Destruction of 1,1-dichloroethylene/air mixture under gamma-ray irradiation

2003 ◽  
Vol 91 (5) ◽  
Author(s):  
Y.-X. Sun ◽  
T. Hakoda ◽  
A. G. Chmielewski ◽  
S. Hashimoto
Keyword(s):  
Gamma Irradiation ◽  
Gamma Ray ◽  
Batch Reactors ◽  
Radiation Induced ◽  
Gamma Ray Irradiation ◽  
Induced Decomposition

SummaryRadiation-induced decomposition of 1,1-dichloroethylene(1,1-DCE)) in air was investigated in the experiment. The model gas prepared by mixing 1,1-dichloroethylene vapor with air was sealed in batch reactors and subjected to gamma irradiation. Inorganic products (CO+CO

Gamma-Ray Radiation-Induced Surface Hydrophobic Effects in Invar Alloy

2012 ◽  
Vol 482-484 ◽  
pp. 1585-1591 ◽  
Author(s):  
Cheng Fu Yang ◽  
Wei Wen Wang ◽  
Hsin Hwa Chen ◽  
Wei Tan Sun ◽  
Chi Lin Shiau ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Structural Changes ◽  
Gamma Ray ◽  
Small Deviation ◽  
Contact Angles ◽  
Invar Alloy ◽  
Hydrophobic Effects ◽  
Post Irradiation ◽  
Radiation Induced ◽  
Gamma Ray Irradiation

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.

Radiation Induced Surface Activation on SUS304 Rod Surface Coated With Thin Film Layer Formed by Vacuum Evaporation Method

2008 ◽  
Author(s):  
Jian Zhang ◽  
Kaichiro Mishima ◽  
Naoki Sugitani ◽  
Masahiro Hino ◽  
Tomoji Takamasa
Keyword(s):  
Gamma Ray ◽  
Vacuum Evaporation ◽  
Outer Diameter ◽  
Evaporation Method ◽  
Thin Film Layer ◽  
Radiation Induced ◽  
Gamma Ray Irradiation ◽  
Film Layer ◽  
Coated Surface ◽  
Coated Surfaces

In this study, the effect of film layer deposited on a metal surface by vacuum evaporation method on the RISA phenomenon was investigated from the view points of surface wettability and quenching velocity. Test rods were made of SUS304 with the outer diameter of 24mm and the length of 150mm. Four kinds of materials, i.e. titanium, zircaloy-II, germanium and silicon, were deposited separately on the half-circumference surface of a SUS304 rod with thickness of 200 nm. It was concluded that the RISA effect was observed on the film-coated surfaces after gamma-ray irradiation, which is similar to that on an oxide layer of SUS304 surface. It was also found that the quenching velocity on film-coated surfaces was much faster than that on an un-coated surface.

Radiation-induced reduction of diuron by gamma-ray irradiation

2008 ◽  
Vol 151 (2-3) ◽  
pp. 465-472 ◽  
Author(s):  
Jibiao Zhang ◽  
Zheng Zheng ◽  
Tan Zhao ◽  
Yongfu Zhao ◽  
Lianhong Wang ◽  
...  
Keyword(s):  
Gamma Ray ◽  
Radiation Induced ◽  
Gamma Ray Irradiation

scholarly journals Evaluasi Keragaman Genetik Mutan Harapan Generasi MV1 Jeruk Keprok SoE (Citrus reticulata Blanco) Berdasarkan Penanda Morfologi dan ISSR

2016 ◽  
Vol 7 (2) ◽  
pp. 102
Author(s):  
Indriati Husain ◽  
Agus Purwito ◽  
Ali Husni ◽  
Kikin H. Mutaqin ◽  
Slamet Susanto
Keyword(s):  
Genetic Diversity ◽  
Gamma Irradiation ◽  
Genetic Distance ◽  
Embryogenic Callus ◽  
Irradiation Dose ◽  
Gamma Ray ◽  
Morphological Diversity ◽  
Issr Markers ◽  
Citrus Reticulata ◽  
Gamma Ray Irradiation

