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All Journal HAYATI Journal of Biosciences VALENSI CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Jurnal Sains dan Teknologi Jurnal Pendidikan Biologi Indonesia Jurnal Kimia Riset Menara Ilmu Jurnal Media Sains Journal of Health Sciences and Medicine Journal of Multidisciplinary Applied Natural Science

I. A. R. Astiti Asih

Program Studi Kimia Fakultas Matematika Dan Ilmu Pengetahuan Alam Universitas Udayana

Author-ID : 2421099

Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Materials Science & Nanotechnology Mathematics Medicine & Pharmacology Physics

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POTENSI MINYAK ATSIRI RIMPANG JERINGAU (Acorus calamus Linn) SEBAGAI PENGHAMBAT PERTUMBUHAN Fusarium solani, JAMUR PATOGEN PENYEBAB BUSUK BATANG PADA BUAH NAGA Wiwik Susanah Rita; Ida Ayu Raka Astiti Asih; Ni Made Yuliari
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 4 No 2 (2016)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Isolasi dan uji aktivitas minyak atsiri rimpang jeringau (Acorus calamus Linn) sebagai penghambat pertumbuhan jamur patogen Fusarium solani telah dilakukan. Penelitian ini bertujuan untuk mengetahui aktivitas antijamur terhadap Fusarium solani dan kandungan utama dari minyak atsiri rimpang jeringau. Ekstraksi minyak atsiri dilakukan dengan metode destilasi uap, sedangkan uji aktivitas antijamur dilakukan dengan metode sumur difusi, dan identifikasi dilakukan dengan gas kromatografi – spektrometri massa (GC-MS). Ekstraksi 10 kg rimpang jeringau menghasilkan 13,39 gram minyak dengan hasil rendemen sebesar 0,1339%. Minyak atsiri memiliki warna kuning dan bau yang sangat tajam. Hasil uji aktivitas antijamur Fusarium solani terhadap minyak atsiri konsentrasi 10% menunjukkan aktivitas kuat dengan daya hambat sebesar 10,00 mm. Nilai Minimum Inhibitory Consentration (MIC) sebesar 2,0 % (v/v) dengan diameter hambat sebesar 5,50 mm. Hasil uji daya hambat pertumbuhan koloni, spora, dan biomassa jamur meningkat dengan kenaikan konsentrasi minyak atsiri. Analisis dengan gas kromatografi – spektrometri massa (GC-MS) menunjukkan bahwa komponen terbesar minyak atsiri jeringau adalah senyawa asaron. ABSTRACT: Isolation and Activity test of Jeringau rhizome’s essential oil (Acorus Calamus Linn) to inhibit the growth of fungal pathogen, Fusarium solani has been performed. The aim of this research are to determine the antifungal activity and essential oil’s components of Jeringau rhizome. The extraction process was performed by steam distillation method, antifungal activity was analysed by well diffusion method, and the Gas Chromatography-Mass Spectrometry (GC-MS) was used to determine the essential oil components. The yield of essential oil was 0.1339% and has yellow colour with pungent smell. At concentration of 10.0%, the essential oil extract gave the strong activity to inhibit the Fusarium solani, with 10 mm in diameter. Minimum Inhibitory Concentration (MIC) was 2.0% that gave inhibition’s zone of 5.50 mm. Inhibition of colony, spore, and biomass of fungi increase with concentration. Analysis using GC-MS indicated the main essential compound is asarone.

