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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 6 Documents

Search results for , issue "Vol 19, No 1 (2017)" : 6 Documents clear

Preparation of Alkyl Halide as Intermediate Compound in Synthesis Cationic Surfactant Alkyl Trimethyl Ammonium Chloride Asdani Muatika Sari; Ani Suryani; Puspa Dewi Lotulung; Silvester Tursiloadi
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

Cationic surfactant alkyl trimethyl ammonium chloride was synthesized by quartenerisation of tertiary amines. Materials used in quartenerization are tertiary amine and alkyl halide. Alkyl halide is a hydrocarbon derivative in which one or more hydrogen is replaced with halogen. In this research, thionyl chloride is used as a reactant . Thionyl chloride (SOCl2) is often used because it is easier to make, the yield is greater and byproducts are volatile. Alkyl halide is synthesized from the reaction of hexadecyl alcohol with thionyl chloride (SOCl2) at a temperature of 80 ° C for 24 hours in a reflux reactor. This study managed to get hexadecyl chloride from the reaction hexadecyl alcohol and thionyl chloride. It can be seen from the results of FTIR, LC/MS and GC/MS

Synthesis and cytotoxicity assay using Brine Shrimp Lethality Test of Cinchonidine Isobutyrate Ester Mario Mario; Puspa Dewi Lotulung; Gian Primahana; Sylvia Rizky Prima; Muhammad Hanafi
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

This research was aimed to synthesize cinchonidine isobutyrate ester and conduct a preliminary assay for anticancer agent using cytotoxicity assay to Artemia salina Leach larva, or also known as brine shrimp lethality test (BSLT). Cinchonidine, a compound that has quinoline rings and quiniclidine ring, is a quinine analogue and stereoisomer of cinchonine. Cinchonidine is predicted to have anticancer activity. Synthesized ester was aimed to gain higher lipophilicity. Higher lipophilicity makes it easier for the compund to pass through cell membrane. The esterification process used DMAP as a catalyst, DCC as an activator, and isobutyric acid as a carboxilyc acid. Isobutyric acid is a type of short chained fatty acid that usually acts as an anticancer prodrugs. The product is identified by ESI-MS, FT-IR, 1H-NMR, dan 13C-NMR. Ester cinchonidine isobutyrate is gelatinous and colourless with yield of 21,77%. BSLT result showed that cinchonidine isobutyrate ester had LC50 value of 75.16 ppm which was more toxic than cinchonidine that had LC50 value of 99.2 ppm. It was proved that higher lipophilicity could increase pharmacology activity

Effect of Combining Electron Beam Irradiation and Alkaline Pretreatments of OPEFB for Enzymatic Hydrolysis and Fermentation of Ethanol Deliana Dahnum; Vera Barlianti; Kiky C. Sembiring; Anis Kristiani; Muryanto Muryanto; Yanni Sudiyani
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

The effect of pretreatment process from the combination of electron beam irradiation and alkaline to Oil Palm Empty Fruit Bunch (OPEFB) was studied. The combination of pretreatment method was considered as an alternative way to increase glucose yield. In this study, OPEFB was pretreated using Electron Beam Irradiation (EBI) at 100 kGy and 300 kGy and followed by chemical pretreatment. In chemical pretreatment, irradiated OPEFB was reacted with sodium hydroxide 6% and 10% in stirred vessel at 4 bars and 150 oC for 30 min. The effectiveness of pretreatment was evaluated by calculating the composition of chemical component using National Renewable Energy Laboratory (NREL) Method. The samples which were hydrolyzed using enzymes with the addition of 30 FPU of Cellic®CTec2 per gram of pretreated biomass resulted high glucose in the amount of 9.86%. The fermentation process using Saccharomyces cereviceae obtained the highest ethanol concentration for 5.36% at 72h. The combination of the two pretreatment methods gave an effect on the weight loss, chemical composition, structure, and enzymatic hydrolysis product

The Influence of Poly(Lactic Acid) Addition to Thermal Properties of the Blended Polypropylene for Food Packaging Materials Achmad Hanafi Setiawan; Sanjaya Sanjaya; Fauzan Aulia
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

