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Jurnal Kimia (Journal of Chemistry)

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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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KADAR AIR DAN BILANGAN ASAM DARI MINYAK KELAPA YANG DIBUAT DENGAN CARA TRADISIONAL DAN FERMENTASI N. G. A. M. Dwi Adhi Suastuti
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 2 Juli 2009
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 (94.22 KB)

The water contents and acid numbers of coconut oils made by thad way and by fermentation werecompared. The water contents were determined using oven method while the acid numbers was cletermined bytitration. Both parameters were compared on oils exposed to open air for 0, 1, 2, 3, and 4 weeks.Result showed that water contents and acid value of coconut oils produced by fermentation process werehigher than coconut oils made by traditional ways. Water content of coconut oil made by traditional way and byfermentation were elevated during exposure. The highest water content of both coconut oils made by traditional wayand fermentation process after 4 weeks exposure were 0,03 % and 0,06 % respectively, while the highest acidnumbers of both coconut oils products after 4 weeks exposure were 0,75 and 0,89 mg KOH/g respectively

PERBANDINGAN AKTIVITAS SPESIFIK EKSTRAK KASAR ENZIM BROMELIN BUAH NANAS YANG DIISOLASI DENGAN BEBERAPA JENIS GARAM PENGENDAP I. A. Preharsini Kusuma; A. A. I. A. M. Laksmiwati; Made Arsa; Ketut Ratnayani
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

The aim of this research was to find specific activity of bromelain enzyme extracted from crude extract of pineapple fruit (Queen variety) by salting out method using three different salts, which were (NH4)2SO4, NaCl, and Kusamba traditional salt. Crude extract of bromelain enzyme was obtained by precipitation method using salt with different levels of saturation. This study included determination of total protein concentration by using Biuret method and protease activity by using Anson method to get the specific activities of the crude extract. The results showed that the highest specific activities of bromelain enzymes precipitated with the three salts (NH4)2SO4, NaCl and Kusamba traditional salt with the ratio of 1: 0.94: 0.56 were 0.2887 U/mg (at 20% saturation) ; 0.2705 U/mg (at 40% saturation) and 0.1623 U/mg (at 80% saturation). Fractination of enzyme with the NaCl and Kusamba traditional salt gave smaller specific activity value than (NH4)2SO4. This results may caused of NaCl had smaller ionic strength, the presence of other ions in Kusamba traditional salt and the different solubility of bromelain enzyme in different salts. However, due to the ratio of NaCl approached (NH4)2SO4 and the availability of Kusamba traditional salt they could be used as alternative salts to replace (NH4)2SO4 in fractination bromelain enzyme from crude extract of pineapple fruit

SINTESIS SILIKA GEL DARI ABU SEKAM PADI DAN ABU LIMBAH PEMBAKARAN BATU-BATA DENGAN METODE PRESIPITASI Isnawan Hadi; Made Arsa; I Wayan Sudiarta
Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

Studies on synthesis of silica gel from rice hull and waste ofcombustion ash with prepitatian method have been. The studies was with the determination of the optimum temperature incineration of rice husk, the determination of the optimum concentration of NaOH in the manufacture of Sodium Silicate solution from rice hush and brick ash. Synthetic silica gel was obtained by boiling the ash with NaOH solution to create sodium silicate. This solution was neutralized with sulfuric acid and silica gel was produced. After washing and drying the silica gel was analyzed by spectrophotometer IR and X-ray Diffractometer. The result showed that the optimum incineration temperature of rice husk was 700oC, the optimum concentration of NaOH was 3M. Based on the characterization by IR, silica gel has been successfully created, marked by the absorption indicating and silianol of functional groups –OH at 3456,44-3487,30 cm-1and Si-O-Si or siloxane at 1103,28-1087,85 cm-1and X-RD analysis showed that silica gel formed was amorphous form.

