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All Journal CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Jurnal Kimia (Journal of Chemistry) Buletin Udayana Mengabdi Bumi Lestari Jurnal Media Sains
Putu Suarya
Program Studi Kimia FMIPA Universitas Udayana, Bukit Jimbaran, Bali-Indonesia
Agriculture, Biological Sciences & Forestry Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Earth & Planetary Sciences Education Electrical & Electronics Engineering Energy Environmental Science Immunology & microbiology Medicine & Pharmacology

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OPTIMASI JENIS PELARUT DALAM EKSTRAKSI ZAT WARNA ALAM DARI BATANG PISANG KEPOK (Musa paradiasiaca L. cv kepok) DAN BATANG PISANG SUSU (Musa paradiasiaca L. cv susu) I Wayan Suarsa; Putu Suarya; Ika Kurniawati
Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 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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Abstract

Research on optimation of the type of solvent in natural dye found in extracs of kepok banana’s stem (Musa paradiasiaca L. cv kepok) and susu banana’s stem (Musa paradiasiaca L. cv susu) has been carried out. The obtained natural dye was determined for its rendement, natural dye groups, and the maximum absorption at 400 – 700 nm. Maseration of 100 g of dry powder of kepok banana and susu banana stems were conducted using four kinds of solvent namely, ethanol, acetone, and n-hexane. From kepok banana’s stem thick extracts 9.21 grams water; 3.19 grams ethanol; 1.23 grams acetone; and 0.21 grams n-hexane were obtained, whereas from susu banana’s stem were 12.13 grams water, 3.31 grams ethanol, 1.42 grams acetone, and 0.17 grams n-hexane thick extracts.Extracts obtained were concentrated, and then the rendements were determined. The redements from the kepok banana’s stem, were : water (36.84%), ethanol (12.67 %), acetone (4.92 %), and n-hexane (0.84%), whereas from susu banana’s stem, were : water (28.52%), ethanol (13.24%), acetone (5.68 %). and n-hexane (0.68%),The result of the fitochemical test showed that the natural dye on kepok and susu banana’s stem using four solvents was flavonoid. whereas tannin on both types of banana’s stem was only found in ethanol, acetone, and n-hexane extracts.Analysis using spectrophotometry UV-vis showed that n-hexane extracts gave the maximum absorption greater than the other solvents. The absorbance of kepok banana’s was 0.992 at 607.0 nm and of susu banana’s was 0.905 at 669.5 nm.
ADSORPSI ION FOSFAT OLEH LEMPUNG TERAKTIVASI ASAM SULFAT (H2SO4) Ida Norma Sinta; Putu Suarya; Sri Rahayu Santi
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
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 | Full PDF (224.575 KB) | DOI: 10.24843/JCHEM.2015.v09.i02.p12

Abstract

Activated clay can be used as an adsorbent to adsorb phosphate ions in solution. The aims of this research are to study the characteristics of the clay before and after activated (covering the surface acidity, surface area and basal spacing) and to study the adsorption capacity of activated clay to phosphate solution. The results showed, the activated clay gave surface acidity of 0.7202 mmol/g and 2.0018 mmol/g, surface area of 12.6602 m2/g dan 25.6101 m2/g, and d-spacing of montmorillonite was d (Å) = 0.12. The optimum condition for phosphate adsorption by this clay was found at 15 minutes contact time, pH 3, and  concentration of 70 ppm yielding phosphate adsorption capacity of 3.0349 mg/g following the Langmuir isotherm.
KEMAMPUAN TANAH HUTAN MANGROVE SEBAGAI SUMBER ENZIM DALAM HIDROLISIS ENZIMATIK SUBSTRAT SEKAM PADI Ni Luh Md. Widayantini; I Nengah Wirajana; Putu Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014
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 | Full PDF (129.397 KB) | DOI: 10.24843/JCHEM.2014.v08.i01.p06

