Materials Literature
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Self-assembly of block copolymers with incompatible segments is known to generate a variety of different morphologies, and provides an attractive, alternative route to nanostructures. The authors describe some of their recent collaborative work on novel organometallic nanostructures made possible by the recent synthet…
The dilatational rheology of the poly(vinylacetate) monolayer onto an aqueous subphase with $p\mathrm{H}=2.0$ has been studied between 1 \ifmmode^\circ\else\textdegree\fi{}C and 25 \ifmmode^\circ\else\textdegree\fi{}C. The combination of several techniques, relaxation after a step compression, oscillatory barrier expe…
Treatment of the silanol ( c -C 5 H 9 ) 7 Si 8 O 12 (OH) with Cp‘‘Ti(CH 2 Ph) 3 (Cp‘‘ = 1,3-C 5 H 3 (SiMe 3 ) 2 ) or TiCl 4 selectively affords the mono(silsesquioxane) complexes Cp‘‘[( c -C 5 H 9 ) 7 Si 8 O 13 ]Ti(CH 2 Ph) 2 ( 1 ) and [( c -C 5 H 9 ) 7 Si 8 O 13 ]TiCl 3 ( 2 ), respectively, while with M(CH 2 Ph) 4 (M…
Light-induced color change of cholesteric copolymers containing a menthone derivative is reported here. In addition, solutions of these copolymers in low molecular mass liquid crystal mixtures to allow local changes of the reflection color are investigated. The ability to reflect visible light makes cholesteric liquid…
The power of genetic engineering methods, along with increasing genomic information, makes heterologous expression of proteins an extremely important biochemical tool. Unfortunately, proteins obtained in this way often are not in their native form, and folding becomes a crucial step in protein production. We have rece…
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTA Convergent Route to Novel Aliphatic Polyether DendrimersManikandan Jayaraman and Jean M. J. FréchetView Author Information Department of Chemistry, University of California Berkeley, California 94720-1460 Cite this: J. Am. Chem. Soc. 1998, 120, 49, 12996–12997Publica…
The title compound has been synthesized by slow diffusion of aqueous solutions containing K 4 [Mo(CN) 7 ]·2H 2 O and [Mn(H 2 O) 6 ](NO 3 ) 2, respectively. The compound crystallizes in the monoclinic system, space group P 2 1 / c . The Mo site is surrounded by seven −C−N−Mn linkages in a distorted pentagonal bipyramid…
Abstract Crystal structure is the arrangement of atoms or molecules in the solid state that involves consideration of defects, or abnormalities, in idealized atomic/molecular arrangements. The three-dimensional aggregation of unit cells in the crystal forms a space lattice or Bravais lattice. This article provides a b…
Abstract Solidification is a comprehensive process of transformation of the melt of metals and alloys into a solid piece, involving formation of dendrites, segregation which involves change in composition, zone formation in final structure of the casting, and microporosity formation during shrinkage. This article desc…
Abstract Cores of pelitic sediments (Eocene-Miocene) of the drillings Puchkirchen 1 and Geretsberg 1 (Molasse Basin, Upper Austria) have been studied to determine the mineralogical and chemical changes taking place during burial diagenesis. Mineralogical and chemical investigations of the bulk samples show that the de…
Industrial chimneys are a great part of environmental protection in industrial countries. In recent years many of them have been used to carrying away very aggressive gases from boilers and flue gas desulphurisation (FGD) units below acid dew‐point temperature. It is opf very important to modernize the old stacks and…
Other| December 01, 1998 Rubicline, a new feldspar from San Piero in Campo, Elba, Italy David K. Teertstra; David K. Teertstra University of Manitoba, Department of Geological Sciences, Winnipeg, MB, Canada Search for other works by this author on: GSW Google Scholar Petr Cerny; Petr Cerny Search for other works by th…
Primary (syn-growth) fluid inclusions in synthetic diamonds, produced within the field of their thermodynamic stability in a high-pressure split-sphere apparatus using the temperature gradient method, have been studied by optical microscopy and Raman spectroscopy. Inclusions in tabular diamond crystals contain CH 4 +o…
For revealing diethylene glycol (DEG) formation in poly(ethylene terephthalate) (PET) synthesis, this research focused on finding the stage most critical for DEG formation. It is found that the esterification stage was the most critical stage for DEG formation during production of PET through the direct esterification…
The metallurgical characteristics, toughness and corrosion resistance of dissimilar welds between duplex stainless steel Alloy 2205 and carbon steel A36 have been evaluated. Both duplex stainless steel ER2209 and Ni-based Alloy 625 filler metals were used to join this combination using a multipass, gas tungsten arc we…
Other| December 01, 1998 Prevalence and origin of birefringence in 48 garnets from the pyrope-almandine-grossularite-spessartine quaternary Anne M. Hofmeister; Anne M. Hofmeister Washington University, Department of Earth and Planetary Sciences, Saint Louis, MO, United States Search for other works by this author on:…
In this study, the results of experimental and analytical study on shape control of a composite beam with embedded shape memory alloy wire actuators are presented. The effects of the reactive moment of the SMA wire actuators on the shape control test are observed in detail. In shape control of a flexible composite str…
The stability, efficiency, speed, and spectral range of light-emitting devices (LEDs) made of nanoscale porous silicon is improving. The first part of this paper discusses the preparation and properties of nanoscale silicon, with emphasis on porous silicon. In the second part, the properties of LEDs made of porous sil…
The cumulative failure distributions of fatigue life of cast alloys is shown to be characterised by a number of distinct platforms and steps. A technique to demonstrate the existence of an ultimate step has been discovered. This illustrates for the first time that some current cast aluminium alloys are, at best, only…
This paper aims to draw attention to the need to better know and understand Mexican saline lakes. It does this by outlining their distribution, abundance and location and their physical, chemical and biological characteristics. The influence of climatic factors on saline lakes is discussed. To sharpen the focus of the…