Cadmium (Cd) is a toxic heavy metal with the active property of reacting with other components so that cadmium residues can quickly enter the food chain and cause cardiovascular, kidney, and cancer diseases. The purpose was to synthesize the magnetite mercaptosilicate ion imprinted polymer adsorbent material by forming Ion-Imprinted Polymer as a template, to analyze the characterization results using XRD and SEM-EDS, and to determine the adsorption test results for Cd metal ions. The results of the characterization of XRD show that there is a broad peak at a diffraction angle of 2θ= 20-220 with an amorphous structure, which is silica, and there is a high peak at a diffraction angle of 2θ= 35.55140 which indicates magnetite. The results of SEM analysis with magnifications of 500x, 1000x, and 5000x showed that the surface morphology of the particles was not uniform. For the EDS results, it can be seen that the components of the magnetite mercaptosilicate ion imprinted polymer material are elements C, O, Si, S, and Fe, with a mass percentage of 25.0%; 41.2%; 29.9%; 3.28% and 0.8%. The results of the adsorption test for the Magnetite-IIP-Mercaptosilika Material were able to adsorb Cd ions with the highest adsorption capacity of 10.536 mg/g at a concentration of 100 mg/L. Then the selectivity coefficient value of the Ion Cd metal ion is 2.32 greater than 1, indicating that the selectivity of the magnetite mercaptosilicate ion imprinted polymer material is much higher for Ion Cd metal ions than for Cu and Cr ions with a selectivity coefficient of 0.1 and 0.26.
{"title":"Synthesis and Characterization of Adsorbent Materials Magnetite Mercaptosilicate Ion Imprinted Polymer as Cadmium Ion Adsorbent","authors":"None Nabela Viviana, None Ngatijo, None Restina Bemis, None Diah Riski Gusti","doi":"10.25077/jrk.v14i2.621","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.621","url":null,"abstract":"Cadmium (Cd) is a toxic heavy metal with the active property of reacting with other components so that cadmium residues can quickly enter the food chain and cause cardiovascular, kidney, and cancer diseases. The purpose was to synthesize the magnetite mercaptosilicate ion imprinted polymer adsorbent material by forming Ion-Imprinted Polymer as a template, to analyze the characterization results using XRD and SEM-EDS, and to determine the adsorption test results for Cd metal ions. The results of the characterization of XRD show that there is a broad peak at a diffraction angle of 2θ= 20-220 with an amorphous structure, which is silica, and there is a high peak at a diffraction angle of 2θ= 35.55140 which indicates magnetite. The results of SEM analysis with magnifications of 500x, 1000x, and 5000x showed that the surface morphology of the particles was not uniform. For the EDS results, it can be seen that the components of the magnetite mercaptosilicate ion imprinted polymer material are elements C, O, Si, S, and Fe, with a mass percentage of 25.0%; 41.2%; 29.9%; 3.28% and 0.8%. The results of the adsorption test for the Magnetite-IIP-Mercaptosilika Material were able to adsorb Cd ions with the highest adsorption capacity of 10.536 mg/g at a concentration of 100 mg/L. Then the selectivity coefficient value of the Ion Cd metal ion is 2.32 greater than 1, indicating that the selectivity of the magnetite mercaptosilicate ion imprinted polymer material is much higher for Ion Cd metal ions than for Cu and Cr ions with a selectivity coefficient of 0.1 and 0.26.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135944205","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}
Pyrolysis is one way to minimise plastic waste. This process requires a catalyst such as zeolite. Natural zeolite needs to be activated to increase its catalytic activity. Therefore, this research was carried out by activating Ende's natural zeolite using 1% hydrofluoric acid (HF), 6M hydrochloric acid (HCl), and 1M ammonium chloride (NH4Cl) to be used as catalysts in the pyrolysis of polyethylene from plastic waste. Pyrolysis was carried out at operating temperatures of 300 oC, 350 oC, 400 oC, and 450 oC, and treated with a catalyst composition of 0%, 5%, 10%, and 15% from 1000 grams of polyethylene. Based on the results of the study, it was concluded that activation of Ende's natural zeolite could change the chemical and physical properties of Ende's natural zeolite, including crystallinity, surface area, pore volume, and pore radius, and acidity to serve as a catalyst. Treatment of 10% catalyst from 1000 mg of plastic at an operating temperature of 400oC reduced the activation energy to 4.371.1 cal/mol and produced 80% more paraffin fraction in polyethylene pyrolysis oil from plastic waste.
