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Chemical Research in Chinese Universities 2024年第1期40卷 36-46页

作者： YANG Yinze zhang liyan ZHOU Leilei CHENG Haiyang ZHAO Fengyu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China School of Applied Chemistry and Engineering University of Science Technology of ChinaHefei 230026P.R.China Jilin Province Key Laboratory of Green Chemistry and Process Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022P.R.China

The reductive amination of furfural to furfurylamine is an important and still challenging topic in the field of biomass conversion. In this work, we prepared a series of Ni/Al_(2)O_(3)-LaO_(x) catalysts by co-precipitation method, the role of La played in promoting the catalytic performances of reductive amination furfural was discussed based on the changes in the electronic state of Ni species, acidity, and Ni particle size. The catalytic activity and the selectivity of furfurylamine are highly dependent on the surface properties and the structure of the catalyst. The addition of La promoted the amount of strong acidic sites and the H2dissociation and spillover on the surface, thus inducing the improvement of the catalytic activity and furfurylamine selectivity. The Ni/Al_(2)O_(3)-0.5LaO_(x)catalyst with suitable acid sites gave a high yield of furfurylamine (94.9%) under mild reaction conditions. Moreover, the catalyst could be recycled five times without significant loss in activity. The Ni/Al_(2)O_(3)-LaO_(x) catalyst is of great promise in the production of amines via reductive amination reaction.

关键词： Reductive amination Furfural Nickel catalyst Furfurylamine Lanthanum

Recent progress in functional metal-organic frameworks for bio-medical application

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Regenerative Biomaterials 2024年第2期3卷 37-54页

作者： Wenwen Chai Xiaochen Chen Jing Liu liyan zhang Chunyu Liu Li Li John Robert Honiball Haobo Pan Xu Cui Deping Wang School of Materials Science and Engineering Tongji UniversityShanghai 201804China Shenzhen Institute of Advanced Technology Chinese Academy of SciencesShenzhen 518055China Department of Orthopaedics&Traumatology School of Clinical MedicineLi Ka Shing Faculty of MedicineThe University of Hong KongHong KongChina

Metal-organic frameworks(MOFs)have a high specific surface area,adjustable pores and can be used to obtain functional porous materials with diverse and well-ordered structures through coordination and self-assembly,which has intrigued wide interest in a broad range of *** the arena of biomedical engineering,the functionalized modification of MOFs has produced drug carriers with excellent dispersion and functionalities such as target delivery and response release,with promising applications in bio-detection,disease therapy,tissue healing,and other *** review summa-rizes the present state of research on the functionalization of MOFs by physical binding or chemical cross-linking of small *** *** hvdrogels and evaluates the role and approach of MOFs functionalization in boosting the reactivity of *** this basis,research on the application of functionalized MOFs composites in biomedical engineering fields such as drug delivery,tissue repair,disease treatment,bio-detection and imaging is surveyed,and the development trend and application prospects of functionalized MOFs as an important new class of biomedical materials in the biomedical field are anticipated,which may provide some inspiration and reference for further development of MOF for bio-medical applications.

关键词： metal-organic frameworks porous functionalization tissue repair disease treatment

Helicobacter pylori and immunotherapy for gastrointestinal cancer

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The Innovation 2024年第2期5卷 51-60页

作者： Keren Jia Yang Chen Yi Xie Xicheng Wang Yajie Hu Yu Sun Yanshuo Cao liyan zhang Yakun Wang Zhenghang Wang Zhihao Lu Jian Li Xiaotian zhang Lin Shen Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of Gastrointestinal OncologyPeking University Cancer Hospital&InstituteBeijing 100142China Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Department of PathologyPeking University Cancer Hospital&InstituteBeijing 100142China

Helicobacter pylori infection is associated with the risk of gastrointestinal(GI)cancers;however,its impact on immunotherapy for GI cancers remains *** this study,we included 10,122 patients who underwent ^(13)C-urea breath *** 636 patients with Epstein-Barr virus–negative microsatellite-stable gastric cancer(GC)who were treated with anti-PD-1/PD-L1 therapy,***–positive patients exhibited significantly longer immune-related progression-free survival(irPFS)compared with ***–negative patients(6.97 months versus 5.03 months,p<0.001,hazard ratio[HR]0.76,95%confidence interval[CI]0.62–0.95,p=0.015).Moreover,the ***–positive group demonstrated a trend of 4 months longer median immune-related overall survival(irOS)than the ***–negative ***–positive GC displayed higher densities of PD-L1+cells and nonexhausted CD8+T cells,indicative of a“hot”tumor *** analysis revealed that ***–positive GC shared molecular characteristics similar to those of immunotherapy-sensitive ***,***–positive patients with DNA mismatch repair–deficient(dMMR)/microsatellite instability–high(MSI-H)colorectal adenocarcinoma and esophageal squamous cell carcinoma(ESCC)had shorter irPFS compared with ***–negative patients(16.13 months versus not reached,p=0.042,HR 2.26,95%CI 1.13–4.50,p=0.021 and 5.57 months versus 6.97 months,p=0.029,HR 1.59,95%CI 1.14–2.23,p=0.006,respectively).The difference in irOS between ***–positive and–negative patients had the same trend as that between dMMR/MSI-H colorectal adenocarcinoma and ESCC *** also identified a trend of shorter irPFS and irOS in ***–positive liver cancer and pancreatic cancer *** summary,our findings supported that *** infection is a beneficial factor for GC immunotherapy by shaping hot tumor ***,in dMMR/MSI-H colorectal adenocarcinoma and ESCC patients,*** adversely affects the efficacy of immunothera

