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纤维素在新的非水有机溶剂体系中的均相衍生作用研究

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高分子通报 1990年第1期 53-61页

作者： B.Philipp W.Wagenknecht i.Nehls M.Schnabelrauch d.Klemm 林锡权民主德国科学院高分子化学研究所弗里德里希.席勒大学化学系中国科学院广州化学研究所

本文首先回顾了纤维素衍生化反应和非衍生化反应的有机溶剂,特别是偶极非质子含氧碱性溶剂体系,扼要介绍了纤维素在这两类溶剂中的均相酰化、烷基化和接枝共聚反应的现状。然后,着重叙述作者利用 N_2O_4/dMF 衍生化反应溶剂体系进行纤... 详细信息

本文首先回顾了纤维素衍生化反应和非衍生化反应的有机溶剂,特别是偶极非质子含氧碱性溶剂体系,扼要介绍了纤维素在这两类溶剂中的均相酰化、烷基化和接枝共聚反应的现状。然后,着重叙述作者利用 N_2O_4/dMF 衍生化反应溶剂体系进行纤维素酰化反应合成阴离子酯类(硫酸酯、磷酸酯)的最新研究成果。最后讨论了纤维素在新的有机溶剂体系中的均相衍生作用的优缺点,强调指出羟基位置的取代反应选择性控制的可能性和后处理步骤对决定产物性质的重要作用。

关键词：纤维素非水有机溶剂均相衍生

Electronic structure of heavy fermion system CePt_2in_7 from angle-resolved photoemission spectroscopy

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Chinese Physics B 2017年第7期26卷 352-362页

作者：沈兵俞理刘凯吕守鹏贾小文 E d Bauer J d Thompson 张艳王晨露胡成丁颖孙璇胡勇刘静高强赵林刘国东许祖彦陈创天卢仲毅周兴江 National Laboratory for Superconductivity Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences department of Physics and Beijing Key Laboratory of Opto-electronic Functional Materials & Micro-nano devices Renmin University of China Military Transportation University Los Alamos National Laboratory Technical institute of Physics and Chemistry Chinese Academy of Sciences Collaborative innovation Center of Quantum Matter

We have carried out high-resolution angle-resolved photoemission measurements on the Ce-based heavy fermion compound CePt2in7that exhibits stronger two-dimensional character than the prototypical heavy fermion system *** Fermi surface sheets and a complex band structure are clearly resolved. We have also performed detailed band structure calculations on CePt2in7. The good agreement found between our measurements and the calculations suggests that the band renormalization effect is rather weak in CePt2in7. A comparison of the common features of the electronic structure of CePt2in7and CeCoin5indicates that CeCoin5shows a much stronger band renormalization effect than CePt2in7. These results provide new information for understanding the heavy fermion behaviors and unconventional superconductivity in Ce-based heavy fermion systems.

关键词： heavy fermion ARPES electronic structure band calculation

Promote Competitive Neutrality to Facilitate China’s Economic development:Outlook,Policy Simulations,and Reform implementation-A Summary of the Annual SUFE Macroeconomic Report(2019-2020)

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Frontiers of Economics in China-Selected Publications from Chinese Universities 2020年第1期15卷 1-24页

作者： Kevin X.d.Huang Zixi Liu Guoqiang Tian department of Economics Vanderbilt UniversityNashvilleTN 37235USA institute for Advanced Research Shanghai University of Finance and EconomicsShanghai 200433China department of Economics Texas A&M UniversityCollege StationTX 77843USA

Twenty nineteen(2019)marked another year of lethargic growth in the Chinese economy amidst escalated internal and external ***,the country's macroeconomic landscape was overcast continuously by fallen consumption growth,plunged growth in manufacturing investment,rapid accumulation of household debt,risen income inequality,and the overhang of local government *** nation's external conditions did not fare any better,with drastically declined growth in imports and exports,continued trade tensions with the US,and weakened external *** on the iAR-CMM model,which takes account of both cyclical and secular factors,the baseline real GdP growth rate is projected to be 6.0%in 2020(5.9%using more reliable rather than the official data),with a downside *** scenario analyses and policy simulations are conducted,in addition to the benchmark forecast,to reflect the influences of various internal and external *** findings emanated from these analyses lead us to stress the importance and urgency of deepening reform to achieve competitive neutrality for China’s transformation into a phase with sustainable and high-quality development.

