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The First OCCCO Pentadentate Chelates:Osmium Mediated Stepwise Oxidations of Terminal Alkynes by Pyridine N-Oxide

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Chinese Journal of Chemistry 2020年第11期38卷 1273-1279页

作者： Jianfeng lin Qiannan Xu xinlei lin Yuhui Hua Dafa Chen Yonghong Ruan Hong Zhang Haiping Xia College of Chemistry and Chemical Engineering Xiamen UniversityXiamenFujian 361005China Shenzhen Grubbs Institute Department of ChemistryGuangdong Provincial Key Laboratory of CatalysisSouthern University of Science and TechnologyShenzhenGuangdong 518055China

of main observation and conclusion Oxygen atom transfer reactions between alkynes and heteroarene N-oxides are currently mediated by transition metal,such as gold,ruthenium or rhodium,but they have never been catalyzed by ***,we report stepwise oxidations of terminal alkynes mediated by an osmium carbolong complex,using pyridine N-oxide as the oxidant,yielding novel aldehyde-or carboxylic acid-coordinated osmapentalyne derivatives *** mechanism was illustrated by density functional theory calculations,providing a new route for oxygen atom transfer between heteroarene N-oxides and alkynes.

关键词： oxides yielding conclusion

Carbolong Chemistry: Planar CCCCX-Type (X = N, O, S) Pentadentate Chelates by Formal [3+1] Cycloadditions of Metalla-Azirines with Terminal Alkynes

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CCS Chemistry 2021年第2期3卷 758-763页

作者： Ming Luo Yuhui Hua Kaiyue Zhuo Lipeng Long xinlei lin Zhihong Deng Zhenyang lin Hong Zhang Dafa Chen Haiping Xia College of Chemistry and Chemical Engineering Xiamen UniversityXiamen Fujian Province Department of Chemistry The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong Department of Chemistry Southern University of Science and TechnologyShenzhenGuangdong Province

Three-membered unsaturated rings have been widely utilized in organic synthesis due to their inherent highly strained *** much research has been applied to ring-expansion reactions of such strained ring systems,pathways other than[3+2]cycloadditions have rarely been observed in their reactions with alkynes,and to date,no[3+1]cycloadditions of isolated three-membered unsaturated rings with alkynes have been *** we demonstrate an unprecedented[3+1]cycloaddition in which a fused metalla-azirine is used as a template to generate a series of planar CCCCX-type(X=N,O,S)pentadentate carbolong complexes 3–6.A series of substituted alkynes was tested for further exploration of the scope and mechanism for the[3+1]cycloaddition *** 3–6 represent rare examples of planar pentadentate complexes that assemble fourπ-conjugated fused rings by one bridgehead *** novel complexes are thermally stable in air and absorb ultraviolet,visible,and near-infrared light,and thus are potentially applicable in photoelectric devices and pharmaceuticals.

关键词： [3+1]cycloaddition reaction DFT calculations,metallacycles strained rings planar pentadentate chelates carbolong complexes

高速公路隧道二次衬砌混凝土逐窗入模技术研究

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施工技术 2018年第17期47卷 79-82页

作者：蔺鑫磊陈勇中交一公局第二工程有限公司江苏苏州215011

以杭绍台高速公路大砩口隧道为研究对象,通过隧道衬砌台车微改造,改变传统的隧道衬砌混凝土浇筑中频繁更换输送混凝土导管的方式,采用新型分流槽逐窗入模系统,因其操作简单、工作效率高、布料均匀等特点,解决了传统施工工艺中混凝土强... 详细信息

以杭绍台高速公路大砩口隧道为研究对象,通过隧道衬砌台车微改造,改变传统的隧道衬砌混凝土浇筑中频繁更换输送混凝土导管的方式,采用新型分流槽逐窗入模系统,因其操作简单、工作效率高、布料均匀等特点,解决了传统施工工艺中混凝土强度不足、冷缝、蜂窝麻面等隧道衬砌混凝土质量通病,同时也提高了隧道施工工效、降低了施工成本、整体提升了隧道二衬施工标准化水平。

关键词：隧道工程混凝土逐窗入模分流槽质量通病

Investigation on Yield Behavior of 7075‑T6 Aluminum Alloy at Elevated Temperatures

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Chinese Journal of Mechanical Engineering 2020年第5期33卷 225-236页

作者： Jianping lin Xingyu Bao Yong Hou Junying Min xinlei Qu Zhimin Tao Jiajie Chen School of Mechanical Engineering Tongji UniversityShanghai 201804China Shandong Nanshan Aluminum Co. LtdShandong 265706China Pan Asia Technical Automotive Center Shanghai 202106China