Abstract

Cellulase activity of mangrove forest soil from Suwung Kauh Beach in Bali has been reported in previous study. An enzymatic hydrolysis of rice husk with this mangrove forest soil as a source of enzymes was conducted. The aim of this study was to determine the ability of this mangrove forest soil as a source enzymes in hydrolyzing rice husk with and without delignification incubated in varied durations. The rice husk with and without delignification were mixed with mangrove forest soil  and incubated at pH 7 and  29oC with a various incubation times of 0, 1, 2 , 3, and 4 weeks. Reducing sugar content of the results of incubation was measured by spectrophotometry using the Nelson-Somogyi method. The results of this study showed that the mangrove forest soil can hydrolyse the delignification rice husk, but could not degrade the rice husk without delignification. The highest reducing sugar content of 0,892 mg/100mL was resulted from hydrolysis of the delignification rice husk during one week. This result indicated that the mangrove forest soil as a source of cellulase had an ability in hydrolyzing the delignificated rice husk in pH 7 and 29oC incubated in one week.
PEMANFAATAN BATU PASIR LAUT WARNA HITAM TERAKTIVASI NaOH 4 N DAN TERSALUT Fe2O3 SEBAGAI ADSORBEN ION NITRAT I Nengah Simpen; Putu Suarya; Komang Yogi Purnamawati
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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Abstract

The research about adsorption of nitrate ion was carried out by black sandstone that was activated by 4 N NaOH and coated by Fe2O3, and washed by aquades with coating pH variation of 5, 7 and 11. The aim of this research is to find the ability of modified sandstone adsorbent in decreasing nitrate ion concentration. This research included the determination of surface acidity by acid-base titration method, determination of the specific surface area by blue methylene method, determination of equilibrium time of adsorption, adsorption isotherms and adsorption capacity of sandstone on nitrate ions by UV-vis spectrophotometer. The results showed that the highest surface acidity came from the sandstone activated with 4 N NaOH and Fe2O3-coated (A1) which was 0.4423 mmol/g, where as the highest specific surface area was owned by sandstone activated with 4 N NaOH and with Fe2O3-coated pH 7 (A3), which was 21.2899 m2/gram. Isotherm patterns were classified in the Langmuir adsorption isotherm with r value 0.9895. The highest nitrate ion adsorption capacity of the adsorbent at pH 4.19 was 2.8333 mg/g in equilibrium time of 90 minutes. In this study, sandstone activated with 4 N and coated with Fe2O3 was able to provide higher capacity than the sandstone control.
PENGARUH RASIO MOLAR MINYAK JELANTAH DENGAN METANOL DAN SUHU REAKSI DALAM REAKSI TRANSESTERFKASI TERKATALIS CaO/ZEOLIT ALAM TERHADAP YIELD BIODIESEL Ana Malia; Putu Suarya; Ida Ayu Raka Astiti Asih; I Made Wisnu Adhi Putra
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (249.262 KB) | DOI: 10.24843/JCHEM.2016.v10.i01.p07

Abstract

The research of transesterification reaction catalyzed by CaO/natural zeolite has been carried out. This work was aimed to obtain the high yield of biodiesel. The supporting process of CaO on natural zeolite (CaO/ZAA) was done by using wet impregnation method and characterization of CaO/ZAA was performed using XRD, FTIR and the determination of specific surface area of natural zeolite as CaO supporter was performed by BET method. This research aims to study the influence of transesterification reaction which was executed by varying molar ratio of oil to methanol and reaction temperature. Analysis of functional groups and minerals using FTIR and XRD, respectively, showed no significant changes before and after the impregnation of CaO on natural zeolites. CaO supported on natural zeolite was undetected by FTIR. Instead, it was detected by the vibration of carbonate groups as the result of the CO2 absorption by CaO and the result of surface area analysis using BET method showed that the greater the size of natural zeolite, the smaller the specific surface area of catalyst. The result analysis using BET method showed that the spesific surface area of 200 mesh sized natural zeolite as CaO supporter was 9.993 m2/g. The simple gravimetric test revealed that  the amount of CaO supported on 200 mesh sized natural zeolite was 0.2155 g/g. It was concluded that CaO/ZAA 200 mesh was the most suitable catalyst which was then used in the production of biodiesel. The transesterification result showed that the highest biodiesel yield of 98.34% was gained at molar ratio of oil to methanol of 1:15 and at the temperature of 60 oC. The GC-MS analysis indicated that the main components of the biodiesel were methyl palmitate and methyl oleate.
ADSORPSI ION LOGAM Pb2+ DAN Cu2+ OLEH BENTONIT TERAKTIVASI BASA (NaOH) Putu Aprilliana Indah Kumala Dewi; Putu Suarya; James Sibarani
Jurnal Kimia (Journal of Chemistry) Vol. 9, No. 2 Juli 2015
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 | Full PDF (192.9 KB) | DOI: 10.24843/JCHEM.2015.v09.i02.p14

