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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 17 Documents

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Search results for , issue "Vol.13 No.1 Januari 2019" : 17 Documents clear

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.

KANDUNGAN LOGAM BERAT TOTAL Pb DAN Cd DALAM SEDIMEN DAN BUAH PEDADA (Sonneratia alba) DI MUARA SUNGAI BADUNG N. K.D.S. Widari; I M. Siaka; I. E. Suprihatin
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

This paper discusses the total contents of Pb and Cd metals in sediment and pedada fruit (Sonneratia alba) collected from Estuary of Badung River. Wet digestion method using reverse aqua regia was performed to extract the metals. All metals were measured using Atomic Absorption Spectrophotometer (AAS). The results showed that the total contents of Pb and Cd in the sediments were 288.0131-376.0544 and 1.4849-7.0230 mg/kg, respectively, while in the pedada fruit were 160.0212-245.4012 and 3.8151-14.6917 mg/kg, respectively. Based on the results, the content of Pd and Cd in the sediment and pedada fruit in the area of Badung River Estuary exceeded the limits allowed indicating that the sediment and the pidada fruts are polluted by Pb and Cd metals

SINTESIS DAN KARAKTERISASI ZEOLIT-TiO2 SERTA PEMANFAATANNYA SEBAGAI FOTOKATALIS UNTUK DEGRADASI RHODAMIN B W. A. Fauzi; I N. Simpen; I W. Sudiarta
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 synthesis of zeolite-TiO2 composite has been successfully performed by mixing the H2SO4-enriched natural zeolite to TiO2. The composites are formed then characterized functional groups using Fourier Transform Infrared (FTIR) and surface area with BET (Breunaur, Emmet and Teller) method. The characterization results showed that the synthesis of zeolite-TiO2 composites is relatively successful. Those can be seen from BET characterization higher to the composite surface area from 63.031 m2/g to 73.913 m2/g, then reinforced by the appearance of the functional groups of TiO2 in zeolite at wavelength 2345.44 cm-1, 792.74 cm-1 and 424.34 cm-1. Furthermore, the composite is used for the photodegradation of rhodamin B dyes with the highest degradation percentage was 97.39% in optimal irradiation contact time was reached at 10 minutes and the effective pH of 4

PEMBUATAN DAN KARAKTERISASI ARANG AKTIF DARI BAMBU APUS (Gigantochloa apus) DENGAN AKTIVATOR H3PO4 M. Manurung; E. Sahara; P. S. Sihombing
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

This paper discusses the manufacture and characterization of activated carbon from bamboo apus (Gigantochloa apus) with H3PO4 activator. The aims of study were to determine the optimum carbonization temperture and time as well as the amount of phosphoric acid required as the chemical activator. In addition, the activated carbon was also characterized following the Indonesian National Standard (SNI-1995) for activated carbon. Tthe activated carbon functional groups was determined using FTIR spectroscopy. The result showed that the optimum temperature of carbonization was 600oC, the carbonization time was 90 minutes and the phosphoric acid required was 20 gram for 1 gram carbon. Under these conditions, the activated carbon resulted met SNI-1995 with the characteristics as follows: the water content was (1.11±0.83%), the level of volatile substances was (8.13± 0.27%), the total ash amount was (7.33±1.35%), the carbon contents was (83.40±0.27%). and the absorption capacities of iodine and methylen blue were of 1057.75 mg/g, 472.88 mg/g, respectively. FTIR identification indicated the existence of some functional groups, namely aromatik, ketone, and hydroxyl.

THE QUALITY OF COCONUT OIL PREPARED USING HEATING TECHNIQUE WITH ADDITION OF CARROT POWDER (Daucus carrota L) AS NATURAL ANTIOXIDANT N. M. Suaniti; M. Manurung; O. Ratnayani; A. A. I. S. J. Dewi
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

Spoilage of coconut oil is indicated by rancidity caused by the oxidation and hydrolysis reactions. One of the efforts that can be carried out to inhibit the rancidity is by adding a natural antioxidant, such as carrot (Daucus carrota L) powder, into the coconut oil. This research aimed to find out the effect of the addition of carrot powder into the coconut oil on some parameters namely iodine number, peroxide number, FFA level, acid value and water content. The coconut oil was prepared by heating technique followed by the addition of carrot powder in the ratio of coconut oil:carrot of 100:1, 100:2, 100:3, 100:4, 100:5, and coconut oil:BHT (Butyl Hydroxy Toluene) of 100:1 as the positive control. The results were then compared to the Indonesian National Standard of SNI 01-2902-1992. It was found that the coconut oil added with carrot powder in the ratio of 100:4 showed the best quality with iodine number of 8.4092 ± 0.5761g iodine/100g, peroxide number of 3.2363 ± 1.9168mg O2/100g, Free Fatty Acid level (FFA) of 0.1676 ± 0.0037 %, acid value of 0.4656 ± 0.0119mg KOH/g and water content of 0.1038 ± 0.0068 %. The characterization using FTIR (Fourier-transform infrared spectroscopy) of such quality of coconut oil indicated some functional groups of OH, CH, CH3, C=O, CºC aliphatic and C=C aliphatic were contained.

