A5003064040- Electron and X-Ray Spectroscopy Techniques
- Polymer crystallization and properties
- Liquid Crystal Research Advancements
- Food composition and properties
- Polysaccharides Composition and Applications
- Proteins in Food Systems
- Rheology and Fluid Dynamics Studies
- Force Microscopy Techniques and Applications
- Surfactants and Colloidal Systems
- Polymer Nanocomposites and Properties
- Material Properties and Processing
- Advanced Electron Microscopy Techniques and Applications
- Material Dynamics and Properties
- Alzheimer's disease research and treatments
- Organic Electronics and Photovoltaics
- Corrosion Behavior and Inhibition
- Advancements in Photolithography Techniques
- Microbial Metabolites in Food Biotechnology
- Conducting polymers and applications
- Ion-surface interactions and analysis
- Protein Structure and Dynamics
- Cultural Heritage Materials Analysis
- Supramolecular Self-Assembly in Materials
- Advanced Cellulose Research Studies
- Thin-Film Transistor Technologies
University of Cambridge
2009-2023
Cavendish Hospital
1993-2009
Harvard University
2006
Wageningen University & Research
2005
Bridge University
1997-2005
University of Edinburgh
2001
University of Surrey
2001
Unilever (France)
1998
Cornell University
1979-1983
Abstract Starch samples from different botanical species show few unifying features in either structure or function: for example both the amylose/amylopectin ratio and amylopectin chain length are found to vary extensively with botanic source. We have applied a detailed analysis data obtained small angle X‐ray scattering (SAXS) of variety starches which has shown existence constant structural periodicity. This finding suggests possibility general mechanism governing way starch is laid down species.
Bovine insulin has long been known to self-assemble in vitro into amyloid fibrils. We have observed a further higher-order self-association of the protein spherical structures, with diameters typically around 50 μm but ranging from 10 150 μm. In polarizing light microscope, these structures exhibit “Maltese-cross” extinction pattern typical spherulites. Spherical similar size distribution can be environmental scanning electron which also reveals presence significant amounts water structures....
Abstract Thin films of ten glassy polymers are bonded to copper grids and strained in tension produce crazes, which then examined the transmission electron microscope. The average craze fibril extension ratio λ for each polymer is determined from microdensitometer measurements mass thickness contrast crazes. found increase approximately linearly with chain contour length l e between entanglements, as melt elasticity entanglement molecular weight these polymers. These results analyzed by...
Uniaxially oriented samples of thermotropic random copolyesters hydroxybenzoic and hydroxynaphthoic acids, acid ethylene terephthalate, have been characterised in detail using wide-angle X-ray diffraction. The technique was used to measure the global chain orientation, case first polymer meridional scattering has analysed terms diffraction from an isolated straight chain. Optical microstructures were observed between crossed polars, with circularly polarized light plane-polarised no analyser...
The aim of this work was to characterize starch synthesis, composition, and granule structure in Arabidopsis leaves. First, the potential role starch-degrading enzymes during accumulation investigated. To discover whether simultaneous synthesis degradation occurred net accumulation, labeled by supplying 14CO2 intact, photosynthesizing plants. Release label from monitored a chase period air, using different light intensities vary rate synthesis. No release detected unless there chase. Similar...
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA Real-Time Simultaneous Small- and Wide-Angle X-ray Scattering Study of In-Situ Deformation Isotropic PolyethyleneMichael F. Butler, Athene M. Donald, Wim Bras, Geoffrey R. Mant, Gareth E. Derbyshire, Anthony J. RyanCite this: Macromolecules 1995, 28, 19, 6383–6393Publication Date (Print):September 1, 1995Publication History Published online1 May 2002Published inissue 1 September...
Abstract Quantitative transmission electron microscopy and optical is used to study craze initiation growth in thin films of high‐impact polystyrene (HIPS). Dilution the HIPS with unmodified reduces craze–craze interactions, permitting equilibrium micromechanics be studied. It found that length depends on size nucleating rubber particle, but not internal structure; no short crazes less than a particle diameter are observed. The long can adequately modelled by Dugdale model for grown from...
The power conversion efficiency in a conjugated polymer-functionalized fullerene bulk heterojunction organic photovoltaic (OPV) device is dependent both on the electronic properties of constituent materials and nanoscale morphology active semiconductor layer thin-film. Here we use situ ellipsometry grazing incidence X-ray scattering (GI-XS) to study molecular self-organization poly(3-hexylthiophene) (P3HT) [6,6]-phenyl C61-butyric acid methyl ester (PCBM) blend films real time, during drying...
This paper describes the construction of a phase diagram for as-cast state in organic photovoltaic system P3HT:PCBM. Evidence transition to phase-separated at PCBM concentrations greater than 70 wt % is seen both by DMTA and GIWAXS, glass temperatures blends single below are observed be raised compared pure polymer. Pure exhibit thermal 155 °C, an observation unreported date—offering insight into crystallites commonly device films. The liquid-crystal P3HT shown persist presence up 41 PCBM....
A chiral side-chain liquid-crystalline polymeric model for the structure and physical properties of starch was reviewed extended [1—6]. The lamellae in are considered terms three components: backbone, side-chains double helices. It is degree mobility these components, coupled with helix-coil transition, which gives its distinctive properties. used to help explain phenomena involved during hydration, gelatinisation, plasticisation, freezing, morphogenesis. new technique scanning microfocus...