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INDONESIA
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry)
Published by Universitas Udayana
ISSN : -     EISSN : 23027274     DOI : -
Core Subject : Science, Engineering,
Chemical Engineering, Chemistry & Bioengineering Chemistry Electrical & Electronics Engineering
Jurnal ini merupakan jurnal elektronik di bidang kimia terapan yang dikelola oleh Magister Kimia Terapan, Program Pascasarjana, Universitas Udayana, Bali. Jurnal ini memuat artikel-artikel penelitian yang berhubungan dengan Kimia Terapan yang meliputi Kimia Analitik, Kimia Polimer, Biokimia, Kimia Bahan Alam, Kimia Fisik, Kimia Permukaan, Biomaterial,dan bidang-bidang terkait. Jurnal ini akan terbit 2 kali dalam setahun yaitu pada bulan Pebruari dan September. Jurnal ini terbuka untuk diakses oleh semua kalangann(Open Access Journal)
Arjuna Subject : -
Articles 184 Documents
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POTENSI FLAVONOID EKSTRAK BIJI MAHONI (Swietenia mahagoni Jacq) UNTUK MENURUNKAN KONSENTRASI 8-OHdG PADA URIN TIKUS WISTAR JANTAN YANG TERPAPAR ETANOL Agung Ari Chandra Wibawa; I Made Dira Swantara; Manuntun Manurung
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 4 No 2 (2016)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK : Penelitian ini bertujuan untuk menentukan fraksi aktif senyawa flavonoid  biji mahoni sebagai antioksidan untuk menurunkan konsentrasi 8-OHdG dalam urin tikus yang terpapar etanol. Uji kadar total flavonoid pada fraksi dilakukan dengan metode spektrofotometri UV-Vis yang menunjukan fraksi n-butanol mengandung flavonoid terbanyak yaitu sebesar 41,734 mg/L. Pengukuran konsentrasi 8-OHdG dilakukan dengan ELISA pada panjang gelombang 450 nm. Hasil analisis dengan ELISA, dosis 50, 100, 150, dan 200 mg/kg selama 21 hari bb terbukti dapat menurunkan konsentrasi 8-OHdG pada urin tikus yang terpapar etanol selama 30 hari. Konsentrasi 8-OHdG pada perlakuan fraksi n-butanol dosis 50, 100, 150, dan 200 mg/kg bb, secara berturut-turut dapat diprediksi membutuhkan waktu selama 64, 66, 54, dan 32 hari agar konsentrasi 8-OHdG menjadi 0,3318 ng/mL.   ABSTRACT : This study aims to determine the active fraction flavonoid compounds in mahoni seeds as the antioxidant in decreasing urinary concentration of 8-OHdG in rats after being exposed to ethanol. Total flavonoid test was conducted using spectrophotometry UV-Vis method showing that n-buthanol fraction has the highest flavonoid level of 41,73 mg/L. The measurement of urinary 8-OHdG concentration has been carried out by ELISA on wavelength of 450 nm. The results showed that the concentration of 8-OHdG with dose of 50, 100, 150, and 200 mg/kg of body weight decreased during 21 days in male rats after being exposed to ethanol. The 8-OHdG concentration after treatment with  n-buthanol fractions with doses of 50, 100, 150, and 200 mg/kg of body weight was predicted to be 0,3318 ng/mL after 64, 66, 54, 31 days respectively.