ANALISIS PROFIL ASAM LEMAK DAGING AYAM PETELUR AFKIR YANG DIFERMENTASI SECARA TRADISIONAL BALI MENGGUNAKAN GAS CHROMATOGRAPHY-MASS SPECTROMETRY (GC-MS) I. A. Okarini; H. Purnomo; I. E. Radiati; N. M. Suaniti
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

This study was aimed to determine the fatty acids profile in fermented products of chicken breast meat (Musculus pectoralis superficialis) of spent hen layer using Gas Chromatography Mass Spectrophotometric technique. The chicken used was of Isa Brown strain after a period of laying of 76 weeks which was obtained from some local farms in Tabanan, Denpasar, and Gianyar - Bali. The chicken meat was cut into small pieces then mixed with ground spices concisting of galangal, coriander, garlic, brown sugar, salt, white pepper and coconut oil. The batter meat was mixed evenly and then wrapped with upih, in which both ends were tied with a rope followed by drying under the sun for 5 days (natural fermentation process). The profile of the fermented chicken meat was integrated and presented descriptively. The results showed that the fermented meat contained higher bioactive component of fatty acids such as oleic acid, palmitic acid and linoleic acid compared to that of the control, but lower stearic acid content. It was also evident that the cholesterol content was the lowest at the end of drying.

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

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 %) .

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

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.

POTENSI EKSTRAK ETANOL BAWANG MERAH (Allium ascolonicum L.) DAN GARAM NaCl MENURUNKAN LUAS AREA SERTA MENINGKATKAN KONTRAKSI JARINGAN LUKA BAKAR RINGAN I M. Sukadana; S. Rahayu; Melli Melli
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

Burns is a skin response and subcutaneous tissue to temperature or thermal trauma that affects skin damage. The weight or severity of tissue damage from burns is influenced by several factors including deep burns, burns area, burn location, general body health, injury mechanism and age. The area of ??burns and the percentage of wound contractions is an indicator of the healing process of minor burns. This study used 25 wistar rats divided into 5 treatment groups with randomized posttest only control group design as follows; K: given vaseline treatment (negative control), Kp: given bioplacenton treatment (positive control), P1: given salt treatment at 7.5% concentration in vaseline, P2: given onion extract treatment at 40% concentration in vaseline, and P3: given a mixture of onion extract 40% and kitchen salt at a concentration of 7,5% in vaseline. The result of One-Way ANOVA and Post Hoc Test LSD using SPSS for Windows version 19 shows P2 treatment group is onion extract of 40% give the best result concentration of onion extract so it is very potential to be developed further as light burning agent compared to P1 and P3 treatment group because of its ability to decrease the area of ??340,79 mm2 on the first day to 11,75 mm2 and increased wound contraction by 81,59% at the end of treatment

SUHU DAN WAKTU OPTIMUM PROSES EKSTRAKSI ANTOSIANIN DALAM UBI JALAR UNGU (Ipomoea batatas L.) DENGAN ?-L-ARABINOFURANOSIDASE I N. Wirajana; N. M. T. Juliasari; A.A. I.A.M. Laksmiwati; N. W. Bogoriani
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

Enzyme-assisted extraction (EAE) method is one of the most environmentally friendly methods of enzyme application in the extraction of bioactive compounds. The purpose of this study was to determine the optimum temperature and time required in the extraction of anthocyanin compounds from purple sweet potato (Ipomoea batatas L.) with and without ?-L-arabinofuranosidase (AbfA) - assisted. The AbfA enzyme was obtained from Saccharomyces cerevisiae recombinant strain BJ1824 contain pYHMI-Af plasmid. The optimum temperature and time in the extraction of anthocyanin compound with and without ?-L-arabinofuranosidase from purple sweet potato were performed on the 40, 50, 60 and 700C; and 150, 180, 210 minutes. The extraction was done by ethanol solvent of 60,32% (v/v) acidified with citric acid of 2,39% (b/v). The measurement of anthocyanin levels using UV-Vis Spectrophotometer at 527 nm and 700 nm wavelengths at pH 1,0 and 4,5. The optimum condition of non-enzyme-assisted extraction was at 600C for 210 minutes, with the anthocyanin levels of 26,3842 mg/L; while with the AbfA enzyme-assisted at 500C for 180 minutes, with the anthocyanin levels of 28,2056 mg/L. The extraction with enzyme-assisted resulted the anthocyanin levels of 6,90% higher than without the using of enzyme.

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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

OAI Link

Editorial Team

Contact

Reviewer

Google Scholar

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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Abstract

Abstract

Abstract

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Abstract

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