Effect of radiation dose of Gamma-Ray irradiation on volume gratings using liquid crystal composites

In this paper, we report a new phenomenon observed in the gamma-ray radiation-induced hydrophobic effects on an Invar surface: When the Invar alloy is subjected to different doses of gamma-ray irradiation, the contact angle increases with the radiation dose. Invar samples with exposed to a higher dose appear more hydrophobic, but this tendency disappears following post-irradiation etching. The contact angles of the irradiated and etched Invar samples can be restored back to a stable value with small deviation after 30 min of annealing at 150°C. X-ray diffraction (XRD) analysis found no crystalline structural changes. High resolution field emission scanning microscope (FE-SEM) analyses showed that irradiation might induce crack-like surfaces which could be removed at higher radiation dose in the following acid etchings. It is believed that the chemical bonds of Invar oxide on the surface were broken by the gamma-ray irradiation, thus raising the likelihood of binding with free ions in the air and resulting in the exclusion of the hydrophilic OH bonds, leaving a hydrophobic post-irradiation Invar surface.

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Tolerance of holographic polymer-dispersed liquid crystal memory for gamma-ray irradiation

Applied Optics ◽

10.1364/ao.56.004854 ◽

2017 ◽

Vol 56 (16) ◽

pp. 4854 ◽

Cited By ~ 6

Author(s):

Akifumi Ogiwara ◽

Minoru Watanabe ◽

Yoshizumi Ito

Keyword(s):

Liquid Crystal ◽

Gamma Ray ◽

Polymer Dispersed Liquid Crystal ◽

Polymer Dispersed ◽

Gamma Ray Irradiation

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Morphological, cytological, and molecular variations induced by gamma rays in ground-grown chrysanthemum ‘Pinkling’

Canadian Journal of Plant Science ◽

10.1139/cjps-2019-0064 ◽

2020 ◽

Vol 100 (1) ◽

pp. 68-77

Author(s):

Jian-Hui Wu ◽

Jing Zhang ◽

Feng Lan ◽

Wei-Fang Fan ◽

Wen Li

Keyword(s):

Radiation Dose ◽

Gamma Ray ◽

Issr Markers ◽

Floral Colour ◽

Banding Patterns ◽

Γ Radiation ◽

Gamma Ray Irradiation ◽

Dissimilarity Coefficients ◽

Different Doses ◽

Issr Primers

In this study, we analyzed the morphological, cytological, and molecular changes induced by different doses of 60Co-γ radiation on root cuttings of the ground-grown chrysanthemum ‘Pinkling’ plants whose survival and height were decreased with increasing radiation dose. A variety of mutants were observed among irradiated ‘Pinkling’ plants; floral mutations included alteration of floral types, term ligulate floret number, capitulum diameter, and floral colour. Meiotic observation of mutants showed that the frequency of chromosome aberrations increased with radiation dose. The mutants were further analyzed using ISSR markers and on the basis of polymorphic DNA banding patterns, floral mutants were genotypically distinguished. Eighteen polymorphic ISSR primers produced 110 scorable bands, of which 93 (84.5%) were polymorphic. The percentage of polymorphism ranged from 60% to 100%. Jaccard’s dissimilarity coefficients varied from 0.337 to 1.000, which attested to the high genetic variability induced by irradiation. It is concluded that gamma ray irradiation induces a sufficient frequency of mutations and that ISSR analysis may offer a useful molecular marker for the detection of mutants in chrysanthemum. The present findings provide valuable information for future breeding of ‘Pinkling’.

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Resistance evaluation of holographic polymer-dispersed liquid crystal memory for gamma-ray irradiation

2017 22nd Microoptics Conference (MOC) ◽

10.23919/moc.2017.8244556 ◽

2017 ◽

Author(s):

Akifumi Ogiwara ◽

Minoru Watanabe ◽

Yoshizumi Ito

Keyword(s):

Liquid Crystal ◽

Gamma Ray ◽

Resistance Evaluation ◽

Polymer Dispersed Liquid Crystal ◽

Polymer Dispersed ◽

Gamma Ray Irradiation

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Performance Of Mentik Wangi Rice Generation M1 From The Results Of Gamma Ray Irradiation

Agrosains: Jurnal Penelitian Agronomi ◽

10.20961/agsjpa.v19i1.20922 ◽

2017 ◽

Vol 19 (1) ◽

pp. 6

Author(s):

Ahmad Yunus ◽

Sri Hartati ◽

Raden Dirgori Kuneng Brojokusumo

Keyword(s):

Radiation Dose ◽

Gamma Ray ◽

Genetic Mutation ◽

Individual Plant ◽

Rice Varieties ◽

Gamma Ray Irradiation ◽

Average Control ◽

Strain Number ◽

Productive Tiller ◽

The Village

<p>Mentik wangi is one of the local rice varieties in Indonesia less attractive to farmers. That is because the rice Mentik wangi has some weakness, namely a long harvest time, easy to collapse, and the results less than the maximum productivity. To increase the interest of farmers in rice cultivation Mentik wangi, then an attempt is made to improve the quality of rice Mentik wangi properties with plant breeding techniques one of which is a genetic mutation using gamma radiation. This study was conducted to determine the performance (performance) of rice Mentik wangi (M1) results of gamma-ray radiation that is expected to have a positive properties of new or better than its origin. This research was conducted in paddy fields in the village of Nangsri Lor, District Kebakkramat, Karanganyar and implemented in September 2015 to January 2016. Data were analyzed by descriptive with sorting and comparing each individual plant at each radiation dose to the average control accurately and objective. The results showed that gained some plants that could potentially be a mutant plant that has better properties (positive) that appears at the variable plants from each individual plant, ie the number of lines T16 with a radiation dose of 300 gray tall plants are very short 86 cm, strain number T204 with a radiation dose of 200 gray pick the highest panicle length of 33.5 cm, strain number T133 with a radiation dose of 100 gray has a total number of tillers and productive tiller high of 17 rods (total) and 11 rods (productive), strain number T133 with radiation dose of 200 gray had the highest number of filled grain and 624 grain strain T70 numbers with a radiation dose of 100 gray had the highest percentage of filled grain at 96%, and the number of lines T (1-7) with a radiation dose of 100 gray and strain number T ( 1-9) with a radiation dose of 200 gray had a shorter harvesting time is 110 days.<strong></strong></p>

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The effects induced by the gamma-ray responsible for the threshold voltage shift of commercial p-channel power VDMOSFET

Nuclear Technology and Radiation Protection ◽

10.2298/ntrp1801081o ◽

2018 ◽

Vol 33 (1) ◽

pp. 81-86 ◽

Cited By ~ 7

Author(s):

Marija Obrenovic ◽

Milic Pejovic ◽

Djordje Lazarevic ◽

Nenad Kartalovic

Keyword(s):

Radiation Dose ◽

Threshold Voltage ◽

Gamma Ray ◽

Dose Range ◽

Gate Bias ◽

Threshold Voltage Shift ◽

Voltage Shift ◽

Channel Power ◽

Radiation Induced ◽

Gamma Ray Irradiation

The variations in the threshold voltage shift in p-channel power VDMOSFET during the gamma ray irradiation was investigated in the dose range from 10 to 100 Gy. The investigations were performed without the gate bias and with 5 V gate bias. The devices with 5 V gate bias exhibit a linear dependence between the threshold voltage shift and the radiation dose. The densities of radiation-induced fixed and switching traps were determined from the sub-threshold I-V characteristics using the midgap technique. It was shown that the creation of fixed traps is dominant during the irradiation. The possible mechanisms responsible for the fixed and switching traps creation are also analyzed in this paper.

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