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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 9 Documents

Search results for , issue "Vol 9, No 1-2 (1999)" : 9 Documents clear

EFEKTIVITAS ESTER SORBITAN UNTUK STABILISASI SARI BUAH Anny Sulaswatti; Siti Isnijah; Hilyati Hilyati; Nuryatini Nuryatini; M Greasia; R Endang; Haryadi Haryadi; Burhanuddin Burhanuddin
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

Sorbitan esters is a nonionic surfactant which can be used as stabilizer or emulsifer i.e for food products. Nonionic surfactant is almost completely provided imported.Fatty acid derived from vegetable oil are potential for producing these esters. Indonesia is one of the largest palm oil producers in the world and sorbitol has already be produced in Indonesia, so that is has oppotnity to develop sorbitan ester. The aim this research is to evaluate the application of P3KT sorbitan esters as stabilizer in fruit juicescomparing with available commerical food stabilize.

PERAN ILMU PENGETAHUAN DALAM MEMPERKUAT UPAYA PENGENDALIAN PENCEMARAN LINGKUNGAN YANG EFEKTIF Roy Heru Trisnamurti
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

Proses Dekomposisi untuk Pembuatan Serbuk Alumina dari Aluminium Format Silvester Tursiloadi
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

The high purity excellent chemical stability and mechanical properties, is quite important for alumina ceramic products. The alumina ceramic products was made from aluminium formate in this study. Decomposition of organic salts is a useful method for preparation of pure and fine ceramic powder without using of expensive metal alkoxides and without producing air pollution. The aluminium formate alt was prepared from reagent grade AlCl3.6H2O,AlCl3.6H2O was dissolved in H2O and then NH4OH was added to the solution. The white precipitates formed were washed with distilled water repeatedly, then dissolved in formic acid solution. Alumina powders prepared by decomposition of aluminium formate had high chemical purity and had small size of agglomerates with a narrow size distribution. The spesific surface area and the equivalent spherical diameter calculated from the value of spesific surface area were 60 m2/gr and 0.03um. The value of equivalent spherical diameter of Al2O3 powder in cumulative mass percent for finer particle were diameter (10%) of 1.7um and diameter (50%) of 5,5um. The average diameter of particles was 5.5um. For the alumina powders which was prepared by docomposition of aluminium formate, the x- Al2O3 and x- Al2O3 did not appear as intermediate phase between y- Al2O3 and a- Al2O3 when calcinated from 800°C to 900°C .However a- Al2O3 phase appeared at 800°C, so that this could reduce the transition temperature from y- Al2O3 to a- Al2O3. The single phase of a- Al2O3 was obtained after calcinating at 1100°C or more for 2 hours.

EVALUASI KANDUNGAN THEAFLAVIN DAN THEARUBIGIN PADA TEH KERING PADA KEMASAN Dadan Rohdiana
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

Theaflavin and thearubigin are important compounds produce by enzymatic oxidation of polyphenol compounds in tea liquor. These compounds influent liquor quality in tea quality, es ecially color annd teste. Among the all Criteria of ea liquor quality value, color and taste.The enzymatic oxidation of polyphenol compounds will continue change theaflavin to thearubigin, so thearubigin content in tea is higher than thaflavin. This research is aimed to evaluated theaflavin and thearubigin content in Indonesian packed tea.Generally tea process manufacturing classified into four groups, i.e: black tea, green tea, jasmine tea and other aroma of tea.Analitical result showed that black tea have higher theaflavin and thearubigin content than green tea and jasmine tea. this case is understandale, because theaflavin and thearubigin is care product polyphenol compounds oxidation, where black tea experienced full of oxidation.