{"title":"Pemanfaatan Zeolit Alam Ende Sebagai Katalis dalam Pirolisis Polietilena dari Sampah Plastik","authors":"Gregorio Antonny Bani","doi":"10.25077/jrk.v14i2.607","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.607","url":null,"abstract":"Pyrolysis is one way to minimise plastic waste. This process requires a catalyst such as zeolite. Natural zeolite needs to be activated to increase its catalytic activity. Therefore, this research was carried out by activating Ende's natural zeolite using 1% hydrofluoric acid (HF), 6M hydrochloric acid (HCl), and 1M ammonium chloride (NH4Cl) to be used as catalysts in the pyrolysis of polyethylene from plastic waste. Pyrolysis was carried out at operating temperatures of 300 oC, 350 oC, 400 oC, and 450 oC, and treated with a catalyst composition of 0%, 5%, 10%, and 15% from 1000 grams of polyethylene. Based on the results of the study, it was concluded that activation of Ende's natural zeolite could change the chemical and physical properties of Ende's natural zeolite, including crystallinity, surface area, pore volume, and pore radius, and acidity to serve as a catalyst. Treatment of 10% catalyst from 1000 mg of plastic at an operating temperature of 400oC reduced the activation energy to 4.371.1 cal/mol and produced 80% more paraffin fraction in polyethylene pyrolysis oil from plastic waste.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136033679","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}
Taufik Muhammad Fakih, Dwi Syah Fitra Ramadhan, Aulia Fikri Hidayat, Budi Prabowo Soewondo
Despite the relatively slow evolutionary rate of SARS-CoV-2 in comparison to other RNA viruses, the extensive and rapid transmission during the COVID-19 pandemic has led to the emergence of significant genetic diversity since the virus first infected the human population. This has resulted in various variants, such as Alpha (B.1.1.7), Beta (B.1.351), Gamma (P.1), among others. Of particular concern are the Delta Variant and newly recognized Variants of Concern (VOCs), including lineages of B.1.617.2, as well as other VOCs discovered through local transmission, such as Epsilon (B.1.427/29-US) and B1.1.7/E484K-UK. The interactions between these variants and the spike protein of SARS-CoV-2, as well as the Angiotensin-converting enzyme 2 (ACE2), have become a primary focus in understanding the infection and spread of the SARS-CoV-2 virus. This research aims to comprehensively identify, evaluate, and explore the structural characteristics of the macromolecular spike protein of SARS-CoV-2 in the Beta, Gamma, and Delta variants using bioinformatics approaches. The methods employed in this study include homology modeling, molecular docking simulations, and molecular dynamics simulations. The research findings indicate that the spike protein of SARS-CoV-2 in the Gamma variant exhibits a strong affinity for ACE2. Therefore, this study is expected to serve as a reference for designing effective vaccine or antiviral candidates targeting various SARS-CoV-2 variants in the treatment of COVID-19 infections.
{"title":"Identifikasi Struktur Protein Spike Varian Baru SARS-CoV-2 secara Bioinformatika dalam Pengembangan Kandidat Terapi COVID-19","authors":"Taufik Muhammad Fakih, Dwi Syah Fitra Ramadhan, Aulia Fikri Hidayat, Budi Prabowo Soewondo","doi":"10.25077/jrk.v14i2.552","DOIUrl":"https://doi.org/10.25077/jrk.v14i2.552","url":null,"abstract":"Despite the relatively slow evolutionary rate of SARS-CoV-2 in comparison to other RNA viruses, the extensive and rapid transmission during the COVID-19 pandemic has led to the emergence of significant genetic diversity since the virus first infected the human population. This has resulted in various variants, such as Alpha (B.1.1.7), Beta (B.1.351), Gamma (P.1), among others. Of particular concern are the Delta Variant and newly recognized Variants of Concern (VOCs), including lineages of B.1.617.2, as well as other VOCs discovered through local transmission, such as Epsilon (B.1.427/29-US) and B1.1.7/E484K-UK. The interactions between these variants and the spike protein of SARS-CoV-2, as well as the Angiotensin-converting enzyme 2 (ACE2), have become a primary focus in understanding the infection and spread of the SARS-CoV-2 virus. This research aims to comprehensively identify, evaluate, and explore the structural characteristics of the macromolecular spike protein of SARS-CoV-2 in the Beta, Gamma, and Delta variants using bioinformatics approaches. The methods employed in this study include homology modeling, molecular docking simulations, and molecular dynamics simulations. The research findings indicate that the spike protein of SARS-CoV-2 in the Gamma variant exhibits a strong affinity for ACE2. Therefore, this study is expected to serve as a reference for designing effective vaccine or antiviral candidates targeting various SARS-CoV-2 variants in the treatment of COVID-19 infections.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136038972","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}
