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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 491 Documents

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FRAKSINASI DAN IDENTIFIKASI SENYAWA TANIN PADA DAUN BELIMBING WULUH (Averrhoa bilimbi L.) Elok Kamilah Hayati; A. Ghanaim Fasyah; Lailis Sa’adah
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 (99.511 KB)

Fractionation of tannic compound from star fruit leaves was conducted by maseration using acetone : water(7:3), and analytical and preparative thin layer chromatography using a variety of eluents. The isolates obtained wereidentified using UV-Vis and FT-IR Spectrophotometer.The best eluent for both analytical and preparative TLC was found to be n-butanol : water : acetic acid(4:1:5), which gave three isolates with Rf of 0.53, 0.61, and 0.68. The second isolate (Rf = 0.61), showed a maximumabsorption at 331 nm on the UV-Vis spectra. Its IR spectra showed specific absorptions such as OH-assymetricstretch (3372.2 cm-1), aromatic overtone (2071.8 cm-1), and aromatic and benzene stretches at 1625.8 cm-1 and 782.5cm-1 respectively. These spectra suggest that the tannic compound was either flavan pent-3,6,7,4',5'-ol or flavanpent-3,7,8,4',5'-ol.

PEMANFAATAN SILIKAT BENTONIT TERSUSPENSI NaCl, MgCl2, DAN CaCl2 UNTUK ISOLASI DNA METAGENOMIK DARI TANAH HUTAN MANGROVE Luh De Dwi Jayanthi; Ida Ayu Gede Widihati; I Nengah Wirajana
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 study was to compare the isolated metagenomic DNA of mangrove soil in Suwung Kauh Beach, Bali by utilizing suspended bentonite of NaCl, MgCl2 and CaCl2. The metagenomic DNA isolation was performed by directly lysis method from soil with lysis buffer and heat-shock, and then continued by DNA extraction with suspended bentonite of NaCl, MgCl2 and CaCl2. Preparation of suspended bentonite was done in 1 M NaCl, MgCl2 and CaCl2. The results of metagenomic DNA isolation were analysed by gel agarose electrophoresis and spectrophotometer Nano at wave length 230, 260, and 280 nm. The results of gel agarose electrophoresis showed that DNA was not detected in the first elution from all suspended bentonite, but DNA was only detected in the first supernatant before elution from Na-bentonite and Mg-bentonite suspended. The DNA bands were most thick in the supernatant before the elution of Na-bentonite. This result indicated that Na-bentonite adsorption to metagenomic DNA was lower than the other bentonite suspended. The DNA band was not detected in the first supernatant and the first elution from Ca-bentonite that indicated that DNA adsorption was stronger than the other and was not breakable from this suspended. The results of spectrophotometer nano showed that the metagenomic DNA isolated by suspended bentonite of NaCl, MgCl2 and CaCl2 were contaminated by humic acid and protein.

ISOLASI DAN IDENTIFIKASI SENYAWA TOKSIK PADA EKSTRAK METANOL DAUN GAHARU (Gyrinops versteegii) I Nyoman Mika Adi Santosa; Ida Ayu Raka Astiti Asih; A. A. I. A. Mayun Laksmiwati
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

Isolation and identification of toxic compound from methanol extract of eaglewood leaves (Gyrinops versteegii) has been done. Extraction of 869 g of dried eaglewood leaves powder produced concentrated extracts of n-hexane (21.56 g) and methanol (81.85 g). The result of toxicity test for both of concentrated extracts showed methanol extract was the most toxic with LC50 of 39.81 ppm. Partition of methanol extract gained three concentrated extracts in chloroform (2.74 g) , ethyl acetate (3.44 g) and water (15.56 g). The result of toxicity test showed chloroform extract was the most toxic with LC50 of 23.44 ppm. Chloroform extract was then separated and purified by chromatography technique and obtained three toxic fractions namely fraction of A (0.44 g), B (0.22 g) and C (0.13 g). The toxicity test showed that fraction C was the most toxic with LC50 of 34.67 ppm. The phytochemical test result showed that fraction C was belong to triterpene groups. Analysis using UV-Vis spectrophotometer gained 2 peaks at ? 245 nm and ? 416 nm, showing the possibility of the chromophore C=O and C=C, respectively. Analysis using infrared spectrophotometer showed the characteristic absorption of an -OH group, aliphatic CH, C=O and C=C on wave numbers of cm-1 3441.01; 2924.09 (-CH3) and 2854.65 (-CH2); 1743.65; and 1627.92, respectively. According to phytochemical test and spectrophotometry analysis, the isolate of fraction C was supposed to contain triterpene group compounds which has functional groups of OH, aliphatic CH, C=O and C=C.

