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All Journal VALENSI CHEMISTRY PROGRESS JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis JURNAL PHARMASCIENCE Jurnal Riset Industri Hasil Hutan Pharmascience 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
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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INVESTIGASI XRD PADA INTERLOGAM Ni3Sn2 YANG DISINTESIS SECARA TERMOKIMIA: EFEK TEMPERATUR, WAKTU DAN pH HIDROTERMAL Rodiansono Rodiansono; Abdul Ghofur; Maria Dewi Astuti; Kiky C Sembiring
Jurnal Sains dan Terapan Kimia Vol 9, No 1 (2015)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (645.082 KB) | DOI: 10.20527/jstk.v9i1.2144

Abstract

Studi secara sistematik menggunakan difraksi sinar-X pada senyawa interlogam nikel-timah (Ni3Sn2) dibuat dengan metode termokimia yang sederhana dari bahan baku bukan organologam telah dilakukan. Larutan nikel klorida heksahidrat (3,6 mmol) dalam air dan larutan timah klorida dihidrat (2.4 mmol) dalam etanol dicampur dan dihomogenkan pada temperatur 323 K selama 18 jam. pH campuran divariasi dari 2-12 dengan cara menambahkan larutan NaOH, kemudian dilakukan hidrotermal pada temperatur 423-523 K dan waktu hidrotermal 6-72 jam dan terakhir reduksi dengan gas H2 pada 673 K selama 1,5 jam. Pengaruh kondisi pembuatan seperti temperatur hidrotermal, lama waktu hidrotermal, dan penyesuaian pH larutan bahan baku sebelum hidrotermal berpengaruh secara signifikan terhadap kristalinitas dan kemurnian interlogam Ni3Sn2 yang terbentuk. Kondisi terbaik pembuatan interlogam Ni3Sn2 dengan kristalinitas dan kemurnian yang tinggi adalah 423 K, 24 jam, dan pH 12. Kata kunci: metode termokimia, hidrotermal, penyesuain pH, interlogam Ni3Sn2 
IMOBILISASI 1,8-DIHIDROXYANTHRAQUINON PADA SILIKA GEL MELALUI PROSES SOL-GEL Maria Dewi Astuti; Radna Nurmasari; Dwi Rasy Mujiyanti
Jurnal Sains dan Terapan Kimia Vol 6, No 1 (2012)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (241.695 KB) | DOI: 10.20527/jstk.v6i1.2103

Abstract

Telah dilakukan penelitian tentang imobilisasi silika gel dengan 1,8 Dihidroxyanthraquinone melalui proses sol-gel dan karakterisasinya. Kajian yang dilakukan meliputi sintesis dan karakterisasi silika terimobilisasi 1,8 Dihidroxyanthraquinone. Metode yang digunakan ialah metode sol-gel. Karakterisasi silika gel dilakukan dengan spektrofotometer inframerah (FTIR) dan difraktometer sinar-X (XRD. Hasil penelitian menunjukkan bahwa silika terimobilisasi 1,8 Dihidroxyanthraquinone berhasil dibuat yang ditunjukkan oleh munculnya serapan inframerah dari gugus fungsional –OH, C=O, C-C dan C-H,. Data XRD menunjukkan bahwa struktur silika terimobilisasi 1,8 Dihidroxyanthraquinone semakin bersifat kristal hampir menyerupai senyawa organik sebagai agen pemodifikasi silika gel. Kata kunci : silika gel, imobilisasi, 1,8 Dihidroxyanthraquinone, sol-gel 
KONTROL SELEKTIFITAS KATALIS ALLOY DUA LOGAM Ni-Ag PADA HIDROGENASI FURFURAL MENJADI FURFURIL ALKOHOL DAN TETRAHIDROFURFURIL ALKOHOL Rodiansono Rodiansono; Maria Dewi Astuti; Uripto Trisno Santoso; Azidi Irwan; Dwi Rasy Mujiyanti; Risnu Aritofa; Karlini Karlini; Abdurahman Abdurahman; Adi Maulana
Jurnal Sains dan Terapan Kimia Vol 12, No 2 (2018)
Publisher : Program Studi Kimia, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (364.15 KB) | DOI: 10.20527/jstk.v12i2.4822

