Radiation and Environmental Biophysics最新文献

{"title":"Dosimetric impact of CT-RED calibration curve variations from different kVp settings on breast cancer treatment planning.","authors":"Oussama Nhila, Mohammed Talbi, M'hamed El Mansouri, Morad Erraoudi, El Mahjoub Chakir","doi":"10.1007/s00411-025-01140-4","DOIUrl":"10.1007/s00411-025-01140-4","url":null,"abstract":"<p><p>The choice of a CT-RED calibration curve directly influences the accuracy of dose calculation in treatment planning systems (TPS), depending on treatment technique, anatomical site and calculation algorithm. This study aimed to evaluate the impact of variations in CT-RED calibration curves due to different tube voltages (kVp) on breast cancer treatment plans as a function of calculation algorithm. CT-RED calibration curves were generated using a CIRS M062 phantom scanned with a 16-slice HITACHI Supria CT scanner at 80, 100, 120, and 140 kVp. These curves were applied to treatment plans for left breast cancer using the Collapsed Cone (CC) and X-ray Voxel-based Monte Carlo (XVMC++) algorithms in MONACO TPS (v6.6.2). Dose-volume histograms and dose statistics were analyzed to assess dose metrics for planned target volumes (PTV) and organs at risk (OAR). Monte Carlo-based dose calculations showed significant sensitivity to kVp settings, while CC results exhibited clinically negligible effects, underscoring that the impact of kVp on dose calculation depends on the algorithm used. Thus, to ensure accurate dose calculations, it is important to adjust calibration curves for each kVp setting when using Monte Carlo algorithms. Furthermore, it is recommended to include this adjustment into the CC algorithm, despite the minimal differences observed, in order to ensure consistency with the ALARA (As Low As Reasonably Achievable) principle.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"437-446"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144754134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Intelligent assistant in radiation protection based on large language model with knowledge base.","authors":"Ankang Hu, Kaiwen Li, Zhen Wu, Hui Zhang, Rui Qiu, Junli Li","doi":"10.1007/s00411-025-01124-4","DOIUrl":"10.1007/s00411-025-01124-4","url":null,"abstract":"<p><p>Radiation protection is a critical pillar supporting the use of nuclear energy and nuclear technologies. The radiation protection system has been established with the accumulation of knowledge and experience. However, it is challenging for an individual or even a committee to master related knowledge and experience comprehensively and meticulously. An intelligent assistant that possesses extensive knowledge and experience in radiation protection is eagerly required. In this work, we propose an intelligent assistant in radiation protection based on a Large Language Model (LLM) with a knowledge base. The assistant can provide reliable answers with references from authoritative publications. The assistant was developed using open-source toolkits and open-source LLMs, and demonstrated satisfying answers to professional queries. Users can obtain reliable answers with references through the web-based user interface (UI). The assistant is designed for local deployment and utilizes private datasets, thereby addressing issues related to privacy and data security. The effectiveness of the assistant was evaluated by comparing it with LLM applications with web search. The results show that our method with a much smaller number of model parameters can deliver more precise and pertinent responses within the domain of radiation protection than web search-based systems. This work is a preliminary attempt to establish an intelligent assistant in the field of radiation protection, and it shows the potential for using LLM to increase efficiency in radiation protection-related tasks.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"519-529"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144542059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exposure to radon progeny and cancer mortality, excluding lung cancer, in the cohort of Newfoundland Fluorspar Miners between 1950 and 2016.","authors":"Paul J Villeneuve, Howard I Morrison, Rachel S D Lane","doi":"10.1007/s00411-025-01136-0","DOIUrl":"10.1007/s00411-025-01136-0","url":null,"abstract":"<p><p>The increased risk of lung cancer from radon progeny among Newfoundland fluorspar miners is well established. In the present study, an internal cohort analysis was conducted to investigate whether radon progeny is also associated with increased mortality from other cancers. Consequently, associations between cumulative radon progeny and cancer mortality (excluding lung cancer) were evaluated in a cohort of 2,110 miners. Mortality was ascertained from 1950 to 2016. Individual-level exposure to radon progeny in working level months (WLM) was determined for each miner during their employment. For cancers with at least ten deaths, Poisson regression was used to estimate excess relative risks (ERRs). Cancer site-specific relative risks were derived for mortality from common cancers within the cohort, specifically: colorectal, prostate, stomach and all cancers (excluding lung cancer). Relative risks were adjusted for age, calendar period, and the number of cigarettes smoked daily determined from smoking surveys. In total, 260 cancer deaths, excluding lung cancer, were identified during follow-up. The relative risk of death