AKTIVITAS ANTIOKSIDAN FRAKSI n-BUTANOL EKSTRAK KULIT TERONG BELANDA (Solanum betaceum Cav.) SECARA IN VITRO DAN IDENTIFIKASI SENYAWA GOLONGAN FLAVONOIDNYA Ni Putu Widayanti; Ni Made Puspawati; I Nyoman Suarsana; I.A. Raka Astiti Asih; Wiwik Susanah Rita
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 4 No 1 (2016)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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ABSTRAK: Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan secara in vitro dan mengidentifikasi golongan senyawa flavonoid yang terkandung dalam fraksi n-butanol ekstrak kulit terong belanda. Uji aktivitas antioksidan dilakukan dengan metode DPPH. Pemisahan dan pemurnian fraksi aktif n-butanol dilakukan dengan kromatografi kolom menggunakan silika gel yang dielusi dengan n-butanol-etil asetat-asam asetat 10% (2:7:1) dan diidentifikasi dengan spektrofotometer UV-Vis dan FTIR. Fraksi n-butanol memiliki aktivitas antioksidan yang kuat dengan nilai IC50 sebesar 69,89 mg/L. Empat senyawa flavonoid (isolat A, C, H, dan J) berhasil diisolasi dan diidentifikasi sebagai golongan flavon, flavonol dan isoflavon. Senyawa tersebut dipercaya memiliki aktivitas antioksidan. ABSTRACT: The present study was conducted to determine in vitro antioxidant activity and ctivity and to identify flavonoid class of compounds present in n-butanol active fraction of Terong Belanda (Solanum betaceum cav.) peel extract. Antioxidant activity test was performed by DPPH (1,1-diphenyl-2-pycrylhidrazyl) method. Separation and purification of n-butanol active fraction were done using silica gel column chromatography eluted with n-butanol-ethyl acetate-acetic acid 10% (2:7:1) and identified by UV-Vis and FTIR spectrophotometer. n-Butanol fraction had strong antioxidant activity with IC50 value by 69.89 mg/L. Four flavonoids (A, C, H, and J isolates) were isolated and identified as flavone, flavonol and isoflavone. This compounds are believed to be responsible for their antioxidant activity.

ISOLASI DAN UJI AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOID DARI EKSTRAK DAUN JAMBU BIJI PUTIH (Psidium guajava Linn) Egi Azikin Maulana; I. A. R. Astiti Asih; Made Arsa
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 1 Januari 2016
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Antioxidant is molecules that can inhibit the activity of free radical. White guava (Psidium guajava Linn) is one of many plants that have potential as antioxidant. This research was aimed to identify the flavonoid compounds and to determine IC50 values in the white guava leaf extract. Extraction was done by maceration method. The separation and purification was done by TLC and coloumn chromatography method. Flavonoid compound was identified using FTIR and UV-Vis spectrofotometry and antioxidant activity was tested with DPPH method. A 1000 grams of white guava leaf powder was extracted by n-hexane produced 103,40 grams of concentrated n-hexane extract and extraction procces by ethanol 70 % produced 128,49 grams of concetrated etanol extract. Eighty grams of ethanol extract partition produced 1.01 grams of n-hexane extract, 1.95 grams of chloroform extract, and 3.77 grams of n-butanol extract. The results of phytochemical test indicated that n-butanol extract positively contained flavonoids. The results of antioxidant activity towards DPPH from n-butanol extract showed IC50 of 37,14 ppm. The separation and purification n-butanol extract with n-hexane : ethyl acetate : n-butanol (8:2:1) as the eluent resulted 5 fractions (A, B, C, D, E), with C fraction positively contained flavonoids. FTIR analysis showed C isolates contained functional groups of CH aliphatic, CH aromatic, C = C aromatic, C = O, OH, and C - O. C fraction was analyzed with UV-Vis showing 2 peaks at ? 347.30 nm (band I) and ? 278.50 nm (band II) suggesting the presence of flavones group with possibility of OH groups attached to C-3, C-2’ atoms, ortho-dihydroxy groups attached to C-5', C- 6; C-4', C-5', and O-glycoside group at C-7 atom.

OPTIMASI ADSORPSI Cr(VI) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI DIFENILKARBAZIDA (Si-DPZida) Henny Puspa Dewi Giri; I Wayan Sudiarta; Ida Ayu Raka Astiti Asih
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 2 Juli 2014
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Adsorption of chromium (VI) on silica gel modified by diphenilcarbazide (Si-DPZida) have been studied. Parameters analyzed were surface acidity by acid-base titration method, specific surface area by absorption of methylene blue method, optimum conditions of adsorption (pH, contact time), and isotherm adsorption. The results showed that Si-DPZida adsorbent has surface acidity (Kal) of 1,5996 mmol/g with the number of active sites of 9,6328 x 1020 atom/g with specific surface area of 4.4538 m2/g. The optimum adsorption process of chromium (VI) by both Si-DPZida occurred at pH 5 and 15 minutes of contact time. The isotherm adsorptions on both adsorbents tend to follow Freundlich adsorption pattern.

