05, 0.1, and 0.2 mol %) relative to sum of AAm and AAc. Superabsorbent hydrogel with W(eq) > 800 g H(2)O/g gel was obtained with percentage of 10 wt% of RHA and 0.1 of crosslinking agent mol %. Epigenetics inhibitor The hydro-gel showed to be sensitive to the pH variation and to the presence of salts.
The hydrogels, even though submitted through cycles of drying and swelling, preserved their superabsorbent characteristics and demonstrated better water absorbance properties when compared with commercial polyacrylamide gel. The composite hydrogels of poly(acrylamide-co-acrylate) with RHA presented good characteristics to be applied as soil conditioner for using in agriculture. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci Duvelisib 123: 879-887, 2012″
“Background Blood based indicators of biotin status in humans were shown to be useful tools in several clinical situations including pregnancy We previously validated the activity of the biotin dependent enzyme propionyl coenzyme A carboxylase (PCC) in lymphocytes as a sensitive and specific blood based indicator of marginal degrees of biotin deficiency However the measurement of PCC activity in population studies presents substantial ana lytic challenges 3 Hydroxyisovaleryl carnitine (3HIA carnitine) in creases in response to the decreased activity of the biotin dependent enzyme methylcrotonyl coenzyme A carboxylase and
might reflect biotin status
Objective We sought to determine whether the plasma concentration of 3HIA carnitine increases significantly in marginal biotin deficiency
Design We experimentally induced marginal asymptomatic
biotin deficiency in 10 healthy adults (8 women) by having the subjects consume undenatured egg white for 28 d biotin status was then repleted Plasma concentrations of 3HIA carnitine were measured on days 0 14 28 https://www.selleckchem.com/products/BKM-120.html 35 and 50 by liquid chromatography mass spectroscopy
Results The mean plasma 3HIA carnitine concentration increased with depletion (P < 0 0001) and decreased with repletion (P < 0 0001) Plasma 3HIA carnitine concentrations were greater than the upper limit of normal concentrations in 7 of 10 subjects by day 14 and in 9 of 10 subjects by day 28 and decreased to within normal limits in 9 of 10 subjects by day 50
Conclusions These studies provide evidence that 3HIA carnitine is an early and sensitive indicator of marginal biotin deficiency The ease of sample collection small sample volume requirement and stability of 3HIA carnitine during storage suggest that plasma 3HIA carnitine concentration is likely to be a useful indicator of marginal biotin deficiency for larger population studies Am J Clin Nutr 2010 92 1399-405″
“We report a new method for quantitative estimation of graphene layer thicknesses using high contrast imaging of graphene films on insulating substrates with a scanning electron microscope.