Results 21 to 30 of about 388,039 (180)
mSphere, 2021 Analysis of nitrogen isotope fractionation effects is useful for tracing biogeochemical nitrogen cycle processes. Nitrification can cause large nitrogen isotope effects through the enzymatic oxidation of ammonia (NH3) via nitrite (NO2−) to nitrate (NO3−)
Shurong Liu +5 more
doaj +1 more source
Pressure dependence of the oxygen isotope effect in YBa$_2$Cu$_4$O$_8$ [PDF]
, 2007 We have carried out measurements of the pressure dependence to 1.2 GPa of the oxygen isotope effect on $T_c$ in the high-$T_c$ superconductor YBa$_2$Cu$_4$O$_8$ using a clamp cell in a SQUID magnetometer.
G. V. M. Williams +9 more
core +1 more source
Isotope mass dependence of pedestal transport in JET H-mode plasmas
Nuclear Fusion, 2023 We present a comparative transport analysis of the isotope mass dependence in the pedestal of two pairs of deuterium/hydrogen type I ELMy H-mode discharges in JET with ITER-like wall, one characterized by the same input power, the other one by the same ...
I. Predebon +8 more
doaj +1 more source
Molecules, 2018 The synthesis of signal lipids, including eicosanoids, is not fully understood, although it is key to the modulation of various inflammatory states.
Dmitry V. Chistyakov +9 more
doaj +1 more source
Inverse Iron Isotope Effect on the transition temperature of the (Ba,K)Fe2As2 superconductor [PDF]
, 2009 We report that (Ba,K)Fe2As2 superconductor (a transition temperature, Tc = 38 K) shows inverse Iron isotope effect (-0.18) (the sample including the larger atomic weight of Fe depicts higher Tc).
Akira Iyo +10 more
core +1 more source
Isotope effect on the superfluid density in conventional and high-temperature superconductors
, 2010 We investigate the isotope effect on the London penetration depth of a superconductor which measures $n_S/m^*$, the ratio of superfluid density to effective mass.
A. A. Abrikosov +10 more
core +1 more source
Structure and superconductivity of isotope-enriched boron-doped diamond
Science and Technology of Advanced Materials, 2008 Superconducting boron-doped diamond samples were synthesized with isotopes of 10B, 11B, 13C and 12C. We claim the presence of a carbon isotope effect on the superconducting transition temperature, which supports the 'diamond-carbon'-related nature of ...
Evgeny A Ekimov, Vladimir A Sidorov, Andrey V Zoteev, Yury B Lebed, Joe D Thompson and Sergey M Stishov
doaj +1 more source
Boron isotope effect in single crystals of ErNi$_2$B$_2$C superconductor
, 2012 The influence of local moment magnetism on the boron isotope effect of T$_c$ was studied on single crystals of ErNi$_2$B$_2$C. Values of the partial isotope effect exponent of $\alpha_B$=0.10$\pm$0.02 and $\alpha_B$=0.10$\pm$0.04 were obtained based on ...
Abrikosov A +5 more
core +1 more source
Isotope effect on the electron band structure of doped insulators [PDF]
, 2004 Applying a continuous-time quantum Monte-Carlo algorithm we calculate the exact coherent band dispersion and the density of states of a two dimensional lattice polaron in the region of parameters where any approximation might fail.
Alexandrov, A. S., Kornilovitch, P. E.
core +2 more sources
Characterization of the Transition State of Functional Enzyme Dynamics [PDF]
, 2006 Through characterization of the solvent isotope effect on protein dynamics, we have examined determinants of the rate limitation to enzyme catalysis. A global conformational change in Ribonuclease A limits the overall rate of catalytic turnover.
Kovriguine, Evgueni, Loria, J. Patrick
core +2 more sources