cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
-
Contact Email
-
Phone
-
Journal Mail Official
-
Editorial Address
-
Location
Kota adm. jakarta selatan,
Dki jakarta
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 283 Documents
 1   2   3   4   5 
PEMISAHAN KROMATOGRAFI PADA FASA TERIKAT DIOl Julia Kantasubrata
Jurnal Kimia Terapan Indonesia Vol 1, No 2 (1991)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2973.912 KB) | DOI: 10.14203/jkti.v1i2.302

Abstract

Chromatographic separation could not all be done on silica and alumina, therefore bonded phases have been developed by reacting organochiorosilane with the silanol group of silica. One of the new development of polar bonded phase is diol phase, which is prepared by reacting the silanol group of silica with GOX (glycidoxypropyttrimethoxysilane), Diol phase is widely applicated in TLC and normal phase HPLC. In -reversed phase HPLC, its application is limited, since with eluent containing water, it lasily swelled. Depending on the solute being separated, hidrogen bond,' electron density and basicity play an important role in the retentiop mechanism. Its application on TLC plate make it possible to be used in bidimensional analysis. The application of dial phase is also discussed, eitherfor the exclusion separation of solutes with large molecular weight or for the separation of simple organic compounds such as steroids with normal phase chromatography mechanism.
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.
HIDROGENOLISIS METILSIKLOPENTANA PADA KATALIS 0.3% Pt/Al2O3 Hery Haerudin
Jurnal Kimia Terapan Indonesia Vol 6, No 1-2 (1996)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4393.351 KB) | DOI: 10.14203/jkti.v6i1-2.235

Abstract

Hydrogenolysis of methylcyciopentane (MCP) was carried out with 0.3% Pt/Al2O3 catalyst at 210 °C and 235 °C in a batch reactor. Chemisorption of hydrogen and oxygen on the catalyst had also been measured. The mean value of platinum dispersion on the catalyst support measured by chemisorption technique was D = 84%. The product distribution of hydrogenolysis of MCP, namely n- hexane : 2- methylpentane : 3-methylpentane was found to be 15: 55: 30 at 210 DCand 20: 50: 30 at 235 °C. The adsorption of MCP molecule at the boundary area between the metal particle and the support material was assumed to be the determining factor for that distribution profile. The activation energy (Ea) of the hydrogenolysis of MCP on this catalyst was 95 kJ/mol.
PEMEKATAN PROTEIN DALAM SUSU DAN KECAP MENGGUNAKAN MEMBRAN SERAT BERONGGA Syahril Ahmad
Jurnal Kimia Terapan Indonesia Vol 11, No 1 (2009)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3332.525 KB) | DOI: 10.14203/jkti.v11i1.176

Abstract

Concentration of protein which found in freshmilk, sweet ketchup and salt ketchup have been done byusing hollow fiber polysulfone membrane with differentmolecular weight cut - off (MWCO). Membranes usedin these experiments have MWCO 66,000, 87,000 and 149,000 Dalton. Experimental were conducted bycontinues flow system and parameters observed in these experimental were protein, sugar and salt, respectively.Protein infresh milk rejected by membrane above 98 %,but all of sugar pass through to the permeate side. Forsweet ketchup feed sample, rejection coefficient towardsprotein was smaller than feed fresh milk. The higherrejection coefficientfor sweet ketchup was 48 % for themembrane with MWCO 66.000 Dalton. Rejectioncoefficient of membrane towards protein for salt ketchup sample was smaller than sweet ketchup sample. For saltketchup, the higher rejection coefficient towards proteinwas 27 % for the membrane with MWCO 66,000Dalton. Rejection coefficient of membrane towardsNaCl for feeding solution sweet ketchup and saltketchup were in the rlJ.1Jgefrom 8.74 to 23.96 %.Key words : Hollow fiber membrane, ultrafiltration, protein,milk, ketchup.
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
A LABORATORY STUDY OF FLUIDISED DRUM GRANULATION R. Sarwono
Jurnal Kimia Terapan Indonesia Vol 5, No 1 (1995)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4911.984 KB) | DOI: 10.14203/jkti.v5i1.240

Abstract

Performance study of laboratory scale Fluidised Drum Granulation (FDG) has been carried out using glass beads as model particles and melted wax as binder. The equipment was running well to coat the particle. The particle growth was simple, agglomerating or layering. Several process variables such as particle size, binder spray rate and amount of binder added, and drum speed were used to determine the unwanted agglomerate formation. The mass fraction of agglomerate formation increased sharply begin from initial particle size 3 mm to smaller. The transition size is 4 mm, there was virtually no agglomerate formation. Agglomerate formation also increased with' increasing binder spray rate, and varies little with drum speed and total amount of binder added.
PEMBUATAN ASPAL EMULSI YANG TAHAN-SIMPAN Leksminingsih Leksminingsih
Jurnal Kimia Terapan Indonesia Vol 10, No 1-2 (2000)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (4882.044 KB) | DOI: 10.14203/jkti.v10i1-2.181

