[Objective] The aim was to provide reference for research on radiation and breeding of cotton pollen through irradiating common ripe pollen grain of upland cotton by 60Co-γ Ray of varied doses. [Method] Ripe pollen g...[Objective] The aim was to provide reference for research on radiation and breeding of cotton pollen through irradiating common ripe pollen grain of upland cotton by 60Co-γ Ray of varied doses. [Method] Ripe pollen grains of upland cotton were irradiated by 60Co-γ Ray with doses of 5, 10, 15, and 20 Gy, respectively, to learn radiation effect and select appropriate dose. [Result] Most properties of M1 obviously showed variation when dose was over 10 Gy; vitality, growth, and fertility were greatly inhibited when dose was 15 Gy which was almost semi-lethal concentration, and variation species were richest at the same time, which provided materi- als for practical breeding. [Conclusion] 60Co-γ Ray of 15 Gy is more suitable for mutagenesis research on ripe pollen grains of upland cotton.展开更多
The objective of this work is to analyze the transient effects of ^60Co gamma rays in the CMOS image sensor (CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electr...The objective of this work is to analyze the transient effects of ^60Co gamma rays in the CMOS image sensor (CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electrons when gamma rays traversed a silicon or silicon dioxide cube were calculated. A simplified model of a 500 × 500 CIS array was established, and the transient effects of gamma rays in the CIS were simulated. The raw images were captured when the CIS was irradiated by gamma rays. The experimental results were compared with the simulation results. The characteristics of the typical events induced by transient effects were analyzed.展开更多
The effects of 60Co γ ray irradiation on the contents of rare earth and mineral elements and their relativities in the fruitbodies of Agaricus biazei Murvill and their relativities were studied. The results show that...The effects of 60Co γ ray irradiation on the contents of rare earth and mineral elements and their relativities in the fruitbodies of Agaricus biazei Murvill and their relativities were studied. The results show that there are significant difference at the 0.01 level in the contents of rare earth and mineral elements in the fruitbodies among different treatments, and that the variational laws of different elements contents are different with the varieties of the dosages accordingly. Thereinto, the contents of Pr and Mo increase with the increase of the dosage, but they decrease when the dosage are in a certain degree(1.5 KGy). But the Yb content decreases with the increase of the dosage. The variational laws of the contents of K and Cu were similar along with the variety of the dosage, and they all decrease with the increase of the dosage. But the contents of them increase and are higher than that of the three anterior treatments(0, 0.5, 1.0 KGy) when the dosage are 1.5 KGy. It can be seen that the contents of rare earth and mineral elements in the fruitbodies have something to do with the dosages in different degrees, and that rare earth also has something to do with mineral elements in different degrees. Thereinto there lied good linear relationship between the content of Yb and the dosage.展开更多
[Objective] This study aimed to investigate the appropriate dose of 60^Co-γ irradiation for tubers of purple sweet potato.[Methods] The tubers of two purple sweet potato varieties Xuzi L-7 and Yuenanzi were used as e...[Objective] This study aimed to investigate the appropriate dose of 60^Co-γ irradiation for tubers of purple sweet potato.[Methods] The tubers of two purple sweet potato varieties Xuzi L-7 and Yuenanzi were used as experimental materials,and treated with 60^Co-γ irradiation at different doses（0,25,50,75,100,125 and 150 Gy） to determine the emergence rate,number of emerged seedlings per tuber and fresh weight per seedling.[Results] After the 60^Co-γ irradiation at different doses,the emergence period of tubers was postponed while the emergence rate,number of emerged seedlings per tuber and fresh weight per plant were decreased,and the differences between different varieties and different irradiation doses reached significance level.Compared with the control,the emergence period of tubers at irradiation doses above 25 Gy were postponed by 2,3,5,6 and 12 d,respectively.[Conclusion] The half lethal dose（LD50） of Xuzi L-7 was 66.73 Gy,and that of Yuenanzi was 74.96 Gy.展开更多
基金Supported by National Natural Science Foundation of China (10475041)~~
文摘[Objective] The aim was to provide reference for research on radiation and breeding of cotton pollen through irradiating common ripe pollen grain of upland cotton by 60Co-γ Ray of varied doses. [Method] Ripe pollen grains of upland cotton were irradiated by 60Co-γ Ray with doses of 5, 10, 15, and 20 Gy, respectively, to learn radiation effect and select appropriate dose. [Result] Most properties of M1 obviously showed variation when dose was over 10 Gy; vitality, growth, and fertility were greatly inhibited when dose was 15 Gy which was almost semi-lethal concentration, and variation species were richest at the same time, which provided materi- als for practical breeding. [Conclusion] 60Co-γ Ray of 15 Gy is more suitable for mutagenesis research on ripe pollen grains of upland cotton.
