Ushma Kriplani

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We report systematic studies of the de transport properties in proton-irradiated Y-Ba.-Cu-0 single crystals. We find that the onset of vortex dissipation in moderately irradiated samples is a.ssoc:iated. with the occurrence of a second-order vortex-solid melting transition. In addition, the decreasing zero-field transition temperature and increasing(More)
Diffraction patterns were measured on a polycrystalline bcc Fe foil using a Mössbauer powder diffractometer with high sensitivity. Measurements with and without a magnetic field normal to the scattering plane showed large differences in the diffracted intensities of the different nuclear resonances. These magnetic effects on diffraction intensities were(More)
We describe a bacteriophage M13 substrate library encoding the AviTag (BirA substrate) and combinatorial heptamer peptides displayed at the N terminus of the mature form of capsid protein III. Phages are biotinylated efficiently (> or = 50%) when grown in E. coli cells coexpressing BirA, and such viral particles can be immobilized on a streptavidin-coated(More)
Materials that combine inorganic components and biological molecules provide a new paradigm for synthesizing nanoscale and larger structures with tailored physical properties. These synthesis techniques utilize the molecular recognition properties of many biological molecules to nucleate and control growth of the nanoscale structure. Phage-displayed peptide(More)
For the first time, Mössbauer powder diffractometry went beyond the proof-of-principal stage and was used to study unknown periodicities of defect-related chemical environments of Fe atoms in a partially-ordered Fe3Al polycrystalline sample. Mössbauer powder diffractometry is based on two phenomena, the Mössbauer effect and the Bragg diffraction. The(More)
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