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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 1, No 1 (1991)" : 6 Documents clear

PENGARUH PROSES FERMENTASI TERHADAP SIFAT ANTINUTRISI BIJI SAGA (ADENANTHERA PAVONINA LINN) Lenny Sutedja
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

Research has been conducted to know whether the steps in the fermentation of saga bean (ADENANTHERA PAVONINA LINN) could decrease or eliminate the antinutraive property of saga bean. The saga bean was fermented with Rhizopus oligosporus L36 and Aspergillus oryzae M8 respectively, and the fermentation steps included cooking, soaking, dehulllng, steaming, inoculation and incubation for 24 until 72 hours at 30°C. Antinutritive assay using protozoa Tetrahymena pyriformis GL showed that cooking followed by soaking had decreased the antinutritive property of saga bean. Then the steaming process had increased the antinutritive property of saga bean. Sinaila, gJ'owth inhibition of protozoa was observed in medium containing steamed saga bean compared to that in medium containing fresh saga bean. Tempe saga, either fermented with R.oligosporus or A.oryzae, showed about 30-100% growth inhibition ofT.pyriformisGL, at a concentration of 103-104 ppm.

FERMENTASI SUBSTRAT PADAT BUAH PISANG DAN APLIKASINYA Anny S.; Lindajati T.; Milono p.; Roestamsjah Roestamsjah
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

This study is aimed at exploring the posibility of preparing tape pisang by solid substrate fermentation method and applying the results for snack foods preparation. Two varieties of banana i.e. "kepok" (Musa paradisiaca ssp normalis) and "ambon" (Musa paradisiaca ssp sapientum) were used in this experiment. After peeling, steaming and cooling to room temperature the banana was inoculated with yeast, strain Y-8 and Y- 11 isolated from commercial yeast for bread and tape. The incubation was done for 3 days ill bottles of 500 ml capacity at room temperature, under semi-aerobic condition.Ln this experiment effect of the type of inocula and substrate forms on the quality of tape plsang were . studied Fermentation process was monitored by observing the changes ill total sugar. starch and alcohol content. Results of the study showed that whole "kepok" banana inoculated wiith yeast strain Y-11 produced a good tape pisang with a sweet. slightly sour and alcoholic taste after 2 days of fermentation, containing starch of 14 %, sugar 21.77 %, and 0.05 % alcohol. The "ambon" bananaproduced lB % of alcohol content after two days. the tape has a too soft texture and less attractive appearance. The yeast strain Y-I1 produced better tape plsang than the strain Y-8. 17,e substrate [orm has influenced the sugar content of the tape produced, and the whole form has produced tape with the best texture and appearallce. The results of organoleptic test by panelist all some typical jam and cakes prepared from tape pisang kepok showed satisfactory acceptability.

PENGARUH AIR DALAM AMPAS TEBU TERHADAP KECEPATAN PENYALAAN DALAM PEMBAKAR PUTAR Syahrul Aiman
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

The pyrolysis of sugar cane bagasse at peak temperatures between 300 and 1100 "C and at heating rates of 200 - 10,000 °Cjs produced water, primary tar, C02 and char. Further decomposition of the primary tar resulted gases and secondary tar. The conversion of dry bagasse to volatile materials was 91.6 %. Bagasse water content influenced the pyrolysisproducts composition. It decreased the maximum yield of secondary tar from 50.6 to 39.8 %, increased total gas yield from 34.5 to 54.7 % and ultimate char yield from 8.4 to 11.7 % (of theinitial dry sample weight). For combustion engineeringpurposes, a singlefirst order reaction model with E = 12.9 kcai/mole, A = 3.33 x 1& s·1 and W· = 88.7 % was a suitable model to predict bagasse pyrolysis reaction rate based on the total weight loss data. The calculation indicated that water in bagasse-decreasedignition rate in a bagasse swirl burner.

FAKTOR-FAKTOR YANG MEMPENGARUHI KUALITAS TEMPE DI INDONESIA Lindajati Tanuwidjaja; Hari Rom Hariyadi; Yetty Mulyati
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

Field Sill dies all tempe home industries had been carried out ill 1975- 1976 and 1987, covering 25 tempe home industries ill West Java and Jakarta areas, 15 ill Central Java and Yogyakarta areas and 15 ill East Java. The quality and price of tempe samples collected from the visited industries and market varied considerably. The price of tempe. varied from Rp 400,-/Kg to Rp l.000,-/Kg in 1987, while the protein content varied from 14.8% to 22.7%. The variation in fat, carbohydrate, fiber and ash content was also observed. Variation was observed also in the use of raw mdterials, additives and inocula as well as variation ill tempe processing techniques, i.e. in the soaking, cooking and inoculation which had caused the variation in tempe quality

POLAROGRAFI DENYUT UNTUK PENENTUAN KADAR EMAS DALAM LARUTAN CAMPURAN DENGAN TEMBAGA DAN PERAK TANPA PROSES PEMISAHAN Soefjan Tsauri
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

Pulse Polarographic determination of gold (- 2 ppm) in a solution mixture with the presence of silver and copper ion without separation has been examined. Utilizing the suitable condition, polarographic peaks of gold, silver and copper were separated and thus could make the determination of gold possible in a solution with silver and copper ions. From the investigations carried out, several conclusions were derived i.e. : 1. A system of KOH 1,5M, KN03 0,02 M and KCN 0,01M, which was then called the complexing and supporting electrolyte mixture or "Elektrolit Pendukung Pengkompleks Campuran (EPPC)'; appeared to be capable to remove the interference of copper and silver peaks from the gold polarogram peak area in tile Derivative Pulse Polarography. 2. The capabilities of this EPPC are used to determine the concentration of gold in the range of 2 to 10 ppm. The determination was carried am by the Derivative Pulse Polarography in a solution mixture with 30 ppm of silver and copper ion. Preliminary application of the EPPC system to the analysis of gold in a rock sample was observed and the result was compared with Neutron Activation Analysis method

APLIKASI CARA VOLTAMETRI PELEPASAN ANOOIK UNTUK ANALISIS LOGAM BERAT OALAM PARTIKULAT OARI UOARA Evita Boes
Jurnal Kimia Terapan Indonesia Vol 1, No 1 (1991)
Publisher : Research Center for Chemistry - LIPI

Determination of heavy metals such as Cu, Pb, Cd and Zn in airparticulate samples have been conducted by using Anodic Stripping Voltammerry method (ASV). Flow injection and wall-jet detector were supplemented to the ASV to improve the sensitivity and reproducibility of the mercury-film electrodes used. The air particulate samples analysed were taken with flow rate of 1 m3/minute. From 5 different places, 20 air samples were analysed and concentration of Cu, Pb, Cd; Zn between 0.0486-16.660 #gjm3 in airparticulates were observed. Limit of detection of the method for Cu, Pb, Cd and Zn were 0.015; 0.020; 0.016; 0.03 ppb respectively. Calibration curves for each metal from 50-500 ppb were linear with correlation coefficient 0.98.

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