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Register a new userتحضير وتوصيف الحفاز V-MCM-41 وفعاليته الحفزية في تفاعل أكسدة جزئية لمركب عضوي
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Aِl-Baath University رسالة ماجستير
Publication date
2017
fields
Chemistry
and research's language is
العربية
Created by
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لقد تم تحضير وتوصيف خمسة حفازات من نوع V-MCM-41 مختلفة عن بعضها في كمية الفناديوم وقد تبين أن الفناديوم موجود في بنية الحفاز
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References used
عبد العزيز بيطار كيمياء السطوح والحفازات منشورات جامعة البعث
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A silicate catalyst prepared which has a mezopore type (MCM-41)
,by manner that condensation where the interaction between Tetra
Ethyl Ortho Silicate (TEOS) with 3-Mercapto Propyl Tri-methoxy
Silane (MPTS), in the presence of superficial active su
bstance
{Cetyl Trimethyl Ammonium Bromide(C 16 TAB)}at room
temperature.
The process of changing the surface hydophilic of the catalyst has
done by using substance( Hexa methyl disilazane), which
symbolized by the symbol (HMDS).
It is found that the ferric ions, as a catalyst, have a weak effect on the
oxidation of luminol "triaminophtal hydrazid" by (DPCA) and through chemiluminescence
reaction. For increasing the catalytic activity of ferric ions we
used organic and non
organic compounds. The best compound was o –
phenathroline. It forms two different complexes with ferric (A) and ferrous (B)
ions (A, B). The formation of hydrolyzed mixture of the complexes (Ph-Fe3+)
depends on the pH. We found that (Ph-Fe3+) complex was very effective in
chime-luminescence process above mentioned.
The Umayyad state has raised on a basic support represented by Arab discrimination
. In time the prospect of the Islamic call has expended . The Arab Islamic world parties
have expended to include Arabs and non Arabs of different races . the suppor
ters have
become as second center in the literary status and the social treatment on both . The
political parties have noticed that there is a type of a complaint of the supporter so they
attracted them to it . This discrimination has extended to include the Arabs themselves so
they sided with the tribe bloc and persecuted others . The conflict has been between Arabs
and non Arabs and between Arabs themselves Yemen and Al-Qaysiyah,This was one of
the reasons for the deterioration of the Umayyad state and its fall .
This research aims to analyze the wholesale prices for both types of table grape
Helwani and Baladi in AL-Hal`s Market in Damascus city, being the main center
for selling grapes of south area in Syria. It has been done as a sector research for
one
season 2003, as will as the applied selling techniques in this market were
determined.
The maximum and minimum prices for both categories were recorded
depending on some commission traders, producers, guarantors and exporters, daily
and round the season, which the beginning and end for each were determined.
Centralization and deviation measurements; in addition to correlation coefficient
for prices averages for both the two prices and the two weekly prices range were
calculated. The correlation with each other, the correlation of each with time, and
the regression functions for previous relations were defined.
أجري هذا البحث بهدف التحري عن بكتريا العصية الشمعية وعزلها من بعض الاغذية المحلية الجاهزة للأكل ( المقبلات الغذائية ) كمتبل الباذنجان والحمص بالطحينية والسلطات الجاهزةوالنودلز المباعة في الاسواق السورية
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