Abstract

The aim of this study is to determine the adsorption capacity of NaoH activated bentonites in reducing metal ions Pb2+ and Cu2+ from their solutions. The characterization of the activated bentonites was carried out by determining the specific surface area using methylene blue adsorption method, the numbers of the active site by acid-base titration, and determining the basal spacing using X-ray diffraction (XRD). Adsorption parameters such as contact time, pH, and the isotherm adsorption curves were determined by atomic absorption spectrophotometer (AAS). The specific surface area and the number of active sites of the NaOH-activated Bentonite were 22.1017 m2/g and 32.8716 x 1020 atoms/g respectively. This vakue was higher than non-activated ones which were 12.6602 m2/g and 31.5847 x 1020 atoms/g respectively. The optimum condition of Pb2+ adsorption on activated bentonite was obtained at pH 3 with contact time under 5 minutes following the Langmuir isoterm pattern while the optimum condition of Cu2+ adsorption was obtained at pH 4 with contact time under 5 minutes following the Langmuir isoterm adsorption suggesting that the adsorption took place by chemical adsorption. The adsorption capacities of Pb2+ and Cu2+ were 185.50 mg/g and 30.00 mg/g respectively.
AKTIVITAS ANTIINFLAMASI EKSTRAK ETER KULIT BATANG TENGGULUN (Protium javanicum Burm) TERHADAP EDEMA PADA TIKUS WISTAR YANG DIINDUKSI DENGAN KARAGENAN A. A. Tia Santika Dewi; Ni Made Puspawati; Putu Suarya
Jurnal Kimia (Journal of Chemistry) Vol. 9, no. 1 Januari 2015
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 | Full PDF (99.839 KB) | DOI: 10.24843/JCHEM.2015.v09.i01.p03

Abstract

Stem bark of Tenggulun (Protium javanicum, Burm) has been used traditionally by Balinese people as anti-inflammatory agents. This research aimed to analyze phytochemical contents and to evaluate anti-inflammatory activity of stem bark ether extract of Tenggulun. Phytochemical study was done qualitatively using phytochemical reagents. Anti-inflammatory activity was evaluated on edema rats induced by carrageenan with given extract at doses of 125, 250, and 500 mg/kg b.w. Diclophenac sodium was used as the positive control. Phytochemical study revealed that the stem bark ether extracts consisted of alkaloids, steroids, terpenoids, and phenolic compounds.  Anti-inflammatory activity test  results showed at a dose of 125 mg/kg b.w, the extract only inhibit inflammation by 34.54%, while a dose of 250 mg/kg b.w gave inhibition of inflammation by 94.34%, and a dose of 500 mg/kg b.w can inhibit inflammation by 96.11% during 360 minutes observation. Probit analysis gave ED50 value of 103.252 mg/kg B.W.
ISOLASI ENZIM AMILASE DARI KECAMBAH BIJI JAGUNG LOKAL SERAYA (Zea mays L.) UNTUK HIDROLISIS PATI Sri Wahyuni; Putu Suarya; I Made Ary Saputra
Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017
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 | Full PDF (247.644 KB) | DOI: 10.24843/JCHEM.2017.v11.i02.p04

Abstract

Penelitian ini bertujuan untuk mengetahui waktu optimum dari amilase yang dapat menghasilkan aktivitas enzim tertinggi dan untuk mengetahui konsenstrasi garam ammonium sulfat optimum untuk mendapatkan aktivitas amilase tertinggi dari perkecambahan jagung lokal Seraya. Aktivitas amilase diperoleh dari mereaksikan ekstrak enzim yang telah dilarutkan dalam buffer fosfat pH 7 dengan substrat pati. Campuran diinkubasi pada suhu 70C selama 20 menit. Hasil reaksi yang berupa gula pereduksi dianalisis dengan reagen DNS menggunakan metode spektrofotometri pada panjang gelombang 515,6 nm. Hasil yang diperoleh menunjukkan bahwa aktivitas amilase tertinggi didapat dari perkecambahan biji jagung pada jam ke-42 danfraksinasi garam ammonium sulfat dengan konsentrasi 0-20% jenuh.
KURSUS SINGKAT DAN PELATIHAN PENGOLAHAN SALAK MENJADI DODOL SALAK DI DESA SIBETAN KECAMATAN BEBANDEM KABUPATEN KARANGASEM Putu Suarya; I Wayan Sudiarta; Anak Agung Made Dewi Anggreni; Ni Nyoman Puspawati; I G A Lani Triani
Buletin Udayana Mengabdi Vol 6 No 2 (2007): Volume 6 No.2 - September 2007
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

