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Jurnal Kimia (Journal of Chemistry)
Published by Universitas Udayana
ISSN : 19079850     EISSN : 25992740     DOI : 10.24843/JCHEM
Core Subject : Science,
Chemistry
Jurnal Kimia (Journal of Chemistry) publishes papers on all aspects of fundamental and applied chemistry. The journal is naturally broad in scope, welcomes submissions from across a range of disciplines, and reports both theoretical and experimental studies.
Arjuna Subject : Kimia(semua kategori) - Kimia (Lain-Lain)
Articles 491 Documents
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MINYAK ATSIRI DAUN TENGGULUN (Protium javanicum Burm.F.) SEBAGAI REPELAN NYAMUK DEMAM BERDARAH (Aedes aegypti) Gusti Ayu Primandari Utami; Sri Rahayu Santi; Ni Made Puspawati
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 (176.892 KB) | DOI: 10.24843/JCHEM.2014.v08.i01.p12

Abstract

Tenggulun leaves (Protium javanicum Burm.F.) have been used traditionally as a medicine and insecticide. Activity test of essential oils from Tenggulun leaves as repellent against Aedes aegypti was done at concentrations of 7.5%, 15%, 20%, and 40% in 96% ethanol to determine its effectiveness. The essential oils were obtained by steam distillation methods, while the repellent activity test was conducted using Aedes aegypti adult females. Isolation of 12 kg fresh tenggulun leaves using steam distillation yielded 0.07% yellowish oils (13.7 mL) with the density of 0.8774 g/mL and sour sting smell. Gas chromatogram of the essential oils indicated that there were 13 compounds and identification of each compounds based on their mass spectra suggested that the compounds were ?-pinene (16.85%), myrcene (1.53%), ?-phellandrene (45.34%), p-cymene (5.60%), limonene (15.70%), ?-ocimen (0.34%), bicyclogermacrene (1.61%), ?-elemene (2.27%), ?-caryophyllene (7.90%), ?-humulene (0.88%), germacrene (1.50%), spathulenol (0.23%), caryophyllene oxide (0.24%). The repellent test result analyzed by One Way ANOVA indicated that at each concentration of the essential oils given showed significant differences during 6 hours treatment. Furthermore Tukey HSD test result showed that the essential oils at  concentration of 40%  revealed repellent activity which was comparable to positive control at the start of the test until the fifth hour of testing. Four of the compounds which are ?-pinene, myrcene, limonene and ?-caryophyllene have been known to have activity as repellent against mosquitoes.
ALTERNATIF PENGGUNAAN SILIKA BENTONIT SEBAGAI PENGGANTI FENOL-KLOROFORM-ISOAMIL ALKOHOL DALAM EKSTRAKSI DNA SECARA LANGSUNG DARI TANAH HUTAN MANGROVE Khisan Qamariya; Wahyu Dwijani Sulihingtyas; I Nengah Wirajana
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 (60.151 KB) | DOI: 10.24843/JCHEM.2016.v10.i01.p06

Abstract

Research on comparing the metagenomic DNA extraction from mangrove forest soil with phenol-chloroform-isoamyl alcohol and with silica bentonite was conducted. The purpose of this study was to find the differences in quality and quantity of metagenomic DNA extracted. The silica bentonite was compared to meet the Green Chemistry concept. The metagenomic DNA from these extractions were analyzed by agarose gel electrophoresis and UV-Vis spectrophotometry. The results of electrophoresis showed that metagenomic DNA extracted with silica bentonite were relatively higher in concentration than with phenol-chloroform-isoamyl alcohol; but integrity of their DNA were the same. The results of UV-Vis spectrophotometry analysis showed that A260/230 ratio of the phenol-chloroform-isoamyl alcohol extract had higher relative purity level to humic acid. The A260/280 ratio of the final elution of the silica bentonite extraction showed the highest relative purity level to protein.
STANDARISASI DAN SKRINING FITOKIMIA EKSTRAK ETANOL 70% DAUN JERUK LIMAU (Citrus amblycarpa (Hassk.) Osche) G. M. D. Putra; D. A. Satriawati; N. K. W. Astuti; A. A. G. R. Yadnya-Putra
Jurnal Kimia (Journal of Chemistry) Vol.12 No.2 Juli 2018
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 (156.662 KB) | DOI: 10.24843/JCHEM.2018.v12.i02.p15

