Sir Harry Work Melville, K.C.B. 27 April 1908 – 14 June 2000

2002 ◽  
Vol 48 ◽  
pp. 289-308
Author(s):  
John C. Bevington ◽  
Brian G. Gowenlock
Keyword(s):  
Analytical Techniques ◽  
Scientific Meeting ◽  
Heterogeneous Reactions ◽  
Research Strategies ◽  
Chemical Research ◽  
Academic Administration ◽  
Personal Involvement ◽  
Polymer Properties ◽  
Wide Range ◽  
The University

Sir Harry Melville was a physical chemist with an international reputation for his studies of gas-phase and heterogeneous reactions, polymerizations and polymer properties; much of this work was characterized by the development of analytical techniques that exploited a very wide range of physical properties. His career changed direction at the age of 48 from immediate personal involvement in the direction of research to the development of national research strategies, followed later by academic administration as a university Principal. His interests in chemical research remained active throughout his long life. For J.C.B., acquaintance with Melville began during a study of phosphorus as an incendiary agent and reading some of his published papers; there was later (in 1948) appointment to the staff at the University of Birmingham and membership of the High Polymer Research Group. B.G.G. heard him lecture at a scientific meeting in 1945, met him as external PhD examiner in 1949 and joined his department at Birmingham in 1955.

scholarly journals Synthesis, Characterization and Mechanical Properties of Nanocomposites Based on Novel Carbon Nanowires and Polystyrene

2020 ◽  
Vol 10 (17) ◽  
pp. 5737
Author(s):  
Vasilis Kostas ◽  
Maria Baikousi ◽  
Nektaria-Marianthi Barkoula ◽  
Aris Giannakas ◽  
Antonios Kouloumpis ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Analytical Techniques ◽  
Polymer Nanocomposite ◽  
Precipitation Method ◽  
Templating Method ◽  
Polymer Properties ◽  
Wide Range ◽  
First Time ◽  
Range Of Values ◽  
Carbon Nanowires

Carbon into polymer nanocomposite is so far a common additive for the enhancement of the polymer properties. The properties of the polymer, such as thermal, and especially its mechanical properties, are improved by the homogeneously dispersed carbon nanoparticles on the polymer matrix. In this study, carbon wires in nano dimensions are, for the very first time, synthesized via the hard templating method from the silicate matrix MCM-41, and used as nano additives of polystyrene. The carbon nanowires were chemically oxidized, and further modified by attaching octadecylamine molecules, for the development of organic functionalities onto carbon nanowires surface. The nanocomposite materials of polystyrene with the modified carbon nanowires were prepared by a solution-precipitation method at three nano additive to polymer loadings (1, 3 and 5 wt%). The as-derived nanocomposites were studied with a combination of characterization and analytical techniques. The results showed that the thermal and mechanical properties of the polystyrene nanocomposites gradually improved while increasing nano-additive loading until 3 wt%. More specifically, the 3 wt% loading sample showed the best mechanical properties, while the 5 wt% sample was difficult to achieve satisfactory dispersion of carbon nanowires and consequently has a wide range of values.

Up Close: Physical Chemistry Cluster of the University of Amsterdam

MRS Bulletin ◽  
1990 ◽  
Vol 15 (5) ◽  
pp. 31-34
Author(s):  
Job Elders
Keyword(s):  
Physical Chemistry ◽  
Excited States ◽  
Spectroscopic Properties ◽  
Chemical Research ◽  
Pivot Point ◽  
Laser Technology ◽  
Research Activities ◽  
Wide Range ◽  
Information Center ◽  
The University

The Physical Chemistry Cluster (PCC), located in the Department of Physical Chemistry, University of Amsterdam, the Netherlands is a cooperative entity which directs a wide range of in-depth research. Extensive collaboration within the PCC offers a broad base of expertise to every participant. The PCC is situated in the inspiring environment of the Van't Hoff Laboratory, named for the Dutch chemist who received the first Nobel prize awarded for chemistry in 1901 for his research on valence-directions and stereochemistry of the carbon atom.The PCC is composed of a number of different bodies, with the Department of Physical Chemistry serving as the pivot point. Figure 1 shows a diagram of the PCC organization which includes the University of Amsterdam (UvA); the foundation, Chemical Research Netherlands (SON); Institute of Mass Spectrometry (IMS); the Interaction of Matter with Photons group (IMF); Faculty of Physics (UvA); Laser Application and Information Center Amsterdam (LAICA); the LAICA Laser Technology Ventures, Ltd.; and the Laser Lease Center.The Physical Chemistry Cluster finds its roots at the Laboratory of Physical Chemistry of the University of Amsterdam. The Laboratory for Physical Chemistry has an academie staff of about 18 members who cooperate with the faculty of physics of the University of Amsterdam. PCC research activities cover a broad field of physical chemistry. Here, researchers study the interaction of matter and photons to obtain information on spectroscopic properties and dynamics of excited states of isolated or clustered molecules in the gas or condensed phase.

