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Blockchain adoption or contingent sourcing? Advancing food supply chain resilience in the post-pandemic era

Frontiers of Engineering Management 2023年第1期10卷 107-120页

作者： Xiutian SHI siru chen Xiaofan LAI School of Economics and Management Nanjing University of Science and TechnologyNanjing 210094China Institute of Big Data Intelligent Management and Decision College of ManagementShenzhen UniversityShenzhen 518060China

In the post-pandemic era, food supply chains and firms therein are facing unprecedented severe challenges, because once infection is detected, numerous products must be recalled or abandoned, and both suppliers and retailers in the supply chain suffer enormous loss. To survive under the pandemic, retailers have adopted different sourcing strategies, such as contingent sourcing, which, in turn, affect the upstream suppliers and hence the resilience of the whole supply chain. With the rapid development of digital technologies, retailers nowadays can utilize blockchain as a reliable and efficient way to reduce product risk and hence advance the resilience of food supply chains by improving product traceability and inspection accuracy, and making sourcing transparent. In this paper, we develop a game-theoretic model to investigate the interrelation between the retailer’s decisions on blockchain adoption and sourcing strategies. We consider that a retailer originally orders from a risky supplier while conducting an imperfect inspection to detect infected products before selling. The retailer may speculatively keep on ordering from the risky supplier or adopt contingent sourcing by ordering from an alternative safe supplier. The retailer also has an option to implement blockchain to improve the inspection accuracy and product traceability. We derive the optimal retail prices under different sourcing strategies with and without blockchain adoption and then analyze the incentives for sourcing strategy and blockchain adoption. Then, we identify the conditions of an all-win situation for food retailer, supplier, supply chain resilience, and consumers with/without government subsidy. Finally, we extend to consider the situation that some consumers have health-safety concerns and preferences for blockchain adoption.

关键词： food supply chain blockchain contingent sourcing supply chain resilience

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Interface Engineering and Anion Engineering of Mo-Based Heterogeneous Electrocatalysts for Hydrogen Evolution Reaction

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Energy & Environmental Materials 2023年第1期6卷 87-104页

作者： Zehao Yin Xuan Liu siru chen Tingli Ma Yanqiang Li State Key Laboratory of Fine Chemicals School of Chemical EngineeringDalian University of TechnologyPanjin CampusPanjin 124221China School of Material and Chemical Engineering Centre for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007China Department of Materials Science and Engineering China Jiliang UniversityHangzhou 310018China Graduate School of Life Science and Systems Engineering Kyushu Institute of TechnologyKitakyushu Fukuoka 808-0196Japan

Development and utilization of hydrogen energy is an effective way to achieve carbon neutrality,only hydrogen production through electrolytic water splitting meets the goal of zero carbon emission.To facilitate the large-scale commercialization of water splitting devices,the development of highly efficient and low-cost catalysts to reduce the energy consumption is essential.MoS_(2)has been regarded as a promising electrocatalyst to replace platinum in hydrogen evolution reaction due to its low price and unique 2D layered structure.However,the poor conductivity and inert basal planes of MoS_(2)limited its wide-spread application.Recently,researches have demonstrated that the conductivity and active sites of MoS_(2)can be improved by heteroatoms doping or constructing of heterogeneous structures.In this review,the recent progress of Mo-based catalysts are summarized centered on MoS_(2)based on interface engineering and anion engineering,including MoS_(2)–MoO_(2),MoS_(2)–Mo_(2)C,MoS_(2)–MoN_(x),MoS_(2)–MoP,and MoS_(2)–MoSe_(2).The preparation method,structure,and performance of the catalysts are introduced and the possible mechanism behind the improved catalytic activity are revealed to give readers an overall comprehension on the progress of the Mo-based electrocatalysts for hydrogen evolution reaction.In addition,an outlook on future opportunities and development directions of Mo-based catalysts are proposed to facilitate the development of Mo-based catalysts for hydrogen production.