S. D. Nurherdiana, B. Wahyudi, Merry Jhoe Stefanny, Anita Karlina, R. Yogaswara, M. Jalil, H. Fansuri
Polymeric membrane-based-Styrofoam waste in the form of a thin sheet was successfully prepared by a phase-inversion technique in different final solidification treatments, namely, immersion and evaporation. This study aims to identify the effects of different solidification processes on membrane properties such as hydrophobicity, pore configuration, porosity, and membrane temperature stability. Characterization was carried out using contact angle, SEM, FTIR, TGA, and porosity tests. The results showed that an increase in Styrofoam 18-30 wt.% in dimethylformamide (DMF) as solvent decreases the hydrophobicity by 9.5%. The average contact angle of 62–80° indicated that the obtained membrane was prepared by immersion treatment. The membrane subjected to evaporation treatment was hydrophobic. Moreover, the microscopy image shows that the immersed membrane was denser than the evaporated membrane. This showed that a higher exchange rate between the solvent and non-solvent (water) produced a tight membrane than free evaporation in air. The polystyrene membrane from Styrofoam exhibited excellent temperature stability up to 350 °C. In addition, the mechanical strength was affected by employing different solidification processes. The obtained results were also successfully tabulated from a statistical point of view to validate the conclusions. The following information can provide basic knowledge for modifying membrane-based-Styrofoam to optimize zero-waste goals.
{"title":"CHARACTERISTICS OF STYROFOAM WASTE-BASED MEMBRANE THROUGH VAPOR AND LIQUID-INDUCED PHASE INVERSION PROCESS","authors":"S. D. Nurherdiana, B. Wahyudi, Merry Jhoe Stefanny, Anita Karlina, R. Yogaswara, M. Jalil, H. Fansuri","doi":"10.20473/jkr.v8i1.42957","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.42957","url":null,"abstract":"Polymeric membrane-based-Styrofoam waste in the form of a thin sheet was successfully prepared by a phase-inversion technique in different final solidification treatments, namely, immersion and evaporation. This study aims to identify the effects of different solidification processes on membrane properties such as hydrophobicity, pore configuration, porosity, and membrane temperature stability. Characterization was carried out using contact angle, SEM, FTIR, TGA, and porosity tests. The results showed that an increase in Styrofoam 18-30 wt.% in dimethylformamide (DMF) as solvent decreases the hydrophobicity by 9.5%. The average contact angle of 62–80° indicated that the obtained membrane was prepared by immersion treatment. The membrane subjected to evaporation treatment was hydrophobic. Moreover, the microscopy image shows that the immersed membrane was denser than the evaporated membrane. This showed that a higher exchange rate between the solvent and non-solvent (water) produced a tight membrane than free evaporation in air. The polystyrene membrane from Styrofoam exhibited excellent temperature stability up to 350 °C. In addition, the mechanical strength was affected by employing different solidification processes. The obtained results were also successfully tabulated from a statistical point of view to validate the conclusions. The following information can provide basic knowledge for modifying membrane-based-Styrofoam to optimize zero-waste goals.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"183 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74648681","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}
This study aims to synthesize a ZnO/TiO2 (ZT) nanocomposite from Carica papaya leaf extract and evaluate its photocatalytic activity. The ZT nanocomposite was prepared using the sol-gel method with ZnO/TiO2 4-gram (ZT4) concentration variations and ZnO/TiO2 6-gram (ZT6). Methylene Blue (MB) was used as a model dye to test its photocatalytic properties. The trend for most activity is shown by ZT4 UV light 40 mg and ZT6 UV light (60 mg), which is 87%. Characterization of ZnO/TiO2 (ZT) nanocomposite using FTIR and XRD The ZT4 nanocomposite had an average crystallite size of approximately 12 nm and crystallinity percentage of 92%, whereas the ZT6 nanocomposite had an average crystallite size of approximately 6 nm and crystallinity percentage of 97%. FTIR resulted in some group C=C stretching alkene, C-H stretching vibrations of an aromatic aldehyde, and O-H stretching of alcohols and Zn-Ti-O in the fingerprint region 393.48 cm-1 to 987.55 cm-1 for ZT4 and in the fingerprint region 401.19 cm-1 to 864.11 cm-1 for ZT6.