AKTIVITAS ANTIPIRETIK EKSTRAK ETANOL KULIT BUAH RAMBUTAN (Nephelium lappaceum L) SECARA IN VIVO DAN KANDUNGAN FENOLIK TOTALNYA I Made Dira Swantara; Riski Fatur Rachman; Ni Made Puspawati
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

Penelitian ini bertujuan untuk mengetahui efek antipiretik ekstrak etanol kulit buah rambutan dan menentukan kandungan fenolik totalnya. Metode untuk uji aktivitas antipiretik dilakukan secara invivo menggunakan ragi tape untuk menginduksi demam pada tikus jantan galur Wistar dan menggunakan metode Folin-Coicalteu untuk mengukur total fenolnya. Hasil skrining fitokimia menunjukkan adanya senyawa golongan fenolik, tanin, flavonoid, saponin, dan terpenoid, dengan kandungan senyawa fenoliknya yang lebih dominan. Hasil penelitian menunjukkan pemberian ekstrak etanol kulit buah rambutan pada dosis 5; 10 dan 20 mg/100 g BB bersifat antipiretik dengan terjadinya penurunan suhu rectal tikus dibandingkan dengan kontrol negatif dan penurunan suhu yang tajam terlihat pada menit ke-210 setelah pemberian ekstrak. Kandungan fenol total dalam ekstrak etanol kulit buah rambutan yang diperoleh sebesar 39,7861 g GAE/100 g atau 39,78%.

MOLECULAR DOCKING TERPINEN-4-OL SEBAGAI ANTIINFLAMASI PADA ATEROSKLEROSIS SECARA IN SILICO N. M. P. Susanti; N. P. L. Laksmiani; N. K. M. Noviyanti; K. M. Arianti; I K. Duantara
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

Atherosclerosis is a chronic inflammatory disease that begins with endothelial dysfunction, it caused fat accumulation and plaque growth in the inner arteries walls. Endothelial dysfunction will activate the Mitogen Activated Protein Kinase (MAPK) pathway involving ERK1, ERK2, JNK1, JNK2, and p38MAPK proteins, as well as the Nuclear Factor Kappa B (NF-kB) pathway involving IKK proteins. Terpinen-4-ol is constituent found in the bangle rhizome. The purpose of this study were to determine the affinity and mechanisms of terpinen-4-ol against ERK1, ERK2, JNK1, JNK2, and p38MAPK proteins as anti-inflammatory in atherosclerosis performed using molecular docking method. The study was conducted exploratively with several steps such as preparation and optimization of terpinen-4-ol structure, preparation of 3D ERK1, ERK2, JNK1, JNK2, and p38MAPK proteins, validation method of molecular docking, and docking terpinen-4-ol in these proteins. The docking result are assessed from the binding energy and hydrogen bonds formed between terpinen-4-ol and proteins. The smaller value of binding energy terpinen-4-ol with target proteins showed the complex that form more stable. The result showed that terpinen-4-ol and has activity in inhibiting the inflammatory process because it is able to disturb ERK1, ERK2, JNK1, JNK2, and p38MAPK proteins with respective bond energy values -5,12; -5,24; -5,08; -5,88; and -4,99 Kcal/mol. The molecular mechanism in inhibiting the activity of ERK1, ERK2, JNK1, JNK2, and p38MAPK proteins is through the formation of hydrogen bonds in these proteins. These results show that terpinen-4-ol have the potential to inhibit inflammatory process and the formation of atherosclerotic plaque can be obstructed. Keywords : atherosclerosis, terpinen-4-ol, molecular docking, in silico

ISOLASI DAN IDENTIFIKASI SENYAWA GOLONGAN TRITERPENOID DARI EKSTRAK n- EKSANA DAUN KEPUH (Sterculia foetida L.) SERTA UJI AKTIVITAS ANTIRADIKAL BEBAS I. A. R. Astiti Asih; I W. G. Gunawan; N. M. Desi Ariani
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 (88.943 KB)

