The corrosion inhibition of transmision steel in 1M HCl solution in
the presence of Vanillin at temperature (20,30,40,50,60)°C at
concentration between (100-500) ppm for two hours were studied
using weight loss method.
The corrosion inhibition of transmision steel in 1M HCl solution in
the presence of Succinic acid at temperature (20,30,40,50,60)°C at
concentration between (10-6- 10-4) M for two hours were studied
using weight loss method.
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 ar
omatic 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.
يدرس هذا البحث تآكل الحديد في أوساط مختلفة كالوسط الحمضي والقلوي والمياه المالحة ومياه الشرب والهواء الرطب
This investigation was done in the laboratories of the Faculty of Agriculture
– Damascus University in the Department of Food Sciences. The aim of this
research use to study the inhibition effect of the growth and activity of Lactic
acid bacteria
used as starter and on the growth of Staph. aureus bacteria. Pure
strains of Staph. aureus and Lactic acid bacteria was used the effect of Lactic
acid bacteria (Streptococcus thermophilus and Lactobacillus bulgaricus) on the
number of Staph. aureus was studied at 37 ◦C and 4◦C. The Lactic acid bacteria
were inoculeted in milk for the manufacturing of yoghurt. The number of
Staph. aureus was fixed then was decreased gradually according to time. And
the decreasing number of this bacteria was clear when S. thermophilus and Lb.
bulgaricus were used as a mixture starter, then when was used as a single
starter, Lb. bulgaricus and S. thermophilus.
The ovary of a laying hen contains follicles in the rapid growth phase
which have advanced from a pool of follicles in the resting stage of about
٦-٨ mm in diameter. Little is known about mechanisms regulating follicular
transformation from the re
sting stage to the rapid growth phase. One potential
regulator of this transformation may be Follicle Stimulating Hormone
(FSH). In addition, there are accumulating results indicating that a negative
relationship between inhibin and FSH may be existed.
