Pub Date : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p02
I. G. Bawa
Eksplorasi bahan baku fungisida nabati untuk mengendalikan jamur Curvularia verruculosa penyebab penyakit bercak daun pada tanaman padi telah dilakukan. Dari 55 species tumbuhan yang diteliti menghasilkan 73 ekstrak etanol dari berbagai komponen tumbuhan. Beberapa ekstrak tumbuhan mampu menghambat pertumbuhan jamur C. verruculosa dengan sangat kuat, diantaranya ekstrak kulit kayu dan daun Michelia champaca dengan diameter zona hambatan masing-masing sebesar 30,07dan 22,07 mm, ekstrak kulit buah, daging buah dan daun Pangium edule Reinw (29,12;27,17; dan 20,16 mm), ekstrak daun Tamarindus indica L. (26,10 mm), ekstrak daun Michelia alba (26,03 mm) dan ekstrak daun Allamanda cathartica (23,00 mm). Hasil uji fitokimia menunjukkan bahwa mayoritas ekstrak tumbuhan yang memiliki daya hambat yang sangat kuat terhadap jamur C. verruculosa mengandung senyawa metabolit sekunder jenis terpenoid. Kata kunci: aktivitas antijamur, C. verruculossa, ekstrak tumbuhan, kandungan kimia ekstrak tumbuhan
{"title":"EKSPLORASI EKSTRAK TUMBUHAN YANG MENUNJUKKAN AKTIVITAS ANTIJAMUR TERHADAP JAMUR CURVULARIA VERRUCULOSSA PENYEBAB PENYAKIT BERCAK DAUN PADA TANAMAN PADI (ORYZA SATIVA L.)","authors":"I. G. Bawa","doi":"10.24843/jchem.2021.v15.i01.p02","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p02","url":null,"abstract":"Eksplorasi bahan baku fungisida nabati untuk mengendalikan jamur Curvularia verruculosa penyebab penyakit bercak daun pada tanaman padi telah dilakukan. Dari 55 species tumbuhan yang diteliti menghasilkan 73 ekstrak etanol dari berbagai komponen tumbuhan. Beberapa ekstrak tumbuhan mampu menghambat pertumbuhan jamur C. verruculosa dengan sangat kuat, diantaranya ekstrak kulit kayu dan daun Michelia champaca dengan diameter zona hambatan masing-masing sebesar 30,07dan 22,07 mm, ekstrak kulit buah, daging buah dan daun Pangium edule Reinw (29,12;27,17; dan 20,16 mm), ekstrak daun Tamarindus indica L. (26,10 mm), ekstrak daun Michelia alba (26,03 mm) dan ekstrak daun Allamanda cathartica (23,00 mm). Hasil uji fitokimia menunjukkan bahwa mayoritas ekstrak tumbuhan yang memiliki daya hambat yang sangat kuat terhadap jamur C. verruculosa mengandung senyawa metabolit sekunder jenis terpenoid. \u0000Kata kunci: aktivitas antijamur, C. verruculossa, ekstrak tumbuhan, kandungan kimia ekstrak tumbuhan","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"32 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81656152","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p10
R. E. Adu, R. Roto, A. Kuncaka
Spectrophotometric determination of boron in food products by ester borate distillation into curcumin was studied. The sensitivity and selectivity of curcumin method were overcome by generating ester borate at proper temperature, time and pH. Boron was separated as triethyl borate by distillation in a vessel using ethanol solvent and reacted with curcumin. Distillation system reached optimum condition at temperature of 75oC and pH 5-6. Boron-curcumin complex was measured at 555 nm after 10 minutes of reaction. Separation of boron by distillation method complied with validation parameters. The standard curve was linier at concentration range of 1.2-4.8 ppm (R2=0.9995) and had molar extinction value (?) 4.7 x 105 L mol-1 cm-1 for high sensitivity level which is higher than the previous study. Percent recovery was found to be 96.09-104.92 %. Boron content in meatball and tofu products was in the range of 1.406-3.589 and 0.010-1.085 mg/kg. Ester borate distillation into curcumin has been successfully applied to the determination of boron in food products because of its high selectivity and sensitivity.
