Electron-beam irradiation as a quarantine treatment against red mite on exported cut flower of Chrysanthemum

2021 ◽  
Vol 6 (2) ◽  
pp. 47-51
Author(s):  
Thi Ly Nguyen ◽  
Thi The Doan ◽  
Kim Lang Vo Thi ◽  
Van Chung Cao
Keyword(s):  
Electron Beam ◽  
Irradiation Dose ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Developmental Stages ◽  
Observation Time ◽  
Hatching Rate ◽  
Potential Treatment ◽  
Cut Flower ◽  
Beam Irradiation

Utilization of phytosanitary irradiation as a potential treatment to disinfest agricultural commodities in trade has expanded rapidly in the recent years. In this study, red mites (Tetranychus sp) isolated from cut Chrysanthemums were treated by electron beam irradiation at doses of 100, 200, 300 and 400 Gy. After irradiation, they were kept at room temperature to determine the effects of electron beam irradiation on red mite at different developmental stages (eggs, nymphs and adults) and the reproduction of female adults. The results showed that the pattern of tolerance to irradiation in red mite was eggs < 2nd instars < adults, in which the adults were the most tolerance stage. The number of eggs laid by the irradiated female mites and the hatching rate significantly decreased when the irradiation dose increased. The hatching rate of eggs at 300 Gy was 4.25% and no larvae F1 survived during observation time. It could be concluded that 300 Gy is the effective quarantine dose for red mite infesting on cut chrysanthemums.

Optimization of the Display Parameters of a Room Temperature Nematic Material (6CHBT) by Using Electron Beam Irradiation

2010 ◽  
Vol 6 (1) ◽  
pp. 8-13 ◽  
Author(s):  
Rohit Verma ◽  
Ravindra Dhar ◽  
M. C. Rath ◽  
Sisir K. Sarkar ◽  
V. K. Wadhawan ◽  
...  
Keyword(s):  
Electron Beam ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Beam Irradiation

scholarly journals Radiation Processing and Characterization of Some Ethylene-propylene-diene Terpolymer/Butyl (Halobutyl) Rubber/Nanosilica Composites

Polymers ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2431
Author(s):  
Elena Manaila ◽  
Anton Airinei ◽  
Maria Daniela Stelescu ◽  
Maria Sonmez ◽  
Laurentia Alexandrescu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Water Uptake ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Rubber Matrix ◽  
Scanning Electron Microscopy Data ◽  
Beam Irradiation ◽  
Ethylene Propylene ◽  
Ethylene Propylene Diene Terpolymer

Composites based on ethylene–propylene–diene terpolymer (EPDM), butyl/halobutyl rubber and nanosilica were prepared by melt mixing and subjected to different doses of electron beam irradiation. The effect of irradiation dose on the mechanical properties, morphology, glass transition temperature, thermal stability and water uptake was investigated. The efficiency of the crosslinking by electron beam irradiation was analyzed by Charlesby–Pinner parameter evaluation and crosslink density measurements. The scanning electron microscopy data showed a good dispersion of nanosilica in the rubber matrix. An improvement in hardness and 100% modulus was revealed by increasing irradiation dose up to 150 kGy. The interaction between polymer matrix and nanosilica was analyzed using the Kraus equation. Additionally, these results indicated that the mechanical properties, surface characteristics, and water uptake were dependent on crosslink characteristics.

Coalescence between Au nanoparticles as induced by nanocurvature effect and electron beam athermal activation effect

Nanoscale ◽  
2018 ◽  
Vol 10 (17) ◽  
pp. 7978-7983 ◽  
Author(s):  
Liang Cheng ◽  
Xianfang Zhu ◽  
Jiangbin Su
Keyword(s):  
Electron Beam ◽  
Electron Microscope ◽  
Transmission Electron Microscope ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Au Nanoparticles ◽  
Beam Irradiation ◽  
Activation Effect ◽  
Transmission Electron

The coalescence of two single-crystalline Au nanoparticles on surface of amorphous SiOxnanowire, as induced by electron beam irradiation, wasin situstudied at room temperature in a transmission electron microscope.

Changes in characteristics of Pt-functionalized RGO nanocomposites by electron beam irradiation for room temperature NO2 sensing

2020 ◽  
Vol 46 (13) ◽  
pp. 21638-21646
Author(s):  
Ali Mirzaei ◽  
Jae Hoon Bang ◽  
Myung Sik Choi ◽  
Seungmin Han ◽  
Ha Young Lee ◽  
...  
Keyword(s):  
Electron Beam ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Beam Irradiation

scholarly journals E-beam irradiation for the control of Phytophthora nicotianae var. nicotianae in stonewool cubes

Nukleonika ◽  
2015 ◽  
Vol 60 (3) ◽  
pp. 679-682 ◽  
Author(s):  
Magdalena Ptaszek ◽  
Leszek B. Orlikowski ◽  
Wojciech Migdał ◽  
Urszula Gryczka
Keyword(s):  
Electron Beam ◽  
Root Rot ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Potato Dextrose Agar ◽  
Phytophthora Nicotianae ◽  
Beam Irradiation ◽  
Pathogen Population ◽  
Stem Base ◽  
Tomato Seedlings

Abstract Effectiveness of electron beam irradiation was evaluated against Phytophthora nicotianae var. nicotianae, the causal agent of stem base and root rot of tomato. In laboratory trials, irradiation of 7-day-old Phytophthora cultures growing on potato-dextrose-agar (PDA) medium with 1 kGy resulted in the disintegration of the pathogen’s hyphae. Increasing the irradiation dose to 3 kGy caused decay of the hyphae. Irradiation of infested stonewool with 5 kGy caused decrease of the pathogen population about 5 times. Application of 20 kGy completely eliminated the pathogen from stonewool. Irradiation of substratum resulted in significant increase of tomato seedlings healthiness, especially when the dose 20 kGy was applied.

