最新刊期
卷 43 ， 期 2 ， 2025
- “最新研究报道，系统总结了药用植物对UV-B辐射的应答策略，探讨了UV-B在刺激药用植物次生代谢产物合成及增强植物逆境胁迫抗性中的应用，为提升药用植物品质提供理论支撑。”摘要：The accumulation of secondary metabolites is essential for determining the quality of traditional Chinese medicinal materials. However, as medicinal plants transition from wild growth to artificial cultivation, issues such as reduced active components and inconsistent quality have emerged. Ultraviolet radiation B（UV-B） radiation can stimulate the production of endogenous protective substances in plants, thereby influencing the synthesis of secondary metabolites. Understanding the effects of UV-B on secondary metabolite accumulation of secondary metabolites in medicinal plants, along with the associated mechanisms, has become a significant research focus. This review systematically summarized the response strategies of medicinal plants to UV-B radiation, highliting its effects on the growth, development, physiology, biochemistry, secondary metabolite accumulation, and stress tolerance induction. Furthermore, the potential applications of UV-B radiation in enhancing secondary metabolite synthesis and improving plant stress resistance are explored. Current research challenges and limitations are also discussed, offering insights for future advancements in this field. This review aims to provide a theoretical foundation for the practical application of UV-B irradiation technology in boosting secondary metabolite content and stress tolerance in medicinal plants.关键词：Ultraviolet radiation B（UV-B）;Medicinal plant;Stress response;Secondary metabolite;Multi-omics65|23|0更新时间：2025-05-06
- “环氧树脂辐射损伤研究进展，分析了辐照条件下环氧树脂性能变化，为可靠性评估提供参考。”摘要：Epoxy resins are extensively utilized in the nuclear industry, high-energy accelerators, and deep-space exploration due to their strong corrosion resistance, good thermal stability, high mechanical strength, and exceptional electrical insulation properties. However, ionizing radiation present in these application environments can degrade the three-dimensional network structures of epoxy resins, significantly impacting their service performance. This presents a significant challenge for reliability assessment, making it necessary to elucidate their irradiation damage behavior. This paper reviews the recent research advancements on the radiation damage behavior of epoxy resins, emphasizing the effects of chain crosslinking and scission induced by various irradiation conditions on their chemical structures and physical properties, including mechanical properties, thermal stability, thermal conductivity, and electrical properties. Finally, future research directions deserving special attention are discussed, considering the current gaps in understanding the radiation damage in epoxy resins.关键词：Epoxy resin;Radiation damage;Radiation crosslinking;Radiation degradation;Performance aging37|32|0更新时间：2025-05-06
REVIEW
- “本报道聚焦于新型抗菌涂层材料的开发，研究团队将有机硅季铵盐与含氟丙烯酸酯单体结合，制备出具有优异抗菌性能和机械强度的UV光固化配方，为抗菌涂层材料领域带来新突破。”摘要：To develop an efficient antibacterial coating material, the basic formulas for epoxy acrylate 6215-100 and triepropanediol diacrylate are derived using silicone quaternary ammonium salt (QAC) as an antibacterial agent and fluorine-containing acrylate as a hydrophobic monomer. Different ultraviolet (UV)-photocuring formulations are established based on different proportions of antibacterial agents and hydrophobic monomers. The surface morphology, double-bond transformation, thermal stability, mechanical properties, and antibacterial properties of coatings containing different proportions of additives are investigated. The results showed that the higher the QAC content in the coating, the better was the antibacterial effect. Moreover, the antibacterial-zone diameter of the coating reached 4.05 mm when 25% 1UV-F:9QAC was added. The double-bond conversion rate of all samples exceeded 80%. The mechanical properties deteriorated with the increase in the additives. The maximum water contact angle of the 1UV-F:9QAC coating was 91.1°. The 3UV-F:7QAC additive demonstrated the best comprehensive performance when the additive amount was 15%; it exhibited a bacteriostatic range of 1.3 mm against Staphylococcus aureus, a maximum tensile strength of 3.06 MPa, and an elongation at break of 44.0%. The coating exhibited a double-bond conversion rate exceeding 90%, and its thermal stability did not degrade significantly.关键词：UV-curing;Antibacterial coating;Quaternary ammonium salt;Fluorine-containing78|69|0更新时间：2025-05-06
