Publications in both the lay and academic press suggest that the problem of long waiting lists for deceased donor kidney transplants could be solved if only the National Organ Transplant Act were changed to permit various forms of financial incentives to kidney donors. The history of the debate over payments to donors is discussed with particular emphasis on the national and international ramifications of such payments, the effect on normative altruistic donation, and the nature of the relationship between the doctor and the patient in the donor workup process. A way forward is proposed through the promotion of financial neutrality and expanded efforts to prevent CKD.
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http://dx.doi.org/10.2215/CJN.0000000633 | DOI Listing |
Environ Res
January 2025
Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; Earth Critical Zone and Flux Research Station of Xing'an Mountains, Chinese Academy of 15 Sciences, Daxing'anling 165200, China; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 10049, China. Electronic address:
Accurate quantifying of methane (CH) emissions is a critical aspect of current research on regional carbon budgets. However, due to limitations in observational data, research methodologies, and an incomplete understanding of process mechanisms, significant uncertainties persist in the assessment of wetland CH fluxes in China. In this study, we developed a machine learning model by integrating measured CH fluxes with related environmental data to produce a high-resolution (1 km) dataset of CH fluxes from China's wetlands for the period 2000-2020.
View Article and Find Full Text PDFBioresour Technol
January 2025
College of Materials Engineering, Fujian Agriculture and Forestry University, Fuzhou 350002 Fujian, China. Electronic address:
The aviation industry plays a crucial role in global trade and cultural exchange, but it faces significant challenges due to high fuel costs and environmental impacts. To achieve carbon neutrality, promoting the development of sustainable aviation fuel (SAF) is essential, with projections indicating that 65% of emissions reductions in the aviation industry by 2050 will come from the use of SAF. Lignin, as an abundant renewable resource, has great potential for conversion into aviation fuel components.
View Article and Find Full Text PDFSci Total Environ
January 2025
Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming 650500, China.
Ammonia is a highly promising carbon-neutral fuel. The use of ammonia as a fuel for internal combustion engines can reduce fossil energy consumption and greenhouse gas emissions. However, the high ignition energy required for ammonia and the slow flame propagation rate result in low combustion efficiency when ammonia is used directly in internal combustion engines.
View Article and Find Full Text PDFSci Total Environ
January 2025
College of Environmental Science and Engineering, Tongji University, State Key Laboratory of Pollution Control and Resource Reuse, Ministry of Education Key Laboratory of Yangtze River Water Environment, Shanghai 200092, China; Frontiers Science Center for Intelligent Autonomous Systems, Shanghai 200092, China; Institute of Carbon Neutrality, Tongji University, Shanghai 200092, China. Electronic address:
Mangrove ecosystems, a type of blue carbon ecosystems (BCEs), are vital to the global carbon cycle. However, the combined effects of microplastics (MPs) and plastic additives on carbon sequestration (CS) in mangroves remain unclear. Here, we comprehensively review the sources, occurrence, and environmental behaviors of MPs and representative plastic additives in mangrove ecosystems, including flame retardants, such as polybrominated diphenyl ethers (PBDEs), and plasticizers, such as phthalate esters (PAEs).
View Article and Find Full Text PDFJ Math Biol
January 2025
Instituto de Ingeniería Matemática, Universidad de Valparaíso, Valparaíso, Chile.
We study the large-time behavior of an ensemble of entities obeying replicator-like stochastic dynamics with mean-field interactions as a model for a primordial ecology. We prove the propagation-of-chaos property and establish conditions for the strong persistence of the N-replicator system and the existence of invariant distributions for a class of associated McKean-Vlasov dynamics. In particular, our results show that, unlike typical models of neutral ecology, fitness equivalence does not need to be assumed but emerges as a condition for the persistence of the system.
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