基金supported by the National Natural Science Foundation of China(Nos.11805155,11875223,and 11690043)the Chinese Academy of Sciences strategic pilot science and technology project(No.XDA15015000)+1 种基金the Innovation Foundation of Radiation Application(No.KFZC2018040201)the Foundation of State Key Laboratory of China(Nos.SKLIPR1803 and 1610)
文摘The objective of this work is to analyze the transient effects of ^60Co gamma rays in the CMOS image sensor (CIS) using the Monte Carlo method, based on Geant4. The track, energy spectrum, and angle of produced electrons when gamma rays traversed a silicon or silicon dioxide cube were calculated. A simplified model of a 500 × 500 CIS array was established, and the transient effects of gamma rays in the CIS were simulated. The raw images were captured when the CIS was irradiated by gamma rays. The experimental results were compared with the simulation results. The characteristics of the typical events induced by transient effects were analyzed.
文摘The effects of 60Co γ ray irradiation on the contents of rare earth and mineral elements and their relativities in the fruitbodies of Agaricus biazei Murvill and their relativities were studied. The results show that there are significant difference at the 0.01 level in the contents of rare earth and mineral elements in the fruitbodies among different treatments, and that the variational laws of different elements contents are different with the varieties of the dosages accordingly. Thereinto, the contents of Pr and Mo increase with the increase of the dosage, but they decrease when the dosage are in a certain degree(1.5 KGy). But the Yb content decreases with the increase of the dosage. The variational laws of the contents of K and Cu were similar along with the variety of the dosage, and they all decrease with the increase of the dosage. But the contents of them increase and are higher than that of the three anterior treatments(0, 0.5, 1.0 KGy) when the dosage are 1.5 KGy. It can be seen that the contents of rare earth and mineral elements in the fruitbodies have something to do with the dosages in different degrees, and that rare earth also has something to do with mineral elements in different degrees. Thereinto there lied good linear relationship between the content of Yb and the dosage.
基金Supported by "12th Five-Year Plan" Breeding Project of Crops and Live stock of Sichuan Province~~
文摘[Objective] This study aimed to investigate the appropriate dose of 60^Co-γ irradiation for tubers of purple sweet potato.[Methods] The tubers of two purple sweet potato varieties Xuzi L-7 and Yuenanzi were used as experimental materials,and treated with 60^Co-γ irradiation at different doses（0,25,50,75,100,125 and 150 Gy） to determine the emergence rate,number of emerged seedlings per tuber and fresh weight per seedling.[Results] After the 60^Co-γ irradiation at different doses,the emergence period of tubers was postponed while the emergence rate,number of emerged seedlings per tuber and fresh weight per plant were decreased,and the differences between different varieties and different irradiation doses reached significance level.Compared with the control,the emergence period of tubers at irradiation doses above 25 Gy were postponed by 2,3,5,6 and 12 d,respectively.[Conclusion] The half lethal dose（LD50） of Xuzi L-7 was 66.73 Gy,and that of Yuenanzi was 74.96 Gy.
