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Contribution of fungal biomass to persistent soil carbon across natural ecosystems

Science China Earth Sciences 2025年

作者： Xiang WANG Guang-hui yu Yakov KUZYAKOV Bo-Hao YIN Andreas KAPPLER Cong-Qiang LIU Bohai Coastal Critical Zone National Observation and Research Station Institute of Surface-Earth System Science School of Earth System Science Tianjin Key Laboratory of Earth Critical Zone Science and Sustainable Development in Bohai Rim Tianjin University Department of Soil Science of Temperate Ecosystems Department of Agricultural Soil Science University of G?ttingen Agro-Technological Institute Peoples Friendship University of Russia (RUDN University) Geomicrobiology Center for Applied Geosciences University of Tübingen Cluster of Excellence EXC 2124 Controlling Microbes to Fight Infection University of Tübingen

Fungi are known to be crucial in the formation and stabilization of soil organic matter through their exudates and dead residues (necromass). Yet, it remains unclear how fungi contribute to the persistence of carbon in soils over millennial scales across biomes. Here, this study fills the knowledge gap by linking fungal carbon stocks with minerals-associated carbon stocks across major biomes. A strong correlation between fungal biomass and reactive mineral-associated carbon stocks in soils across six biomes supports the substantial role of fungi in soil carbon persistence at the global level. High spatial resolution nanoscale secondary ion mass spectrometry revealed that fungi may stabilize carbon by forming organo-mineral associations through their close physical connection to reactive minerals and weathered nanoparticles. We propose a conceptual model that emphasizes the dualistic role of hypha-mineral interactions:(i) fungi accelerate organic matter decomposition by producing reactive oxygen species on the hypha-mineral interfaces, and (ii) fungi stabilize their residues on mineral surfaces, leading to millennial scale persistence of soil C. Concluding, fungi play a fundamental role in ecosystems that extends beyond the decomposition of persistent carbon. They are crucial in stabilizing carbon on mineral surfaces, thereby facilitating the long-term removal of carbon from rapid biotic cycling.

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突发公共卫生事件下投资者情绪对股票市场的影响研究

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江苏商论 2025年第1期 77-82页

作者：于慧佳昆明理工大学管理与经济学院云南昆明650504

2019年12月底,由美国暴发的新冠疫情传入中国,疫情对全球、全国的经济造成了显著影响,全球股市也进入寒冬。股市是经济的晴雨表,在中国的股票市场中,有超过九成的投资者属于个人投资者,个人投资者的情绪反映与股票市场的涨跌息息相关。... 详细信息

2019年12月底,由美国暴发的新冠疫情传入中国,疫情对全球、全国的经济造成了显著影响,全球股市也进入寒冬。股市是经济的晴雨表,在中国的股票市场中,有超过九成的投资者属于个人投资者,个人投资者的情绪反映与股票市场的涨跌息息相关。基于此,论文选取换手率、成交量、腾落比例、融资融券余额和百度搜索指数这5个单项指标通过主成分分析法建立投资者情绪综合指标。同时选取相关指标构建疫情综合指标,并通过VAR模型、Granger因果检验、脉冲响应分析、方差分解等方法考察二者与股票收益率之间的关系,同时,提出建议。

关键词：冲击事件投资者情绪主成分分析 VAR 脉冲响应

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开塞通联合阿司匹林对缺血性中风患者神经功能及脑血流灌注参数的影响

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中国药业 2025年第1期34卷 97-100页

作者：何泉余晖湖北省咸宁市中医医院湖北咸宁437100

目的探讨开塞通胶囊联合阿司匹林治疗缺血性中风(IS)的临床疗效,以及对患者神经功能及脑血流灌注参数的影响。方法选取医院2022年1月至2023年1月收治的IS患者140例,按随机数字表法分为联合组和对照组,各70例。两组患者均予常规疗法联合... 详细信息

目的探讨开塞通胶囊联合阿司匹林治疗缺血性中风(IS)的临床疗效,以及对患者神经功能及脑血流灌注参数的影响。方法选取医院2022年1月至2023年1月收治的IS患者140例,按随机数字表法分为联合组和对照组,各70例。两组患者均予常规疗法联合阿司匹林治疗,联合组加用开塞通,均治疗1个月。结果联合组总有效率为91.43%,显著高于对照组的71.43%(P<0.05)。治疗后,两组患者的美国国立卫生研究院卒中量表(NIHSS)评分均显著降低(P<0.05),日常生活活动能力量表(BI)评分均显著升高(P<0.05),且联合组均显著优于对照组(P<0.05);两组患者的脑血流量、脑血容量均显著升高(P<0.05),平均通过时间、达峰时间均显著缩短(P<0.05),且联合组均显著优于对照组(P<0.05);两组患者的记忆商数评分均显著升高(P<0.05),可溶性细胞间黏附分子-1和S100β水平均显著降低(P<0.05),且联合组均显著优于对照组(P<0.05)。联合组和对照组不良反应发生率相当(1.43%比4.29%,P=0.310)。结论开塞通联合阿司匹林治疗IS的临床疗效良好,可改善患者的神经功能,提高灌注参数和生活质量,且安全性良好。