{"title":"GREEN SYNTHESIS, CHARACTERIZATION, PHOTOCATALYTIC ACTIVITY OF ZnO/TiO2 NANOCOMPOSITE FROM Carica papaya LEAVES","authors":"Safira Salsabilla, D. K. Maharani","doi":"10.20473/jkr.v8i1.43813","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.43813","url":null,"abstract":"This study aims to synthesize a ZnO/TiO2 (ZT) nanocomposite from Carica papaya leaf extract and evaluate its photocatalytic activity. The ZT nanocomposite was prepared using the sol-gel method with ZnO/TiO2 4-gram (ZT4) concentration variations and ZnO/TiO2 6-gram (ZT6). Methylene Blue (MB) was used as a model dye to test its photocatalytic properties. The trend for most activity is shown by ZT4 UV light 40 mg and ZT6 UV light (60 mg), which is 87%. Characterization of ZnO/TiO2 (ZT) nanocomposite using FTIR and XRD The ZT4 nanocomposite had an average crystallite size of approximately 12 nm and crystallinity percentage of 92%, whereas the ZT6 nanocomposite had an average crystallite size of approximately 6 nm and crystallinity percentage of 97%. FTIR resulted in some group C=C stretching alkene, C-H stretching vibrations of an aromatic aldehyde, and O-H stretching of alcohols and Zn-Ti-O in the fingerprint region 393.48 cm-1 to 987.55 cm-1 for ZT4 and in the fingerprint region 401.19 cm-1 to 864.11 cm-1 for ZT6.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"192 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81252740","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}
Syah Sultan Ali Muzakhar, Lutfi Rizki Fauzi, D. Putri
Indonesia has many diverse natural resources that still cannot be utilized optimally such as the extraction of essential oil from Cabbage Roses flowers (Rose × centifolia). This study compares the extraction amendments, extraction time, and essential oil composition of fresh rose flowers obtained by the Solvent-Free Microwave Extraction (SFME) method to those obtained using the Microwave Hydro-Distillation (MHD) extraction method. Optimum conditions using the same amount of raw material in this study for the MHD method optimum conditions of operation: time of 90 minutes; the ratio of 1 g/mL; the power of 450 W, obtained a yield of 0.152% and SFME method optimum conditions of operation: time of 90 minutes, ratio 0.2 g/mL; power 450 W, obtained a yield of 0.358%. Electricity consumption to obtain 1 g of rose essential oil extracted using the MHD method is 4.087 kWh, while for the SFME method, it is 1.073 kWh. So it can also be said that the MHD method requires electricity consumption which is 3.8 times higher when compared to the SFME method.
{"title":"COMPARISON PROCESS OF SOLVENT-FREE MICROWAVE EXTRACTION AND MICROWAVE HYDRO-DISTILLATION METHODS IN ESSENTIAL OIL PRODUCTION FROM CABBAGE ROSES FLOWER (Rose × centifolia)","authors":"Syah Sultan Ali Muzakhar, Lutfi Rizki Fauzi, D. Putri","doi":"10.20473/jkr.v8i1.40928","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.40928","url":null,"abstract":"Indonesia has many diverse natural resources that still cannot be utilized optimally such as the extraction of essential oil from Cabbage Roses flowers (Rose × centifolia). This study compares the extraction amendments, extraction time, and essential oil composition of fresh rose flowers obtained by the Solvent-Free Microwave Extraction (SFME) method to those obtained using the Microwave Hydro-Distillation (MHD) extraction method. Optimum conditions using the same amount of raw material in this study for the MHD method optimum conditions of operation: time of 90 minutes; the ratio of 1 g/mL; the power of 450 W, obtained a yield of 0.152% and SFME method optimum conditions of operation: time of 90 minutes, ratio 0.2 g/mL; power 450 W, obtained a yield of 0.358%. Electricity consumption to obtain 1 g of rose essential oil extracted using the MHD method is 4.087 kWh, while for the SFME method, it is 1.073 kWh. So it can also be said that the MHD method requires electricity consumption which is 3.8 times higher when compared to the SFME method.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83615507","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}
Various ammonia-ethanol mole ratios were successfully used for the synthesis of silica nanoparticles for rhodamine B adsorption. This study aims to determine the characteristics of the adsorbent at different ammonia-ethanol mole ratios, maximum adsorption at pH, and contact time. Several steps, including extraction of Na2SiO3 from rice husk ash, synthesis of adsorbents with ammonia-ethanol mole ratios (14:1, 21:1, 28:1, and 42:1), and their characterization. The parameters studied in the adsorbent include the functional groups, particle size, maximum pH, and rate constant adsorption. The FTIR results showed that all adsorbents had functional groups, indicating the presence of silica. The results suggest that the optimum mole ratio of NS 14:1 particles has a size of 39.82 nm. The optimum adsorption of rhodamine B by NS 14:1 occurred at a pH 3 of 0.00419 mmol.g-1 and a contact time of 40 min. The rate constant of adsorption by NS 14:1 was 102.42 g.mmol-1.min-1 followed a pseudo-second order kinetic model.
