检索结果-南通市图书馆

Heterogeneous catalysts with programmable topologies generated by reticulation of organocatalysts into metal-organic frameworks:The case of squaramide

引用

Nano Research 2021年第2期14卷 458-465页

作者： Anna Broto-Ribas Claudia Vignatti Alicia Jimenez-Almarza Javier Luis-Barrera Zahra Dolatkhah Felipe Gandara Inhar Imaz Ruben Mas-Balleste Jose Aleman Daniel Maspoch Catalan Institute of Nanoscience and Nanotechnology(ICN2) CSIC and The Barcelona Institute of Science and Technology08193 BarcelonaSpain Inorganic Chemistry Department Modulo 7Universidad Autonoma de Madrid28049 MadridSpain Organic Chemistry Department Modulo 1Universidad Autonoma de Madrid28049 MadridSpain Materials Science Factory Instituto de Ciencia de Materiales de Madrid(ICMM)Consejo Superior de Investigaciones Cientificas(CSIC)Calle Sor Juana Ines de la Cruz328049 MadridSpain Institute for Advanced Research in Chemical Sciences(IAdChem) Campus Universidad Autonoma de Madrid28049 MadridSpain Institucio Catalana de Recerca i Estudis Avangats(ICREA) 08100 BarcelonaSpain

A well-established strategy to synthesize heterogeneous,metal-organic framework(MOF)catalysts that exhibit nanoconfinement effects,and specific pores with highly-localized catalytic sites,is to use organic linkers containing organocatalytic ***,we report that by combining this linker approach with reticular chemistry,and exploiting three-dimensioanl(3D)MOF-structural data from the Cambridge Structural Database,we have designed four heterogeneous MOF-based catalysts for standard organic *** programmable MOFs are isoreticular versions of pcu IRMOF-16,feu UiO-68 and pillared-pcu SNU-8X,the three most common topologies of MOFs built from the organic linker p.p'-terphenyldicarboxylic acid(tpdc).To synthesize the four squaramide-based MOFs,we designed and synthesized a linker,4,4’-((3,4-dioxocyclobut-1-ene-1,2-diyl)bis(azanedyil))dibenzoic acid(Sq_tpdc),which is identical in directionality and length to tpdc but which contains organocatalytic squaramide *** were chosen because their immobilization into a framework enhances its reactivity and stability while avoiding any self-quenching ***,the four MOFs share the same organocatalytic squaramide moiety,but confine it within distinct pore *** then evaluated these MOFs as heterogeneous H-bonding catalysts in organic transformations:a Friedel-Crafts alkylation and an epoxide *** of them exhibited good performance in both reactions but all showed distinct catalytic profiles that reflect their structural differences.

关键词： reticular chemistry metal-organic frameworks H-bond catalysis squaramide Friedel-Cratts epoxide ring-opening

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Individual and demographic responses of a marsh bird assemblage to habitat loss and subsequent restoration

引用

Avian Research 2020年第1期11卷 25-33页

作者： Ruben Moreno-Opo Monticola Ornithological Group Faculty of BiologyUniversity Autonoma of MadridMadrid 28049Spain Deputy Directorate on Biodiversity Ministry for the Ecological TransitionMadrid 28071Spain

Background: The alteration and loss of habitats are two of the main threats that biodiversity conservation is cur?rently facing up to. The present study describes the effects of a perturbation and restoration in a reedbed habitat on a bird assemblage. We studied the bird community of a wetland of central Spain between 1995 and 2009, during which time an anthropic perturbation altered the original structure of the habitat;subsequently, as a result of restoration works, the habitat returned to its original ***: We evaluated the effects on six population and physical parameters of the birds at three different phases of their life cycles(breeding, wintering and post?breeding migration seasons) before, during and after the habitat alteration. GLM was used to analyze the influence of three independent variables(year, perturbation phase and temperature).Results: The relative abundance and the species richness values decreased when habitat was altered, but then recovered as a result of the regeneration works. This pattern was the clearest amongst specialist species. Breeding success also declined during the perturbation phase and then increased;likewise, the sex ratio changed given that the proportion of male birds increased when habitat was altered. These results are discussed in relation to changes on availability of resources in altered habitats, to the adaptive mechanisms in the exploitation of ecological requirements and to the selection of optimum and sub?optimum habitats by generalist and specialist ***: Ecosystem restoration can favour the recovery of population indexes of specialist passerines, although it depends on the efficiency of the type of restoration activity performed and on the complexity of the habitat.

