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Jurnal Kimia (Journal of Chemistry)

jchem
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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 518 Documents

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SUPLEMEN EKSTRAK DAUN SIRIH, Piper betle, Lin DALAM MENURUNKAN KADAR MALONDIALDEHID PADA TIKUS WISTAR I W. Suirta; I. A. R. A. Asih
Jurnal Kimia (Journal of Chemistry) Vol.13 No.2 Juli 2019
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Betel leaf extract supplements, Piper betle Lin , was made by extracting maceration of betel leaves with ethanol 96%. Phytochemical screening of betle leaf extract obtained secondary metabolites such as : terpenoids, steroids, phenolics, and saponins . The results of the antioxidant activity test test showed that n-hexane fraction was more reactive as an antioxidant (IC50 26,73 mg/L) than the diethyl ether fraction (IC50 114,54 mg/L). The MDA analysis showed that the betel leaves have a very good ability to reduce MDA levels. The concentration of MDA with addition of allopurinol (as positive control) was 0,41±0,0021?L/mL, while with addition of betel leaves the level was 0,44±0,0021?L/mL. The structure identification obtained active antioxidant compounds such as: cavicol, eugenol, caryophilene and isoeugenol. Keywords : betel leaf, malondialdehyde, Piper betle, wistar rat

ISOLASI DAN IDENTIFIKASI SENYAWA ANTIMAKAN DARI BATANG TUMBUHAN BROTOWALI (Tinospora tuberculata BEUMEE.) I M. Sukadana; Wiwik Susanah Rita; Frida R. Koreh
Jurnal Kimia (Journal of Chemistry) Vol. 1, No. 2 Juli 2007
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 antifeedant compounds from brotowali stem (Tinospora tuberculataBEUMEE.) was done. Brotowali dry powder of 1 kg was extracted using methanol by maceration, The methanolextract then was fractionated repeatedly by n-hexane, so that methanol and n-hexane extracts were obtained. Both ofextracts were evaporated by rotary vacuum evaporator, so concentrated methanol and n-hexane extracts wereobtained and then their antifeedant activity was tested. More active extract was separated by thin layerchromatography (TLC) then continued by column chromatography utilizes silica gel 60 as a stationary phase and thebest mobile phases of TLC. Fractions obtained were tested of their antifeedant activity. More active fraction thenwas tested its purity and identified by phytochemical test and UV-vis and infrared spectrophotometer.As much as 97.07 g of concentrated methanol extract was resulted from 1 kg brotowali dry powder.Fractionation of the methanol extract using n-hexane resulted 22.92 g of concentrated methanol and 21.71 g ofconcentrated n-hexane. n-hexane extract points out more activity as antifeedant than methanol extract. The bestmobile phase of TLC was n-hexane: chloroform (1:1 ). The unite result from the column chromatography wasobtained 3 fractions where fraction c points out antifeedant active. The purity test of fraction c was obtained 1 spotso continued by phytochemical test and UV-vis and infrared spectrophotometer. Phytochemical test andspectrophotometry analysis from active isolate (fraction c) point out that the compound included triterpenoid groupthat absorb on wavelength 288.6 nm and 310.6 nm, and be considered having functional group of O-H bonded, CO,C-H, C=O, C=C, and C-H.

SPESIASI DAN BIOAVAILABILITAS LOGAM Cu DAN Zn DALAM PERAIRAN DAN SEDIMEN MUARA SUNGAI BADUNG PADA JALUR TAMAN HUTAN RAYA NGURAH RAI DENPASAR BALI Dewa Ayu Puspasari; Iryanti Eka Suprihatin; I G. A. Kunti Sri Panca Dewi
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

Metal concentration in water enviroment and sediment cannot give sufficient information about bioavailability of those metals in the waterworks. The aims of this study are to determine the bioavailability and specification of Cu and Zn in water enviroment and sediment in the estuary of Badung river in the “Taman Hutan Raya Ngurah Rai” Denpasar, Bali area. Determination of bioavailability and speciation of those metals were accomplished by sequencial extraction method. The results of this study show that total concentrations of Cu, and Zn in the water samples are 0,1792 mg/L, and 0,0647 mg/L. The sum of the fraction of non-resistant and resistant fractions of Cu and Zn in the sediment obtained in this study indicates the total concentration of metals in the sediment, i.e 33,9036 mg / kg and 50,8296 mg/kg. Results of the metal speciation are as follow: fraction of Cu is dominated by resistant fraction that is 64,38 %, whereas non-resistant fractions are: 3,70 % for acid reducible and 31,89% for oxidisable organic. Fraction of Zn is dominated by acid reducible fraction of 39,27 %, followed by organic oxidisable of 25,46 % and EFLE fraction of 1,80%, whereas the resistant fraction is 33,47 %. The percentages of Cu and Zn bioavailabilities respectively are 35,59 % ; and 66,53 %.