STUDI KOPOLIMERISASI GRAFTING ASAM AKRILAT (AA) PADA POLIETILEN (PE) DENGAN INISIATOR H2O2/Fe2+: SEBAGAI PENUKAR KATION I Gede D. Yudha Partama; Ida Ayu Raka Astiti Asih; James Sibarani
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 2 Juli 2011
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Cation exchanger have been prepared by graft copolymerization of acrylic acid (AA) onto a low density polyethylene (LDPE) with “grafting-on” method using Fenton reagent (H2O2/Fe2+) as initiator under nitrogen atmosphere at 280C. The percentage of grafting was determined by the gravimetric method. The percentage of grafting was influenced by monomer concentration, initiator concentration (H2O2), and the duration of grafting. The optimum conditions were obtained at 15% (v/v), 0.2 mL, and 8 hours for the monomer concentration, the volume of initiator H2O2 30%, and the duration of grafting respectively.Analysis of the PE-g-AA was conducted using Fourier Transform Infrared (FTIR) spectroscopy to confirm graft copolymerization which revealed the existence of new absorption peak at 1712,79 cm-1 and 2661,77 cm-1 assigned to C=O and O-H respectively. Characteristic of PE-g-AA film was tested by water uptake capability and cation exchange capacity toward Cu2+. The two characteristics were increased by percent grafting.

UJI TOKSISITAS EKSTRAK DAUN TENGGULUN (Protium javanicum Burm. F) DENGAN METODE BRINE SHRIMP LETHALITY TEST (BSLT) N. M. Puspawati; I K. D. Yasa; I. A. R. A. Asih
Jurnal Kimia (Journal of Chemistry) Vol. 15, No.2, Juli 2021
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2021.v15.i02.p15

Tumbuhan tenggulun (Protium javanicum Burm F.) secara tradisional telah digunakan untuk mengatasi berbagai macam penyakit seperti batuk, perut nyeri, diare, dan radang. Penelitian ini dilakukan dengan tujuan untuk menentukan toksisitas ekstrak n-heksana, etil asetat, n-butanol daun tenggulun terhadap larva Artemia salina L dan mengidentifikasi senyawa aktifnya. Toksisitas ekstrak ditentukan dengan metode Brine Shrimp Lethality Test (BSLT) dan identifikasi senyawa aktifnya dengan LCMS/MS (Liquid Chromatography tandem Mass Spectrometry/Mass Spectrometry). Maserasi 1000 g daun tenggulun dengan metanol menghasilkan 116,9936 g ekstrak kasar metanol. Partisi ekstrak kasar metanol memakai pelarut n-heksana, etil asetat, dan n-butanol masing-masing menghasilkan ekstrak kental n-heksana, etil asetat, dan n-butanol. Hasil uji toksisitas terhadap ektrak n-heksana, etil asetat, dan n-butanol diperoleh nilai LC50 sebesar 218,78; 134,90; dan 223,87 ppm. Ekstrak etil asetat menunjukkan toksisitas yang relatif lebih tinggi dibandingkan ekstrak lainnya. Pemisahan senyawa aktif pada ektrak etil asetat dilakukan dengan metode kromatografi vakum cair (KVC) dengan fase diam silika gel dan fase gerak (n-heksana 100% sampai metanol 100 %) menghasilkan 5 fraksi (FA, FB, FC, FD, dan FE). Toksisitas tertinggi pada konsentrasi uji 100 ppm ditunjukkan oleh FA dengan persentase kematian larva 83,33%. Hasil analisis spectra LC-MS/MS dari fraksi aktif ekstrak etil asetat daun tenggulun FA menunjukkan adanya kandungan senyawa aktif yang diduga sebagai benzodioxepin-7-yl-7H-furo[3,2-g]chromen-7-one dan 10-(1,3-benzodioxol-5-yl)-9H-[2]benzofuro[6,5-g][1,3]benzodioxol-7-one. Kata kunci: Tenggulun (Protium javaniccum Burm F), toksisitas, Brine Shrimp Lethality Test, LC-MS/MS

DETEKSI ETANOL SETELAH KONSUMSI ARAK DALAM URIN DENGAN GAS CHROMATOGRAPHY N. M. Suaniti; I. A. R. Astiti Asih; N. P. Widya Astuti
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 2 Juli 2012
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Ethanol is an alcohol which is in particular concentration allowed existing in beverages. One of alcoholic beverages that is popular in Bali is arak. This kind of beverage may contain ethanol in various concentrations depending on the distillation process carried out. The aim of this study was to detect the alcohol contents in urine collected from some volunteer who have consumed arak for two weeks with the technique of Gas Chromatography Flame Ionization Detector (GC-FID). The standard solutions employed were methanol, ethanol and acetic acid, while buthanol was used as the internal standard solution. The urine samples were collected in various sampling times after two weeks arak consumption. The ethanol contents obtained after 4, 8, 12, 16, 28, and 20 hours from the last consumption were (8.86 – 8.98) x 10-2 , (8.06 – 8.46) x 10-2, (8,81 – 8.93) x 10-2, (7.47 – 7.73) x 10-2, (8.76 – 8.89) x 10-2, and (8.15 – 8.27) x 10-2% (b/v), respectively.