关键词： Habitat loss Land-use planning Marsh Restoration Ringing station Reedbed

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Plant adaptation to low phosphorus availability:Core signaling,crosstalks,and applied implications

引用

Molecular Plant 2022年第1期15卷 104-124页

作者： Javier Paz-Ares Maria Isabel Puga Monica Rojas-Triana Iris Martinez-Hevia Sergio Diaz Cesar Poza-Carrión Miguel Mi(n)ambres Antonio Leyva Department of Plant Molecular Genetics Centro Nacional de Biotecnología(CNB-CSIC)Darwin 3Campus Universidad Autónoma28049 MadridSpain Institute of Plant Biochemistry Institute of Synthetic Biology and CEPLASUniversity of Düsseldorf40225 DüsseldorfGermany

Phosphorus(P)is an essential nutrient for plant growth and *** preferentially absorb P as orthophosphate(Pi),an ion that displays low solubility and that is readily fixed in the soil,making P limita-tion a condition common to many soils and Pi fertilization an inefficient *** cope with Pi limitation,plants have evolved a series of developmental and physiological responses,collectively known as the Pi starvation rescue system(PSR),aimed to improve Pi acquisition and use efficiency(PUE)and protect from Pi-starvation-induced *** research has been carried out during the last 20 years to un-ravel the mechanisms underlying the control of the PSR in *** we review the results of this research effort that have led to the identification and characterization of several core Pi starvation signaling components,including sensors,transcription factors,microRNAs(miRNAs)and miRNA inhibitors,kinases,phosphatases,and components of the proteostasis *** also refer to recent results revealing the existence of intricate signaling interplays between Pi and other nutrients and antagonists,N,Fe,Zn,and As,that have changed the initial single-nutrient-centric view to a more integrated view of nutrient ***,we discuss advances toward improving PUE and future research priorities.

关键词： inositol pyrophosphate plant nutrient PHR1 transcription factor PUE(phosphorus acquisition and use efficiency) SPX sensor and STOP1 transcription factor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A reciprocal inhibitory module for Pi and iron signaling

引用

Molecular Plant 2022年第1期15卷 138-150页

作者： Meina Guo Wenyuan Ruan Yibo Zhang Yuxin Zhang Xueqing Wang Zhenhui Guo Long Wang Tian Zhou Javier Paz-Ares Keke Yi Key Laboratory of Plant Nutrition and Fertilizer Ministry of AgricultureInstitute of Agricultural Resources and Regional PlanningChinese Academy of Agricultural SciencesBeijing 100081China Department of Plant Molecular Genetics Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Cientificas28049 MadridSpain

Phosphorous(P)and iron(Fe),two essential nutrients for plant growth and development,are highly abundant elements in the earth's crust but often display low availability to *** to the ability to form insoluble complexes,the antagonistic interaction between P and Fe nutrition in plants has been noticed for ***,the underlying molecular mechanism modulating the signaling and homeostasis between them re-mains ***,we show that the possible iron sensors HRZs,the iron deficiency-induced E3 ligases,could interact with the central regulator of phosphate(Pi)signaling,PHR2,and prompt its ubiquitination at lysine residues K319 and K328,leading to its degradation in *** with this,the hrzs mutants dis-played a high Pi accumulation ***,we found that iron deficiency could attenuate Pi star-vation signaling by inducing the expression of HRZs,which in turn trigger PHR2 protein ***-estingly,on the other hand,rice PHRs could negatively regulate the expression of HRZs to modulate iron deficiency ***,PHR2 and HRZs form a reciprocal inhibitory module to coordinate Pi and iron signaling and homeostasis in *** together,our results uncover a molecular link between Pi and iron master regulators,which fine-tunes plant adaptation to Pi and iron availability in rice.

关键词： Phosphate(Pi) Iron(Fe) PHRs HRZs Pi/Fe signaling and homeostasis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Emerging drug design strategies in anti-influenza drug discovery

引用

Acta Pharmaceutica Sinica B 2023年第12期13卷 4715-4732页

作者： Chuanfeng Liu Lide Hu Guanyu Dong Ying Zhang Edeildo Ferreira da Silva-Jinior Xinyong Liu Luis Menendez-Arias Peng Zhan Department of Medicinal Chemistry Key Laboratory of Chemical Biology(Ministry of Education)School of Pharmaceutical SciencesShandong UniversityJinan 250012China Laboratory of Medicinal Chemistry Institute of Pharmaceutical SciencesFederal University of AlagoasMaceio 57072-970AlagoasBrazil Centro de Biologia Molecular“Severo Ochoa”(Consejo Superior de Investigaciones Cientificas&Universidad Autonoma de madrid) Madrid 28049Spain

Influenza is an acute respiratory infection caused by influenza viruses(IFV),According to the World Health Organization(WHO),seasonal IFV epidemics result in approximately 3-5 million cases of severe illness,leading to about half a million deaths worldwide,along with severe economic losses and social ***,frequent mutations in IFV lead to a certain lag in vaccine development as well as resistance to existing antiviral ***,it is of great importance to develop anti-IFV drugs with high efficiency against wild-type and resistant strains,needed in the fight against current and future outbreaks caused by different IFV *** this review,we summarize general strategies used for the discovery and development of antiviral agents targeting multiple IFV strains(including those resistant to available drugs).Structure-based drug design,mechanism-based drug design,multivalent interaction-based drug design and drug repurposing are amongst the most relevant strategies that provide a framework for the development of antiviral drugs targeting IFV.