ABSTRACT The farmers of salaks, the snake fruits of Sibetan Village have encountered the price tumble during the harvest time. The bumper crops during the harvest while at the same time there is a steady demand on it, as well as that there has not been an effort to process the abundant crops into a preserved foods are considered to be the main factors that cause its price drop. Training and short course have been conducted to introduce the way how to process the fruits into dodol salak, a sticky cake made of the salak fruit as the main material, by conducting the lecturing and practicing method. The participants were members of family welfare organization (PKK) and the local housewives from Telutug of Sibetan village with the total number of 32 participants, and most of them are the farmers of salaks. The process of making the dodol salak comprises the following steps : the collection and selection of the fruits, peeling and coring the fruit, steaming, mashing the fruits into a pulp, the mixing with coconut milk, palm sugar and sticky rice floor in the bowl, mixing and boiling the mixture within 120 minutes, cooling down and then it is molded and wrapped. The result of the training shows that the participants were really enthusiastic, it could be seen by the abundant of questions raised either during the lecture, discussion as well as during the practice of making the dodol salak itself. It is expected that by introducing the way how to process the fruits into dodol will improve the skill and knowledge of the local people in general and especially for those of PKK members and the housewives. The food processing into dodol salak may bring about many advantages such as the diversification of the fruit processed-product, giving the added value to the fruit, to lengthen the storage time and to improve the appearance and quality of the product.
KURSUS SINGKAT DAN PELATIHAN PENGOLAHAN SALAK MENJADI DODOL SALAK DI DESA SIBETAN KECAMATAN BEBANDEM KABUPATEN KARANGASEM PUTU SUARYA; I WAYAN SUDIARTA; ANAK AGUNG MADE DEWI ANGGRENI; NI NYOMAN PUSPAWATI; I G A LANI TRIANI
Buletin Udayana Mengabdi Vol 6 No 1 (2007): Volume 6 No.1 - April 2007
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat

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Abstract

ABSTRACT The farmers of salaks, the snake fruits of Sibetan Village have encountered the price tumble during the harvest time. The bumper crops during the harvest while at the same time there is a steady demand on it, as well as that there has not been an effort to process the abundant crops into a preserved foods are considered to be the main factors that cause its price drop.Training and short course have been conducted to introduce the way how to process the fruits into dodol salak, a sticky cake made of the salak fruit as the main material, by conducting the lecturing and practicing method. The participants were members of family welfare organization (PKK) and the local housewives from Telutug of Sibetan village with the total number of 32 participants, and most of them are the farmers of salaks. The process of making the dodol salak comprises the following steps : the collection and selection of the fruits, peeling and coring the fruit, steaming, mashing the fruits into a pulp, the mixing with coconut milk, palm sugar and sticky rice floor in the bowl, mixing and boiling the mixture within 120 minutes, cooling down and then it is molded and wrapped.The result of the training shows that the participants were really enthusiastic, it could be seen by the abundant of questions raised either during the lecture, discussion as well as during the practice of making the dodol salak itself. It is expected that by introducing the way how to process the fruits into dodol will improve the skill and knowledge of the local people in general and especially for those of PKK members and the housewives. The food processing into dodol salak may bring about many advantages such as the diversification of the fruit processed-product, giving the added value to the fruit, to lengthen the storage time and to improve the appearance and quality of the product.
Co-Authors A. A. Tia Santika Dewi Ana Malia Anak Agung Istri Agung Mayun Laksmiwati Anak Agung Made Dewi Anggreni Emmy Sahara I Gusti Ayu Adesia Saraswati I Gusti Ayu Kunti Sri Panca Dewi I Gusti Ayu Lani Triani I Made Ary Saputra I Made Siaka I Made Wisnu Adhi Putra I Nengah Simpen I Nengah Wirajana I Putu Meda Parmiko I Wayan Suarsa I Wayan Sudiarta I Wayan Sudiarta I Wayan Suirta I. A. R. Astiti Asih Ida Bagus Amertha Putra Manuaba Ida Norma Sinta Ika Kurniawati Iryanti Eka Suprihatin James Sibarani Kadek Ari Esta Komang Yogi Purnamawati Ni G. A. M. Dwi Adhi Suastuti Ni Luh Md. Widayantini Ni Made Puspawati Ni Nengah Kartini Asih Ni Nyoman Puspawati Ni Putu Diantariani Putu Aprilliana Indah Kumala Dewi Putu Sri Gayatri Sitanggang, Katrin Walensky Sri Rahayu Santi Sri Wahyuni Wahyu Dwijani S.