关键词： immunotherapy gastrointestinal pylori

Analysis of Current Research and Future Development Trends of Applying Solar Energy in Street Lighting

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Journal of Electronic Research and Application 2024年第3期8卷 191-197页

作者： liyan zhang Qingying Zhou Yueming Zhan Hu Guo Chongqing Energy College Chongqing 402260China Chongqing No.94 Junior Middle School Chongqing 400080China

In the context of promoting green energy transition and addressing climate change globally,solar energy,as a clean and renewable energy source,has gradually become a hot topic for *** streetlight systems realize energy self-sufficiency and environment-friendly lighting by integrating photovoltaic power generation technology and efficient LED lighting *** comprehensively analyzing the current status of the application of solar streetlights at home and abroad,this paper discusses its technical advantages,market penetration,and challenges in its *** terms of technical characteristics,this paper focuses on analyzing the key technologies such as energy conversion efficiency and intelligent control systems of solar streetlights.

关键词： Solar streetlights Green energy Photovoltaic power generation LED lighting Intelligent control system

Exploration and Practice of“Four Integration and Four Innovation”Specialized and Creative Integration Talent Cultivation Mode:Taking Chongqing Energy Vocational College as an Example

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Journal of Contemporary Educational Research 2024年第4期8卷 296-303页

作者： liyan zhang Qingying Zhou Yueming Zhan Yu Xiao Mingli Chen Chongqing Energy College Chongqing 402260China Chongqing No.94 Junior Middle School Chongqing 400080China

With the release of China Education Modernization 2035,education modernization has become a national strategic *** this context,Chongqing Energy Vocational College is actively exploring the“four integration and four innovation”specialized and creative integration talent cultivation mode,aiming at cultivating high-quality talents with innovative spirit and practical *** paper analyzes the status quo and challenges of talent cultivation in higher vocational education,puts forward the main practices of innovation-driven,creation and research,cross-border integration,and innovative practice,and has achieved remarkable ***,it summarizes the experience revelation and provides a reference for other higher vocational colleges and universities.

关键词： Specialized and creative integration Talent cultivation Higher vocational education Innovation-driven Cross-border integration

非国有股东参与治理影响国有企业战略激进度吗?

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首都经济贸易大学学报 2024年第1期26卷 81-96页

作者：张莉艳陈琪山西财经大学工商管理学院山西太原030006

以2008—2020年国有上市制造企业为样本,手工收集非国有股东控制权数据构建非国有股东参与治理指标,分析股权和控制权非对等配置逻辑下非国有股东参与治理对国有企业战略激进度的影响,分析结果显示二者呈倒U型关系。因此,混合所有制改... 详细信息

以2008—2020年国有上市制造企业为样本,手工收集非国有股东控制权数据构建非国有股东参与治理指标,分析股权和控制权非对等配置逻辑下非国有股东参与治理对国有企业战略激进度的影响,分析结果显示二者呈倒U型关系。因此,混合所有制改革不仅仅是股权层面的混合,更要考虑非国有股东控制权比例的合理安排,才能更好地发挥不同所有制资本的协同治理效应。进一步的分析结果显示,高金字塔层级组国有企业、地方国有企业及低市场化程度地区国有企业中的上述关系更为明显。该结论对国有企业混合所有制改革中推动非国有资本融入内部治理机制有一定的参考价值。

关键词：混合所有制改革非国有股东治理战略激进度金字塔层级

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粤式豉油鸡传统烹煮过程中的质地及风味变化

现代食品科技 2024年第2期40卷 292-301页

作者：贺紫琼张立彦华南理工大学食品科学与工程学院广东广州510640

研究了典型粤式豉油鸡烹煮过程中鸡肉蒸煮损失、离心损失、氯化钠含量、pH值、质构、嫩度、微观结构和风味物质的变化,结果表明:煮制初期(5 min),鸡肉蒸煮损失和食盐渗入量迅速增加,分别为4.47%和0.22%,离心损失也达到最大值(32%);鸡皮... 详细信息

研究了典型粤式豉油鸡烹煮过程中鸡肉蒸煮损失、离心损失、氯化钠含量、pH值、质构、嫩度、微观结构和风味物质的变化,结果表明:煮制初期(5 min),鸡肉蒸煮损失和食盐渗入量迅速增加,分别为4.47%和0.22%,离心损失也达到最大值(32%);鸡皮、鸡肉色泽品质在热浸10 min后逐渐形成且稳定提升;烹制过程中,鸡肉硬度、弹性和咀嚼性在煮制10 min后明显增加(P<0.05),至热浸25 min后达到最高,分别为生鸡肉的1.65倍、1.54倍和4.35倍;鸡肉中肌纤维随加热进行不断收缩紧实,纤维结构变化明显;烹煮过程中鸡肉鲜味、甜味及苦味游离氨基酸总量、鸡肉特征香气物质含量逐渐上升,热浸25 min后上述风味物质含量显著增加(P<0.05);鸡肉的各项感官评分均逐渐上升,总体可接受度不断提高。至热浸25 min后鸡肉中总游离氨基酸含量为328.81 mg/100 g,鸡肉具有一定硬度及韧性,咀嚼感好,风味品质高,满足粤式豉油鸡的口感要求。

