Papers by Andres Martinez
Febs Letters, 1990
Bovine adrenal tyrosine hydroxylase (TH) is isolated in a partially inhibited state with the feed... more Bovine adrenal tyrosine hydroxylase (TH) is isolated in a partially inhibited state with the feed-back inhibitors adrenaline and noradrenaline tightly coordinated to high-spin (S= 5/2) Fe(II1) at the active site. In addition to the charge-transfer interaction with iron, an additional charged group in the polypeptide chain, with an apparent p& of about 5.3 at 4"C, is involved in the binding of catecholamines. Protonation of this group increases the pseudo-first order rate constant for the dissociation of the TH-PH]noradrenaline complex more than lOO-fold at 4°C. At pH 7.0 and 3O"C, phosphorylation of Ser-40 causes a 6-fold increase in the rate constant for this dissociation.
13µm 13µm 13µm 13µm T 3 T 2 T 1 R 3 R 2 R 1 r 2 =16µm r 1 =7µm r 3 =31.25µm
IEEE Photonics Technology Letters, 2006
Mode group diversity multiplexing (MGDM) is an optical multiple-input-multiple-output technique t... more Mode group diversity multiplexing (MGDM) is an optical multiple-input-multiple-output technique that aims at creating independent communication channels over a multimode fiber, using subsets of propagating modes. This letter deals with the analysis of an MGDM point-to-point link, transparent to the transmission format. The geometry of a mode-group selective multi/demultiplexer is optimized in order to minimize the crosstalk among the channels. The power penalty is calculated when a zero-forcing algorithm is used to mitigate the crosstalk.
Conjunto de organizaciones interdependientes que participan en el proceso de poner un producto ... more Conjunto de organizaciones interdependientes que participan en el proceso de poner un producto o servicio a la disposición del consumidor o del usuario de negocios.
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Papers by Andres Martinez