Abstract

Cold Mixed Asphalt Emulsion generally used for roadmaintenance, such as film Slurry Seal to cover cracked roadsurface, Patching, Dense Graded Emulsion Mixed (DGEM) andOpen Graded Emulsion Mixed (OGEM) for road pavement.One of several obstacles using asphalt emulsion, is the shorttime of storage stability, less than three months. This problem hasan effect to road maintenance especially for District road thathave light traffic.Asphalt emulsion is made 0f: bitumen, kerosene, emulsifier,HCI, CaCl, and watel: Asphalt emulsion has pH of 2,5 to 4%.To mix the component of asphalt emulsion a Colloid Millequipment is used, which has a rotation of 1000 until 6000 rpm,and has a gap between rotor and stator of250 um unti/500 um,so the asphalt emulsion product has a particle > 250 ~Wl.To make a longer storage stability oj asphalt emulsion, usingtwo method s i.e:1. By experiment, to make various contents of asphalt emulsionbase materials and do the test using a standard test oj ASTMD 244-90 until six months.2. To make various contents of asphalt emulsion base materials,not only measure the rate stability by Stoke 'sformula, but alsoperform the test until six months.The result of method 1(1) the components of asphalt emulsionare: 65% of bitumen, 2,8% of kerosene, 0,48% of emulsifier.0,48% of HCI, 0,3% of CaCl, and 30,94% of water, after sixmonths the test result still hove comply with the spesijication ofAASHTO M 208.The result of method 2(2), the rate stabiliy have aroun d of18 x 10-7 until 35 x 10-7 cm/second,From ten formulas using method 2, three still stand until sixmonths. The selected formula was made in a drum, and was testeduntil six months.
PENENTUAN KONDISI OPTIMUM FERMENTASI PADAT Trichoderma hamatum PADA MEDIA TUMBUH DEDAK PADI DALAM PRODUKSI SELULASE MENGGUNAKAN RESPONSE SURFACE METHODOLOGY Teuku Beuna Bardant; Haznan Abimanyu; Putri Lili Epriyani
Jurnal Kimia Terapan Indonesia Vol 15, No 2 (2013)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5932.591 KB) | DOI: 10.14203/jkti.v15i2.109

Abstract

Optimum condition for solidfermentation of Trichoderma hamatum inrice bran in order to produce cellulase hadbeen studied by using Response Surfacemethodology (RSM). Fermentationcondition variables that observed waswater to rice bran ratio, urea andinoculums additions cellulase activity inFPU/gds (gram of dry solid) became theonly dependent variable. The result ofempirical equation from this study wasproven to be valid within water to ricebran ratio 0,5 - 0,7, urea and inoculumsaddition where 2-3 % and 1-2% of ricebran weight respactively. Maximumcellulase activity that can be obtain withinthese ranges was 4.99 ± 0.92 FPU/gds.Keywords: Cellulase, Trichodermahamatum, rice bran, solid fermentation
PREPARASI CONTOH UNTUK ANALISIS ASAM AMINO OARI BERBAGAI BAHANBERPROTEIN Sumardi Sumardi
Jurnal Kimia Terapan Indonesia Vol 5, No 1 (1995)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (7381.705 KB) | DOI: 10.14203/jkti.v5i1.247

Abstract

analysis results are discussed. The hydrolysis methods elaborated in this paper includes: (i) The use of 6N hydrochloric acid solution at 110 and 145°C for the analysis of most amino acids. (ii) The use of 6N hydrochloric acid solution after pre-hydro-lysis oxidation procedure using performic acid for methionine and cystine determination; (iii) The use of sodium hydroxide or barium hydroxide solutions for tryptophan determination. Both precision and accuracy of the analytical data resulted from the application of those hydrolysis methods are also discussed. It may be concluded that in order to be able to determine all of the amino acids in the sample, more than one hydrolysis procedure or sample preparation method have to be used.
ISOLASI SENYAWA ANTIOKSIDAN DALAM EKSTRAK HEKSANA KULIT BATANG MANGGIS HUTAN (Garcinia bancana Miq.) Sri Hartati; Masrukhan Masrukhan; Herry Cahyana
Jurnal Kimia Terapan Indonesia Vol 16, No 1 (2014)
Publisher : Research Center for Chemistry - LIPI

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3178.138 KB) | DOI: 10.14203/jkti.v16i1.4