Kepuh leaves can be used as traditional medicine to cure various diseases. Maseration of ± 1000 g drypowder of Kepuh leaves with n-hexane as the solvent resulted in 2,10 g n-hexane concentrated extract. Separation ofthis extract with column chromatography gained two yellow amorphous crystal isolates of F3.1 and F3.2 with 0,0195 gand 0,0032 g in weight, respectively.The result of phytochemical test of isolate F3.1 with Liebermann-Burchard reagent showed that the isolatepositively contained triterpenoid. Identification of isolate F3.1 with spectrophotometer UV-Vis showed one broadpeak at 265 nm. The transition occured probably was n *, that was caused by C=O chromophor. Infraredspectrum showed characteristic groups of OH at 3294,42 cm-1, aliphatic CH at 2924,09 cm-1 and 2854,65 cm-1, C=Oat 1743,65 cm-1, bending CH2 and bending CH3 at 1458,18 cm-1 and 1381,03 cm-1 and alcoholic CO at 1172,72 cm-1.Free antiradical activity test against isolate F3.1 was carried out by spectroscopy UV-Vis method. Isolate F3.1 hadcharacteristic as a free antiradical with DPPH damping percentage at the 5th minute was 85,33% and at the 60thminute was 88,52%.According to phytochemical tests and spectrophotometry analysis, isolates from kepuh leaves was expectedto contain true triterpenoid group compounds with free antiradical activity OH group, aliphatic CH, C=O andalcoholic C-O as the functional groups.

UJI EFEKTIVITAS DAN IDENTIFIKASI SENYAWA AKTIF EKSTRAK DAUN SIRSAK SEBAGAI PESTISIDA NABATI TERHADAP MORTALITAS KUTU DAUN PERSIK (Myzus persicae Sulz) PADA TANAMAN CABAI MERAH (Capsipcum annum L.) Ni Made Dwi Desiyanti; I Made Dira Swantara; I Putu Sudiarta
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

The study of isolation and identification of the active compounds of soursop (Annona muricata L.) leave extract were conducted . The metabolite extraction was conducted using maceration method with 96 % ethanol. The ethanol extract was used to test the mortility of aphid (Myzus persicae S.), with LC50 of 100 ppm. The n-hexane, chloroform, and n-buthanol were used to fractionate the ethanol extract. The mortality test of those three extracts showed the LC50 of 545.12 ppm, 136.26 ppm and 117.73 ppm, respectively. The n-butanol extract was separated using silica gel column chromatography with chloroform: ethanol: water (5:4:1), as the mobile phase. The fractions resulted were FI, FII, FIII, FIV and FV. The mortality test indicated that FII was the best with LC50 of 596.48 ppm. The FII was purified using silica gel column chromatography, resulting three fractions (FII.1, FII.2 and FII.3). The mortality test of those fractions indicated that FII.2 showed the best result with LC50 of 601.17 ppm. The UV-Vis and IR spectra showed that FII.2 fraction contained flavonoides under the flavonon family.

SPESIASI DAN BIOAVAILABILITAS LOGAM Cu DAN Zn DALAM SEDIMEN DI PELABUHAN BENOA YANG DIAYAK BASAH DAN KERING Arik Agustina; Emmy Sahara; I G.A. Kunti Sri Panca Dewi
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

This paper discusses the speciation and bioavailability of Cu and Zn in sediments of Benoa Bay during which the sediments were sieved in wet and dry conditions. The objective of the study was to determine the concentrations of Cu and Zn in various geochemical forms, therefore the bioavalabilities of the metals could be determined. The determination of the total concentrations of Cu and Zn in the sediments were carried out by the application of extraction with the mixture of HCl and HNO3 (3:1). The speciations of the metals were accomplished with the sequential extraction procedure. The metals concentration measurements were performed by Atomic Absorption Spectroscopy technique with the calibration curve method. It was found that the total Cu concentrations in sediment sieved in wet and dry conditions were 178.4144 mg/kg and 179.9797 mg/kg, respectively. The speciation results for Cu in sediment sieved in wet and dry conditions were as follow: freely, leachable and exchangeable (EFLE) fraction 0.79 and 0.49%, Fe / Mn-oxide fraction 67.75% and 58.71%; organic and sulfide fractions 24.34% and 34.71%, while resistant fraction 2.89% and 2.82%. Therefore, the bioavalable and resistant fractions of Cu in wet sieved sediment were 92,88 % and 2.89%, respectively, while those of dried sieved were 93,92 % and 2,82%, respectively. The total Zn concentrations in sediment sieved in wet and dry conditions were 195.4015 mg/kg and 196.9482 mg/kg, respectively. The speciation results for Zn in sediment sieved in wet and dry conditions were as follow: EFLE fraction 18.83% and 17.40%, Fe / Mn-oxide fraction 35.86 and 37.65%; organic and sulfide fractions 17.16% and 31.09%, while resistant fraction 5.76% and 4.09%. Therefore, the bioavalable and resistant fractions of Cu in wet sieved sediment were 71.85% and 5.70%, respectively, while those of dried sieved were 86.14% and 4.09%, respectively.

