze, beaker glass, test tubes and also the rack of test tubes, watch glass. While for the materials that needed are I2, CuSO4, Mg, HCl, CCl4, KI, wax, H2O.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"48 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79174961","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 : 2022-03-01DOI: 10.24114/ijcst.v5i1.33158
Dikki Miswanda, M. Zubir, R. Selly, Siti Rahmah, N. Nuryono
A study of the adsorption kinetics of Au(III) ions has been carried out by an adsorbent of silica-chitosan coated magnetic material (BMSK). The BMSK adsorbent was synthesized through a sol-gel process using magnetic materials from iron sand, sodium silicate, and chitosan with 3-chloropropyltrimethoxysilane linker. The adsorption kinetics was studied through batch adsorption system by varying the adsorption time. The number of adsorbed Au(III) ions was calculated based on the difference in metal concentrations before and after adsorption which was analyzed by atomic absorption spectroscopy. The equilibrium of the adsorption of Au(III) ions by the BMSK adsorbent began to occur after the adsorption lasted for 60 minutes. The data shows the interaction of BMSK adsorbent with Au(III) ion following a pseudo order-2 reaction kinetics model with a value of reaction rate constant (k) = 1.199 x 103 g.mg-1.min-1.
研究了二氧化硅-壳聚糖包覆磁性材料(BMSK)对Au(III)离子的吸附动力学。以铁砂、水玻璃、壳聚糖为原料，以3-氯丙基三甲氧基硅烷为连接剂，采用溶胶-凝胶法制备了BMSK吸附剂。通过间歇式吸附系统研究了不同吸附时间的吸附动力学。通过原子吸收光谱分析吸附前后金属浓度的差异，计算吸附Au(III)离子的数量。吸附持续60分钟后，BMSK吸附剂对Au(III)离子的吸附开始达到平衡。结果表明，BMSK吸附剂与Au(III)离子的相互作用符合准二级反应动力学模型，反应速率常数(k) = 1.199 x 103 g.mg-1.min-1。
{"title":"Kinetics Study of Gold (III) on Chitosan-Silica Coated Magnetic Material","authors":"Dikki Miswanda, M. Zubir, R. Selly, Siti Rahmah, N. Nuryono","doi":"10.24114/ijcst.v5i1.33158","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33158","url":null,"abstract":"A study of the adsorption kinetics of Au(III) ions has been carried out by an adsorbent of silica-chitosan coated magnetic material (BMSK). The BMSK adsorbent was synthesized through a sol-gel process using magnetic materials from iron sand, sodium silicate, and chitosan with 3-chloropropyltrimethoxysilane linker. The adsorption kinetics was studied through batch adsorption system by varying the adsorption time. The number of adsorbed Au(III) ions was calculated based on the difference in metal concentrations before and after adsorption which was analyzed by atomic absorption spectroscopy. The equilibrium of the adsorption of Au(III) ions by the BMSK adsorbent began to occur after the adsorption lasted for 60 minutes. The data shows the interaction of BMSK adsorbent with Au(III) ion following a pseudo order-2 reaction kinetics model with a value of reaction rate constant (k) = 1.199 x 103 g.mg-1.min-1.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"103 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79451363","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 : 2022-03-01DOI: 10.24114/ijcst.v5i1.33142
Felivia Angelina Munte, A. Silalahi
Cholesterol is one of the lipids that can form cell membranes and extremity layers and functions as a lipoprotein compound. Rising cholesterol levels can cause various diseases. The leaves of the sijukkot plant have been used as a lowering of cholesterol levels in the body. By using SPSS analysis, it was found that the Shapiro-Wilk Normality Test with a sig value > 0.05, the data were normally distributed. The results of the analysis in the Test of Homogeneity of Variances table obtained a Sig value of 0.510. Thus the value of Sig = 0.510 > 0.05, then Ho is accepted. Thus, the ethanol extract of sijukkot leaves has the potential to reduce cholesterol levels. By using four different doses, the rat group at a dose of 100 mg/kgBW showed cholesterol levels of 77.25 (mg/dL) ± 9.14, the rat group at a dose of 200 mg/kgBW showed cholesterol levels of 62.75 (mg/dL) ± 5.44, the rat group at a dose of 200 mg/kgBW showed a cholesterol level of 62.75 (mg/dL) ± 5.44. 300 mg/kgbw showed a cholesterol level of 61.50 (mg/dL) ± 4.1 and a group of rats at a dose of 400 mg/kgbw showed a cholesterol level of 54.50 (mg/dL) ± 4.1
