一种共合成固体氧化物燃料电池复合阴极材料的方法

本专利提供一种共合成固体氧化物燃料电池复合阴极材料的方法，该方法将所需的复合阴极原驱体材料一起溶解得一澄清溶液体系，将反应试剂加入该体系中，调节pH值使反应试剂完全溶解，加热反应蒸水得透明溶胶，将该溶胶移至电炉上加热燃烧后得复合物初粉，高温焙烧后该粉体材料具有钙钛矿和立方萤石相，是混合离子电子导体，颗粒细且均匀，比表面积大。用作固体氧化物燃料电池阴极，其作为电化学活性位的三相界面多且均匀分布于整个阴极体相，有利于提高电池性能。待填

Research Progress and Prospect of Sediment Environment and Pollution Control in China in Recent 20 Years

Inland water bodies(lakes,reservoirs,swamps,rivers)and estuarine oceans are widely and continuously distributed with sediments,which are affected by natural and human activities in the process of their formation,and have environmental significance and characteristics related to pollutants. There are great regional differences in China,and the environmental problems are more prominent. After decades of research on sediment environment and pollution control,the relevant achievements in China continue to emerge. This paper first introduces some international landmark studies on sediment environment and reviews the development of sediment research in China in the past 70 years.Then,the main research progress of China in the research fields of sediment environment and pollution control in recent 20 years are systematically summarized,which are the role and effect of sediment in water environment,environmental behavior and influencing factors of pollutants at sediment-water interface,ecological risk and quality criteria of sediments,in-situ remediation of contaminated sediments,environmental dredging and ex-situ disposal as well utilization of contaminated sediments. And the relationship and difference of some research results are reviewed. At the end of the paper,the existing problems of sediment environmental research in China are analyzed,and several scientific and technical problems that need to be studied urgently and deeply,such as interdisciplinary,composite pollution,emerging/non-traditional pollutants, quality criteria, and governance technology innovation, are put forward. The solutions and approaches are proposed,and the prospects are also given

Expression of manganese superoxide dismutase in patients with breast cancer

AbstractBreast cancer has become the second leading cancer among females in Taiwan. Even though the etiology of breast cancer is multifactorial, oxidative stress plays an important role in the carcinogenesis. The purpose of this study was to investigate the expression of manganese superoxide dismutase (MnSOD), one of the major antioxidant enzymes that is involved against oxidative stress, in adjacent cancer-free breast tissues and neoplasm tissues within the same patient. Sixty-five breast cancer patients’ formalin-fixed tissue blocks, including ductal carcinoma in situ (DCIS) tissues, invasive ductal carcinoma (IDC) tissues, and adjacent cancer-free tissues, were evaluated by immunohistochemical stain. Meanwhile, their demographic and clinical information was also collected. The combined scores of MnSOD-positive cell proportion and MnSOD staining intensity were compared for different tissues within the same patient. The results showed that the mean combined scores of MnSOD expression in adjacent cancer-free tissues (6.33), IDC (5.30), and DCIS (3.78) were significantly different when assessed by repeated-measurement analysis of variance (F=14.17, p<0.001). Additionally, the results revealed that the distribution of strong MnSOD protein expression was 80.0%, 72.3%, and 52.3% in adjacent cancer-free tissues, IDC, and DCIS, respectively. However, there was no statistically significant relationship between the expression of MnSOD and grades of breast cancer or other clinicopathologic variables. We suggest that the expression of MnSOD in neoplasm tissues, independent of the clinicopathologic characters, plays a critical role in breast cancer biology

Prediction of Energy Resolution in the JUNO Experiment

International audienceThis paper presents the energy resolution study in the JUNO experiment, incorporating the latest knowledge acquired during the detector construction phase. The determination of neutrino mass ordering in JUNO requires an exceptional energy resolution better than 3% at 1 MeV. To achieve this ambitious goal, significant efforts have been undertaken in the design and production of the key components of the JUNO detector. Various factors affecting the detection of inverse beta decay signals have an impact on the energy resolution, extending beyond the statistical fluctuations of the detected number of photons, such as the properties of liquid scintillator, performance of photomultiplier tubes, and the energy reconstruction algorithm. To account for these effects, a full JUNO simulation and reconstruction approach is employed. This enables the modeling of all relevant effects and the evaluation of associated inputs to accurately estimate the energy resolution. The study reveals an energy resolution of 2.95% at 1 MeV. Furthermore, the study assesses the contribution of major effects to the overall energy resolution budget. This analysis serves as a reference for interpreting future measurements of energy resolution during JUNO data taking. Moreover, it provides a guideline in comprehending the energy resolution characteristics of liquid scintillator-based detectors

JUNO Sensitivity on Proton Decay p→νˉK+p\to \bar\nu K^+ Searches

The Jiangmen Underground Neutrino Observatory (JUNO) is a large liquid scintillator detector designed to explore many topics in fundamental physics. In this paper, the potential on searching for proton decay in $p\to \bar\nu K^+$ mode with JUNO is investigated.The kaon and its decay particles feature a clear three-fold coincidence signature that results in a high efficiency for identification. Moreover, the excellent energy resolution of JUNO permits to suppress the sizable background caused by other delayed signals. Based on these advantages, the detection efficiency for the proton decay via $p\to \bar\nu K^+$ is 36.9% with a background level of 0.2 events after 10 years of data taking. The estimated sensitivity based on 200 kton-years exposure is $9.6 \times 10^{33}$ years, competitive with the current best limits on the proton lifetime in this channel