关键词： electrocatalysis heterostructure hydrogen evolution reaction Mo-based catalysts

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20μm Li metal modified with phosphate rich polymer-inorganic interphase applied in commercial carbonate electrolyte

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Journal of Energy Chemistry 2023年第1期76卷 233-238,I0006页

作者： Lin Lin Wei Lu Feipeng Zhao siru chen Jia Liu Haiming Xie Yulong Liu School of Chemistry Northeast Normal UniversityChangchun 130024JilinChina Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal UniversityChangchun 130103JilinChina College of Information Technology Jilin Normal UniversitySiping 13600oJilinChina Department of Mechanical and Materials Engineering Western UniversityLondon N6A 3K7Canada

Li metal batteries are supposed to reach real application in order to fulfill the high-energy density requirement of energy storage system.Unfortunately,the commonly used carbonate electrolyte react with pristine Li,which result in short lifetime of lithium metal battery.To alleviate the side reactions of Li metal with liquid electrolyte,here we propose a phosphate rich polymer-inorganic layer as an interphase.Due to the inert properties of lithium phosphate derived from LiPO_(2)F_(2)and poly-ether,the side-reaction of carbonate solvent are prevented.As a result,lithium metal anode sustains for 800 cycles in symmetrical cell test under 1 m A cm^(-2).Even under strict condition(20μm Li,capacity ratio N/P=2.3,electrolyte/active material=3μL mg^(-1)),coin cell test still runs stable for 150 cycles with high Coulombic efficiency.Furthermore,both LiFePO_(4)and LiNi_(0.8)Co_(0.1)Mn_(0.1)O_(2)pouch cell under 5μL m A^(-1)h^(-1)condition also exhibit good stability at 0.5 C and 2 C rate.With this approach,high-energy and high-power Li metal batteries are approaching to real application in the near future.

关键词： Lithium metal anode Lithium phosphate Ultra-thin Lithium Solid electrolyte interphase

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Lattice confined Ru single sites in hollow Co_(9)S_(8)polyhedron triggering Co-S-Ru catalytic centers for rechargeable Zn-air battery

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Nano Research 2023年第5期16卷 6701-6709页

作者： Xuan Liu siru chen Huicheng Wang Anmin Liu Shizheng Wen Liwei Mi Yanqiang Li School of Chemical Engineering Dalian University of TechnologyPanjin CampusPanjin 124221China School of Material and Chemical Engineering Center for Advanced Materials ResearchZhongyuan University of TechnologyZhengzhou 450007China School of Materials Science and Engineering North China University of Water Resources and Electric PowerZhengzhou 450045China School of Physics and Electronic Electrical Engineering Huaiyin Normal UniversityHuai’an 223300China

Single-atom catalysts with precise structure and tunable coordination nature provide opportunities for developing novel catalytic centers and understanding reaction mechanisms.Herein,hollow Co_(9)S_(8)polyhedrons with lattice-confined Ru single atoms(Ru-Co_(9)S_(8))are fabricated.Aberration-corrected scanning transmission electron microscopy and X-ray absorption spectroscopy verify the isolated Ru atoms are confined in Co_(9)S_(8)to form Co-S-Ru catalytic centers.Theoretical calculations indicate that the oxygen evolution reaction(OER)and oxygen reduction reaction(ORR)energy barriers are extensively reduced,the d-band center of Co_(9)S_(8)downshifts from the Fermi level,therefore boosting the desorption of O-containing intermediates.Consequently,the Ru-Co_(9)S_(8)exhibits an ultralow overpotential of 163 mV at 10 mA·cm^(−2)for OER and could catalyze a rechargeable Zn-air battery with a high-power density of 92.0 mW·cm^(−2).This work provides a promising approach for designing novel bifunctional catalytic active centers for energy conversion.

