RELATIVE EFFECTIVENESS OF 14 Mev NEUTRONS AND 200 KVP X-RAYS FOR PRODUCTION OF LETHALITY IN GRASSHOPPER EMBRYOS. A PRELIMINARY STUDY (thesis)

Technical Report · Tue May 01 04:00:00 EDT 1962

OSTI ID:4820909

Bicker, A E

A test system using the grasshopper embryo with hatching as the criterion for the end-point was proposed to determine the relative effectiveness of 14 Mev neutrons and 200 kvp x rays. Eggs of Chortophaga (14 day) and Encoptolophus (14 day and terminal) were subjected to various doses of both radiations. Values for the medial lethal doses from the data obtained were 650 rads for Chortophaga, 760 rads for Encoptolophus (14 day), and 1800 rads for Encoptolophus (terminal). The shape of the dose-effect curve relative to x- irradiation survival was assumed to be unchanged so that an estimate of the LD/ sub 50/ could be made. The value obtained was 370 rads. The RBE of 14 Mev neutrons and 200 kvp x rays on Chortophaga (14 day) embryos was 1.76. It was concluded that Chortophaga and Encoptolophus embryos irradiated in the 14 day development stage with hatching as an end-point constitute valid systems for the measurement of the relative effectiveness of the 14 Mev neutrons and 200 kvp x rays. (P.C.H.)

• Research Organization: Kansas. Univ., Lawrence
• NSA Number: NSA-16-023413
• OSTI ID: 4820909
• Report Number(s): TID-15962
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BIOLOGY AND MEDICINE
EGGS
EMBRYOS
ENCOPTOLOPHUS
ENERGY LEVELS
FAST NEUTRONS
GRASSHOPPERS
INSECTS
LETHAL DOSE
LIFETIME
QUANTITATIVE ANALYSIS
RADIATION DOSES
RADIATION EFFECTS
X RADIATION