{"title":"EFFECT OF AMMONIA-ETHANOL MOLE RATIO ON THE SILICA NANOPARTICLES SYNTHESIZED FOR RHODAMINE B DYES ADSORPTION","authors":"Yayuk Puji Lestari, Amaria Amaria","doi":"10.20473/jkr.v8i1.44400","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.44400","url":null,"abstract":"Various ammonia-ethanol mole ratios were successfully used for the synthesis of silica nanoparticles for rhodamine B adsorption. This study aims to determine the characteristics of the adsorbent at different ammonia-ethanol mole ratios, maximum adsorption at pH, and contact time. Several steps, including extraction of Na2SiO3 from rice husk ash, synthesis of adsorbents with ammonia-ethanol mole ratios (14:1, 21:1, 28:1, and 42:1), and their characterization. The parameters studied in the adsorbent include the functional groups, particle size, maximum pH, and rate constant adsorption. The FTIR results showed that all adsorbents had functional groups, indicating the presence of silica. The results suggest that the optimum mole ratio of NS 14:1 particles has a size of 39.82 nm. The optimum adsorption of rhodamine B by NS 14:1 occurred at a pH 3 of 0.00419 mmol.g-1 and a contact time of 40 min. The rate constant of adsorption by NS 14:1 was 102.42 g.mmol-1.min-1 followed a pseudo-second order kinetic model.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80908991","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}
Alsya Firdausi Nuzula, A. Kristanti, N. Aminah, Y. Takaya, Marisa Nur Sahadatin, A. P. Wardana
Black turmeric (Curcuma aeruginosa) is Indonesian medicinal plant belonging to the Zingeberaceae family, mostly found on Java. This study aimed to determine the new molecular structures of the compounds isolated from black turmeric originating from Indonesia. Isolation of the secondary metabolite compounds was initiated by solid-liquid extraction using the maceration method with ethanol solvent, followed by liquid-liquid extraction using the partition method with n-hexane and dichloromethane as solvents. Separation and purification were carried out using vacuum liquid chromatography (VLC) and gravity column chromatography (GCC). The isolated compounds were characterized using spectroscopic methods, including UV-Vis, IR, and NMR spectroscopy. The isolation resulted in three sesquiterpenoid compounds, (E)-7-isopropyl-4,10-dimethylcyclodec-10-ene-5,8-dione (curdione), (1R,10R)-Epoxy-(-)-1,10-dihydrocurdione, and zedoalactone B, together with two common terpenes, ethyl tetradecanoate and 1-hexadecene.
{"title":"ISOLATION AND STRUCTURE ELUCIDATION OF SECONDARY METABOLITE COMPOUNDS FROM Curcuma aeruginosa","authors":"Alsya Firdausi Nuzula, A. Kristanti, N. Aminah, Y. Takaya, Marisa Nur Sahadatin, A. P. Wardana","doi":"10.20473/jkr.v8i1.44073","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.44073","url":null,"abstract":"Black turmeric (Curcuma aeruginosa) is Indonesian medicinal plant belonging to the Zingeberaceae family, mostly found on Java. This study aimed to determine the new molecular structures of the compounds isolated from black turmeric originating from Indonesia. Isolation of the secondary metabolite compounds was initiated by solid-liquid extraction using the maceration method with ethanol solvent, followed by liquid-liquid extraction using the partition method with n-hexane and dichloromethane as solvents. Separation and purification were carried out using vacuum liquid chromatography (VLC) and gravity column chromatography (GCC). The isolated compounds were characterized using spectroscopic methods, including UV-Vis, IR, and NMR spectroscopy. The isolation resulted in three sesquiterpenoid compounds, (E)-7-isopropyl-4,10-dimethylcyclodec-10-ene-5,8-dione (curdione), (1R,10R)-Epoxy-(-)-1,10-dihydrocurdione, and zedoalactone B, together with two common terpenes, ethyl tetradecanoate and 1-hexadecene.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73737259","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}
This study aims to investigate the effect of variations Palm Kernel Shell Ash (PKSA) in weight and stirring duration on the quality of waste palm cooking oil (WPCO). PKSA is waste from the use of Palm Kernel Shell (PKS) as fuel in palm oil factories. The method used in this study is a laboratory experiment with variations in the weight of PKSA and variations in stirring duration to improve WPCO quality. PKSA was characterized using XRF, FTIR, and XRD. The parameters of WPCO analyzed were color, water content, and free fatty acid (FFA). The standard used for comparison was the SNI for palm cooking oil 7709-2019. The results showed that the treatment category of S3, where PKSA was 20 g and stirring duration was 90 min, decreased the parameter value of WPCO according to SNI requirements. The improved quality of WPCO can be used for various purposes, including biodiesel, fertilizer and poultry feed.