AKTIVITAS ANTIBAKTERI EKSTRAK KULIT PISANG KEPOK KUNING (Musa paradisiaca L.) TERHADAP BAKTERI Staphylococcus aureus DAN Escherichia coli SERTA PENENTUAN TOTAL FLAVONOID DAN FENOL DALAM FRAKSI AKTIF N. K. D. M.S. Wahyuni; W. S. Rita; I. A. R. A. Asih
Jurnal Kimia (Journal of Chemistry) Vol.13 No.1 Januari 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Peel of yellow kepok banana (Musa paradisiaca L). has not been used optimally, while the peel can be used as an infection medicine The aim of this study was to reveal the activity of kepok yellow banana peel extract against Staphylococcus aureus and Escherichia coli and to determine the total content of flavonoids and phenols in active extract.. Extraction peel of yellow kepok banana was done by maceration and partition method, anti bacterial activity was assayed by wells diffusion method, determination total flavonoid and phenolic contents was done by UV-Vis Spectrophotometer. Maceration of 1 kg peel of yellow banana produced 80.9173 g of crude ethanol extract. The partition of 20 g crude ethanol extract produced 1,3758 g of n-hexane extract, 3,5818 g of ethyl acetate extract, and 1,0762 g of n-butanol extract. Anti bacterial test result showed that the 10% n-butanol extract was active towards S.aureus and E.coli with strong activity compared with ethanol, ethyl acetate, and n-hexane extract. MIC value was 0.5% for S.aureus and 0,2% for E.coli bacteria. The contain total flavonoid and phenol in n-butanol extract respectively were 0.06% and 0.15%.

SENYAWA GOLONGAN FLAVONOID PADA EKSTRAK n-BUTANOL KULIT BATANG BUNGUR (Lagerstroemia speciosa Pers.) I. A. R. Astiti Asih; I M. Adi Setiawan
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 2 Juli 2008
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

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Isolation and identification of flavonoid compounds from skin of Bungur (Lagerstroemia speciosa Pers.)have been conducted. Isolation was carried out by maceration and partition, to obtain n-hexane, ethyl-acetate, and nbutanolextracts. Concentrated n-butanol extract was purified using thin layer chromatography and columnchromatography.Isolate F2.6 from n-butanol extract contains flavonoid compounds. Uilta Violete - Visible spectra showedthat the flavonoid compounds were flavanon or dihidroflavanol, with characteristic wavelengths from 275 to 295 nmfor Band II and 350 to 400 nm for Band I. Shifting reagents added indicated no hydroxyl group at C-3 and C-5,hydroxyl group at C-7, no ortho-dihydroxyl group at ring A,B, or C, and O-glycoside at C-7. Infrared spectraindicated characteristic functional groups of O-H bonded, CH alifatic, C=O, C=C aromatic, C-O, and CH aromatic.The flavonoid compounds indicated was flavanon group, which has functional groups of O-H bonded, CHalifatic, C=O, C=C aromatic, C-O, and CH aromatic, and hydroxyl group at C-7. It does not have ortho-dihydroxylgroup at ring A,B, or C, but has O-glycoside at C-7.

PEMBUATAN VIRGIN COCONUT OIL DENGAN PENAMBAHAN ENZIM PAPAIN DARI EKSRAK DAUN PEPAYA (Carica papaya) I W. Suirta; I. A. R. Astitiasih
Jurnal Kimia (Journal of Chemistry) Vol. 14, No. 2 Juli 2020
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JCHEM.2020.v14.i02.p14