- “在铅铋冷却剂中，研究人员开发了一种新型气溶胶固定剂，能有效捕获钋放射性气溶胶，为核安全提供技术支撑。”摘要：Radioactive aerosols (polonium and polonium compounds) generated during the normal operation of lead-bismuth coolants are extremely toxic and radioactive, thus rendering them detrimental to the operation staff and environment. Thus, radioactive polonium aerosols generated during polonium removal must be captured and immobilized. In this study, an aerosol fixative with desirable wettability and capture fixation properties was prepared using compounding xanthan gum (XG) with a grafted polymer polyacrylamide grafted acrylic acid, 2-hydroxyethyl acrylate (PAM-g-PAA/PHEA), and a polyacrylamide-based material was used for the substrate. The structure of the aerosol fixative was analyzed and confirmed via infrared spectroscopy, X-ray diffraction, and scanning electron microscopy. The thermal properties, wettability, as well as capture and fixation effects of tellurium (simulated polonium) aerosols were investigated via thermogravimetric analysis, contact-angle measurements, and fixed-sedimentation experiments. The results showed that PAM-g-PAA/PHEA and XG synergistically formed a dual-network structure through hydrogen bonding and that the thermal, wettability, and immobilization properties of the aerosol fixative improved. The optimal addition amount of XG was determined to be 0.05% based on the results of sedimentation experiments, wettability, and fixation rate. At this optimal amount, the aerosol fixing agent exerts the greatest effect on the hydrogen bond and van der Waals forces of tellurium powder. The lowest contact angle is 38.38°, and the tellurium powder infiltrated completely within 80 s. Based on the mass-concentration change, the sedimentation fixation rate is 99.24%, which indicates that atomization fixation is suitable for capturing and fixing radioactive aerosols. The small droplets atomized by the aerosol fixing agent in this study rapidly deposited aerosols, followed by continuous capture and fixation. The results of batch fixed sedimentation verify that this type of aerosol fixing agent is suitable for the capture and fixation of tellurium aerosols, thus providing technical support for the capture and fixation of radioactive polonium aerosols.关键词：Xanthan gum;Dual network;Capture fixed;Wettability;Fixed rate61|81|0更新时间：2025-05-06
RADIATION CHEMISTRY
- “在肿瘤放射治疗领域，研究者通过分析六维床摆位对不同肿瘤位置的影响，发现其能显著提升摆位精度，但旋转误差控制仍有限。”摘要：Cone-beam computed tomography (CBCT) images of tumor patients were retrospectively analyzed based on a six-degree-of-freedom (6-DOF) couch for accelerators, whereby patient setup error data were compared, and intra-fractional setup errors during radiotherapy were investigated for tumor patients. This study aimed to evaluate the differences in setup performance for tumors in various anatomical locations. A total of 85 tumor patients who underwent radiotherapy at the radiotherapy center between March 2020 and September 2023 were selected and categorized into four groups: brain tumors, lung cancer, rectal cancer, and breast cancer. The initial and intra-fractional setup errors for the four groups were statistically analyzed across six degrees of freedom: left-right (X), head-foot (Y), anterior-posterior (Z), and rotations (Rx, Ry, Rz). A two-sample heteroscedastic t-test was used to compare the intra-fractional setup errors in different directions among the tumor types. After corrections using the 6-DOF couch, the translational error ranges for both initial and intra-fractional setup errors were generally consistent, primarily within ±1 cm. In intra-fractional setup errors, the Rx direction exhibited a slightly reduced error range. However, the rotational errors in the Ry and Rz directions were significantly larger in breast cancer cases. Regarding intra-fractional translational errors across different tumor groups, patients with brain tumor exhibited the smallest errors along translational directions. Patients with lung cancer also showed relatively small translational errors but exhibited a skew in the Z direction (anterior-posterior). Patients with rectal cancer exhibited relatively large translational errors, particularly in the Z direction. Additionally, both the initial and intra-fractional setups demonstrated that brain tumor errors were the smallest, followed by lung cancer, whereas breast and rectal cancer errors were relatively larger. There were no significant