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Isolation and Identification of Some Strains of Lactic Acid Bacteria from Raw Camel and Shami Goat Milk and Study Some of their Biochemical and Industrial Characteristics

عزل وتعريف بعض سلالات بكتريا حمض اللبن من الحليب الخام للنوق والماعز الشامي ودراسة بعض خصائصها الكيميائية الحيوية والتصنيعية

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 Publication date 2014
and research's language is العربية
 Created by Shamra Editor




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طيفور أنطون 1988 الألبان - الجزء النظري - مطبعة الاتحاد - جامعة دمشق
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Four strains of lactic acid bacteria (LAB) from different genus، species and sources were tested for their abilities to bind of AFM1 for 14 hours. Lactobacillus rhamnosus LC705 showed higher ability to bind AFM1 (88.35%)، followed by Bifidobacteri um bifidum BG1 (84.21%), Lactobacillus bulgaricus R21 by 80.41% and finally Streptococcus thermophilus by 71.52% after 14 hours of incubation.
This research was conducted at the Faculty of Agriculture, Department of Food Science laboratories to isolate lactic acid bacteria from some Syrian milk products (milk, yogurt, cheese) and determine some morphological, physiological characteristic and the ability of these isolates to ferment sugars.
This research was conducted in the Agriculture Faculty- Food Science Department, Damascus University, for detecting Lactic acid bacteria isolated from Syrian dairy products (white fresh cheese-Leben), Samples were collected from August, 2004 to Oc tober, 2005 from different areas in Syria. Analysis was done for 245 bacterial isolates from 40 samples of white fresh cheese and 58 samples of yogurt (curd). Results showed that the genus Enterococcus was dominant with a percentage of 47.52%; Pediococcus had a percentage of 26.3 %; while Lactococcus had a percentage of 15.38% with only 3.2% for Lactobacillus.
Three hundreds and thirty samples of raw milk and some of the Syrian dairy products collected during 2002-2003 from different areas of Syria, and were used to detect the presecne of Listeria in these products. Results indicated that mainly L. mono cytogenes and to a lesser degree L.innocua and L.ivanovii were found in these products. The perecentage of violating of the Syrian standards was 4 % in raw milk, 0.0% in pasteurized milk, 2% in white cheese, 0.5% in shinglish and 0.0% in ice cream. And it has been deterhmined the identity of the isolated bacterial species of Listeria from the above-mentioned products, where L. monocytogenes was dominant, and to a lesser estent were L. innocua and L. ivanovii.
This study was conducted at the laboratory of Food Science Department, Agriculture College, Damascus University to isolate and characterize of Lactobacilli bacteria from some Syrian foods and detection the effectiveness of anti-pathogenic bacteria l growth. Lactic acid bacteria from different dairy products, pickles and dried plant samples were isolated and identified according to common characteristics. Results showed that twenty-three isolates were rods while only 2 of the them were coccid. These isolates were tested for their antimicrobial effect against pathogenic bacteria for both gram positive bacteria (Staphylococcus aureus) and gram negative bacteria (Klebsiella pneumonia and Escherichia coli). Fifteen isolates demonstrated antimicrobial effect against the three tested bacteria, of which CP50 and CP46 isolates showed the best antimicrobial effect. Results of the standard physiological and biochemical tests identified fourteen isolates as Lactobacillus plantarum and one isolate as Lactobacillus fermentum.

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