Garuda - Garba Rujukan Digital

p-Index From 2020 - 2025

2.504

P-Index

This Author published in this journals

All Journal Journal of Tropical Life Science : International Journal of Theoretical, Experimental, and Applied Life Sciences JURNAL KIMIA SAINS DAN APLIKASI Teknotan: Jurnal Industri Teknologi Pertanian Jurnal Ilmu Kimia Universitas Brawijaya Bulletin of Chemical Reaction Engineering & Catalysis Journal of Innovation and Applied Technology Jurnal Pembangunan dan Alam Lestari Natural B The Journal of Pure and Applied Chemistry Research Jurnal Penelitian Pendidikan IPA (JPPIPA) Indonesian Journal of Chemistry Indonesian Food Science and TechnologyJournal Media Akuakultur Makara Journal of Science Bulletin of Chemical Reaction Engineering & Catalysis

Siti Mariyah Ulfa

Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Brawijaya University, Jl. Veteran, Malang 65145, Indonesia

Author-ID : 407432

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Engineering Environmental Science Materials Science & Nanotechnology Medicine & Pharmacology Physics Other

Published : 46 Documents Claim Missing Document

Claim Missing Document

Articles

1 2 3 4 5

Pembuatan Pupuk Organik Cair Berbasis Limbah Padat Biogas Pada Peternak Sapi Perah Sekar Sari "Setia Kawan" Desa Tutur Kabupaten Pasuruan Siti Mariyah Ulfa; Lukman Hakim; Sutrisno Sutrisno
Journal of Innovation and Applied Technology Vol 4, No 1 (2018)
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Brawijaya

Pengenalan pembuatan pupuk organik cair dari limbah padat biogas yang diperkaya oleh unsur Nitrogen (N) telah dilakukan pada peternak sapi perah di Desa Tutur Kabupaten Pasuruan. Desa Tutur. Pupuk organik cair diproduksi dengan menggunakan fermentor portabel kapasitas 60 L dan difermentasi selama 21-30 hari. Bahan dasar yang digunakan adalah limbah padat biogas, air dan starter EM4. Hasil analisis pupuk cair yang dibuat dengan perbandingan limbah biogas dan air 1:5 menunjukkan peningkatan kadar unsur N dari 0,77% menjadi 1,16%. Pupuk yang dihasilkan digunakan oleh peternak untuk budidaya rumput gajah dan tanaman bungan krisan.

Ni / MgO Bifunctional Catalyst for Condensation and Furfural Hydrogenation Reactions in One Stage Produce Alkana C8-C13 Derived Compounds Siti Mariyah Ulfa; Indah Nur Pramesti
Natural B, Journal of Health and Environmental Sciences Vol 3, No 2 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Ni/MgO catalyst has been designed as bifunctional catalyst for condensation reaction of furfural and acetone followed by hydrogenation reaction to produce C8-C13 alkane derivatives in one step reaction. Ni/MgO catalyst was prepared by wet impregnation methods using Ni(NO3)2.6H2O and MgO as supporting material. The charcterization by X-ray diffraction (XRD) showed the characteristic of Ni on 2q = 44,27o; 51,59o and 75,89o. Isoterm adsorpsi using N2 gas gave the decreasing surface area of MgO and forming microporous structure. The activity test of the catalyst was carried out using furfural and acetone (1:1) in autoclave bath system, heated at 100-180oC for 7-8 hours in the presence of water. Ni/MgO catalyst showed the good activity when hydrogenation reaction performed at 150oC lead to the conversion of alkane derivatives in 95.69%. Characterization of the product by GC-MS showed the formation of 4-(2-furanyl)-2-butanone; 1,5-di(2-furanyl)-3-pentanone and 1,5-di(2-furanyl)-3-(1-pentenone) from reduction of C=C alkene of furfurylidene acetone.

Activity Test Ni/ZrO2-SiO2 Catalyst for Hydrodeoxygenation Reactions Mixtures the Furfurylidene Acetone Compound (FAc) and Difurfurylidene Acetone (F2Ac) Dita Prihartini; Siti Mariyah Ulfa; Elvina Dhiaul Iftitah
Natural B, Journal of Health and Environmental Sciences Vol 3, No 3 (2016)
Publisher : Natural B, Journal of Health and Environmental Sciences

Hydrodeoxygenation (HDO) reaction of furfural derivatives have widely studied because these reaction produce saturated alkane which potensial for renewable fuels. Nickel based catalyst impregnated in to ZrO2-SiO2 (Ni/ZrO2-SiO2) was prepared and its activity is evaluated for HDO of furfurilidene aceto (FAc) and difurfurilidene acetone (F2Ac). Ni/ZrO2-SiO2 catalys was prepared from Ni(NO3)2.6H2O with 10% Ni loading over ZrO2-SiO2 by wet impregnation method. Characterization using X-ray showed the diffraction of Ni detected at 2θ = 44.42, 51.73, and 76.26. Catalyst activity for HDO of FAc and F2Ac was carried out at 200oC for 2 hours in batch system. According to gas chromatography analysis, the conversion of product is 100% with selectivity for 2-octanol and dodeka-6-ene is 88,22% and 2,99%, respectively.