OPTIMASI PEMBUATAN NANOEMULSI VIRGIN COCONUT OIL N. M. D. Listyorini; N. L. P. D. Wijayanti; K. Widnyani Astuti
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

Penelitian ini mempelajari optimasi pembuatan nanoemulsi menggunakan virgin coconut oil (VCO) yang bertujuan untuk memperoleh perbandingan minyak (VCO), surfaktan dan kosurfaktan yang dapat membentuk nanoemulsi yang memenuhi persyaratan menggunakan Self Nano-Emulsifying Drug Delivery System (SNEDDS). Metode yang digunakan adalah Spontaneous Emulsification yang termasuk ke dalam SNEDDS. Perbandingan yang digunakan dalam nanoemulsi yaitu minyak (VCO): surfaktan (Cremophor RH40 atau Tween 20): kosurfaktan (PEG 400 atau etanol): fase air (akua deion) dengan perbandingan (1:8:1):5, (1:7:2):5 dan (2:7:1):5 yang menghasilkan 12 buah formula. Dilakukan uji evaluasi berupa uji stabilitas isik dan persen transmitan ke-12 formula. Diperoleh 2 formula yang dilanjutkan untuk uji zeta potensial dan ukuran partikel yaitu F2 dan F7. Uji zeta potensial F2 (0,14 mV) dan F7 (0,48 mV) serta uji ukuran partikel F2 (20,8 nm) dan F7 (20,6 nm). Berdasarkan hasil uji evaluasi yang dilakukan maka diperoleh dua formula yaitu F2 (VCO: Cremophor RH40: PEG 400 (1: 8:1)) dan F7 (VCO: Cremophor RH40: Etanol (1: 7: 2)) yang sesuai persyaratan untuk menghasilkan nanoemulsi yang baik.

SYNTHESIS AND CHARACTERIZATION OF PHOTOCATALYS Fe2O3 PILLARED MONTMORILLONITE DOPED TiO2 AND ITS APPLICATION FOR RHODAMINE B PHODODEGRADATION USING VISIBLE LIGHT IRRADIATION D. A. D. N. Dewi; I N. Simpen; I W. Suarsa
Jurnal Kimia (Journal of Chemistry) Vol.14 No.1 Januari 2020
Publisher : Program Studi Kimia, FMIPA, Universitas Udayana (Program of Study in Chemistry, Faculty of Mathematics and Natural Sciences, Udayana University), Bali, Indonesia

A montmorillonite clay modified with semiconductor metal can act as a photocatalyst material. Montmorillonite clays were chosen because of their natural characteristics which are easily to be modified and have high specific surface area. This research aims to modify montmorillonite clay into photocatalyst material. The montmorillonite clay was intercalated using Fe2O3 to produce Fe2O3-pillared montmorillonite clay, then doped with TiO2 to form a photocatalyst material Fe2O3-PILC / TiO2. Modifications were intended to increase the specific surface area and number of active photocatalyst sites and thus increase the ability of photodegradation. The characterization carried out included characterizing the pillar formation using X-ray Diffraction (XRD), specific surface area by the BET method (Bruneau, Emmet, and Teller), a the number of surface acid-base sites by the titration method. Photocatalyst with the best character was Fe2O3-PILC / TiO2 1: 3 with specific surface area, number of acid and base sites respectively 45,947 m2/g, 20,1736 x 1023 sites/gram and 19,0044 x 1023 sites/gram. The result of photodegradation at optimum condition with visible light at pH 3 using 400 mg photocatalyst was 99.84%. Keywords: photocatalyst, Fe2O3, montmorillonite clay, TiO2, rhodamine B