differences in the Rx direction among different tumor types (p>0.01). However, significant differences were observed between breast and brain tumor patients (p=0) and between breast and lung cancer patients (p=0). A weakly significant difference was also noted between patients with breast and rectal cancer (p=0.034). In the Rz direction, patients with rectal cancer exhibited significant differences compared to those with brain tumor (p=0.003) and lung cancer (p=0.002). A weakly significant difference was also found between rectal and breast cancer patients (p=0.033), indicating that rectal cancer cases had notably different setup errors in the Rz rotational direction compared to the other tumor types. The application of a 6-DOF couch significantly improved the translational setup precision and rotational errors. However, limitations remain in controlling rotational errors, particularly for tumor types with strong site specificity or complex surrounding organ structures, such as breast and rectal cancers. Further optimization of immobilization devices and enhanced respiratory management tailored to individual patient characteristics are recommended to improve the precision and effectiveness of radiotherapy.关键词：Positioning error;Six-dimensional couch;Radiotherapy34|32|0更新时间：2025-05-06
RADIOBIOLOGY AND RADIOMEDICINE
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Growth-stimulating effect of 60Co-γ ray irradiation on
Idesia polycarpa seeds in M1 generation 封面论文 AI导读“贵州六盘水市野生山桐子种子经60Co-γ射线辐照处理后，成苗率提高，幼苗生长及根系发育显著促进，为山桐子新种质创制提供理论基础。”摘要：The seeds of wild Idesia polycarpa obtained from Liupanshui City, Guizhou Province were used as experimental materials in this study, where the seeds were treated with different irradiation doses of 60Co-γ ray. The effect of 60Co-γ ray irradiation on the seedling rate, ground diameter, seedling height, leaf length, leaf width, leaf area, leaf circumference, secondary root length, secondary root diameter, and chlorophyll content of 1-year-old I. polycarpa were investigated. The results showed that compared with the control, 60Co-γ irradiation treatment significantly increased the seedling rate of I. polycarpa and had significant effects on the growth of I. polycarpa seedlings (p<0.05). Under an irradiation dose of 120 Gy, the ground diameter and seedling height of the I. polycarpa seedlings were the largest, i.e., 36% and 68% higher than those of the control, respectively. With the increase in irradiation dose, the length of secondary roots, the thickness of secondary roots, and the number of tertiary roots increased significantly, reaching maximum values at 120 Gy. The chlorophyll content of I. polycarpa leaves first increased, then decreased, and then increased again. Mutant plants with high growth, stem bending, deformity, multi-branching, and dwarfing were produced via 60Co-γ ray irradiation. The irradiation dose of 60Co-γ ray was significantly correlated with most of the growth traits (p<0.05). The results above show that 60Co-γ ray irradiation can improve the seedling emergence rate of I. polycarpa, promote the growth and root development of I. polycarpa, and yield a few different types of mutant plants, thus providing an important theoretical basis for the creation of new germplasms of I. polycarpa.关键词：Idesia polycarpa;60Co-γ ray;Emergence rate;Seedling growth;Chlorophyll41|56|0更新时间：2025-05-06 - “在油茶加工副产物高值化利用领域，专家采用电子束辐照协同水热处理制备油茶壳低聚木糖，优化活性炭脱色工艺，测定并分析脱色后油茶壳低聚木糖的抗氧化活性，为油茶加工副产物高值化利用提供新途径。”摘要：Xylo-oligosaccharides were prepared from Camellia oleifera shell via hydrothermal treatment after electron beam irradiation. The antioxidant activity of xylo-oligosaccharide of Camellia oleifera shell after decolorization was determined and analyzed through optimizing the decolorization process of activated carbon. This provides a new approach for the high-value utilization of by-products from Camellia oleifera processing. The results showed that the concentration of xylo-oligosaccharides prepared via 3 MeV electron beam irradiation combined with hydrothermal treatment was 13.87 mg/mL, and the concentrations of xylobiose to xylotetrose after enzymolysis were 3.37 mg/mL, 4.76 mg/mL, and 2.48 mg/mL, respectively. The optimization process of activated carbon decolorization as follows: the decolorization efficiency of Darco G60-activated carbon for xylo-oligosaccharides enzymolysis solution of the Camellia oleifera shell reached 93.77% at a decolorization temperature of 