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INDONESIA
Jurnal Kimia Terapan Indonesia
Published by Lembaga Ilmu Pengetahuan Indonesia
ISSN : 08532788     EISSN : 25277669     DOI : -
Core Subject : Science, Engineering,
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Materials Science & Nanotechnology
Arjuna Subject : -
Articles 8 Documents
 1 
Search results for , issue "Vol 15, No 1 (2013)" : 8 Documents clear
KARAKTERISTISASI DAN UJI HOMOGENITAS KANDIDAT BAHAN ACUAN BUFER FTALAT DAN BUFER FOSFAT UNTUK PENGUKURAN DERAJAT KEASAMAN Sujarwo Sujarwo; Nuryatini Nuryatini
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3696.34 KB) | DOI: 10.14203/jkti.v15i1.98

Abstract

Measurement of pH is closely related to everyday life,such as in the area of environment, food and beverage,pharmaceuticals, and even metabolism process in humanbody. To ensure the quality of pH measurement, pH metershould be calibrated regularly and checked each time beforeused. Calibration and performance checking of pH meterrequires traceable standard. The standard should be linked toCRM (Certified Reference Materials). Research Center forChemistry - Indonesian Institute of Sciencesas the technicallaboratory in Indonesia for metrology in chemistry isconducting research in developing reference materials for pHmeasurement. The reference materials are phthalate andphosphate buffer withthe value of pH were 4.00±O.OJ and6.86±O. OJ, respectively at 95% confidence level (k=2).Homogenity study was evaluated based on F-test and theresults indicated that both reference materials candidate werehomogeneous.Keywords: Reference materials, CRM,phthalate buffer,phosphatebuffer,uncertainty,homogeneity.
UJI KINERJA KATALIS Cu-ZnO/AI2O3 YANG DIPREPARASI DENGAN METODE KOPRESIPITASI UNTUK KONVERSI GLISEROL MENJADI PROPANADIOL R. Sarwono; K. C. Sembiring; D. S. Kusuma; S. Tursiloadi
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4605.799 KB) | DOI: 10.14203/jkti.v15i1.104

Abstract

Glycerolis the side product of esterificationprocess of edible oil into ester which is called as biodiesel. Conversion of glycerol into propanediol (PDO) involved many steps of reactions. Dehydration of Glycerol to 3- hydroxypropanalisstarted by breaking c-o bond, continued by hydrogenation reaction of 3-hydroxypropanal to produce 1,3-PDO. If the dehydration result of glycerol is acetol, the hydrogenation of acetol will produce 1,2-PDo. The dehydration reaction is depend on the strength of catalyst acidity or metalion Cu;itwill enhance the reactionselectivity toproduce 1,2 or 1,3-PDO. The strength ofCu-ZnO/A1203 catalyst prepared by coprecipitation method is 2.8 mmollgram. The glycerol conversion is almost 100% with 1,2-PDO as the main product and no 1,3-PDO wasobtained.Keywords: glicerol, co-precipitaion, catalyst, dehydration,PDO
PENGEMBANGAN DAN VALIDASI METODE KROMATOGRAFI LAPIS TIPIS DENSITOMETRI UNTUK PENETAPAN KADAR TEOFILIN DAN EFEDRIN HIDROKLORIDA SECARA SIMULTAN PADA SEDIAAN TABLET Lestyo Wulandari; Yuni Retnaningtyas; Diyanul Mustafidah
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4325.02 KB) | DOI: 10.14203/jkti.v15i1.100

