Garuda - Garba Rujukan Digital

Pre-treatment of Used-Cooking Oil as Feed Stocks of Biodiesel Production by Using Activated Carbon and Clay Minerals Syah Putra, Rudy; Shabur Juliantoa, Tatang; Hartono, Puji; Dyah Puspitasaria, Ratih; Kurniawan, Angga
International Journal of Renewable Energy Development Vol 3, No 1 (2014): February 2014
Publisher : Center of Biomass & Renewable Energy, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ijred.3.1.33-35

Many low-cost feedstock i.e. used-cooking oil (UCO) for the production of biodiesel fuel (BDF) has contained a large amount of water and high proportion of free fatty acids (FFAs). Therefore, a pre-treatment process to reduce the water content (<0.1 wt.%) and FFAs (<2.0 wt.%) were necessary in order to avoid an undesirable side reactions, such as saponification, which could lead to serious problem of product separation and low fatty acid methyl ester (FAME) yield. . In this study, a pre-treatment process of used cooking oil as a feedstock for the production of BDF by using various adsorbents such as Activated Carbon (AC) and various clay minerals, for example Smectite (S), Bentonite (B), Kaolinite (K), and Powdered Earthenware (PE) were evaluated. The oil obtained from pre-treatment was compared with oil without pre-treatment process. In this study, we reported a basic difference in material ability to the oil, depending on the adsorption condition with respect to the physico-chemical parameters, e.g. refractive index (R), density (Ï), FFAs, and water content (W). The results showed that the water content and FFAs in the oil has decreased when using AC as an adsorbent compared with clay minerals. However, the refractive index of oil has similar with the oil without pre-treatment process as well; meanwhile, the density of oil has increased after the pre-treatment process by using clay minerals.

Pengaruh Variasi Berat Kitosan sebagai Katalis Basa Heterogen pada Reaksi Transesterifikasi Minyak Jelantah Tatang Shabur Julianto
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 12, ISSUE 2, August 2011
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar

Telah dilakukan penelitian tentang pengaruh berat variasi dari kitosan sebagai katalis basa heterogen pada reaksi transesterifikasi minyak jelantah. Proses transesterifikasi dilakukan dengan mereaksikan minyak jelantah dan metanol dengan variasi berat kitosan sebagai katalis yaitu sebanyak 1 g, 2 g, 3 g. Proses transesterifikasi dilakukan pada rasio mol minyak jelantah : metanol yaitu 1:9 dengan asumsi bahwa minyak jelantah didominasi oleh POO. Larutan direfluks pada temperatur 60°C dengan pengadukan yang dijaga konstan. Metil ester yang dihasilkan dianalisis menggunakan GC-MS. Penelitian ini menunjukkan bahwa reaksi transesterifikasi memberikan hasil optimal dengan rendemen 22,5 % (b/b) dengan menggunakan 1 g kitosan. Kata kunci :Transesterifikasi, minyak jelantah, kitosan, GC-MS.

Utilization of Waste Extracts Residual Tobacco Cigarette Manufacturing and Leaves of Mahkota Dewa as a Natural Pesticide for Pest Control Armyworms in Chili Plant Cahyati Cahyati; Marlina Marlina Marlina; Rizqy Nurlestari Nurlestari; Indrasti Dwi Puji lestari; Tatang Shabur Julianto
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 16, ISSUE 2, August 2016
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol16.iss2.art2

The use of pesticides is still considered behind a great benefit for increasing agricultural production. Quite high negative impact of the use of synthetic pesticides to encourage efforts to pursue the empowerment of natural pesticide as alternative to synthetic pesticides. On tobacco and leaves of mahkota dewa found a substance alkaloid that can help ward off attacks, especially armyworm. Has conducted research utilization of waste residual tobacco cigarette manufacturing at a company and leaves of mahkota dewa as a natural pesticide to eradicate the armyworm. The residual tobacco cigarette manufacturing and leaves of mahkota dewa isolated manner extracted with an organic solvent so that the resulting crude extract alkaloids. The resulting crude alkaloid used as a pesticide solution sprayed on the leaves of chili to eradicate the pest armyworms. Test result showed that the insecticidal activity of alkaloid extract concentration of 1,6 ppm has the highest insecticidal activity. However, engaging both the alkaloid extract provides insecticidal activity is lower than the alkaloid extract of leaves of mahkota dewa so that the most effective in the use of alkaloid extract of leaves of mahkota dewa. Identification of the alkaloid compounds have been analyzed by TLC. This analysis showed that compound in waste of tobacco cigarette manufacture is nicotine and triterpenoids whereas the alkaloid extract of the leaves of mahkota dewa form of narcotic

