Abstract:
Traveling-wave tube amplifiers and methods for making slow-wave structures for the amplifiers are provided. The SWSs include helical conductors that are self-assembled via the release of stressed electrically conductive strips from a sacrificial material. The helical conductors can be electroplated post-self-assembly to fortify the helix, reduce losses, and tailor the dimensions and operating parameters of the helix.
Abstract:
Compositions and methods for treating thrombosis, inflammation, and atherosclerosis by administration of a compound that binds to KRIT1 to inhibit binding with HEG1.
Abstract:
Methods for fabricating thin, high-aspect-ratio Ge nanostructures from high-quality, single-crystalline Ge substrates are provided. Also provided are grating structures made using the methods. The methods utilize a thin layer of graphene between a surface of a Ge substrate, and an overlying resist layer. The graphene passivates the surface, preventing the formation of water-soluble native Ge oxides that can result in the lift-off of the resist during the development of the resist.
Abstract:
Provided herein is an extremophile green alga designated as Scenedesmus species Novo, from Jemez warm water springs, New Mexico. Sequencing 18S rDNA confirmed the alga as a new species. It is capable of producing high levels of microalgal biomass in wastewater under harsh ambient climatic conditions, and of yielding high levels of lipids and carotenes. Cultures in TAP medium at 24±1° C. at continuous light (132-148 μmol photons m−2s−1) attained peak biomass levels 27.4×106 cells ml−1, 49.11 μg ml−1 chlorophyll α, 24.93 μg ml−1 carotene on the seventh day and a division rate of 0.54 day−1. High levels of biomass were sustained in sterilized and unsterilized municipal wastewater, enriched with 1% TAP nutrients or unenriched. The microalga is useful in the production of biofuels, fertilizers, dietary nutrients, pharmaceuticals, polymers, biofilters to remove nutrients and other pollutants from wastewaters, in space technology, and laboratory research systems.
Abstract:
Cyclic peptides inhibit LFA-1 interaction with ICAM-1 and are useful in treatment of hematopoietic neoplasms and in adjunct therapy in prevention of retinoic acid syndrome and diseases involving emigration of leukocytes into organ tissue.
Abstract:
Traveling-wave tube amplifiers for high-frequency signals, including terahertz signals, and methods for making a slow-wave structure for the traveling-wave tube amplifiers are provided. The slow-wave structures include helical conductors that are self-assembled via the release and relaxation of strained films from a sacrificial growth substrate.
Abstract:
Traveling-wave tube amplifiers and methods for making slow-wave structures for the amplifiers are provided. The SWSs include helical conductors that are self-assembled via the release of stressed electrically conductive strips from a sacrificial material. The helical conductors can be electroplated post-self-assembly to fortify the helix, reduce losses, and tailor the dimensions and operating parameters of the helix.
Abstract:
A self-assembling element fabricated using integrated circuit techniques may provide a small diameter helical conductor surrounding an electron beam for the construction of a vacuum electronic device such as a traveling-wave tube for terahertz scale signal.
Abstract:
The present disclosure is directed to biomimetic membranes and methods of manufacturing such membranes that include structural features that mimic the structures of cellular membrane channels and produce membrane designs capable of high selectivity and high permeability or absorptivity. The membrane structure, material and chemistry can be selected to perform liquid separations, gas separation and capture, ion transport and adsorption for a variety of applications.
Abstract:
The invention concerns a wavelength tunable semiconductor laser comprising a laser gain section (510) optically coupled to an underlying optical waveguide (520). According to an embodiment of the invention, a first and a second passive microring resonators (530, 560) having a whistle geometry, are arranged on both sides of the laser gain section and evanescently coupled with the optical waveguide (520). Highly reflective broadband mirrors (541, 571) are provided at the free ends of optical waveguide branches (240, 270) tangentially connected to the microring resonators. The first and second passive microrings resonators provide an optical feedback to the laser gain section and allow to select the desired wavelength. The laser structure can be implemented according to a III-V/Si technology.