channel activities, particularly those of calcium channels, have vital roles in the process of sperm maturation, motility and sperm-egg interaction. a group of the recently discovered ion channels associated with these processes is four novel channel-like proteins known as catsper (cation channel sperm) gene family. catsper1 and catsper2 show sperm specific expression patterns. however, neither...

A self-consistent field theory is developed for polymers that are capable of binding small ionic molecules (adsorbates). The polymer-ionic molecule association is described by Ising-like binding variables, C(i) ((a))(kDelta)(=0 or 1), whose average determines the number of adsorbed molecules, n(BI). Polymer gelation can occur through polymer-ionic molecule complexation in our model. For polymer...

We consider a nanoscale dipolar emitter ~quantum dot, atom, fluorescent molecule, or rare-earth ion! in a nanometer proximity to a flat metal surface. There is strong interaction of this emitter with unscreened metal electrons in the surface nanolayer that causes enhanced relaxation due to surface plasmon excitation and Landau damping. To describe these phenomena, we developed analytical theory...

“ -‘ One can use a feedback system to suppress the fmt ion instability. However, the feedback noise (and also other sources of noise in the machine) c-ontinously excites the transient oscillations in the electron beam that are m“plified through the electron interaction with the ions. We calculate the equilibrium level of these oscillations under the influence of the feedback and show how they g...

This pallet derives the ha.sis of a theory, of communicat ion from a formal theov,.' of rat ional interaction. The major result is a <h, mon~t fa l len t hat. i lh ,c , t ionary acts need not I)e pr imit ive, and .ee, I uot he reco~'nized..\s a t,'st case. we derive Searle's condit ions on reqt,est in~ from pri ,ciples of ralionality coupled with a ~;ric~,an theory of iml~erativ,.s. The theory ...

Substances known as nitrogen mustards turn into aziridinium ion through the intramolecular cyclization SN1. This ion reacts with the DNA preferably at the N7 position of the guanine, and because of this, it is an important antineoplastic agent. Based on this, the objective of this study is to quantify the interaction between the nitrogen mustard mechlorethamine and the guanine, using the NBO an...

The charge states of ions in dense plasmas fluctuate due to collisional ionization and recombination. Here, we show how, by modifying the ion interaction potential, these fluctuations can mediate energy exchange between plasma electrons ions. Moreover, develop a theory for this novel electron-ion transfer mechanism. Calculations using random walk approach suggest that rate from state could be c...

ab initio calculations at the density functional theory (dft) and the second-order møller−plessetperturbation theory levels with 6-31+g(d), 6-31g(d) basis sets for non-metal atoms and lanl2dzfor metal have been performed for the adsorption of dimethyl methylphosphonate (dmmp) on znoby gaussisn 98 program. the calculated rotational constants by b3lyp/6-31g(d) are in moreagreement with the experi...

The infinite-order regular approximation (IORA) and IORA with modified metric (IORAmm) is used to develop an algorithm for calculating relativistically corrected isotropic hyperfine structure (HFS) constants. The new method is applied to the calculation of alkali atoms Li-Fr, coinage metal atoms Cu, Ag, and Au, the Hg(+) radical ion, and the mercury containing radicals HgH, HgCH(3), HgCN, and H...