<p class="Abstrak"><em>ABSTRACT</em><em></em></p><p><em>Mandarin’s SoE is national <del cite="mailto:Windows%207" datetime="2016-10-31T15:54"></del>variety originated <del cite="mailto:Windows%207" datetime="2016-10-31T15:55"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins>from Mount of Mutis, Sub District of SoE, of Timur Tengah Selatan (TTS) District, East Nusa Tenggara (NTT). The genetic diversity of citrus can be induced by gamma ray irradiation on embryogenic callus cells thus producing new mutants. <del cite="mailto:Windows%207" datetime="2016-10-31T15:55"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins><ins cite="mailto:Windows%207" datetime="2016-10-31T15:55"></ins><del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del>Genetic diversity detection can be <ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>based on morphological and ISSR markers. The aim of this research was <del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>to obtain information on the genetic diversity <del cite="mailto:Windows%207" datetime="2016-10-31T15:56"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins>on putative mutants<ins cite="mailto:Windows%207" datetime="2016-10-31T15:56"></ins> mandarin SoE induced by <ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>gamma ray irradiation <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del>based on morphology and markers ISSR. ISSR markers used are ISSR 1, 4, 6 and 8. Analysis of morphological diversity produced <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>a dendrogram with the level of similarity between individuals each irradiation dose 83-95% with <del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:57"></ins>5-17% genetic distance. Dendrogram analysis based on the genetic diversity ISSR markers showed high levels of 51-100% similarity and genetic distance 0-49%. Individuals<del cite="mailto:Windows%207" datetime="2016-10-31T15:57"></del> samples obtained from<del cite="mailto:Windows%207" datetime="2016-10-31T15:58"></del><del cite="mailto:Windows%207" datetime="2016-10-31T15:58"></del><ins cite="mailto:Windows%207" datetime="2016-10-31T15:58"></ins> gamma irradiation, based <ins cite="mailto:Windows%207" datetime="2016-10-31T15:58"></ins>both morphological and ISSR markers, was different from individual's genetic make up before irradiation.</em></p><p class="Abstrak"><em>Keywords</em><em>:</em><em> cluster, </em><em>gamma ray</em><em>, genetic distance, genetic diversity</em><em>s, </em><em>similarity</em></p><p class="Abstrak"> </p><p class="Abstrak">ABSTRAK</p><p>Jeruk keprok SoE adalah jeruk varietas unggul nasional yang berasal dari Pegunungan Mutis, Kecamatan SoE, Kabupaten Timur Tengah Selatan (TTS), Provinsi Nusa Tenggara Timur (NTT). Keragaman genetik jeruk ini dapat diinduksi dengan iradiasi sinar gamma pada sel-sel kalus embriogenik untuk menghasilkan mutan yang solid. Deteksi keragaman genetik yang terbentuk dapat dilakukan secara morfologi maupun molekuler dengan marka ISSR. Tujuan Penelitian ini adalah untuk mendapatkan informasi mengenai keragaman genetik yang terjadi pada mutan harapan jeruk keprok SoE hasil iradiasi sinar gamma berdasarkan morfologi dan marka ISSR. Marka ISSR yang digunakan adalah ISSR 1, 4, 6 dan 8 pada beberapa mutan harapan jeruk keprok SoE. Analisis keragaman secara morfologi menghasilkan dendrogram dengan tingkat kemiripan antar individu masing-masing dosis iradiasi 83-95% dengan jarak genetik 5-17%. Dendrogram analisis keragaman genetik berdasar marka ISSR memperlihatkan tingkat kemiripan 51-100% dan jarak genetik 0-49%. Individu-individu sampel yang diuji hasil iradiasi gamma, baik secara morfologi dan marka ISSR, telah memiliki susunan genetik yang berbeda dari susunan genetik individu sebelum diiradiasi.</p><p>Kata kunci: grup, jarak genetik, kemiripan, keragaman, sinar gamma</p>

Decomposition of Volatile Organic Compounds in Air by Electron Beam and Gamma Ray Irradiation

1998 ◽  
Vol 3 (1) ◽  
Author(s):  
Teruyuki Hakoda ◽  
Mingde Yang ◽  
Koichi Hirota ◽  
Shoji Hashimoto
Keyword(s):  
Electron Beam ◽  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Chlorine Atom ◽  
Gamma Ray ◽  
Batch Reactors ◽  
Aerosol Formation ◽  
Gaseous Compound ◽  
Volatile Organic ◽  
Gamma Ray Irradiation

AbstractRadiation decomposition and aerosol formation of various volatile organic compounds (VOCs) were examined to get information on a treatment of industrial off-gas. Model gases, air containing aromatic VOCs, chloroethenes and 1,2-dichloroethane, were sealed in batch reactors and irradiated with electron beam (EB) and gamma ray. For aromatic VOCs, G-values of decomposition in gamma ray irradiation were about 1.5 times larger than those in EB irradiation. The ratios of aerosol formation to decomposed aromatic VOCs were ranged from 30 to 66% on the basis of carbon. For chloroethenes except monochloroethylene, G-values of decomposition were 6 to 45 times larger than those of aromatic VOCs and the irradiated product was mainly gaseous compound. The G-values of decomposition in EB irradiation increased markedly with increase of chlorine atom in a molecule, while those in gamma ray irradiation were almost kept constant.

scholarly journals Improving Performance of Coleus through Mutation Induction by Gamma Ray Irradiation

2015 ◽  
Vol 2 (1) ◽  
pp. 26-32
Author(s):  
Syarifah Iis Aisyah ◽  
Yodi Marthin ◽  
M. Rizal M. Damanik
Keyword(s):  
Gamma Irradiation ◽  
Dose Level ◽  
Gamma Ray ◽  
Lethal Dose ◽  
Mutation Induction ◽  
Coleus Blumei ◽  
Irradiation Treatment ◽  
Gamma Ray Irradiation ◽  
Number Of Leaves ◽  
Short Time

