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Hasil Pencarian

Ditemukan 2 dokumen yang sesuai dengan query
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Kendra Hartaya
Abstrak :
Telah dilakukan karakterisasi terhadap bahan penyulut pembakaran buatan Jerman. Bahan ini diperoleh dari perusahaan distributor PT Pudji Thajaja Industrial Corp di Medan. Karakterisasi meliputi analisis kualitatif dan analisis kuantitatif, penentuan nilai kalor, Titik Lebur, Panas fusi, Laju pembakaran dan peramalan mekanisme reaksi pembakaran. Analisis kualitatif dengan metode difraksi sinar-x dan analisis kuantitatif dengan metode Kromatografi kolom secara gravimetri mendapatkan komponen penyusun bahan penyulut pembakaran, yaitu Paraffin wax 57,14 7b dan ammonium perklorat 42,86 %b. Sifat-sifat fisik yang dimiliki bahan bakar penyala tersebut adalah Titik lebur 64,8°C, Panas fusi -142,66 kJ/gr, Nilai kalor 9665,182 kal/gr, Laju pembakaran 0,7657 gr/menit, Kadar abu 3,8%.
Fast fire lighter fuel made in Germany has been characterized by x-ray diffraction method and gravimetric column chromatography. Fuel is obtained from the distributor company PT Pudji Thahaja Industrial Corp, in Medan. The characterization involves qualitative and quantitative analysis, determination of calorivic value, melting point, fusion heat, burning rate, and prediction of reaction mechanism. The sample contains paraffin wax 57,14 %w, ammonium perchlorat 42,86 %w. The other character is melting point 64,8°C, fusion heat -142,66 kJ/gr, calorivic value 9665,182 cal/gr, burning rate 0,7657 gr/mnt, ash content 3,8% w.
Fakutlas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 1997
T-Pdf
UI - Tesis Membership  Universitas Indonesia Library
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Sumi Hudiyono PWS
Abstrak :
Inhibitionactivity of ethyl acetate of kluwek fraction on the linoleic acid oxidation catalysed by lipoxygenase: study was carried out to observe the inhibition activity of ethyl acetate kluwek (fermented pangium edule reinw) fractions on the enzymatic oxidation of linoleic acid. The degree oxidation of sample was determined according to the PV and TBA methods. The most active fraction then was treated as the inhibitor for enzymatic oxidation of linoleic acid catalyzed by lipoxygenase (E.C. 1.13.11.12). Data analysis shown that the antioxidant activity of kluwek fraction was: fraction B> fractionC> fraction A> control. Enzymatic assay of fraction B gave a kinetic inhibition as an uncompetitive inhibitor with Ki=1.1294% v/v.Physicochemical analysis of its effect to the enzymatic oxidation rate was significantly different according to the PV and TBA values and compared to the control
Depok: Fakutlas Matematika dan Ilmu Pengetahuan Alam Universitas Indonesia, 2002
SAIN-7-1-2002-11
Artikel Jurnal  Universitas Indonesia Library