Synthesis of 2-Methoxy-3H-Azepine Derived Compounds Through the Thermal Reaction between Alkylnitrobenzene and Tributylphosphine Siti Mariyah Ulfa; Hideki Okamoto; Kyosuke Satake
Natural B, Journal of Health and Environmental Sciences Vol 3, No 1 (2015)
Publisher : Natural B, Journal of Health and Environmental Sciences

Although photolysis of phenyazide has been widely reported to give 3H-azepine, the thermal deoxygenation reaction of alkylnitrobenzene derived similar products hitherto unexplored. Novel synthesis of 2-methoxy-3H-azepine derivatives was carried out using alkylnitrobenzene with tributylphosphine (Bu3P) reacted at 150°C for 24 hours in the presence of methanol. Reaction of m-nitrobenzene with the above methods gave two isomers of 3H-azepine, namely, 2-methoxy-6-methyl-3H-azepine and 2-methoxy-4-methyl-3H-azepine in 61%. Reaction of 2,3-dimethylnitrobenzene with Bu3P afforded the three isomers, that is, 2-methoxy-6,7-dimethyl-3H-azepine; 2-methoxy-3,4-dimethyl-3H-azepine and 7-methoxy-5,6-dimethyl-4H-azepine. Reaction of 3,5-dimethylnitrobenzene gave the sole product of 2-methoxy-4,6-dimethyl-3H-azepine in 42%. In contrast, reaction of 2,6-dimethylnitrobenzene didn’t give any product because the steric effect of methyl groups attached on C2 and C6. Structure elucidation of all novel products have confirmed by HETCOR.

Effect of Hydration and Oxidation Reactions of The Chemical Composition of Kaffir lime (Cytrus hystrix DC.) Oil Warsito Warsito; Edi Priyo Utomo; Siti Mariyah Ulfa
The Journal of Pure and Applied Chemistry Research Vol 5, No 2 (2016)
Publisher : Chemistry Department, The University of Brawijaya

This research aims to determine changes of the chemical composition in the hydration and oxidation reaction of Kaffir lime (Cytrus hystrix DC.) oil. The hydration reaction was carried out using a Amberlyst catalyst with variation time for 1.5, 3, and 4.5 hours. Furthermore, the oxidation process was carried out using PCC catalyst with variation time for 1, 1.5, and 3 hours. Then, the analysis of chemical composition was performed using GC-MS. The results showed that hydration reaction process for 1,5 hours has changed monoterpenes micrene and b-ocimen turned into linalool and it changes citronellal to be linalool, citronellol and dimer ether citronellyl citronellol. The longer process of hydration tends to increase the dimer ether citronellyl citronellol products. Within that process, it has turned citronellal into isopulegol and isopulegone. The longer oxidation will decrease isopulegone products.

Chemical Potential of Benzene Fluid from Monte Carlo Simulation with Anisotropic United Atom Model Mahfuzh Huda; Siti Mariyah Ulfa; Lukman Hakim
The Journal of Pure and Applied Chemistry Research Vol 2, No 3 (2013)
Publisher : Chemistry Department, The University of Brawijaya

The profile of chemical potential of benzene fluid has been investigated using Anisotropic United Atom (AUA) model. A Monte Carlo simulation in canonical ensemble was done to obtain the isotherm of benzene fluid, from which the excess part of chemical potential was calculated. A surge of potential energy is observed during the simulation at high temperature which is related to the gas-liquid phase transition. The isotherm profile indicates the tendency of benzene to condensate due to the strong attractive interaction. The results show that the chemical potential of benzene rapidly deviates from its ideal gas counterpart even at low density.

Hydrogenation/Deoxygenation (H/D) Reaction of Furfural-Acetone Condensation Product using Ni/Al2O3-ZrO2 Catalyst Adam Mahfud; Siti Mariyah Ulfa; Edi Priyo Utomo
The Journal of Pure and Applied Chemistry Research Vol 5, No 2 (2016)
Publisher : Chemistry Department, The University of Brawijaya

The catalytic hydrogenation/deoxygenation (H/D) reaction was carried out using Ni/Al2O3-ZrO2 catalyst. The 10% (wt/wt) of Ni were impregnated on Al2O3-ZrO2 (10NiAZ) by wet impregnation method followed by calcination and reduction. X-Ray diffraction analysis showed that Nideposited on the surface, with specific surface areas (SBET) was 48.616 m2/g. Catalyst performance were evaluated for H/D reaction over furfural-acetone condensation products, mixture of 2-(4-furyl)-3-buten-2-on and 1,5-bis-(furan-2-yl)-pentan-3-one. The reaction was carried out in a batch, performed at 150°C for 8 hours. The H/D reaction gave alkane derivatives C8 and C10 by hydrogenation process followed by ring opening of furan in 15.2% yield. While, oxygenated product C10-C13 were also detected in 17.2% yield. The increasing of pore volume of 10NiAZ might enhance catalyst activity over H/D reaction. The alkene C=C bond was easy to hydrogenated under this condition by the lower bond energy gap.

