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Low-temperature graphitization of lignin via Co-assisted electrolysis in molten salt

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Green Energy & Environment 2024年第9期9卷 1449-1458页

作者： shijie Li Wei-Li Song xue Han Qingqing Cui Yan-li Zhu Shuqiang Jiao Institute of Advanced Structure Technology Beijing Institute of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology

The ever-growing energy demand and environmental issues have stimulated the development of sustainable energy ***,an efficient and environmentally friendly electrochemical transformation technology was proposed to prepare highly graphitized carbon materials from an abundant natural resource-lignin （LG）.The preparation process mainly includes pyrolytic carbonization of raw LG material and electrochemical conversion of amorphous carbon ***,with the assistance of Co catalyst,the graphitization degree of the products was significantly improved,in which the mechanism was the removal of heteroatoms in LG and the rearrangement of carbon atoms into graphite ***,tunable microstructures （nanoflakes） under catalytic effects could also be observed by controlling the electrolytic *** with the products CN1 （without catalyst） and CN5 （with 10%catalyst）,the specific surface area are 158.957 and202.246 m2g-1,*** used as the electrode material for lithium-ion batteries,CN5 delivered a competitive specific capacity of～350 m Ah g-1（0.5 C） compared with commercial *** strategy proposed in this work provides an effective way to extract value-added graphite materials from lignin and can be extended to the graphitization conversion of any other amorphous carbon precursor materials.

关键词： Lignin Graphitic carbon Electrochemical conversion Lithium-ion batteries

Nitrogen‑Doped Magnetic‑Dielectric‑Carbon Aerogel for High‑Efficiency Electromagnetic Wave Absorption

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Nano-Micro Letters 2024年第1期16卷 313-327页

作者： shijie Wang xue Zhang Shuyan Hao Jing Qiao Zhou Wang Lili Wu Jiurong Liu Fenglong Wang Key Laboratory for Liquid‑Solid Structural Evolution and Processing of Materials Ministry of Education Shandong UniversityJinan 250061People’s Republic of China School of Mechanical Engineering Shandong UniversityJinan 250061People’s Republic of China Shenzhen Research Institute of Shandong University Shenzhen 518057GuangdongPeople’s Republic of China

Carbonbased aerogels derived from biomass chitosan are encountering a flourishing moment in electromagnetic protection on account of lightweight,controllable fabrication and ***,developing a facile construction method of component design with carbon-based aerogels for high-efficiency electromagnetic wave absorption(EWA)materials with a broad effective absorption bandwidth(EAB)and strong absorption yet hits some ***,the nitrogen-doped magnetic-dielectric-carbon aerogel was obtained via ice template method followed by carbonization treatment,homogeneous and abundant nickel(Ni)and manganese oxide(MnO)particles in situ grew on the carbon *** to the optimization of impedance matching of dielectric/magnetic components to carbon aerogels,the nitrogen-doped magnetic-dielectric-carbon aerogel(Ni/MnO-CA)suggests a praiseworthy EWA performance,with an ultra-wide EAB of 7.36 GHz and a minimum reflection loss(RLmin)of−64.09 dB,while achieving a specific reflection loss of−253.32 dB mm−***,the aerogel reveals excellent radar stealth,infrared stealth,and thermal management ***,the high-performance,easy fabricated and multifunctional nickel/manganese oxide/carbon aerogels have broad application aspects for electromagnetic protection,electronic devices and aerospace.

