000			01959cab a2200337Ia 45 0
001			u186694
003			SIRSI
008			101102s2007 ua ss b eng d
040			_aEAL
090			_aART JGEB V5 No1-2 5
100	1		_aTalkhan, Fatma N.
240	1	0	_aJournal of genetic engineering and biotechnology, 2007.v. 5 (1-2) _h[electronic resource].
245	1	0	_aEffect of UV treatments on the activity of delta-endotoxin protein crystals in Bacillus thuringiensis _h[electronic resource].
300			_ap.33-42.
504			_aIncludes references.
520			_aThe ability of some isolates of B.thuringiensis to produce dark brown pigment were measured as an indicator to UV resistant, Ms isolate was used as wild type to improve it to be more resistant to UV, upon. It exposed to UV irradiation with different periods, ranged between 1 to 10 hrs. The induced mutants were examined morphologically by phase contrast microscope. 144 mutants were obtained, ten ofthem were selected and tested for their toxicity against Spodoptera littorallis. The results showed that mutants 62, 64 and 85 were the most toxic ones. These three mutants and wild type were examined by transmission electron microscope. Crystal proteins, with bipyramidial shape and active against Lepidoptera insects, were detected in all the selected mutants.
650		0	_aBacillus thuringiensis.
650		0	_aBacillus thuringiensis _xToxicology
650		0	_aEndotoxins _xPhysiological effect.
650		0	_aUltraviolet radiation.
650		3	_adelta-endotoxins.
650		3	_aentomopathogenic bacteria.
700	1		_aAbo-assy, H. H.
700	1		_aSoliman, Kh. A.
700	1		_aAbdel-Razek, A. S.
700	1		_aAzzam, Marwa M.
700	1		_aAbdelsalam, A. Z. E.
773	0		_tJournal of genetic engineering and biotechnology. _g2007.v.5(1-2) _x1687-157X _7nnas _wu186667
856	4	0	_uhttp://nile.enal.sci.eg/EALE/2007/JGEB/507/1/33.pdf _zFull Text Article
596			_a1
942			_cAR _2lcc
999			_c41810 _d41810