关键词： Influenza virus Drug design strategies Anti-drugresistance High efficiency Broad spectrum

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Strain-induced band gap engineering in layered TiS3

引用

Nano Research 2018年第1期11卷 225-232页

作者： Robert Biele Eduardo Flores Jose Ramon Ares Carlos Sanchez Isabel J. Ferrer Gabino Rubio-Bollinger Andres Castellanos-Gomezs Roberto D'Agosta Nano-Bio Spectroscopy Group and European Theoretical Spectroscopy Facility (EFSF) Universidad del Pals Vasco 20018 San Sebastidn Spain Materials of Interest in Renewable Energies Group (MIRE Group) Dpto. de Fisica de Materiales Universidad Aut6noma de Madrid 28049 Madrid Spain Instituto de Ciencia de Materiales "Nicolds Cabrera" Campus de Cantoblanco 28049 Madrid Spain Dpto. de Ffsica de la Materia Condensada Condensed Matter Physics Center (IFIMAC) Universidad Aut6noma de Madrid Campus de Cantoblanco 28049 Madrid Spain Instituto de Ciencia de los Materiales de madrid (ICMM-CSIC) Cantoblanco 28049 Madrid Spain IKERBASQUE Basque Foundation for Science 48013 Bilbao Spain

By combining ab initio calculations and experiments, we demonstrate how the band gap of the transition metal trichalcogenide TiS3 can be modified by inducing tensile or compressive strain. In addition, using our calculations, we predicted that the material would exhibit a transition from a direct to an indirect band gap upon application of a compressive strain in the direction of easy electrical transport. The ability to control the band gap and its nature could have a significant impact on the use of TiS3 for optical applications. We go on to verify our prediction via optical absorption experiments that demonstrate a band gap increase of up to 9% （from 0.99 to 1.08 eV） upon application of tensile stress along the easy transport direction.

关键词： band gap engineering titanium trisulfide 2-D materials strain

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Electronic energy loss and ion velocity correlation effects in track production in swift-ion-irradiated LiNbO_(3):A quantitative assessment between structural damage morphology and energy deposition

引用

Journal of Materials Science & Technology 2022年第21期116卷 30-40页

作者： Xinqing Han Qing Huang Miguel L.Crespillo Eva Zarkadoula Yong Liu Xuelin Wang Peng Liu Institute of Frontier and Interdisciplinary Science and Key Laboratory of Particle Physics and Particle Irradiation(MOE) Shandong UniversityQingdao 266237China Shanghai Institute of Applied Physics Chinese Academy of Sciences(CAS)Shanghai 201800China Centro de Micro-Análisis de Materiales(CMAM) Universidad Autónoma de MadridMadrid E-28049Spain Materials Science&Technology Division Oak Ridge National LaboratoryOak RidgeTennessee 37831USA

The primary motivation for studying how irradiation modifies the structures and properties of solid materials involves the understanding of undesirable phenomena,including irradiation-induced degradation of components in nuclear reactors and space exploration,and beneficial applications,including material performance tailoring through ion beam modification and defect *** this work,the formation mechanism of latent tracks with different damage morphologies in LiNbO_(3)crystals under 0.09-6.17 Me V/u ion irradiation with an electronic energy loss from 2.6-13.2 ke V/nm is analyzed by experimental characterizations and numerical ***-induced damage is preliminarily evaluated via the prism coupling technique to analyze the correlation between the dark-mode spectra and energy loss profiles of irradiated *** the irradiation conditions of different ion velocities and electronic energy losses,different damage morphologies,from individual spherical defects to discontinuous and continuous tracks,are experimentally *** ion penetration process,the ion velocity determines the spatiotemporal distribution of deposited irradiation energy induced by electronic energy loss,meaning that the two essential factors including electronic energy loss and ion velocity coaffect the track *** inelastic thermal spike model is used to numerically calculate the spatiotemporal evolutions of energy deposition and the corresponding atomic temperature under different irradiation conditions,and a quantitative relationship is proposed by comparison with corresponding experimentally observed track damage *** obtained quantitative relationship between irradiation conditions and track damage provides deep insight and guidance for understanding the damage behavior of crystal materials in extreme radiation environments and selecting irradiation parameters,including ion species and energies,for ion beam technique application in atom

