However, the possibility of functional/neurobehavioral deficits appearing later in life cannot be excluded.”
“A role for silicon (Si) in the amelioration of aluminium (Al) toxicity in gymnosperms is suggested by their codeposition in planta, including within needles. This study was designed to investigate Al/Si interactions at the cellular
level using selleckchem suspension cultures of Norway spruce. Toxic effects of Al were dependent on duration of Al exposure, concentration of Al. and pH. Toxicity was reduced when Si was present, and the effect was enhanced at pH 5.0 compared to pH 4.2. Study of the ultrastructure of Al-treated cells indicated that changes in cell wall thickening, degree of vacuolation, and the degeneration of mitochondria, Golgi bodies, ER and nucleus preceded cell death, and significant amelioration was noted when Si was also present. When the fluorescent dye Morin was employed to localise free Al, cells treated with Al and Si in combination showed less fluorescence this website than the cells treated with Al alone. Intensity of fluorescence depended on the concentration of Al, duration of
treatment and pH. Notably, presence of Si reduced the concentration of free Al in the cell wall in parallel with amelioration of Al toxicity. We therefore propose that formation of aluminosilicate complexes in the wall and apoplasm provide a significant barrier to Al penetration and cell damage in Norway spruce. (C) 2010 Elsevier B.V. All rights reserved.”
of silver and copper nanoparticles on wood drying of poplar boards were studied. The boards were cut by two patterns of flat-sawn and quarter-sawn, as well as three thicknesses of 2.5, 5 and 7.5 cm. They were divided in three groups of nanosilver-impregnated (NS), nanocopper-impregnated (NC), and control treatments. NS and NC boards were first impregnated with nanosilver and nanocopper suspensions, respectively; they were then dried in a laboratory convective kiln along with the control boards. The drying rate above check details and below the fiber saturation point (FSP), moisture content gradient slope, and drying residual stresses were measured. The results revealed higher drying rate both above and below the FSP in nanometal-impregnated boards. Also, less residual stress and moisture gradient slope were observed in NS and NC boards. It may then be concluded that nanometal particles may have the potentiality in improving the drying conditions and decreasing drying stresses in convective kilns.”
“Introduction: Prostate specific antigen (PSA) and digital rectal examination (DRE) are the main tests for initial prostate investigation; there is no consensus about the best criterion for prostate biopsies. We aim to check the accuracy of different criteria in this context including PSA derivatives to detect prostate cancer.