{"title":"SPECTROPHOTOMETRIC DETERMINATION OF BORON IN FOOD PRODUCTS BY ESTER BORATE DISTILLATION INTO CURCUMIN","authors":"R. E. Adu, R. Roto, A. Kuncaka","doi":"10.24843/jchem.2021.v15.i01.p10","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p10","url":null,"abstract":"Spectrophotometric determination of boron in food products by ester borate distillation into curcumin was studied. The sensitivity and selectivity of curcumin method were overcome by generating ester borate at proper temperature, time and pH. Boron was separated as triethyl borate by distillation in a vessel using ethanol solvent and reacted with curcumin. Distillation system reached optimum condition at temperature of 75oC and pH 5-6. Boron-curcumin complex was measured at 555 nm after 10 minutes of reaction. Separation of boron by distillation method complied with validation parameters. The standard curve was linier at concentration range of 1.2-4.8 ppm (R2=0.9995) and had molar extinction value (?) 4.7 x 105 L mol-1 cm-1 for high sensitivity level which is higher than the previous study. Percent recovery was found to be 96.09-104.92 %. Boron content in meatball and tofu products was in the range of 1.406-3.589 and 0.010-1.085 mg/kg. Ester borate distillation into curcumin has been successfully applied to the determination of boron in food products because of its high selectivity and sensitivity.","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90830808","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p16
P. J. D. A. Suartama, I. N. Wirajana, D. Putra
Lipase memainkan peranan penting dalam era industri green chemistry yang perlu dieksplorasi dari berbagai sumber untuk mengetahui kondisi optimum yang dibutuhkan agar diperoleh aktivitas enzim tertinggi. Tujuan penelitian ini adalah untuk menentukan jenis induser dalam media pertumbuhan, suhu dan konsentrasi ion kalsium (Ca2+) optimum lipase dari mikroba lipolitik tanah hutan mangrove pantai Suwung Kauh Bali. Mikroba lipolitik yang digunakan pada penelitian ini adalah mikroba lipolitik tunggal (ML.THM1) dan konsorsium mikroba lipolitik (KML.THM1) yang telah diisolasi dari tanah hutan mangrove. Pantai Suwung Kauh Bali pada penelitian sebelumnya. Mikroba lipolitik ditumbuhkan pada 3 (tiga) macam komposisi media yang berbeda dalam hal penambahan induser yaitu minyak zaitun (MSL.A), minyak jelantah (MSL.B) dan tanpa penambahan induser (MSL.C). Aktivitas lipase ditentukan dengan menggunakan metode titrasi asam basa. Jenis induser media pertumbuhan mikroba tunggal lipolitik dan konsorsium mikroba lipolitik yang optimum adalah minyak zaitun (MSL.A). Suhu optimum lipase dari konsorsium mikroba lipolitik tanah hutan mangrove (KML.THM1) adalah 37oC dengan aktivitas lipase sebesar 0,0667 ± 72,95 x 10-4 U/mL. Konsentrasi ion kalsium (Ca2+) optimum lipase dari konsorsium mikroba lipolitik (KML.THM1) pada suhu 37oC, 39oC, dan 41oC adalah 15 mM. Kata Kunci: ion kalsium, konsorsium mikroba, lipase, lipolitik, tanah hutan mangrove.
Lipase在绿色化学产业的时代发挥了关键作用，在不同的来源中进行探索，以确定获得最高酶活性所需的最佳条件。这项研究的目的是确定钙离子生长、温度和浓度(Ca2+)钙离子生长、温度和浓度的适中。研究中使用的利用政治微生物是一种单细胞政治微生物(ML.THM1)和一个从红树林森林土壤中分离出来的政治微生物联盟。苏旺卡巴里海滩的早期研究。利用各种不同的媒体成分来增加印度河(MSL.A)、jelantah (MSL.B)和不增加印度河(MSL.C)。脂肪酶的活性是通过碱酸滴法确定的。橄榄油(MSL.A)是一种政治微生物生长媒介的诱导物，其最佳政治微生物联盟是橄榄油(MSL.A)。红树林森林土壤中的微生物lipolitik联盟最佳温度脂肪酶的活动(KML。THM1)是37oC 0.0667大小的脂肪酶(±72.95×10 - 4 U / mL。含水层微生物联盟(Ca2+)中含羞草浓度(KML.THM1)为37oC、39oC和41oC是15毫米
{"title":"PENENTUAN INDUSER MEDIA PERTUMBUHAN, SUHU DAN KONSENTRASI ION KALSIUM OPTIMUM LIPASE DARI MIKROBA LIPOLITIK TANAH HUTAN MANGROVE PANTAI SUWUNG KAUH BALI","authors":"P. J. D. A. Suartama, I. N. Wirajana, D. Putra","doi":"10.24843/jchem.2021.v15.i01.p16","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p16","url":null,"abstract":"Lipase memainkan peranan penting dalam era industri green chemistry yang perlu dieksplorasi dari berbagai sumber untuk mengetahui kondisi optimum yang dibutuhkan agar diperoleh aktivitas enzim tertinggi. Tujuan penelitian ini adalah untuk menentukan jenis induser dalam media pertumbuhan, suhu dan konsentrasi ion kalsium (Ca2+) optimum lipase dari mikroba lipolitik tanah hutan mangrove pantai Suwung Kauh Bali. Mikroba lipolitik yang digunakan pada penelitian ini adalah mikroba lipolitik tunggal (ML.THM1) dan konsorsium mikroba lipolitik (KML.THM1) yang telah diisolasi dari tanah hutan mangrove. Pantai Suwung Kauh Bali pada