Jurnal Kimia (Journal of 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.
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518 Documents
<![CDATA[STUDI FOTODEGRADASI CONGO RED MENGGUNAKAN UV/ZnO/REAGEN FENTON ]]>
<![CDATA[Ni Luh Putu Widiantini]]>;
<![CDATA[James Sibarani]]>;
<![CDATA[Manuntun Manurung]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2013.v07.i01.p11
<![CDATA[The study of photodegradation of Congo Red using UV light, with addition ZnO catalyst, H2O2 and Fe2+ has been carried out. This study included the determination of optimum amount of ZnO, H2O2, Fe2+, pH optimum and the determination of system which shows the most effective in Congo Red photodegradation. The results showed that the optimum conditions to degradate 100 ppm of Congo Red solution were 60 mg of ZnO, 4 ml of H2O2 (0,0392 mol), 20 mg FeSO4 (0,0013 mol) and pH 5. The highest percentage of degradation was 93,6093 + 0,12 % reached using UV/ZnO/H2O2/ Fe2+ system at 5 hour photodegradation time. In this processes addition of ZnO, H2O2, and FeSO4, and pH were important parameters to increase the percentage of photodegradation.]]>
<![CDATA[SINTESIS NANOKOMPOSIT LEMPUNG BENTONIT-ASAM SALISILAT DENGAN METODE SOL-GEL DAN KARAKTERISASINYA DENGAN XRD DAN IR-FTIR ]]>
<![CDATA[Ida Ayu Gede Widihati]]>;
<![CDATA[Ni Putu Diantariani]]>;
<![CDATA[Ni Made Puspawati]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 11. No.2 Juli 2017 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2017.v11.i02.p07
<![CDATA[Dalam penelitian ini dilakukan sintesis nanokomposit lempung bentonit-asam salisilat dengan metode sol gel melalui mekanisme interkalasi. Pada proses interkalasi ini, asam salisilat harus dibuat dalam bentuk senyawa kompleks dengan ion Fe(III) agar asam salisilat dapat masuk ke ruang antar lapis lempung. Pada proses interkalasi tahap pertama, konsentrasi interkalat divariasikan dengan tujuan mendapatkan nanokomposit yang memliki karakter kimia fisik yang terbaik. Sifat kimia fisik nanokomposit lempung bentonit-asam salisilat dikarakterisasi dengan menggunakan metode difraksi sinar X, FTIR. Pada tahap kedua dilakukan proses interkalasi dengan waktu reaksi yang bervariasi. Dari data XRD didapatkan bahwa variasi konsentrasi interkalat tidak menyebabkan perubahan kristalinitas yang signifikan. Ketiga komposit yang terbentuk menunjukkan puncak difraktogram yang sama dengan bentonit awal. Interkalasi asam salisilat ke dalam ruang antar lapis lempung bentonit menyebabkan peningkatan jarak antar lapis (d basal spacing) menjadi 16-17Å. Dari spektra IR dapat dilihat beberapa pita absorpsi yang karakteristik untuk lempung dan modifikasinya. Pita serapan pada bilangan gelombang 3620 cm-1 menunjukkan vibrasi stretching dari –OH untuk Al-OH pada montmorillonit. Bilangan gelombang 1640 cm-1 mengindikasikan adanya –OH bending dari air yang terabsorpsi. Pada ketiga spektra di atas terjadi pergeseran bilangan gelombang ke, (a). 1631,78 cm-1 (b). 1635,64 cm-1 dan (c). 1633,7 cm-1. Pita serapan pada bilangan gelombang 1115 cm-1 mengindikasikan adanya Si-O stretching untuk lapisan-lapisan silikat. Pada nanokomposit yang dihasilkan terjadi pergeseran bilangan gelombang tersebut ke 1109,7 cm-1(a), 1111cm-1 (b dan c). Pita serapan pada bilangan gelombang 1633,71 cm-1, 1631,78 cm-1dan 1635 cm-1 pada ketiga spectra di atas menunjukkan adanya vibrasi dari gugus C=O yang berasal dari asam salisilat. Adanya pita serapan pada bilangan gelombang 920 cm-1 mengindikasikan vibrasi bending dari Al-Al-OH. Karakterisasi dengan FTIR menunjukkan bahwa pemanasan dari 120°C hingga 250°C tidak mengakibatkan perubahan struktur yang ditunjukkan dengan tidak adanya pergeseran pita vibrasi yang dimilki oleh masing-masing gugus fungsi dari nanokomposit lempung bentonit asam salisilat]]>
<![CDATA[KULIT BUAH JERUK LIMAU (Citrus amblycarpa (Hassk.) Osche) SEBAGAI ANALGESIK ]]>
<![CDATA[R. A. I. K. Maharani]]>;
<![CDATA[N. K. Cahyaningsih]]>;
<![CDATA[M. D. Abimanyu]]>;
<![CDATA[K. W. Astuti]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol.14 No.1 Januari 2020 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2020.v14.i01.p05