30 ℃, a decolorization time of 60 min, an activated carbon addition of 50 mg/mL, and a pH of 4. The retention rates of xylobiose to xylotetrose and total xylo-oligosaccharides were 97.66% and 71.50%, respectively. It was found that the xylo-oligosaccharides of the Camellia oleifera shell were amorphous and cross-linked with several parts, as shown by scanning electron microscopy and Fourier transform infrared spectroscopy, with the main chain formed by D-xylose via β-1,4-glucoside linkage. In addition, when the concentration of xylo-oligosaccharides in Camellia oleifera shell was 10 mg/mL, the antioxidant activity was better. The scavenging rates of 1,1-Diphenyl-2-picrylhydrazyl(DPPH) radical, 2,2'-Azinobis(3-ethylbenzothiazoline-6-sulfonic acid)(ABTS) radical, superoxide anion and hydroxyl radical were 62.07%, 68.50%, 70.26% and 75.52%, respectively.关键词：Irradiation-hydrothermal treatment;Xylo-oligosaccharides;Activated carbon;Structural analysis;Antioxidant56|67|0更新时间：2025-05-06
- “在石化废水净化领域，研究人员采用介质阻挡放电协同催化技术，以K2Fe4O7固体催化剂处理腈纶废水，优化实验参数后，COD降解率和浊度去除率分别达到77.43%和91.14%，为废水净化提供新思路。”摘要：The co-catalytic treatment of acrylic fiber wastewater using low-temperature plasma generated by a dielectric barrier discharge was studied. The solid catalyst K2Fe4O7 was synthesized by hydrothermal synthesis and characterized by X-ray diffraction and scanning electron microscopy. Wastewater samples from Sinopec Anqing Branch were used as experimental water samples, and chemical oxygen demand (COD) and turbidity were used as indices. The activity of the catalyst was first verified. Thereafter, based on a single factor experiment, a response surface method was used to optimize the test based on discharge voltage, amount of catalyst addition, and pH. The optimal response parameters were obtained as a discharge voltage of 40 kV, catalyst addition amount of 0.05 g, and pH of 2. The predicted COD degradation and turbidity removal rates of the optimal acrylic fiber wastewater were 77.43% and 91.14%, respectively. To verify the accuracy of the model, three sets of experiments were conducted under the predicted optimal experimental conditions to determine the COD degradation rate of acrylic fiber wastewater as 77.34% and turbidity removal rate as 91.11%. The accuracy of the model used in this study is relatively high. This study provides a novel approach for the purification of petrochemical wastewater.关键词：Plasma;Acrylic fiber wastewater;Chemical oxygen demand;Degradation rate60|123|0更新时间：2025-05-06
RADIATION TECHNOLOGY APPLICATION
- “最新研究利用斑马鱼建立剂量学模型，为核设施放射性核素排放问题提供技术手段和数据支持。”摘要：To establish a dosimetric model for zebrafish (Danio rerio) to obtain the dose coefficient and dose rate of zebrafish for 137Cs, and to provide effective technical means and data for radionuclide discharge from nuclear facilities into the environment. The zebrafish concentration factor (CR) was obtained by feeding zebrafish with a 1 000 Bq/L 137Cs aqueous solution in the laboratory. Holistic and simplified anatomical models were established for zebrafish, and the internal and external irradiation deposition energies of radionuclide 137Cs particles in zebrafish were obtained by Monte Carlo simulations. The dose coefficient and dose rate of 137Cs for zebrafish were calculated according to the formula. For the holistic zebrafish model, the 137Cs dose coefficient was 6.77×10-3 (μGy·h-1)/(Bq·kg-1) and calculated dose coefficient of external irradiation was 3.67×10-2 (μGy·h-1)/(Bq·kg-1). In the simplified anatomical model, the 137Cs dose coefficient and calculated dose coefficient of external irradiation were 1.24×10-3 (μGy·h-1)/(Bq·kg-1) and 2.66×10-2 (μGy·h-1)/(Bq·kg-1), respectively. The activity concentrations of 137Cs reached 170 Bq/L and 330 Bq/L when using the zebrafish holistic and simplified anatomical models, respectively. The calculated dose rate of zebrafish exceeded the ERICA screening benchmark (10 μGy/h). In this study, holistic and simplified anatomical models were established for zebrafish based on Monte Carlo simulations, and the results were compared using the ERICA software tool. The calculated results were of the same order of magnitude, thereby demonstrating that the established zebrafish dosimetry model can be applied to environmental radiation impact assessments.关键词：Zebrafish;Overall model;Simplified anatomical model;Dose coefficient;Dose rate84|221|0更新时间：2025-05-06
RADIATION DOSIMETRY