Abstract

Jeruk limau (Citrus amblycarpa (Hassk.) Osche) merupakan tanaman endemik Indonesia yang memiliki potensi besar sebagai obat. Pendekatan kemotaksonomi terhadap daun C. amblycarpa dilakukan untuk memprediksi potensinya dalam pengobatan. Sebelum dilakukan pengujian aktivitas farmakologi, serbuk dan ekstrak yang diperoleh dari hasil ekstraksi menggunakan pelarut etanol 70% terlebih dahulu dilakukan studi pendahuluan meliputi perhitungan persentase rendemen ekstrak, pemeriksaan organoleptik dan mikroskopik serbuk, standarisasi serbuk dan ekstrak, dan skrining fitokimia untuk mengetahui kandungan metabolit sekunder dari daun C. amblycarpa. Standarisasi yang dilakukan meliputi penetapan kadar abu total, penetapan kadar abu tidak larut asam, penetapan kadar abu larut air, dan penetapan kadar air dari serbuk simpilisa dan ekstrak. Skrining fitokimia terhadap ekstrak etanol 70% daun C. amblycarpa meliputi pemeriksaan alkaloid, pemeriksaan flavonoid, pemeriksaan polifenol dan tanin, pemeriksaan glikosida, pemeriksaan steroid dan triterpenoid, pemeriksaan saponin, serta pemeriksaan minyak atsiri. Hasil skrining fitokimia menunjukkan bahwa ekstrak etanol 70% daun C. amblycarpa mengandung senyawa golongan flavonoid, polifenol dan tanin, glikosida, serta minyak atsiri. Kata Kunci: Citrus amblycarpa (Hassk.) Osche, jeruk limau, standarisasi, skrining fitokimia
ISOLASI DAN IDENTIFIKASI SENYAWA YANG BERPOTENSI SEBAGAI ANTITUMOR PADA DAGING BUAH PARE (Momordica charantia L.) Wiwik Susanah Rita; I W. Suirta; Ali Sabikin
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 1 Januari 2008
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 (79.36 KB)

Abstract

Isolation and identification of the compound which has a potency as antitumor from bitter melon have beencarried out. Extraction was conducted n-hexane, chloroform, and ethanol respectively using each extracts obtainedwere examined with brine shrimp lethality test. The most toxic extract was ethanol extract (LC50 223 ppm).Separation and purification of the compounds from the ethanol extract were conducted by column chromatogaraphyusing a gel silica 60 as the stationary phase and benzene : acetic acid ( 8:2) as the mobile phase. This yielded 3fractions. Then the fractions were examined with brine shrimp lethality test and the most toxic fraction was found tobe the fraction 1 (LC50 31,62 ppm), but the fraction that was analysed further was fraction 3 (LC50 100 ppm),because fraction 1 consists of using compounds that were difficult to separate. The purity fraction 3 was testedconducted thin layer chromatography and its activity as antitumor agent was tested using Agrobacterium tumefacienA-208. The test was in 6 weeks and that fraction 3 has a potency as an antitumor agent at 1000 ppm.The identification with gas chromatography – mass spectroscopy indicate that the antitumor isolate frombitter melon contains 3 mayor compoundsnamely dioxtyl hexadioate esther, palmitic acid, stearic acid.
ADSORPSI ION LOGAM Cr(III) PADA SILIKA GEL DARI ABU SEKAM PADI TERMODIFIKASI LIGAN DIFENILKARBAZON (Si-DPZon) Ni Ketut Suminten; I Wayan Sudiarta; I Nengah Simpen
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (101.375 KB) | DOI: 10.24843/JCHEM.2014.v08.i02.p14

