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All Journal ALCHEMY Jurnal Penelitian Kimia Indonesian Journal of Chemistry
Venty Suryanti
Department Of Chemistry, Faculty Of Mathematics And Natural Sciences, Universitas Sebelas Maret, Jl. Ir. Sutami 36A, Surakarta 57126, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Energy Environmental Science Materials Science & Nanotechnology

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 1 
Biosynthesis of Biosurfactant by Pseudomonas aeruginosa Using Cassava Flour Industrial Wastewater as Media Venty Suryanti; Sri Hastuti; Desi Suci Handayani
ALCHEMY Jurnal Penelitian Kimia Vol 10, No 1 (2014): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.10.1.12.22-30

Abstract

Biosynthesis of biosurfactant by Pseudomonas aeruginosa have been prepared using cassava flour industrial wastewater (manipueira) as medium. The optimum condition of the biosurfactans biosynthesis was obtained using media containing nutrient broth and manipueira without centrifugation (NBM) with 4 days fermentation. UV-Vis and FT-IR spectra indicated that the biosurfactant was a rhamnolipid containing hydroxyl, ester, carbocylic and aliphatic carbon chain functional groups. Biosurfactant exhibited critical micelle concentration (CMC) value of 576  mg/L and surface tension value of 0.045  N/m. The biosurfactant was able to decrease the interface tension and form emulsion with benzene, toluene, gasoline and palm oil. This biosurfactant showed w/o emulsion system.
Methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate Based Colorimetric Sensor for Oxyanions Venty Suryanti; Fajar Rakhman Wibowo; Sekar Handayani
Indonesian Journal of Chemistry Vol 20, No 2 (2020)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2479.528 KB) | DOI: 10.22146/ijc.39559

Abstract

A colorimetric anion sensor of methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate bearing –OH and –NH groups as binding sites and nitrophenyl as a signaling unit, has been successfully accomplished. The compound functioned as a colorimetric chemosensor for H2PO4– and AcO–, in particular, the sensor showed significant naked-eye detectable color change from colorless to light yellow. In contrast, no color change was detected upon addition of other anions such as SO42–, NO3–, and CIO4–. The anion sensing ability of the sensor was further investigated by UV-Vis absorption spectroscopy in acetone. Characteristic UV-Vis spectra changes were revealed upon addition of H2PO4– and AcO–.
Synthesis of Cellulose Acetate from Screw Pine (Pandanus tectorius) Leaves for Enhancing Water Permeability and Fouling Resistance of PVDF Membrane Elyna Wahyu Trisnawati; Venty Suryanti; Edi Pramono; Indri Sri Cahyani; Diah Safriyani
Indonesian Journal of Chemistry Vol 23, No 5 (2023)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.85726

Abstract

Cellulose derivatives from natural resources continuously develop to find the best hydrophobic polymer-based membrane technology performance. This study was conducted to improve the hydrophilicity, performance, and anti-fouling of polyvinylidene fluoride (PVDF) membrane with cellulose acetate (CA) filler synthesized from screw pine (Pandanus tectorius) leaf cellulose. CA was synthesized by the Fischer esterification mechanism and the PVDF membrane was fabricated using the phase inversion method with 0.3% CA concentration. FTIR analysis of CA shows an absorption at 1700 cm−1 suggesting that the hydroxyl group of cellulose had been successfully substituted with an ester group (C=O), and CA has a high degree of substitution (DS) value of 3.50. Adding CA improved the hydrophilicity and anti-fouling properties of up to 86.45% of PVDF membranes. Furthermore, CA increased the value of water permeability 2–3 times than pristine PVDF membrane. The presence of CA enhanced the porosity of the PVDF membrane, which promoted the membrane's effectiveness for MB filtering. As a result, CA from screw pine leaf cellulose has promising features as a filler for PVDF membranes and potential dye filtration.
Cellulose Ethers from Banana (Musa balbisiana Colla) Blossom Cellulose: Synthesis and Multivariate Optimization Safira Zidna Salama; Maulidan Firdaus; Venty Suryanti
Indonesian Journal of Chemistry Vol 24, No 1 (2024)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.86769

