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All Journal VALENSI CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI JURNAL PHARMASCIENCE Jurnal Riset Industri Hasil Hutan Jurnal Fisika FLUX JC-T (Journal Cis-Trans): Jurnal Kimia dan Terapannya Indonesian Journal of Chemistry Chemistry Indonesian Journal of Chemical Research Jurnal Pengabdian Kepada Masyarakat (Mediteg) Berkala Penelitian Hayati Jurnal Ilmiah Berkala Sains dan Terapan Kimia Bioscientiae, Jurnal ilmu ilmu Biologi Molekul: Jurnal Ilmiah Kimia Bulletin of Chemical Reaction Engineering & Catalysis Journal of Pharmascience
Maria Dewi Astuti
Universitas Lambung Mangkurat
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Economics, Econometrics & Finance Education Engineering Environmental Science Immunology & microbiology Industrial & Manufacturing Engineering Materials Science & Nanotechnology Medicine & Pharmacology Physics Social Sciences Veterinary

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Selective Hydrogenation of Stearic Acid to 1-Octadecanol Using Bimetallic Palladium-Tin Supported on Carbon Catalysts at Mild Reaction Conditions Rodiansono Rodiansono; Elisa Hayati; Atina Sabila Azzahra; Maria Dewi Astuti; Kamilia Mustikasari; Sadang Husain; Sutomo Sutomo
Bulletin of Chemical Reaction Engineering & Catalysis 2021: BCREC Volume 16 Issue 4 Year 2021 (December 2021)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.16.4.11895.888-903

Abstract

Bimetallic palladium-tin catalysts supported on microporous carbon (denoted as Pd-Sn(x)/C, loading amount of Pd = 5 wt% and x = Pd/Sn molar ratio; c.a. 3.0; 1.5; and 1.0) showed high selectivity in the hydrogenation of stearic acid towards 1-octadecanol (stearyl alcohol) under mild reaction conditions. Pd-Sn(x)/C catalysts were synthesized via the hydrothermal method at temperature of 150 °C for 24 h, and reduced with H2 at 400 °C for 3 h. Pd-Sn(1.5)/C catalyst exhibited the highest yield of stearyl alcohol (1-octadecanol) (up to 73.2%) at 100% conversion of stearic acid at temperature 240 °C, initial H2 pressure of 3.0 MPa, a reaction time of 13 h, and in 2-propanol/water solvent. The high selectivity of alcohols over Pd-Sn(1.5)/C catalyst can be attributed to the formation of bimetallic Pd-Sn alloy phases (e.g. Pd3Sn and Pd3Sn2) as obviously depicted by XRD analysis. The presence of co-promotor Sn and the formation of bimetallic may play a pivotal role in the high selectivity of 1-octadecanol. 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). 
One-pot Selective Conversion of Biomass-derived Furfural into Cyclopentanone/Cyclopentanol over TiO2 Supported Bimetallic Ni-M (M = Co, Fe) Catalysts Maria Dewi Astuti; Ditya Kristina; Rodiansono Rodiansono; Dwi Rasy Mujiyanti
Bulletin of Chemical Reaction Engineering & Catalysis 2020: BCREC Volume 15 Issue 1 Year 2020 (April 2020)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.15.1.6307.231-241