Abstract

The adsorption of Cr (III) using silica gel from rice husk ash modified with diphenilcharbazon ligand (Si-DPZon) was investigated.The aim of this study was to determine the optimum pH and contact time, the pattern of adsorption isotherm as well as the type of interaction between metal ion and the silica gel through sequential desorption. The result showed that the silica gel resulted has a surface acidity (Kal) of 0.1046 mmol/g and number of active sites of 17,9672 x 1020 atoms/gram. The adsorption optimum pH is 3.0 with the optimum contact time of 30 minutes where the Cr(III) adsorbed is 24,5047 mg/g. The adsorption follows the Freundlich isotherm. Interaction that occurs between the Cr (III) and the Si-DPZon adsorbent is dominated by physical interaction.
SINTESIS POLIEUGENOL DARI EUGENOL DENGAN KATALIS ASAM NITRAT PEKAT DAN MEDIA NATRIUM KLORIDA I Wayan Suirta; Ni Luh Rustini; Taka Iqbal Prakasa
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 1 Januari 2012
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 (455.507 KB)

Abstract

Polyeugenol has been synthesized from eugenol by using nitric acid as a catalyst and sodium chloride medium. Eugenol was obtained from clove oil which was previously redestill. The synthesis was carried but by using nitric acid catalyst on sodium chloride medium and without sodium chloride. The ratio of nitric acid to eugenol as 4 : 1. Polymerization result was analyzed by using infrared spectroscopy. Its rendement and its characteristics were also.The yield with sodium chloride medium was 42,97 %, a reddish black gel with melting point of 114,6-150oC. The yield without sodium chloride medium was 47,77 %, a solid brick red with melting point of 87-89oC. The infrared spectroscopy result showed that on the polymerization with medium was unsuccessful because the still CH=CH2 group absorption at 995.27 cm-1 and C=C at 1635,89 cm-1 were still existed, whereas for the polymerization without medium, both absorptions were absent.
ISOLASI, IDENTIFIKASI, SERTA UJI AKTIVITAS ANTIBAKTERI PADA MINYAK ATSIRI SEREH WANGI (Cymbopogon winterianus Jowitt) Ni Made Puspawati; I Wayan Suirta; Saeful Bahri
Jurnal Kimia (Journal of Chemistry) Vol. 10, No. 2 Juli 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 (366.606 KB) | DOI: 10.24843/JCHEM.2016.v10.i02.p08

Abstract

Sereh wangi (Cymbopogon winterianus Jowitt) merupakan salah satu tanaman yang dimanfaatkan sebagai obat tradisional. Penelitian ini bertujuan untuk menguji aktivitas antibakteri dan mengidentifikasi komposisi senyawa kimia minyak atsiri yang diekstraksi dari daun dan batang sereh wangi. Ekstraksi minyak atsiri dilakukan menggunakan metode destilasi uap dan komposisi kimianya diidentifikasi dengan KG-SM (Kromatografi Gas-Spekrometer Massa). Minyak atsiri yang diekstrak dari daun dan batang sereh wangi berwarna kuning muda dengan rendemen berturut-turut 0,31% dan 0,10%. Hasil uji aktivitas antibakteri terhadap bakteri Eschericia coli dan Staphylococcus aureus menunjukkan bahwa aktivitas antibakteri minyak atsiri daun dan batang sereh wangi bergantung pada konsentrasinya. Pada konsentrasi minimum 25 ppm, minyak atsiri daun aktif dengan diameter hambat sebesar 4,0 mm untuk E.coli dan 3,0 mm untuk S.aureus. Aktivitas penghambatan yang kuat terhadap bakteri E.coli didapatkan pada konsentrasi 100 ppm (10,25 mm pada daun dan 10,62 mm pada batang) dan terhadap S.aureus pada konsentrasi 100 ppm (11,25 mm pada batang). Hasil identifikasi dengan KG-SM, minyak atsiri pada daun dan batang memberikan 12 puncak senyawa dengan waktu retensi yang sama dengan luas area yang berbeda pada kromatogramnya. Hal ini menunjukkan komposisi kimia yang sama pada minyak atsiri daun dan batang sereh wangi. Berdasarkan hasil identifikasi dapat disimpulkan bahwa komponen utama dari minyak atsiri daun dan batang sereh wangi adalah sitronellal, cis-sitral, geraniol dan geranil asetat.
KANDUNGAN LOGAM BERAT TOTAL Pb DAN Cd DALAM SEDIMEN DAN BUAH PEDADA (Sonneratia alba) DI MUARA SUNGAI BADUNG N. K.D.S. Widari; I M. Siaka; I. E. Suprihatin
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (54.866 KB) | DOI: 10.24843/JCHEM.2019.v13.i01.p07

