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Register a new userStudy Of Microbiological and Morphological Changes in The Eggs During Storage
دراسة التغييرات الميكروبيولوجية و المورفولوجية في البيض خلال التخزين
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للبيض دور كبير في التغذية و الصناعات المختلفة ، نظرا لما يتمتع به من قيمة غذائية عالية و خواص فريدة في إكساب اللون و تحسين القوام . تم إجراء دراسة عامة للحمولة الميكروبية في عينات البيض ، و دراسة التغيرات الميكروبيولوجية أثناء تخزين البيض المغسول و غير المغسول ، و كذلك المبرد و غير المبرد في درجات حرارة مختلفة ، كما و تم إجراء وصف دقيق لكافة الأحياء الدقيقة المتواجدة مورفولوجياً . بينت الدراسة تزايد أعداد الجراثيم بشكل واضح في البيض المخزن في الجو العادي ، حيث تسوء نوعيته و يفقد طازجيته، و تبين أنه يجب عدم غسل البيض المعد للتخزين المبرد أو غير المبرد لمدة طويلة ، لمنع ولوج الجراثيم عبر ثقوب البيضة أثناء عملية الغسيل ، و خاصة عندما لا نأخذ بالاعتبار درجة حرارة ماء الغسيل ، إلا أنه يمكن غسل البيض المعد للاستهلاك المباشر خلال فترة قصيرة و محددة للتخلص من الأوساخ و الجراثيم العالقة على القشرة .
The egg has important role in the food , different food industries, and scientific researches , this is because of its high nutrition value and its special properties that give color and improve texture of food . The microbial content and its changes were studied during storage of washed and unwashed egg and that with cooling and without cooling in different Temperature , also morphology description was studied for all existed microorganisms . This study indicated that microbial growth increases and egg quality decreases in storage egg in natural Temperature and We must not wash egg with cooling and without cooling before storage for long time to prevent the microorganisms from enter through shell of the egg during washing specially without controlled Temperature of washing water ., but it may wash the egg to remove of existing microorganisms on shell .
References used
أبو الخير ، صالح .2000 ، فساد الأغذية ،جامعة دمشق
AGGARWAL, D 2008–Egg Quality and Salmonella spp Growth in Shell Eggs Packaged in Modified Atmosphere Packaging MASTER OF SCIENCE ,Texas Tech University
JIN T., ZHANG H., BOYD G., TANG J , 2008–Thermal resistance of Salmonella enteritidis and Eschericha coli K12 inliquid egg determined by thermal-death-time disk. Journal of Food Engineering, 84: 608–614
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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 present research was to study chemical, microbial and sensory
changes of commercial eggs during refrigerated storage and after treatment
with two different chlorinated water concentrations (100 ppm and 200 ppm)
and two different tempera
tures (20ºC and 40ºC) for 1 minute. Microbial
analysis showed that all eggs samples were free of Pseudomonas, Salmonella,
E.coli bacteria, molds and yeasts. The best treatment was (100 ppm at 20 °C),
followed by treatment with 100 ppm at 40 ° C and the third one was control
sample.
Flower buds of capers were processed by some common methods as pickling,
salting, and other uncommon like freezing with and without blanching and canning. The
results showed that there was no microbiological growth in all methods since the fourth
month of storage. Best growth for lactobacillus bacteria was in 5% brine (8.2 × 106) and
then in 8% brine (1.2 × 106)CFU.g-1 . while there wasn’t any growth of this bacteria by
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samples from approximately 1% to 3.2-4.4% after storage for 9 days. Acidity increased
considerably from 0.14% to 0.2%.
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storage and was found to decrease very little ( 1%).
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