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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 518 Documents
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IDENTIFIKASI DAN UJI AKTIVITAS SENYAWA TRITERPEN DARI DAUN TREMBESI (Samanea saman (Jacq.) Merr) TERHADAP Escherichia coli I Gede Putra Sedana; Wiwik Susnah Rita; I Made Suthanegara
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 (308.881 KB) | DOI: 10.24843/JCHEM.2016.v10.i02.p14

Abstract

Isolasi dan identifikasi senyawa triterpen dari daun trembesi (Samanea saman (Jacq.) Merr) dan uji aktivitasnya terhadap Escherichia coli (E.coli) telah dilakukan. Penelitian bertujuan untuk mengetahui karakteristik senyawa triterpen yang terdapat dalam daun trembesi serta aktivitasnya terhadap E.coli. Ekstraksi dilakukan dengan metode maserasi dan partisi, pemisahan senyawa dilakukan dengan kromatografi kolom, sedangkan uji aktivitas terhadap E.coli dengan metode difusi cakram, dan identifikasi dilakukan dengan spektrofotometer Ultraviolet-visible (UV-vis) dan Inframerah. Sebanyak 1 kg serbuk kering daun trembesi dimaserasi dengan etanol menghasilkan 73,38 g ekstrak pekat etanol. Ekstrak pekat etanol dilarutkan dengan etanol: air (3:7), kemudian etanol diuapkan sehingga diperoleh ekstrak air. Ekstrak air dipartisi dengan n-heksana dan kloroform sehingga diperoleh ekstrak n-heksana, kloroform dan air, selanjutnya ekstrak n-heksana, kloroform, dan air diuji dengan pereaksi Liebermann-Burchard. Hasil uji fitokimia menunjukkan ekstrak kloroform mengandung triterpen. Ekstrak n-heksana dan kloroform selanjutnya diuji aktivitanya terhadap E.coli. Hasil uji aktivitas ekstrak n-heksana dan kloroform terhadap E.coli pada konsentrasi yang diterapkan (15% b/v), tidak menunjukkan aktivitas terhadap E.coli. Pemisahan kromatografi kolom dengan eluen etil asetat : kloroform : n-heksana (4 : 2 : 2) diperoleh lima isolat namun hanya isolat C (Rf 0,58) yang memberikan hasil positif mengandung senyawa triterpen. Hasil uji kemurnian menunjukkan bahwa isolat relatif murni secara KLT. Hasil identifikasi menggunakan spektrofotometer inframerah menunjukkan bahwa isolat diduga mengandung gugus fungsi –OH terikat, CH alifatik, C-H aldehid, C=O, C=C alifatik, dan C-O alkohol, serta memberikan puncak pada panjang gelombang 279,40 nm dengan absorbansi 0,714. Hasil uji isolat terhadap E.coli tidak menunjukkan aktivitas terhadap bakteri E.coli.  
JENIS ASAM LEMAK MINYAK TEMPE BUSUK M. H. Rachmawati; H. Soetjipto; A. Ign A. Ign. Kristijanto
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 (748.055 KB) | DOI: 10.24843/JCHEM.2019.v13.i01.p13