from these cancers was 1.26 (95% confidence interval (CI): 0.92, 1.75) among underground miners with a cumulative exposure of ≥ 50 WLM when compared to those with < 1 WLM. The ERR per 100 WLM for cancer mortality (excluding lung cancer) was 0.02 (95% CI=-0.01 to 0.05). No statistically significant increased risks with increasing exposure were found for bladder, colorectal, pancreatic, and stomach cancer. Overall, these findings provide modest evidence that radon progeny contributes to increased risks of cancer mortality (excluding lung cancer) among fluorspar miners. However, the precision of the estimates is limited by the small size of the cohort, which restricts the ability to draw firm conclusions regarding specific cancer sites. Future research should consider pooling data from radon-exposed occupational cohorts to better understand the association between radon exposure and the risk of cancers other than lung cancer.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"371-378"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12350461/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144660042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PHITS code Monte Carlo simulation of a gamma chamber 5000.","authors":"Okky Agassy Firmansyah, Budhy Kurniawan, Marta Walo, Urszula Gryczka, Bimo Saputro, Heru Prasetio, Ari Satmoko, Nunung Nuraeni","doi":"10.1007/s00411-025-01132-4","DOIUrl":"10.1007/s00411-025-01132-4","url":null,"abstract":"<p><p>Gamma Chamber 5000 (GC-5000) is a dry storage irradiator manufactured by the Board of Radiation and Isotope Technology, India. The GC-5000 can be employed as a facility for sample irradiation and dosimeter calibration purposes because of its dose distribution which is more homogeneous than that of large-scale gamma irradiators. However, optimizing the calibration service requires an in-depth understanding of the dose mapping within the sample chamber. This study aimed to demonstrate the applicability of a simulation using the Monte Carlo (MC) Proton Heavy-Ion Transport Code System (PHITS) software for determining the dose distribution within the GC-5000 irradiator at the Institute of Nuclear and Chemistry Technology (INCT), Poland, to validate the results in experiments using alanine dosimetry. Five measurement points were defined, with each point carrying four alanine dosimeters simultaneously irradiated in an in-house phantom manufactured from polymethyl methacrylate (PMMA). The in-house phantom and alanine dosimeters were additionally simulated with PHITS. The GC-5000 chamber was modeled consistently with the original GC-5000 design, which included the configuration of 44 Co-60 pencil sources and their activities. The relative differences between simulation and experiment for the five-point measurements were 0.7 % and 7.0 % for the minimum and maximum, respectively. The position with the best agreement was at the centre of the in-house PMMA phantom. It was found that the results of the MC simulation and the experimental dose mapping agreed. It is concluded that both methods can be used to precisely determine the dose rate at defined positions within the GC-5000. It is concluded that the methodology developed in this study, i.e., the integration of MC modeling and alanine dosimetry, provides a validated and practical approach for dose mapping and may serve as a reference for similar compact irradiators used in radiation processing. The methodology can also be extended to optimize other industrial radiation processing facilities, as it provides a robust framework for accurate dose calibration and dose rate mapping.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"447-457"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144275812","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CFD modeling of indoor radon distribution in a laboratory with granite countertops.","authors":"Bahareh Azarvand-Hassanfard, Mojtaba Gholami","doi":"10.1007/s00411-025-01131-5","DOIUrl":"10.1007/s00411-025-01131-5","url":null,"abstract":"<p><p>Radon gas, a significant source of indoor radiation exposure, poses serious health risks, particularly lung cancer. This study employs Computational Fluid Dynamics (CFD) using the ANSYS Fluent software to model the behaviour and distribution of radon gas in a laboratory space equipped with granite countertops. A three-dimensional model of the laboratory, including its geometry, ventilation rates, and radon exhalation sources, was developed to simulate radon concentrations, particularly at breathing height. Radon exhalation rate from the granite and other surfaces in the room was measured experimentally. Numerical results, validated by experimental measurements, revealed a 30% increase in average radon concentration following the installation of granite countertops with an exhalation rate of 6.5 Bq m^-2 h^-1. The spatial distribution of radon, particularly near the countertops, indicated regions where radon accumulated at concentrations exceeding the action threshold of the US Environmental Protection Agency of 148 Bq/m³. Additionally, while natural ventilation effectively reduced overall radon levels, its efficiency was diminished near the countertops due to complex airflow patterns, leading to radon accumulation in breathing zones. This study demonstrates the ability of numerical methods to identify centers of radon gas accumulation by predicting airflow patterns and behaviours at various ventilation rates, emphasizing the need for effective ventilation strategies, such as localized exhaust systems, to reduce radon exposure in critical areas.