penelitian sebelumnya. Mikroba lipolitik ditumbuhkan pada 3 (tiga) macam komposisi media yang berbeda dalam hal penambahan induser yaitu minyak zaitun (MSL.A), minyak jelantah (MSL.B) dan tanpa penambahan induser (MSL.C). Aktivitas lipase ditentukan dengan menggunakan metode titrasi asam basa. Jenis induser media pertumbuhan mikroba tunggal lipolitik dan konsorsium mikroba lipolitik yang optimum adalah minyak zaitun (MSL.A). Suhu optimum lipase dari konsorsium mikroba lipolitik tanah hutan mangrove (KML.THM1) adalah 37oC dengan aktivitas lipase sebesar 0,0667 ± 72,95 x 10-4 U/mL. Konsentrasi ion kalsium (Ca2+) optimum lipase dari konsorsium mikroba lipolitik (KML.THM1) pada suhu 37oC, 39oC, dan 41oC adalah 15 mM. \u0000Kata Kunci: ion kalsium, konsorsium mikroba, lipase, lipolitik, tanah hutan mangrove.","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"24 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91009540","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p15
I. Widihati, I. Apriliyanto, J. Sibarani
Modifikasi zeolit mangan dengan TiO2 sebagai filter gas buang kendaraan bermotor telah berhasil dibuat dengan mencampurkan zeolit mangan dan TiO2 serta Poly Vinyl Alcohol (PVA) sebagai perekat. Pembuatan filter dilakukan dengan metode reaksi padat-padat (solid State Reaction) kemudian dikarakterisasi struktur dan kristalinitas kristal menggunakan X-Ray Diffraction (XRD) dan morfologi serta komposisi kimia menggunakan Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS). Hasil karakterisasi XRD dan SEM-EDS menunjukan bahwa penambahan TiO2 tidak mempengaruhi struktur kristal dari zeolit mangan yang dapat dilihat dari tidak adanya perubahan dspacing yang spesifik dan tidak terjadi pergeseran sudut 2?, namun terjadi penurunan intensitas puncak difraksi yang menandakan adanya penurunan persen massa salah satu komponen zeolit mangan yakni SiO2. Selanjutnya dilakukan pengujian performa filter dalam penurunan kadar gas CO dan HC menggunakan Gas Analyzer dan Spektrofotometer Serapan Atom dalam pengukuran Pb. Hasil pengujian menunjukkan bahwa filter hasil modifikasi zeolit mangan dengan TiO2 dapat menurunkan kadar CO, HC dan Pb, dimana dengan filter tanpa penambahan TiO2 dan dengan penambahan TiO2 10 dan 20% secara berturut-turut menurunkan kadar CO sebesar 48,29; 58,14; 58,00%; kadar HC sebesar 27,83 ; 37,97 ; 45,81 % ; dan kadar Pb sebesar 90,74 ; 92,08 ; 93.48%. Kata kunci: Hidrokarbon, Karbonmonoksida, Timbal, TiO2, Zeolit mangan ABSTRACT Modification of manganese zeolite with TiO2 as a motor vehicle exhaust gas filter has been successfully made by mixing manganese zeolite and TiO2 and Poly Vinyl Alcohol (PVA) as an adhesive. Filtering was carried out by the solid state reaction method, the crystal structure and crystallinity were carried out by using X-Ray Diffraction (XRD) as well as the morphology and chemical composition determination were done by using Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS). The results of XRD and SEM-EDS meaurements showed that the addition of TiO2 did not affect the crystal structure of the manganese zeolite which could be seen from the absence of specific dspacing changes and no 2? angular shift, but there was a decrease in diffraction peak intensity which indicated a decrease in mass percentages of one component manganese zeolite namely SiO2. Furthermore, a test for filter performance in decreasing CO and HC gas contents was done using a Gas Analyzer and Atomic Absorption Spectrophotometer for Pb measurement. The results showed that the filter modification of manganese zeolite with TiO2 could reduce the contents of CO, HC and Pb, in which the filter without the addition of TiO2 and with the addition of 10 and 20% TiO2 decreased CO content by 48.29; 58,14; 58.00%; HC contents by 27.83; 37.97; 45.81%; and Pb content by 90.74; 92.08; 93.48% respectively. Keywords: Hydrocarbons, Carbonmonoxide, Manganese Zeolites, Lead, TiO2