关键词：粤式豉油鸡传统烹煮质地风味

中国式现代化背景下农村精神养老的现实困境与路径选择

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重庆社会科学 2024年第1期 5-15页

作者：张丽艳秦鸣阳辽宁师范大学法学院辽宁大连116082

解决农村养老问题是实现乡村振兴和中华民族伟大复兴的必由之路。在开启中国式现代化新征程之际重视并发展农村精神养老,有利于促进新时代养老事业高质量发展,从而推动老年人精神世界的自由全面发展,符合实现全体人民共同富裕的中国式... 详细信息

解决农村养老问题是实现乡村振兴和中华民族伟大复兴的必由之路。在开启中国式现代化新征程之际重视并发展农村精神养老,有利于促进新时代养老事业高质量发展,从而推动老年人精神世界的自由全面发展,符合实现全体人民共同富裕的中国式现代化要求。目前我国农村精神养老面临家庭养老支撑力度减弱、老年个体精神自养能力不足、基层政府与社会组织的关注度不够等困境。应统筹多方力量构建完善的“他养”体系,推进实现人文关怀;秉持以人为本的发展理念,激发个体精神“自养”;激活乡村互助文化内生动力,赋能“互养”模式的可持续发展。

关键词：中国式现代化农村精神养老精神需求

基于结构光场辅助的面阵定位投影标示技术研发

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航空制造技术 2024年第1期67卷 131-138页

作者：叶凯玉周玲张辉张丽艳南京航空航天大学南京210016 江苏科技大学镇江212003

以一套数字光处理面阵投影装置和一个工业相机作为基本硬件平台,研发了三维定位标示原型系统i-Guider,阐述了i-Guider系统的工作原理和关键技术。在数字光处理投影仪中固化一组正弦相移条纹结构光图像,将投影仪作为逆成像装置,在结构光... 详细信息

以一套数字光处理面阵投影装置和一个工业相机作为基本硬件平台,研发了三维定位标示原型系统i-Guider,阐述了i-Guider系统的工作原理和关键技术。在数字光处理投影仪中固化一组正弦相移条纹结构光图像,将投影仪作为逆成像装置,在结构光场的辅助下利用一块平面标定板实现相机–投影仪内外参数的精确标定。对于三维数模上的曲线轮廓、操作说明等操作信息,提出一种现场自动生成标示信息定位投影图像的方法,并通过HDMI端口将现场生成的标示信息投影图像传递给面阵投影仪,实现操作信息在三维工件实物上的精确定位标示。以一个机身蒙皮试验件为对象,开展了蒙皮定位钻铆三维标示试验,结果表明,i-Guider系统定位投影标示精度在0.25 mm以内,且具有良好的三维定位标示效果。

关键词：机器视觉面阵投影点云测量定位标示配准

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铸造工艺对C19400铜合金带缺陷的影响

特种铸造及有色合金 2024年第1期44卷 84-88页

作者：赵健章丽艳向朝建中铜华中铜业有限公司黄石435004 中铝科学技术研究院有限公司北京102209

采用光学显微镜(OM)、场发射扫描电镜(FESEM)观察了C19400合金常规铸造与改进铸造方式制备铸锭及铜带缺陷形貌,通过工业CT V/Tome x m以20μm的扫描分辨率进行缺陷的3D检测分析。结果表明,通过采用双水冷环的改进铸造工艺方式,铸锭晶粒... 详细信息

采用光学显微镜(OM)、场发射扫描电镜(FESEM)观察了C19400合金常规铸造与改进铸造方式制备铸锭及铜带缺陷形貌,通过工业CT V/Tome x m以20μm的扫描分辨率进行缺陷的3D检测分析。结果表明,通过采用双水冷环的改进铸造工艺方式,铸锭晶粒细化明显,晶粒尺寸约为15 mm,柱状晶区占比较少,而等轴晶区占比较大;铸锭心部等轴晶区试样的工业CT 3D缺陷检测分析和微观组织观察表明,常规铸造方式铸锭中缺陷数量较多,分布呈现网络状,缺陷尺寸达0.599 mm;改进双水冷环铸造中,铸锭中缺陷数量明显较少,分布较为分散,缺陷尺寸约0.161 mm;铜带起泡、起皮和分层缺陷内部颗粒相及条纹和铸态缺陷内部颗粒相和条纹基本一致,该类铜带缺陷由铸锭中的缩松缺陷所致,需要减少铸锭中缩松缺陷。

关键词： C19400合金铸造工艺缺陷形貌