Abstract

Overripe tempe is a food product that used by peoples in Indonesia as a food seasoning. So far, overripe tempe received less attention than fresh tempe and research of overripe tempe is rarely done. The objective of the study is to identify the fatty acid compounds of the fifth day fermentation overripe tempe oil before and after purification . The overripe tempe oil of fifth day fermentation was extracted with soxhletation method using n – hexane solvent, then it was purified. The various fatty acids of overripe tempe oil were analyzed by GC – MS. The purification process was done by using H3PO4 0,2% and NaOH 0,1N. The result of the study showed that before purification the oil was composed of eight compounds are palmitic acid (13,33%), linoleic acid (77,57%), stearic acid (6,15%), and the five chemical components, Dasycarpidan – 1 - methanol, acetate , oleic acid, 9 - Octadecenamide ,Cholestane - 3, 7, 12, 25 - tetrol, tetraacetate, (3?, 5?, 7?, 12?) and 6, 7 – Epoxypregn – 4 – ene -9, 11, 18- triol - 3, 20 - dione, 11, 18 – diacetate have percentage of areas less than 3%. After purification the oil was composed of palmitic acid (12,38% ), linoleic acid (80,35 %), stearic acid (5,84%), and 17 – Octadecynoic acid (1,42 %) .
ANALISIS SENYAWA HALUSINOGEN DALAM MINUMAN MAGIC MUSHROOM (Psilocybin baeocystis) YANG BEREDAR DI KAWASAN KUTA-BALI N. M. Suaniti; O. Ratnayani; S. A. Sari
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (223.776 KB) | DOI: 10.24843/JCHEM.2018.v12.i01.p17

Abstract

Penelitian ini bertujuan mekstraksi senyawa halusinogen dalam magic mushroom yang dilakukan dengan metode SPE (Solid Phase Extraction) menggunakan pelarut methanol dilanjutkan dengan penentuan kandungan senyawanya dengan kromatografi gas-spektrofotometer massa (GC-MS). Hasil analisis dengan GC-MS menghasilkan dua puncak spektrum dengan spektrum dominan yang diidentifikasi sebagai senyawa halusinogen psilosin dengan waktu retensi 20,08 menit dan kelimpahan sebesar 80,53%.
ADSORPSI PENGOTOR MINYAK DAUN CENGKEH OLEH LEMPUNG TERAKTIVASI ASAM P. Suarya
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 (66.652 KB)

Abstract

Preparation, characterization and application of acid activated clays as adsorbents on the purification of clove leavesoil have been conducted. The effects of concentration of acid on the quality of the activated clay and on theadsorption performance of the prepared activated clay were also studied. Characterization of the activated clay wascarried out using gas sorption analyzer and FTIR spectroscopyThe results showed that the spesific surface area of the activated clays increases with increasingconcentration of acid. At the concentration of acid of 0, 0.4, 0.8, 1.2, 1.6, and 2.0 M, the spesific surface areas were48.27; 48.75, 54.31; 65.21; 62.91 and 51.86 m2/g, respectively. From the adsorption test, it was observed that theactivated clay prepared with concentration acid of 1,2 M, showed the best performance. It’s was able to adsorp 284.2mg of impurity and thus purify 40 ml of crude clove leaves oil.
IDENTIFIKASI SENYAWA AKTIF ANTIFEEDANT DARI EKSTRAK DAUN PANGI (Pangium Sp) DAN UJI AKTIVITASNYA TERHADAP ULAT KUBIS (Plutella Xylostella) Ida Bagus Putra Mahardika; Ni Made Puspawati; Ida Ayu Gede Widihati
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 (156.236 KB)

Abstract

Leaves of pangi (Pangium edule) are known to have many benefits, including antifeedant activity. 500 g of pangi leaf powder was extracted by maceration method using n-hexane extract yieled 4.51 g of dark green extract. This extracts showed high antifeedant activity (47.23%) against Plutella Xylostella at a concentration of 0.1% (w / v). Separation of 2 g of n-hexane extract by chromatography column using n-hexane: ethyl acetate: chloroform (6:2,5:1,5) as mobile phase and silica gel 60 as stationary phase produced 6 groups of fractions.  Fractions 3 reveiled the highest antifeedant activity that is 52.15%, 69.88%, and 91.66% respectively at a concentration of 10 ppm, 100 ppm, and 1000 ppm. This active fraction which was considered relatively pure following purity test on TLC was then identified using GC-MS spectrometre. GC-MS spectra of antifeedant active compound contained at least 11 compounds with 8 compounds successfully identified as ? – pinene, benzene trimethyl, acetic acid triflouro-tetradecyl ester, nonadecene, 13-Hexyloxacyclotridec-10-en-2-one, phytol, 3-eicosene, , benzenedicarboxylic acid diisooctyl este.
DIFUSI NATRIUM DIKLOFENAK DALAM GEL METHOCEL 400 PADA BERBAGAI pH Ketut Widyani Astuti; Yeyet C. Sumirtapura; Ni Nyoman Wiwik S.
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 (148.196 KB)