Abstract

This paper discusses the total contents of Pb and Cd metals in sediment and pedada fruit (Sonneratia alba) collected from Estuary of Badung River. Wet digestion method using reverse aqua regia was performed to extract the metals. All metals were measured using Atomic Absorption Spectrophotometer (AAS). The results showed that the total contents of Pb and Cd in the sediments were 288.0131-376.0544 and 1.4849-7.0230 mg/kg, respectively, while in the pedada fruit were 160.0212-245.4012 and 3.8151-14.6917 mg/kg, respectively. Based on the results, the content of Pd and Cd in the sediment and pedada fruit in the area of Badung River Estuary exceeded the limits allowed indicating that the sediment and the pidada fruts are polluted by Pb and Cd metals
AKTIVITAS ANTIRADIKAL BEBAS SERTA KADAR BETA KAROTEN PADA MADU RANDU (Ceiba pentandra) DAN MADU KELENGKENG (Nephelium longata L.) I M. Oka Adi Parwata; K. Ratnayani; Ana Listya
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 1 Januari 2010
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 (163.94 KB)

Abstract

It has been done the determination of free antiradical activity and beta caroten concentration on randu honey(Ceiba pentandra) and kelengkeng honey (Nephelium longata L.). The free antiradical activity determined bydiphenyl pykril hydrazil (DPPH) method according to sphectrophotometry UV-Vis, before that the honey was dilutedwith methanol and then the absorbance was measured on 497nm, 517 nm, and 537 nm. The beta karotenconcentration determination was done TLC-Sphetrophotodensitometrically by using beta caroten standard; the honeywhich was resulted by methanol maseration was partiated with acetone p.a. The next step was done by TLC withethyl acetate as an eluent : chloroform (3:7) and the peak of the analyt was read on TLC scanner 3.The result showed that the free antiradical activity on kelengkeng honey was greater than randu honey.Whereas the beta caroten concentration on kelengkeng honey was fewer than beta caroten concentration randuhoney. The activity of free antiradical and beta caroten concentration was 82,10 % and 1,9687 mg/100 g respectively,whereas for randu honey was 69,37 % and 3,6327 mg/100 g respectively.
SPESIASI DAN BIOAVAILABILITAS LOGAM BERAT Cu DAN Zn DALAM TANAH PERTANIAN ORGANIK DI DAERAH BEDUGUL Tri Rahayu; I Made Siaka; Ida Ayu Gede Widihati
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 (187.393 KB) | DOI: 10.24843/JCHEM.2015.v09.i02.p07

Abstract

A research on heavy metal speciation and bioavailability of Cu and Zn in soil of organic agriculture in Bedugul area has been carried out. This study aimed to determine the total metal content, speciation, and bioavailability of Cu and Zn in the soil of organic agriculture aged 5 and 4 years in Bedugul area. The total metal content was performed by the used of a digestion method with a mixture of HNO3 and HCl (3:1) in the ultrasonic bath and followed by heating on the hotplate. Speciation and bioavailability of Cu and Zn was conducted using SET (Sequential Extraction Technique). The content of Cu and Zn in the total sample was analyzed using the Atomic Absorption Spectrophotometer (AAS) with a calibration curve method. The total metal concentrations of Cu in the organic agricultural land of aged 5 and 4 years and were 41.8808-49.1060 mg/kg and 22.8544-41.6616 mg/kg  whereas the concentrations of Zn  in the organic agricultural land of aged 5 and 4 years were 62.9273-73.3729 mg/kg and 58.0970-73.9987 mg/kg respectively. The speciation of Cu obtained in in the organic agricultural land of aged 5 and 4 years was ranged from 6-17% and 3-14% in the EFLE fraction, from 9 to 37% and 6 to 24%  in the Fe/Mn oxides fraction, and ranged from 27 to 53% and 41 to 69% in the resistant fraction (non bioavailable). The Zn speciation found in the organic agricultural land of aged 5 and 4 years was ranged from 6 to 9% and 7 to 10% the EFLE fraction (bioavailable), from 15 to 22% and 11 to 25% in the Fe/Mn oxides and organic (potentially bioavailable) fractions and ranged from 46 to58% and 40 to 53%  in the silicate fraction (non bioavailable).

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