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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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PENURUNAN ANGKA PEROKSIDA MINYAK KELAPA TRADISIONAL DENGAN ADSORBEN ARANG SEKAM PADI IR 64 YANG DIAKTIFKAN DENGAN KALIUM HIDROKSIDA Sri Wahjuni; Betty Kostradiyanti
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

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Research on IR64 rice shell ash activation with KOH was carried out. Then, this activated ash known asadsorbent was applied to absorb H2O2 solution. This adsorbent was then applied to absorb peroxide number oftraditional coconut oil.The research includes activation of rice ash with 5%, 10%, and 15% KOH, followed by determination ofrate and isotherm adsorption towards H2O2. Finally, the ash was applied to absorb traditional coconut oil, in order todecrease peroxide number of the oil.Research results indicated that, adsorption rate of the ash with KOH activation is higher than without KOHactivation. Adsorption isotherm patern of the ash with and without activation is following Langmuir adsorption. Riceshell ash activated with 15% KOH can increased adsorption capacity of H2O2 about 297.16 mg/g, whereas withoutactivation the adsortion capacity is about 271.66 mg/g. Activated ash with 15% KOH was the applicated to decreaseperoxide number of traditional coconut oil. In this study, we obtain that the ash can decreased peroxide number until84.4%.

UJI SIFAT VIRGIN COCONUT OIL (VCO) HASIL EKSTRAKSI ENZIMATIS TERHADAP BERBAGAI PRODUK MINYAK KELAPA HASIL PUBLIKASI Ni M. Suaniti; Manuntun Manurung; Nadya Hartasiwi
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

A complete mixture of waste unripe peels and leaves derived from papaya (Carica papaya) can be used to obtain enzymatic VCO. Enzymatic VCO has been generated and investigated by several detailed determination. Chemical and physical properties characterization of VCO in this process obtained density then viscosity at temperature 40?C achieved value 909,3 kg/m3 and 26,2094 mm2/s (40?C), whereas physical appearance seen as greenish yellow color, natural fresh coconut scent, free from rancid odor and taste. Iodine value, saponification value, ester value, and % FFA about 5,1601 g Iodine/100 g oil; 271,0596 mg-KOH/g oil; 271,2286 mg-KOH/g oil; 0,1725 %. Degree of VCO purity analyzed by use of TLC separation each for eluent 1 or 2 derived around 0,67 and 0,71, in other experiment standard Rf value for methyl laurate attained 0,74.

KANDUNGAN SENYAWA STEROID-ALKALOID PADA EKSTRAK n-HEKSANA DAUN BERINGIN (Ficus benjamina L) I Made Sukadana
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

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Isolation of steroid-alkaloid compounds from Banyan leaf (Ficus benjamina L.) has been carried out. As much as 27.13 g of concentrated ethanol extract was resulted from 1.0 kg dried powders of Banyan leaf that was macerated using ethanol as a solvent. Further, this extract was partitioned with n-hexane to obtain 11.39 g concentrated extract of n-hexane. Ethanol extract was dissolved in ethanol-water (7:3), then was evaporated leaving water extract. Futhermore these water extract was partitioned with chloroform to obtain 0.7 g concentrated chloroform extract which was dark green and 2.21 g concentrated water extract which was green.Separations of n-hexane extract containing steroids using column chromatography (stationary phase : silica gel 60 and mobile phase : chloroform-ethylacetate (4:1)) resulted in fourteen fractions with F8 fraction being the most positive toward Liebermann-Burchard reagent, but this fraction contains at least in five components. Purification of the F8 fraction using TLC preparative resulted in six fractions (F8.1, F8.2, F8.3, F8.4, and F8.5) with F8.1 fraction being the most active steroid.The infrared spectrophotometer analysis suggested that the isolate (F8.1 fraction) was a steroid-alkaloid compound having functional groups including O-H stretching at 3448.72 cm-1 that was supported by one band C-OH streching at 1381.03 cm-1, the band of C-H aldehyde group at 2924.09 and 2854.65 cm-1 and the carbonyl group C=O of aldehyde at 1735.9 cm-1. Absorption at 2337.72 cm-1 indicated C?N stretching which was supported by N-H aliphatic and C-N aliphatic groups at 1172.72 and 1111.00 cm-1 respectively. The other groups were C=C aliphatic (1558.48 cm-1), C-H aliphatic bending (1458.18 cm-1), and C-O-C stretching (1257.59 cm-1). The gas chromatogram and mass spectra showed an isomer compound with Mr of 393 and molecular formula of C24H27O4N which was an alkaloide.

