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Register a new userStudy of Some Chemical and Microbial Properties of Cherkes Cheese
دراسة بعض الخصائص الكيميائية و الميكروبية للجبنة الشركسية
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أحمد هدال( باحث )
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هدف هذا البحث الذي أُجري في قسم علوم الأغذية بكلية الزراعة في جامعة دمشق إلى تقييم جـودة الجبن الشركسي من الناحية الكيميائية و الميكروبيولوجية. أجريت الاختبارات على 40 عينة مـن الجـبن الشركسي جمعت بشكل عشوائي و من أماكن متفرقة من أسواق دمشق و ريفها. بينت الدراسة وجود تباين كبير في الخصائص الكيميائية للجبن الشركسي، إذ راوحت نسبة الحموضـة (25.0-54.0%) و نـسبة الرطوبة بين (38-56%) و نسبة المادة الجافة (44-7.62%) و نسبة الدسم في المادة الجافـة (20- 33%) كما دلّت النتائج أن 50%من العينات كانت مخالفة للمواصفة القياسية السورية من حيـث نـسبة الملح التي راوحت من (2.1-3.4 %) كما بينت النتائج الميكروبيولوجية خلو العينات المدروسة جميعها من الـ Salmonella ، و عدم وجود أي مخالفة بالنسبة إلى بكتريا aureus.Staph ، كما بينت النتـائج أن 5.37 %من العينات كانت مخالفة للمواصفة القياسية السورية من حيث عدد الكوليفورم و 10 % مـن العينات بالنسبة إلى بكتيريا coli .E .
This research was conducted in Agriculture College (Food Science Dep., Damascus U university). The purpose of this research was to evaluate Cherkes Cheese by determination some Chemical and microbial properties for 40 samples collected randomly from different places Damascus and country sides. The results showed very deferent changes in Chemical properties. The acidity ranged between (0.25 - 0.54%), moisture content (38 - 56%), and total dry matter (44 - 62.7%). Results also showed that all samples were rejected by (Syrian Normal Standard)for fat content in dry matter (20 -33%). Fifty percent of samples were rejected for their content of sodium chloride which was (1.2 - 4.3%). Results also showed that samples were free of Salmonella and there was no rejection for existence of Staph. aureus but 37.5 % and 10% of samples were rejected by (Syrian Normal Standard)as per content of coliform and E.coli, respectively.
References used
AOAC Association of Official Analytical Chemists. (2002). Official Methods of Analysis 17th ed., Margland : AOAC International
Arispe, I. and Westhoff, D. (1984). Venezuelan white cheese: composition and quality. J. Food Protect. 47,27-35
Bishop, J. R. and White, C. H. (1985). Estimation of potential shelf life of cottage cheese utilizing bacterial numbers and metabolites, J. Food Prot. 48, 1054-1057
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This study was carried out at the laboratory of Food Science Department,
Faculty of Agriculture, Damascus University in order to evaluate physical,
chemical and microbial properties of Akkawi cheese in Syria. Thirty samples of
Akkawi Cheese collec
ted randomly from different Syrian cities and urban
markets during 2011 were analyzed. Chemical and microbiological analyses
were applied to determine their suitability to the Syrian standards. Results
showed that the quality of cheese samples did not fulfill the set minimum
Syrian quality standards and the proportion of the violation of the Syrian
specification for total dry matter in cheese samples studied was nearly 10%,
and 100% for sodium chloride. The study also demonstrated differences in
chemical properties, with an average of acidity, moisture content 0.34 %, 53.9
% respectively. The fat content had a wide range for all cheese samples. On the
other hand, the proportion of health violation for this type of cheese from the
Syrian standard was 73.3 % for Coliform bacteria and 56.6 % for the E. coli.
but they were acceptable for the existence and account of Staphylococcus
aureus , Salmonella and Listeria.
The objective of this research to study the chemical composition and microbial load
for some types of pies by performing various chemical and microbial analysis of samples
collected, from different parts of the Syrian coast which are famous for its
production.