<![CDATA[Nonsteroidal anti-inflammatory drugs (NSAIDs) are the treatment options for relieving pain. However, long-term use can trigger gastrointestinal bleeding. Therefore, alternative analgesics which have the same therapeutic effect with lower side effects are needed. Limau (Citrus amblycarpa) is an empirical drug for tingling and cramping. The aim of the study is to determine the analgesic activity of ethanol extract of C. amblycarpa fruit peel. The method used in testing analgesic activity is the Hot Plate method. The study was conducted by dividing 30 mice into 6 groups. The group given CMC-Na 1% was used as a negative control, the group given suspension of sodium diclofenac dose of 6.5 mg/kg of body weight was used as a positive control, and the group given suspension of ethanol extract of C. amblycarpa fruit peel with dose variations 100, 300 and 600 mg/kg of body weight. The test animals were placed on top of the Hot Plate with a temperature of 70°C at 30 minutes after giving suspension test and the response time of mice to heat was observed every 30 minutes for 3 hours with cut off time 15 second. Based on the test results, it can be concluded that the administration of ethanol extract of C. amblycarpa fruit peel with 100, 300 and 600 mg/kg of body weight gave analgesic activity on mice compared to the negative controls (CMC-Na 1%). Keywords: C. amblycarpa, Fruit Peel, Analgesics, Hot Plate]]>
<![CDATA[ANALISIS FATTY ACID ETHYL ESTER DENGAN INFRA RED DALAM DARAH TIKUS WISTAR SETELAH MINUM ALKOHOL SECARA AKUT ]]>
<![CDATA[Ni Made Suaniti]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 5, No. 1 Januari 2011 ]]>
Publisher : <![CDATA[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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<![CDATA[Fatty acid ethyl esters (FAEE) are the result of biochemical reactions in the body after drinking alcohol acutely. In general, alcoholic drinks contain ethanol, which can be analyzed chemically as ethanol and its metabolites. Metabolite of ethanol are the result of ethanol oxidation reaction and the reaction of ethanol with endogenous compaounds in the body. One of the metabolites of ethanol is an ester compound resulted from the reation of ethanol with fatty acids. This study aims to prove the existence of FAEE functional group as one of biochemical markers in acute alcohol consumers. Two groups of wistar rats were given distilled water (control group) and 20% alcohol (treaed group) every day for 1 week. Biochemical markers analyzed are FAEE. This research was conducted in two phases: the first phase, is the treatment of rats with acute alcohol. The second phase, analysis of chemical compounds: FAEE with Infra Red Spectrophotometer. Wistar rat blood samples taken 6 and 24 hours after drinking alcohol acutely were analyzed qualitatively. Functional Groups indicating the presence of FAEE are C-H (3600-2500 cm-1), the ketone group (C = O) appears at 1870-1540 cm-1, stretching vibration of CO or C-C (= O)-O at 1190-1140 cm- 1.]]>
<![CDATA[ISOLASI DNA METAGENOMIK DALAM RANGKA STUDI METANOGENESIS PADA TANAH SAWAH ]]>
<![CDATA[Ni Luh Putu Mustika Praptiwi]]>;
<![CDATA[Iryanti Eka Suprihatin]]>;
<![CDATA[I Nengah Wirajana]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 8, No. 1 Januari 2014 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2014.v08.i01.p08
<![CDATA[Metagenomic is a new approach of complex genomes analysis from environmental samples. Isolation of total DNA from rice field soil sample has been conducted. Rice field, as an agriculture land, has been known to contribute 76% of total methane (CH4). The purpose of this study was to obtain metagenomic DNA isolated from rice field soil in order to study methanogenesis. Metagenomic DNA was isolated by direct and indirect cell lysis methods. Direct cell lysis method was conducted by directly lysing the cells in soil matrix followed by separation of DNA from the matrix and cell debris. Isolation of metagenomic DNA with indirect cell lysis method was carried out by cell separation from soil matrix followed by cell lysis. Metagenomic DNA were analyzed by agarose gel electrophoresis and UV-Vis spectrophotometry at ? 