{"title":"KARAKTERISASI ZEOLIT MANGAN TERMODIFIKASI TiO2 SERTA APLIKASINYA SEBAGAI FILTER GAS BUANG KENDARAAN BERMOTOR DALAM PENURUNAN KADAR GAS CO, HC, DAN Pb","authors":"I. Widihati, I. Apriliyanto, J. Sibarani","doi":"10.24843/jchem.2021.v15.i01.p15","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p15","url":null,"abstract":"Modifikasi zeolit mangan dengan TiO2 sebagai filter gas buang kendaraan bermotor telah berhasil dibuat dengan mencampurkan zeolit mangan dan TiO2 serta Poly Vinyl Alcohol (PVA) sebagai perekat. Pembuatan filter dilakukan dengan metode reaksi padat-padat (solid State Reaction) kemudian dikarakterisasi struktur dan kristalinitas kristal menggunakan X-Ray Diffraction (XRD) dan morfologi serta komposisi kimia menggunakan Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS). Hasil karakterisasi XRD dan SEM-EDS menunjukan bahwa penambahan TiO2 tidak mempengaruhi struktur kristal dari zeolit mangan yang dapat dilihat dari tidak adanya perubahan dspacing yang spesifik dan tidak terjadi pergeseran sudut 2?, namun terjadi penurunan intensitas puncak difraksi yang menandakan adanya penurunan persen massa salah satu komponen zeolit mangan yakni SiO2. Selanjutnya dilakukan pengujian performa filter dalam penurunan kadar gas CO dan HC menggunakan Gas Analyzer dan Spektrofotometer Serapan Atom dalam pengukuran Pb. Hasil pengujian menunjukkan bahwa filter hasil modifikasi zeolit mangan dengan TiO2 dapat menurunkan kadar CO, HC dan Pb, dimana dengan filter tanpa penambahan TiO2 dan dengan penambahan TiO2 10 dan 20% secara berturut-turut menurunkan kadar CO sebesar 48,29; 58,14; 58,00%; kadar HC sebesar 27,83 ; 37,97 ; 45,81 % ; dan kadar Pb sebesar 90,74 ; 92,08 ; 93.48%. \u0000Kata kunci: Hidrokarbon, Karbonmonoksida, Timbal, TiO2, Zeolit mangan \u0000ABSTRACT \u0000Modification of manganese zeolite with TiO2 as a motor vehicle exhaust gas filter has been successfully made by mixing manganese zeolite and TiO2 and Poly Vinyl Alcohol (PVA) as an adhesive. Filtering was carried out by the solid state reaction method, the crystal structure and crystallinity were carried out by using X-Ray Diffraction (XRD) as well as the morphology and chemical composition determination were done by using Electron Microscopy - Energy Dispersive Spectroscopy (SEM-EDS). The results of XRD and SEM-EDS meaurements showed that the addition of TiO2 did not affect the crystal structure of the manganese zeolite which could be seen from the absence of specific dspacing changes and no 2? angular shift, but there was a decrease in diffraction peak intensity which indicated a decrease in mass percentages of one component manganese zeolite namely SiO2. Furthermore, a test for filter performance in decreasing CO and HC gas contents was done using a Gas Analyzer and Atomic Absorption Spectrophotometer for Pb measurement. The results showed that the filter modification of manganese zeolite with TiO2 could reduce the contents of CO, HC and Pb, in which the filter without the addition of TiO2 and with the addition of 10 and 20% TiO2 decreased CO content by 48.29; 58,14; 58.00%; HC contents by 27.83; 37.97; 45.81%; and Pb content by 90.74; 92.08; 93.48% respectively. \u0000Keywords: Hydrocarbons, Carbonmonoxide, Manganese Zeolites, Lead, TiO2","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"119 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77462571","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p11
I. M. Siaka, I. B. S. Arimbawa, I. Sudiarta
Contamination of heavy metals on agricultural soil can have an impact on the quality of agricultural crops. This study aimed to determine the effect of the addition of cow manure on the bioavailability of heavy metals, Cu and Pb in agricultural soil and the content of those metals in spinach plants produced from the soil. The metals contents were obtained through the sequential extraction and wet digestion methods, followed by the measurement of metal concentration using an AAS tool (Shimadzu A 7000). In this study, it was found that the metal content of Cu and Pb in spinach plants whose soil was given fertilizer of cow manure was lower than that of the soil without fertilizer. The average content of Cu and Pb in all parts of the spinach plant without fertilizer application was 53.5985 ± 0.3943 and 59.7982 ± 2.8389 mg/kg, while those given the fertilizer were 41.7626 ± 1.3590 and 52.4335 ± 0.8434 mg/kg, respectively. The level of Cu and Pb bioavailabilities also decreased with the addition of the fertilizer. The number of Cu and Pb metals being bioavailable have decreased, while the metals which were potentially bioavailable have increased significantly. Therefore, the application of cow manure as fertilizer to the agricultural soil could reduce the bioavailability of Cu and Pb metals, and their accumulation in spinach plants, as well.