Production of Bioethanol from Rice Straw Assisted by Cellulosic Enzyme Oyster Mushroom Stem Using Simultaneous Saccharification and Fermentation (SSF) Tatang Shabur Julianto; M. Arsyik Kurniawan S; Ikhwan Arifin
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 19, ISSUE 2, August 2019
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/eksakta.vol19.iss2.art9

Bioethanol is an alternative energy source to replace fossil fuels that can be produced from agricultural waste such as rice straw. The fermentation process can help hydrolyze lignocellulosic compounds in rice straw into simple sugars and convert them into bioethanol. This study aims to determine the effect of fermentation time and the amount of intracellular cellulase enzyme extract from oyster mushroom stem on the levels of biethanol produced. The method used in making bioethanol is Simultaneous Saccharification and Fermentation (SSF). The bioethanol produced was then analyzed by gas chromatography and UV-Vis spectrophotometer. The result showed that the highest level of bioethanol was 14.52% obtained at 10 days fermentation time and the amount of cellulase enzyme extract was 25 mL.

Identification and Heme Polymerization Inhibition Activity (HPIA) Assay of Ethanolic Extract and Fraction of Temu Mangga (Curcuma mangga Val.) Rhizome Dhina Fitriastuti; Tatang Shabur Julianto; Annisa Wahyu Nur Iman
EKSAKTA: Journal of Sciences and Data Analysis VOLUME 1, ISSUE 1, February 2020
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20885/EKSAKTA.vol1.iss1.art10

Curcuma mangga Val. is one of Indonesian herbs from Zingiberaceae family that is under explored and could contain potentially active substances to serve as an antimalarial. This research intends not only to examine the antimalarial activity by means of heme polymerization inhibitor mechanism by using the ethanolic extract and fraction of Curcuma mangga Val. but also to identify its compound classification. The extract of temu manga was obtained by Soxhlet extraction method using ethanol solvent followed by fractionation using Vacuum Liquid Chromatography with solvent sequence n-hexane, n-hexane: ethyl acetate (2:1), ethyl acetate and ethanol. The extract and fraction were analyzed by using LC-MS and GC-MS. Activities of hem polymerization inhibition showed by IC50 values which were obtained from analysis of relationship between concentration sample and the percentage of inhibition using the PROBIT on statistical software. The result of HPIA assay shows that the IC50 value of ethanolic extract and ethanolic fraction of Curcuma mangga Val. rhizome are 2.273 and 1.479 mg/mL, respectively. It clearly shows that the heme polymerization inhibition activity of ethanolic fraction relatively better than that of ethanolic extract. Phytochemical screening determines the ethanolic extract contains saponin, terpenoid, and phenol while the ethanolic fraction contains terpenoid. Thus, terpenoid compound is presumed to be the inhibitor of heme polymerization. The results of analysis with LC-MS and GC-MS showed that the active compounds suspected to inhibit heme polymerization in ethanolic extract and fraction were (E) -labda-8 (17), 12-dien-15,16-dial and di-n-octyl phthalate, respectively. Keywords: antimalarial, Curcuma mangga Val., heme polymerization

Molecular Interaction Analysis of COX-2 Against Aryl Amino Alcohol Derivatives from Isoeugenol as Anti Breast Cancer using Molecular Docking Zulfa Zuhrufa; Tatang Shabur Julianto
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.10324.581-587

Breast cancer occurs due to uncontrolled cells proliferation. The Proliferation causes severe inflammatory which can be the initial stages of cancer symptoms. Aryl amino alcohol compounds from isoeugenol derivatives are proposed for the potential drugs of breast cancer. This study was conducted on iso-eugenol derivatives by adding carbonyl groups, hydroxyl groups, halide compounds and amines to determine the effect on anticancer activity through molecular docking studies. The molecular docking approach is carried out to see the interaction of ligands with protein compounds by using the minimized ligand energy bind with protein active site using protein data bank ID 5GMN. The docking result show that IE-Benzanilide-Cl (11) and IE-Benzanilide-OH (10) have the lowest binding energy (−8.3 kcal/mol and −8.6 kcal/mol) compare to another compounds. AdmetSAR computer simulations show that all compounds have very few toxic effects. The use of aryl amino alcohol derivatives (10 and 11) may be suggested as anti-breast cancer drugs. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Hydrocracking of Crude Palm Oil over Bimetallic Oxide NiO-CdO/biochar Catalyst Allwar Allwar; Rina Maulina; Tatang Shabur Julianto; Annisa Ayu Widyaningtyas
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.14074.476-485

