Gamma Radiation Sensitivity of Malathion-Resistant Strains of the Indian Meal Moth1

1973 ◽  
Vol 66 (2) ◽  
pp. 461-462 ◽  
Author(s):  
John H. Brower
Keyword(s):  
Gamma Radiation ◽  
Radiation Sensitivity ◽  
Indian Meal ◽  
Resistant Strains

GAMMA RADIATION SENSITIVITY OF THE SPIDER BEETLE, GIBBIUM PSYLLOIDES (COLEOPTERA: PTINIDAE)

1972 ◽  
Vol 104 (10) ◽  
pp. 1551-1556 ◽  
Author(s):  
John H. Brower ◽  
Hilda C. Scott
Keyword(s):  
Gamma Radiation ◽  
Radiation Sensitivity ◽  
Radiation Resistant ◽  
Eggs And Larvae ◽  
All Treatment

AbstractThe effects of seven gamma radiation dosages from 5 to 100 krad on all metamorphic stages of the spider beetle, Gibbium psylloides (Czenpinski), were studied. Five kilorads prevented development of adults from treated eggs and larvae. Some adults emerged from the pupal cocoon at all treatment levels except 50 and 100 krad, but their longevity was greatly reduced. Adults were fairly resistant to sterilizing effects of the radiation. Twenty kilokrads was not completely sterilizing to either males or females, but fecundity was greatly reduced. The longevity of treated adults was significantly reduced, but some survived for 20 weeks after a 20-krad exposure. Adults and pupae of this species were more radiation resistant than were most other stored-product Coleoptera.

Gamma Radiation Sensitivity of Enterobacter sakazakii in Dehydrated Powdered Infant Formula

2006 ◽  
Vol 69 (6) ◽  
pp. 1434-1437 ◽  
Author(s):  
J. W. LEE ◽  
S. H. OH ◽  
J. H. KIM ◽  
H. S. YOOK ◽  
M. W. BYUN
Keyword(s):  
Radiation Dose ◽  
Gamma Radiation ◽  
Infant Formula ◽  
Marked Effect ◽  
Radiation Sensitivity ◽  
Sensory Properties ◽  
Hot Water ◽  
Powdered Infant Formula ◽  
Enterobacter Sakazakii ◽  
Nutritional Studies

The observed Enterobacter sakazakii D10-values for tryptic soy broth and dehydrated powdered infant formula were 0.27 ± 0.05 and 0.76 ± 0.08 kGy, respectively. A decrease of approximately 3 log in the dehydrated powdered infant formula was obtained by irradiation with 3.0 kGy or rehydration with hot water at 80°C. No recoverable bacteria were found in the powdered infant formula irradiated at 5.0 kGy and stored, either before or after rehydration. A radiation dose of up to 5.0 kGy had no marked effect on the sensory properties of the dehydrated powdered infant formula after rehydration and heating. Gamma radiation could potentially be used to inactivate E. sakazakii in dehydrated powdered infant formula; however, nutritional studies need to be conducted before the use of radiation can be recommended.

scholarly journals Incorporation of 5-substituted uracil derivatives into nucleic acids. The isolation and γ-radiation-sensitivity of bacteriophage T3 containing the thymine analogue 5-vinyluracil

1980 ◽  
Vol 187 (1) ◽  
pp. 257-260 ◽  
Author(s):  
E T J Chelton ◽  
M Duggan ◽  
R N Hunston ◽  
A S Jones ◽  
M K O'Leary ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Nucleic Acids ◽  
Gamma Radiation ◽  
Radiation Sensitivity ◽  
Γ Radiation ◽  
Uracil Derivatives ◽  
Phage Dna

Bacteriophage T3 was produced in a form that contained 32% of its normal DNA thymine residues replaced with 5-vinyluracil residues by infecting a thymine-requiring strain of Escherichia coli with phage T3 in a medium containing 5-vinyluracil. When 2′-deoxy-5-vinyluridine was added to the medium instead, no incorporation was observed into the phage DNA, and the presence of the deoxyribonucleoside severely decreased the number of viable phage particles produced. The analogue-containing phage, although initially viable, rapidly lost viability when stored, but it was no more sensitive than was normal phage T3 to the effect of gamma-radiation.

scholarly journals Effects of oxygen on aerosol survival of radiation sensitive and resistant strains ofEscherichia coliB