ANTIBACTERIAL TRITERPENOIDS FROM THE BARKS AND LEAVES OF Lansium domesticum Corr cv. Kokossan (MELIACEAE) T. Mayanti; Y. P. Apriantini; S. Soidah; J. Sianturi; D. Darneti; E. Julaeha; D. Sumiarsa; Nurlelasari Nurlelasari; R. Maharani
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

Tiga senyawa triterpenoid, 8,14-sekogamasera-7,14-dien-3,21-dion (1), 8,14-sekogamasera-7-en-14-hidroksi-3,21-dion (2) dan 9,19-siklolanost-24-en-3-on, 21,23 epoksi-21,22-dihidroksi (21R, 22S, 23S) (3) telah diisolasi dari kulit batang dan daun L. domesticum cv kokossan (Meliaceae). Struktur kimia senyawa 1-3 telah ditentukan melalui data spektroskopi UV, IR, NMR dan MS serta perbandingan dengan data spektroskopi laporan sebelumnya. Senyawa 1, 2 dievaluasi sifat antibakterinya terhadap Escherichia coli dan Bacillus cereus. Senyawa 3 dievaluasi sifat antibakterinya terhadap Escherichia coli dan Enterococcus feacalis. Senyawa 1 menunjukkan nilai zona hambat sebesar 7,5 dan 8,0 mm pada konsentrasi berturut-turut 500 dan 1000 ppm terhadap Escherichia coli dan tidak aktif terhadap Bacillus cereus. Senyawa 2 menunjukkan nilai zona hambat sebesar 8,0 dan 10,0 mm pada konsentrasi berturut-turut 500 dan 1000 ppm terhadap Escherichia coli dan tidak aktif terhadap Bacillus cereus. Senyawa 3 menunjukkan nilai zona hambat 3,67 mm, 3,17 mm, 2,32 mm pada konsentrasi berturut-turut 10000, 5000 dan 1000 ppm terhadap E. coli, tidak aktif terhadap E. feacalis.

ISOLASI DAN UJI ANTIRADIKAL BEBAS MINYAK ATSIRI PADA DAUN SIRIH (Piper betle Linn) SECARA SPEKTROSKOPI ULTRA VIOLET-TAMPAK I M. Oka Adi Parwata; Wiwik Susanah Rita; Raditya Yoga
Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 1 Januari 2009
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 (374.04 KB)

Isolation, identification and free radical activities testing of essential oil from Piper betle Linn were carriedout. Around 13,0 mL (12, 37 gram) of yellow essential oil was obtained from 10,0 kg fresh leaves of Piper betleLinn. The oil was then partitioned with MeOH : H2O (7:3), n-hexane and chloroform.Free radical activities testing showed n-hexana fraction was the most active which can reduced 66,27 % ofDPPH for 5 minutes and 89,13 % in 60 minutes. GC-MS analysis revealed that there were 27 peaks. Based on thedata analysis there were only 9 compound, i.e. 4-metil(1-metiletil)-3-sikloheksen-1-ol, 1-metoksi-4(1-propenil)benzene, 4-(2-propenil)fenol/kavicol, 4-alilfenilacetate, Eugenol, Karyofilen, 3-alil-6-metoksifenilasetat, 4-alil-1,2-diasetoksibenzena dan dekahidro-4a-metil-1-metilen-7(1-metiletenil) naftalena.Based on peak’s intensity the oil were dominated by 4 compound i.e. 4-allyl phenyl acetate, 2 methoxy-4-(2 prophenil) fenol/eugenol, 3-allyl-6-methoxy phenyl acetate, 4-(2-prophenyl)-phenol / cavikol.

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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

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+628123640424

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jurnalkimia@unud.ac.id

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

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