ISOLASI DAN IDENTIFIKASI SENYAWA MINYAK ATSIRI DARI TUMBUHAN SEMBUKAN (Paederia foetida L.) DENGAN METODE KROMATOGRAFI GAS-SPEKTROSKOPI MASSA (GC-MS) Dewa Gde Agung Yuda Pratama; I Gusti Agung Gede Bawa; I Wayan Gede Gunawan
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

Sembukan is a wild plant that is often attached to the house fenced and has a lot of chemicals compound, including essential oil. This study aims to determine the active compounds as antibacterial of sembukan essential oil. One point four mililitres of essential oil was obtained by steam distillation. The essential oils were then tested for antibacterial activity against Escherichia coli and Stapylococcus aureus using the well diffusion method in gel. Identification of the essential oils conducted using Chromatography Gas – Mass Spectroscopy (GC-MS). The results of this study indicated that the essential oils did not have specific antibacterial activity against the bacteria tested. Compounds contained in the essential oils of sembukan were hydrogenated Linalool, Eugenol, Tetradecane, Heksadecane, and Dibutyl phthalate.

UJI PENDAHULUAN TOKSISITAS AKUT DERMAL SEDIAAN SALEP EKSTRAK ETANOL 70% DAUN BINAHONG (ANREDERA SCANDENS (L.) MOQ.) TERSTANDAR P. O. Samirana; D. M. N. Pratiwi; N.W. Musdwiyuni; D. A. A. Andhini; A. N. Mahendra; 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

Daun binahong (Anredera scandens (L.) Moq.) telah banyak diteliti aktivitas farmakologisnya dan sudah dilakukan standarisasi oleh Farmakope Herbal Indonesia, sehingga mudah dikembangkan menjadi obat herbal terstandar. Ekstrak etanol 70% daun A. scandens (L.) Moq.berpotensi sebagai sediaan dalam menyembuhkan luka terutama luka eksisi. Uji pendahuluan toksisitas akut dermal bertujuan untuk ada atau tidaknya kematian hewan uji setelah diberikan sediaan salep ekstrak etanol 70% daun A. scandens (L.)Moq.secara topikal agar memenuhi persyaratan menjadi obat herbal terstandar.Penelitian secara eksperimental ini digunakan tikus putih betina galur Wistar sebanyak 8 ekor yang terdiri dari 1 ekor tikus telah di aklimatisasi selama 1 minggu.Objek uji dibagi dalam kelompok kontrol normal, uji basis salep, dan tujuh kelompok perlakuan (diberikan olesan basis salep ekstrak etanol 70% daun A. scandens (L.) Moq.dosis 1000 mg/KgBB, 2000 mg/KgBB, dan 5000 mg/KgBB). Hasil pengamatan menunjukkan bahwa pemberian sediaan salep ekstrak etanol 70% daun A.scandens (L.) Moq.tidakmenyebabkan adanya tikus yang mati dengan pengamatan selama 14 hari, sehingga ekstrak etanol 70% daun A.scandens (L.) Moq.telah memenuhi standar menurut Farmakope Herbal Indonesia dilihat dari parameter rendemen ekstrak, kadar air ekstrak, kadar abu total, kadar abu tidak larut asam, dan kadar flavonoid total. Kata kunci: Anredera scandens, sediaan salep, luka eksisi, toksisitas akut dermal

BIOSORPSI KROMIUM(VI) PADA SERAT SABUT KELAPA HIJAU (Cocos nucifera) I Wayan Sudiarta; Dwi Ariani Yulihastuti
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

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Studies on biosorption of chromium (VI) on green coconut coir fibre (Cocos nucifera) biosorbent have beencarried out. These studies included determination of biosorben acidity, optimum pH, contact time of biosorption,isoterm and biosorption capacity, and interaction type between chromium (VI) and green coconut coir fibre (Cocosnucifera) biosorben Mechanisms of interaction were determined through study on desorption chromium (VI) of thepreviously adsorbed using aquadest, 1 M HCl and 0,05 M Na2EDTA.The result showed that the total acidity of green coconut coir fibre biosorbent was 8,7158 ± 0,2569 mmol/g,the optimum pH was 2, and the contact time was 120 minute. Biosorption capacity of green coconut coir fibre (Cocosnucifera) to chromium (VI) was 12,6152 mg/g. Interaction type that occurred between chromium (VI) ion and greencoconut coir fibre biosorben (Cocos nucifera) were hydrogen bond, Van der Walls bond, cation exchange andcomplex bond.

PEMBERIAN EKSTRAK DAUN SIRSAK (Annona muricuta) UNTUK MEMPERBAIKI KERUSAKAN SEL BETA PANKREAS MELALUI PENURUNAN KADAR GLUKOSA DARAH, ADVANCED GLYCATION AND PRODUCT DAN 8-HIDROKSI-2-DIOKSIGUANOSIN PADA TIKUS WISTAR HIPERGLIKEMIA Ni G. A. M. Dwi Adhi Suastuti; I G. A. Kunti Sri Panca Dewi; Ni Komang Ariati
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

