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Jurnal Kimia Terapan Indonesia

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Published by Lembaga Ilmu Pengetahuan Indonesia

ISSN : 08532788 EISSN : 25277669 DOI : -

Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology

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Articles 283 Documents

15 16 17 18 19

PEMANFAATAN SISTEM MICROBIAL FUEL CELL DALAM MENGHASILKAN LISTRIK PADA PENGOLAHAN AIR LIMBAH INDUSTRI PANGAN Herlian E. Putra; Dani Permana; Agusta S. Putra; Djaenudin Djaenudin; Hari R. Haryadi
Jurnal Kimia Terapan Indonesia Vol 14, No 2 (2012)
Publisher : Research Center for Chemistry - LIPI

Microbial Fuel Cell (MFC) dapat langsung menghasilkan listrik dari oksidasi bahan organik yangterkandung dalam suatu larutan. Dibutuhkan suatu optimalisasi sistem MFC yang mencakup beberapa faktoruntuk meningkatkan hasil listrik seperti jenis media penukar kation, elektroda, luas permukaan elektroda, dandurasi reaksi. Penelitian dilakukan untuk melihat kinerja sistem MFC pada pengolahan air limbah industripangan, dalam hal ini tahu dan cucian beras (catering), dengan menggunakan tembaga sebagai elektroda, membran Poli Eter Eter Keton Tersulfonasi (SPEEK) sebagai media penukar kation, dan menggunakan mediasubstrat limbah. MFC diamati selama 80 jam. Pengukuran tegangan yang dihasilkan dilakukan setiap 4 jam.Tegangan maksimum yang dihasilkan pada media limbah tahu mencapai 80 mV (pada jam ke-28). Selama 52jam berikutnya, tegangan sedikit menurun. Sedangkan pada air limbah cucian beras, tegangan maksimum terjadipada jam ke-60 yaitu 234 mV. Selama proses 80 jam, melalui sistem MFC pada media limbah tahu, CODmampu turun 49,33% dari 6750 mg/L menjadi 3420 mg/L. Sedangkan pada limbah cucian beras, COD turundari 18840 mg/L menjadi 10560 mg/L atau sebesar 43,95 % selama 80 jam.Kata Kunci: Microbial Fuel Cell, listrik, limbah pangan.

UJI AKTIVITAS ANTIOKSIDAN EKSTRAK KASARAIR BUNGA KECOMBRANG (Etlingera elatior) SEBAGAI BAHAN PANGAN FUNGSIONAL Dede Sukandar; Nani Radiastutu; Ira Jayanegara; Anna Muawanah; Adeng Hudaya
Jurnal Kimia Terapan Indonesia Vol 13, No 1 (2011)
Publisher : Research Center for Chemistry - LIPI

A research of antioksidant activity from water crude extract of kecombrang flower (Etlingera elatior) have been reported. This Research aim to give erudite evidence of kecombrang flower as a functional food. Antioksidant was examined by activity diphenyl picryl hidrazyl ( DPPH) methode and chemicalcomponent analyses using GCMS. Water crude extract of kecombrang flower shows antioxidan activity ( ICso = 61. 6497 ppm) and waspredicted to have component of l-dodekanol, S-metil-l-oxo-lbuten 1-(21,41, 51-trihidroxyl phenil} and 1tetradecene (tR= 13,26, area=6,03, similarity at 98%).Keyword: Kecombrang ( Etlingera elatior), functional food, antioxidant

