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Register a new userتأثير قطبية الحفازات السيليكاتية العضوية في تحضير 5- هيدروكسي ميتيل الفور فورال
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Aِl-Baath University رسالة ماجستير
Publication date
2016
fields
Chemistry
and research's language is
العربية
Created by
Shamra Editor
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يمكن تنشيط معظم التفاعلات الكيميائية بواسطة الحرارة ولكن عندما يكون التفاعل ناشرا الحرارة فإن ارتفاع درجات الحرارة يمكن أن يؤدي إلى نقصان سرعة التفاعل
No English abstract
References used
sha W, Duncan J. 1966 , Introduction to Colloid and Surface Chemisty
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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.
Methodsof soils cultivating and organic fertilizer are considered as
the most important operations that change the soil; and prepare it
to receive multiplications units of the crops that we want to plant
and to provide the suitable conditions for feeding the plant later,
and to increase the production and to improve the quality along
with keeping the various properties of the agriculture soil.
In this research study of the conditions necessary for the preparation of a chemical
compound hydroxyapatite HA [HA: Ca10 (PO4) 6 (OH) 2] Depending on normal vital
source ( eggshell ) , which contains a large amount of calcium carbonate , which wil
l be
dealt with Acetic acid
for acetate calcium Ca (CH3COO)2 , which in turn will be dealt with disodium
hydrogen phosphate Na2HPO4, where and to prepare the treatment process depends on
several factors , including: the concentration of the solutions , Solution temperature,
stirring speed and addition , the degree of purity of the material used and its source, and the
pH of the solution PH . The study showed that the chemical formula of the compound
outlined in the bunting record is:
Ca10 (PO4) 6 (OH) 2 and has a Molar ratio Ca / P stood at 1.65344
and preparation process was the best in the burned model of the form , dried and this
was confirmed by sampling study of the two models , dried and burned in IR spectroscopy
and spectroscopy x-ray diffraction XRD where the burned model output was crystalline
either in the form of dried product was mixed crystalline and crystalline .
It was investigated in this study the influence of
Carboxymethylcellolose (CMC) solution concentration,
temperature, and pH on the rheological properties according to the
shear stress as function of shear rate. Experimental results show that
shea
r stress increase at all operational conditions as the shear rate
increase. When the shear rate is constant, the shear stress increases
also with the increasing of both concentration and pH as well as the
decreasing of temperature.
A novel Azo-Schiff base ligand L 2-[1.5-Dimethyl-3-[2-(5-methyl-1H-indol-
3-yl) - ethylimino] - 2 - phenyl - 2,3 - dihydro - 1H - pyrazol - 4 - ylazo] - 5-
hydroxy -benzoic acid has been synthesized from reaction 1.5-Dimethyl-3-[2-(5-
methyl- 1H -
indol - 3 - yl) - ethylimino] - 2 - phenyl - 2.3 - dihydro - 1H -
pyrazol - 4 - ylamine (A) with m-hydroxy benzoic acid. Then, its Zn(II), Cd(II)
and Hg(II) complexes were synthesized with the general formula [ML1Cl]
where M = Zn(II), Cd(II) and Hg(II) are reported. The ligand and its metal
complexes have been characterized by elemental analysis, metal content,
Chloride containing, molar conductance, FT-IR, 1H and 13C- NMR, UV-Vis
spectra, magnetic susceptibility, thermal analysis, and mass spectra. The
activation thermodynamic parameters, such as ΔE*, ΔH*, ΔS* ΔG* and K are
calculated from the TGA curve using Coats-Red fern method. The all prepared
complexes were assayed for antibacterial (Escherichia coli and Staphylococcus
aureus) activities by disc diffusion method. The results indicate that all tested
ligand and complexes show antibacterial activity against E. coli and S aureus,
as gram negative and positive bacteria.
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