Document Details

Document Type : Article In Journal 
Document Title :
TOXICOLOGICAL STUDIES OF CYANOBACTERIAL TOXIN OF OSCILLATORIA LIMNETICA ISOLATED FROM THE SOLAR LAKE IN SINAI
دراسات على سمية الطحالب الخضراء المزرقة -الأسيلاتوريا- المعزولة من بحيرة شمسية- سيناء
 
Document Language : Arabic 
Abstract : Toxic Cyanobacterial samples of Oscillatoria Umnetica. collected from the Solar Lake, Taba, Sinai was extracted and purified. Both the crude and semi pure extracts of the toxic cyanobacteria were subjected to different bioassays to test their toxic effect on mammals, insects, crustcean, and Fungi. The LD50 of Oscillatoria Umnetica crude extract against Musca domestica, Spodopetra littoralis and Agrotis ipsilon larvae were 1.9, 7.6, and 9.1 ^g /insect respectively while the LC50 of Culex pipens was 233 ppm. No activity was detected against the crustacean brine shrimp (Artemia salina) with concentration reached 2000 ppm. Also, no activity was detected against the tested 10 species of phytopathogenic fungi after exposure to different concentrations that reached 1600 ppm. Purification of the Oscillatoria Umnetica crude extract on molecular weight exclusion filters decreased the LD50 against mice from 2891 to 2010 mg/kg (30.5%) and against Musca domestica from 1.9 to 1.1 |0g/insect (42%). The highest decrease in LD50 due to the application of the purified material was observed in the case of Spodopetra littoralis where the LD50 decreased from 7.6 to 1.6 jig/insect (79%). The calculated LD50 of the crude extract for Musca domestica was 100 mg/kg indicating a higher susceptibility (~29X) of insects compared with mice to the Oscillatoria Umnetica toxic extract suggesting the safety of using such toxins as a pesticide 
ISSN : 2345 
Journal Name : Journal of Egyptian society for Toxicity 
Volume : 21 
Issue Number : 1 
Publishing Year : 1420 AH
1999 AD 
Article Type : Article 
Added Date : Saturday, January 8, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد نصر الدين محمد جمعةGomaa, Mohamed Nasr Eldin mohamedInvestigatorDoctoratemngomaa@gmail.com

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