4,693 research outputs found
Development of an improved oxygen electrode for use in alkaline H2-O2 fuel cells Quarterly report, Oct. 1 - Dec. 31, 1966
Interstitial compounds of transition elements prepared for improving oxygen electrode in alkaline hydrox fuel cel
Interstitial compounds as fuel cell catalysts - Their preparative techniques and electrochemical testing
Preparation and electrochemical testing methods for fuel cell catalysts using interstitial compound
FLASH: ultra-fast protocol to identify RNA-protein interactions in cells
Determination of the in vivo binding sites of RNA-binding proteins (RBPs) is paramount to understanding their function and how they affect different aspects of gene regulation. With hundreds of RNA-binding proteins identified in human cells, a flexible, high-resolution, high-throughput, highly multiplexible and radioactivity-free method to determine their binding sites has not been described to date. Here we report FLASH (Fast Ligation of RNA after some sort of Affinity Purification for High-throughput Sequencing), which uses a special adapter design and an optimized protocol to determine protein-RNA interactions in living cells. The entire FLASH protocol, starting from cells on plates to a sequencing library, takes 1.5 days. We demonstrate the flexibility, speed and versatility of FLASH by using it to determine RNA targets of both tagged and endogenously expressed proteins under diverse conditions in vivo
3-Methylthiobenzamide
In the title compound, C8H9NS, the dihedral angle between the aromatic ring and the thioamide fragment is 36.0 (2)°. There are π-stacking interactions between coplanar aryl fragments, with a centroid–centroid separation of 3.658 (2) Å. In addition, there are intermolecular hydrogen bonds between the amino group and the S atoms
4-Chlorobenzothioamide
In the title compound, C7H6ClNS, the dihedral angle between the aromatic ring and the thioamide fragment is 28.1 (2)°. The structure features a π-stacking interaction between the aromatic rings with a slight offset of the rings, giving a centroid–centroid separation of 3.7942 (2) Å. There are intermolecular hydrogen-bonding interactions between the amino group and the S atoms
4-Bromothiobenzamide
The title compound, C7H6BrNS, crystallizes with two molecules in the asymmetric unit. The dihedral angles between the aromatic ring and the thioamide fragment are 23.6 (4) and 20.5 (3)° in the two molecules. In the crystal, there are intermolecular N—H⋯S hydrogen-bonding interactions between the amine group and the S atoms
Development of an improved oxygen electrode for use in alkaline H2-O2 fuel cells Quarterly report, Apr. 1 - Jun. 30, 1967
Preparation of institial compounds of transition metals for hydrogen oxygen fuel cell cathode
Screw dislocation in zirconium: An ab initio study
Plasticity in zirconium is controlled by 1/3 screw dislocations
gliding in the prism planes of the hexagonal close-packed structure. This
prismatic and not basal glide is observed for a given set of transition metals
like zirconium and is known to be related to the number of valence electrons in
the d band. We use ab initio calculations based on the density functional
theory to study the core structure of screw dislocations in zirconium.
Dislocations are found to dissociate in the prism plane in two partial
dislocations, each with a pure screw character. Ab initio calculations also
show that the dissociation in the basal plane is unstable. We calculate then
the Peierls barrier for a screw dislocation gliding in the prism plane and
obtain a small barrier. The Peierls stress deduced from this barrier is lower
than 21 MPa, which is in agreement with experimental data. The ability of an
empirical potential relying on the embedded atom method (EAM) to model
dislocations in zirconium is also tested against these ab initio calculations
Polymeric Piezoelectric Transducers for Hydrophone Applications
Conventional ceramic piezoelectric materials have been used in hydrophones for sonarapplications since 1940's. In the last few years since the discovery of polymeric piezoelectrichydrophones, the technology has matured, applications have emerged in extraordinary number ofcases such as underwater navigation, biomedical applications, biomimetics, etc. Hydrophones areused underwater at high hydrostatic pressures. In the presence of hydrostatic pressures, theanisotropic piezoelectric response of ceramic materials is such that it has poor hydrophone performancecharacteristics whereas polymeric piezoelectric materials show enough hydrostatic piezoelectriccoefficients. Moreover, piezoelectric polymers have low acoustic impedance, which is only 2-6 timethat of water, whereas in piezoelectric ceramics, it is typically 11-time greater than that of water. Aclose impedance match permits efficient transduction of acoustic signals in water and tissues. Newlydeveloped hydrostatic-mode polyvinylidene flouride (PVDF) hydrophones use a pressure-releasesystem to achieve improved sensitivity. Recently, voided PVDF materials have been used for makinghydrophones having higher sensitivity and figure of merit than unvoided PVDF materials
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