关键词：缺血性中风开塞通阿司匹林神经功能脑血流灌注参数临床疗效

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Typical Cell Signaling Response to Ionizing Radiation: DNA Damage and Extranuclear Damage

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Chinese Journal of Cancer Research 2012年第2期24卷 83-89页

作者： hui yu Department of Radiation Oncology University of Texas Health Science Centerat San Antonio7703 Floyd Curl DriveSan AntonioTexas 78229USA

To treat many types of cancer, ionizing radiation （IR） is primarily used as external-beam radiotherapy, brachytherapy, and targeted radionuclide therapy. Exposure of tumor cells to JR can induce DNA damage as well as generation of reactive oxygen species （ROS） and reactive nitrogen species （RNS） which can cause non-DNA lesions or extracellular damage like lipid perioxidation. The initial radiation-induced cell responses to DNA damage and ROS like the proteolytic processing, as well as synthesis and releasing ligands （such as growth factors, cytokines, and hormone） can cause the delayed secondary responses in irradiated and unirradiated bystander cells through paracrine and autocrine pathways.

关键词： Radiation Bystander effect DNA damage Extranuclear damage

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HOW DOES THE RETAILER MAKE PRICING DECISION WHEN CONSUMERS HAVE JUSTICE REFERENCE PRICE

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Journal of Systems Science and Systems Engineering 2015年第4期24卷 433-449页

作者： huimin Liu hui yu School of Economics and Business Administration Chongqing University

A series of studies demonstrate that consumers have fairness judgments about the retailer＇s price which will impact their shopping decisions. Thus, it is necessary for the retailer to take consumers＇ fairness concerns into account when setting his pricing policies. We assume that when the retailer＇s price is lower than a consumer＇s justice reference price, the consumer is likely to sense a positive price unfairness that will lead to increased consumer utility, and when the retailer＇s price is higher than a consumer＇s justice reference price, the consumer is likely to sense a negative price unfairness-that will have a negative effect on consumer utility. According to the information conditions of the consumers＇ justice reference price, the retailer should consider three situations： certain information, random information and partial information. In all situations, we show that the retailer has a unique optimal pricing strategy. Finally, through numerical examples, we find that our distribution-free policies perform almost the same as the results under the distributions that maximize the entropy. Our results reveal that it is important for the retailer to consider consumers＇ fairness concerns, otherwise he may suffer losses when Pc is very small.

关键词： Justice reference price certain information random information partial information,pricing strategy

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THE DISTRIBUTION-FREE NEWSVENDOR PROBLEM WITH BALKING AND PENALTIES FOR BALKING AND STOCKOUT

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Journal of Systems Science and Systems Engineering 2014年第2期23卷 153-175页

作者： hui yu Jia Zhai School of Economics and Business Administration Chongqing University School of Business Administration Chongqing University of Technology

This paper investigates the ordering policy for the newsvendor problem with customer balking and penalties for balking and stockout. Our analysis is based on the assumption that only the mean and the variance of the demand distribution are known. In contrast to the existing research, we provide a new tradeoff tool as a replacement of the traditional one to weigh the holding cost and the goodwill cost segment： the balking penalty cost and the stockout penalty cost. Specifically, in addition to the stockout penalty, we also introduce the balking penalty, provide a new proof of the optimality of robust ordering policy to guarantee that the lower bound of expected profit obtained by us is tight, and get an robust optimal order quantity which is an exact solution but not an approximate one as before. Numerical experiments are conducted to illustrate the effect of penalties for balking and stockout.

关键词： Newsvendor problem distribution-free customer balking balking penalty stockout penalty

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A PARTIAL ROBUST OPTIMIZATION APPROACH TO INVENTORY MANAGEMENT FOR THE OFFLINE-TO-ONLINE PROBLEM UNDER DIFFERENT SELLING PRICES

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Journal of Systems Science and Systems Engineering 2017年第6期26卷 774-803页

作者： hui yu Jie Deng School of Economics and Business Administration Chongqing University Chongqing China

This study examines an optimal inventory strategy when a retailer markets a product at different selling prices through a dual-channel supply chain, comprising an online channel and an offiine channel. Using the operating pattern of the offiine-to-online （020） business model, we develop a partial robust optimization （PRO） model. Then, we provide a closed-form solution when only the mean and standard deviation of the online channel demand distribution is known and the offiine channel demand follows a uniform distribution （partial robust）. Specifically, owing to the good structural properties of the solution, we obtain a heuristic ordering formula for the general distribution case （i.e., the offiine channel demand follows a general distribution）. In addition, a series of numerical experiments prove the rationality of our conjecture. Moreover, after comparing our solution with other possible policies, we conclude that the PRO approach improves the performance of incorporating the internet into an existing supply chain and, thus, is able to adjust the level of conservativeness of the solution. Finally, in a degenerated situation, we compare our PRO approach with a combination of information approach. The results show that the PRO approach has more ＂robust＂ performance. As a result, a reasonable trade-off between robustness and performance is achieved.

