A new way to prepare PMMA contain lead salt was presented. This work firstly prepares the material by microemulsion polymerization. The ability of anti-radiation, transmittance ratio and glass transition temperature ...A new way to prepare PMMA contain lead salt was presented. This work firstly prepares the material by microemulsion polymerization. The ability of anti-radiation, transmittance ratio and glass transition temperature （Tg） of the material was characterized. The anti-radiation ability is enhanced with the increasing of lead salt content and the thickness of the material. The transmittance ratio decreased with the content of the lead salt. The glass transition temperature of the material is increased with the lead salt content of the organic glass.展开更多
Aiming at the harmfulness of and protection from ionizing radiation, this paper will centre on the design and synthesis technology of a new type of polymeric material which is stable at the ionizing radiation from 10-...Aiming at the harmfulness of and protection from ionizing radiation, this paper will centre on the design and synthesis technology of a new type of polymeric material which is stable at the ionizing radiation from 10-11 to 10-8 meter wave. The material is made up of epoxy resin 6101, curing agent phenolic-aniline resin, which is developed by the authors, and other auxilliary agents. This material is stable at the radiation of 107Gy,and its physical and chemical properties are excellent.展开更多
Crosslinked poly(methyl methacrylate) and polystyrene with barium dimethacrylate [Ba(MA)_2] as crosslinking agent have been synthesized. The relationship between X-ray absorbability and the content of Ba(MA)_2 in poly...Crosslinked poly(methyl methacrylate) and polystyrene with barium dimethacrylate [Ba(MA)_2] as crosslinking agent have been synthesized. The relationship between X-ray absorbability and the content of Ba(MA)_2 in polymers was investigated. TGA and DSC results indicated that the crosslinked polymers containing barium dimethacrylate have a much better heat stability than pure PMMA or PS. The mechanical properties of the polymers containing barium are improved in comparison with the pure PMMA.展开更多
Mice were administered a selenium-rich Agaricus blazei Murill(Se-AbM)polysaccharides and tea polyphenol compound solution for prevention and treatment.Following exposure to 2 Gy of infrared radiation,peripheral blood ...Mice were administered a selenium-rich Agaricus blazei Murill(Se-AbM)polysaccharides and tea polyphenol compound solution for prevention and treatment.Following exposure to 2 Gy of infrared radiation,peripheral blood counts of white blood cells,red blood cells,and platelets were assessed,along with serum levels of apoptosis-related factors Fas and Fas ligand,inflammatory factors interferon-gamma and tumor necrosis factor-alpha,immune-related factors interleukin-3 and interleukin-6,and indicators of oxidative stress,including malondialdehyde,superoxide dismutase,and glutathione.The results showed significant differences in these indicators between the Se-AbM-treated group and the model group,suggesting that Se-AbM may inhibit apoptosis,enhance the clearance of free radicals in the body,improve antioxidant capacity,and provide a significant protective effect against radiation-induced immune damage.展开更多
In this paper,to reduce the damage or absorption caused by radiation to optical fibers,we study lightweight and flexible anti-radiation films based on optical precision deposition technology.At first,anti-radiation co...In this paper,to reduce the damage or absorption caused by radiation to optical fibers,we study lightweight and flexible anti-radiation films based on optical precision deposition technology.At first,anti-radiation composite thin films based on Kapton,ITO,and Cu(or Al)are designed and homemade with different structures.Subsequently,polarization-maintaining(PM)Yb-doped fiber(Yb-fiber)samples protected by these different kinds of anti-radiation films are irradiated with a dose of∼150 kGy.At last,we comparatively investigate(1)the radiation-induced attenuation(RIA)of these PM Yb-fiber samples and(2)the lasing performance(threshold and slope efficiency)and gain performance of a 1064 nm fiber laser and amplifier using these irradiated PM Yb-fibers as the gain medium,respectively.The results show that such a film can reduce the RIA of the irradiated Yb-fiber by up to 2.84 dB/m and increase the output power by up to 75.3%at most.In addition,we also study the optical recovery of the PM Yb-fibers after radiation.展开更多
The synthesis of anti-radiation active organic phosphorus compounds is an important field in search of radioprotectors.In order to develop new protectors of low toxicity and high potency, more than thirty phosphorus c...The synthesis of anti-radiation active organic phosphorus compounds is an important field in search of radioprotectors.In order to develop new protectors of low toxicity and high potency, more than thirty phosphorus compounds such as dialkylphosphorocyanidates(1), tetraalkylmonothiopyrophosphates(2), N-substituted dialkylphosphoramidates(3) and aminoalkylthiophosphates (4)have been designed and synthesized.展开更多