ISOLASI DNA METAGENOMIK DARI SPUTUM PASIEN TUBERKULOSIS DAN AMPLIFIKASI DENGAN PRIMER PROMOTER inhA Ni Made Yustikarini; Sagung Chandra Yowani; I Nengah Wirajana
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 3 No 3 (2015)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

 ABSTRAK: Penelitian ini bertujuan untuk memperoleh DNA metagenomik dari sputum pasien tuberkulosis dan mengamplifikasi dengan menggunakan primer promoter inhA. Penelitian ini dilakukan dalam tiga tahap, yaitu: isolasi DNA metagenomik dari sputum pasien tuberkulosis, amplifikasi menggunakan sepasang primer promoter inhA dari M. tuberculosis dengan metode PCR, dan elektroforesis gel agarosa terhadap hasil amplifikasi. Elektroforegram hasil amplifikasi menunjukkan bahwa isolasi DNA metagenomik dari sputum pasien tuberkulosis telah berhasil dilakukan dengan metode modifikasi maupun dengan kit. Ukuran pita fragmen DNA sekitar 284 bp dari hasil amplifikasi (amplikon) yang diperoleh dari DNA metagenomik sputum P.48B, P.46B, dan P.47B  MDR- TB  merupakan ukuran yang sesuai dengan bagaian dari daerah promoter inhA M. tuberculosis. Ukuran amplikon ini sama dengan ukuran amplikon yang sebelumnya telah diperoleh dari amplifikasi terhadap DNA M. tuberculosis oleh peneliti sebelumnya dengan menggunakan primer yang sama.ABSTRACT: The aims of this research were to obtain metagenomic DNA from sputum of tuberculosis patients and to amplify it by using inhA promoter primer. This research was conducted in three steps covering the DNA metagenomic isolation from sputum of tuberculosis patients, amplification of inhA promoter region of M. tuberculosis by using specific primer pair by PCR (Polymerase Chain Reaction) method, and electrophoresis of amplified products using agarose gel. The electrophoregram of amplified products showed that the metagenomic DNA isolation from sputum of tuberculosis patients was successfully carried out both by the modified method and by a kit. The size of DNA fragment bands about 284 bp of amplified products (amplicons) which obtained from the metagenomic DNAs of P.48B, P.46B, P.47B sputum was suitable size with a part of inhA promoter region of M. tuberculosis. The size of these amplicons was the same size with the amplicons from M. tuberculosis DNA reported by other researchers.
SELULASE DAN AMILASE DARI DAUN LONTAR (Borassus flabelliformis) YANG TELAH LAPUK SERTA UJI INHIBISI DENGAN MINYAK SEREH DAN CENGKEH Ida Bagus Putu Eristya Putra; I Nengah Wirajana; Anak Agung Istri Agung Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 2 (2019): volume 7, Nomor 2, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Pelapukan naskah lontar salah satunya disebabkan oleh mikroba yang menghasilkan enzim pendegradasi selulosa dan amilum yang terkandung dalam daun siwalan (lontar). Tujuan penelitian ini adalah untuk menentukan aktivitas selulase dan amilase dari mikroba selulolitik dan amilolitik yang diisolasi dari lontar yang telah lapuk, serta mengetahui kemampuan minyak sereh dan cengkeh menginhibisi aktivitas selulase dan amilase dari kedua jenis mikroba tersebut. Isolasi mikroba selulolitik dan amilolitik dari lontar yang telah lapuk dilakukan dengan metode pengenceran dan dikultivasi dalam media yang mengandung substrat spesifik. Substrat carboxymethyl cellulose (CMC) digunakan untuk mikroba selulolitik, sedangkan substrat amilum untuk mikroba amilolitik. Mikroba selulolitik dideteksi dengan adanya zona bening di sekitar koloni mikroba setelah ditambahkan larutan congo red 0,1% (b/v), sedangkan untuk mikroba amilolitik ditambahkan dengan larutan iodin 0,1% (b/v). Aktivitas selulase dan amilase ditentukan berdasarkan gula pereduksi yang dihasilkan dari reaksi enzim-substrat setelah direaksikan reagen dinitro salisilat (DNS) dan ditentukan dengan spektrofotometri UV-Vis. Hasil penelitian diperoleh mikroba selulolitik (C3B) dengan aktivitas selulase sebesar 0,068 U/mL; dan mikroba amilolitik (A5A) dengan aktivitas amilase sebesar 0,827 U/mL. Uji inhibisi menggunakan minyak sereh menunjukkan penurunan aktivitas selulase 4,41% dan penurunan aktivitas amilase 30,96%. Uji inhibisi menggunakan minyak cengkeh menunjukkan penurunan aktivitas amilase 92,50%. Hasil ini mengindikasikan adanya potensi minyak sereh dan cengkeh sebagai bahan untuk konservasi lontar. Kata kunci: inhibitor; aktivitas enzim; selulase; dan amilase ABSTRACT: Weathering of the manuscript was caused by one of the microbes that produced cellulose and starch degrading enzymes contained in the palm-leaf (lontar). The purpose of this study was to determine the activity of cellulase and amylase from cellulolytic and amylolytic microbes isolated from weathered palm, also know the ability of lemongrass and clove oil to inhibit cellulase and amylase activity from both types of microbes. Isolation of cellulolytic and amylolytic microbes from decaying palms was carried out by a dilution method and cultivated in media containing specific substrates. Carboxymethyl cellulose (CMC) substrate is used for cellulolytic microbes, while starch substrates for amylolytic microbes. Cellulolytic microbes were detected by the presence of clear zones around the microbial colonies after adding 0.1% (w/v) congo red solution, while for amylolytic microbes added with 0.1% (w/v) iodine solution. Cellulase and amylase activity was determined based on reducing sugars produced from enzyme-substrate reactions after reacting dinitro salicylate (DNS) reagents and determined by UV-Vis spectrophotometry. The results obtained by cellulolytic microbes (C3B) with cellulase activity of 0.068 U/mL; and amylolytic microbes (A5A) with amylase activity of 0.827 U / mL. Inhibition test using lemongrass oil showed a decrease in cellulase activity 4.41% and decreased amylase activity 30.96%. Inhibition testing using clove oil showed a 92.50% decrease in amylase activity. These results indicate the potential for lemongrass and clove oil as ingredients for palm-leaf conservation.