关键词： Electromagnetic wave absorption Wide bandwidth Dielectric-magnetic synergy Multifunction

Genome Wide Characterization of CBL-CIPK Family Genes and Their Responsive Expression in Rosa chinensis

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Phyton-International Journal of Experimental Botany 2023年第2期92卷 349-368页

作者： Lunzeng Huang Hongsheng Gao Ning Jiang Yunhong Xu Zijian Gong Lele Chen shijie xue Xiaoyan Li Ruichao Liu Bei Li Hongxia Zhang Chunyan Yu Xiaotong Guo The Engineering Research Institute of Agriculture and Forestry Ludong UniversityYantai264025China College of Agriculture Ludong UniversityYantai264025China

Calcium(Ca^(2+))plays a pivotal role in various signal transduction *** B-like proteins(CBLs)are a unique group of Ca^(2+)sensors that decode Ca^(2+)signals by activating the plant specific protein kinase known as the CBL-interacting protein kinase(CIPK).In plants,the CBL-CIPK signaling network regulates multiple signals in response to different extracellular cues including abiotic ***,the genome wide annotation and expression patterns of CBLs and CIPKs in woody cutting flower plants are still *** this study,a total number of 7 CBLs(RcCBLs)and 17 CIPKs(RcCIPKs)genes,divided into four and five subfamilies,respectively,were identified from the rose *** RcCBLs possess a classic elongation factor-hand(EF-hand)domain,while all RcCIPKs possess both the classic kinase and NAF *** RcCBLs were predicted to be plasma membrane localized,whereas most RcCIPKs were predicted to be cytoplasmic *** analysis showed that one RcCBL gene pair and five RcCIPK gene pairs have gone through whole genome duplication *** cis-element prediction assays indicated that RcCBLs and RcCIPKs could function in different abiotic stress responses in rose *** quantitative real-time PCR analysis demonstrated that RcCBLs and RcCIPKs were expressed in different organs with overlapped but distinct patterns in response to various abiotic *** findings in this work will provide fundamental information and gene resources for further functional research on RcCBLs and RcCIPKs.

关键词： Calcineurin B-like proteins CBL-interacting protein kinase abiotic stress rose

Radical cascade cyclization for the green and simple synthesis of silylated indolo[2,1-a]isoquinoline derivatives via visible light-mediated Si–H bonds activation

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Chinese Chemical Letters 2024年第1期35卷 243-249页

作者： Zhenkai Lei Fei xue Bin Wang shijie Wang Yu Xia Yonghong Zhang Weiwei Jin Chenjiang Liu State Key Laboratory of Chemistry and Utilization of Carbon Based Energy Resources Key Laboratory of Oil and Gas Fine ChemicalsMinistry of Education&Xinjiang Uygur Autonomous RegionUrumqi Key Laboratory of Green Catalysis and Synthesis TechnologyCollege of ChemistryXinjiang UniversityUrumqi 830017China College of Future Technology Institute of Materia Medic1Xinjiang UniversityUrumqi 830017China Xinjiang Uygur Autonomous Region Product Quality Supervision and Inspection Institute Urumqi 830011China

Photocatalytic and photoinduced silyl radicals cascade cyclization procedures for the green and simple preparation of fused tetracyclic skeleton silylated indolo[2,1-a]isoquinoline-6(5H)-ones from 2-aryl-N-acryloyl indoles with hydrosilanes are *** photocatalytic reaction is carried out with 9,10-dicyanoanthracene(DCA)as an organophotocatalyst and 3-acetoxyquinuclidine as hydrogen atom transfer(HAT)catalyst at room temperature under metal-and oxidant-free *** keys to the success of photoredox-catalytic conversion include(1)the reductive quenching of DCA^(*)[E_(1/2)(*P/P^(-))=+1.97 V *** in MeCN]by 3-acetoxyquinuclidine(E_(p)=+1.22 V *** in MeCN),and(2)the thermodynamic feasibility of hydrogen atom abstraction from hydridic Si-H bond by electrophilic N^(+·).Particularly,the simple photoinduced cascade cyclization using(TMS)3SiH with 2-aryl-N-acryloyl indoles was exploited via an electron-donor-acceptor(EDA)complex under visible light irradiation.