230, 260, and 280 nm. The results showed that metagenomic DNA could be isolated from rice field soil samples using direct and indirect cell lysis methods. Electrophoresis results showed that total DNA quality obtained by the indirect cell lysis was relatively less fragmented compared with direct cell lysis method. Spectrophotometric analysis showed that the total DNA isolated by indirect cell lysis was contaminated by humic acid more than metagenomic DNA isolated by direct cell lysis method. However, the metagenomic DNA by indirect cell lysis was contaminated by protein less than metagenomic DNA that obtained by direct cell lysis method.]]>
<![CDATA[ANALISIS BAHAN PENGAWET BENZOAT PADA SAOS TOMAT YANG BEREDAR DI WILAYAH KOTA DENPASAR ]]>
<![CDATA[I M. Siaka]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 3, No. 2 Juli 2009 ]]>
Publisher : <![CDATA[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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<![CDATA[This paper reports the determination of benzoate, as preservative, in tomato sauces distributed in Denpasar.The analysis was performed by the technique of acid-base titration following solvent extraction of the benzoate withdiethylether. Qualitatively, it was found that the sauce samples both branded and unbranded ones contained benzoate.Quantitatively, it was obtained that the benzoate content in the tomato sauces varied in a range of 600.12 – 1271.86mg/kg. Generally, all branded tomato sauces contained benzoate less than that of maximum limit allowed by theregulation of Health Ministry of RI No. 722/MENKES/Per/IX/1988 (1000 mg/kg). On the other hands, about 33% ofthe unbranded sauce samples contained benzoate more than the maximum limit allowed by the regulation.]]>
<![CDATA[ANALISIS PRIMER UNTUK AMPLIFIKASI PROMOTER inhA MULTIDRUG RESISTANCE TUBERCULOSIS (MDR-TB) DENGAN METODE POLYMERASE CHAIN REACTION (PCR) ]]>
<![CDATA[I Gusti Ayu Agung Septiari]]>;
<![CDATA[Putu Sanna Yustiantara]]>;
<![CDATA[Sagung Chandra Yowani]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 9, no. 1 Januari 2015 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2015.v09.i01.p19
<![CDATA[The aim of this study was to analyze several primary combinations for amplifying inhA promoter region by in silico and in vitro ways. Primary in silico’s analysis was done by Clone Manager Suite 6 program. fabG gene sequence of M. tuberculosis was downloaded from www.ncbi.nlm.nih.gov (genbank: U66801.1) and used as DNA template. In vitro detection was done by PCR technique using P16 and 86 M. tuberculosis MDR isolates as DNA template. Amplification was done in described conditions: predenaturation at 95°C for 15 minutes, 45 cycle of amplication (denaturation on 94°C for 1 minute, annealing on 54°C for 1 minute 20 seconds dan extension on 72°C for 1 minute 10 seconds) and also post extension on 72°C for 10 minutes. PCR product was detected by agarose gel elektroforesis (1,5%). In conclusion, combination of primary forward (mabA-inhA-promoter-FS) 5’-ACATACCTGCTGCGCAAT-3’ (18 nucleotide) and primary reverse (mabA-inhA-promoter-R) 5’-CTCCGGTAACCAGGACTGAA-3’ (20 nucleotide) (Chen et al., 2011) have met the good criteria of primary combination which was seen from several aspects such as: primary length, Tm value, %GC, stability, number of hairpins, dimers and runs. In vitro detection showed that the primary combination also amplified inhA promoter region with the length of 284 pb]]>
<![CDATA[VARIASI KONSENTRASI DAN pH TERHADAP KEMAMPUAN KITOSAN DALAM MENGADSORPSI METILEN BIRU ]]>
<![CDATA[Turmuzi Tammi]]>;
<![CDATA[Ni Made Suaniti]]>;
<![CDATA[Manuntun Manurung]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 7, No. 1 Januari 2013 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2013.v07.i01.p02
