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Register a new userمساهمة في تحسين ثباتية فيتامين C في المستحضرات الجلدية
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Tishreen University رسالة ماجستير
Publication date
2012
fields
Pharmacy
and research's language is
العربية
Created by
Shamra Editor
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مساهمة في تحسين ثباتية فيتامين C في المستحضرات الجلدية: قمنا في هذا البحث بدراسة الثباتية الكيميائية للفيتامين C أو حمض الأسكوربيك في مستحضرات جلدية موضعية بتراكيز 2%
No English abstract
References used
Spiclin P ;Homer M Zupancic A ; Gasperlin M Sodium ascorbyl phosphate in topical microemulsions
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This study was conducted at Gharabo farm, Fac. Agric. Damascus
Universityin order to determine the effect of heat sress and level of vit. C on the
blood indicators of of Japanese quailc A total of 252 females Chicks were
distributed randomly into
two groups (G and G2) at one day of age, The chicks
in G1were subjected to an ideal temperature required according to their age up
to 30 days old, while the chicks in G2 were subjected to heat stress at 42 °C
during the daytime from 8 am to 5 pm and to ideal temperature from 5pm to
8am for the same period of rearing. Chicks of each group were distributed into
three subgroups given three levels of vitamin C: 0, 10 and20 g/l, with three
replicates for each sub-group during the rearing period. Blood samples were
collected from eighteen birds selected randomly from each group. Results
indicated that there was a significant increase in both red blood cells and
hemoglobin in the stressed group.
In this research, the quantity of vitamin C which extracted from fresh fruits and
vegetables was evaluate by using titration method with 6-2 Dichloro phenol andovinol, and
studying the effect of conservation and different temperatures (30, 60, 90)
°C which used
in cooking on content of vitamin C for some samples. Also this search included studying of
the effect of iron ions on content tomato, orange and lemon of vitamin C.
The results showed that the concentration of vitamin c in studied samples: parsley,
red pepper, green pepper, lemon, orange and tomato was (8, 22, 36, 144, 175, 133)
mg/100g respectively. Losing of the vitamin was (66%, 65%) when we save the leaves and
stalk of parsley for 24 hours respectively, when exposure the parsley leaves to the
temperatures (30, 60, 90) c° the losing percentage was (24 %, 41%, 62 %), While the
losing was (79%, 65%, 39%) when injected each of tomatoes, oranges, lemons with
dissoluble of iron.
This experiment was conducted at Kharabo farm, Faculty of Agriculture,
University of Damascus. A total of 252 chicks of Japanese quail breeder females
were distributed on the first day of life into two groups, Gicks in G1 were
reared from 1-28 day
s of age under ideal required temperature according to
their age, while chicks in G2, were subjected to heat stress from 8 am to 5 pm at
42 °C from the first day of hatching until 28 day of age and to the ideal
required temperature from 5 pm until 8 am. Chicks of each group were
distributed into three subgroups, with three replicates per subgroup.
In research we studied the effect of vitamin C on the level of total
cholesterol ،triglycerides ، (HDL) and (LDL) in the stressful
rabbits blood by hydrogen peroxide (H2O2) . We used 30 rabbits
were divided into three groups:First groupnot stresse
d (control
group) ، Second group (Group stressed by H2O2) left without
treatment until the end of the experimental period ، third group
(Group stressful by hydrogen peroxide) was given orally vitamin C
solution at a rate of 100 mg / kg of body weight per a day for five
weeks.
The properties of produced flour of wheat are affected by two basic factors: the first
is the used wheat properties, the second is the milling technology, and other factors are
related to wheat preparation process milling process like the gap betwe
en the roller milling
and still other random factors. The aim of this research to study the variation of
technological properties (moisture content, protein, and ash), color, and rheological
properties of produced flour in commercial mill during two month and using a one type
wheat and in the same mill, which will show the effects of random factors of the mill
process on the variation of produced flour properties at tow point the first at the end of
production line and the second at packaging line. Stability of produced flour properties
have been determined by using individual control charts. Rheological properties have been
studied just for packaging line samples. The variation of technological properties of
packaging line sample were greater than production line sample, and laying many sample
points out of limiting lines shows that the milling process is out of control. Control charts
of rheological properties shows that one sample point out of limiting line, but it still in the
range of standard methods repeatability which is mean the process is under control
according to packaging line sample rheological properties.
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