10,981 research outputs found
Extremal metrics for the -curvature in three dimensions
We construct contact forms with constant -curvature on compact
three-dimensional CR manifolds which admit a pseudo-Einstein contact form and
satisfy some natural positivity conditions. These contact forms are obtained by
minimizing the CR analogue of the -functional from conformal geometry. Two
crucial steps are to show that the -operator can be regarded as an
elliptic pseudodifferential operator and to compute the leading order terms of
the asymptotic expansion of the Green's function for .Comment: Final version; Corrects minor typos; This is an announcement of the
main results of arXiv:1511.05013; 5 page
Anisotropic Relaxation Functions and Strength of Oriented Solids Technical Report No. 106
Anisotropic relaxation functions and strength of oriented solid
Anomeric O-Functionalization of Carbohydrates for Chemical Conjugation to Vaccine Constructs.
Carbohydrates mediate a wide range of biological interactions, and understanding these processes benefits the development of new therapeutics. Isolating sufficient quantities of glycoconjugates from biological samples remains a significant challenge. With advances in chemical and enzymatic carbohydrate synthesis, the availability of complex carbohydrates is increasing and developing methods for stereoselective conjugation these polar head groups to proteins and lipids is critically important for pharmaceutical applications. The aim of this review is to provide an overview of commonly employed strategies for installing a functionalized linker at the anomeric position as well as examples of further transformations that have successfully led to glycoconjugation to vaccine constructs for biological evaluation as carbohydrate-based therapeutics
Mechanisms of wave transformation in finite-depth water
Mechanisms of wave transformation in finite-depth water are investigated. The linear mechanisms ex- amined are percolation, bottom motion, shoaling, and refraction. The nonlinear mechanisms examined are wave-wave interaction and bottom friction. New exact computations of the nonlinear transfer for fi- nite-depth waves are presented for some directional wave spectra. These mechanisms are found to ex- plain satisfactorily wave decay observations obtained at several sites with different bottom sediment properties. The decay rates at these sites are found to be dominated by different mechanisms which are determined by the bottom conditions. As an example, detailed calculations are presented for data ob- tained at the Jonswap site
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