Synthesis and Characterization of Polyaniline Nanoparticle by Inverse Micelle Microemulsion Method Nuraini Uswatun Chasana; Siti Mariyah Ulfa; Masruri MASRURI
The Journal of Pure and Applied Chemistry Research Vol 6, No 3 (2017): Edition of September - December 2017
Publisher : Chemistry Department, The University of Brawijaya

Polyaniline (PANI) is a conductive polymer and potential for application in the electronic device manufacturing. This paper discloses a recent strategy in synthesis polyaniline nanoparticle (NP-PANI) using inverse micelle (IM) microemulsion method, and also characterization of the provided products. The synthesis step was conducted by mixing of aniline as a polymer precursor with PEG 400, n-hexane, n-butanol, ammonium persulfate and hydrochloric acid in three different reaction times, i.e. for 2, 6, and 12 hours at 26 oC. NP-PANI was afforded as a brown powder in 2.87%, 1.97% and 2.30% yield for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12. The characteristic on ultra violet-visible and infrared spectra exhibited NP-PANI was formed as an emeraldine salt oligomer. Moreover, their morphology was observed through scanning electron microscopy (SEM) and showed a different range of nanoparticle size, i.e. 50-62, 68-72 and 58-62 nm for NP-PANI-IM-2, NP-PANI-IM-6 and NP-PANI-IM-12, respectively. These products open the potency application in material science.

The Production of Green Diesel Rich Pentadecane (C15) from Catalytic Hydrodeoxygenation of Waste Cooking Oil using Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 Momodou Salieu Sowe; Arda Rista Lestari; Eka Novitasari; Masruri Masruri; Siti Mariyah Ulfa
Bulletin of Chemical Reaction Engineering & Catalysis 2022: BCREC Volume 17 Issue 1 Year 2022 (March 2022)
Publisher : Department of Chemical Engineering - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.17.1.12700.135-145

Hydrodeoxygenation (HDO) is applied in fuel processing technology to convert bio-oils to green diesel with metal-based catalysts. The major challenges to this process are feedstock, catalyst preparation, and the production of oxygen-free diesel fuel. In this study, we aimed to synthesize Ni catalysts supported on silica-zirconia and alumina-zirconia binary oxides and evaluated their catalytic activity for waste cooking oil (WCO) hydrodeoxygenation to green diesel. Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 were synthesized by wet-impregnation and hydrodeoxygenation of WCO was done using a modified batch reactor. The catalysts were characterized using X-ray diffraction (XRD), X-ray fluorescence (XRF), and scanning electron microscopy - energy dispersive X-ray spectroscopy (SEM-EDS), and N2 isotherm adsorption-desorption analysis. Gas chromatography - mass spectrometry (GC-MS) analysis showed the formation of hydrocarbon framework n-C15 generated from the use of Ni/Al2O3-ZrO2 with the selectivity of 68.97% after a 2 h reaction. Prolonged reaction into 4 h, decreased the selectivity to 58.69%. Ni/SiO2-ZrO2 catalyst at 2 h showed selectivity of 55.39% to n-C15. Conversely, it was observed that the reaction for 4 h increased selectivity to 65.13%. Overall, Ni/Al2O3-ZrO2 and Ni/SiO2-ZrO2 catalysts produced oxygen-free green diesel range (n-C14-C18) enriched with n-C15 hydrocarbon. Reaction time influenced the selectivity to n-C15 hydrocarbon. Both catalysts showed promising hydrodeoxygenation activity via the hydrodecarboxylation pathway. 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).