Kinerja Katalis Nikel/Titanium Oksida Yang Dibuat Dengan Metoda Impregnasi Terhadap Hidrogenesi Minyak Sawit Dewi Sondari; S.R Wahuningsih
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

The preparation of nikel aktif metal catalyst and oksida titanium as supporting materials by impregnation method.The content of metal is various between 20-30% (weight). Specifik surface area of catalyst is measured BET method, the content 22.5% of catalyst have maximal specific surface area is 14,5288m2/gr.From XRD analysis, aktif metal catalyst before reduction is metal oksida NiO (200) at 20 = 43,47, after reduction showednickle metal cristal at 20 = 44,50 is peak caracteristic from Ni (111).Test activity comerical catalyst after reaction time two hoursiodine number decreased 34,00 preparated catalyst 44,50 atcontent 22,5%.

PENGARUH LAMA WAKTU PENUMBUHAN SECARA VIBRASI TERHADAP STRUKTUR, KAPASITAS TUKAR KATION DAN INDEX SWELLING BETONIT Tasrif Tasrif; Siti SP Isnijah
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

Bentonite is a kind of mining products, which contains high level of clay mineral as monmorillonite which has several properties. Before marketed is should be pulverized and packed. Pulverizing can be done traditionally by mean of using mortar as well as by modernly used mechanical grinder and vibrating discs mill. Effect of methods and duration of mechanical grinding on the characteristics of product including is structure, cathion exchange capacity and swelling index will be presented in this paper.Betonies was taken from Boyolaly-Central Java and pulveried traditionally as well as modernly in 2.5; 5.0; 7.5; 10 and 12.5 minuts. Alterations of its properties were analyzed, cathion exchange capacity and swelling index.Conclusion could be drawn that traditionally pulverizing did not affect on the structure of bentonie. However, the mechanical method using vibrating discs mill decrease the cathion exchange capacity, swelling index and cohesion forces might change the structure of montmorillonite from crystalline to amorf.

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.

SINTESIS SENYAWA S-BENZOIL-MAG3 UNTUK PEMBUATAN KOMPLEK 99mTC-MAG3 Ratnawati Kukuh
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

SYNTHESIS OF S-BENZOLY-MAG3 FOR THE PREPARATION OF 99mTc-MAC3 COMPLEX. 99mTc-MAG3 is a new radiopharmaceutical having similar biological properties to 131Ilabeled. Hippuran and is expected to be useful as an ideal agent for renal funtion evaluation. In order to develop the abovepreparation, it is necessary to synthesize S-benzoly-MA3 ligan. In the present study the synthesis was carried out in a 3 stepsreaction of succinimiidyl-S-benzoylthinglycolic acid from S-benzoyltingioglycolic acid, N-hydroxysuccinimide and N,N' -dicyclohexylcarbodiimide. The last step is syntesis of benzoyl-MAG3 from siccinimidyl-S-benzoylthioglycolate and glycylglycylglycine. The product has a crystaline from, colorless needles with a melting point of 203-204°C Purity testing by HPLC yielded a single peak, indicating a sufficiently pure compound. IR spectrophotometry provides proof that the compound is S-benzoyl-MAG3.

KOTORAN TERNAK SEBAGAI INOKULUM PADA PENGOLAHAN AIR LIMBAH PABRIK GULA SECARA BIOLOGI-AEROB Hendro M Santoso; Yahya Kurniawan
Jurnal Kimia Terapan Indonesia Vol 9, No 1-2 (1999)
Publisher : Research Center for Chemistry - LIPI

A study on the treatment of Sugar Factory wasted water by using biological aerobic process was carried out at a laboratory sacle. Cow dung and chicken dung were used as inoculum to raduce the organic compounds is waste water. The levels of inoculum concentration used were 5; 10; 15; 20; and 25 per cent. The experiment was conducted bt a one way completely randomize design. The treatment process was followed by observing the changes in the BOD and COD parameters. The results showed that the chicken dung inculum reduce COD content up to 73-76 per cent and BOD content up to 81-86 per cent. The cow dung inculum reduced COD and BOD contents up to 97-92 percent and up to 65-95 per cent respectively.

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