Abstract

Antioksidan adalah suatu senyawa yang dapat menangkap radikal bebas. Salah satu sumber anti oksidan alami adalah dari tumbuh-tumbuhan. Dalam usaha pencarian antioksidan baru, telah dilakukan identifikasi senyawa antioksidan dari ekstrak n-heksana kulit batang Garcinia bancana Miq dengan metode 1,1-difenil-2-pikrilhidrazil (DPPH). Metode isolasi dilakukan dengan cara  kombinasi kromatografi (Kromatografi kolom vacum, kromatografi kolom gravitasi, kromatografi lapis tipis  sentrifugal dan kromatografi lempeng tipis)  Penentuan struktur molekul berdasarkan analisis data spektroskopi UV-VIS, IR, LC-MS, NMR proton dan karbon. Dari  hasil isolasi didapatkan suatu senyawa isoprenil bezofenon dengan bobot molekul 466,22 dan  rumus molekul C28H34O6 dengan nama IUPAC 3-(3,4-dihidroksibenzoil)-4-hidroksi-8-8-dimetil-1,7-bis(3-metilbut-2enil) bisiklo (3.3.1) non-3-ene-2,9-dione atau disebut bacanone yang diduga senyawa baru. Dari proses isolasi juga ditemukan senyawa atsiri b- caryophyllene, α-humulene dan b-cadinene serta stigmasterol. Hasil uji aktivitas antioksidan ekstrak n-heksana dan hasil isolat murni menunjukkan IC50 berturut-turut 17,78 ppm dan 12,79 ppm dimana pembanding kuersetin adalah 9,90 ppm.Kata kunci:  Garcinia bancana, antioksidan, DPPH, 3-(3,4-dihidroksibenzoil)-4-hidroksi-8-8-dimetil-1,7-bis(3-metilbut-2enil)bisiklo(3.3.1)no-3-ene-2,9-dione, bacanone. Antioxidants are compounds that can capture free radicals. One source of natural antioxidant is from plants. On searching  for new antioxidant, identification of antioxidant compound of the n-hexane extract of the stem bark of Garciniabancana Miq was done by  1.1-diphenyl-2-pikrilhidrazil (DPPH) method. Isolation active compound were done by combination of chromatographic methods (Flash column chromatography, gravitation column chromatography, cetrifugal thin layer chromatography and thin layer chromatography) .Determination of molecular structure by analysis spectroscopic data of UV-VIS, IR, LC-MS, NMR proton and carbon.Isolation results were      isophrenyl bezophenon with molecular weight 466.22 and the molecular formula is C28H34O6 IUPAC name 3 - (3,4-dihydroxybenzoil)-4-hydroxy-8-8-dimethyl-1,7-bis (3-methylbut-2enyl) bicyclo (3.3.1) non-3-ene-2,9-dione or named bacanone wich is suspected as a new compound. From the isolation were also found of known volatile compounds b - caryophyllene, α-humulene and b-cadinene and stigmasterol. The test results of antioxidant activity of  n-hexane extract and pure compound  showed IC50 respectively 17.78 ppm and 12.79 ppm which comparison with  quercetin is 9.90 ppm. Key words :  Garcinia bancana Miq., antioxidant, DPPH, 3-(3,4-dihydroxybenzoil)-4-hidroxy-8-8-dimethyl-1,7-bis (3-methylbut-2enil)bisiklo(3.3.1)no-3-ene-2,9-dione, bacanone.

Page 1 of 29 | Total Record : 283

 1   2   3   4   5 

Filter by Year

1991 2022


Reset
Filter By Issues
All Issue Vol 24, No 1 (2022): Jurnal Kimia Terapan Indonesia Vol 23, No 2 (2021): Jurnal Kimia Terapan Indonesia Vol 23, No 1 (2021) Vol 22, No 1 (2020) Vol 21, No 2 (2020) Vol 21, No 1 (2019) Vol 20, No 2 (2018) Vol 20, No 1 (2018) Vol 19, No 2 (2017) Vol 19, No 1 (2017) Vol 18, No 02 (2016) Vol 18, No 01 (2016) Vol 17, No 2 (2015) Vol 17, No 1 (2015) Vol 16, No 2 (2014) Vol 16, No 1 (2014) Vol 15, No 2 (2013) Vol 15, No 1 (2013) Vol 14, No 2 (2012) Vol 14, No 1 (2012) Vol 13, No 2 (2011) Vol 13, No 1 (2011) Vol 12, No 2 (2010) Vol 12, No 1 (2010) Vol 11, No 2 (2009) Vol 11, No 1 (2009) Vol 10, No 1-2 (2000) Vol 9, No 1-2 (1999) Vol 8, No 1-2 (1998) Vol 7, No 1-2 (1997) Vol 6, No 1-2 (1996) Vol 5, No 1 (1995) Vol 4, No 2 (1994) Vol 4, No 1 (1994) Vol 3, No 2 (1993) Vol 3, No 1 (1993) Vol 2, No 1-2 (1992) Vol 1, No 2 (1991) Vol 1, No 1 (1991) More Issue