D. B. DILL’S (12) 1930s observations of humans working in desert heat made him skeptical of the high sweat chloride concentrations reported in the literature. At fault, he surmised, might be methods of sweat collection that “restricted opportunity for evaporation” (p. 763). For this reason, he developed whole body washdown (WBW) methods, which became de rigueur in his, and later in D. L. Costil...

Release of nickel from nickel or nickel-plated metals, is often responsible for allergic contact dermatitis. However, the effect of nickel-bearing stainless steels is not weil known. ln this paper AISI 304, 316 and 430 type stainless steels, as weil as nickel and nickel-plated materials, are investigated. Three tests were carried out: electrochemical tests and leaching experiments in sodium chl...

Mortar specimens were exposed to either a 3% NaCl solution or NaCl+KOH for up 180 days. Exposure the provoked much more leaching than exposure. Leaching strongly impacted chloride ingress profiles. The extended led maximum total content almost three times higher and deeper penetration exposure with limited after seems be linked enhanced binding capacity of C-S-H AFm phases upon moderate as dete...

This research aimed to characterize the physical and chemical properties of municipal solid waste (MSW) incineration fly ash, as well investigate leaching heavy metals during toxicity characteristics procedure (TCLP) process. To understand behaviour, concentrations metals, chloride, sulphate calcium at various leaching, time was monitored together with pH solution. Results showed that compositi...

Leaching of Arsenic from high Arsenic loaded iron oxide impregnated brick sands (IOI CBCM) was investigated using common household chemicals like common salt and soda ash, the industrial chemicals caustic soda and the phosphates used as fertilizers such as potassium hydrogen phosphate and TSP. Leaching by ordinary ground water was also investigated on the arsenic saturated iron oxide impregnate...

The selective and simultaneous ion-exclusion chromatography (IEC) with UV-detection on a weakly acidic cation-exchange resin column in the H+ -form (TSKgel Super IC-A/C) was developed and applied for the simultaneous determination of phosphate and silicate ions as the water quality parameters required for optimizing the water-leaching process for ceramics glaze raw materials of natural origin i...

In this paper, the pore structure characterization of concrete exposed to deionised water and 5% NaCl solution was evaluated using mercury intrusion porosity (MIP), scanning electron microscopy (SEM) and X-ray diffraction (XRD). The effects of calcium leaching, fly ash incorporation, and chloride ions on the evolution of pore structure characteristics were investigated. The results demonstrate ...

Studies on the extraction of milk-clotting enzyme after solid-state fermentation (SSF) of wheat bran by a local strain of Aspergillus oryzae LS1 were done. The extraction of the enzyme was found to be depended on different parameters like nature of extractant, soaking time, temperature etc. From different inorganic and organic extractants, calcium chloride (0.05%) and glycerol (40%) were found ...