Aluminum alloys have drawn considerable attention in the area of automotive *** strength aluminum alloys are usually deformed at elevated temperatures due to their poor formability at room *** this work,the yield behavior of 7075 aluminum alloy in T6 temper(AA7075-T6)within the temperature ranging from 25°C to 230°C was *** and biaxial tensile tests with the aid of induction heating system were performed to determine the stress *** curves and the yield loci of AA7075-T6 at elevated temperatures,*** Mises,Hill48 and Yld2000-2d yield criteria were applied to predicting yield loci which were compared with experimentally measured yield loci of the *** show that yield stress corresponding to the same equivalent plastic strain decreases with increasing temperature within the investigated temperature range and the shape of yield loci evolves nearly *** experimental yield locus expands with an increase of equivalent plastic strain at the same temperature and the work hardening rate of AA7075-T6 exhibits obvious *** nonquadratic Yld2000-2d yield criterion describes the yield surfaces of AA7075-T6 more accurately than the quadratic von Mises and Hill48 yield criteria,and an exponent of 14 in the Yld2000-2d yield function gives the optimal predictions for the AA7075-T6 at all investigated temperatures.

关键词： Aluminum alloy Yield behavior Biaxial tensile test Warm condition

苏云金芽孢杆菌对不同虫类影响的meta分析

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职业与健康 2024年第13期40卷 1831-1836页

作者：李敏林心蕾王湘朱晓虹郑鲜李美丽长沙医学院医学检验学院湖南长沙417100 长沙医学院医学影像学院湖南长沙417100

目的苏云金芽孢杆菌对不同虫类影响的meta分析。方法计算机检索NIH数据库、PubMed数据库、中国期刊全文数据库(CNKI)、万方数据库(Wangfang)共4个国内外数据库,检索有关苏云金芽孢杆菌杀虫效果的文献。检索年限从1980年1月—2022年6月,... 详细信息

目的苏云金芽孢杆菌对不同虫类影响的meta分析。方法计算机检索NIH数据库、PubMed数据库、中国期刊全文数据库(CNKI)、万方数据库(Wangfang)共4个国内外数据库,检索有关苏云金芽孢杆菌杀虫效果的文献。检索年限从1980年1月—2022年6月,由3名研究者独立提取资料进行质量评价后采用Stata 16.0软件进行meta分析。结果共纳入25篇符合标准文献,包括20篇中文研究和5篇英文研究。Meta分析结果显示,(1)首先选取95%置信区间及WMD的数据进行异质性分析,半翅目(95%CI:1.83~3.38,Z=6.59,P50%),使用随机效应模型后合并效应差异有统计学意义。(2)选取昆虫死亡数作为结局指标,使用空白对照分析,棉铃虫(95%CI:4.72~7.30,Z=9.15,P<0.01,I^(2)=39.22%)、小菜蛾(95%CI:5.19~6.92,Z=13.78,P<0.01,I^(2)=46.26%)与蚊子(95%CI:3.79~5.03,Z=13.95,P=0.00,I^(2)=25.83%)三者统计学异质性较小(I^(2)<50%),采用固定效应模式分析结果,差异有统计学意义。结论苏云金芽孢杆菌对鳞翅目、双翅目、半翅目的昆虫有大小不等的杀伤作用,研究结果中对棉铃虫与小菜蛾的杀伤作用较为突出,具有研究价值。

关键词： Meta分析苏云金芽孢杆菌杀虫鳞翅目双翅目同翅目

Face off:a metabolic enzyme becomes a protein phosphatase

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Protein & Cell 2023年第7期14卷 476-478页

作者： Gaoxiang Zhao Qian lin Zhaoyuan Meng xinlei Sheng Leina Ma Yingming Zhao Department of Oncology Qingdao Cancer InstituteThe Affliated Hospital of Qingdao UniversityQingdao UniversityQingdao 266071China Ben May Department for Cancer Research The University of ChicagoChicagoIL 60637USA

Metabolism and metabolic enzymes are differentially regulated in normal and tumor cells,resulting in specific metabolic features of cancer cells to support their rapid proliferation and migration,and counteract metabolic and genotoxic stress during cancer progression(Wang et al.,2018).These metabolic features include the Warburg effect,which is reflected by high rates of glycolysis with elevated levels of lactic acid regardless of oxygen levels,a substantial increase of anabolism,and reprogrammed catabolism and redox homeostasis(Li et al.,2018;Wang et al.,2018).