{"title":"PALM KERNEL SHELL ASH: THE EFFECT OF WEIGHT AND STIRRING DURATION ON WASTE PALM COOKING OIL QUALITY","authors":"Lidya Novita, Yuliana Arsil, Iswadi Idris","doi":"10.20473/jkr.v8i1.40817","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.40817","url":null,"abstract":"This study aims to investigate the effect of variations Palm Kernel Shell Ash (PKSA) in weight and stirring duration on the quality of waste palm cooking oil (WPCO). PKSA is waste from the use of Palm Kernel Shell (PKS) as fuel in palm oil factories. The method used in this study is a laboratory experiment with variations in the weight of PKSA and variations in stirring duration to improve WPCO quality. PKSA was characterized using XRF, FTIR, and XRD. The parameters of WPCO analyzed were color, water content, and free fatty acid (FFA). The standard used for comparison was the SNI for palm cooking oil 7709-2019. The results showed that the treatment category of S3, where PKSA was 20 g and stirring duration was 90 min, decreased the parameter value of WPCO according to SNI requirements. The improved quality of WPCO can be used for various purposes, including biodiesel, fertilizer and poultry feed.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89686453","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}
The development of an optical sensor-based test strip for the detection sibutramine HCl adulteration in traditional herbal products has been studied. The medium of the test strip was cellulosic paper immobilized with Dragendorff’s reagent and tetraethyl orthosilicate (TEOS) as the precursor using the sol-gel method. The presence of sibutramine HCl changed the color of the test strip from yellow to orange-red. The change in color was scanned and converted to RGB values using the ImageJ software. The intensity of the RGB value correlates with the concentration of the analyte. The performance of the test strip had good linearity in the range of 0,1-1,5 mM of sibutramine HCl, and the correlation coefficient (R) was 0,9872. The limit of detection, limit of quantification, precision (% RSD), and percentage of accuracy were 0,2 mM, 0,8 mM, less than 5%, and approximately 80-90%, respectively. The strip test is low cost and simple. Thus, it can be used as an alternative to detect sibutramine HCl in traditional herbal products.
{"title":"FABRICATION OF TEST STRIP FOR SIBUTRAMINE HCl DETECTION IN SLIMMING TRADITIONAL HERBAL MEDICINE","authors":"Robi'atul Andawiyah, Novrynda Eko Satriawan, Jumaati","doi":"10.20473/jkr.v8i1.41110","DOIUrl":"https://doi.org/10.20473/jkr.v8i1.41110","url":null,"abstract":"The development of an optical sensor-based test strip for the detection sibutramine HCl adulteration in traditional herbal products has been studied. The medium of the test strip was cellulosic paper immobilized with Dragendorff’s reagent and tetraethyl orthosilicate (TEOS) as the precursor using the sol-gel method. The presence of sibutramine HCl changed the color of the test strip from yellow to orange-red. The change in color was scanned and converted to RGB values using the ImageJ software. The intensity of the RGB value correlates with the concentration of the analyte. The performance of the test strip had good linearity in the range of 0,1-1,5 mM of sibutramine HCl, and the correlation coefficient (R) was 0,9872. The limit of detection, limit of quantification, precision (% RSD), and percentage of accuracy were 0,2 mM, 0,8 mM, less than 5%, and approximately 80-90%, respectively. The strip test is low cost and simple. Thus, it can be used as an alternative to detect sibutramine HCl in traditional herbal products.","PeriodicalId":33366,"journal":{"name":"Jurnal Riset Kimia","volume":"69 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81888333","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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