Abstract

One-pot selective conversion of biomass-derived furfural (FFald) into cyclopentanone (CPO) or cyclopentanol (CPL) using bimetallic nickel-based supported on TiO2 (denoted as Ni-M(3.0)/TiO2; M = Co and Fe; 3.0 is Ni/M molar ratio) have been investigated. Catalysts were synthesized via a hydrothermal method at 150 °C for 24 h, followed by H2 reduction at 450 °C for 1.5 h. X-ray Diffraction (XRD) analysis  showed that the formation of Ni-Co alloy phase at 2θ = 44.2° for Ni-Co(3.0)/TiO2 and Ni-Fe alloy at 2θ = 44.1° for Ni-Fe(3.0)/TiO2. The amount of acid sites was measured by using ammonia-temperature programmed desorption (NH3-TPD). Ni-Co(3.0)/TiO2 has three NH3 desorption peaks at 180 °C, 353 °C, and 569 °C with acid site amounts of 1.30 µmol.g-1, 1.0 µmol.g-1, and 2.0 µmol.g-1,        respectively. On the other hand, Ni-Fe(3.0)/TiO2 consisted of NH3 desorption peaks at 214 °C and 626 °C with acid site amounts of 3.3 µmol.g-1and 2.0 µmol.g-1, respectively. Both Ni-Co(3.0)/TiO2 and Ni-Fe(3.0)/TiO2 catalysts were found to be active for the selective hydrogenation of FFald to furfuryl alcohol (FFalc) at low temperature of 110 °C, H2 3.0 MPa, 3 h with FFalc selectivity of 81.1% and 82.9%, respectively. High yields of CPO (27.2%) and CPL (41.0%) were achieved upon Ni-Fe(3.0)/TiO2 when the reaction temperature was increased to 170 °C, 3.0 MPa of H2, and a reaction time of 6 h. The yield of CPO+CPL on the reused catalyst decreased slightly after the second reaction run, but the activity was maintained for at least three consecutive runs. Copyright © 2020 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). 
Selective Conversion of 2-Methylfuran to 1,4-Pentanediol Catalyzed by Bimetallic Ni-Sn Alloy Rodiansono Rodiansono; Astuti Maria Dewi; Sadang Husain; Agung Nugroho; Sutomo Sutomo
Bulletin of Chemical Reaction Engineering & Catalysis 2019: BCREC Volume 14 Issue 3 Year 2019 (December 2019)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.14.3.4347.529-541

Abstract

The selective conversion of 2-methylfuran (2-MeF) to 1,4-pentanediol (1,4-PeD) over bimetallic nickel-tin alloy catalysts in the ethanol/H2O solvent mixture was studied. By using bulk Ni-Sn(x); x = 3.0 and 1.5 catalysts, a maximum yield of 1,4-PeD (49%) was obtained at 94% conversion of 2-MeF. The dispersion of Ni-Sn(x) on the aluminium hydroxide (AlOH) or g-Al2O3 supports allowed to an outstanding yield of 1,4-PeD (up to 64%) at 433 K, 3.0 MPa of H2 within 12 h. Ni-Sn(3.0)/AlOH catalyst was found to be reusable and the treatment of the recovered Ni-Sn(3.0)/AlOH catalyst with H2 at 673 K for 1 h restored the catalyst’s original activity and selectivity. 
Adsorption of Congo Red onto Humic Acid Isolated from Peat Soil Gambut Regency, South Kalimantan Umaningrum, Dewi; Nurmasari, Radna; Santoso, Uripto Trisno; Astuti, Maria Dewi; Pradita, Hapsari Tyas
Molekul Vol 18 No 2 (2023)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jm.2023.18.2.8685

Abstract

Humic acid is one of the green materials for wastewater treatment including for removal dyes as an adsorbent. Humic acid was isolated from peat soil, Gambut Regency, South Kalimantan following International Humic Substances Society method, and used to adsorb Congo red. The adsorption process was carried out in a batch system and the effect of pH, contact time, and adsorption capacity of Congo red on humic acid were studied. The adsorbent characterization by using FTIR. The results showed that the adsorption of Congo red on humic acid occurred at the optimum pH of pH 6, the optimum contact time was 120 minutes. The adsorption capacity of Congo red onto humic acid of 33.33 mg/g and follows the Langmuir model with R2 = 0.9926. The characterization of humic acid functional groups before and after adsorption of Congo red showed that the signal at 1,712.79 cm-1 were shifted to 1,705.07 cm-1 and 1,273.02 cm-1 were shifted to 1,265.30 cm-1. These suggested that the mechanism interaction was the electrostatic interaction between -NH3+ functional group of Congo red group and -COO- functional group of humic acid. It means that humic acid isolated from peat soil could be used as an adsorbent for the removal Congo red.
Variation of Iodine Mass and Acetylation Time On Cellulose Acetate Synthesis From Rice Straw Umaningrum, Dewi; Astuti, Maria Dewi; Nurmasari, Radna; Hasanuddin, Hasanuddin; Mulyasuryani, Ani; Mardiana, Diah
Indonesian Journal of Chemical Research Vol 8 No 3 (2021): Edition for January 2021
Publisher : Jurusan Kimia, Fakultas Sains dan Teknologi, Universitas Pattimura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30598/ijcr.2021.8-dew