scholarly journals Obituary notices of fellows deceased

1928 ◽  
Vol 118 (780) ◽  
Keyword(s):  
Primary School ◽  
Leisure Time ◽  
Research Worker ◽  
Chemical Research ◽  
Applied Chemistry ◽  
Rapid Succession ◽  
Short Period ◽  
Wide Range ◽  
The University ◽  
Similar Organization

The earlier years of Albin Haller were spent in his native village of Felleringen, not far from Mulhouse, where he was born on March 7th, 1849. He was the eldest son of a family of eleven, and at the age of 14, after he had attended the primary school at Wesserling, he was apprenticed as a carpenter in his father's workshop. However, by a lucky chance, he happened, two years later, to make the acquaintance of a pharmacist, M. Achille Gault, who took him into his laboratory and gave him his first lessons in chemistry. For three years M. Gault, who was quick to recognize the marked ability of his pupil, devoted his leisure time to the training of Haller, and ultimately sent him to his brother, M. Leon Gault, of Colmar, to whom he became assistant. Early in the Franco-Prussian was Haller volunteered for service, joining at Belfort in 1870, but after the disastrous year of 1871 he elected to remain in France and rejoined M. Gault at Nancy, where he assisted in the establishment of a pharmacy, and continued to study for his pharmaceutical examinations under the direction of his master. In 1872 the University of Strasbourg was established at Nancy, and Haller became in rapid succession "aide-préparateur," "préparateur" and "chef de travaux" in the Ecole Supérieure de Pharmacie. In 1879 he obtained the "doctorat ès sciences," and in 1885 was appointed a professor in the Faculty of Science of the University. By this time his keen insight and great manipulative skill as a research worker, and his marked ability as an administrator and inspiring lecturer, had become generally recognized, so that in 1899 he was called to Paris as successor to Friedel and Wurtz at the Sorbonne. From this time onward, up to within a very short period of his death, at the age of 76, Haller continued to publish at frequent intervals a great number of original memoirs, amounting in all to 250, covering a wide range of chemical research. His great organizing ability enabled him to establish the Institut Chimique of the University of Nancy in 1890, and subsequently a similar organization devoted to the study of physical and electro-chemistry. He was chiefly responsible for the development of the teaching of applied chemistry in France, and in 1908 succeeded Berthelot as President of the Commission on Explosives.

Recent Applications of High Resolution Electron Microscopy to Crystalline Arrays of Virus Particles

1978 ◽  
Vol 36 (3) ◽  
pp. 470-482 ◽  
Author(s):  
R.W. Horne
Keyword(s):  
Electron Microscopy ◽  
Image Processing ◽  
Analytical Techniques ◽  
Staining Technique ◽  
High Resolution Electron Microscopy ◽  
Optical Diffraction ◽  
Full Potential ◽  
Virus Particles ◽  
Resolution Electron ◽  
Wide Range

The technique of surrounding virus particles with a neutralised electron dense stain was described at the Fourth International Congress on Electron Microscopy, Berlin 1958 (see Home & Brenner, 1960, p. 625). For many years the negative staining technique in one form or another, has been applied to a wide range of biological materials. However, the full potential of the method has only recently been explored following the development and applications of optical diffraction and computer image analytical techniques to electron micrographs (cf. De Hosier & Klug, 1968; Markham 1968; Crowther et al., 1970; Home & Markham, 1973; Klug & Berger, 1974; Crowther & Klug, 1975). These image processing procedures have allowed a more precise and quantitative approach to be made concerning the interpretation, measurement and reconstruction of repeating features in certain biological systems.

TEM study of boron additions to cobalt aluminide

1988 ◽  
Vol 46 ◽  
pp. 546-547
Author(s):  
Gerald B. Feldewerth
Keyword(s):  
High Temperature ◽  
Turbine Engines ◽  
Major Drawback ◽  
University Of Missouri ◽  
Specific Strength ◽  
Aerospace Applications ◽  
Wide Range ◽  
Ordered Alloys ◽  
The University ◽  
Very High

In recent years an increasing emphasis has been placed on the study of high temperature intermetallic compounds for possible aerospace applications. One group of interest is the B2 aiuminides. This group of intermetaliics has a very high melting temperature, good high temperature, and excellent specific strength. These qualities make it a candidate for applications such as turbine engines. The B2 aiuminides exist over a wide range of compositions and also have a large solubility for third element substitutional additions, which may allow alloying additions to overcome their major drawback, their brittle nature.One B2 aluminide currently being studied is cobalt aluminide. Optical microscopy of CoAl alloys produced at the University of Missouri-Rolla showed a dramatic decrease in the grain size which affects the yield strength and flow stress of long range ordered alloys, and a change in the grain shape with the addition of 0.5 % boron.

Biodiversity in Vegetation and Ecosystems»: symposium on the occasion of the retirement of Prof. Dr. Fred J.A. Daniels (Munster, Germany, July 11, 2008)

2008 ◽  
pp. 123-124
Author(s):  
N. V. Matveyeva
Keyword(s):  
Wide Range ◽  
65Th Anniversary ◽  
The University

July 2008 in Münster (Germany) hosted a Symposium on the occasion of the 65th anniversary of Professor of the University of this city, Fred Daniels (Frederikus Josephus Alphonsus Daniëls). The title of this Symposium «Biodiversity in Vegetation and Ecosystems» reflected the wide range of interests of the celebrant.