Abstract

Diffusion of sodium diclofenac in Methocel 400 gel at various pH has been studied. Diffusion test was performed in diffusion cells with artificial membranes of Whatman no.1 filter paper which was immersed in Spangler solution. Measurement of active ingredient concentration that diffuses was performed using UV spectrophotometer at a wavelength of 277 nm.The results showed that highest diffusion of diclofenac sodium occured at pH 7 with a mean percentage of diclofenac sodium diffuses after 240 minutes of 56,88 + 13,70%. The mean percentage of diclofenac sodium which diffuses from the gel Methocel 400 at pH 6 after 240 minutes was 30,39 + 1,08% while that from the Methocel 400 gel at pH 8 was 46,84 + 6,24%.
DISTRIBUSI LOGAM BERAT Pb DAN Cu PADA AIR LAUT, SEDIMEN, DAN RUMPUT LAUT DI PERAIRAN PANTAI PANDAWA I Made Siaka; I Gusti Ayu Made Dwi Adhi Suastuti; I Putu Bagus Mahendra
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 (250.081 KB) | DOI: 10.24843/JCHEM.2016.v10.i02.p04

Abstract

Penelitian mengenai distribusi logam berat Pb dan Cu dalam air laut, sedimen, dan rumput laut di perairan Pantai Pandawa telah dilakukan. Penelitian ini bertujuan untuk mengetahui kandungan total logam berat Pb dan Cu serta distribusinya di perairan Pantai Pandawa. Preparasi pada sampel sedimen dan rumput laut menggunakan metode digesti dengan larutan reverse aqua regia dengan bantuan ultrasonic bath pada suhu 60oC selama 45 menit dan dipanaskan dengan hot plate pada suhu 140oC selama 45 menit. Analisis logam berat Pb dan Cu menggunakan spektrofotometri serapan atom. Hasil analisis terhadap logam berat Pb menunjukan distribusi logam berat Pb dalam air laut, sedimen, dan rumput laut dari masing-masing lokasi pengambilan sampel di perairan Pantai Pandawa berkisar antara 0,8479 sampai 1,9070 mg/L untuk air laut; 17,0833  sampai 76,25 mg/kg untuk sedimen; dan 13,2749 sampai 51,3252 mg/kg untuk rumput laut. Hasil analisis terhadap logam berat Cu menunjukan distribusi logam berat Cu dalam air laut, sedimen, dan rumput laut dari masing-masing lokasi pengambilan sampel di perairan Pantai Pandawa berkisar 0,0015 sampai 0,0054 mg/L untuk air laut; 0,6699 sampai 1,4554 mg/kg untuk sedimen; dan 0,0623  sampai 0,2233 mg/kg untuk rumput laut.  penyebaran dari logam berat Pb dan Cu di perairan Pantai Pandawa menujukan kandungan logam berat Pb dan Cu lebih banyak berada pada sedimen dari pada air laut dan rumput laut. Logam berat Pb dan Cu cenderung terdistribusi lebih banyak pada lokasi yang memiliki intensitas aktivitas yang lebih banyak di perairan Pantai Pandawa.
KARAKTERISTIK DAN SKRINING FITOKIMIA EKSTRAK ETANOL 70% BATANG KEPUH (Sterculia foetida L.) N. P. S. E. Cahyani; J. Susiarni; K. C.S. Dewi; N. L.P. Melyandari; K. W.A. Putra; D. A. Swastini
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 (254.487 KB) | DOI: 10.24843/JCHEM.2019.v13.i01.p04