{"title":"KANDUNGAN LOGAM Cu DAN Pb DALAM TANAMAN BAYAM DAN BIOAVAILABILITASNYA DALAM TANAH PERTANIAN DENGAN PEMBERIAN PUPUK KANDANG SAPI","authors":"I. M. Siaka, I. B. S. Arimbawa, I. Sudiarta","doi":"10.24843/jchem.2021.v15.i01.p11","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p11","url":null,"abstract":"Contamination of heavy metals on agricultural soil can have an impact on the quality of agricultural crops. This study aimed to determine the effect of the addition of cow manure on the bioavailability of heavy metals, Cu and Pb in agricultural soil and the content of those metals in spinach plants produced from the soil. The metals contents were obtained through the sequential extraction and wet digestion methods, followed by the measurement of metal concentration using an AAS tool (Shimadzu A 7000). In this study, it was found that the metal content of Cu and Pb in spinach plants whose soil was given fertilizer of cow manure was lower than that of the soil without fertilizer. The average content of Cu and Pb in all parts of the spinach plant without fertilizer application was 53.5985 ± 0.3943 and 59.7982 ± 2.8389 mg/kg, while those given the fertilizer were 41.7626 ± 1.3590 and 52.4335 ± 0.8434 mg/kg, respectively. The level of Cu and Pb bioavailabilities also decreased with the addition of the fertilizer. The number of Cu and Pb metals being bioavailable have decreased, while the metals which were potentially bioavailable have increased significantly. Therefore, the application of cow manure as fertilizer to the agricultural soil could reduce the bioavailability of Cu and Pb metals, and their accumulation in spinach plants, as well.","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"40 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76882270","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p13
N. Oktapiani, I. Simpen, I. S. Negara
Penelitian tentang pembuatan komposit zeolit alam-TiO2/ZnO yang digunakan dalam proses fotodegradasi zat warna rhodamin B dan irradiasi sinar tampak telah dilakukan. Komposit yang terbentuk dikarakterisasi menggunakan metode BET (Bruneau, Emmet, dan Teller) untuk mengamati luas permukaan spesifik komposit, Fourier Tranform Infrared (FTIR) untuk menentukan gugus fungsi yang terkandung, dan metode titrasi asam-basa untuk mengetahui sifat asam-basa permukaan dan jumlah situs aktifnya. Karakteristik optimum diperoleh pada luas permukaan spesifik zeolit alam-TiO2/ZnO (3:1) sebesar 49.349 m2/g, dengan keasaman permukaan zeolit alam-TiO2/ZnO (3:1) adalah 2,9561±0,0586 mmol/g dengan jumlah situs aktif 1,7796 x 1021 atom/g. Uji fotodegradasi dari komposit zeolit alam-TiO2/ZnO (3:1) terhadap rhodamin B dengan irradiasi sinar tampak, optimum diperoleh pada konsentrasi awal 400 mg/L, waktu irradiasi 10 menit dan pH larutan 1, dengan persentase degradasi sebesar 99,30%. Kata kunci: fotodegradasi, irradiasi sinar tampak, rhodamin B, zeolit alam-TiO2/ZnO
{"title":"FOTODEGRADASI RHODAMIN B OLEH KATALIS ZEOLIT ALAM-TiO2/ZnO dan IRRADIASI SINAR TAMPAK","authors":"N. Oktapiani, I. Simpen, I. S. Negara","doi":"10.24843/jchem.2021.v15.i01.p13","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p13","url":null,"abstract":"Penelitian tentang pembuatan komposit zeolit alam-TiO2/ZnO yang digunakan dalam proses fotodegradasi zat warna rhodamin B dan irradiasi sinar tampak telah dilakukan. Komposit yang terbentuk dikarakterisasi menggunakan metode BET (Bruneau, Emmet, dan Teller) untuk mengamati luas permukaan spesifik komposit, Fourier Tranform Infrared (FTIR) untuk menentukan gugus fungsi yang terkandung, dan metode titrasi asam-basa untuk mengetahui sifat asam-basa permukaan dan jumlah situs aktifnya. Karakteristik optimum diperoleh pada luas permukaan spesifik zeolit alam-TiO2/ZnO (3:1) sebesar 49.349 m2/g, dengan keasaman permukaan zeolit alam-TiO2/ZnO (3:1) adalah 2,9561±0,0586 mmol/g dengan jumlah situs aktif 1,7796 x 1021 atom/g. Uji fotodegradasi dari komposit zeolit alam-TiO2/ZnO (3:1) terhadap rhodamin B dengan irradiasi sinar tampak, optimum diperoleh pada konsentrasi awal 400 mg/L, waktu irradiasi 10 menit dan pH larutan 1, dengan persentase degradasi sebesar 99,30%. \u0000Kata kunci: fotodegradasi, irradiasi sinar tampak, rhodamin B, zeolit alam-TiO2/ZnO","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75011745","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p05