Tassos Papacostas and Maria Parani (eds.), Discipuli dona ferentes. Glimpses of Byzantium in Honour of Marlia Mundell Mango. Β υζ ά ν τ ι ο ς. Studies in Byzantine History and Civilization 11. Turnhout: Brepols Publishers, 2017. XXX, 486, 111 b/w figures.

Mediaevistik ◽  
2020 ◽  
Vol 32 (1) ◽  
pp. 333-337
Author(s):  
Natalia Teteriatnikov
Keyword(s):  
Late Antiquity ◽  
Oxford University ◽  
Present Volume ◽  
Wide Range ◽  
Byzantine Period ◽  
The University ◽  
Vast Territory ◽  
Byzantine History

The present volume is a tribute to Marlia Mango on the occasion of her retirement from the University service of Kings College, Oxford University. All essays, written by her students, offer the result of their research and express a profound gratitude to their teacher. The essays tackle a wide range of subjects covering a vast territory from Constantinople to its periphery as well as Italy. Chronologically diverse, research materials span from late antiquity to the late Byzantine period.

scholarly journals University of Dundee, Dundee, 12 April 2005

2005 ◽  
Vol 64 (1a) ◽  
pp. 26A-28A
Keyword(s):  
Scientific Meeting ◽  
The University

A Scientific Meeting was held at the University of Dundee, Dundee, 12 April 2005, when the following papers were presented. All abstracts are prepared as camera-ready material and are available as pdf.

scholarly journals Effects of a Twin-Screw Extruder Equipped with a Molten Resin Reservoir on the Mechanical Properties and Microstructure of Recycled Waste Plastic Polyethylene Pellet Moldings

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1058
Author(s):  
Hikaru Okubo ◽  
Haruka Kaneyasu ◽  
Tetsuya Kimura ◽  
Patchiya Phanthong ◽  
Shigeru Yao
Keyword(s):  
Mechanical Properties ◽  
Mechanical Performance ◽  
Value Added ◽  
Industrial Applications ◽  
Twin Screw Extruder ◽  
Screw Extruder ◽  
Polymer Properties ◽  
Wide Range ◽  
Twin Screw ◽  
Recycled Plastics

Each year, increasing amounts of plastic waste are generated, causing environmental pollution and resource loss. Recycling is a solution, but recycled plastics often have inferior mechanical properties to virgin plastics. However, studies have shown that holding polymers in the melt state before extrusion can restore the mechanical properties; thus, we propose a twin-screw extruder with a molten resin reservoir (MSR), a cavity between the screw zone and twin-screw extruder discharge, which retains molten polymer after mixing in the twin-screw zone, thus influencing the polymer properties. Re-extruded recycled polyethylene (RPE) pellets were produced, and the tensile properties and microstructure of virgin polyethylene (PE), unextruded RPE, and re-extruded RPE moldings prepared with and without the MSR were evaluated. Crucially, the elongation at break of the MSR-extruded RPE molding was seven times higher than that of the original RPE molding, and the Young’s modulus of the MSR-extruded RPE molding was comparable to that of the virgin PE molding. Both the MSR-extruded RPE and virgin PE moldings contained similar striped lamellae. Thus, MSR re-extrusion improved the mechanical performance of recycled polymers by optimizing the microstructure. The use of MSRs will facilitate the reuse of waste plastics as value-added materials having a wide range of industrial applications.

scholarly journals Beyond cultural and geographical proximity: delving into the factors that influence the dynamics of academic relationships between students in higher education

2021 ◽  
Author(s):  
José-Vicente Tomás-Miquel ◽  
Jordi Capó-Vicedo
Keyword(s):  
University Students ◽  
Academic Research ◽  
Past Research ◽  
Academic Networks ◽  
Level Data ◽  
Wide Range ◽  
Specific Stage ◽  
The University ◽  
Proximity Dimensions ◽  
Shed Light

AbstractScholars have widely recognised the importance of academic relationships between students at the university. While much of the past research has focused on studying their influence on different aspects such as the students’ academic performance or their emotional stability, less is known about their dynamics and the factors that influence the formation and dissolution of linkages between university students in academic networks. In this paper, we try to shed light on this issue by exploring through stochastic actor-oriented models and student-level data the influence that a set of proximity factors may have on formation of these relationships over the entire period in which students are enrolled at the university. Our findings confirm that the establishment of academic relationships is derived, in part, from a wide range of proximity dimensions of a social, personal, geographical, cultural and academic nature. Furthermore, and unlike previous studies, this research also empirically confirms that the specific stage in which the student is at the university determines the influence of these proximity factors on the dynamics of academic relationships. In this regard, beyond cultural and geographic proximities that only influence the first years at the university, students shape their relationships as they progress in their studies from similarities in more strategic aspects such as academic and personal closeness. These results may have significant implications for both academic research and university policies.

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