KORELASI ANTARA KEDALAMAN SEDIMEN DI PELABUHAN BENOA DAN KONSENTRASI LOGAM BERAT Pb DAN Cu I M. Siaka
Jurnal Kimia (Journal of Chemistry) Vol. 2, No. 2 Juli 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 (1454.049 KB)

An investigation on the correlation between the depth of sediment in Benoa estuary and the concentration ofPb and Cu. Statistically, the sample collecting location and the sediment depth influenced the concentration of lead(Pb) and copper (Cu) significantly. The variation resources of interaction between sample collecting location and thesediment depth also showed a great influence. In general, the deeper the sediments, the lower the concentration of Pband Cu are. The average concentrations of heavy metals found in surface layer (0 cm) were 15.52 mg/kg of Pb and35.85 mg/kg of Cu. Sediment in the depth of 10 cm contained 13.49 mg/kg of Pb and 33.69 mg/kg of Cu, while thesediment in the depth of 20 cm contained 11.51 mg/kg of Pb and 32.22 mg/kg of Cu.

IDENTIFIKASI DAN UJI AKTIVITAS SENYAWA TANIN DARI EKSTRAK DAUN TREMBESI (Samanea saman (Jacq.) Merr) SEBAGAI ANTIBAKTERI Escherichia coli (E. coli) Putu Puspita Sari; Wiwik Susanah Rita; Ni Made Puspawati
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 and identification of tannin compounds from trembesi leaves (Samanea saman (Jacq.) Merr) and its anti-bacterial activity test against Escherichia coli (E. coli) have been done in this research based on the utilization of trembesi leaves to treat diarrhea. Extraction was done by maceration and partition, separation by preparative TLC. The anti-bacterial activity was tested using wells that diffusion method, and the identification of the compounds was done with UV-vis spectrophotometer and FTIR. Maceration with ethanol produced 36.80 g crude ethanol extract. Phytochemical test showed that acetone and water fractions gave positive result for hydrolyzed tannin compounds but acetone fraction revealed more concentrated than water fraction. Anti-bacterial test result showed that the acetone fraction was active towards E.coli with medium activity. Separation of the eluent n-butanol: acetic acid: water (4:1:5) (BAA) gave six isolates but only two isolates (isolate 2 with Rf 0.61, and isolates 3 with Rf.0.65) gave positive results for tannin. These two isolates were relatively pure on TLC purity test and showed weaker anti-bacterial activity compared to the acetone fractions. Identification using UV-Vis spectrophotometer showed that isolates 2 and 3 gave two similar peaks with maximum absorbance at 346.50 nm and 347.00 nm respectively due to n?*and ??* electron transitions, which indicated the presence of C=O and C=C chromophores. Infrared spectra of isolates 2 and 3 revealed peaks that correspond to characteristic functional groups of tannin including –O-H, C-H aliphatic, C=O esther, C=C aromatic, C-O-H, and C-O-C ether.

SINTESIS DAN KARAKTERISASI SENYAWA OKSOTRINUKLIR [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) Aldes Lesbani; Risfidian Mohadi; Nurlisa Hidayati
Jurnal Kimia (Journal of Chemistry) Vol. 6, No. 2 Juli 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 (220.583 KB)

The oxotrinuclear compound [Ru2Co(O)(OOCCH3)6(C5H5N)3](ClO4) has been synthesized using RuCl3?nH2O at room temperature under oxygen atmospheric condition. The oxotrinuclear complex was characterized by FT-IR spectrophotometer and mass spectrometer with cold spray ionization (CSI) method. The FT-IR spectra of the resulted oxotrinuclear compound show has specific vibration at 692 cm-1. This absorption is related to M3O vibration (M= metal). CSI-mass spectra of the oxotrinuclear compound show that pyridine as ligand was fragmented in oxotrinuclear compound.