Abstract

Kontrol selektifitas katalis alloy dua logam Ni-Ag ruah dan terembankan telah diselidiki secara sistematik dengan cara mengevaluasi pengaruh variasi rasio molar Ni/Ag, temperatur hidrotermal, waktu hidrotermal, dan pemilihan padatan pengemban yang sesuai dalam reaksi hidrogenasi selektif furfural. Rasio molar divariasi dari 0,75; 1,5; 2,0; dan 3;0, variasi temperatur hidrotermal dari 373 K, 423 K, dan 473 K selama 24 jam, sedangkan waktu hidrotermal divariasi dari 2-8 jam pada temperatur hidrotermal 523 K. Empat jenis padatan pengemban yang berbeda yaitu titanium oksida (TiO2), karbon aktif (C), gamma-alumina (g-Al2O3), dan aluminium hidroksida (AlOH) telah digunakan untuk katalis alloy Ni-Ag(3.0). Katalis Ni-Ag dengan rasio molar Ni/Ag = 1,5 dan 3,0 memiliki aktifitas dan selektifitas yang paling baik dalam reaksi hidrogenasi furfural menjadi furfuril alkoho dan tetrahidrofurfuril alkohol. Kenaikan temperatur hidrotermal dalam proses sintesis katalis Ni-Ag dan perubahan waktu hidrotermal untuk temperatur 523 K tidak secara signifikan meningkatkan kinerja katalis Ni-Ag(1,5) untuk reaksi yang sama. Katalis Ni-Ag(3.0) yang termbankan pada TiO2 memiliki aktifitas dan selektifitas yang superior dibandingkan dengan ruah dan pengemban yang lain.
EKSTRAK DAUN JERUK PURUT (Citrus hystrix DC) SEBAGAI INSEKTISIDA LARVA NYAMUK Aedes albopictus Muhamat Muhamat; Nenci Ratna Dewanti; Maria Dewi Astuti
Jurnal Riset Industri Hasil Hutan Vol 4, No 1 (2012)
Publisher : Kementerian Perindustrian

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (92.329 KB) | DOI: 10.24111/jrihh.v4i1.1197

Abstract

Kaffir lime is one of the plants that produce secondary metabolites. This plant can be used as intercropping plant in the Agroforestry project. Part lime leaves have been used by communities as a refresher, stimulant and insecticide. This study aims to determine the yield of kaffir lime leaves extract and its toxicity against larvae of Aedes albopictus. The extraction method used in this study was maceration with methanol solvent. Yield of extraction Kaffir lime leaves was 8.16%. Toxicity test of Kaffir lime leaves extract against larvae of Aedes albopictus with 24 hours treatment were 2430 ppm for LC50 and 3760 ppm for LC90. This result is classified to the category of low.Keywords : kaffir lime leave, secondary metabolite, intercrooping, ectract, toxicity.
The Coated-Wire Ion-Selective Electrode (CWISE) of Tartrazine Using Chitosan as an Ionophore Dewi Umaningrum; Radna Nurmasari; Siti Hasnah; Maria Dewi Astuti; Kiki Amalia Wardhani; Shofia Qalby
Jurnal Kimia Sains dan Aplikasi Vol 24, No 6 (2021): Volume 24 Issue 6 Year 2021
Publisher : Chemistry Department, Faculty of Sciences and Mathematics, Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2762.264 KB) | DOI: 10.14710/jksa.24.6.206-212

Abstract

Research on the Ion-Selective Electrode (ISE) of coated wire-type tartrazine using chitosan as an ionophore has been developed. The variables used in the manufacture of ISE are membrane composition and immersion time. Meanwhile, the basic characteristics of ISE measured are Nernst value, measurement concentration range, detection limit, and measurement response time. The results showed that ISE tartrazine coated wire type had an optimum membrane composition in a mixture of chitosan: PVC: DOP of 3: 34: 63 (% w/w) and a membrane immersion time 20 minutes. The basic characteristics of ISE produce a Nernst value of 20.976 mV/decade. The measurement concentration range is 1×10-7-1×10-2 M with a detection limit of 2.749×10-7 M or 0.1469 ppm. The response time ranges from 10-60 seconds, with an average of 40 seconds.
STRUKTUR ANATOMI DAN KERAPATAN SEL SEKRESI SERTA AKTIVITAS ANTIOKSIDAN EKSTRAK ETANOL DARI RIMPANG TEMULAWAK (Curcuma xanthorrhiza Roxb) ASAL KECAMATAN PENGARON KABUPATEN BANJAR KALIMANTAN SELATAN Evi Mintowati Kuntorini; Maria Dewi Astuti; Norma Milina
Bioscientiae Vol 8, No 1 (2011): Bioscientiae Volume 8 No 1
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (391.424 KB) | DOI: 10.20527/b.v8i1.188