关键词： electrocatalysis single-atom catalysts lattice confinement bifunctional catalysts Zn-air battery

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Anchoring polysulfide with artificial solid electrolyte interphase for dendrite-free and low N/P ratio Li-S batteries

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Journal of Energy Chemistry 2023年第5期80卷 32-39,I0002页

作者： Wei Lu Zhao Wang Guiru Sun Shumin Zhang Lina Cong Lin Lin siru chen Jia Liu Haiming Xie Yulong Liu Key Laboratory of Functional Materials Physics and Chemistry Ministry of Education Jilin Normal UniversityChangchun 130103jilinChina College of Information Technology Jilin Engineering Research Center of Optoelectronic Materials and DevicesJilin Normal UniversitySiping 136000JilinChina Department of Mechanical and Materials Engineering Western UniversityChangchun 130024JilinChina School of Chemistry Northeast Normal UniversityLondon N6A 3K7Canada

Lithium sulfur batteries are regarded as a promising candidate for high-energy-density energy storage devices.However,the lithium metal anode in lithium-sulfur batteries encounters the problem of lithium dendrites and lithium metal consumption caused by polysulfide corrosion.Herein we design a dualfunction PMMA/PPC/LiNO3composite as an artificial solid electrolyte interphase(PMCN-SEI)to protect Li metal anode.This SEI offers multiple sites of C=O for polysulfide anchoring to constrain corrosion of Li metal anode.The lithiated polymer group and Li3N in PMCN-SEI can homogenize lithium-ion deposition behavior to achieve a dendrite-free anode.As a result,the PMCN-SEI protected Li metal anode enables the Li||Li symmetric batteries to maintain over 300 cycles(1300 h)at a capacity of 5 m Ah cm^(-2),corresponding to a cumulative capacity of 3.25 Ah cm^(-2).Moreover,Li-S batteries assembled with 20μm of Li metal anode(N/P=1.67)still deliver an initial capacity of 1166 m A h g-1at 0.5C.Hence,introducing polycarbonate polymer/inorganic composite SEI on Li provides a new solution for achieving the high energy density of Li-S batteries.

关键词： Thin Limetal anode Solid electrolyte interphase(SEI) Lithium-sulfur(Li-S)batteries Polymer/inorganic composite Polycarbonate

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2D nanoplate assembled nitrogen doped hollow carbon sphere decorated with Fe3O4 as an efficient electrocatalyst for oxygen reduction reaction and Zn-air batteries

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Nano Research 2019年第11期12卷 2774-2780页

作者： Yanqiang Li Huiyong Huang siru chen Xin Yu Chao Wang Tingli Ma State Key Laboratory of Fine Chemicals School of Ptroleumn and Chemical Eninering Dalian Univrsity of Tehnologos Panjin CampusPanjin 124221China Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology 2-4 HibikinoWakamatsuKitakyushuFukuoka 808-0196Japan Center for Advanced Materials Research Zhongyuan University of TechnologyZhengzhou 450007China

Designing a highly efficient non-precious based oxygen reduction reaction(ORR)electrocatalyst is critical for the commercialization of various sustainable energy storage and conversion devices such as metal-air batteries and fuel cells.Herein,we report a convenient strategy to synthesis Fe3O4 embedded in N doped hollow carbon sphere(NHCS)for ORR.What's interesting is that the carbon microsphere is composed of two-dimensional(2D)nanoplate that could provide more exposed active sites.The usage of solid ZnO nanowires as zinc source is crucial to obtain this structure.The Fe3O4@NHCS-2 exhibits better catalytic activity and durability than the commercial PtC catalyst.Moreover,it further displays high-performance of Zn-air batteries as a cathode electrocatalyst with a high-power density of 133 mW·cm^-2 and high specific capacity of 701 mA·h·g^-1.The special hollow structure composed 2D nanoplate,high surface area,as well as synergistic effect between the high active Fe3O4 nanoparticles and N-doped matrix endows this outstanding catalytic activity.The work presented here can be easily extended to prepare metal compounds decorated carbon nanomaterials with special structure for a broad range of energy storage and conversion devices.