Virgin coconut oil has been made by using papaya leaf extract as a source of the papain enzyme. Papaya leaf extraction with maceration used ethanol 95% as solvent. The crude ethanol extract was purified by means of gradient column chromatography using hexane, diethyl ether and ethanol as solvents. The results showed that using papaya leaf extract could significantly increase the quantity of VCO. Coconut milk cream without treatment (negative control) obtained 3.0042 ± 0.046g of VCO, while treatment with papaya leaf extract gained 6,039 ± 0.049 - 7,952 ± 0.031g of VCO, an increase of about 97.5% - 161%. Based on the medium chain saturated fatty acids (MCFA) and long chain saturated fatty acids (LCFA) in VCO, it indicated that the quality of VCO obtained was not good. VCO in diethyl ether fraction and crude extract etanol produced yellow VCO, indicating chlorophyll was still there. Etanol fraction of VCO provided the best quality with the most of lauric acid content and clear color. The VCO components identified using GCMS analysis obtained several fatty acids such as capric acid, lauric acid, myristic acid, palmitic acid, oleic acid, stearic acid, and stearic epoxy. Keywords: virgin coconut oil, papain enzyme, papaya leaf extract Telah dilakukan pembuatan virgin coconut oil dengan ekstrak daun pepaya sebagai sumber enzim papain. Proses ekstraksi daun pepaya dengan cara maserasi menggunakan pelarut etanol 95%. Ekstrak kasar etanol hasil maserasi dimurnikan dengan cara kromatografi kolom elusi gradient menggunakan pelarut heksana, dietil eter, dan etanol. Hasil penelitian menunjukkan bahwa ekstrak daun pepaya secara signifikan dapat meningkatkan kuantitas VCO. Krim santan tanpa perlakuan (kontrol negatip) didapatkan berat VCO 3.0042±0,046g, sedangkan dengan ekstrak daun pepaya diperoleh berat VCO 6.039±0,049g – 7.952±0,031g, terjadi kenaikan sekitar 97,5% - 161%. Berdasarkan kandungan asam lemak rantai medium dan asam lemak rantai panjang pada VCO, menunjukkan bahwa kualitas VCO yang diperoleh masih kurang baik. Krim santan dengan daun pepaya fraksi dietil eter dan ekstrak kasar etanol menghasilkan VCO berwarna kuning yang mengindikasikan masih terdapat klorofil. VCO fraksi etanol yang memberikan kualitas paling baik dengan kandungan asam laurat paling banyak dan berwarna bening. Komponen VCO yang teridentifikasi dari analisis GCMS diperoleh beberapa asam lemak seperti: asam kaprat, asam laurat, asam miristat, asam palmitat, asam oleat, asam stearat, dan epoksi stearat. Kata kunci: virgin coconut oil, enzim papain, ekstrak daun pepaya

Co-Authors A. A. N. G. W. Pramantha Adnyana , I Made Dwi Mertha Ana Malia Anak Agung Istri Agung Mayun Laksmiwati Aryanu Fahmi Arwangga Desmon Tutu Bili E. Sahara Egi Azikin Maulana Eti Meirina Brahmana Eti Meirina Brahmana Henny Puspa Dewi Giri I Gede D. Yudha Partama I Gusti Ayu Kunti Sri Panca Dewi I Gusti Bagus Teguh Ananta I K. D. Yasa I M. Adi Setiawan I M. O. A. Parwata I Made Dira Swantara I Made Wisnu Adhi Putra I Nyoman Mika Adi Santosa I Nyoman Suarsana I W. A. Kartika I W. G. Gunawan I Wayan Sudiarta I Wayan Suirta I. A. Gede Widihati Ida Bagus Swardana Irdhawati Irdhawati James Sibarani Jeane, Magda Juniari, Tjokorda Istri Trisna K. Swandiyasa Ketut Ratnayani Liana Sari Made Arsa Mahardika Aprilia Iflahah Manuntun Manurung Mariance Thomas Miftakul Sururi N. K. D. M.S. Wahyuni N. M. Desi Ariani N. P. Widya Astuti N. W. Bogoriani N.K. Sinarsih Ni Kadek Dyan Mustika Sri Wahyuni Ni Luh Gede Sudaryati Ni Luh Indra Dewi Senisk Ni Luh Yuli Damayanti Ni Made Puspawati Ni Made Suaniti Ni Made Yuliari Ni Putu Widayanti Ni Wayan Oktarini A.C.Dewi Putu Lakustini Cahyaningrum Putu Suarya Putut Dewantha Jenar S. R. Santi Sri Rahayu Santi Sri Wahjuni W. S. Rita W. S. Rita W.S. Rita WAHYU DWIDJANI S Wiwik Susana Rita WIWIK SUSANAH RITA Yudha Taufantri

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