Abstract

Cellulose ethers are biocompatible polymers which have attracted considerable attention for various applications due to their physical and mechanical properties. The present work aims to find the optimum condition for synthesizing cellulose ethers from banana blossom cellulose (BBC) such as methylcellulose (MC), carboxymethyl cellulose (CMC) and hydroxypropyl cellulose (HPC). The ultrasonication-assisted method as an energy source is used to shorten the synthesis time at room temperature and obtain high yields. The influences of various parameters (NaOH concentration, etherification agents, and sonication time) were analyzed using a multivariate statistical modeling response surface methodology (RSM). The materials were characterized by FTIR, SEM, and TGA. The cellulose ethers obtained have the potential as food additives with DS values of 2.0, 0.7, and 0.86, respectively. MC was synthesized optimally with a yield of 96.52% using a composition of cellulose (0.4 g), 50% (w/v) NaOH (10 mL) and dichloromethane (6 mL). CMC was synthesized optimally with a yield of 98.26% using a composition of cellulose (0.4 g), 30% (w/v) NaOH (2 mL) and monochloroacetic acid (1 g). HPC was synthesized optimally with a yield of 97.51% using a composition of cellulose (0.4 g), 10% (w/v) NaOH (2 mL) and propylene oxide (1.5 mL).
Identifikasi Senyawa Kimia dalam Buah Kundur (Benincasa hispida (Thunb) Cogn.) dengan Kromatografi Gas-Spektrometer Massa (KG-SM) Venty Suryanti; Soerya Dewi Marliyana; Musmualim Musmualim
ALCHEMY Jurnal Penelitian Kimia Vol 14, No 1 (2018): March
Publisher : UNIVERSITAS SEBELAS MARET (UNS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/alchemy.14.1.13496.84-94

Abstract

Telah dilakukan isolasi dan identifikasi senyawa kimia buah kundur (Benincasa hispida). Komponen non polar dipisahkan dengan metode ekstraksi soxhlet selama 24 jam menggunakan pelarut petroleum eter. Residu dari ekstraksi soxhlet selanjutnya dimaserasi selama 24 jam menggunakan pelarut etanol. Terhadap ekstrak etanol selanjutnya dilakukan pemisahan senyawa kimia dengan kromatografi kolom menggunakan pelarut heksana, campuran heksana dengan etanol dan etanol. Fraksi yang telah terisolasi diidentifikasi dengan Kromatografi Gas-Spektrometer Massa (KG-SM). Senyawa yang berhasil teridentifikasi adalah tridekananitril, pentadekananitril dan heptadekananitril.  Identification of Chemical Constituents of Kundur Fruit (Benincasa Hispida (Thunb) Cogn.) by Gas Chromatography-Mass Spectrometry (GC-MS). Isolation and identification of chemical compounds of the kundur fruit (Benincasa hispida) have been conducted. Non polar components were isolated by soxhlet extraction for 24 h using petroleum ether as solvent. The residu was extracted by maseration using ethanol for 24 h. To the ethanol extract was applied chromatography column for further isolation using hexane, mixtures of hexane-ethanol, and ethanol as eluents. The isolated compounds were then identified by Gas Chromatography-Mass Spectrometry (GC-MS). The identified compounds were tridecanenitrile, pentadecanenitrile and heptadecanenitrile
Co-Authors Desi Suci Handayani Diah Safriyani Edi Pramono Elyna Wahyu Trisnawati Fajar Rakhman Wibowo Indri Sri Cahyani Maulidan Firdaus Musmualim Musmualim Safira Zidna Salama Sekar Handayani Soerya Dewi Marliyana Sri Hastuti