关键词： elevated homeostasis

An optimized protocol for detecting guard cell specific gene expression by in situ RT-PCR in Brassica rapa

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Horticultural Plant Journal 2022年第3期8卷 311-318页

作者： Yingying Song xinlei Guo Jian Wu Jianli Liang Runmao lin Zifu Yan Xiaowu Wang College of Horticulture Henan Agricultural UniversityZhengzhou 450002China Institute of Vegetables and Flowers Chinese Academy of Agricultural SciencesBeijing 100081China

It is important to detect specific genes expressed in the guard cells,which control gas exchange and play key roles in response to drought and salt *** to the genetic transformation of Chinese cabbage(Brassica rapa)has not been well developed,in situ RT-PCR is a valuable option for detecting guard cell specific *** reported an optimized protocol of in situ RT-PCR by using an FAMA homologous gene Bra001929 in Brassica *** in Arabidopsis has been verified to be specially expressed in guard *** designed specific RT-PCR primers and optimized the protocol in terms of the(a)reverse transcription time,(b)blocking time,(c)antigen-antibody incubation time,and(d)washing *** approach provides a sensitive and effective in situ RT-PCR method for locating expression in the guard cells in Brassica ***,we proved the guard cell specific expression of Bra001929 in the epidermis indicating its’applicability as a marker gene for guard cells of Brassica rapa.

关键词： Brassica rapa In situ RT-PCR Gene expression Bra001929 Protocol

Characterization of terpenoids and norisoprenoids from base and retail Qingke Baijiu by GC×GC-TOFMS and multivariate statistical analysis

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Food Science and Human Wellness 2023年第1期12卷 192-199页

作者： xinlei Wang lin Zhu Xuebo Song Si Jing Fuping Zheng Mingquan Huang Shengbao Feng Luzhong La Beijing Advanced Innovation Center for Food Nutrition and Human Health Beijing Technology and Business UniversityBeijing 100048China Beijing Laboratory of Food Quality and Safety Beijing Technology and Business UniversityBeijing 100048China Key Laboratory of Brewing Molecular Engineering of China Light Industry Beijing Technology and Business UniversityBeijing 100048China Qinghai Huzhu Highland Barley Wine Co. Ltd.Huzhu 810500China

Qingke(highland barley)Baijiu is a special Chinese Baijiu which is mainly produced from Qinghai-Tibet *** the pine board is used as the bottom of the fermentation pit,we deduced that the terpenoids and norisoprenoids in pine board might be introduced into Qingke ***,the terpenoids and norisoprenoids in Qingke Baijiu were investigated by headspace solid phase microextraction(HS-SPME)combined with comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry(GC×GC-TOFMS).The results showed thatγ-terpinene(0.70-530.72μg/L),α-phellandrene(0.34-256.66μg/L),longicyclene(0-38.55μg/L),α-pinene(1.21-35.54μg/L)and limonene(0.93-23.69μg/L)were the top 5 terpenoids/norisoprenoids in Qingke *** was detected and reported for the first time in Baijiu,and the concentrations in Qingke Baijiu were 0.78μg/L(fresh)and 3.90μg/L(7 years old).According to the principal component analysis(PCA)plot,young,aged,and retail Qingke Baijiu could be differentiated *** change(FC)and t-tests analysis indicated thatβ-pinene,γ-terpinene,andα-selinene were the most different terpenoids/norisoprenoids between young and aged Qingke Baijiu,and longifolene was the most different terpenoids/norisoprenoids between base and retail Qingke *** terpenoids and norisoprenoids,such as(E)-β-ionone,isoborneol andβ-cyclocitral,could be potential markers indicating the ageing process of Qingke Baijiu.

关键词： Terpenoids Norisoprenoids Qingke Baijiu HS-SPME GC×GC-TOFMS PCA

城市工程渣土消纳处置及资源化利用途径探讨——以温州市为例

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环境卫生工程 2021年第2期29卷 1-9页

作者：詹良通郭淇萌吴林波陈云敏楼洪海张海东胡时进陈晓龙林新磊金国平浙江大学岩土工程研究所浙江杭州310058 软弱土与环境土工教育部重点实验室浙江杭州310058 申能环境科技有限公司浙江杭州311100 温州市资源化利用科技有限公司浙江温州325000 温州建设集团有限公司浙江温州325000 温州设计集团有限公司浙江温州325000

随着我国城市化快速发展,以工程渣土为主的各类建筑垃圾大量产生,全国许多城市面临“渣土围城”困境,城市管理者们亟须科学、合理的消纳处置及资源化利用途径解决渣土过剩问题。以东南沿海典型城市——温州为例,基于多源信息数据调研了... 详细信息

随着我国城市化快速发展,以工程渣土为主的各类建筑垃圾大量产生,全国许多城市面临“渣土围城”困境,城市管理者们亟须科学、合理的消纳处置及资源化利用途径解决渣土过剩问题。以东南沿海典型城市——温州为例,基于多源信息数据调研了工程渣土产生量、性质及处置现状,探讨了就近回填及堆坡造景、废弃矿山消纳及复垦土地、再生路基填料及待建道路消纳、渣土储备/再利用和围垦区洼地回填5种途径的可行性,并对不同途径消纳潜力及布局进行了介绍,提出了工程渣土分类开挖及直运,基于天-空-地监控技术的信息化管理平台,以及市域统筹、分类协同及特许经营管理机制等对策与建议。

关键词：工程渣土建筑垃圾消纳处置资源化利用管理机制温州