Abstract

This study aimed to observe the anatomical structure and density of secretory cells as well as knowing activity of ethanol extract aktioksidan associated with cell density of the rhizome of Curcuma xanthorrhiza secretion originating from Sub Pengaron Banjar regency, South Kalimantan. Making preparations rhizome anatomy carried out by using Free Hand Section, the analysis of antioxidant activity using DPPH (1,1-diphenyl-2-pikrilhidrazil). Observations consisting of rhizome anatomical structure of cells of the epidermis, the cortex, endodermis and the central cylinder. In epidermal cells contained little hair cover, the cortex and central cylinder composed of parenchymal cells, cell secretion and the carrier files. The antioxidant activity of ethanol extract obtained from the calculation rhizome Consentrasion inhibition (IC50) ranged from 17.70 to 55.22 ppm. IC50 value of 17.70 ppm rhizome ethanol extract has antioxidant activity 5 times weaker compared to the control of vitamin C (IC50 3.71 ppm) and 3 times weaker than BHT (IC 50 5.57 ppm). At 55.22 ppm IC50 extract has antioxidant activity 15 times weaker compared to the control of vitamin C and 10 times weaker than the BHT. Secretory cell density relationship with the antioxidant activity in test with linear regression analysis showed that there was no relationship between the density of secretory cells per unit area with antioxidant activity in the rhizome of Curcuma xanthorrhiza.
Chemical composition comparison of n-hexane extract and essential oil kemenyan toba (Styrax sumatrana) sap from Tobasa North Sumatera by GC-MS and in silico study its compound as antiinflammatory Kamilia Mustikasari; Mardi Santoso; Nadia Sasanti; Maria Dewi Astuti; Taslim Ersam; Noer Komari
Jurnal Riset Industri Hasil Hutan Vol 14, No 2 (2022)
Publisher : Kementerian Perindustrian

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24111/jrihh.v14i2.7220

Abstract

The sap of kemenyan toba (Styrax sumatrana) is often used as a binder for perfumes, raw materials for cosmetics and medicines, so it is widely traded. However, not many studies have reported about its chemical composition. The process of extracting chemical compounds from kemenyan toba (S. sumatrana) sap quality one was carried out by maceration method using n-hexane and water distillation. The result of maceration was 25.3% of the n-Hexane extract, while the distillation yielded 0.13% (w/w) of a pale-yellow oil. The results of the GC-MS analysis showed that only benzoic acid was present in the extracts and essential oils. n-Hexane extract consists of styrene compounds, cinnamic acid, benzyl benzoate, 1,4-diphenyl-1.4-butanedione, benzyl cinnamates, methyl styrene, and cinnamyl cinnamate. In comparison, essential oil consists of 3-methylpentan-2-one, methyl palmitate, methyl stearate, methyl trans-9.10-epoxystearate, dioctyl hexanedioic, methyl oleic, and methyl-13.16-Octadecanoic. The in-silico test results of several compounds as antiinflammatory showed that the compounds cinnamyl cinnamate had potential as an anti-inflammatory.
Selective Hydrogenation of Biomass-derived Furfural over Supported Ni3Sn2 Alloy: Role of Supports Rodiansono Rodiansono; Maria Dewi Astuti; Syahrul Khairi; Shogo Shimazu
Bulletin of Chemical Reaction Engineering & Catalysis 2016: BCREC Volume 11 Issue 1 Year 2016 (April 2016)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.11.1.393.1-9

Abstract

A highly active and selective hydrogenation of biomass-derived furfural into furfuryl alcohol was achieved using supported single phase Ni3Sn2 alloy catalysts. Various supports such as active carbon (AC), g-Al2O3, Al(OH)3, ZnO, TiO2, ZrO2, MgO, Li-TN, and SiO2 have been employed in order to understand the role of the support on the formation of Ni3Sn2 alloy phase and its catalytic performance. Supported Ni3Sn2 alloy catalysts were synthesised via a simple hydrothermal treatment of the mixture of aqueous solution of nickel chloride hexahydrate and ethanol solution of tin(II) chloride dihydrate in presence of ethylene glycol at 423 K for 24 h followed by H2 treatment at 673 K for 1.5 h, then characterised by using ICP-AES, XRD, H2- and N2-adsorption. XRD profiles of samples showed that the Ni3Sn2 alloy phases are readily formed during hydrothermal processes and become clearly observed at 2θ = 43-44o after H2 treatment. The presence of Ni3Sn2 alloy species that dispersed on the supports is believed to play a key role in highly active and selective hydrogenation of biomass-derived furfural towards furfuryl alcohol. Ni3Sn2 on TiO2 and ZnO supports exhibited much lower reaction temperature to achieved >99% yield of furfuryl alcohol product compared with other supports. The effects of loading amount of Ni-Sn, reaction conditions (temperature and time profile) on the activity and selectivity towards the desired product are systematically discussed. 
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). 
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 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