I. Widihati, N. Saraswati, I. Dewi
Penelitian mengenai karakterisasi lempung bentonit termodifikasi surfaktan dan pemanfaatannya sebagai adsorben logam Cr dan Pb pada limbah cair industri tekstil telah dilakukan. Modifikasi dilakukan melalui metode interkalasi dengan menambahkan 2,9155 gram surfaktan heksadesil trimetil amonium bromida per 10 gram bentonit kemudian ditambahkan dengan 2,0480 gram asam palmitat. Bentonit yang telah termodifikasi dimanfaatkan sebagai adsorben ion Cr3+ dan Pb2+. Penelitian ini bertujuan untuk mengetahui karakteristik bentonit termodifikasi, waktu optimum dan kapasitas adsorpsi terhadap ion Cr3+ dan Pb2+ . Hasil penelitian menunjukan bahwa interkalasi hekasdesil trimetil amonium bromida ke dalam antar lapis lempung bentonit tidak menyebabkan perubahan kristalinitas bentonit. Ikatan antara surfaktan dengan kisi kristal bentonit ditunjukkan dengan vibrasi pada bilangan gelombang 2922,16 dan 2850,97 cm-1 yang merupakan vibrasi dari gugus CH2 amina. Luas permukaan spesifik bentonit termodifikasi ditentukan dengan metode adsorpsi metilen biru dan didapatkan luas permukaan spesifik sebesar 46,180 m2/g. Waktu optimum adsorpsi bentonit termodifikasi untuk ion Cr3+ dan Pb2+berturut-turut 20 dan 10 menit, dengan kapasitas adsorpsi untuk ion Cr3+ dan Pb2+berturut-turut sebesar 0,0277 (84,575%) mg/g dan 0,1350 (87,455%) mg/g. Kata kunci: adsorpsi, bentonit, interkalasi, limbah cair, logam berat
{"title":"KARAKTERISASI LEMPUNG BENTONIT TERMODIFIKASI SURFAKTAN DAN PEMANFAATANNYA SEBAGAI ADSORBEN LOGAM Cr DAN Pb PADA LIMBAH CAIR INDUSTRI TEKSTIL","authors":"I. Widihati, N. Saraswati, I. Dewi","doi":"10.24843/jchem.2021.v15.i01.p05","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p05","url":null,"abstract":"Penelitian mengenai karakterisasi lempung bentonit termodifikasi surfaktan dan pemanfaatannya sebagai adsorben logam Cr dan Pb pada limbah cair industri tekstil telah dilakukan. Modifikasi dilakukan melalui metode interkalasi dengan menambahkan 2,9155 gram surfaktan heksadesil trimetil amonium bromida per 10 gram bentonit kemudian ditambahkan dengan 2,0480 gram asam palmitat. Bentonit yang telah termodifikasi dimanfaatkan sebagai adsorben ion Cr3+ dan Pb2+. Penelitian ini bertujuan untuk mengetahui karakteristik bentonit termodifikasi, waktu optimum dan kapasitas adsorpsi terhadap ion Cr3+ dan Pb2+ . Hasil penelitian menunjukan bahwa interkalasi hekasdesil trimetil amonium bromida ke dalam antar lapis lempung bentonit tidak menyebabkan perubahan kristalinitas bentonit. Ikatan antara surfaktan dengan kisi kristal bentonit ditunjukkan dengan vibrasi pada bilangan gelombang 2922,16 dan 2850,97 cm-1 yang merupakan vibrasi dari gugus CH2 amina. Luas permukaan spesifik bentonit termodifikasi ditentukan dengan metode adsorpsi metilen biru dan didapatkan luas permukaan spesifik sebesar 46,180 m2/g. Waktu optimum adsorpsi bentonit termodifikasi untuk ion Cr3+ dan Pb2+berturut-turut 20 dan 10 menit, dengan kapasitas adsorpsi untuk ion Cr3+ dan Pb2+berturut-turut sebesar 0,0277 (84,575%) mg/g dan 0,1350 (87,455%) mg/g. \u0000Kata kunci: adsorpsi, bentonit, interkalasi, limbah cair, logam berat","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77936846","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 : 2021-01-31DOI: 10.24843/jchem.2021.v15.i01.p08
M. Manurung, A. A. Putra, I. Oktavia
Arang aktif merupakan adsorben multifungsi, dapat menyerap spesi yang bermuatan positif seperti ion logam, molekul netral seperti I2 dan bermuatan negatif. Tujuan penelitian adalah membuat arang aktif dari limbah bambu yang berguna meminimalisir kandungan logam timbal (II) dan krom (III) dari perairan. Pembuatan arang dilakukan secara konvensional menggunakan tong kedap udara dengan pemanasan selama 12 jam. Aktivasi arang dilakukan menggunakan tanur pada suhu 650oC selama 4 jam. Hasil penelitian menunjukkan bahwa aktivasi termal menghasilkan arang aktif lebih baik dibandingkan tanpa aktivasi. Arang yang diaktivasi dan tanpa aktivasi memenuhi SNI 06-3730-1995 tentang arang aktif teknis. Luas permukaan sebesar 494,8178 m2/g, keasaman permukaan sebesar 4,4426 mmol/g, dan kebasaan permukaan sebesar 3,4467 mmol/g. Kondisi optimum adsorpsi terhadap ion logam yaitu waktu kontak 24 jam dan pH 8 untuk Pb(II) dan pH 6 untuk Cr(III). Kapasitas adsorpsi arang aktif sebesar 3,9800 mg/g untuk ion Pb(II) dan 3,9766 mg/g untuk ion Cr(III).