FEASIBILITY STUDY BASED ON ECONOMIC PERSPECTIVE OF COBALT NANOPARTICLE SYNTHESIS WITH CHEMICAL REDUCTION METHOD Fira Nandatamadini; Suci Karina; Asep Bayu Dani Nandiyanto
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 1 (2019): Volume 7, Nomor 1, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRACT: Cobalt nanoparticle powder is synthesized by chemical reduction method. Cobalt nanoparticle powder is synthesized through reduction of aqueous solution of Co ions by NaBH4 using cetyltrimethylammonium bromide (CTAB) as cationic surfactant. Cobalt nanoparticles have many applications, especially in the field of technology. The successfulness of a project will produce opportunities that make it possible to advance technology in developing countries. For this reason, a feasibility study for the synthesis of cobalt powder nanoparticles is needed. This project has estimated ideal conditions for bad cases that will occur in production by adding several parameters which are raw materials and sales. This feasibility study was using two parameters which were economic analysis and evaluation techniques including Gross Provit Margin (GPM), Cumulative Net Present Value (CNPV), Break Even Poit (BEP), Payback Period (PBP). These parameters were to show potential profitability for the project. Although the IRR value of this project was not very promising, all other parameters had positive impacts. The project that used a reducing metal salt method which is an easy process and purchased relatively inexpensive equipments will provide benefits and attrac investors of this project.
DISTRIBUSI TIMBAL (Pb) DAN KADMIUM (Cd) PADA BUAH TANAMAN MANGROVE Rhizophora mucronata DI MUARA SUNGAI MATI KABUPATEN BADUNG Ita Hidayatus S; Iryanti Eka Suprihatin; A.A.I.A Mayun Laksmiwati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 2 No 2 (2014)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Telah dilakukan penelitian tentang kandungan logam timbal (Pb) dan kadmium (Cd) pada buah mangrove Rhizophora mucronata di muara sungai Mati kabupaten Badung. Penelitian ini bertujuan untuk mengetahui besar akumulasi logam berat pada buah  mangrove Rhizophora mucronata dari lingkungannya. Penentuan konsentrasi logam dilakukan dengan menggunakan alat Atomic Absorption Specthtrophotometer (AAS) dengan metode adisi standar. Kandungan Pb dan Cd dalam sampel buah mangrove Rhizophora mucronata berturut-turut yaitu 138,4078 ± 0,8434 mg/kg dan 2,1335 ± 1,0211 mg/kg.ABSTRACT: Research on lead and cadmium contents of Rhizophora mucronata fruits in the estuary of Mati River in the district of Badung, Bali has been conducted. This study was aimed to determine heavy metals accumulation in fruits of Rhizophora mucronata from their environment. The concentrations of Pb and Cd were determined by the use of Atomic Absorption Specthrophotometer followed by a standard addition method. Total concentrations of Pb and Cd in fruits of Rhizophora mucronata were 138,4078 ± 0,8434 mg/kg  and 2,1335 ± 1,0211  mg/kg respectively. This finding suggests further exploration considering that the fruits of this plant and other species of mangrove are used as foodstuffs
OPTIMASI EKSTRAKSI ENFLEURASI FRAGRANCE DARI BUNGA BINTARO (Cerbera odallam G.) I Made Sudarsana; Ni Made Suaniti; Ni Made Puspawati