ISOLASI SENYAWA GOLONGAN TRITERPENOID DAN UJI TOKSISITAS EKSTRAK ETANOL BATANG PRANAJIWA (Euchresta horsfieldii (Lesch) Benn) TERHADAP LARVA UDANG (Artemia salina Leach) I Wayan Gede Gunawan; Oka Ratnayani; I Putu Gede Suwindra Putra
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

Isolasi dan identifikasi senyawa toksik berpotensi sebagai antikanker dari batang pranajiwa (Euchresta horsfieldii (Lesch) Benn) telah dilakukan pada penelitian ini. Sebanyak 800 g sampel batang pranajiwa diekstraksi dengan 5000 mL etanol 96% menghasilkan 40,19 g ekstrak pekat etanol, dan hasil uji toksisitasnya terhadap larva udang Artemia salina Leach menunjukan LC50 79,43 ppm. Partisi ekstrak etanol dengan n-heksana, kloroform, dan air menghasilkan 1,50 g ekstrak n-heksana (LC50 50,11 ppm), 1,20 g ekstrak kloroform (LC50 630,95 ppm), dan 30,06 g ekstrak air (LC50 158,48 ppm). Ekstrak n-heksana bersifat paling toksik selanjutnya dipisahkan, dimurnikan, dan diidentifikasi. Pemisahan ekstrak n-heksana secara kromatografi kolom dengan fase diam dan fase gerak n-heksana-kloroform (5:5) menghasilkan empat fraksi (F1-F4). Fraksi F1 dengan noda tunggal pada kromatografi lapis tipis bersifat paling toksik (LC50=79,43 ppm). Hasil identifikasi fraksi F1 dengan uji fitokimia, spektrofotometer UV-Vis, dan FTIR, diduga F1 positif mengandung senyawa golongan triterpenoid.

STUDI ADSORPSI ZAT WARNA NAPHTHOL YELLOW S PADA LIMBAH CAIR MENGGUNAKAN KARBON AKTIF DARI AMPAS TEBU W. P. Utomo; E. Santoso; G. Yuhaneka; A. I. Triantini; M. R. Fatqi; M. F. Huda; N. Nurfitria
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

The aim of this research is to get activated carbon from sugarcane bagasse with high adsorption capacity to Naphthol Yellow S and to know factors influencing the adsorption capacity. Activated carbon is prepared by incomplete combustion of sugracane bagasse. The resulting carbon is activated with H2SO4 with concentration variation of 0.5; 1.0; 1.5 and 2.0 M and is continued by calcination at 400 °C. The measurement of the surface area of ??activated carbon by the methylene blue method indicates that the activation process successfully extends the surface area of carbon from 31.87 m2/g before activation to 66-72 m2/g after activation. Activated carbon with concentration of 2.0 M H2SO4 showed the highest surface area of ??71.85 m2/g, however, the best adsorption was shown by activated carbon with a concentration of 0.5 M H2SO4 with the adsorption capacity of 83.93%. The adsorption test showed that the best amount of adsorbent was 0.2 g with contact time for 30 minutes. Prolonged contact time can decrease the amount of Naphthol Yellow S adsorbed. The best adsorption test result was shown by sample with activator concentration of 0,5 M, mass of 0,2 g and contact time of 30 min with adsorption capacity 95,81% or amount of dye adsorbed equal to 143,72 mg/g. The adsorption study also showed that the entire Naphthol Yellow S adsorption process followed the Langmuir isothemal adsorption model. Qualitative testing of real batik waste indicates that activated carbon can reduce the dyes waste containing Naphthol Yellow Sexhibited by the color of batik waste which is more faded.

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Ni Putu Diantariani

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+628123640424

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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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Bali

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Home Page

OAI Link

Editorial Team

Contact

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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

Abstract

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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