Results 321 to 330 of about 7,267,381 (385)

The response of photosynthesis and stomatal conductance to rising [CO2]: mechanisms and environmental interactions.

Plant, Cell and Environment, 2007
This review summarizes current understanding of the mechanisms that underlie the response of photosynthesis and stomatal conductance to elevated carbon dioxide concentration ([CO2]), and examines how downstream processes and environmental constraints ...
E. Ainsworth, A. Rogers
semanticscholar   +1 more source

Stomatal conductance and photosynthesis

, 1982
This research is part of an effort that the ICT (Institute of Tropical Cultivation) has been doing for several years tending to develop superior genotypes of cocoa (Theobroma cacao L.).
G. Farquhar, T. Sharkey
semanticscholar   +1 more source

The Interpretation of the Variations in Leaf Water Potential and Stomatal Conductance Found in Canopies in the Field

, 1976
Attempts to correlate values of stomatal conductance and leaf water potential with particular environmental variables in the field are generally of only limited success because they are simultaneously affected by a number of environmental variables.
P. Jarvis
semanticscholar   +1 more source

Generalized many-channel conductance formula with application to small rings.

Physical Review B (Condensed Matter), 1985
The conductance of a sample scattering elastically and coupled to leads with many channels is derived. We assume that all the incident channels on one side of the sample are fed from the same chemical potential.
M. Buttiker, Y. Imry, R. Landauer, S. Pinhas   +3 more
semanticscholar   +1 more source

Efficient Reduction of Graphite Oxide by Sodium Borohydride and Its Effect on Electrical Conductance

, 2009
The conductivity of graphite oxide films is modulated using reducing agents. It is found that the sheet resistance of graphite oxide film reduced using sodium borohydride (NaBH4) is much lower than that of films reduced using hydrazine (N2H4).
Hyeon-Jin Shin, Ki Kang Kim, A. Benayad, S. Yoon, H. Park, I. Jung, M. Jin, H. Jeong, Jong Min Kim, Jae-Young Choi, Y. H. Lee   +10 more
semanticscholar   +1 more source

Intrinsic conductivity of conducting polymers

Synthetic Metals, 1988
Because the charged dopant ions are spatially separated from the quasi-one-dimensional conduction path in conducting polymers, resistive back scattering is suppressed. In the case of high molecular weight and relatively few sp3 defects, even relatively weak interchain coupling is sufficient to avoid one-dimensional localization; this leads to coherent ...
Steven A. Kivelson, Alan J. Heeger
openaire   +2 more sources

Conductivity and photoconductivity of conducting polymers

Physica Scripta, 1992
A review is presented of the state of the art of conducting polymers. Special attention is given to the high electrical conductivity of highly ordered doped polyacetylene, to the attempts to reproduce σ-values above 105 S/cm, and to efforts to correlate the electrical conductivity with other physical parameters (European Brite/Euram Project HICOPOL).
M. Kaiser, S. Roth, Jürgen R. Reichenbach   +2 more
openaire   +2 more sources

Four-terminal phase-coherent conductance.

Physical Review Letters, 1986
A conductance formula for a sample of arbitrary shape with four terminals is derived to describe transport in the limit where carriers can traverse the sample without suffering phase-destroying events.
M. Büttiker
semanticscholar   +1 more source

Spin-dependent tunneling conductance of Fe | MgO | Fe sandwiches

, 2001
We present first-principles based calculations of the tunneling conductance and magnetoconductance of epitaxial $\mathrm{Fe}(100)|\mathrm{MgO}(100)|\mathrm{Fe}(100)$ sandwiches. Our results indicate that tunneling is much more interesting and complicated
W. Butler, Xiaoguang Zhang, T. Schulthess, J. M. Maclaren   +3 more
semanticscholar   +1 more source

TiOx-Based RRAM Synapse With 64-Levels of Conductance and Symmetric Conductance Change by Adopting a Hybrid Pulse Scheme for Neuromorphic Computing

IEEE Electron Device Letters, 2016
We propose TiOx-based resistive switching device for neuromorphic synapse applications. This device is capable of 64-levels conductance states because of their optimized interface between the metal electrode and the TiOx film. To compensate the change in
Jaesung Park, Myunghoon Kwak, Kibong Moon, J. Woo, Dongwook Lee, H. Hwang   +5 more
semanticscholar   +1 more source