An anti-radiation structure of In P-based high electron mobility transistor(HEMT) has been proposed and optimized with double Si-doped planes. The additional Si-doped plane under channel layer has made a huge promotio...An anti-radiation structure of In P-based high electron mobility transistor(HEMT) has been proposed and optimized with double Si-doped planes. The additional Si-doped plane under channel layer has made a huge promotion in channel current, transconductance, current gain cut-off frequency, and maximum oscillation frequency of In P-based HEMTs. Moreover, direct current(DC) and radio frequency(RF) characteristic properties and their reduction rates have been compared in detail between single Si-doped and double Si-doped structures after 75-keV proton irradiation with dose of 5× 10^(11) cm^(-2),1× 10^(12) cm^(-2), and 5× 10^(12) cm^(-2). DC and RF characteristics for both structures are observed to decrease gradually as irradiation dose rises, which particularly show a drastic drop at dose of 5× 10^(12) cm^(-2). Besides, characteristic degradation degree of the double Si-doped structure is significantly lower than that of the single Si-doped structure, especially at large proton irradiation dose. The enhancement of proton radiation tolerance by the insertion of another Si-doped plane could be accounted for the tremendously increased native carriers, which are bound to weaken substantially the carrier removal effect by irradiation-induced defects.展开更多
We demonstrate the spectroscopic and laser performance before and after 100 Mrad gamma-ray irradiation on an Er,Pr：GYSGG crystal grown by the Czochralski method. The additional absorption of Er,Pr：GYSGG crystal is c...We demonstrate the spectroscopic and laser performance before and after 100 Mrad gamma-ray irradiation on an Er,Pr：GYSGG crystal grown by the Czochralski method. The additional absorption of Er,Pr：GYSGG crystal is close to zero in the 968 nm pumping and 2.7-3 μm laser wavelength regions. The lifetimes of the upper and lower levels show faint decreases after gamma-ray irradiation. The maximum output powers of 542 and 526 mW with the slope efficiencies of 17.7% and 17.0% are obtained, respectively, on the GYSGG/Er,Pr：GYSGG composite crystal before and after the gammaray irradiation. These results suggest that Er,Pr：GYSGG crystal as a laser gain medium possesses a distinguished antiradiation ability for application in space and radiant environments.展开更多
Perovskite solar cells(PSCs)are promising for space applications owing to their high efficiency,superior power-to-mass ratio,and notable radiation tolerance.However,the impact and mechanism of the space radiation(e.g....Perovskite solar cells(PSCs)are promising for space applications owing to their high efficiency,superior power-to-mass ratio,and notable radiation tolerance.However,the impact and mechanism of the space radiation(e.g.,protons and electrons)on their performance remain poorly understood,impeding the advancement of their space capabilities and applications.This review summarizes recent advances in understanding the irradiation stability of PSCs under simulated space conditions.Firstly,the review analyzes the impact of different space radiation particles.Subsequently,we detail the radiation response of perovskite materials,reveal the mechanisms of radiation-induced damage,and summarize strategies for improving stability.Finally,the review concludes with perspectives on future research directions,highlighting the study of coupled environmental effects,long-term reliability assessments,and the development tandem cell configurations.展开更多
Objective：To explore the effect of Renshen Yangrong Decoction（人参养荣汤,RYD） in protecting bone marrow from radiation injury.Methods：One hundred and eighty Kuming mice were subjected to the three tests for anti-r...Objective：To explore the effect of Renshen Yangrong Decoction（人参养荣汤,RYD） in protecting bone marrow from radiation injury.Methods：One hundred and eighty Kuming mice were subjected to the three tests for anti-radiation injury effect evaluation,i.e.the test of peripheral white blood cell（WBC） count, the test of bone marrow nucleated cell count,and the bone marrow micronucleus test,using 60 mice for each test.The mice in each test were divided into 6 groups：the blank control group,the model control group,the positive control group treated by Shiyiwei Shenqi Tablet（十一味参芪片,1.0 g/kg）,and three RYD groups treated with high（42.0 g/kg）,moderate（21.0 g/kg）,and low（10.5 g/kg） doses of crude drugs of RYD,with 10 mice in each group.The treatment was given by gastrogavage perfusion continuously for 7-14 days before mice received ^（60）Co-γray radiation and continued until the end of the experiment.The body weights of the mice were monitored,the changes in peripheral WBC and bone marrow nucleated cells were counted,and the variation in bone marrow micronucleated cells was observed on the respective appointed days.Results：A significant decrease in body weight,peripheral WBC count,and bone marrow nucleated cell count,as well as marked changes in bone marrow micronucleated cells were observed in the mice after radiation,indicating that the radiation injury model was successfully established.As compared with the model control group,the decrease in body weight,peripheral WBC count,and bone marrow nucleated cell count,as well as the increase in bone marrow micronucleus cell count in the high dosage RYD treated group were obviously inhibited or lessened （P0.05 or P0.01）.Conclusion：RYD showed obvious protective effect in mice with bone marrow injury induced by radiation.展开更多
基金the financial support of the National Nature Science Foundation of China （No. 20771046） College Scientific Research Fruit Advance Program of Education Office of Jiangsu Province （No. JHB06-17）.