1971 ◽  
Vol 69 (4) ◽  
pp. 661-672 ◽  
Author(s):  
C. S. Cox ◽  
M. C. Bondurant ◽  
M. T. Hatch
Keyword(s):  
Escherichia Coli ◽  
Relative Humidity ◽  
Metabolic Activity ◽  
Radiation Sensitivity ◽  
The Other ◽  
E Coli ◽  
Radiation Induced ◽  
Resistant Strains ◽  
Resistant Mutants ◽  
Survival In Air

SUMMARYThe aerosol survivals in air and nitrogen of radiation sensitive and resistant mutants ofEscherichia coliB have been determined with logarithmic and resting phase bacteria. No consistent correlation was found between radiation sensitivity and aerosol sensitivity in the strains tested. Hence, the phenotypes Fil Her Exr, which determine sensitivity to radiation, do not influence aerosol survival, i.e. these known mechanisms which repair radiation-induced damage do not operate in aerosol stressedE. coli. In all cases the survival in air was less than that in nitrogen particularly so forE. coliBs-1. The effect is explained in terms of a toxic action of oxygen. Comparison of survival of log and resting phase bacteria show that log phase cells are less aerosol stable than are resting phase cells. The ability to synthesize DNA in bacteria collected from the aerosol was less than in control unstressed bacteria, and this effect was independent of the presence of oxygen. Reduced ability to synthesize DNA could have been caused by reduced metabolic activity. It is shown that two different death mechanisms occur simultaneously in aerosols at low relative humidity. One mechanism is oxygen dependent and the other oxygen independent. The former was not through a decrease in metabolic activity, whereas the latter could be.

scholarly journals Gamma radiation sensitivity in Nigella sativa L.

CYTOLOGIA ◽  
1986 ◽  
Vol 51 (3) ◽  
pp. 609-615 ◽  
Author(s):  
Animesh K. Datta ◽  
Amal K. Biswas ◽  
Subir Sen
Keyword(s):  
Gamma Radiation ◽  
Nigella Sativa ◽  
Radiation Sensitivity

scholarly journals Gamma Radiation Sensitivity of Different Stages of Saw-Toothed Grain Beetle Oryzaephilus Surinamensis L. (Coleoptera: Silvanidae)

2010 ◽  
Vol 50 (3) ◽  
pp. 250-255 ◽  
Author(s):  
Abbas Hosseinzadeh ◽  
Nouraddin Shayesteh ◽  
Hamid Zolfagharieh ◽  
Mohammad Babaei ◽  
Hasan Zareshahi ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Gamma Rays ◽  
Developmental Stages ◽  
Growth Index ◽  
Adult Emergence ◽  
Radiation Sensitivity ◽  
Oryzaephilus Surinamensis ◽  
Larval Emergence ◽  
Dose Dependent Increase ◽  
Dose Dependent

Gamma Radiation Sensitivity of Different Stages of Saw-Toothed Grain BeetleOryzaephilus SurinamensisL. (Coleoptera: Silvanidae)The effect of gamma irradiation on different developmental stages ofOryzaephilus surinamensisL., was investigated. Results showed that a required dose to prevent larval emergence from irradiated 1-2-days-old eggs was 60 Gray (Gy), and 350 Gy was required to prevent adult emergence from 15-days-old larvae. Also the required dose of radiation to prevent adult emergence from irradiated 5-days-old pupa was 700 Gy. The dose of 200 Gy caused 100% mortality of irradiated adults 28 days after treatment. In addition, the effect of gamma rays was studied on the developmental stage period of each irradiated stage till adult emergence. The results revealed that there was a dose-dependent increase of the developmental periods. The growth index of adults was significantly decreased with increasing dose of radiation administered to eggs, larvae and pupae. It is recommended that doses between 600 and 700 Gy should be used to control population growth ofO. surinamensiswhen targeting pupae and adults present in stored products.

Radiation Sensitivity of Successively Irradiated Generations of the Indian Meal Moth13

1972 ◽  
Vol 65 (3) ◽  
pp. 673-676 ◽  
Author(s):  
Mir M. Hossain ◽  
John H. Brower ◽  
Elvin W. Tilton
Keyword(s):  
Radiation Sensitivity ◽  
Indian Meal
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