PENGARUH 1,4-BUTANDIOL SEBAGAI POLIOL PADA MODIFIKASI EPOKSI MENGGUNAKAN POLIURETAN Muhammad Ghozali; Agus Haryono; Asep Handaya Saputra; Evi Triwulandari
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Corrosion is a natural phenomenon causing degradation value and function of material. The use of paints and polymer coatings is the most popular method to protect material against corrosion. Polymer coatings used was an epoxy-based organic resin and polyurethane. Generally, those coating materials were used separately. This study carried out the modification of epoxy with polyurethane in order to obtain coating materials as a combination of epoxy and polyurethane. Expectedly, the chemical reaction between epoxy coating-material and polyurethane could improve the characteristics of the obtained coating materials. Synthesis of polyurethane-modified epoxy with 1,4-butanediol as the polyol (ETP-BTD) was conducted by reacting epoxy resin, tolonate and 1,4-butanediol simultaneously at 50 oC for 30 min with dibutyltindilaurate as catalyst. Functional group analysis of ETP-BTD was performed by Fourier Transform Infra Red (FTIR), tensile strength by Ultimate Testing Machine (UTM), adhesion by ASTM D4541 Portable Pull-off Adhesion Testers, water vapor transmission rate by ASTM E96 Desiccant Method and thermal stability was studied using Thermogravimetric Analysis (TGA). The FTIR analysis results showed that there are urethane bonds at 1716-1690 cm-1. These results showed that modification of epoxy using polyurethane increased the tensile strength and adhesion, and also decreased the water vapor transmission rate of epoxy.Â Keywords: epoxy, modification, polyol, polyurethane, 1.4-butanediol

KARAKTERISASI PHARSIAL ISOLATBAKTERI PENDEGRADASI PHENOL DARI TABLET BAKTERI T. Sembiring; A. Susilorukmi
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

An aerobic pure culture (18) was isolated from the tablet of mixed culture bacteria which is originated from a farm land. The gram positive isolate able to degrade phenol about 550 mg/l.d. Morphology of the isolate changes with the culture ages. it was in rod shape during the logarithmic growth phase and changes to the o valform during the stationary phase. The range of temprature growth is 27-34°C and the optimum temprature of the isolate is 30°C with doubling time about 7 hours. Substrate could be utilized by the isolate are alcohol, aromatic compound and carbohydrate. Methanol, ethanol, isopropanol (each 10%; v/v), 4-Chlor phenol (0.2 mM), 4-nitrophenol(0.25 mM), anniline (1 mM) and glucose are some substrate has been tested for the bacterial growing. Salt (NaCl) tolerance for the isolate is up to 2% (v/v) and the addition of ammonium salt would be support the bacterial growthKey words:Bacterial tablet, aerobic, phenol degradation, 4-chlor phenol, 4-nitro phenol, anniline, glucose, methanol, ethanol, iso-propanol, isolation, partial characterization.

SUSUNAN PENGELOLA JKTI editor .
Jurnal Kimia Terapan Indonesia Vol 14, No 2 (2012)
Publisher : Research Center for Chemistry - LIPI

SYNTHESIS AND PROPERTIES OF ETHOXYLATED GLYCEROL MONOOLEATE AS PALM OIL BASED NONIONIC SURFACTANTS Indri Badria Adilina; Egi Agustian; Yenny Meliana; Anny Sulaswatty
Jurnal Kimia Terapan Indonesia Vol 17, No 1 (2015)
Publisher : Research Center for Chemistry - LIPI

Palm oil based nonionic surfactants were synthesized by reacting glycerol monooleate with ethylene oxide at 80 ÂºC in the prescence of an alkaline catalyst. Purification of the products was conducted by use of acetic acid and black carbon which gave ethoxylated products (EGMO) with a higher level of viscocity and greater solubility in water. Physical and chemical properties of the product such as surface activity, cloud point, acid value, ester value, hydroxyl value, and hydrophilic-lipophilic balance was also determined and results varied depending on the reagent molar ratio. The synthesized EGMO were soluble in water and therefore show potential use as surface active agents in personal care and cosmetic products.Keywords:Â Â nonionic surfactant, ethoxylation, glycerol monooleate, palm oil

ELUSIDASI STRUKTUR MOLEKUL UK-3, UK-4 DAN UK-5, SENYAWA BIOAKTIF DARI Streptomyces sp. 517-02. Muhammad Hanafi
Jurnal Kimia Terapan Indonesia Vol 8, No 1-2 (1998)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v8i1-2.204

New potential antifungal antibiotics UK-2A, B, C and D were elucidated as nine membered dilactone derivatives, isolated from mycelial cake of an actinomycete strain 517-02. In the continuation of a screening program in order to discover other useful bioactive metabolites from the same microbial sources, a novel UK-3 and two known compounds of UK-4 and UK-5 have been isolated.The molecular structure of UK-3 was very similar to UK-2A, except thai UK-3 did not have any methoxy group (-OCH3) on pyridine at ('-4'. UK-4 and UK-5 were identified as kown compounds of isocoumarine. These structures were elucidated based on their spectral and chemical evidence.Biological activity assay, demonstrated that UK-3 was active as against to Saccharomyces cerevisiae, Aspergillus niger dan Neurosporo sitophila and inhibited growth of cancer cell, P-388, B-16, KB and COLO-201.

