The effects of the functional groups and structures of two different resins, weak base/macroporous and strong base/gel type, Purolite A170 and Dowex 21K on the adsorption properties of Re(VII) ions were investigated experimentally and described by the isotherm, kinetic, and thermodynamic modeling. In this regard, four widely used adsorption isotherm models including Langmuir, Freundlich, Temkin...

Excessive concentrations of nitrate in ground water are known to cause human health hazards. A submerged membrane adsorption hybrid system that includes a microfilter membrane and four different adsorbents (Dowex 21K XLT ion exchange resin (Dowex), Fe-coated Dowex, amine-grafted (AG) corn cob and AG coconut copra) operated at four different fluxes was used to continuously remove nitrate. The ex...

Laboratory tests and a field validation experiment were performed to evaluate anion exchange resins for uranium sorption and desorption in order to develop a uranium passive flux meter (PFM). The mass of uranium sorbed to the resin and corresponding masses of alcohol tracers eluted over the duration of groundwater installation are then used to determine the groundwater and uranium contaminant f...

Discharging phosphate through wastewaters into waterways poses a danger to the natural environment due to the serious risks of eutrophication and health of aquatic organisms. However, this phosphate, if economically recovered, can partly overcome the anticipated future scarcity of phosphorus (P) resulting from exhaustion of natural phosphate rock reserves. An experiment was conducted to determi...

Recovery of gold from copper-rich ores has proved challenging. Dissolved copper in cyanide-deficit leach solutions severely interferes with adsorption resulting low recoveries onto activated carbon or ion exchange resins. This study reports the efficiency different adsorbents for selective recovery copper-containing cyanide leachate. Activated (NORIT GAC 1240), mixed base (Purogold A193), stron...

In the fat body of Locusta migratoria, an RNA transcript of about 800 nucleotides has been detected that is specific to the adult female and dependent on induction by juvenile hormone (JH) or an analog. The corresponding cDNA has been cloned (lambda 21) and a 718-base pair sequence determined. It encodes a 196-amino acid polypeptide, including a signal peptide. An NH2-terminal sequence has 24 o...

The domain structure of plasma fibronectin was studied by limited proteolysis with trypsin and thermolysin. Intact hamster plasma fibronectin is a disulfide-bonded dimer of two nonidentical subunit polypeptides with M, = 230,000 (a subunit) and 210,000 (B subunit). Mild trypsin treatment selectively released a small fragment with M, = 32,000 (designated as 32K fragment, others are designated in...

Muñoz-Pérez I, Moreno-Pérez D, Cardona-González C, Esteve-Lanao J. Prediction of race pace in long distance running from blood lactate concentration around race pace. J. Hum. Sport Exerc. Vol. 7, No. 4, pp. 763-769, 2012. The aim of this study was to develop an equation for predicting the performance in 10 kilometers road race (10k), Half Marathon (21k) and Marathon (42k), using the blood lacta...