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 4 No 1 (2016)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Ekstraksi Enfleurasi dapat dioptimasi dengan memvariasikan perbandingan lemak dan bunga Bintaro serta waktu ekstraksi. Tujuan dari penelitian ini untuk menentukan kondisi optimal ekstraksi enfleurasi dan kandungan senyawa fragrance pada bunga Bintaro. Optimasi ekstraksi enfleurasi dilakukan dengan memvariasikan perbandingan lemak dan bunga Bintaro serta waktu ekstraksi. Identifikasi senyawa pada fragrance dari bunga Bintaro dilakukan menggunakan Kromatografi Gas Spektrometri Massa (GC-MS). Perbandingan lemak dan bunga serta variasi waktu optimal yang diperoleh untuk ekstraksi enfleurasi adalah 3 : 21 (w/w) dan 48 jam. Senyawa fragrance dalam bunga bintaro  muncul  tiga puncak asing-masing dengan waktu retensi (tR) adalah 4,2; 6,9; dan 10,4 menit. Senyawa fragarance yang diduga berturut-turut adalah feniletil alkohol, indol, dan alfa-farnesen.  Selanjutnya terdeteksi pula senyawa golongan ester yaitu etil palmitat, etil oleat, dan etil stearat  dengan waktu retensi adalah  18,1; 20,4; dan 20,7 menit.   ABSTRACT: Enfleurage extraction can be optimized by varying the ratio of fat and Bintaro flower and extraction time. The aims of this study were to determine the optimal extraction and identify kind of compounds in fragrances of Bintaro flowers. Enfleurage extraction optimization was done by varying the ratio of fat and Bintaro flower and extraction time. Identification of compounds in the fragrances of Bintaro flowers was performed using Gas Chromatography-Mass Spectrometry (GC-MS). Optimal ratio of fat and Bintaro flower and optimal extraction time were 3: 21 (w / w) and 48 hours. Fragrance compound in Bintaro flower show three peaks with retention time (tR) 4,2; 6,9; and 10,4 minutes. The fragrance compound are allegedly phenylethyl alcohol, indole, and alpha farnesene. Ester compounds which are ethyl palmitate, ethyl oleate, and ethyl stearate, are detected as well with retention Time 18,1; 20,4; and 20,7 minutes.  
AKTIVITAS ANTIOKSIDAN SENYAWA FLAVONOID EKSTRAK ETANOL BIJI TERONG BELANDA (Solanum betaceum, syn) DALAM MENGHAMBAT REAKSI PEROKSIDASI LEMAK PADA PLASMA DARAH TIKUS WISTAR Ni Wayan Oktarini A.C.Dewi; Ni Made Puspawati; I Made Dira Swantara; Ida Ayu Raka Astiti Asih; Wiwik Susana Rita
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 2 No 1 (2014)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK : Penelitian ini bertujuan untuk mengetahui aktivitas antioksidan dari biji terong belanda dalam menghambat reaksi peroksidasi lemak plasma darah pada tikus dan menentukan golongan flavonoid yang aktif sebagai antioksidan. Uji aktivitas antioksidan dilakukan dengan metode DPPH dan pengukuran kadar MDA darah tikus Wistar. Partisi ekstrak etanol biji menghasilkan fraksi n-heksan, etil asetat, dan n-butanol. Fraksi etil asetat dan n-butanol positif mengandung senyawa flavonoid. Uji aktivitas antioksidan menggunakan metode DPPH menunjukkan bahwa fraksi etil asetat memiliki aktivitas antioksidan lebih besar dengan nilai IC50 1162,608 ppm. Fraksi etil asetat dipisahkan dengan kromatografi kolom menggunakan eluen n-heksan:etil asetat:n-butanol (6:4:0,1), diperoleh dua fraksi (Fraksi A dan fraksi B). Analisis dengan spektroskopi inframerah menunjukkan bahwa kedua isolat diduga mengandung gugus fungsi yang sama (OH, CH, C=O, C=C aromatik, C-O, CH alifatik. Analisis dengan spektroskopi UV-Vis diindikasikan bahwa fraksi A merupakan golongan dihidroflavonol dengan gugus hidroksi pada cincin A yaitu pada atom C-6, C-7 atau C-7, C-8 dan fraksi B merupakan golongan flavanon dengan gugus hidroksi pada cincin A yaitu pada atol C-7 dan C-8. Hasil analisis statistik pada pengukuran kadar MDA darah tikus Wistar menunjukkan bahwa fraksi etil asetat dengan dosis 200 mg/kgBB mampu menurunkan kadar MDA darah tikus Wistar yang diberi aktivitas fisik maksimal. Kata kunci : Solanum betaceum, syn, malondialdehid, peroksidasi lemak, flavonoid ABSTRACT : The aims of this study are to determine the antioxidant activity of flavonoid compounds extracted from  Dutch eggplant seeds in inhibiting lipid peroxidation reactions in the Wistar rat blood plasma and to determine the active flavonoid compounds as antioxidants. The test of antioxidant activity was carried