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"459-475"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144249374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Monte Carlo calculation of correction factors for determining the operational quantity [Formula: see text] in solid phantoms for ISO narrow series photon sources.","authors":"Vandana Shrivastava, T Palani Selvam, S M Pradhan","doi":"10.1007/s00411-025-01138-y","DOIUrl":"10.1007/s00411-025-01138-y","url":null,"abstract":"<p><p>Although previous studies already reported on backscatter and depth dose correction factors for a Polymethyl-methacrylate (PMMA) phantom to determine the operational quantity [Formula: see text], more comprehensive evaluations for a wider range of tissue-equivalent phantoms are limited. Besides addressing this gap, the present study also provides phantom scatter correction factors for various phantoms. Correction factors were calculated to determine the [Formula: see text] in solid phantoms (PMMA, Polystyrene, Solid Water, Plastic Water, Virtual Water, RW3, WE210, and A150) and the International Organisation for Standardisation (ISO)-recommended PMMA-walled water phantom involving detector materials such as air, LiF and Li₂B₄O₇ for ISO reference photon beams (N40, N80, N100, N150, N200, N250 x-rays and 662 keV gamma photon). The calculations were performed using the EGSnrc-based Monte Carlo code system. These correction factors include backscatter factor, depth dose factor and phantom scatter, for photon beams with normal incidence on the phantom. The calculated values of the backscatter and depth dose factors are in good agreement with published values for a PMMA phantom. The values of backscatter factor calculated in solid phantoms such as A150, Solid Water, Plastic Water, Virtual Water and WE210 were similar to those calculated in tissue phantom. The phantoms PMMA, Polystyrene and RW3 showed higher backscatter factor values in the energy range N40 - N100 as compared to the tissue phantom. The depth dose factors were comparable in all phantoms except in Polystyrene in which they were higher for N40 photons. The study shows that application of phantom scatter correction is important for phantoms such as PMMA (N40- N250), Polystyrene (N40- N150), RW3 (N40 & N80), Solid Water (N40 & N80), Virtual Water (N40 & N80) and WE210 (N40 & N80). A150, Plastic Water and PMMA-walled water phantoms behave like tissue-equivalent phantoms at all photon energies as the phantom scatter correction was in the range of 0.97-1.02, depending upon energy. This study demonstrates the importance of applying phantom scatter correction factors into the calculation of [Formula: see text], particularly for low-energy photon beams.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"379-389"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12350434/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144744490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Radon concentrations and CBC parameters in lung cancer patients at Al-Najaf governorate, Iraq.","authors":"Dhuha Jalil Lawi, Iman Sabah Obaid, Ali Abid Abojassim, Abdulhussein Abdulameer Alkufi","doi":"10.1007/s00411-025-01139-x","DOIUrl":"10.1007/s00411-025-01139-x","url":null,"abstract":"<p><p>The research described in this paper aimed to identify ²²²Rn concentrations in the serum of healthy individuals and lung cancer patients. Additionally, CBC parameters such as WBC (White Blood Cell count), RBC (Red Blood Cells), MCH (Mean Corpuscular Hemoglobin), and PLT (Platelets) were measured and their correlation with the corresponding ²²²Rn concentrations in the serum of the lung cancer patients was investigated. ²²²Rn concentrations in serum samples were measured using a CR-39 detector. The mean ²²²Rn concentration in the serum of the patients was 22.62 ± 3.85 Bq/m³, while that in serum of the healthy individuals was 2.72 ± 0.71 Bq/m³. Also, it was found that the mean WBC, RBC, MCH, and PLT levels in the serum of the patients were 7.15 ± 0.58 cells/L, 4.24 ± 0.17 cells/L, 29.23 ± 0.60 pg, and 285.52 ± 21.78 cells/L, respectively. The results revealed statistically significant differences in ²²²Rn concentrations when comparing the samples of the patients with those of the healthy individuals. In addition, a reasonable correlation was found (p < 0.01) between the ²²²Rn concentrations and MCH levels in serum of the patients. It is concluded that, given the observed correlations, further studies are necessary to investigate whether there is any causal relationship behind the observed correlations.