Abstract

The combination of Theophylline and Ephedrine isoften used to induce an additive effect in alleviating thesymptoms of respiratory disorders. This research is aimed todevelop a Thin Layer Chromatography (TLC) densitometrymethodfor the simultaneous determination of Theophyllineand Ephedrine hydrochloride in tablet dosage form. Themethod employed TLC aluminium plates precoated withsilica gel 60F254 as the stationary phase and the mixture ofethyl acetate: glacial acetic acid: aquabidest (11: 5 : 1 v/v)asthe eluen system. For detection of Ephedrinehydrochloride, the TLC plate must be re-eluted with 0,5%ninhydrin solution in aquabidest, and then heated at 105°Cfor 15 min. Quantitative evaluation was performed bymeasuring the absorbance-reflectance of the analyte spot at279 nm and 505 nm for Theophylline and Ephedrinehydrochloride, respectively. validation of the method showthat TLC Densitometryis selective and specific,showed agood linearity, precise, and accurate and can be used forroutine analysis of tablet in industrial quality controllaboratories.Keywords:TLCDensitometryV, alidationT, heophyllineE, phedrinehydrochloride
SINTESIS DAN KARAKTERISASI NANOKOMPOSIT KONDUKTIF NANOFIBER Muhamad Nasir
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/jkti.v15i1.105

Abstract

Conductive composite polyanilinelPVDF nanofiberhas been synthesized by using co-axial electro spinning.Morphology and diameter of nanofiber was influenced byPVDF polymer concentration and the type of solvent. Beadednanofiberwas formed at lower polymer concentration. On thecontrary, free beaded nanofiber was formed at higherpolymer concentration. Result of FTIR analysis showed thatPVDF crystal structure was dominant by p-phase crystalstructure. Conductive composite nanofiber has potentialapplication in sensor, actuator and airfilter.Keywords: Conductive composite nanofiber, co-axialelectrospinning, polyaniline/pvdf compositenanofiber
SITOTOKSISITAS XANTHORRHIZOL dari MINYAK ATSIRI RIMPANG Curcuma xanthorrhizaRoxb. terhadap SEL KANKER PAYUDARA YBM-1 Zalinar Udin
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4649.3 KB) | DOI: 10.14203/jkti.v15i1.101

Abstract

Curcuma xanthorrhiza Roxb. (temulawak) known hascytotoxic activity against cancel cells. The active compoundofCurcuma xanthorrhizaRoxb., for several cancer cells isxanthorrhizole. This research would assay the cytotoxicactivity of volatile oil from Curcuma xanthorrhizaRoxb. 'srhizome toward YMB-1 breast cancer cell. The method wasdone by in-vitro with alamar blue dyed, and measuredtheabsorbance to observe the viability (%) of cell and IC,ovalue. Xanthorrhizole used in this research was isolate fromethyl acetate fraction of Curcuma xanthorrhizaRoxb. 'srhizome compared the result with pure xanthorrhizol . Thecytotoxic activity assay toward YMB-1 cell showed thatxantorrhizole has highest activity with ICso 2.88 glmL,followed by the volatile oil with IC,o 3.20 glmL.lt meansthatactivity of volatile oil was not significantly different comparedwith that of xanthorrhizole . The lowest activity was found onisolate C27 with ICso 4.80 g/ml, while antimycin as positivecontrol gave IC,o 1.03 glmL..Keywords: Curcumaxanthorrhiza Roxb., volatile oil,xanthorrhizol,breast cancer,YMB-1cell, alamar blue method
DOCKING MOLEKUL DENGAN METODA MOLEGRO VIRTUAL DOCKER DARI EKSTRAK AIR Psidium guajava, Linn DAN Citrus sinensis, Peels SEBAGAI INHIBITOR PADA TIROSINASE UNTUK PEMUTIH KULIT Ayik Rosita Puspaningtyas
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (6980.057 KB) | DOI: 10.14203/jkti.v15i1.102