The objective of this study is to study the effect of gamma ray irradiation (15, 30, 45, and 60 gray (Gy) to determine Lethal Dose 50 (LD50) values, and to obtain new Coleus variances in a relatively short time. The study was conducted in a greenhouse at Cikabayan experimental field, Bogor Agricultural University, Darmaga, Bogor in May to July 2013. Gamma irradiation treatment significantly affected height, number of leaves, and number of nodes. Increasing the dose level of gamma irradiation tend to inhibit plant growth. LD50 for yellow/green, green/brown, variegated green/brown of Coleus blumei, and Coleus amboinicus Lour were 48.66, 65.2, 52.81, and 37.62 Gy respectively. C. amboinicus  irradiated at a dose level of 45 Gy had different leaf shapes compared to control. Keywords:  Coleus, gamma ray irradiation, LD50 values, ornamental plant, torbangun

Combined Effects of Gamma-Ray Radiation and Repeated Hot-then-Cold Stresses on the Springback Degradation in Invar Alloy

2012 ◽  
Vol 248 ◽  
pp. 14-19
Author(s):  
Cheng Fu Yang ◽  
Wei Wen Wang ◽  
Hsin Hwa Chen ◽  
Chih Hung Chu ◽  
Wei Tan Sun ◽  
...  
Keyword(s):  
Cold Stress ◽  
Structural Changes ◽  
Gamma Ray ◽  
Xrd Analysis ◽  
Linear Increase ◽  
X Ray Diffraction ◽  
Radiation Induced ◽  
Gamma Ray Irradiation ◽  
Stress Cycles ◽  
Induced Defects

In this paper, we report the characterization of springback degradation of an Invar sheet with a combination of gamma-ray irradiation and repeated hot-then-cold stresses. The springback factor value of fresh Invar without radiation shows a linear increase with the number of hot-then-cold stress cycles. Continuous springback degradations are observed as the number of hot-then-cold stress cycles reaches 100. When the Invar sheet is subjected to gamma-ray irradiation, the springback factor is greater than that of the repeated hot-then-cold stressed samples. After applying the repeated hot-then-cold stresses to the post-irradiated Invar sheets, the springback factors are first restored to the value of fresh Invar, and then revert to an increasing trend. Our previous X-ray diffraction (XRD) analysis excluded the crystalline structural changes in the post-irradiated Invar. It is believed that the radiation-induced defects, which are closely related to the springback degradation, are possibly annealed during the first 20 hot-then-cold stress cycles. These cycles ultimately dominate the springback behavior of the stressed Invar sheets.

Radiation-induced degradation of cyclohexanebutyric acid in aqueous solutions by gamma ray irradiation

2015 ◽  
Vol 109 ◽  
pp. 17-22 ◽  
Author(s):  
Wenbao Jia ◽  
Yanquan He ◽  
Yongsheng Ling ◽  
Daqian Hei ◽  
Qing Shan ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Gamma Ray ◽  
Radiation Induced ◽  
Gamma Ray Irradiation

scholarly journals Clinical Symptoms and Histological Changes in Poecilia reticulata following Gamma-Ray Irradiation

2006 ◽  
Vol 75 (4) ◽  
pp. 557-560 ◽  
Author(s):  
K. Beňová ◽  
V. Cigánková ◽  
M. Falis ◽  
B. Šmajda
Keyword(s):  
Food Intake ◽  
Gamma Irradiation ◽  
Survival Data ◽  
Poecilia Reticulata ◽  
Gamma Ray ◽  
Clinical Symptoms ◽  
Histological Findings ◽  
Histological Changes ◽  
Relative Mortality ◽  
Gamma Ray Irradiation

Lethality, food intake, clinical symptoms and terminal histological changes were followed after gamma-irradiation with doses of 10, 20, 30, 35 and 40 Gy in guppy, Poecilia reticulata. Clinical symptoms, food intake and longevity were also monitored in the progeny of fish irradiated with a dose of 10 Gy. In the first days after irradiation timidity and lethargy were observed. After doses of 30, 35 and 40 Gy, these symptoms were accompanied with anorexia. The most prominent clinical symptoms observed were emaciation, hampered breathing, exophthalmia and haemorrhages. Histological findings corresponded with these symptoms. In the fish irradiated with 10 or 20 Gy the progeny survived, after a dose of 30 Gy the progeny died within 24 hours after birth and after doses of 35 and 40 Gy dead progeny was born. The survival data provide an estimate of LD50/30 equal to 29 Gy. Higher relative mortality and more severe clinical symptoms were observed in females. The progeny of irradiated parent fish grew and survived for 3 months maximum.

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