<![CDATA[The effects of chitosan concentration and pH on adsorption properties of the chitosan extracted from shrimp shell waste to adsorb methylen blue had been studied. Chitosan was made by two steps namely the isolation of chitin and the chitin deacetylation. The chitin isolation itself was conducted by three sequence procedures which were deproteination, demineralization, and depigmentation. The deacetylation was conducted by heating the chitin obtained in the concentrated solution of NaOH 50% (w/v) at 90oC for 120 minutes. The degree of the deacetylation was 54,65%. The maximum concentration of 0,2% (w/v) at pH 7 showed the highest adsorption (%D) of 50 mL 10 ppm methylene blue of 95,044%. ]]>
<![CDATA[ELEKTROLISIS LOGAM PERAK DARI LIMBAH PENCUCIAN FILM FOTOGRAFI ]]>
<![CDATA[I Made Sutha Negara]]>;
<![CDATA[I Nengah Simpen]]>;
<![CDATA[Ida Bagus Made Suryatika]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol. 11. No. 1 Januari 2017 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2017.v11.i01.p15
<![CDATA[Penelitian ini bertujuan untuk menentukan kondisi optimum pemisahan logam perak dari limbah film fotografi secara elektrolisis. Elektrolisis limbah film fotografi dilakukan dengan perlakuan 4 variasi bentuk (geometri) katoda pada luasan yang sama dan 5 variasi jarak elektroda pada tegangan dan arus konstan. Pada awal dan akhir setiap elektrolisis, parameter yang diukur adalah massa katoda secara gravimetri dan kandungan perak dalam limbah diukur dengan spektrofotometer serapan atom. Hasil penelitian diperoleh bahwa pada optimasi bentuk elektroda, bentuk lempeng/plat memberikan penurunan konsentrasi yang paling tinggi (79,56% atau 0,3324 g) dibandingkan dengan katoda berbentuk silinder, balok dan prisma segi enam. Bentuk lempeng/plat dipilih sebagai elektroda dalam penentuan pengaruh variasi jarak terhadap persentase penurunan konsentrasi perak, massa perak yang menempel di katoda dan massa endapannya. Hasil variasi jarak elektroda pada katoda lempeng/plat, terbaik menunjukkan pada jarak 2 cm dengan pemisahan paling tinggi yaitu 79,99%. Perak yang dapat dipisahkan tidak seluruhnya menempel pada katoda setelah elektrolisis, melainkan perak dominan mengendap]]>
<![CDATA[KOMPOSIT DEGRADABEL POLIETILENA TEREFTALAT DENGAN SELULOSA MENGGUNAKAN REAGEN FENTON (H2O2/Fe2+) ]]>
<![CDATA[I M. Trimastiya]]>;
<![CDATA[I M. S. Negara]]>;
<![CDATA[O. Ratnayani]]>;
<![CDATA[I N. Simpen]]>
<![CDATA[ Jurnal Kimia (Journal of Chemistry) Vol.13 No.2 Juli 2019 ]]>
Publisher : <![CDATA[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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DOI: 10.24843/JCHEM.2019.v13.i02.p13
<![CDATA[PET is a non-degradable type of plastic that can cause environmental problems. This study aimed to form composites by cross-linking PET with cellulose using Fenton reagent initiator, finding out the effect of the addition of H2O2 on the fenton reagent used as an initiator in the mixture of PET-cellulose composites to water absorption and the rate of degradation in wet and dry soil media. The steps carried out in making PET-cellulose composites was refining PET using swelling techniques, followed by the formation of PET-cellulose composites by cross-linking through free radical reaction using fenton (H2O2/Fe2+) as the initiator with the variation of H2O2 amount (30 grams, 60 grams, 90 grams). The resulting composites were tested for water absorption and degradation properties in wet soil media and dry soil with untreated PET control. Characterization was carried out by functional group analysis using FTIR and its morphology with SEM. The results of the study showed that the composite making using the technique of cross-linking between polyethylene terephthalate and cellulose using fenton reagents was successfully carried out where the degradation rate of PET-cellulose composites slowed as the amount of hydrogen peroxide was used. In PET-cellulose composites, the more amount of H2O2 used, the weaker the absorption of the composite to water was. Keywords: degradable, fenton (H2O2/Fe2+), PET (Polyethylene Tephthalate), cellulose, composite.]]>