{"title":"Effect of Addition of Ethanol Extract from Sijukkot Leaves (Lactuca Indica L.) on Cholesterol Reduction in Male Strain Rats (Rattus Norvegicus)","authors":"Felivia Angelina Munte, A. Silalahi","doi":"10.24114/ijcst.v5i1.33142","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33142","url":null,"abstract":"Cholesterol is one of the lipids that can form cell membranes and extremity layers and functions as a lipoprotein compound. Rising cholesterol levels can cause various diseases. The leaves of the sijukkot plant have been used as a lowering of cholesterol levels in the body. By using SPSS analysis, it was found that the Shapiro-Wilk Normality Test with a sig value > 0.05, the data were normally distributed. The results of the analysis in the Test of Homogeneity of Variances table obtained a Sig value of 0.510. Thus the value of Sig = 0.510 > 0.05, then Ho is accepted. Thus, the ethanol extract of sijukkot leaves has the potential to reduce cholesterol levels. By using four different doses, the rat group at a dose of 100 mg/kgBW showed cholesterol levels of 77.25 (mg/dL) ± 9.14, the rat group at a dose of 200 mg/kgBW showed cholesterol levels of 62.75 (mg/dL) ± 5.44, the rat group at a dose of 200 mg/kgBW showed a cholesterol level of 62.75 (mg/dL) ± 5.44. 300 mg/kgbw showed a cholesterol level of 61.50 (mg/dL) ± 4.1 and a group of rats at a dose of 400 mg/kgbw showed a cholesterol level of 54.50 (mg/dL) ± 4.1","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"132 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84915713","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 : 2022-03-01DOI: 10.24114/ijcst.v5i1.33143
G. Sarumaha, Z. Muchtar
Young coconut (Cocos nucifera L.) is a plant with a high cellulose content of 28%. Because of its high cellulose content, young coconut coir fiber has the potential to be synthesized into α-cellulose. The purpose of this research was to use FT-IR to characterize young coconut coir α-cellulose. This research method was use isolation of α-cellulose method (delignification, swelling, and bleaching). 75 grams of young coconut coir can produce 12,1015 grams of α-cellulose. Young coconut coir α-cellulose has a spectrum that is similar to commercial α-cellulose, according to the results of functional group analysis using FT-IR.
{"title":"Synthesis and Characterization of α-Cellulose from Young Coconut Coir (Cocos nucifera L.)","authors":"G. Sarumaha, Z. Muchtar","doi":"10.24114/ijcst.v5i1.33143","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33143","url":null,"abstract":"Young coconut (Cocos nucifera L.) is a plant with a high cellulose content of 28%. Because of its high cellulose content, young coconut coir fiber has the potential to be synthesized into α-cellulose. The purpose of this research was to use FT-IR to characterize young coconut coir α-cellulose. This research method was use isolation of α-cellulose method (delignification, swelling, and bleaching). 75 grams of young coconut coir can produce 12,1015 grams of α-cellulose. Young coconut coir α-cellulose has a spectrum that is similar to commercial α-cellulose, according to the results of functional group analysis using FT-IR.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88262300","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 : 2022-03-01DOI: 10.24114/ijcst.v5i1.33139
Nuraisah Malau, A. Nugraha