{"title":"PREPARASI ARANG BAMBU DENGAN METODE KONVENSIONAL, AKTIVASI TERMAL DAN KARAKTERISASI SERTA APLIKASINYA SEBAGAI ADSORBEN LOGAM Pb(II) DAN Cr(III)","authors":"M. Manurung, A. A. Putra, I. Oktavia","doi":"10.24843/jchem.2021.v15.i01.p08","DOIUrl":"https://doi.org/10.24843/jchem.2021.v15.i01.p08","url":null,"abstract":"Arang aktif merupakan adsorben multifungsi, dapat menyerap spesi yang bermuatan positif seperti ion logam, molekul netral seperti I2 dan bermuatan negatif. Tujuan penelitian adalah membuat arang aktif dari limbah bambu yang berguna meminimalisir kandungan logam timbal (II) dan krom (III) dari perairan. Pembuatan arang dilakukan secara konvensional menggunakan tong kedap udara dengan pemanasan selama 12 jam. Aktivasi arang dilakukan menggunakan tanur pada suhu 650oC selama 4 jam. Hasil penelitian menunjukkan bahwa aktivasi termal menghasilkan arang aktif lebih baik dibandingkan tanpa aktivasi. Arang yang diaktivasi dan tanpa aktivasi memenuhi SNI 06-3730-1995 tentang arang aktif teknis. Luas permukaan sebesar 494,8178 m2/g, keasaman permukaan sebesar 4,4426 mmol/g, dan kebasaan permukaan sebesar 3,4467 mmol/g. Kondisi optimum adsorpsi terhadap ion logam yaitu waktu kontak 24 jam dan pH 8 untuk Pb(II) dan pH 6 untuk Cr(III). Kapasitas adsorpsi arang aktif sebesar 3,9800 mg/g untuk ion Pb(II) dan 3,9766 mg/g untuk ion Cr(III).","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"66 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85799112","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 : 2019-07-31DOI: 10.24843/jchem.2019.v13.i02.p01
N. K. Wiradnyani, I. M. M. Arimathea
Sinom drinks mixed with lime and honey are made from rhizome of turmeric and young tamarind leaves which are added with lime juice and honey. The aim of the study was to determine the effect of antioxidant compounds of ethyl acetate on sinom drinks mixed with lime juice and honey (SCJM) various doses on fasting blood sugar spraque dawley (SD) white rats diabetes mellitus. Experimental research using RAK, ANOVA analysis with further BNT testing consisted of two stages: 1) test the antioxidant capacity of various solvents of SCJM yielding 29691.1 µg AAEAC / g ingredients namely the highest number of ethyl acetate fractions of n- hexane, chloroform, and water. Phase 2 Ethyl acetate fraction of SCJM was further tested in vivo to SD white rats with diabetes mellitus with various doses, namely: control (-) normal mice, 50, 100, 150, 200 mg/dl BW, control (+) of diabetic rats. The results of the study of the effect of the antioxidant compound SCJM ethyl acetate fraction of various doses significantly affected (p <0.01) in decreasing fasting blood sugar (GDP) white SD diabetes mellitus rats, a dose that can reduce the lowest GDP based on statistical tests is 150 mg/kg BW of rats, 168.4 mg/dl from other doses. Keywords: ethylacetate, blood sugar, antioxidant, sinom
{"title":"EFEK ANTIOKSIDAN FRAKSI ETIL ASETAT MINUMAN SINOM CAMPURAN JERUK NIPIS DAN MADU (curcuma domestica val-tamarindus indica L.) TERHADAP GULA DARAH TIKUS PUTIH SPRAQUE DAWLEY DIABETES MELITUS","authors":"N. K. Wiradnyani, I. M. M. Arimathea","doi":"10.24843/jchem.2019.v13.i02.p01","DOIUrl":"https://doi.org/10.24843/jchem.2019.v13.i02.p01","url":null,"abstract":"Sinom drinks mixed with lime and honey are made from rhizome of turmeric and young tamarind leaves which are added with lime juice and honey. The aim of the study was to determine the effect of antioxidant compounds of ethyl acetate on sinom drinks mixed with lime juice and honey (SCJM) various doses on fasting blood sugar spraque dawley (SD) white rats diabetes mellitus. Experimental research using RAK, ANOVA analysis with further BNT testing consisted of two stages: 1) test the antioxidant capacity of various solvents of SCJM yielding 29691.1 µg AAEAC / g ingredients namely the highest number of ethyl acetate fractions of n- hexane, chloroform, and water. Phase 2 Ethyl acetate fraction