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (301.281 KB)

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.

ADSORPSI DAN DESORPSI Cr(VI) PADA ADSORBEN BATU CADAS KARANGASEM HASIL LIMBAH KERAJINAN CANDI BALI TERAKTIVASI NaOH DAN TERSALUT Fe(OH)3 I Made Dupi Andika; I Nengah Simpen; Ketut Gede Dharma 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

This research discusses the adsorption-desorption of Cr(VI) by the adsorbent made from Karangasem cadas rock which is the waste of Balinese temple production. The adsorbent was activated with NaOH and coated with Fe(OH)3. The aim of the study was to investigate the capability of cadas rock in Cr6+ adsorption. The rock was activated with various concentrations of NaOH followed by coating process with Fe(OH)3. Each adsorbent was characterized for its specific surface area and surface acidity. The equilibrium time, adsorption isotherms and adsorption capacity were also investigated. The adsorbent with the highest adsorption capacity was then desorbed using HNO3 2 mol/L, NaOH 1 mol/L, and saturated NH4Cl. The result suggested that the highest surface acidity was showed by the control adsorbent which was 0.2836 ± 0.0106 mmol/g with an acid site of 1.7079 x 1020 atoms/g. The highest spesific surface area was showed by the adsorbent activated with 6M NaOH and coated with Fe(OH)3, which was 34.5042 m2/g. The highest adsorption capacity was showed by the same adsorbent, which was 2.5253 mg/g with interaction time of 15 minutes at pH 5. This met the pattern of Langmuir adsorption isotherm. HNO3 was the most effective desorption substance resulted in a percentage of Cr desorbed of 2,15%.

ADSORPSI MULTI LOGAM BERAT KROM(III), TIMBAL(II), DAN TEMBAGA(II) DALAM SISTEM LARUTAN BINARY OLEH SILIKA GEL TERIMOBILISASI DIFENILKARBAZIDA I. W. Sudiarta; P. Suarya; C. M. P. Widya
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

Adsorpsi multi ion logam, timbal( P), tembaga(Cu), dan krom(Cr) dalam sistem larutan binary Pb(II)-Cr(III), Cr(III)-Cu(II), dan Pb(II)-Cu(II) menggunakan adsorben silika gel terimobilisasi difenilkarbazida (Si-DPZIDA) dengan metode bath adsorpsi pada pH 2 dan waktu pengadukan 8 jam. Sistem larutan binary terdiri dari ion logam utama dan ko-kation, dengan konsentrasi logam ko-kation bervariasi 0,5; 1,0; dan 1,5 mM, sedangkan konsentrasi ion logam utama tetap 5,0 mM. Tujuan adsorpsi multi ion logam ini adalah untuk mengetahui efek dari kehadiran ko-kation terhadap adsorpsi ion logam utama. Hasil penelitian menunjukkan bahwa kehadiran Cr(III) maupun Cu(II) sebagai ko-kation memberikan efek sinergis terhadap daya serap Pb(II), sinergistik tertinggi terjadi pada konsentrasi Cr(III) 1,5 M dan Cu(II) 1,0 mM dengan daya serap Pb(II) masing-masing 0,5808 dan 0,5867 mmol/g. Daya adsorpsi logam Cr(III) mengalami efek sinergistik dengan kehadiran ko-kation Pb(II) maupun Cu(II). Efek sinergis terbesar terjadi pada konsentrasi Pb(II) 0,5 mM dan Cu(II) 0,5 mM, masing-masing dengan daya sorpsi Cr(III) 0,1041 dan 0,1010 mmol/g. Pada adsorpsi ion logam utama Cu(II), kehdiaran Cr(III) maupun Pb(II) memberikan efek antagonistik. Efek antagonistik tertinggi terjadi pada kehadiran ko-kation Cr(III) dan Pb(II) pada konsentrasi 0,5 mM dan 0,5 mM, dengan daya serap Cu(II) masing-masing sebesar 0,2768 dan 0,2736 mmol/g. Kata kunci: adsoprsi multi logam, larutan binary, silika gel terimobilisasi, efek sinergistik, dan antagonistik

KANDUNGAN ALUMINIUM DALAM KALENG BEKAS DAN PEMANFAATANNYA DALAM PEMBUATAN TAWAS Manuntun Manurung; Irma Fitria Ayuningtyas
Jurnal Kimia (Journal of Chemistry) Vol. 4, No. 2 Juli 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 (74.419 KB)

This research was performed to analyze the aluminium content in several wasted cans. The analysis usedAAS at 309.3 nm. This method was chosen since its operation is relatively simple but capable of analyzing low metalcontents (less than 1 ppm). The aluminium content of wasted cans ranges from 1.41% up to 16.04%. The aluminiumwas used to make alum, with the percentage of yield of 77.04% up to 96.81%, depending on the type or cans. Inother words, one gram of wasted cans produced 0.2335 grams up to 2.6857 grams of alum. The produced alum wascapable of purifying water.