关键词： macroeconomic outlook alternative scenario policy simulation competitive neutrality reform systemic risk resource misallocation

Functional strategies and distribution of climbing plant communities in different vegetation patches in a subtropical dry forest, central Argentina

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Journal of Plant Ecology 2019年第1期12卷 23-33页

作者： María Cecilia Ferrero Sebastián R.Zeballos Juan i.Whitworth-Hulse Melisa A.Giorgis diego E.Gurvich instituto Multidisciplinario de Biología Vegetal CONICET-Universidad Nacional de CórdobaAv.Vélez Sársfield 1611CP X5016ZAACórdobaArgentina Facultad de Ciencias Exactas Físicas y NaturalesUniversidad Nacional de CórdobaAv.Vélez Sársfield 299CP X5000JJCCórdobaArgentina

Aims in the context of global change,the impacts of forest structure alter-ation on climbing plants in extra-tropical ecosystems are poorly *** also remains little explored,the functional strategies among climbing plant species and its relationship with the local-scale distribution of climbing plant ***,we aimed at three goals:(i)we studied how climbing plant community com-position responds to the modification of the original forest structure in a subtropical dry forest;(ii)we characterized climbing plant spe-cies according to functional traits related to the acquisition and use of resources;and(iii)we examined whether functional strategies at the community level are also responding to vegetation structure change,a much less addressed topic in the ecology of climbing *** The study was carried out in the Chaco forest of Córdoba Mountains,central *** selected 18 patches of‘native forests’,‘shrublands’and‘Ligustrum lucidum forests’.We counted and identified climbing plant individuals in each patch,including woody and herbaceous *** each spe-cies,we measured 10 functional traits:leaf area,leaf area ratio,leaf dry matter content,leaf tensile strength,specific leaf area,stem density,wood saturated water content,inter-node length,petiole length and plant *** compared climbing plant composition,richness and abundance among the three vegeta-tion ***,we assessed trends of functional variation of climbing plant species by performing a principal component ***,we investigated whether simple mean,weighted mean and Functional Richness index of principal component analysis(PCA)axes differed among the climbing plant communi-ties of the three vegetation *** Findings Multivariate analysis revealed that climbing plant composition of native forests significantly differed from that of shrublands and *** ***,*** forests had the lowest climb-ing plant species *** var

关键词： vines functional traits Chaco Serrano climbing plant species richness community weighted means

Radiation dermatitis wet healing:a concept analysis

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Frontiers of Nursing 2023年第3期10卷 301-305页

作者： Juan Xu Guang Yang Ronnell d dela Rosa Shandong Cancer Hospital and institute Shandong First Medical University and Shandong Academy of Medical SciencesJinanShandong 250117China School of Nursing Philippine Women’s UniversityMetro Manila 1004Philippines College of Nursing and Midwifery Bataan Peninsula State UniversityBalangaBataan 2100Philippines

Objective:To explore the concept of radiation dermatitis wet healing through a literature review and provide references for future treatment of patients with radiation skin ***:Related ar ticles selected from China National Knowledge infrastructure(CNKi),Wanfang database,Pub Med,Web of Science,Medline,and EBSCO were analyzed with Rodger’s concept ***:We identified the application status of wet healing in domestic and foreign literature,defined explicit attributes of the procedure,and clarified concepts related to wet healing of radiation skin injury to provide a reference for the management of radiation dermatitis with wet ***:Treatment of radiation dermatitis with wet healing is a unique *** this concept can contribute to its development in the future and can offer a theoretical basis for treatment of patients with radiation skin injury.

关键词： concept analysis radiation skin injury radiodermatitis skin damage wet healing

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用可变脉宽的CO2激光器对打孔的研究

应用激光 1980年第3期 17-23页

作者： d.C.hamilton i.R.Pashby 王蕙雅英国爱丁堡Ferranti有限公司英国布里斯托尔Rollls-Royce有限公司

横向激励的 CO;2;激光器已用来研究持续时间为40μ（?）的激光脉冲和金属靶之间的相互作用.已研究了机械加工设率对功率密度的依赖关系,并采用了高速照相术对不同脉冲持续时间的激光脉冲与金属靶之间的相互作用进行比较.冶金分析在软钢... 详细信息

横向激励的 CO;2;激光器已用来研究持续时间为40μ（?）的激光脉冲和金属靶之间的相互作用.已研究了机械加工设率对功率密度的依赖关系,并采用了高速照相术对不同脉冲持续时间的激光脉冲与金属靶之间的相互作用进行比较.冶金分析在软钢和铝样品中也显示出重要的结构效应.