of SCJM was further tested in vivo to SD white rats with diabetes mellitus with various doses, namely: control (-) normal mice, 50, 100, 150, 200 mg/dl BW, control (+) of diabetic rats. The results of the study of the effect of the antioxidant compound SCJM ethyl acetate fraction of various doses significantly affected (p <0.01) in decreasing fasting blood sugar (GDP) white SD diabetes mellitus rats, a dose that can reduce the lowest GDP based on statistical tests is 150 mg/kg BW of rats, 168.4 mg/dl from other doses. \u0000Keywords: ethylacetate, blood sugar, antioxidant, sinom","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90511883","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 : 2019-07-31DOI: 10.24843/jchem.2019.v13.i02.p09
M. B. O. Rastini, N. K. M. Giantari, K. D. Adnyani, N. Laksmiani
Breast cancer can be initiated by either overexpression of HER-2 protein which can induce dimerization and autophosphorylation so that it triggers the activation of Focal Adhesion Kinase (FAK) resulting in migration and metastasis in breast cancer cells. Quercetin which has another name 3,5,7,3 ', 4'-pentahydroxyflavon with the molecular formula of (C15H10O7) is a flavonoid compound which is very widely found in nature. The purpose of this study was to determine the mechanism of inhibition of overexpression of HER-2 proteins by quercetin compounds by in silico molecular docking. In silico molecular docking was carried out in several stages namely method validation, optimization of 3D quercetin compound structure, docking between quercetin compounds optimized with HER-2 protein based on bond energy parameters the lower the bond energy the stronger and the more stable the bond is. The results of docking expressed by the binding energy of quercetin compounds with HER-2 protein are -8.24 kcal / mol, while the energy of the native ligand bond with HER-2 protein is -10.45 kcal / mol. The bonding energy shows that quercetin compounds have the potential as breast anticancer because they can modulate the overexpression of HER-2 proteins. Keywords: quercetin, breast cancer, HER-2, in silico
{"title":"MOLECULAR DOCKING AKTIVITAS ANTIKANKER DARI KUERSETIN TERHADAP KANKER PAYUDARA SECARA IN SILICO","authors":"M. B. O. Rastini, N. K. M. Giantari, K. D. Adnyani, N. Laksmiani","doi":"10.24843/jchem.2019.v13.i02.p09","DOIUrl":"https://doi.org/10.24843/jchem.2019.v13.i02.p09","url":null,"abstract":"Breast cancer can be initiated by either overexpression of HER-2 protein which can induce dimerization and autophosphorylation so that it triggers the activation of Focal Adhesion Kinase (FAK) resulting in migration and metastasis in breast cancer cells. Quercetin which has another name 3,5,7,3 ', 4'-pentahydroxyflavon with the molecular formula of (C15H10O7) is a flavonoid compound which is very widely found in nature. The purpose of this study was to determine the mechanism of inhibition of overexpression of HER-2 proteins by quercetin compounds by in silico molecular docking. In silico molecular docking was carried out in several stages namely method validation, optimization of 3D quercetin compound structure, docking between quercetin compounds optimized with HER-2 protein based on bond energy parameters the lower the bond energy the stronger and the more stable the bond is. The results of docking expressed by the binding energy of quercetin compounds with HER-2 protein are -8.24 kcal / mol, while the energy of the native ligand bond with HER-2 protein is -10.45 kcal / mol. The bonding energy shows that quercetin compounds have the potential as breast anticancer because they can modulate the overexpression of HER-2 proteins. \u0000 \u0000Keywords: quercetin, breast cancer, HER-2, in silico","PeriodicalId":17780,"journal":{"name":"Jurnal Kimia","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88043149","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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