关键词： oxygen reduction reaction Zn-air battery Fe3O4 N doping hollow microsphere

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水培条件下火龙果根系形态和生理过程对供磷水平的响应

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热带作物学报 2024年第5期45卷 944-954页

作者：高翔杨永志李娟陈思如阮云泽高伟海南大学热带作物学院海南海口570228

磷是作物生长必需的大量元素,参与体内重要生理生化过程。火龙果是热带、亚热带地区重要经济作物,高额的果实磷含量和巨大的产量使得火龙果对磷的需求量极高。然而,火龙果磷吸收特性以及根系形态和生理过程与磷高效吸收之间有何关系尚... 详细信息

磷是作物生长必需的大量元素,参与体内重要生理生化过程。火龙果是热带、亚热带地区重要经济作物,高额的果实磷含量和巨大的产量使得火龙果对磷的需求量极高。然而,火龙果磷吸收特性以及根系形态和生理过程与磷高效吸收之间有何关系尚不清楚。本研究以国内主要火龙果品种软枝大红为研究对象,采用水培实验,设定0、0.01、0.1、0.5、1.0 mmol/L共5个不同磷浓度梯度,探究不同施磷浓度下火龙果根系形态和生理过程的变化,分析地上部磷以及其他营养元素的含量,阐明磷高效利用的根系形态和生理过程机制以及供磷对火龙果其他营养元素吸收的影响规律。研究结果表明,与对照相比,供磷并未影响火龙果地上部生物量的积累。火龙果枝条磷吸收量及磷浓度随着供磷浓度的升高而增大。0.1 mmol/L处理的总根长以及直径≤0.05 mm的细根数量显著高于其他处理;1.0 mmol/L处理的总根长中直径≥2 mm的粗根数量高于其他处理。0.01 mmol/L处理总有机酸含量最高,根系阳离子交换量(cation exchange capacity)含量较高;与对照相比,1.0 mmol/L处理下有机酸分泌速率降低,根系阳离子交换量(CEC)含量下降。其他营养元素吸收方面,母枝及一级侧枝中,铁元素的吸收浓度表现出随着施磷浓度的升高逐渐下降。二级侧枝中氮、钙、镁、锰、锌等元素均随着施磷浓度的升高逐渐下降,呈显著负相关关系。本研究表明,适度供磷(0.01 mmol/L或0.1 mmol/L)能够促进火龙果根系生长以及根系有机酸分泌和离子吸收能力,而过量供磷(1.0 mmol/L)会显著抑制火龙果根系生长,同时显著降低地上部枝条中、微量元素的吸收。因此合理施用磷肥,对火龙果自身发挥根系生物学潜力,为植株中、微量元素营养均衡起到关键作用。

关键词：磷火龙果根系形态根系生理养分吸收

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徐莲薇运用膏方从肝脾论治多囊卵巢综合征经验介绍

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新中医 2024年第2期56卷 214-217页

作者：陈思儒林悦徐莲薇(指导) 上海中医药大学附属龙华医院上海200032 上海市闵行区江川社区卫生服务中心上海201100

介绍徐莲薇教授运用膏方从肝脾论治多囊卵巢综合征的临床经验。徐莲薇教授认为多囊卵巢综合征的病机本质为本虚标实,应从肝、脾、肾论治,健脾填精养血以资其“本”,化痰疏肝消瘀以祛其“实”。冬令膏方依辨证化裁用药严谨,剂型易服方便... 详细信息

介绍徐莲薇教授运用膏方从肝脾论治多囊卵巢综合征的临床经验。徐莲薇教授认为多囊卵巢综合征的病机本质为本虚标实,应从肝、脾、肾论治,健脾填精养血以资其“本”,化痰疏肝消瘀以祛其“实”。冬令膏方依辨证化裁用药严谨,剂型易服方便可坚持,故临床可收良效。

关键词：多囊卵巢综合征从肝脾论治膏方徐莲薇

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基于数据挖掘探析中医药治疗绝经综合征的用药规律

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河北中医 2024年第1期46卷 137-141页

作者：赵靖昌高纤维陈思儒徐莲薇上海中医药大学附属龙华医院妇科上海200030

目的基于数据挖掘方法研究探讨中医药治疗绝经综合征(MPS)的用药规律,为中医药治疗MPS提供理论支持。方法通过检索中国知网(CNKI)、万方数据服务平台(Wanfang)、维普数据库(VIP)及中国生物医学文献数据库(CBM)中文数据库,PubMed及Web of... 详细信息

