Results 21 to 30 of about 3,765,863 (364)

5,6-Dihydro-2H-pyran-3(4H)-on als Baustein zur Synthese pyrananellierter Heterocyclen [PDF]

open access: yes, 1984
Während 5,6-Dihydro-2H-pyran-3(4H)-on (3) sich mit ortho-substituierten Phenylcarbonylverbindungen nur in Einzelfällen regioselektiv zu pyrananellierten Heterocyclen umsetzt - z. B.
Eiden, Fritz, Wanner, Klaus Th.
core   +1 more source

Osmolytes changes for resistance in two cultivars of cotton (Gossypium hirsutum L.) Plants. [PDF]

open access: yesفیزیولوژی محیطی گیاهی, 2007
This study aims at the evaluation of physiological aspects of two cotton (Gossypium hirsutum L) cultivars, Siokra and Sahel to salin soil salinity [EC=12.3] collected from natural environment of Golestan province.
Mohammad Ali Rezaei
doaj  

Remoción de partículas adsorbentes de iones cobre por flotación Jet

open access: yesRevista de Metalurgia, 2009
Los resultados que se presentan en este artículo corresponden a los estudios realizados para la remoción de iones cobre desde efluentes sintéticos, utilizando la técnica de flotación por partículas adsorbentes (FPA) en una celda de flotación Jet (tipo ...
M. Santander   +4 more
doaj   +1 more source

Knowledge about epilepsy among health professionals: a cross-sectional survey in São Paulo, Brazil

open access: yesBMJ Open, 2012
Objective To evaluate the epilepsy knowledge among health professionals in São Paulo, Brazil. Design This is a cross-sectional study. Participants Professionals with academic degrees in physical education (n=134), nutrition (n=116), medicine (n=100 ...
R. Vancini   +8 more
semanticscholar   +1 more source

Trapped-ion quantum computing: Progress and challenges [PDF]

open access: yesApplied Physics Reviews, 2019
Trapped ions are among the most promising systems for practical quantum computing (QC). The basic requirements for universal QC have all been demonstrated with ions, and quantum algorithms using few-ion-qubit systems have been implemented.
C. Bruzewicz   +3 more
semanticscholar   +1 more source

Dynamic ion-ion and water-ion interactions in ion channels

open access: yesBiophysical Journal, 1992
The dynamic interactions among ions and water molecules in ion channels are treated based on an assumption that ions at binding sites can be knocked off by both transient entering ions and local water molecules. The theory, when applied to a single-site model K+ channel, provides solutions for super- and subsaturations, flux-ratio exponent (n') greater
openaire   +2 more sources

Stabilized mixed explicit finite element formulation for compressible and nearly-incompressible solids [PDF]

open access: yes, 2017
El presente estudio presenta una formulación mixta de elementos finitos capaz de abordar problemas quasiincompresibles en forma explícita. Esta formulación se aplica a elementos con interpolaciones independientes e iguales de desplazamientos y ...
Cervera Ruiz, Miguel   +3 more
core   +3 more sources

Caracterización de materiales centelleadores para dispositivos de fusión usando haces de iones negativos [PDF]

open access: yes, 2019
La producción de energía eléctrica mundial actual presenta diversos inconvenientes a largo plazo. Entre ellos destaca el impacto medioambiental y la agotabilidad de los combustibles fósiles, la limitación en abastecimiento global de las renovables, y
Villegas Domínguez, Jairo Antonio
core  

The New SI and the Fundamental Constants of Nature [PDF]

open access: yes, 2020
The launch in 2019 of the new international system of units is an opportunity to highlight the key role that the fundamental laws of physics and chemistry play in our lives and in all the processes of basic research, industry and commerce.
Martin-Delgado, Miguel A.
core   +3 more sources

A reflection on lithium-ion battery cathode chemistry

open access: yesNature Communications, 2020
Lithium-ion batteries have aided the portable electronics revolution for nearly three decades. They are now enabling vehicle electrification and beginning to enter the utility industry.
A. Manthiram
semanticscholar   +1 more source

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