This study showed a large variation in the chemical composition of samples by type
of the pastry and place brought from, for example, the proportion of dry matter for peppers
and chard pies collected from Banias was, 75.71% and 44.90%, respectively, and the
percentage of dry matter was 73.88% and 76.18% and the proportion of protein was,
17.76% and 24 .88% for cheese pies collected from Tartous and Latakia 1, respectively.
This study indicated that all the pies contain a high percentage of fat [the lowest in chard
pies (17.64%) and the highest in cheese pies (38.12%)]. Furthermore a high percentage of
sodium was found (the highest in cheese pies 15.31 mg / 100 g and lowest in pepper pies
7.82 mg / 100 g).
The study also showed that these meals meet international standards in terms of
content of lead, cadmium, Nevertheless they are poor in fiber content except for chard pies
which were the most balanced in terms of components, making it the best type of pies in
nutritional aspect.
Finally, the results showed that the microbial load was too high, as the total census of
bacteria was higher than 105 and the total census of yeasts and fungi was higher than 102.
In addition, all pies are not conformed to the Syrian legislation. The study also showed
absence of E.coli and St. aureus of all samples.
Terebinth trees have been occupying a good part of the mount of Syrian
(abed elaziz, pelass). The Pistacia atlantica fruit, rich in oil, is used by local
inhabitants in many ways, few studies investigation of the P. atlantica fruit oil
of Syria ha
s been carried out,This study investigates the protein, ash, crude oil
and oil composition of P. atlantica with respect to total phenol, iodine value and
saponification value, in order to classify it among the other known edible oils
thenafter compare the oil composition with the oils of other Pistacia species.
The fruit of P.atlantica appears to be rich in oil. The major fatty acid in the
sample studied are oleic, linoleic, our results show that. The oil has a higher
content of unsaturated FA (oleic + linoleic = 72%). The oil can be classified as
an oleo-linoleic vegetable oil. The biochemical data showed an elevated MUFA
content (50-48%) which may constitute an important property against certain
pathologies for its nutritional and preventive virtues.
This investigation was conducted to study the effect of cooling preservation
on some microbiological (total count of organism, yeast and fungi, Coliform
bacteria), chemical (total soluble solids, total acids, vitamin C) parameters and
sensory eval
uation of Broccoli during refrigerated storage and to determine the
acceptability of the best treatment of the broccoli by customer during
refrigerated storage. Two hybrids of broccoli, F1 Kondi and F1 Kibbah grow at
Abi Jarash farms of Damascus University in 2011/2012 season were used.
Three treatments were applied on two hybrids of broccoli. Treatments 1
(broccoli was stored without any packaging), treatments 2 (broccoli was stored
after packaging without vacuum sealed) and treatments 3 (broccoli was stored
after packaging with vacuum sealed).
Results showed and based on microbiology, chemically and sensory
evaluation that the best treatment to save the broccoli reverberated was
treatment 3 for the both hybrids of broccoli F1 Kondi and F1 Kibbah (broccoli
was stored after packaging with vacuum sealed) where the broccoli F1 Kondi
was preserved without any changes in sensory parameters and accepted
qualities for 15 days and for 10 days for broccoli F1 Kibbah.
The aim of this study was to determine some physical, chemical and microbiological density (fungi – bacteria) of a Pine forest soil in the coastal region (Al-Ballotiah forest, Banias) where Quercus calliprinus is the main dominant plant.
Three soi
l profiles were taken and their morphological characteristics were determined, the thickness of accumulated organic matter and GPS data were also recorded.
For physical and chemical analysis, samples from each profile horizon were taken and air- dried, whereas for the microbial diversity analysis, samples were taken twice in autumn and spring; and transported and stored at 4C.
The results showed that the studied soil belongs to Mollisols, Entisols with A-AC-C1-C2 profile types. Our results also showed that the soil depth was (153-150 cm) and rich in calcium carbonate.
Soil pH is alkali, where the pH ranged between (7.91-9.13) that increased bacterial activity and density in organic litter and mineral soil, which was related with the organic matter ratio. This ratio decreased significantly with soil depth that affected the microorganisms density which behave in the same manner. However, an increasing of microorganisms density was detected in spring especially in first horizon.
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