out with DPPH (diphenilpikril hidrazil) method and measurment of MDA (malondialdehyde) level of blood of the Wistar rats. The ethanol extract with partitioned with n-hexane, ethyl acetat, and n-butanol. Fractions of ethyl acetate and n-butanol positively contain flavonoids. The test of antioxidant activity by DPPH method showed that the ethyl acetate fraction had strong antioxidant activity with IC50 value of 1162.608 ppm. Further, ethyl acetate fraction was separated by column chromatography using the mixture of n – hexane, ethyl acetate, water eluent ( 6:4:0,1 ) and it was obtained two fractions (named as fraction A and B). The analysis by infrared spectroscopy showed that the two isolates were suspected to be having similar functional groups (OH, CH, C=O, C=C aromatic, C-O and CH aliphatic). Analysis by UV-Vis spectroscopy indicated that fraction A was dihydroflavonol containing hydroxyl group on ring A located at C-6 and C-7 or C-7 and C-8 while the fraction B was flavanon containing hydroxyl group on ring A located at of C-7 and C-8. Statistic analysis of MDA level of the Wistar rat blood plasma showed a significant effect on MDA level where the dose of 200 mg/kgBW of the ethyl acetate fraction could decrease the MDA level of the Wistar rats blood plasma after they were forced to do maximum physical activities.
SINTESIS DAN KARAKTERISASI ARANG DARI LIMBAH BAMBU DENGAN AKTIVATOR ZnCl2 Manuntun Manurung; Oka Ratnayani; Rizgyandhaka Artha Prawira
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 7 No 1 (2019): Volume 7, Nomor 1, 2019
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Bambu merupakan salah satu bahan baku pembuatan arang yang dapat diaktivasi secara fisika atau kimia untuk menghasilkan arang aktif. Tujuan dari penelitian ini adalah membuat dan mengkarakterisasi arang aktif dari limbah batang bambu dengan aktivator ZnCl2. Penelitian diawali dengan membuat arang bambu melalui karbonisasi pada suhu 650oC selama 90 menit. Kemudian arang diaktivasi dengan penambahan larutan ZnCl2 dengan berbagai konsentrasi. Hasil penelitian menunjukkan bahwa konsentrasi optimum aktivator ZnCl2 adalah 0,02 M. Arang aktif yang diperoleh memiliki kadar air 5,00%, kadar zat mudah menguap 6,00%, kadar abu 7,33%, kadar karbon 81,67 %, daya serap terhadap Iod 1091,426 mg/g, dan daya serap methylene blue 198,724 mg/g. Karakteristik ini telah memenuhi baku mutu SNI 06-3730-1995 tentang arang aktif teknis. Luas permukaan arang aktif sebesar 737,74 m2/g dan keasaman permukaannya sebesar 0,5122 mmol/g. Analisis gugus fungsi terhadap arang aktif menunjukkan adanya gugus fungsi O-H, karbonil, alkuna, dan ester. Kata kunci: aktivasi, karakterisasi, arang aktif, limbah bambu. ABSTRACT: Bamboo can be used as a raw material for making carbon that can be activated physically or chemically to get activated carbon. The purpose of this research was to synthesize and characterize activated carbon from bamboo stem waste by using ZnCl2 solution as activator. The research was started by preparing the bamboo carbon through carbonization at a temperature of 650oC for 90 minutes. Activation was carried out by adding ZnCl2 with various concentration ratios. The results showed that the optimum concentration of ZnCl2 activator was 0.02 M. The activated carbon had a moisture content of 5.00%, volatile substance of 6.00%, ash content of 7.33%, carbon content of 81.67 %, iodine absorbtion capacity of 1091.426 mg/g, and methylene blue absorbtion capacity of 198.724 mg/g. These characteristics had met the SNI 06-3730-1995 standard about technical activated carbon. The surface area and surface acidity of this carbon was of 737.74m2/g and 0.5122 mmol/g respectively. The functional group analysis of the activated carbon showed the presence of O-H, carbonyls, alkynes, and esthers.