Abstract

We have been molecular docking using MolegroVirtual Docker (MVD) on water extract of guava fruit(Psidiumguajava, Linn) and sweet orange (Citrussinensis,Peels) as inhibitor on enzyme tyrosinase withascorbic acid (vitamin C) as positive control to studywhitening agent. Based on the previous studies, the maincontent of the water extract of guava fruit (Psidiumguajava)are 2,6-dihydroxy-3,5-dimethyl-4-0--D-glucopyranosilbenzophenone, 3-hydroxy-2-butanone, and vitamin C, whilethe extract juice of sweet oranges (Citrus sinensis) arelimonene, linalol, and vitamin C. In this study the resultsshowed that the main content of the water extract of Psidiumguajava fruit have better bond as inhibitor on tyrosinase thanCitrus sinensis and vitamin C which can be seen fromMoldock score of Psidiumguajava (-107.806) and Citrussinensis (-76,9593); it meanslower the energyand morestable binding. The IC50 on water extract of guava fruit(psidiumguajava) and sweet orange (Citrus sinensis) were0.26 mM and 31.07 mM, respectively. The hydrogen bonds of2, 6-dihydroxy-3, 5-dimethyl-4-0--D- glucopyranosilbenzophenone with 5amino acid of tyrosinase were Gly 200,Pro 201 , Gly 196, Phe 197, and Asn 205, while limonen,linalool binding 3 amino acids were Gly 200, Phe 197, andAsn 205. Finally, 3D MVD visualization between maincontent of guava and sweet orange water extract can beconcluded that interaction of guava fruit (psidiumguajava)water extract against tyrosinase was more harmonious andstabil than vitamin C and main content of sweet orange(Citrus sinensis) water extract.Keywords: Psidium guajava, Citrus sinensis, tyrosinase, vitamin Cand docking molecule
ISOLASI DAN PEMURNIAN WEDELOLAKTON DARI TUMBUHAN URANG ARING (Eclipta alba L. Hassk) Trisna Yuliana
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4329.628 KB) | DOI: 10.14203/jkti.v15i1.97

Abstract

Wedelolactone has a wide range of biological activities and used for the-treatment of various ailment. In the present study an experiment of isolation method of wedelolactone from Eclipta alba L. Hassk plant has been developed by conventional process using maceration method, partitions, and column chromatography and the result was characterized by NMR, UV- Vis and mass spectroscopy. The experimental results showed that the process of isolation isproduce wedelolactone with94% purity which are expected to be used as a standard.
APLlKASI KALSIUM KLORIDA DAN ETHEPHON DALAM UPAYA PENINGKATAN KUALITAS BUAH NANAS (Ananas comosus (L) Merr) Nungki Kusuma Astuti; Moch Dawam Maghfoer; Roedy Soelistyono
Jurnal Kimia Terapan Indonesia Vol 15, No 1 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5521.557 KB) | DOI: 10.14203/jkti.v15i1.103

Abstract

The objective of research was to obtain the treatmenttime of CaCl2 applications, dosage of CaCl2 and ethephonapplications to improve the fruit quality of pineapple. Thisresearch used Split-Split Plot Design and each treatmentreplicated 3times. The main plot is time ofCaCl2 applicationsthat consists of three levels, those are 90 day after flowering(daf), 120 daf and twice of CaCl2 applications at 90 and 120daf The sub plot is dosage of CaCl2 that consists of threelevels, those are 50 kg ha', 75 kg ha' and 100 kg ha', The subsub plot is dosage of ethephon that consists of two levels,those areO L ha' and 2,5 L ha', The results showed that thecombined treatment ofCaCl2 application on 90 daf, dosage ofCaCl250 kg ha' and dosage of ethephon 2.5 L ha' producedistribution external fruit maturity level of 25% and 50%higher than the other treatments. Combined treatment twiceof CaCl2 application on 90 and 120 daf with dosage of CaCl2100 kg ha' produces calcium content higher than the othertreatment and produce fruit texture, percentage of fruitdiseases and percentage of fruit bruised lower than othertreatments. Ethephon application had noeffect on calciumcontent but decreasing fruit texture, percentage of fruitdiseases and improved percentage offruit bruised. CaCl2 andethephonapplications didnot affect the total soluble solid,total acidity and vitamin C. .Keywords: CaCl2, ethephon, pineapple, fruit quality.

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