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Register a new userOrtho-phenylene diamine Study of kinetic by catalase
دراسة حركية أورثو- فينيلين ثنائي الأمين بإنزيم الكاتالاز
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إبراهيم نايف إسماعيل( باحث )
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لإنزيم الكاتلاز وظيقتين الأولى كتالازية تتخرب بارتفاع درجة الحرارة و الوظيفة الثانية أوكسيدية يزداد نشاطها بارتفاع درجة الحرارة. يؤثر إنزيم الكاتالاز في مادة التفاعل أورثو - فينيلين ثنائي الأمين محولا إياها إلى مركبات آزو العطرية المسرطنة. تثبط الحموض العضوية حمض البنزوئيك, حمض الساليسليك, و حمض الاسكوربيك فعل إنزيم الكاتالاز في مادة التفاعل أورثو - فينيلين ثنائي الأمين, و يكون التثبيط تنافسيا بوجود حمضي البنزوئيك و الساليسليك, بينما يكون التثبيط لا تنافسيا بوجود حمض الاسكوربيك.
Catalase enzyme has two functions, first is catalytic and destroyed with high temperature. The second function oxidic , increasing with high temperature. The catalase enzyme effects on the substrate of ortho – phenylene diamine turning it into aromatic cancerogenus azo compounds organic acids such as, benzoic acid, salicylic acid and ascorbic acid inhibit the effect of catalase enzyme substrate ortho – phenylene diamine. The inhibition is competitive when the benzoic acid and salicylic acid effects , while the inhibition is non competitive when the ascorbic acid effect.
References used
Seince E, F, and Knyazov P,.G , 1986-Molecular Oncologia. Leningrad,Medicine p.349
Kinzel ,V , Scribner J,.D , 1977- Cancer Experiments and Concepts . MIR, Moscow, p.360
Dixon, M, Webb, E .C. 1982- Enzymes . MIR , Moscow,p.1115
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Kinetic studies were carried out on the reaction between dimeric fatty acid
C36 with 1.3 Diamino propane and 1.4 Diamino butane and 1.6 Diamino hexane
and 1.8 Diamino octane in molten phase. The reaction was performed at 145ºC.
The polyamidation r
eaction was found to be on the overall a second order up to
83% conversion for reaction dimeric fatty acid C36 with 1.3 Diamino propane
and 86% conversion for reaction dimeric fatty acid C36 with 1.4 Diamino
butane and 87% conversion for reaction dimeric fatty acid C36 with 1.6
Diamino hexane and 1.8 Diamino octane then the reaction order changes to the
third order above last conversion. The degree of polymerization,number
average molecular weight and weight average molecular weight have been
calculated during different times. Their relationships with the times are linear
until last conversion. The melting point and thermodynamic constants for
melting are determined by use of differential scanning calorimetry DSC. The
melting point and thermodynamic constants increase by increasing the length
of reacted amine series.
Carried out a laboratory experiment in order kinetics study of adsorption
of cadmium and lead in the soil, using soil columns experiment, with the
use of concentration 26.25 mg / l for cadmium, and 27.81 mg / l for lead,
and two degrees of pH 5.5, 0.7, with the use of five parameters.
The dissolution rate of Iron and Titanium from Syrian basalt rock was
studied by hydrochloric acid, sulfuric acid, mixture of hydrochloric acid
methanol, sulfuric acid methanol solutions. The effects of temperature, time of
digesting and concentra
tions of acids have been investigated, the ratios of solid
to liquid and stirring speed were constant (S/L=0.02). It has been clear that
when the mixture of hydrochloric acid and methanol (100:50(V:V)
HCL:CH3OH) was used, the best dissolution for both iron and titanium was
obtained when we digested the rock and it took 6h at 100 ˚C where as the
concentration of hydrochloric acid and methanol were [HCl]=11M, [CH3OH]
=0.92M, the resulting ratios of dissolution of iron and titanium in the
mentioned conditions were 75.53%, 63.19 % respectively.
The purpose of this research is to study the performance of peroxide bleach
materials (sodium carbonate peroxy hydrate, sodium perborate mono hydrate,
sodium perborate tetra hydrate) within the low foam powder formula, in terms
of its rate of disi
ntegration with and without an activator, under different
temperatures, in order to obtain a high detergency low foam powder formula.
Fattypolyamide was prepared by reaction of (1,5-Diamino pentane) with
dimeric fatty acid C36 in molten state. The reaction was performed at 110 C˚
without catalyst, then with (Phosphoric acid, Sulphoric acid and Manganese
dioxides). The Kinetic st
udy was carried out on the reaction and followed by
determining the acid value of the product. The polyamidation reaction was
found to be on the overall a second order up to 59% conversion. Then the
reaction order changes. We found that the Catalyst increases the velocity of the
reaction with manganese dioxides the best Catalyst. The Degree of
Polymerization, Number Average Molecular Weight and Weight Average
Molecular Weight have been calculated during different times. The
relationships between Degree of Polymerization and Number Average
Molecular Weight, Weight Average Molecular Weight with times are linear
until 59%conversion at 110˚C with used catalysts. The highest (N.A.M.W) and
(W.A.M.W) was accomplished with the Catalyst MnO2.
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