Recombination and Trapping in 60Co Gamma‐Irradiated n‐Type Germanium

1966 ◽  
Vol 37 (8) ◽  
pp. 3145-3152 ◽  
Author(s):  
B. G. Streetman
Keyword(s):  
60Co Gamma ◽  
Gamma Irradiated

Close to midgap trapping level in 60Co gamma irradiated silicon detectors

2002 ◽  
Vol 81 (1) ◽  
pp. 165-167 ◽  
Author(s):  
I. Pintilie ◽  
E. Fretwurst ◽  
G. Lindström ◽  
J. Stahl
Keyword(s):  
Silicon Detectors ◽  
Trapping Level ◽  
60Co Gamma ◽  
Gamma Irradiated

scholarly journals Comparative Analysis of Volatile Compounds of Gamma-Irradiated Mutants of Rose (Rosa hybrida)

2020 ◽  
Author(s):  
Jaihyunk Ryu ◽  
Dong-Gun Kim ◽  
Jung Min Kim ◽  
Jae Il Lyu ◽  
Yeong Deuk Jo ◽  
...  
Keyword(s):  
Essential Oils ◽  
Volatile Compounds ◽  
Hierarchical Cluster ◽  
Flower Color ◽  
Gas Chromatography Mass Spectrometry ◽  
Color Mutant ◽  
60Co Gamma ◽  
Gamma Irradiated ◽  
The Rose ◽  
Selection Of

Roses are one of the most important floricultural crops, and their essential oils have long been used for cosmetics and aromatherapy. We investigated the volatile compound compositions of 12 flower-color mutant variants and their original cultivars. Twelve rose mutant genotypes were developed by treatment with 70 Gy of 60Co gamma irradiation of six commercial rose cultivars. Essential oils from the flowers of the 18 genotypes were analyzed by gas chromatography–mass spectrometry. Seventy-seven volatile compounds were detected, which were categorized into five classes: hydrocarbons, terpenoids, alcohols, esters, and others. Hydrocarbons, alcohols, and esters were major components in all rose flowers. The mutant genotypes CR-S8 and CR-S9 showed higher contents of hydrocarbons than the original cultivar. In addition, CR-S1, CR-S3, and CR-S4 mutant genotypes showed higher ester contents than their original cultivar. Nonacosane, 2-methylhexacosane, and 2-methyltricosane were major volatile compounds among all genotypes. Hierarchical cluster analysis of the rose genotypes gave four groups according to grouping among the 77 volatile compounds. These findings will be useful for the selection of rose genotypes with improved volatile compounds.

Use of the successive self-nucleation and annealing technique to characterize 60Co gamma irradiated HDPEs

2010 ◽  
Vol 103 (2) ◽  
pp. 669-678 ◽  
Author(s):  
Blanca Rojas de Gáscue ◽  
José Luis Prin ◽  
Gilma Hernández ◽  
Enrique M. Vallés ◽  
Arnaldo T. Lorenzo ◽  
...  
Keyword(s):  
60Co Gamma ◽  
Gamma Irradiated

Study of the radiomodifier effect of Pityrocarpa moniliformis extract

2019 ◽  
Vol 7 (2A) ◽  
Author(s):  
João Victor Torres de Moraes ◽  
Ricardo Luiz Calazans Luna Filho ◽  
Williams Nascimento de Siqueira ◽  
Hianna Arely Milca Fagundes Silva ◽  
Dewson Rocha Pereira ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Cellular Response ◽  
Biomphalaria Glabrata ◽  
Toxicity Tests ◽  
Antioxidant Compounds ◽  
Blastula Stage ◽  
Natural Substances ◽  
60Co Source ◽  
60Co Gamma ◽  
60Co Gamma Radiation