Misting-free diamond surface created by sheet electron beam irradiation

2001 ◽  
Vol 16 (2) ◽  
pp. 553-557 ◽  
Author(s):  
Kazuya Oguri ◽  
Nobuhiro Iwataka ◽  
Akira Tonegawa ◽  
Yoichi Hirose ◽  
Kazuo Takayama ◽  
...  
Keyword(s):  
Electron Beam ◽  
Size Distribution ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Diamond Surface ◽  
Beam Irradiation ◽  
Duration Time ◽  
Clear Vision ◽  
Sheet Electron Beam ◽  
Short Time

We developed a diamond surface that does not mist near the room temperature under a saturated humidity atmosphere, by sheet electron beam irradiation (SEBI) treatment. SEBI treatment decreased the time to clear vision of the diamond surface. Following SEBI treatment for 1.91 s (= 0.72 MGy) to a diamond surface, the time to clear vision was less than 2 s. The effective duration time was a few hours. Based on the results of the size distribution of the drops on the misting-free diamond surface following blowing for 3 s, we proposed an explanation for the short time to clear vision of the diamond surface treated by SEBI.

Color Change of Spodumene Gemstone by Electron Beam Irradiation

2013 ◽  
Vol 770 ◽  
pp. 370-373 ◽  
Author(s):  
Pannipa Noithong ◽  
Panee Pakkong ◽  
Kittisakchai Naemchanthara
Keyword(s):  
Crystal Structure ◽  
Electron Beam ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Color Change ◽  
Crystal Structure Analysis ◽  
Beam Irradiation ◽  
Color Analysis ◽  
Before And After ◽  
Impurity Elements

Study on the electron beam irradiation color change induction of spodumene (LiAlSi2O6) samples, which color exhibit green, pink and colorless. Characteristic the electron-beam irradiation dose were selected 30,000 kGy, 40,000 kGy and 50,000 kGy. The color and fading of spodumene samples were analyzed by UV-VIS spectrophotometer , crystal structure were determined by X-ray diffraction (XRD) spectrometer, free radical species of impurities were determined by Electron Spin Resonance (ESR) spectrometer before and after irradiation. The results revealed the color of spodumene samples changed after irradiation, from green spodumene became a little darker color, pink spodumene became green color, colorless spodumene became pink to purple color the results of the color analysis and fading displayed on the CIE L* a* b* color system, color change spodumene samples were determined by values changed of a* and b*. Color fade of spodumene were determined by values changed of L*. The results of all samples crystal structure analysis were shown on the XRD patterns of the JCPDS No. 89-6662 (Spodumene) with monoclinic structure. The radical analysis results of impurity elements, green and pink only appear the ESR pattern of manganese (Mn2+), and chromium (Cr3+), respectively. It can be conclusion that intensity of color change depend on the irradiation dose and impurity elements in spodumene samples.

scholarly journals Effects of Electron Beam Irradiation on the Mechanical, Thermal, and Surface Properties of Some EPDM/Butyl Rubber Composites

Polymers ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 1206 ◽  
Author(s):  
Maria Stelescu ◽  
Anton Airinei ◽  
Elena Manaila ◽  
Gabriela Craciun ◽  
Nicusor Fifere ◽  
...  
Keyword(s):  
Electron Beam ◽  
Irradiation Dose ◽  
Electron Beam Irradiation ◽  
Contact Angles ◽  
Butyl Rubber ◽  
Attenuated Total Reflection ◽  
Beam Irradiation ◽  
Rubber Composites ◽  
Scanning Calorimetry ◽  
Wide Range

The effects of electron beam irradiation on the properties of ethylene propylene diene monomer (EPDM)/butyl rubber composites in presence of a polyfunctional monomer were investigated by means of differential scanning calorimetry (DSC), thermal analysis, scanning electron microscopy (SEM), attenuated total reflection absorption infrared spectroscopy (ATR-IR), and mechanical and surface energy measurements. The samples were exposed over a wide range of irradiation doses (20–150 kGy). The EPDM matrix was modified with butyl rubber, chlorobutyl rubber, and bromobutyl rubber. The gel content and crosslink density were found to increase with the electron beam irradiation dose. The values of the hardness and modulus increased gradually with the irradiation dose, while the tensile strength and elongation at break decreased with increasing irradiation dose. The EPDM/butyl rubber composites presented a higher thermal stability compared to the initial EPDM sample. The incorporation of butyl rubbers into the EPDM matrix led to an increase in material hydrophobicity. A similar trend was observed when the irradiation dose increased. The greatest change in the surface free energy and the contact angles occurs at an irradiation dose of 20 kGy. The Charlesby–Pinner plots prove the tendency to crosslinking as the irradiation dose increases.

scholarly journals Electron beam-based fabrication of crosslinked hydrophilic carbon electrodes and their application for capacitive deionization

RSC Advances ◽  
2019 ◽  
Vol 9 (17) ◽  
pp. 9684-9691
Author(s):  
Hyo-Sub Kim ◽  
Joon-Yong Sohn ◽  
In-Tae Hwang ◽  
Junhwa Shin ◽  
Chan-Hee Jung ◽  
...  
Keyword(s):  
Electron Beam ◽  
Room Temperature ◽  
Electron Beam Irradiation ◽  
Carbon Electrodes ◽  
Carbon Electrode ◽  
Capacitive Deionization ◽  
Beam Irradiation

A crosslinked hydrophilic carbon electrode with better desalination performance can easily be produced using room-temperature, quick electron-beam irradiation.

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