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Buletin Kimia

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Published by Institut Pertanian Bogor

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Core Subject : Science, Engineering,

Chemical Engineering, Chemistry & Bioengineering Chemistry

Buletin Kimia mempublikasikan naskah dalam bahasa Indonesia dan Inggris di semua bidang yang berkaitan dengan kimia. Naskah dapat berupa laporan terbaru hasil penelitian, penjelasan metode penelitian yang baru, atau pengertian baru dari hasil yang telah ada. Sumbangan teoretis terbaru dapat juga disamakan dengan naskah hasil penelitian. Semua hasil yang ditampilkan dalam naskah sepatutnya lebih mendukung konsep kimia daripada pelaporan fakta. Interpretasi dari kebijakan di atas merupakan wewenang redaksi yang akan memutuskan apakah suatu ajuan naskah memenuhi kriteria atau tidak.

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Articles 6 Documents

Isolation and Characterization of Dextransucrase from Bacterial Isolate Sugar Cane A.E. Zainal Hasan; Laksmi Ambarsari; . Hasim; Aisyah Girindra
Indonesian Chemistry Letter Vol 1 No 1 (2001): Buletin Kimia
Publisher : Department of Chemistry

Dextransucrase is a glucasyltransferase that catalyzes the transfer of an alpha-D-glucopyranosyl group from sucrose to dextran and releasing the fructose. Enzyme activity was determined by measuring the initial reaction rate of fructose released from sucrose. A standard unit (U) is defined as the amount of enzyme that catalyzes the formation of 1 umol of D-fructose per mg of protein per minute. Dextransucrase was produced by fed-bath cultures of isolate bacterial from sugar cane in a mixture containing sucrose (10 % b/v) in themedium fermentation. Extracellular dextransucrase was obtained from bacterial isolate from sugar cane. Final culturedextransucrase activity was 0,2776 Ulmg of protein. Dextransucrase purified by ethanol 80 % showed activity of 4,2077 Ulmg of protein or activity increase 1515,75 %. Temperature optimum was 40 OC and pH optimum was 7.6. All of the metal increased the activity, except HgC12. Dectransucrase kinetics constants, Km is 3,00 mM and Vmaks is 3,5559 unit/mg of proteinlmin. Molecular weight is 95.155 kDa.

Pengaruh Pemberian Youghurt Terhadap Pertumbuhan Gigi Tikus Putih (Rattus Norvegicus Galur Wistar) Maria Bintang
Indonesian Chemistry Letter Vol 1 No 1 (2001): Buletin Kimia
Publisher : Department of Chemistry

The purpose of this research is to get information about the effect of yoghurt on the growing teeth of Rat (Rattus norvegicus strain wistaf). This research used 30 male rats, which divided into three groups. Each group consist of 10 rats. One group was one month old and the others were two and three months old. One of the rats' incisor teeth was cut and the rest length of the teeth were measured by sliding ruler. Each group of the rats was divided into two sub groups. One sub group was given 1,O ml of yoghurt, the others were glven 1,5 mi and 2,O ml of yoghurt once a day for 10 days. The other sub group was given aquadest with the same dose as a control group. Everyday the length of the teeth was measured. The results of this research indicated that yoghurt can accelerate the growth of the rat's teeth, but based on the statistical analyzed it showed nosrgnificant difference.

Analisis Artemisinin Pada Tanaman Artemisia sacrorum, Ledeb dengan Metode Kromatografi Purwatiningsih Sugita
Indonesian Chemistry Letter Vol 1 No 1 (2001): Buletin Kimia
Publisher : Department of Chemistry

Artemisinin, a potent antimalarial sesquiterpene endoperoxide. From the leave parts of the medicinal plant Artemisia sacforum, Ledeb were investigated artemisinin by chromatography. The result were compared with standard artemisinin.

The Air Polution and Noise Of diesel Energy Source (Cases Study In PLTD Kota Bitung Sulawesi Utara) B. Limbong Tampang
Indonesian Chemistry Letter Vol 2 No 1 (2002): Buletin Kimia
Publisher : Department of Chemistry

The aims of this are to find out: 1) The air pollution level a result of the diesel energy source activity. 2) the noise level as a result of the diesel energy source activity. The research was conducted in PLTD Kota Bitung Propinsi Sulawesi Utara. The data was colected from February to June 1999.

Biology Reduction of Coffee Industry Waste Using Eisenia foetida Earthworms June Mellawati
Indonesian Chemistry Letter Vol 2 No 1 (2002): Buletin Kimia
Publisher : Department of Chemistry

Biology reductions of coffee residue, waste from PT. Torabika industry, Tangerang using earthworm have been carried out. The aim of experiment is to know the ability of earthworm to decompose the waste become verrnicompost and to evaluate it quality. The experiment was used earthworms Eisenia foetida species and 25 - 75 % of cow manure as a medium mixture. The result showed that the structure of vermicomost is soft andblack colors with cation capacity is 17.49 - 21.32 megll00. The mineral content were determined using X-ray Fluorescence Spectrometer (XRF), UV-Vis Spectrophotometer and Kjeldahl, the result showed that the concentrations of N are 0.93 - 0.94 %, CI N 11.26 - 15, K 6.64 - 6.95 %, Ca 12.1 - 17.3 %, P 0.09 - 0.16 %, Mn 0.11 - 0.19 %, Fe 2,01 - 2,69 %, Zn 538 - 779 mgl kg. The earthworm biomass was increased until thirdweeks of vermicomposting.

Inhibitory Mechanisms Of Maillard Reaction Products Laksmi Laksmi; H. M. Mochtar
Indonesian Chemistry Letter Vol 2 No 1 (2002): Buletin Kimia
Publisher : Department of Chemistry

To determinine the inhibitory mechanism of antibacterial Maillard reaction products (PRM), heated mixtures containing GL (glukosa-tisin) and TU (molasses-urea) were were studied fcx their effect on uptake oxygen and iron solubility. It was found that the tested PRM had an inhibitory effect on the uptake of oxygen was observed. The PRM also had an effect on the solttbirity of iron in nutrient broth and in phosphate buffer. While the GL mixturereduced the solubility of iron it was increased by the TU mixture.

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Location
Kota bogor,

Jawa barat

INDONESIA