关键词：激光器金属靶 CO2 软钢光激射器电子器件二氧化碳打孔激光脉冲脉冲能量脉冲辐照连续时间持续时间功率密度峰值功率长脉冲光学腔

intraparenchymal hepatic hematoma following endoscopic retrograde cholangiopancreatography: Risk factors and conservative approach in acute management

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Hepatobiliary & Pancreatic diseases international 2021年第3期20卷 293-295页

作者： Valeria d’Ovidio Giovanni Bruno Giulio Sodani Cristina Lucidi Marco Emilio Bazuro Gi Endoscopy Unit S.Eugenio HospitalRome 00100Italy Unit of Radiology S.Eugenio HospitalRome 00100Italy

Endoscopic retrograde cholangiopancreatography(ERCP) is an invasive procedure with a complication rate ranging from 4% to 10% [1]. While post-procedure pancreatitis is the most common risk, bleeding also deserves attention. The most common symptoms of post-procedure bleeding were abdominal pain(91.7%), anemia(43.8%), hypotension(29.2%) and fever(20.8%) [2,3].

关键词： retrograde bleeding anemia

An NSQiP survey of outcomes after resection of choledochal cysts in adults

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Hepatobiliary & Pancreatic diseases international 2021年第6期20卷 585-587页

作者： Joseph G.Brungardt Clay d.King Kurt P.Schropp department of Surgery The University of KansasKansas CityKS 66160USA

To the Editor:Choledochal cysts,now generally termed biliary cysts to include intrahepatic cysts,are a rare lesion with unknown incidence[1].These cysts more often affect females than males(4:1)[2].Often associated with the pediatric population of congenital etiology,some series have found adults equally affected[3].Classification of biliary cysts follows the Todani classification with six groups[4].

关键词： congenital pediatric etiology

Pasture-finishing of bison improves animal metabolic health and potential health-promoting compounds in meat

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Journal of Animal Science and Biotechnology 2023年第4期14卷 1759-1776页

作者： Stephan van Vliet Amanda d.Blair Lydia M.Hite Jennifer Cloward Robert E.Ward Carter Kruse Herman A.van Wietmarchsen Nick van Eekeren Scott L.Kronberg Frederick d.Provenza Center for Human Nutrition Studies Department of NutritionDieteticsand Food SciencesCollege of Agriculture and Applied SciencesUtah State UniversityLoganUT 84322USA department of Wildland Resources Utah State UniversityLoganUT 84332USA department of Animal Science South Dakota State UniversityBrookingsSD 57707USA Turner institute of Ecoagriculture BozemanMT 59718USA Louis Bolk institute Bunnik 3981AJthe Netherlands Northern Great Plains Research Laboratory USDA-Agricultural Research ServiceMandanND 58554USA

Background With rising concerns regarding the effects of red meat on human and environmental health,a growing number of livestock producers are exploring ways to improve production systems.A promising avenue includes agro-ecological practices such as rotational grazing of locally adapted ***,growing consumer interest in pasture-finished meat(i.e.,grass-fed)has raised questions about its nutritional ***,the goal of this study was to determine the impact of two common finishing systems in North American bison—pasture-finished or pen-finished on concentrates for 146 d—on metabolomic,lipidomic,and fatty acid profiles of striploins(*** lumborum).Results Six hundred and seventy-one(671)out of 1570 profiled compounds(43%)differed between pasture-and penfinished conditions(n=20 animals per group)(all,Pive to pasture-finished animals,the muscle of pen-finished animals displayed elevated glucose metabolites(~1.6-fold),triglycerides(~2-fold),markers of oxidative stress(~1.5-fold),and proteolysis(~1.2-fold).in contrast,pasture-finished animals displayed improved mitochondrial(~1.3-fold higher levels of various Krebs cycle metabolites)and carnitine metabolism(~3-fold higher levels of long-chain acyl carnitines)(all Pinishing also concentrated higher levels of phenolics(~2.3-fold),alpha-tocopherol(~5.8-fold),carotene(~2.0-fold),and very long-chain fatty acids(~1.3-fold)in their meat,while having lower levels of a common advanced lipoxidation(4-hydroxy-nonenal-glutathione;~2-fold)and glycation end-product(N6-carboxymethyllysine;~1.7-fold)(all Pin contrast,vitamins B5,B6,and C,gamma/beta-tocopherol,and three phenolics commonly found in alfalfa were~2.5-fold higher in pen-finished animals(all Ping some concentrate feeding,or grazing plants rich in those compounds,may be *** Pasture-finishing(i.e.,grass-fed)broadly improves bison metabolic health and accumulates additional po

关键词： Bison Grass-fed Meat Nutrition Omega-3 fats Pasture-raised Phytochemicals