The Synthesis of Cinchonine Tiglat Ester Compound and Cytotoxic Test Against MCF-7 Breast Cancer Cell Ahmad Khanifudin; Gian Primahana; Sylvia Rizky Prima; Puspa Dewi Lotulung; Muhammad Hanafi
Jurnal Kimia Terapan Indonesia Vol 19, No 2 (2017)
Publisher : Research Center for Chemistry - LIPI

Cinchonine is a type of cinchona alkaloid compound commonly found and/or isolated from Cinchona sp. plant. It is commonly used to treat malaria, and can potentially be used against cancer cells. In this particular study, cinchonine ester derivatives were extracted through esterification processs. Synthesized esther is aimed to gain higher lipophilicity of cinchonine so that makes it easier to pass through cell membrane. Esterification was done using DCC activator as well as DMAP catalyst with tiglic acid used to create cinchonine tiglat. Subsequent cinchonine tiglat was obtained in the form of oil with 25,28% yield. The compound obtained from the synthesis was the analyzed using LC-ESI-MS and 1H-NMR spectroscopy instrumentation. Results show that the target compound has been successfully synthesized. Its cytotoxic ability against MCF-7 breast cancer cells was tested using the Alamar Blue method. Results concluded that cinchonine tiglat ester compound has a viable cytotoxic activity with IC50 value of 1.22 ppm.

ISOLATION AND ANTIBACTERIAL TEST OF GARLIC OIL A. T. Karossi; M. Hanafi; L. Sutedja
Jurnal Kimia Terapan Indonesia Vol 3, No 2 (1993)
Publisher : Research Center for Chemistry - LIPI

Garlic oil is known to have medicinal effect on hypertension, heart desease, anemia and various infections. The active principles are reported to be allicin, diallil disulfide, allilpropyl disulfide, scorduun, selenium and germanium in addition to the presence of anticoagulant, anuhaemolytic and arulthrombotic agents. The methods applied for isolation and other conditions during the isolation affect the yield or the compositions of the oil, for instance with steam distillation the allicin will decompose whereas extraction at room temperature will yield oil with allicin as the main component. In the present study isolation was conducted by extraction with ethylacetate or ethanol and the oil obtained was tested for their antibacterial capacity. Tests against Staphylococcus aureus, Bacillus cereus and Escherichia coli indicated that the isolated oil were active. On the other hand, commercial garlic extract (KGE) and garlic oil capsule (GOC) gave negative test. This may have been due to either insufficient concentration. of the biologically active component present in the commercial drugs or different method of extraction process. investigation with thin layer chromatography (TLC) of the drugs On silica gel plate ustngn-hexane and ethyl acetate as eluents showed six components in the GOC and none in KGE whereas for the isolated oil 13 components were identified with iodine vapour. Although the oils indicated antibacterial activity, it is somehow less active compared with oxytetracycline which is used as reference.

FERMENTASI NIRA SORGUM MANIS MENJADI ETANOL (ALCOHOLIC FERMENTATION OF SWEET SORGHUM JUICE) Aris Toharisman; Hendro Santoso
Jurnal Kimia Terapan Indonesia Vol 8, No 1-2 (1998)
Publisher : Research Center for Chemistry - LIPI

Sweet sorghum juice about 11-16% of total sugar, and so it could be potentially fermenled to produce ethanol. The concentrated juices were used as media for ethanol production in batch culture using Saccharomyces cerevisiae R5 at 30°C and pH 4.5. The ethanol yield (Yp/s ) and volumetric productivity during 48 hours of fermentation lime with 20.08%(x/v) initial sugar contents were 0.44 g.g-1 and O.18 g.1-1.h-1,respectively.Keywords : Alcholic fermentation, sweet sorghum juices, cane molasses, S. cerevisiae, and batch culture.

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