关键词： Latent track damage Thermal spike model Electronic energy loss Velocity effect Ion modification

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Optical trapping of optical nanoparticles:Fundamentals and applications

引用

Opto-Electronic Science 2023年第9期2卷 11-33页

作者： Fengchan Zhang Pablo Camarero Patricia Haro-González Lucía Labrador-Páez Daniel Jaque Nanomaterials for Bioimaging Group(nanoBIG) Departamento de Física de MaterialesFacultad de CienciasUniversidad Autónoma de Madrid28049 MadridSpain Instituto de materiales Nicolás Cabrera Universidad Autónoma de Madrid28049 MadridSpain Institute for Advanced Research in Chemical Sciences Facultad de CienciasUniversidad Autónoma de Madrid28049 MadridSpain Departamento de Química Física Facultad de Ciencias QuímicasUniversidad Complutense de Madrid28040 MadridSpain

Optical nanoparticles are nowadays one of the key elements of *** do not only allow optical imaging of a plethora of systems(from cells to microelectronics),but,in many cases,they also behave as highly sensitive remote *** recent years,it has been demonstrated the success of optical tweezers in isolating and manipulating individual optical *** has opened the door to high resolution single particle scanning and *** this quickly growing field,it is now necessary to sum up what has been achieved so far to identify the appropriate system and experimental set-up required for each *** this review article we summarize the most relevant results in the field of optical trapping of individual optical *** systematic bibliographic research,we identify the main families of optical nanoparticles in which optical trapping has been *** each case,the main advances and applications have been ***,we also include our critical opinion about the future of the field,identifying the challenges that we are facing.

关键词： optical trapping optical nanoparticle single particle spectroscopy single particle sensor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

p38γand p38δas biomarkers in the interplay of colon cancer and inflammatory bowel diseases

引用

Cancer Communications 2022年第9期42卷 897-901页

作者： Pilar Fajardo Maria Taskova Miguel A.Martín-Serrano Jonas Hansen Sofie Slott Anna K.Jakobsen Marie-Louise Wibom Beñat Salegi Alberto Muñoz Antonio Barbachano Arpita Sharma John Mark Gubatan Aida Habtezion Juan J.Sanz-Ezquerro Kira Astakhova Ana Cuenda Department of Immunology and Oncology National Centre of Biotechnology/Consejo Superior de Investigaciones CientíficasDarwin 3Madrid 28049Spain PhD Programme in Molecular Bioscience Doctoral SchoolUniversidad Autónoma de MadridMadrid 28049Spain Department of Chemistry Technical University of Denmark2800 Kongens LyngbyDenmark Adolphe Merkle Institute University of FribourgChemin des Verdiers 41700 FribourgSwitzerland Stanford School of Medicine StanfordCA 94305USA Instituto de Investigaciones Biomédicas“Alberto Sols” Consejo Superior de Investigaciones CientíficasUniversidad Autónoma de MadridMadrid 28029Spain Centro de Investigación Biomédica en Red-Cáncer Instituto de Salud Carlos IIIMadrid 28029Spain Instituto de Investigación Sanitaria del Hospital Universitario La Paz Madrid 28029Spain Department of Medicine Division of Gastroenterology and HepatologyStanford University School of MedicineStanfordCA 94305USA Department of Molecular and Cellular Biology Centro Nacional de Biotecnología/Consejo Superior de Investigaciones CientíficasDarwin 3Madrid 28049Spain

Dear Editor,Colorectal cancer(CRC)is the second leading cause of cancer death according to the World Health *** with inflammatory bowel disease(IBD),ulcerative colitis(UC)or Crohn’s disease(CD)are at increased risk of developing colitis-associated CRC(CAC)[1];however,our understanding of the inflammationcancer interplay at the molecular level is still limited.

关键词： inflammatory death p38 CRC

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Synthesis of a pair of novel receptors and their properties of enantioselective recognition for amino acid zwitterions

引用

Chinese Journal of Chemistry 1999年第5期17卷 508-515,427页

作者：陆国元刘芳何卫江王志林胡宏纹 Department of Chemistry Nanjing University Nanjing Jiangsu 210)93 China Departament de Quimica Organica Universidad Autonoma de Madrid Madrid 28049 Spain

A pair of artificial enantiotopic receptors la and lb composed of (S,S) or (R,R) chiral bicyclic guanidinium, azacrown ether and (t-butyldiphenylsilyloxy) methyl group for amino acid zwitterions have been synthesized. The liquid-liquid competition experiments and 1 H NMR studies indicate that the receptor 1a with (S, S) configuration and 1b with (R,R) configuration selectively recognize L- and D-aromatic amino acids & respectively.

关键词： Enantioselective Recognition amino acid zwitterions artificial receptor

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：