ANALISIS PENGARUH KONSENTRASI VANADAT (VO4³-) DALAM MEDIA KULTUR TERHADAP PERTUMBUHAN Dunaliella sp. Andi Kurniawan; Mohammad Elham Firdaus; Lutfi Ni’matus Salamah; Siti Mariyah Ulfa
Media Akuakultur Vol 14, No 1 (2019): (Juni, 2019)
Publisher : Pusat Riset Perikanan

Dunaliella sp. adalah mikroalga halotoleran yang banyak dijumpai pada lingkungan hipersalin. Mikrolaga ini mengandung berbagai substansi yang berharga seperti karetonoid, gliserol, lipid, protein dan vitamin sehingga banyak dibudidayakan. Salah satu faktor utama yang memengaruhi pertumbuhan Dunaliella sp. yang dibudidayakan adalah ketersediaan senyawa di dalam media kulturnya. Salah satu senyawa yang dapat menstimulus pertumbuhan mikroalga adalah vanadat (VO43-). Penelitian ini menganalisis pengaruh konsentrasi vanadat dalam media kultur terhadap pertumbuhan Dunaliella sp. Konsentrasi vanadat yang digunakan adalah 0,002 mg/L; 0,02 mg/L; 0,2 mg/L; dan 0 mg/L (kontrol). Hasil penelitian ini menunjukkan bahwa keberadaan vanadat dalam media kultur memengaruhi secara signifikan pertumbuhan Dunaliella sp. di mana pertumbuhan terbaik didapatkan pada pemberian vanadat dengan konsentrasi 0,002 mg/L. Berdasarkan hasil penelitian ini, vanadat dalam media kultur dapat digunakan sebagai penstimulus pertumbuhan Dunaliella sp.Dunaliella sp. is halotolerant microalgae commonly found in hypersaline waters. This microalgae contains various valuable substances such as carotenoids, glycerol, lipid, protein, and vitamins, and thus, widely cultivated. One of the primary factors that influence the growth of cultured Dunaliella sp. is the availability of certain nutrient/chemical compounds in its culture media. One of the compounds that can stimulate the growth of microalgae is vanadate (VO43-). This study analyzed the effects of vanadate concentration in the culture media on the growth of Dunaliella sp. The vanadate concentrations used were 0.002 mg/L, 0.02 mg/L, 0.2 mg/L, and 0 mg/L as the control concentration. The results of this study suggested that the existence of vanadate in the culture media significantly affected the growth of Dunaliella sp. in which the best growth of Dunaliella sp. was obtained by the treatment with 0.002 mg /L of vanadate. This study recommends that the vanadate with concentration of 0.002 mg/L should be used in the culture media of Dunaliella sp.

Co-Authors A.A. Ketut Agung Cahyawan W Adam Mahfud Ade Cintyia Sally Al zamzami, Ilham Misbakudin Alma Miranda Amaniyah, Amaniyah Amin, Abd Aziz Amini, Helda Wika Andi Kurniawan Andi Kurniawan Anggayasti, Wresti L. Anjani, Ryzki Martha Arda Rista Lestari Caterina Widya Astutik Chairulita Putri Kusumaningsih Dinia Rizqi Dwijayanti Dita Prihartini Dwi Susanti, Yogita Ayu Edi Priyo Utomo Edi Priyo Utomo Edi Priyo Utomo Efani, Anton Eka Novitasari Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Elvina Dhiaul Iftitah Esya, Firdausy Amalina Fadlilah, Lilik Nur Fatma, Aliya Galisong, Ridwan Danuarta Grahadi, Rahmat Gunawan, Firza Rajasa Hapsari, Febriyana Rizky Helda Wika Amini Hermanto, Feri Eko Hidayatul Mustafidah Hideki Okamoto Hideki Okamoto Iftitah, Elvina Dhiaul Indah Nur Pramesti Inra Sari Kamila, Fairuz Sarah Karimah Karimah Kyosuke Satake Kyosuke Satake Lisa Aulia, Lisa Listianingsih, Lia Lukman Hakim Lukman Hakim Lutfi Ni’matus Salamah Luthfia Ayu Dhea Maharani Pertiwi Koentjoro Mahfuzh Huda Masruri Masruri Masruri Masruri Masruri Moehammad, Khibar Syiar Moh. Farid Rahman Mohammad Elham Firdaus Mohammad Farid Rahman Mohammad Farid Rahman Momodou Salieu Sowe Momodou Salieu Sowe Nashi Widodo Nisa', Khibrun Nur Ikhtiarini Nuraini Uswatun Chasana Pangesti, Laras Pramudia, Zulkisam Pratama, Safreno Panggih Pratiwi, Rahmania Tulus Setya Puspitasari, Rizka Dwitya Rachmat Triandi Tjahjanto Rizka Fauzia Ohorella Rizqi Alima Fabri, Ahmad Rosyadah, Nuraini Safitri, Anna Salamah, Lutfi Ni’matus Suratmo, Suratmo SUTRISNO Sutrisno, Sutrisno Utomo, Edi Priyo Wardani, Eris Agustin Warsito Warsito Warsito Warsito Widia Edy Kuncoro Widodo Widodo Widyananda, Muhammad Hermawan Yanuar, Adi Tiya Yosua Yosua Yulistian, Dhoni Prielananta Yusnawan, Eriyanto Yusuf Hendrawan Zahara, Izaz Aqeiluz

Title

Found 46 Documents
Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title Search

Found 46 Documents Search

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Abstract

Title

Found 46 Documents
Search