文摘A new way to prepare PMMA contain lead salt was presented. This work firstly prepares the material by microemulsion polymerization. The ability of anti-radiation, transmittance ratio and glass transition temperature （Tg） of the material was characterized. The anti-radiation ability is enhanced with the increasing of lead salt content and the thickness of the material. The transmittance ratio decreased with the content of the lead salt. The glass transition temperature of the material is increased with the lead salt content of the organic glass.
文摘Aiming at the harmfulness of and protection from ionizing radiation, this paper will centre on the design and synthesis technology of a new type of polymeric material which is stable at the ionizing radiation from 10-11 to 10-8 meter wave. The material is made up of epoxy resin 6101, curing agent phenolic-aniline resin, which is developed by the authors, and other auxilliary agents. This material is stable at the radiation of 107Gy,and its physical and chemical properties are excellent.
文摘Crosslinked poly(methyl methacrylate) and polystyrene with barium dimethacrylate [Ba(MA)_2] as crosslinking agent have been synthesized. The relationship between X-ray absorbability and the content of Ba(MA)_2 in polymers was investigated. TGA and DSC results indicated that the crosslinked polymers containing barium dimethacrylate have a much better heat stability than pure PMMA or PS. The mechanical properties of the polymers containing barium are improved in comparison with the pure PMMA.
文摘Mice were administered a selenium-rich Agaricus blazei Murill(Se-AbM)polysaccharides and tea polyphenol compound solution for prevention and treatment.Following exposure to 2 Gy of infrared radiation,peripheral blood counts of white blood cells,red blood cells,and platelets were assessed,along with serum levels of apoptosis-related factors Fas and Fas ligand,inflammatory factors interferon-gamma and tumor necrosis factor-alpha,immune-related factors interleukin-3 and interleukin-6,and indicators of oxidative stress,including malondialdehyde,superoxide dismutase,and glutathione.The results showed significant differences in these indicators between the Se-AbM-treated group and the model group,suggesting that Se-AbM may inhibit apoptosis,enhance the clearance of free radicals in the body,improve antioxidant capacity,and provide a significant protective effect against radiation-induced immune damage.
基金supported by the National Key Research and Development Program of China(No.2020YFC2200403)the National Natural Science Foundation of China(No.62375231)the Fujian Province Science and Technology Planning Project of China(No.2022H6015).
文摘In this paper,to reduce the damage or absorption caused by radiation to optical fibers,we study lightweight and flexible anti-radiation films based on optical precision deposition technology.At first,anti-radiation composite thin films based on Kapton,ITO,and Cu(or Al)are designed and homemade with different structures.Subsequently,polarization-maintaining(PM)Yb-doped fiber(Yb-fiber)samples protected by these different kinds of anti-radiation films are irradiated with a dose of∼150 kGy.At last,we comparatively investigate(1)the radiation-induced attenuation(RIA)of these PM Yb-fiber samples and(2)the lasing performance(threshold and slope efficiency)and gain performance of a 1064 nm fiber laser and amplifier using these irradiated PM Yb-fibers as the gain medium,respectively.The results show that such a film can reduce the RIA of the irradiated Yb-fiber by up to 2.84 dB/m and increase the output power by up to 75.3%at most.In addition,we also study the optical recovery of the PM Yb-fibers after radiation.
文摘The synthesis of anti-radiation active organic phosphorus compounds is an important field in search of radioprotectors.In order to develop new protectors of low toxicity and high potency, more than thirty phosphorus compounds such as dialkylphosphorocyanidates(1), tetraalkylmonothiopyrophosphates(2), N-substituted dialkylphosphoramidates(3) and aminoalkylthiophosphates (4)have been designed and synthesized.