Abstract

Cellulose acetate is a membrane material that can be used in the sensor field. One source of cellulose acetate is from rice straw. This study aimed to study the effect of iodine mass and acetylation time on cellulose acetate synthesis from rice straw. The initial step is to isolate cellulose from rice straw, followed by cellulose acetate synthesis using iodine catalyst by varying the amount of iodine as much as 0.1-0.3 grams and acetylation time for 1 until 5 hours. The cellulose acetate was characterized using an infrared spectrophotometer, and its viscosity was determined. The result shows that the cellulose 33.63%. The maximum time of cellulose acetate acetylation is 2 hours with a mass of iodine 0.2 g. The yield of cellulose acetate was 14.98%, with an acetyl value of 19.11% and a degree of substitution of 0.89. The cellulose acetate produced has a low viscosity. The FTIR characterization of cellulose acetate shows O-H functional groups at 3333 cm-1, C-H functional groups at ​​2897 cm-1, carbonyl functional groups at 1722 cm-1 C-O functional groups at 1029 cm-1 that were identical in cellulose acetate compounds. The amount of iodine and the acetylation time affected the cellulose acetate product.
Isolasi dan Identifikasi Steroid dari Fraksi Etil Asetat Herba Lampasau (Diplazium esculentum Swartz) Revita Saputri; Maria Dewi Astuti; Evi Mintowati Kuntorini
Journal of Pharmascience Vol. 3 No. 2 (2016): Jurnal Pharmascience
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jps.v3i2.5745

Abstract

Lampasau (Diplazium esculentum Swartz) memiliki potensi sebagai tanaman obat tradisional salah satunya sebagai obat analgetika. Penelitian ini bertujuan untuk mengidentifikasi senyawa kimia yang diisolasi dari fraksi etil asetat ekstrak metanol herba lampasau. Ekstrak metanol diperoleh secara maserasi dan difraksinasi berturut-turut dengan petroleum eter dilanjutkan dengan etil asetat. Fraksi etil asetat difraksinasi dengan kromatografi vakum cair dengan fase diam silika gel dan fase gerak n-heksana : kloroform dengan perbandingan berturut-turut (1:1), (1:2), (1:5) dan (1:8) dihasilkan fraksi A, B, C, D, E dan F. Fraksi A difraksinasi dengan dengan kromatografi vakum cair dengan fase diam silika gel dan fase gerak dengan gradien n-heksana tunggal, n-heksana : kloroform (9:1) serta n-heksana : kloroform (8,5:1,5) dihasilkan fraksi A8. Fraksi A8 dimurnikan dengan kromatografi lapis tipis preparatif pada silika gel dan dihasilkan isolat A8.3. Isolat A8.3 berupa padatan tidak berwarna. Hasil uji kualitatif kimia terhadap isolat A8.3 menunjukkan positif terhadap steroid. Panjang gelombang maksimum pada spektra UV Isolat A8.3 adalah 223 nm. Spektra IR isolat A8.3 menunjukkan adanya gugus O-H, uluran gugus C-H, tekukkan gugus CH2 dan CH3, gugus C=C, gugus C-OH dan gugus C=O. Berdasarkan hasil uji kualitatif kimia, spektra UV dan IR maka diduga bahwa isolat A8.3 merupakan senyawa steroid yang memiliki ikatan rangkap C=C (ena), ikatan O-H dan ikatan C=O (karbonil). Kata Kunci : Diplazium esculentum Swartz, fraksi etil asetat, steroid
Uji Antioksidan Senyawa Terpenoid Dari Fraksi M-17 Ekstrak Metilena Klorida Kulit Batang Tumbuhan Kasturi (Mangifera casturi) Budi Prayitno; Kholifatu Rosyidah; Maria Dewi Astuti
Journal of Pharmascience Vol. 3 No. 1 (2016): Jurnal Pharmascience
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/jps.v3i1.5832