7-HIDROKSI-6-METOKSI KUMARIN (SKOPOLETIN) DARI KULIT BATANG Chisocheton celebicus (MELIACEAE) Dewa G. Katja; Andre A. Sonda; Desi Harneti P. Huspa; Tri Mayanti; Unang Supratman
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

7-hydroxy-6-methoxy coumarin (scopoletin) has been isolated from the bark of Chisocheton celebicus (Meliacee) using several chromatographic techniques. The chemical structure of 7-hydroxy-6-methoxy coumarin was identified on the basis of spectroscopic data including UV, IR, 1D-NMR, 2D-NMR and mass along with by comparison with those spectral data previously reported. The discovery of scopoletin from the bark C. celebicus reported for the first time in this study.

AKUMULASI LOGAM KROMIUM (Cr) DALAM SEDIMEN, AKAR DAN DAUN MANGROVE Avicennia marina DI MUARA SUNGAI BADUNG A. A. Sg. Istri A. Suwandewi; Iryanti Eka Suprihatin; Manuntun Manurung
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 2 Juli 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Research on Cr metal content in the sediment, roots and leaves of the Avicennia marina in estuary of Badung river has been conducted. This study was aimed to determine the ability of Avicennia marina in accumulating chromium from the ecosystem where the plant grows. The concentrations of Chromium were determined by the use of Atomic Absorption Spektrcophotometer followed by a calibration standard method. The results showed that the roots of the Avicennia marina accumulated Cr metal most. Total concentrations of Cr metal in leaves was 0,9579 mg/kg and in the roots was 1,9680 mg/kg, while in the sediment 0,4536 mg/kg. Based on the amount of metal accumulation in the roots and leaves of mangrove, it can be suggested that the Avicennia marina was capable of accumulating Cr present in the ecosystem.

EKSTRAKSI DAN KARAKTERISASI MINYAK ATSIRI BUNGA KENANGA (Cananga odorata) DAN APLIKASINYA SEBAGAI PENOLAK NYAMUK PADA LOTION DAN PARFUM J. J. Setia Budi; N. L. Yuli Damayanti; Y. Rama Dhani; N. P. Antari Dewi
Jurnal Kimia (Journal of Chemistry) Vol. 12 No.1 Januari 2018
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Tujuan penelitian ini adalah untuk mengetahui karakteristik minyak atsiri bunga kenanga (Cananga odorata) hasil destilasi uap serta aplikasinya sebagai lotion dan parfum penolak nyamuk. Hasil karakterisasi minyak atsiri bunga kenanga yang ditinjau dari warna, bau, dan indeks-biasnya telah memenuhi standar kualitas minyak atsiri bunga kenanga menurut SNI 06-3949-1005. Namun demikian, bobot jenisnya yang sebesar 1,034 g/mL tidak sesuai dengan SNI. Hasil analisis komponen kimia penyusun minyak atsiri menggunakan GC-MS (Gas Chromatography-Mass Spectrometry) menunjukkan bahwa ada beberapa komponen utama dalam minyak atsiri yang teridentifikasi diantaranya yaitu benzyl benzoate, caryophyllene, linalool dan eugenol. Selanjutnya, uji efektivitas minyak atsiri bunga kenanga sebagai penolak nyamuk dalam bentuk lotion dan parfum menghasilkan bahwa minyak atsiri bunga kenanga dalam bentuk lotion lebih efektif mengusir nyamuk hingga 100% pada konsentrasi minyak kenanga 7,5%, sedangkan dalam bentuk parfum dapat mengusir nyamuk 100% pada konsentrasi 20%.

Page 17 of 52 | Total Record : 518

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Ni Putu Diantariani

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Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Home Page

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Contact Name Ni Putu Diantariani

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Phone +628123640424

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Editorial Address Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

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Contact Name
Ni Putu Diantariani

Contact Email
jurnalkimia@unud.ac.id

Phone
+628123640424

Journal Mail Official
jurnalkimia@unud.ac.id

Editorial Address
Program Studi Kimia Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Udayana Kampus Bukit Jimbaran, Jimbaran, Bali, Indonesia

Location
Kota denpasar,

Bali

INDONESIA