Now showing items 771-780 of 814
Elastic modulus of poly(ethylene oxide) determined from the Raman longitudinal acoustic mode
(John Wiley & Sons, Inc., 1990-01-15)
The chain modulus of poly(ethylene oxide) is determined by the Raman longitudinal acoustic mode method with the aid of a normal coordinate analysis and found to be 1.3 × 10 11 dyn/cm 2 . Our normal mode calculations provide ...
Synthesis of a disulfide cross-linked DNA triple helix
(Elsevier, 1994-06-27)
An intramolecular DNA triple helix incorporating a disulfide cross-link has been synthesized. Potassium permanganate footprinting and UV melting analysis demonstrate that the cross-link increases the conformational stability ...
A knowledge-based system for nondestructive testing of polymeric composite components
(Springer-Verlag, 1992-03)
This paper presents a formalization of the knowledge domain of nondestructive quality control of polymeric composite components. The formalization scheme presented in this paper has been implemented in a prototype ...
Phase Stability and Physical Properties of Cubic and Tetragonal ZrO 2 in the System ZrO 2 –Y 2 O 3 –Ta 2 O 5
(Blackwell Publishing Ltd, 1991-12)
Grain Boundary Mobility in Y 2 O 3 : Defect Mechanism and Dopant Effects
(Blackwell Publishing Ltd, 1996-07)
Preparation of polyfunctional diorganomercurials and their transmetallation to diorganozincs. Applications to the preparation of optically active secon
(Elsevier, 1992-10-13)
Two new methods of preparation of functionalized diorganomercurials have been developed. The first method involves a substitution reaction of (ICH2 Their transmetallation with zinc dust (toluene, 80[deg]C, 3-5 h) affords ...
Report On ‘Comprehensive Curricular Change at a Small Liberal Arts College: Bioorganic First at Juniata College’
(Springer-Verlag; Springer-Verlag New York, Inc., 1998-02)
Because the conceptual basis of the curriculum is that the majority of the students are not chemists, participants in this session examined which aspects of organic chemistry are really necessary for a nonchemical (mostly ...
Defect interactions on solid surfaces
(Elsevier, 1993-03-10)
A unified approach to the calculation of the elastic interaction between defects on a surface that describe, for example, steps, islands, and stress domains is presented. This is accomplished by determining the spatial ...
Characterization and regulation of phosphatidylglycerolphosphate phosphatase in Saccharomyces cerevisiae
(Elsevier, 1990-09-18)
Phosphatidylglycerophosphatase (EC 3.1.3.27) activity was characterized in mitochondrial extracts from Saccharomyces cerevisiae. The enzyme has a pH optimum of 5.5. Maximum activity occurs in the presence of Triton X-100 ...
Hydrodesulfurization over model sulfide cluster-derived catalysts
(Elsevier, 1991)
There is growing interest in the use of organometallic clusters as precursors to model heterogeneous catalysts. This interest is partially derived from the expectation that "solid-state metal complex catalysts" will be ...