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"477-485"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144732990","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synergistic effects of lead borosilicate waste glass on the mechanical and radiation shielding properties of cement-bitumen composites.","authors":"Abeer Maher, Elsayed Salama, Ramadan A Mohamed, Hosam M Saleh","doi":"10.1007/s00411-025-01130-6","DOIUrl":"10.1007/s00411-025-01130-6","url":null,"abstract":"<p><p>This study investigates the radiation shielding performance of lead borosilicate waste glass when incorporated as an additive into cement-bitumen composites. The utilization of lead borosilicate glass, a byproduct of industrial processes, offers a dual advantage: it enhances the gamma-ray attenuation capacity of the composite achieving a mass attenuation coefficient of 7.85 × 10⁻² cm²/g and simultaneously contributes to the sustainable management of radioactive waste by improving the compressive strength to 32.9 MPa. Cement-bitumen mixtures were prepared with varying concentrations of the waste glass and evaluated through both experimental measurements and theoretical modeling. The linear attenuation coefficients demonstrated a marked improvement in shielding efficiency with increasing lead content. Computational tools, including XCOM and Geant4, were employed to simulate photon interactions and validate the experimental findings. The simulation results were in strong agreement with experimental data, confirming the enhanced attenuation properties at higher glass concentrations. These findings suggest that lead borosilicate waste glass is a promising additive for improving the gamma radiation shielding properties of cement-bitumen matrices, with potential applications in nuclear waste immobilization and radiation protection. Furthermore, the approach promotes sustainable recycling of industrial waste, aligning with environmental conservation goals. Further research is recommended to optimize glass loading and assess the long-term durability and structural performance under diverse environmental conditions.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"505-517"},"PeriodicalIF":2.3,"publicationDate":"2025-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144151532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Application of the Avrami-Dobrzyński model for mammary tumorigenesis in irradiated rats indicates new candidates for parametric cancer risk assessment.","authors":"Julianna Krasowska, Tatsuhiko Imaoka, Krzysztof W Fornalski","doi":"10.1007/s00411-025-01125-3","DOIUrl":"10.1007/s00411-025-01125-3","url":null,"abstract":"<p><p>The two-parametric Avrami-Dobrzyński model, originally based on the condensed matter physics for phase transitions, was applied to the cumulative populational mammary cancer data of laboratory rats. The joint effect of parity, irradiation and BRCA1 mutation on breast cancer incidence was analysed. The study showed that the proposed model fits well with the data points, however, the values of parameters differ regarding the investigated group of animals. It was concluded that both model's parameters, which relate to the dimension of carcinogenesis dynamics and the age distribution, are good candidates for cancer risk assessment regarding different risk factors.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"229-239"},"PeriodicalIF":1.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143796106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comparative dosimetric assessment of combined treatment modalities in cervical cancer radiotherapy for optimal organ protection.","authors":"Iozsef Gazsi, Loredana G Marcu","doi":"10.1007/s00411-025-01113-7","DOIUrl":"10.1007/s00411-025-01113-7","url":null,"abstract":"<p><p>External radiotherapy combined with internal radiotherapy in cervical cancer can provide a boost to the target volume to increase tumour control. At the same time internal radiotherapy protects neighboring organs. The aim of the present study was to dosimetrically compare three external beam radiotherapy techniques each combined with internal radiotherapy to evaluate the combination that offers the best organ protection. Treatment plans of 20 cervical cancer patients were created for external (including three-dimensional conformal radiotherapy (3D-CRT), intensity modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT)) as well as brachytherapy. The prescribed dose was 50 Gy in 25 fractions for external and 21 Gy in three fractions for internal radiotherapy. The following organs at risk (OARs) were evaluated: bladder, rectum, sigmoid and bowel bag. The study analyzed the results of different treatment combinations in terms of dosimetric values for various parameters. The D₉₀ for the clinical target volume was around 120 Gy, with the highest value seen in 3D-CRT + BT (brachytherapy) combination at 120.59 Gy. For the bladder, the D_2cc remained below the recommended threshold of 90 Gy, with the lowest value obtained for the BT + IMRT combination at 79.2 Gy. For the rectum, both D_2cc and D_1cc remained below the recommended threshold of 75 Gy for both parameters. All techniques fell below the recommended dose of 75 Gy for the sigmoid. For the intestine, there were statistically significant differences between BT + IMRT and BT + 3D-CRT. The VMAT technique showed superiority over IMRT in tumour volume coverage and several organ-at-risk parameters. Generally, intensity-modulated techniques showed dosimetric advantage over the traditional 3D technique in cervical cancer. In addition to providing better compliance and homogeneity, they provided superior protection for organs at risk, especially for bowel bag. It is concluded that the BT + IMRT technique provided the best protection for organs at risk based on the lowest OAR dosimetric values, especially for the intestine.</p>","PeriodicalId":21002,"journal":{"name":"Radiation and Environmental Biophysics","volume":" ","pages":"291-302"},"PeriodicalIF":1.5,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC12049278/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143537777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}