Results 51 to 60 of about 271,303 (291)
Actualidades Biológicas, 2006 La Leishmaniosis y la enfermedad de Chagas son causas de importantes morbilidad y mortalidad en Colombia y en países tropicales. Los tratamientos existentes son insatisfactorios mientras que la enorme biodiversidad en nustro medio aparece como una fuente
Juliana Navarro-Yepes +3 more
doaj
From ‘motivational climate’ to ‘motivational atmosphere’: a review of research examining the social and environmental influences on athlete motivation in sport [PDF]
, 2010 This chapter is intended to provide a comprehensive review of the various theories of social and environmental factors that influence athletes’ motivation in sport.
Harwood, Chris +3 more
core
, 2003 Among early-type galaxies with almost circular isophotes E0 and E1 galaxies are, at 99.3% significance, more luminous than face-on objects classified as S0 (0) and S(0) (1).
de Vaucouleurs G. +2 more
core +2 more sources
In Situ Study of Resistive Switching in a Nitride‐Based Memristive Device
Advanced Functional Materials, EarlyView.In situ TEM biasing experiment demonstrates the volatile I‐V characteristic of MIM lamella device. In situ STEM‐EELS Ti L2/L3 ratio maps provide direct evidence of the oxygen vacancies migrations under positive/negative electrical bias, which is critical for revealing the RS mechanism for the MIM lamella device.
Di Zhang +19 more
wiley +1 more source
Unusual Swelling Behavior of Hydrogels Modified with Spiropyran as Appendage or Crosslinker
Advanced Functional Materials, EarlyView.Not so innocent after all—spiropyran crosslinkers in methylenebisacrylamide‐crosslinked poly(acrylamide‐co‐acrylic acid) hydrogels increase crosslinking density, but also, counterintuitively, increase swelling. Charge complexation, cooperative chemo‐mechanical effects, and aggregation may explain these observations.
Michael M. Lerch +7 more
wiley +1 more source
¿Nos encontramos frente a una nueva clase de mutagenos?
Revista de Química, 1990 El 1 ,3-dinitronaftaleno, previamente identificado en polvo ambiental, forma aductos covalentes con nucleótidos del DNA a temperatura ambiente fácilmente.
Oscar R. Cuyubamba +3 more
doaj
The b iosynthesis of histidine: imidazoleglycerol phosphate, imidazoleacteol phosphate, and histidinol phosphate [PDF]
, 1955 This is a report on the isolation and characterization of D-erythro-imidazoleglycerol phosphate (IGP), imidazoleacetol phosphate (IAP), and L-histidinol phosphate, which are accumulated in the mycelia of several of these ...
Ames, Bruce N., Mitchell, Herschel K.
core
An All‐Optical Driven Bio‐Photovoltaic Interface for Active Control of Live Cells
Advanced Functional Materials, EarlyView.Bio‐photovoltaic Interface (BIO‐PV‐I) for live cell manipulation is presented. BIO‐PV‐I can be activated non‐invasively and remotely to control the spatial motility, adhesion, and morphology of cells adhering to it. BIO‐PV‐I uses a patterned light‐induced electric potential in iron‐doped lithium niobate crystals whose light‐driven and reversible nature,
Lisa Miccio +8 more
wiley +1 more source
Three-Dimensional Navier-Stokes Simulation of Space Shuttle Main Propulsion 17-inch Disconnect Valves [PDF]
, 1991 A steady incompressible three-dimensional viscous flow analysis has been conducted for the Space Shuttle external tank/orbiter propellant feed line disconnect flapper valves with upstream elbows.
Kandula, M., Pearce, D. G.
core +2 more sources
Control of Polarization and Polar Helicity in BiFeO3 by Epitaxial Strain and Interfacial Chemistry
Advanced Functional Materials, EarlyView.In BiFeO3 thin films, the interplay of interfacial chemistry, electrostatics, and epitaxial strain is engineered to stabilize homohelicity in polarization textures at the domain scale. The synergistic use of a Bi2O2‐terminated Aurivillius buffer layer and a highly anisotropic compressive epitaxial strain offers new routes to control the polar‐texture ...
Elzbieta Gradauskaite +5 more
wiley +1 more source