目的基于数据挖掘方法研究探讨中医药治疗绝经综合征(MPS)的用药规律,为中医药治疗MPS提供理论支持。方法通过检索中国知网(CNKI)、万方数据服务平台(Wanfang)、维普数据库(VIP)及中国生物医学文献数据库(CBM)中文数据库,PubMed及Web of Science英文数据库,收集中医药治疗MPS的相关文献。然后将筛选到的文献录入Microsoft Excel 2019表格,建立MPS方药数据库,并对所有药物进行频数、性味归经分析,采用chartcool进行绘图,运用SPSS molder 18.0软件进行关联分析获得核心药物组合,再使用SPSS Statistics 25.0软件对使用频次排名前30的中药进行组间联接的聚类分析。结果共筛选到符合标准文献1162篇,涉及处方1463首,共323味中药,其中方剂使用频次≥100首的药物有56味,使用频次最多的药物是白芍,药物四气以温为主,五味以甘、辛味为主,主要归肝、肾经二经,关联规则分析得到关联较强的核心药对是“女贞子-墨旱莲”,对处方使用频次排名前30的药物进行聚类分析共得到8类药物组合。结论MPS的中医药治疗以补益肝肾为主,“女贞子-墨旱莲”可能是中医药治疗MPS的核心药对,并随证配伍行气、安神、清热之药。

关键词：绝经综合征数据挖掘中药疗法

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和坤汤对去卵巢大鼠阴道子宫形态学及肝肾功能的影响

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上海中医药大学学报 2024年第3期38卷 57-65页

作者：吴盼晴丛超刘希昱陈思儒徐莲薇上海中医药大学附属龙华医院上海中医药大学龙华临床医学院上海200032

目的:探讨中药复方和坤汤对去卵巢大鼠阴道、子宫形态学的影响,并观察该方的肝、肾毒性。方法:将40只雌性SD大鼠随机分为4组:对照组、模型组、雌二醇(E_(2))组、和坤汤组,每组10只。除对照组外,其余大鼠采用去势手术构建围绝经期模型。... 详细信息

目的:探讨中药复方和坤汤对去卵巢大鼠阴道、子宫形态学的影响,并观察该方的肝、肾毒性。方法:将40只雌性SD大鼠随机分为4组:对照组、模型组、雌二醇(E_(2))组、和坤汤组,每组10只。除对照组外,其余大鼠采用去势手术构建围绝经期模型。术后第10天,对照组和模型组大鼠每天给予0.9%NaCl溶液灌胃,E_(2)组每天给予0.15 mg/kg E_(2)溶液灌胃,和坤汤组每天给予19.95 g/kg和坤汤颗粒剂混悬液灌胃,连续3个月。干预结束后处死大鼠,摘取阴道、子宫、肝脏、肾脏,计算脏器指数;苏木素-伊红(HE)染色观察各组大鼠的阴道、子宫、肝脏、肾脏形态学变化,并测量大鼠的阴道上皮厚度、上皮层数、固有层血管数量及子宫上皮厚度、内膜厚度、内膜腺腺体上皮高度和内膜腺个数;采用免疫组化方法检测大鼠阴道雌激素受体α(ERα)和ERβ表达;采用全自动生化分析仪检测大鼠的肝肾功能指标,包括丙氨酸转氨酶(ALT)、天冬氨酸转氨酶(AST)、超氧化物歧化酶(SOD)、血肌酐(Scr)、血尿素氮(BUN);采用酶联免疫吸附试验(ELISA)检测大鼠的血清E_(2)水平。结果:与模型组相比,E_(2)组、和坤汤组大鼠的阴道指数显著上升(P0.05)。结论:和坤汤能提高去卵巢大鼠的血清E_(2)水平,增加阴道雌激素受体表达,改善阴道萎缩,且作用温和,对子宫刺激较小、对肝肾功能无毒性作用。

关键词：和坤汤围绝经期阴道萎缩雌二醇肝肾毒性去卵巢大鼠

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