The commonly used food packaging materials are made from synthetic polymers derived from petroleum. However, the use of synthetic polymers has negative impacts on the environment, because it is difficult to degrade naturally either by the biotic or abiotic process. Although their complete replacement with eco-friendly packaging films is just impossible to achieve economically, at least for a specific application like food packaging the use of bioplastics should be the future. One of the alternatives is to blend synthetic polymer for instance polypropylene (PP) with a natural polymer like poly-lactic acid (PLA). Because their mixture is an immiscible blend because they have highly different polarity, it is necessary to add a compatibilizer such as polypropylene-grafted maleic anhydride (PP-g-MAH) in order to increase the properties of its blend miscibility. The objective of this research was to study the influence of PLA addition to the thermal properties of their blend product with PP. The combinations of PP with PLA in the ratios of (80:20); (90:10); (95:5) were prepared and then characterized for their thermal property behaviour by means of TG and DSC. The results showed that increasing the amount of PLA will decrease their enthalpy significantly

Isolation and Structure Determination of Antioxidants Active Compounds from Ethyl Acetate Extract of Heartwood Namnam (Cynometra cauliflora L.) Dede Sukandar; Siti Nurbayti; Tarso Rudiana; Tsalats Wahyul Husna
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

Active compounds with antioxidant activity were isolated from ethyl acetate extract of namnam stem (C. cauliflora L.) that had undergone maceration and fractionation by gravity column chromatography. The compounds were later identified by by using UV-Vis Spectrophotometry, FTIR, LCMS and 1H-NMR. Ethyl acetate extract of namnam stem showed considerably high antioxidant activity (IC50 value 4.68 Â± 0.035 ppm). The results of analysis by UV-Vis and FTIR showed carbonyl group conjugated with an aromatic ring at band I (Î»max 330.22 nm), chromophore group of alkene (C=C) at band II (Î»max 268.67 nm) and functional groups such as Oâˆ’H (3343.91 cm-1), C=O (1729.23 cm-1), C=C (1652.64 and 1611.99 cm-1), Câˆ’O (1269.89) and Câˆ’H ortho (738.23 cm-1). LCMS (m/z 270.9246) and 1H-NMR data showed seven proton signals on the aromatic ring at carbon position C-3 at Î´H 6.86 ppm (1H, s), C-6 at Î´H 5.95 ppm (1H, d, J=1.95 Hz), C-8 at Î´H 6.25 ppm (1H, d, J= 1.95 Hz), C-2â€™ and C-6â€™ at Î´H 7.03 ppm (2H, d, J=7.87 Hz), C-3â€™ and C-5â€™ at Î´H 6.87 ppm (2H, d, J= 7.87 Hz) so that the structure was identified as a flavonoid which was 4 ', 5,7-trihydroxy-flavones or known as apigenin. The isolated apigenin had very strong antioxidant activity, as shown by IC50 value of 5.18 Â± 0.014 ppm.

Evaluation of Uncertainty in the Determination of Pesticide Residues in Tea using GC-ECD Yohanes Susanto Ridwan; Andreas Andreas; Dyah Styarini; Retno Yusiasih
Jurnal Kimia Terapan Indonesia Vol 19, No 1 (2017)
Publisher : Research Center for Chemistry - LIPI

Key indicator of quality in test results is the uncertainty value, which could be evaluated using several common approach. Uncertainty evaluation in a-endosulfan and bifenthrin in Oolong tea, and cypermethrin in green tea using bottom-up approach showed that uncertainty component arising from GC-ECD instrument calibration, method performance i.e. repeatability and recovery were the main contributors to total uncertainty. Uncertainty component arising from weighing, dilution factor, stock standard solution, calibration solution, and moisture correction had no significant effect to total uncertainty, hence they could be neglected. Relative standard uncertainty obtained for all of pesticides residue were 18.23, 10.44, dan 14.98% for a-endosulfan, bifenthrin, and cypermethrin, respectively. Comparison with 2/3 CV Horwitz of 17.33, 10.62, and 12.44% respectively for all pesticide residues indicated that the evaluation of uncertainties were realistic

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