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11775191,61404115,61434006,and 11475256)the Promotion Funding for Excellent Young Backbone Teacher of Henan Province,China(Grant No.2019GGJS017)。
文摘An anti-radiation structure of In P-based high electron mobility transistor(HEMT) has been proposed and optimized with double Si-doped planes. The additional Si-doped plane under channel layer has made a huge promotion in channel current, transconductance, current gain cut-off frequency, and maximum oscillation frequency of In P-based HEMTs. Moreover, direct current(DC) and radio frequency(RF) characteristic properties and their reduction rates have been compared in detail between single Si-doped and double Si-doped structures after 75-keV proton irradiation with dose of 5× 10^(11) cm^(-2),1× 10^(12) cm^(-2), and 5× 10^(12) cm^(-2). DC and RF characteristics for both structures are observed to decrease gradually as irradiation dose rises, which particularly show a drastic drop at dose of 5× 10^(12) cm^(-2). Besides, characteristic degradation degree of the double Si-doped structure is significantly lower than that of the single Si-doped structure, especially at large proton irradiation dose. The enhancement of proton radiation tolerance by the insertion of another Si-doped plane could be accounted for the tremendously increased native carriers, which are bound to weaken substantially the carrier removal effect by irradiation-induced defects.
基金Project supported by the National Key Research and Development Program of China(Grant No.2016YFB1102301)the National Natural Science Foundation of China(Grant Nos.51272254,61405206,and 51502292)the Open Research Fund of the State Key Laboratory of Pulsed Power Laser Technology,Electronic Engineering Institute,China(Grant No.SKL2015KF01)
文摘We demonstrate the spectroscopic and laser performance before and after 100 Mrad gamma-ray irradiation on an Er,Pr：GYSGG crystal grown by the Czochralski method. The additional absorption of Er,Pr：GYSGG crystal is close to zero in the 968 nm pumping and 2.7-3 μm laser wavelength regions. The lifetimes of the upper and lower levels show faint decreases after gamma-ray irradiation. The maximum output powers of 542 and 526 mW with the slope efficiencies of 17.7% and 17.0% are obtained, respectively, on the GYSGG/Er,Pr：GYSGG composite crystal before and after the gammaray irradiation. These results suggest that Er,Pr：GYSGG crystal as a laser gain medium possesses a distinguished antiradiation ability for application in space and radiant environments.
基金support from the National Natural Science Foundation of China(52303383)the China Postdoctoral Science Foundation(2024M762713).
文摘Perovskite solar cells(PSCs)are promising for space applications owing to their high efficiency,superior power-to-mass ratio,and notable radiation tolerance.However,the impact and mechanism of the space radiation(e.g.,protons and electrons)on their performance remain poorly understood,impeding the advancement of their space capabilities and applications.This review summarizes recent advances in understanding the irradiation stability of PSCs under simulated space conditions.Firstly,the review analyzes the impact of different space radiation particles.Subsequently,we detail the radiation response of perovskite materials,reveal the mechanisms of radiation-induced damage,and summarize strategies for improving stability.Finally,the review concludes with perspectives on future research directions,highlighting the study of coupled environmental effects,long-term reliability assessments,and the development tandem cell configurations.
基金Supported by the Scientific and Technologic Items of Traditional Chinese Medicine Administration of Beijing City(No.2004 JingZhongZhongⅣ15)
文摘Objective：To explore the effect of Renshen Yangrong Decoction（人参养荣汤,RYD） in protecting bone marrow from radiation injury.Methods：One hundred and eighty Kuming mice were subjected to the three tests for anti-radiation injury effect evaluation,i.e.the test of peripheral white blood cell（WBC） count, the test of bone marrow nucleated cell count,and the bone marrow micronucleus test,using 60 mice for each test.The mice in each test were divided into 6 groups：the blank control group,the model control group,the positive control group treated by Shiyiwei Shenqi Tablet（十一味参芪片,1.0 g/kg）,and three RYD groups treated with high（42.0 g/kg）,moderate（21.0 g/kg）,and low（10.5 g/kg） doses of crude drugs of RYD,with 10 mice in each group.The treatment was given by gastrogavage perfusion continuously for 7-14 days before mice received ^（60）Co-γray radiation and continued until the end of the experiment.The body weights of the mice were monitored,the changes in peripheral WBC and bone marrow nucleated cells were counted,and the variation in bone marrow micronucleated cells was observed on the respective appointed days.Results：A significant decrease in body weight,peripheral WBC count,and bone marrow nucleated cell count,as well as marked changes in bone marrow micronucleated cells were observed in the mice after radiation,indicating that the radiation injury model was successfully established.As compared with the model control group,the decrease in body weight,peripheral WBC count,and bone marrow nucleated cell count,as well as the increase in bone marrow micronucleus cell count in the high dosage RYD treated group were obviously inhibited or lessened （P0.05 or P0.01）.Conclusion：RYD showed obvious protective effect in mice with bone marrow injury induced by radiation.