The bimetallic oxide NiO-CdO/biochar catalyst was prepared by coprecipitation and calcination methods. Characterizations of catalyst were carried out using Fourier Transform Infra Red (FTIR), Surface Area Analyzer (SAA), X-ray Diffraction (XRD), and Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) mapping methods. The catalyst showed a good average crystalized size of 12.30 nm related to the nanoparticles and high dispersion of Ni and Cd metals on the biochar surface. Analysis of liquid fuel products was observed using Gas Chromatography - Mass Spectrometry (GC-MS) which was separated to the main product of gasoline fraction (C6–C10), and the second product of kerosene fraction (C11–C16), and diesel fraction (C17–C23). The presence of the catalyst in the hydrocracking resulted in more liquid product of 56.55 wt% than the thermal cracking with a liquid product of 20.55 wt%. The best performance activity of catalyst was found at a temperature of 150 °C with high selectivity to hydrocarbon fuel with 12 types of gasoline fractions (39.24 wt%) compared to gasoline fractions obtained at higher hydrocracking temperatures of 250 °C and 350 °C. The results of this study showed that the bimetallic oxide catalyst supported with biochar from palm kernel shell plays an important role in the hydrocracking process to increase the selectivity of the gasoline fraction. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Hydrocracking of Crude Palm Oil over Bimetallic Oxide NiO-CdO/biochar Catalyst Allwar Allwar; Rina Maulina; Tatang Shabur Julianto; Annisa Ayu Widyaningtyas
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 2 Year 2022 (June 2022)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.2.14074.476-485

The bimetallic oxide NiO-CdO/biochar catalyst was prepared by coprecipitation and calcination methods. Characterizations of catalyst were carried out using Fourier Transform Infra Red (FTIR), Surface Area Analyzer (SAA), X-ray Diffraction (XRD), and Scanning Electron Microscope-Energy Dispersive X-ray (SEM-EDX) mapping methods. The catalyst showed a good average crystalized size of 12.30 nm related to the nanoparticles and high dispersion of Ni and Cd metals on the biochar surface. Analysis of liquid fuel products was observed using Gas Chromatography - Mass Spectrometry (GC-MS) which was separated to the main product of gasoline fraction (C6–C10), and the second product of kerosene fraction (C11–C16), and diesel fraction (C17–C23). The presence of the catalyst in the hydrocracking resulted in more liquid product of 56.55 wt% than the thermal cracking with a liquid product of 20.55 wt%. The best performance activity of catalyst was found at a temperature of 150 °C with high selectivity to hydrocarbon fuel with 12 types of gasoline fractions (39.24 wt%) compared to gasoline fractions obtained at higher hydrocracking temperatures of 250 °C and 350 °C. The results of this study showed that the bimetallic oxide catalyst supported with biochar from palm kernel shell plays an important role in the hydrocracking process to increase the selectivity of the gasoline fraction. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Molecular Interaction Analysis of COX-2 Against Aryl Amino Alcohol Derivatives from Isoeugenol as Anti Breast Cancer using Molecular Docking Zulfa Zuhrufa; Tatang Shabur Julianto
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 3 Year 2021 (September 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.3.10324.581-587

Breast cancer occurs due to uncontrolled cells proliferation. The Proliferation causes severe inflammatory which can be the initial stages of cancer symptoms. Aryl amino alcohol compounds from isoeugenol derivatives are proposed for the potential drugs of breast cancer. This study was conducted on iso-eugenol derivatives by adding carbonyl groups, hydroxyl groups, halide compounds and amines to determine the effect on anticancer activity through molecular docking studies. The molecular docking approach is carried out to see the interaction of ligands with protein compounds by using the minimized ligand energy bind with protein active site using protein data bank ID 5GMN. The docking result show that IE-Benzanilide-Cl (11) and IE-Benzanilide-OH (10) have the lowest binding energy (−8.3 kcal/mol and −8.6 kcal/mol) compare to another compounds. AdmetSAR computer simulations show that all compounds have very few toxic effects. The use of aryl amino alcohol derivatives (10 and 11) may be suggested as anti-breast cancer drugs. Copyright © 2021 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).

Title

Found 9 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 9 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 9 Documents
Search