This study aims to determine the amount of energy, the difference in energy, the relationship between the amount of energy and the distance between compounds, and the interactions that occur in organic solvent molecules using computational chemistry methods. In determining the amount of energy and interactions that occur, computational chemistry calculations are used using NWChem software version 6.6 with the DFT method with the B3LYP hybrid function/basis set 6-31G, the calculation results are visualized using Jmol software. The results of calculations with large computations of energy for benzene are -230.62447487 KJ/mol, ethanol -154.01322923 KJ/mol, methanol -114.98816558 KJ/mol, hexane are -235.27001385 KJ/mol. Mixture of benzene and ethanol in a ratio of 1 : 1 -384.63823964 KJ/mol, 1 : 2 538.66009762 KJ/mol , and 2 : 1 -615.26607558 KJ/mol. A mixture of benzene and methanol in a ratio of 1 : 1 -345.61255299 KJ/mol, 1 : 2 -460.60826254 KJ/mol, and 2 : 1 -576.24044425 KJ/mol, a mixture of hexane and ethanol in a ratio of 1 : 1 -389.28477268 KJ/mol, 1 : 2 -543.29869234 KJ/mol and 2 : 1 -624.55723290 KJ/mol. A mixture of hexane and methanol at a ratio of 1 : 1 -350.25984691 KJ/mol, 1 : 2 -465.26041654 KJ/mol and 2 : 1 -585.53373886 KJ/mole. The difference in energy is the most in a mixture of benzene and ethanol in a ratio of 1 : 2 -0.00916429 K /mol, in a mixture of benzene and methanol in a ratio of 1 : 2 - 0.00745651 KJ/mol, a mixture of hexane and ethanol in a ratio of 2 : 1 -0.00397597 KJ/mol, and a mixture of hexane and methanol in a ratio of 1 : 2 -0.01407153 KJ/mol. and there is no relationship between the magnitude of the interaction energy of the mixture with the distance between the molecules.
{"title":"Study of Energy and Structure on Interactions Between Molecules In Solvents - Organic Solves Using Computational Chemical Methods","authors":"Nuraisah Malau, A. Nugraha","doi":"10.24114/ijcst.v5i1.33139","DOIUrl":"https://doi.org/10.24114/ijcst.v5i1.33139","url":null,"abstract":"This study aims to determine the amount of energy, the difference in energy, the relationship between the amount of energy and the distance between compounds, and the interactions that occur in organic solvent molecules using computational chemistry methods. In determining the amount of energy and interactions that occur, computational chemistry calculations are used using NWChem software version 6.6 with the DFT method with the B3LYP hybrid function/basis set 6-31G, the calculation results are visualized using Jmol software. The results of calculations with large computations of energy for benzene are -230.62447487 KJ/mol, ethanol -154.01322923 KJ/mol, methanol -114.98816558 KJ/mol, hexane are -235.27001385 KJ/mol. Mixture of benzene and ethanol in a ratio of 1 : 1 -384.63823964 KJ/mol, 1 : 2 538.66009762 KJ/mol , and 2 : 1 -615.26607558 KJ/mol. A mixture of benzene and methanol in a ratio of 1 : 1 -345.61255299 KJ/mol, 1 : 2 -460.60826254 KJ/mol, and 2 : 1 -576.24044425 KJ/mol, a mixture of hexane and ethanol in a ratio of 1 : 1 -389.28477268 KJ/mol, 1 : 2 -543.29869234 KJ/mol and 2 : 1 -624.55723290 KJ/mol. A mixture of hexane and methanol at a ratio of 1 : 1 -350.25984691 KJ/mol, 1 : 2 -465.26041654 KJ/mol and 2 : 1 -585.53373886 KJ/mole. The difference in energy is the most in a mixture of benzene and ethanol in a ratio of 1 : 2 -0.00916429 K /mol, in a mixture of benzene and methanol in a ratio of 1 : 2 - 0.00745651 KJ/mol, a mixture of hexane and ethanol in a ratio of 2 : 1 -0.00397597 KJ/mol, and a mixture of hexane and methanol in a ratio of 1 : 2 -0.01407153 KJ/mol. and there is no relationship between the magnitude of the interaction energy of the mixture with the distance between the molecules.","PeriodicalId":13519,"journal":{"name":"Indonesian Journal of Chemical Science and Technology (IJCST)","volume":"23 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91008113","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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