Abstract

 ABSTRAK  Penelitian tentang isolasi senyawa dari ekstrak metilen klorida telah dilakukan. Hasil analisis diduga senyawa tersebut adalah senyawa (23-E)-27-nor-3β-hidroksisikloart-23-en-25-on. Tujuan dari penelitian ini adalah untuk mengetahui aktivitas antioksidan terhadap radikal DPPH. Uji aktivitas antioksidan dilakukan dengan metode DPPH (1,1-difenil-2-pikril hidrazil). Vitamin C digunakan sebagai kontrol positif. Senyawa 1 memiliki nilai IC50 sebesar 6.751 ppm dan IC50 vitamin C sebesar 2,98 ppm, sehingga senyawa ini tidak aktif antioksidan.  Kata kunci: Mangifera  casturi., antioksidan, triterpenoid  ABSTRACT Research on the isolation of compounds from the fraction of M 17 of methylene chloride extract has been done. The suspected compound is (23-E)-27-nor-3β-hydroxycycloart-23-ene-25-one. The aims of this study were to determine the antioxidant activity against DPPH radical fraction isolates extracts of plants kasturi to DPPH. The antioxidant activity assay was conducted by DPPH (1,1-diphenyl-2-picryl hydrazyl) method, vitamin C using as a positive control. Compound 1 has an IC50 value of 6.751 ppm while the value of IC50 for vitamin C was 2,98 ppm, so the compound is not an active antioxidant compounds.  Key words: Mangifera casturi, Antioxidant, triterpenoid 
Co-Authors Abdul Ghofur Abdul Ghofur Abdullah A. Abdullah Abdullah Abdullah Abdullah Abdullah Adi Maulana Agung Nugroho Ani Mulyasuryani Anni Nurliani Atina Sabila Azzahra Azidi Irwan Budi Prayitno Budi Prayitno Dahlena Ariyani Devia Salastiansyah Elwaty Dewi Umaningrum Dewi Umaningrum Diah Mardiana Diah Mardiana Ditya Kristina Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Dwi Rasy Mujiyanti Edi Mikrianto Elisa Hayati Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Evi Mintowati Kuntorini Faisal F. Faisal Farah Eka Putri Wisuda Hasanuddin Hasanuddin Husain, Sadang Istiqomah Istiqomah Kamilia Mustikasari Kamilia Mustikasari Kamilia Mustikasari Karlini Karlini kholifatu rosyidah Kholifatu Rosyidah Kiki Amalia Wardhani Kiky C SEMBIRING Kiky C. Sembiring L. Hartanto Nugroho Lathifah Fauzi Lisda Karmila Mahrita Wulandari Mardhatillah Mardhatillah Mardi Santoso Maria Muftiana Maulisa Rahmah Muhamat Muhamat Muhammad Agus Muljanto Muhammad Iqbal Pratama Nadia Sasanti Nenci Ratna Dewanti Noer Komari Nor Latifah Norma Milina Pradita, Hapsari Tyas Radna Nurmasari Rahmidah Ulfah R. Rahmida Ulfah Risnu Aritofa Rodiansono Rodiansono Sadang Husain Sadang Husain Saputri, Revita Shofia Qalby Shogo Shimazu Siska Siska Siska Siska Siti Hasnah Susi Susi Sutomo Sutomo Sutomo Sutomo Sutomo Sutomo Syahrul Khairi Tantriati T. Tantriati Taslim Ersam Taslim Ersam Tuti Sriwinarti Uripto Trisno Santoso Uripto Trisno Santoso Widiyanto, Gregorius