نتایج جستجو برای: gamma irradiations
تعداد نتایج: 123589 فیلتر نتایج به سال:
Results of new activation cross-section measurements for production 178m1 Hf (T 1/2 = 4.0 s) and 179m1Hf 18.67 are presented the following reactions: 178 Hf(n,n´) Hf, 179 Hf(n,2n) 180Hf(n,3n)178m1Hf, 179m1 180 Hf. The irradiations were carried out at 7-MV Van de Graaff accelerator EC-JRC, Geel. Neutrons in 1-3 MeV energy range produced via 3 H(p,n) He reaction. Deuteron beam a deuterium gas tar...
The hydrolysis of nitriles in presence of NaY zeolite under microwave irradiations gives corresponding amide in high yield in few minutes.
N-Arylisatins are synthesized in high yield in shorter reaction time by the reaction of 2-oxo2-(Arylamino)acetates and arynes using NaY heterogeneous catalyst under microwave irradiations.
Germination of lettuce seeds (Lactuca sativa L. cv Grand Rapids) in the dark was nearly 100% at 20 degrees C but was inhibited at 27 degrees C and higher temperatures (thermoinhibition). A single 5-minute exposure to red light completely overcame the inhibition at temperatures up to 28 degrees C, above which the effectiveness of single light exposures gradually declined to reach a negligible le...
An anthropomorphic head phantom, constructed from a water-equivalent plastic shell with only a spherical target, was modified to include a nonspherical target (pituitary) and an adjacent organ at risk (OAR) (optic chiasm), within 2 mm, simulating the anatomy encountered when treating acromegaly. The target and OAR spatial proximity provided a more realistic treatment planning and dose delivery ...
By SIEGMUND J. BAUM, DONALD J. I IMELDORF AND ELLY M. ,JACOBSEN T HE HEMATOLOGIC EFFECTS of acute ionizing radiations have beemi described extensively in recent review articles.’ ‘ 2 , 4 The effects of prolonged exposure to low intensity radiations and the effects of dose fractionat.ion or periodic radiation exposures are somewhatmore difficult to interpret because of the complex interaction of...
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