关键词： Indolo[2,1-a]isoquinolines Silyl radicals Green photocatalytic Simple photoinduced Silylated Hydrogen atom transfer EDA complex

数字经济如何影响农业发展韧性——基于异质性与非线性的考量

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生态经济 2024年第7期40卷 111-118页

作者：薛选登许世杰河南科技大学商学院河南洛阳471023

数字经济作为技术变革与经济发展的动力源泉,借助数字技术推动生产率提升及经济结构优化,有效赋能农业发展韧性提升。基于2010—2020年中国13个粮食主产区省级面板数据,实证研究了数字经济与农业发展韧性之间的内在影响。研究发现:数字... 详细信息

数字经济作为技术变革与经济发展的动力源泉,借助数字技术推动生产率提升及经济结构优化,有效赋能农业发展韧性提升。基于2010—2020年中国13个粮食主产区省级面板数据,实证研究了数字经济与农业发展韧性之间的内在影响。研究发现:数字经济对农业发展韧性具有显著正向促进作用,即粮食主产区数字经济发展水平每提升1%,农业发展韧性提升0.231%;数字经济对农业发展韧性的影响存在区域异质性,东部地区农业发展韧性在数字经济发展中的获益能力强于中部和北部;数字经济对粮食主产区农业发展韧性存在“边际效应”递增的非线性影响,当数字经济水平高于门槛值0.540时,其对农业发展韧性的作用得到显著提升。对此,需加大数字基础设施和数字平台建设投资力度,推动数字经济与农业系统深度融合;提升农户数字技能与文化素养,加强“数字+农业”人才队伍建设;各主产区应结合自身资源禀赋,因地制宜发展数字经济。

关键词：粮食主产区数字经济农业发展韧性区域差异门槛效应

肠道菌群介导的不同饮食模式与高尿酸血症相关性研究进展

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食品科学 2024年第9期45卷 330-338页

作者：卢涵赵可新薛玉玲马新颖王世杰河北科技大学食品与生物学院河北石家庄050018 石家庄市人民医院河北石家庄050030 君乐宝乳业集团股份有限公司河北石家庄050221 河北一然生物科技股份有限公司河北石家庄050000

高尿酸血症(hyperuricemia,HUA)是一种由于尿酸生成与排泄失衡所导致的嘌呤代谢紊乱性疾病,严重时可导致痛风及肾功能损伤。目前我国HUA/痛风的患病率逐年提升,且患病人群越来越年轻化。近年来的研究表明HUA/痛风患者的肠道菌群与健康... 详细信息

高尿酸血症(hyperuricemia,HUA)是一种由于尿酸生成与排泄失衡所导致的嘌呤代谢紊乱性疾病,严重时可导致痛风及肾功能损伤。目前我国HUA/痛风的患病率逐年提升,且患病人群越来越年轻化。近年来的研究表明HUA/痛风患者的肠道菌群与健康人相比存在失调现象,而不同饮食模式可介导肠道菌群影响尿酸水平。本文详细阐述了HUA/痛风病人的肠道菌群特征以及肠道菌群对尿酸的代谢机制,为HUA/痛风的预防、提早诊断和辅助治疗提供理论基础;同时总结了不同饮食模式对尿酸水平影响的相关研究进展,旨在指导患者通过调整饮食模式有效预防并延缓HUA/痛风的发生。

关键词：高尿酸血症痛风肠道菌群饮食模式

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面向多复杂场景环境的敞车车号辨识研究

哈尔滨工程大学学报 2024年第6期45卷 1162-1169页

作者：薛峰于国丞李世杰凌烈鹏张峰峰陈峰炜中国铁道科学研究院集团有限公司铁道建筑研究所北京100081 苏州大学机电工程学院江苏苏州215021

针对现有敞车车号定位识别方法存在的环境适应性差、定位和识别精度低的问题,本文提出一种面向多种复杂环境下的敞车车号精准定位和识别的方法。搭建融合多尺度特征信息的敞车车号定位模型框架,在此基础上,融合多尺度金字塔特征进行深... 详细信息

