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Register a new userدراسة السلوك الكهركيميائي لبعض المركبات العضوية
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Aِl-Baath University رسالة ماجستير
Publication date
2014
fields
Chemistry
and research's language is
العربية
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دراسة السلوك الكهركيميائي لبعض المركبات العضوية : درس في هذا العمل السلوك الكهركيميائي لبارا نترو الفينول 4,2 - ثنائي نترو الفينول , 2,4,6- ثلاثي نترو الفينول ( حمض البيكريك )
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عصام القلق جمال حمدو التحليل الالي (1) منشورات جامعة دمشق
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Organosulfur compounds have been exploited to reverse the reactivity of carbonyl
compounds. The heteroatom produces a reactivity pattern in a carbon skeleton. Its
electronegativity, being greater than that of carbon (-I effect) and its ability to s
tabilize an
adjacent positive charge (+M effect) makes the sites susceptible to be attacked by reagents
possessing a given “philicity”.
Nucleophiles attacks the odd C atomes (
1,3,5... C attack) whereas electrophiles attacks the
even C atomes (
2,4,6... C attack) of the carbonyl compounds. If the reactivity of a carbonyl
could be reversed, the acyl carbon would become nucleophilic, and if this transformation
can be accomplished, the carbonyl should be regenerated. Seebach termed this process
''umpolung''.
During the three successive seasons of 2002, 2003, and 2004 six populations,
viz.,P1,P2,F1,F2,BC1, and BC2 of two single crosses of cotton (Aleppo40 x
Aleppo90) and (Aleppo33/1 x Line118) were established and evaluated to
explore heterosis, inbree
ding depression, heritability and genetic advance
under selection for reproductive branches number, number of bolls per plant,
boll weight, and ginning percentage. Significant positive heterotic effects were
found for all the studied traits in two crosses except ginning percentage (in the
second cross). Significant positive heterosis over mid-parent and higher parent
for yield components (number of bolls per plant and boll weight) may lead to a
positive heterosis for seed cotton yield/plant.
This study was carried out at Karahta station of field crops research
department General Commission for Scientific Agriculture Researches
(G.C.S.A.R.) Damascus Syria during the 2009 -2010 and 2010 -2011 growing
seasons to estimate gene action, p
otency ratios, heterosis and Inbreeding
depressions. Five population seeds of two single hybrids (Cham-5 × Azeghar-1),
(Bohoth-5 × Gidara-2) were formed by crossing of four inbred lines. The
crosses were subjected to randomized complete block design (RCBD) with
three replications in order to evaluate plant height (PH), number of grains per
spike (GRSP), flag leaf area (FLA), thousand kernel weight (TKY) and grain
(p<0.05) yield per plant (GYP). Mean square results showed significant
differences among mean values of the five populations for all studied traits in
all crosses. Significant heterosis values compared to mid and better parent were
observed for all traits with exception of (PH) (5.82, 1.62)%, (GRSP) (27.49
9.66)% and(TKY) (3.05 7.53)% for Cross-1. (GYP) (82.46, 96.63)% for Cross-
2. (GRSP) (9.09 5.14)%. The potency ratios exceeded (+1) in all traits and
crosses except (PH) (-2.23) for Cross-2. Indicating that over-dominance
towards low placement. The results indicated that Inbreeding depression values
were significant for all traits in Cross-1 except for (GRSP) (10.33), and (TKY)
(15.23). While its values were non- significant for all traits inCross-2except
(GRSP) (25.46*). In most traits epestasis or dominant gene action occupied the
first rank in controlling these traits in both crosses. It could be suggested that
selection for most studied traits in the subsequent generations will be relatively
more effective than in early generations.
In this research we studied the mechanism of the reaction the solution ( Malonic acid , Zinc , Water ) by using different methods.
Due to the economical and medical importance of the Melilotus plant and the wide
distribution of this plant in the Syria environment, it was of necessity to study the the
composition of organic matter extracted from the leaves of this plant.
The M
elilotus Officinal organic matter was extracted and purified their where were studied
by GC-Maas spectrometry.
The organic matter was obtained by Soxhlet extractor and by solvent n-Hexane.
Components have been found which was about (99.91%) from the total of Essential Oil.
The major components were extracted by Soxhlet extractor and the following components
were determined : n-Docosane(39.82%) , Hydrocoumarin(15.39%) ,
Methyl 3-(2-hydroxyphenyl)propionate(14.29%).
The major components were determined by solvent n-Hexane:
1,2-Benzenedicarboxylic acid(17.77%) , 9,12,15-octadecatrienoic acid(12.85%)
The effects of the extracted aromatic oil from the leaves of Melilotus plant on some of
Pathogenic Microorganisms were studied.
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