This research aimed to determine the effectivity of soursop leaf extract to repair beta pancreatic cells damaged in Wistar rats induced by alloxan. This experiment used randomized posttest-only control group design. In this experiment, 24 Wistar rats were used which divided into four groups, control group (K), and three treatment groups (P). P1 was the group tretment with a dose of 50 mg/kg bw/day, P2 with a dose of 100 mg/kg bw/day, and P3 was the group treatment with a dose of 150 mg/kg bw/day extract. All groups were induced by alloxan with a dose of 150 mg/kg bw to obtain condition of hyperglycemia. The results showed that blood glucose levels decreased after treatment with the extracts. Glucose levels in group K, P1, P2, and P3 were 208.0 mg/dL; 177.5mg/dL; 164.7 mg/L and 137.0 mg/dL respectively. After 2 weeks of treatment, the level of 8-OHdG and AGEs were also reduced. The lowest level was observed in P3 treatment which the level of 8-OHdG 1.664ng.mL and 0.033 mol/L for AGEs level. In conclusion the soursop leaf (Annona muricata) extract given at a dose of 150 mg/kg bw/day can improve beta pancreatic cells resulted from antioxidant activity content in the extract which function as antihyperglycemia. Based on GC-MS spectra analysis, the the soursop leaf (Annona muricata) extract consisted of caryophyllene, ethyl tetradekanoat, acid 2-cyclohexane-1-one, 4-hydroxy-3,5,6-trimethyl-4-(3-oxo-1-butenyl), hexa ethyl decanoate , phytol, thiazole-2,4 (3H, 5H) _dion, 5 benzilideno-3 [etifenilamino) metal], 9-octadecanoic acid, ethyl linoteat, ethyl oleate and ethyl octadecanoic.

ADSORPSI KATION Pb(II) DAN Cr(III) OLEH BATU PADAS JENIS LADGESTONE TERAKTIVASI H2SO4 DAN NaOH Novita Rambu Atandawu; Ida Ayu Gede Widihati; I Wayan Suarsa
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

Adsorption of Pb (II) and Cr (III) cations by ladgestone activated with 2 N sulfuric acid, and 4 N sodium hydroxide have been studied. The activation aims to increase the adsorption capacity of the ladgestone which was characterized by measuring its specific surface area and the acidity of the ladgestone surface. In addition, equilibrium adsorption time, isotherm adsorption, and the adsorption capacity were also determined using atomic absorption spectrophotometry (AAS). The results showed that activation with 2 N sulfuric acid increased the acidity of ladgestone surface but it decreased the specific surface area, while activation with 4 N sodium hydroxide increased both the acidity and the specific surface area of the ladgestone. Hence, ladgestone activated with 4 N sodium hydroxide gave the highest adsorption capacity both for Pb (II) and Cr (III) which were 12.4976 mg/g and 12.4945 mg/g respectively.

ADSORPSI ION Pb2+ OLEH LEMPUNG TERINTERKALASI SURFAKTAN I. A. Gede Widihati
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

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Intercalation of Bentonit clay with quaternary ammonium salt, N-cetyl, N,N,N –trimethyl ammoniumbromide in the presence of palmitic acid was investigated in this research. The aim was to improve the capacity ofBentonit clay as adsorbent for lead ion (Pb2+). The salt used has a capacity of 8 mmol/10kg clay, which equal to itscapacity as cation exchanged. After intercalating process, palmitic acid was added and then clay was ready to beused as adsorbent for lead ion (Pb2+).Characterisation of physical chemistry properties of the intercalated Bentonit clay was performed using Xraydiffractometer for basal spacing distance between interlayer Bentonit clay, infra red spectrometer for Brownsteadacid site, and atomic adsorption spectroscopy to determine the capacity of adsorption by analyzing isothermadsorption and equilibrium temperature data.It was found that the intercalation of Bentonit clay with quaternary ammonium salt, N-cetyl, N,N,N –trimethyl ammonium bromide increased the distance between interlayer Bentonit clay (basal spacing from 15.9236Ao to 21.0554 Ao. The infra red spectra data revealed the appearance of Brownstead acid site at n 1419.5 cm-1. Theresult also found that the capacity of Bentonit clay as adsorbent for lead ion (Pb2+) improved from 1.9565 mg/gbefore intercalation to 4.0263 mg/g (after intercalation process).

KAPASITAS ANTIOKSIDAN SENYAWA GOLONGAN TRITERPENOID PADA DAUN PRANAJIWA (Euchresta horsfieldii lesch benn) Kadek Ayu Intan Sari; I Wayan Gede Gunawan; Ketut Gede Dharma Putra
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

Isolation, identification, and anti-oxidant assay of triterpenoid compound from Euchresta horsfieldii lesch benn) have been conducted. Maseration of 600 g pranajiwa leaves powder with n-hexane produced 6,1 g n-hexane extract which gave yellow to purple colour change with Lieberman-Burchard reagent. The separation with column chromatography using silica gel 60 obtained 3 fractions (F1, F2, F3) which were then analyzed with triterpenoid test. The positive fraction of triterpenoid (F1) produced 2 g yellow isolate. Infrared spectra indicated that the isolate was a triterpenoid, with characteristic functional groups of OH, –CH, C=O, –C=C, –CH2, –CH3, and C–O alcohol. Ultraviolet-visible spectra showed broad peak at 217 nm. The result of anti-oxidant capacity test of triterpenoid was 94,67%, showing that triterpenoid from pranajiwa leaves can be use as an anti-oxidant.

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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

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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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