Ionizing radiation has been applied in several areas of knowledge, among them the study of the radiomodifier activity of natural substances. These substances can modify the cellular response to the damage induced by the radiation. Therefore, this work aimed to evaluate the radiomodifier action of Pityrocarpa moniliformis extract on Biomphalaria glabrata embryos exposed to 60Co gamma radiation. Initially, toxicity tests were performed on the extract against the B. glabrata embryos for the choice of concentration that did not cause death and embryonic malformation. Then, the antioxidant activity of the P. moniliformis extract with flavonoids and phenolic compounds was evaluated by means of the ABTS method. To evaluate the radiomodifier activity of the extract, embryos were selected in the blastula stage and irradiated with 7.5 Gy in a 60Co source (gammacell-Co60). Then, the embryos were exposed for 24 h to the extract of P. moniliformis at a concentration of 250 μg/mL. The results showed that the extract of P. moniliformis presents flavonoids and enzymatic inhibition by ABTS, which demonstrates the presence of antioxidant compounds. However, the tests of the radiomodifier activity did not present radioprotective effect for embryos exposed to ionizing radiation.

Presentation of Gamma-Irradiated-in-Air Polyethylene Wear in the Form of a Synovial Cyst

2003 ◽  
Vol 13 (5) ◽  
pp. 413-418
Author(s):  
Bryan T. Edwards ◽  
Patrick B. Leach ◽  
R. Scott Corpe ◽  
Robert D. Zura ◽  
Timothy R. Young
Keyword(s):  
Polyethylene Wear ◽  
Synovial Cyst ◽  
Gamma Irradiated

Employing Gamma Ray Irradiated Giardia lamblia as Trialed Vaccine in Experimental Animal

2019 ◽  
Vol 9 (02) ◽  
Author(s):  
Amal Kamil Abdul Sada ◽  
Amany Mohamed Al-Kaysi
Keyword(s):  
Giardia Lamblia ◽  
Gamma Ray ◽  
Age Groups ◽  
Active Phase ◽  
Study Groups ◽  
Negative Control ◽  
Control Group ◽  
High Dose ◽  
Histopathological Changes ◽  
Gamma Irradiated

This is an experimental trial to prepare a vaccine from gamma-irradiated Giardia lamblia which is evaluated in experimental animals. The study was conducted from December 2015 to April 2016. The field survey of the parasite was conducted from those patients attending the laboratories of the Alawi Children's Hospital in Rusafa and the Al-Yarmouk Teaching Hospital in Karkh, through which 1250 stool samples of different age groups were examined. Five groups of mice were used in the study; the first was injected with normal saline and considered as a negative control group, the second was injected with cystic form of non-irradiated Giardia lamblia and considered as a positive control group, whereas the other three groups were injected with gamma irradiated Giardia lamblia at three different doses 10, 15 and 25 rad respectively. Giardia lamblia was primarily cultivated in liver infusion agar for ten days to obtain the active phase. On the sixth day, the cystic phase was purified and standardized to be used in the infection of mice with or without the exposure of gamma rays. Mice showed high sensitivity to parasitic infestation, in the gamma non-irradiated and the irradiated with gamma 10 rad, and 15 rad irradiated groups which was 100%. The results expressed an excystation process of the depleted phases and the release of the feeder phases. The results of the three irradiated groups consisted of histopathological changes of the small, and the rectum by dissection after two weeks of infection, with intestine amputation lesions, as well as ulceration and inflammation of the inflammatory cells represented in small numbers of neutrophil, lymphocytes, and eosinophils. The presence of ulceration and fall of epithelial cells in the intestinal cavity has been shown, and different forms of the parasite have been observed. Mice which was injected with irradiated G lamblia at high dose (25 rad), not show and sensitivity to the challenge infection and no excystation of thy parasite had been done. After 2 wreaks, a comparison was achieved between all study groups in which no histopathological changes were noticed in the mice irradiated with dose of25 rad. After another two weeks, a challenge dose was given (un-attenuated G lamblia) and mice were dissected after another two weeks, no changes on the level of histopathology of intestinal tissue were noticed the results suggested that mice acquire an immunity against the parasite infection.

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