A Diels–Alder Approach to Graphene Nanoribbon Precursors
Key words graphene nanoribbons - cyclodehydro-genation - Diels–Alder reaction - near-infrared absorption
Materials Literature
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Olefin Metathesis with Ruthenium–Carbene Supported on Iron Oxide
Key words carbenes - iron oxide - olefin metathesis - ruthenium
Having the Gall to Synthesize Conjugated Polymers Containing Gallium Atoms
Key words gallium - conjugated polymers - cross-coupling
Utilização de concentrados de eva-argila organofílica obtidos por spray drying, drais e extrusão no desenvolvimento de nanocompósitos poliméricos
Não recebi financiamento
Electropolymerization Furnishes Conducting Polyfuran Films
Key words furans - oligomers - conducting polymers - electropoly-merization
PB&J: Phosphorus and Boron at the Junction of Two π-Systems
Key words electrocyclization - ring closure - ring opening
PENGARUH KONFIGURASI IHX TERHADAP EFISIENSI DAN EFEKTIVITAS SISTEM KOGENERASI REAKTOR VHTR
Very High Temperature Reactor (VHTR) atau reaktor bertemperatursangat tinggi adalah salah satu jenis reaktor Generasi IV yang didesain dengan konsep kogenerasi untukpembangkit listrik dan produksi hidrogen. VHTR berpendingin helium dengan temperatur outlet kuranglebih 1000 oC dan bertekanan 7 MPa. Komponen konversi en…
Foam flows in 2D porous media: intermittency and bubble fragmentation
International audience
Semi-conducteurs organiques [pi]-conjugués pour l'élaboration de dispositifs photovoltaïques hybrides solides à colorant
The aim ot this work has been to prepare new hole transporting molecular glasses based on carbazole moieties as an alternative to spiro-OMeTAD (standard material) in solid state dye sentitized solar cells (ssDSSC). We have synthesized several 3, 6, 9 substituted carbazole derivatives and have established their physica…
Graft Copolymerization of Acrylamide and Methylmethacrylate onto Cellulose Fibres: Influence of Initiator in Gel Formation
Acrylamide and methylmethacrylate monomers were grafted onto bleached cellulosic fibres using K 2 S 2 O 8 and a redox system of K 2 S 2 O 8 -Na 2 S 2 O 5 as initiators at room temperature while varying time, monomer concentration and concentration of initiator. The study have shown that percentage grafting increases a…
The Copper(I)-catalyzed Azide–Alkyne Cycloaddition: A Modular Approach to Synthesis and Single-Molecule Spectroscopy Investigation into Heterogeneous Catalysis
Click chemistry is a molecular synthesis strategy based on reliable, highly selective reactions with thermodynamic driving forces typically in excess of 20 kcal mol-1. The 1,3-dipolar cycloaddition of azides and alkynes developed by Rolf Huisgen saw dramatic rate acceleration using Cu(I) as a catalyst in 2002 reports…
Phoenix: A Reactor Burnup Code With Uncertainty Quantification
Codes for accurately simulating the core composition changes for nuclear reactors have developed as computing technology developed. The desire to understand neutronics, material compositions, and reactor parameters as a function of time has been, and will continue to be, an area of great interest in nuclear research.…
Veränderung der Messerschärfe beim Feldhäcksler und deren Auswirkung auf das Messerschleifen
Das Schleifen der Feldhäckslermesser schafft eine entsprechende Schärfe, die einen niedrigen Kraftstoffverbrauch und eine gute Häckselqualität zur Folge hat. Da innerhalb der letzten Jahre eine kontinuierliche Weiterentwicklung der Messerbeschichtung stattfand, sind die gegenwärtig üblichen und seit Jahren angewandten…
Estimation of Influence of Individual Design and Technological Peculiarities on the Passive Safety of Shift Bus Bodies Made of Multilayer Panels
The paper presents the results of investigation of influence of individual design and technological peculiarities on the passive safety of shift bus bodies made of multilayer panels.
Click Reaction Using Polymer-Supported CuI–Cryptand-22
Key words 1,2,3-triazoles - sodium azide - terminal alkynes - polystyrene resin
The influence of hyperplasticizer on concrete
The paper presents the possibility of modeling of concrete properties in fresh and/or hardened state by applying hyperplasticizers type admixtures, based on a modified polycarboxyl ether polymer. It provides an overview of its application in their own and other experimental surveys with the experiences of the amount a…
Facteurs favorisant les mycoses, conseils à l'officine et place de l'aromathérapie dans le traitement des mycoses superficielles
La frequence, la diversite des agents responsables et l'emergence de nouveaux facteurs favorisant les mycoses n'ont cesse de croitre ces dernieres annees. Le pharmacien ayant un role majeur de conseil dans l'eviction de ces facteurs favorisants et dans la delivrance d'antifongiques azoles, la premiere partie de cette…
Verschleißreduktion durch verbesserte Stahlqualität beim Pflug
In der Bodenbearbeitung können höhere Flächenleistungen durch größere Arbeitsbreiten, höhere Geschwindigkeiten oder aber durch die Verlängerung der Standzeiten erreicht werden. Eine Möglichkeit zur Verlängerung der Standzeiten besteht darin, die Werkzeuge mit zusätzlichen Verschleißschichten zu versehen. Dies wurde fü…
Thermochemische Vergasung von Biomasse
Die verstärkte Nutzung von Biomasse zur Bereitstellung von Energie und Ausgangsstoffen für die chemische Industrie wird derzeit diskutiert. Die Prozesse der thermochemischen Umsetzung spielen hierbei eine Schlüsselrolle. In diesem Beitrag werden anhand einer Versuchsbeschreibung zu einer Anlage zur thermochemischen Ga…
Análise numérica da pressão de colapso de anéis cilíndricos compostos com carregamento de pressão externa
A pressão de colapso de modelos numéricos de dutos constituídos de metal-compósito é avaliada através da utilização de anéis cilíndricos de comprimento unitário. Os modelos foram desenvolvidos e analisados utilizando o método dos Elementos Finitos, através do programa Solidworks Simulation Premium (2012). Os anéis são…