关键词： Supply chain management partial robust optimization decision support inventory,dual-channel

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Novel eco-friendly spherical porous adsorbent fabricated from Pickering middle internal phase emulsions for removal of Pb(Ⅱ) and Cd(Ⅱ)

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Journal of Environmental Sciences 2022年第2期34卷 320-330页

作者： hui yu Yongfeng Zhu Aiping hui Aiqin Wang Key Laboratory of Clay Mineral Applied Research of Gansu Province Center of Eco-material and Green ChemistryLanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Spherical porous materials prepared from the emulsion template used in the water treatment have displayed a vast prospect, as the high surface area, abundant porous structure, convenient operation and excellent adsorption performance. But the tedious fabrication process, high consumption of organic solvent and surfactant limited the application widely. Herein, a facile and eco-friendly spherical porous adsorbent(SPA) is fabricated from the green surfactant-free(corn oil)-in-water Pickering medium internal phase emulsions(Pickering MIPEs) via the convenient ion crosslinking procedure. The Pickering MIPEs synergistically stabilized with the semi-coke(SC), which is the natural particle produced from the shale oil distillation, and sodium alginate(SA) has excellent storage and anti-coalescence stability. The as-prepared porous adsorbent possessed the abundant pore structure, which provided favorable conditions for effective mass transfer in adsorption, and could be tuned by varying the SA dosage. The saturation adsorption capacities of Pb(II) and Cd(II) can be achieved with 460.54 and 278.77 mg/g within 45 min at 25 ℃, respectively. Overall, this study supplied a viable and eco-friendly route for fabricating the spherical porous adsorbent with a tunable porous structure for heavy metal ion wastewater.

关键词： Spherical porous adsorbent(SPA) Emulsion template Semi-coke Adsorption Heavy metal ion

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Existence Results for Superlinear Elliptic Equations with Nonlinear Boundary Value Conditions

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Acta Mathematica Sinica,English Series 2019年第10期35卷 1655-1680页

作者： Xiao hui yu College of Mathematics and Statistics Shenzhen University

In this paper, we study the existence of solutions for the following superlinear elliptic equation with nonlinear boundary value condition{-△u+u=|u|^r-2u in Ω,■u/■v=|u|^q-2u on ■Ω, where Ω■R^N, N≥3 is a bounded domain with smooth boundary. We will prove the existence results for the above equation under four different cases:(i) Both q and r are subcritical;(ii) r is critical and q is subcritical;(iii) r is subcritical and q is critical;(iv) Both q and r are critical.

关键词： Existence result critical exponent trace inequality nonlinear boundary value (PS) condition

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Stretch-induced human myometrial cytokines enhance immune cell recruitment via endothelial activation

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Cellular & Molecular Immunology 2015年第2期12卷 231-242页

作者： yu-hui Lee Lunenfeld-Tanenbaum Research Institute Mount Sinai Hospital Toronto Canada Department of Physiology University of Toronto Toronto Canada Department of Obstetrics & Gynecology University of Toronto Toronto Canada

Spontaneous term labour is associated with amplified inflammatory events in the myometrium including cytokine production and leukocyte infiltration; however, potential mechanisms regulating such events are not fully understood. We hypothesized that mechanical stretch of the uterine wall by the growing fetus facilitates peripheral leukocyte extravasation into the term myometrium through the release of various cytokines by uterine myocytes. Human myometrial cells （hTERT-HM） were subjected to static mechanical stretch; stretch-conditioned media was collected and analysed using 48-plex Luminex assay and ELISA. Effect of stretch-conditioned media on cell adhesion molecule expression of human uterine microvascular endothelial cells （UtMVEC-Myo） was detected by quantitative polymerase chain reaction （qPCR） and flow cytometry; functional assays testing leukocyte-endothelial interactions： adhesion of leukocytes to endothelial cells and transendothelial migration of calcein-labelled primary human neutrophils as well as migration of THP-1 monocytic cells were assessed by fluorometry. The current in vitrostudy demonstrated that mechanical stretch （i） directly induces secretion of multiple cytokines and chemokines by hTERT-HM cells （IL-6, CXCL8, CXCL1, migration inhibitory factor （MIF）, VEGF, G-CSF, IL-12p70, bFGF and platelet-derived growth factor subunit B （PDGF-bb）, P〈0.05）; stretch-induced cytokines （ii） enhance leukocyte adhesion to the endothelium of the surrounding uterine microvasculature by （iii） inducing the expression of endothelial cell adhesion molecules and （iv） directing the transendothelial migration of peripheral leukocytes. （vi） Chemokine-neutralizing antibodies and broad-spectrum chemokine inhibitor block leukocyte migration. Our data provide a proof of mechanical regulation for leukocyte recruitment from the uterine blood vessels to the myometrium, suggesting a putative mechanism for the leukocyte infiltrate into the uterus during labour and postpartum involu

关键词： endothelium labour leukocyte infiltration stretch uterus

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