tain low (Mg )i in cytotrophoblast cells. In addition (Mg )i is acutely regulated by (Mg 2 )o. Because placental trophoblasts are sites of maternal–fetal ion exchange, and (Mg )o is altered in preeclampsia, derangements in or modulation of this exchanger may contribute to complications of pregnancy such as pregnancy-induced hypertension, preeclampsia, and preterm labor. If a Na /Mg antiporter i...

Thermodynamic modeling of the H-Mg-Na system is performed for the first time in this work in order to understand the phase relationships in this system. A new thermodynamic description of the stable NaMgH3 hydride is performed and the thermodynamic models for the H-Mg, Mg-Na, and H-Na systems are reassessed using the modified quasichemical model for the liquid phase. The thermodynamic propertie...

Recent data in the literature support the role of nicotinamide (NA) as a pharmacologic agent that stimulates pancreatic beta-cells to produce insulin in vitro. There are data showing that carbon nanotubes may be useful in initiating and maintaining cellular metabolic responses. This study shows that administration of multiwalled carbon nanotubes (MWCNTs) functionalized with nicotinamide (NA-MWC...

Microsomes prepared from electric organ of Electrophorus electricus contain, in addition to a sodiumand potassiumactivated adenosine triphosphatase, two different ATP-ADP transphosphorylases; one requires only magnesium, while the other requires Mg++ + Na+. The Mg++-activated nucleotide exchange is nonspecific with respect to substrates and is probably unrelated to the highly specific Na+-K+ATP...

The pharmacokinetics of the hepatobiliary transport of an anionic drug, 7,8-dihydro-5-[(E)-[[a-(3-pyridyl)-benzylidene]aminooxy]ethyl]-1- naphthyloxy]acetic acid (ONO-1301), a new prostaglandin (PG) I2 receptor agonist, was investigated in rats. During intravenous infusion of this compound, the drug concentrations in arterial blood, hepatic vein and liver and the biliary excretion rate were mea...

Abs t rac t -The exchange reactions of Na, Ca and Mg on montmorillonite are revisited employing recently developed analytical and theoretical approaches. The fractional adsorption of the cations has been determined by displacing them from the adsorbed state in one step, using a low concentration of an organic cation of large binding affinity. The analysis of displaced and solution cations emplo...

a solution culture experiment was conducted to evaluate the salinity tolerance of 15 tomato genotypes in hoagland’s nutrient solution with three levels of nacl (0, 75, and 150 mm). the experiment was conducted in completely randomized design with three replicates. after 30 days of imposition of salt stress, gas exchange parameters including transpiration rate, stomatal conductance, co2 assimila...

Outbursts of nova are thought to be caused by explosions arising from hydrogen burning of proton-rich unstable nuclei. The detection of g radiation of such radioactive nuclei offers a method to study the parameters of these nova. The recent stellar observation of the 1.275-MeV g ray of Na suggests its possible origin in such outbursts. The expected reaction sequence is considered to be Ne(p ,g)...

The novel Na(+)/K(+)-ATPase inhibitor (E,Z)-3-((2-aminoethoxy)imino)androstane-6,17-dione hydrochloride (PST2744) was characterized for its inotropic and toxic properties. Inhibition potency on dog kidney Na(+)/K(+)-ATPase was comparable (0.43 microM) to that of digoxin (0.45 microM). PST2744 concentration-dependently increased force of contraction in guinea pig atria and twitch amplitude in is...