PENGARUH PEMBERIAN EKSTRAK ETANOL DAUN UBI JALAR UNGU (Ipomea batatas L.) TERHADAP PENURUNAN KADAR MALONDIALDEHID (MDA) PADA TIKUS WISTAR YANG MENGKONSUMSI ARAK Ni Putu Widya Astuti; I Putu Darma Wijaya; I Ketut Tunas
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Vol 5 No 2 (2017)
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

ABSTRAK: Pengembangan ubi jalar ungu (Ipomea batatas L.)sebagai pangan fungsional banyak dilakukan di Indonesia. Sedangkan pemanfaatan daun ubi jalar ungu belum banyak digunakan dan hanya sebagai limbah hasil pertanian. Telah dilakukan penelitian tentang aktivitas antioksidan dari daun ubi jalar ungu. Daun ubi jalar ungu mempunyai metabolit sekunder yang berfungsi sebagai antioksidan. Salah satu manfaat dari senyawa antioksidan yaitu untuk meredam radikal bebas yang disebabkan oleh stres oksidatif. Stres oksidatif dapat ditimbulkan dari mengkonsumsi minuman beralkohol. Arak merupakan minuman beralkohol khas dari Bali dan digunakan dalam upacara keagamaan. Tujuan penelitian ini yaitu untuk mengetahui pengaruh pemberian ekstrak daun ubi jalar ungu dalam menurunkan kadar MDA pada tikus wistar yang mengkonsumsi arak. Penelitian menggunakan penelitian eksperimental dengan menggunakan rancangan Pre-test Post-tes kontrol Group Desain. Setiap kelompok diberika arak selama 14 hari dan dihari berikutya diberikan ekstrak etanol daun ubi jalar ungu dengan dosis 50 mg/kg BB (P1), 75 mg/kg BB (P2) dan 100 mg/kg BB (P3). Hasil penelitian menunjukkan adanya pengaruh pemberian ekstrak etanol daun ubi jalar ungu pada pemberian 50, 75 dan 100 mg/kg BB ekstrak dengan p < 0,05. ABSTACT: The development of purple sweet potato (Ipomea batatas L.) as a functional food is mostly done in Indonesia. While the utilization of purple sweet potato leaves has not been widely used and only considered as agricultural waste. There has been several research on the antioxidant activity of purple sweet potato leaves. The purple sweet potato leaves have secondary metabolites function as antioxidants. One of the benefits of antioxidant compounds is to reduce free radicals caused by oxidative stress. Oxidative stress can be generated from consuming alcoholic beverages. Arak or palm wine is a typical alcoholic beverage from Bali and commonly used in religious ceremonies. The purpose of this study was to determine the effect of purple sweet potato extracts in reducing levels of MDA in wistar rats that consumed arak. Experimental study was applied in this research using the design of Pre-test Post-control Group Design tests. Each group was given arak for 14 days and the following day the purple sweet potato ethanol extract was given with doses of 50 mg / kg BW (P1), 75 mg / kg BW (P2) and 100 mg / kg BW (P3). The results showed that thre was an effect of ethanol extract of purple sweet potato leaves on the administration of 50, 75 and 100 mg/kg BW extract respectively with p <0,05.
PENENTUAN KANDUNGAN LOGAM Cd DAN Cu DALAM PRODUK IKAN KEMASAN KALENG SECARA SPEKTROFOTOMETRI SERAPAN ATOM (SSA) Hellna Tehubijuluw; Eirene.G. Fransina; Semuel Simra Pada
CAKRA KIMIA (Indonesian E-Journal of Applied Chemistry) Volume 1, No. 1, 2013
Publisher : Magister Program of Applied Chemistry, Udayana University, Bali-INDONESIA

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Abstract

Determination of cadmium and copper concentration of canned fish have been done. Some canned fished were taken away from three mercks circulating in a market and marked as RS (the 1st sample), NF(2nd sample), and CP(3rd sample). The aim of this research is to determine of  cadmium (Cd) and copper (Cu) content of canned fish and to compare the content with the standard limit regulated by the Directorate General of Drug and Food Control No: 03725/B/SK/VII/89. Determination of metal concentration was conducted using  atomic absorption spectrophotometer (AAS). It was found that Cd concentrations of RS and  NF samples are 0.1969 mg/kg and0.0448 mg/kg, respecively while for  CP it was not detected. For Cu concentrations of  RS, NF, and CP are 3.3303 mg/kg, 4.6130 mg/kg, 3.3047 mg/kg  respectively. The results indicated that the samples of the canned fishes  have been contaminated with Cd and Cu metals although the levels of those metals are still lower than  the maximum limit regulated by the Directorate General of Drug and Food Control No: 03725/B/SK/VII/89 where the maximum limit for Cd and  Cu are 0,2 mg.kg and 5.0 mg/kg respectively.    

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