جرى في إطار هذا البحث عزل البكتريا التابعة للجنس Bacillus من بعض الترب السورية في محافظة دمشق وريفها ومحافظتي درعا والقنيطرة. درست بعض الخواس المورفولوجية والمزرعية والبيوكيميائية للمستعمرات وجرى انتخاب العزلات المنتجة لأنزيم السيلولاز وقد تراوح متوسط أقطار الهالات للعزلات المنتجة بين 1و 3.6 سم وكفاءة التحليل بين 1.1 و 4 , تم تصنيف 20 عزلة من اصل 65 عزلة منتجة للأنزيم باستخدام نظام ( API 50 CH) جرى عزل الـ DNA باستخدام طريقة مرجعية معدلة .
In the framework of this research, bacteria belonging to the genus Bacillus were isolated from some Syrian soils in the governorate of Damascus and its countryside, and the governorates of Daraa and Quneitra. Some morphological, agricultural and biochemical traits of the colonies were studied and the isolates producing cellulase enzyme were selected. The average diameters of the halos of the produced isolates ranged between 1 and 3.6 cm and the analysis efficiency ranged between 1.1 and 4, 20 out of 65 isolates producing the enzyme were classified using the (API 50 CH) system. DNA using a modified reference method.
References used
Atlas P 1998 Bile Esculin Test . Exercises for the microbiology laboratory
The conditions for producing cellulase enzyme were optimized using corn
husks as substrate in submerged fermentation. The effects of five parameters
(incubation temperature, pH, substrate concentration, inoculum volume,
fermentation time) on the s
The study was conducted in 2016. The samples of rice Oryza sativa L. straw
were collected from Dewania governorate/Iraq, and were brought to laboratory of
Directorate of Environmental and Water in Ministry of Science and Technology.
The samples we
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
40 samples were collected from milk from Homs to isolate the
bacteria and study their ability to produce the enzyme β-
galactosidase and diagnose isolates the most efficient in the
production of the enzyme, the results showed the presence of 25
sporeforming isolates producing the enzyme β-galactosidase , the
effectiveness of β-galactosidase was estimated using
spectrophotometer at a wavelength of 420 nm.
Four isolates of Streptomyces sp., St.1 and St.2 were isolated
from garden soil of science faculty, St.3 and St.4 were isolated
from Al-Shameia soil Lattakia, by serial dilution on Starch Casein
Agar medium.