针对现有敞车车号定位识别方法存在的环境适应性差、定位和识别精度低的问题,本文提出一种面向多种复杂环境下的敞车车号精准定位和识别的方法。搭建融合多尺度特征信息的敞车车号定位模型框架,在此基础上,融合多尺度金字塔特征进行深度可分离卷积的敞车车号特征提取网络设计。提出基于改进卷积循环神经网络的车号定位识别模型,主要针对识别网络模型结构进行设计。通过不同环境下采集的敞车车厢图片对本文提出的方法进行验证。结果表明:本文提出的车号定位方法的准确率为0.94,车号识别的准确率为0.97。

关键词：车号定位深度可分离卷积特征提取改进卷积循环神经网络特征金字塔字符识别铁路货运深度学习

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妊高征患者T细胞及体液免疫变化的初探

福建医药杂志 1999年第5期21卷 88-90页

作者：赵星赵红薛士杰何萍胡洁福建省医学科学研究所 350001 福建省妇幼保健院新生儿筛查中心 350001

目的　探讨妊高征患者 T细胞及体液免疫功能。方法　检测 3 2例不同严重度的妊高征患者淋转率、 T细胞亚群分类、血清免疫球蛋白、补体 C3 、 C4、 CIC、 CRP、 s IL - 2 R。结果 PIH患者 CRP阳性率升高 ;中重度患者 CD8+明显下降 ,CD4+... 详细信息

目的　探讨妊高征患者 T细胞及体液免疫功能。方法　检测 3 2例不同严重度的妊高征患者淋转率、 T细胞亚群分类、血清免疫球蛋白、补体 C3 、 C4、 CIC、 CRP、 s IL - 2 R。结果 PIH患者 CRP阳性率升高 ;中重度患者 CD8+明显下降 ,CD4+ / CD8+升高 ;血清 s IL- 2 R也升高 ;重度患者还有血清免疫球蛋白、补体显著下降 ,CIC值则升高。结论 PIH患者 CD8+ 细胞减少 ,抗原抗体反应增强 ,CIC升高 ,补体激活。 s IL - 2

关键词： T细胞体液免疫 sIL-2R 妊娠高血压

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复合暂堵剂暂堵技术

油气井测试 2018年第6期27卷 51-56页

作者：吴国涛薛世杰王永贤谭建勇张智勇能新科(西安)油气技术有限公司北京100176 北京斯迪莱铂油气技术有限公司北京100176

在页岩气、致密油等非常规油气资源的开发中,为有效提高水力裂缝的复杂程度,通过不同粒径暂堵剂的组合使用,在近井缝口或远场缝端可产生致密的暂堵剂封堵带,迫使流体转向,产生新的裂缝或者分支缝,从而达到增加裂缝复杂程度、提高油气产... 详细信息

在页岩气、致密油等非常规油气资源的开发中,为有效提高水力裂缝的复杂程度,通过不同粒径暂堵剂的组合使用,在近井缝口或远场缝端可产生致密的暂堵剂封堵带,迫使流体转向,产生新的裂缝或者分支缝,从而达到增加裂缝复杂程度、提高油气产量的目的。室内通过对暂堵剂不同尺寸不同比例分布下的渗透率降低程度进行测试,结果表明,近井缝口暂堵粗/中/细颗粒暂堵剂的比例以40%/25%/35%最优,远场缝端暂堵中/细颗粒暂堵剂的比例以35%/65%最优。该复合暂堵剂耐温40～150℃,耐压差40 MPa,能够根据地层温度和降解剂的加量调节降解时间,满足压后生产的需求。现场施工结果表明,复合暂堵工艺可以有效实现裂缝转向,加大裂缝复杂程度,增产效果良好。该工艺可以给暂堵转向压裂施工设计者或水平井重复压裂施工设计者提供借鉴和参考。

关键词：复合暂堵剂暂堵方式流体转向尺寸分布比例优化降解时间