Abstract

Kepuh (Sterculia foetida L) is a type of kapok plant that has been scientifically proven to have activity as an anti-inflammatory and analgesic. 70% ethanol extract of stem stem is obtained by maceration using 70% ethanol. Examination of the characteristics of 70% ethanol extract of kepuh stem included organoleptic, of moisture content and determination of residual solvent content. Phytochemical screening of 70% ethanol extract of kepuh bark includes: alkaloid, flavonoid, saponin, tannin , polyphenol, and examination of glycosides. The results of the examination of the characteristics of 70% ethanol extract of kepuh stem obtained water content of 8.66 ± 0.748%, the residual content of the solvent had a 0 (zero) ethanol level. The results of phytochemical screening showed 70% ethanol extract of stem stem containing steroid compounds, triterpenoids, flavonoids, saponins, tannins and polyphenols. The identification using UV-Vis spectrophotometry produced ? 212, the absorbance was 1.8601 and ? 284, the absorbance was 0.42186.
OPTIMASI DEASETILASI KHITIN DARI KULIT UDANG DAN CANGKANG KEPITING LIMBAH RESTORAN SEAFOOD MENJADI KHITOSAN MELALUI VARIASI KONSENTRASI NaOH N. M. Puspawati; I N. Simpen
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 (120.363 KB)

Abstract

Chitin resulted from treatment of shrimp and crab shells wasted of seafood restaurant, can be transformedinto chitosan through deacetylation process using concentrated NaOH. This research aims to investigate the optimumcondition of the deacetylation process to achieve a high yield and deacetylation degree of chitosan by varying theconcentration of NaOH while temperature and length of reaction are made constant at 120oC for 4 hours. Theconcentration of NaOH used in this research was 50; 55; and 60%, respectively. All chitosan obtained were purifiedand characterized by FTIR. The deacetylation degree of chitosan was calculated based on FTIR spectra data.The result found, the optimum condition for deacetylation of chitin from shrimp shells at 120oC for 4hours, was achieved using NaOH 60%, giving a high yield of 54.90% and deacetylation degree of 88.04%.. Usingthe same condition as for deacetylation chitin from shrimp, chitosan obtained from crab shells gave a better yieldwhich was 62.76 %, and the deacetylation degree of 88.53%. Both chitosans obtained from shrimp and crab shellssolubled in a 2% acetic acid solution.
AKTIVITAS ANTIOKSIDAN TOTAL FLAVONOID DAN FENOL KULIT BATANG GAYAM (Inocarpus fagiferus Fosb) Sri Rahayu Santi; I Made Sukadana
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 (180.363 KB) | DOI: 10.24843/JCHEM.2015.v09.i02.p04

Abstract

These researchs aim to know of contain total flavonoid, total phenol and antioxidant activity in vitro of gayam stem bark of each extract (Inocarpus fagiferus Fosb). The result of extraction 1 kg stem bark of gayam with 8500 mL ethanol (5 x 1700 mL) to yield 30 g of concentrated extract its brown red. The partition of 15 g concentrated ethanol extract with chloroform, n-buthanol, and water to yields of 1.5g yellowish concentrated chloroform extract,  5.87 g brown red concentrated n-buthanol extract and 5.63 g concentrated water extract respectively. The result of phytochemical test of fourth extract shown that the ethanol, n-buthanol, and water extracts qualitatively contain of flavonoid and phenol compounds, while the chloroform extract only to contain phenol compound with much total flavonoid in ethanol extract 0.14 % and less at n-buthanol extract is 0.09 %. The result of antioxidant activity with DPPH method shown that water and  n-buthanol extract of gayam stem bark have value IC50 was 20 ppm smaller than  IC50 of vitamin E was 25 ppm its mean the water and  n-buthanol extract of gayam stem bark have the highest potent scavenger of free radical. The result of antioxidant activity with lipid peroxide-ammonium thiocyanate method shown the extract n-buthanol extract have the highest potent  inhibition of formed lipid peroxide (63.04%), it is higher than antioxidant activity of vitamin E (50.39%).

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