- “据最新报道，中国核电厂液态流出物氚减排技术取得突破，采用水精馏-联合电解催化交换级联工艺，显著提高氚减排效率，为核电厂氚减排提供有效技术路线。”摘要：As nuclear power's role in China's energy structure continues to grow, the reduction of tritium in the liquid effluents of nuclear power plants has become a critical issue that must be addressed in the development of nuclear power. This study analyzes existing tritiated water treatment technologies and proposes a tritium reduction process using a water distillation (WD)-coupled electrolysis catalytic exchange (CECE) cascade, tailored to the characteristics of low tritium concentration and large effluent volumes in nuclear power plant liquid waste, as well as the high reduction factor and the stringent safety and economic requirements. Based on the tritium reduction needs of domestic major reactor types, a preliminary scheme design and energy consumption evaluation were conducted. The results showed that with this design, the tritium decontamination factor in the liquid effluents of nuclear power plants can reach 20.4, and the tritium molar reduction factor can reach 4 857, significantly improving tritium reduction efficiency. This process provides an effective technical solution for tritium reduction in nuclear power plant liquid effluents and offers valuable insights for the design of tritium reduction systems.关键词：Tritium reduction;Nuclear power plant;Titiated water;Water distillation (WD);Combined electrolysis catalytic exchange (CECE)49|65|0更新时间：2025-05-06
- “东海浙南段水流域放射性水平研究显示，氚活度季节性变化显著，核素行为受洋流、气温等环境因素影响。”摘要：The study aimes to comprehensively assess the radioactive levels in the East China Sea, Zhejiang South section in 2023, to provide reliable baseline data for the environmental monitoring and evaluation of the upcoming San'ao Nuclear Power Station. Quarterly collection and analysis of seawater, marine organisms, and seabed sediment samples from the target maritime area were performed to evaluate temporal and spatial variations in radioactive nuclides. The results revealed that the tritium activity in the seawater of the Zhejiang South section exhibited significant seasonal changes across four quarters, with activities of 0.33 Bq/L, 0.38 Bq/L, 0.39 Bq/L, and 0.26 Bq/L, respectively. The activity of alpha nuclides also exhibited seasonal fluctuations, with an annual average activity of 0.03 Bq/L. The tritium activity in the biological samples was low. The activity range of gamma nuclides in seabed sediment was as follows: 238U (1.61‒9.32 Bq/kg), 232Th (1.53‒7.29 Bq/kg), 226Ra (1.08‒8.48 Bq/kg), 40K (2.73‒8.72 Bq/kg), and 137Cs (1.02‒9.29 Bq/kg). Seasonal changes in ocean currents significantly affected the migration and accumulation of radioactive nuclides. The spatiotemporal variations in radioactive substances indicate that the behavior of nuclides in the ocean is controlled by complex environmental factors, such as ocean currents, temperature, and precipitation.关键词：East china sea;Radionuclides;Tritium;α radionuclides;γ radionuclides39|29|0更新时间：2025-05-06
RADIATION PROTECTION
- “最新研究揭示了HPGe、CZT、LaBr3（Ce）、CeBr3和NaI（Tl）γ能谱探测器在不同核素探测中的性能差异，为选择合适探测器提供重要参考。”摘要：To understand the nuclear spectroscopic performance of gamma-ray spectrum detectors in different application scenarios, HPGe, CZT, LaBr3(Ce), CeBr3, and NaI(Tl), which are common gamma-ray spectrum detectors, were selected. 241Am, 137Cs, and 60Co standard sources were measured, and the detection limits of the different detectors for different nuclides were calculated. The results show that under environmental background conditions, the detection limits of the HPGe, CZT, LaBr3(Ce), CeBr3, and NaI(Tl) gamma spectrum detectors for low-energy gamma-ray 241Am are 0.039 Bq, 0.180 Bq, 0.781 Bq, 0.697 Bq, and 1.104 Bq, respectively. However, when measuring the activity of 137Cs in the lead chamber, the detection limits are 0.005 Bq, 0.294 Bq, 0.036 Bq, 0.037 Bq, and 0.057 Bq, respectively. The measurement and calculation results show the full-energy peak shape, source peak detection efficiency, background energy spectrum, and the detection limits of the different detectors in different application scenarios, thus providing reference nuclear spectroscopic performance parameters for selecting the appropriate gamma spectrum detectors to measure sample activity.关键词：Full energy peak shape;Source peak detection efficiency;Background energy spectrum;Detection limit;Gamma spectrum detector164|419|0更新时间：2025-05-06
RADIATION INTERDISCIPLINARY RESEARCH
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