Above T-N, it exhibits a cubic (Fd (3) over barm) structure. On lowering the temperature below T-N, weak superlattice reflections are observed

indicating the onset of AFM ordering accompanied by a rhombohedral distortion. The crystal structure in the AFM state is refined in R (3) over barm space group. (C) 2011 American Institute of Physics. GS-4997 [doi: 10.1063/1.3556917]“
“Background: During early postnatal development, the nervous system accretes docosahexaenoic acid (DHA; 22:6n-3), a highly unsaturated n-3 (omega-3) fatty acid (FA) used in the formation of neural cell membranes. DHA, which is present in human breast milk, may also be biosynthesized from n-3 FAs such as 18:3n-3 [alpha-linolenic acid (ALA)] or 20: 5n-3 [eicosapentaenoic acid (EPA)].

An important concern is to what extent these precursors can supply DHA to the developing infant.

Objective: We analyzed measurements of fractional percentages of plasma H-2(5)-ALA and C-13-U-EPA directed toward the synthesis of labeled 22: 6n-3 in 11 newborn infants by using compartmental modeling procedures.

Design: One-week-old infants received doses of H-2(5)-ALA and (CU)-C-13-EPA ethyl esters enterally. We drew blood from the infants periodically and analyzed the plasma for endogenous and labeled n-3 FAs. From the time-course concentrations of the labeled FAs, we determined rate constant coefficients, fractional synthetic rates, and plasma turnover rates of n-3 FAs.

Results: In infants, approximate to 0.04% of the H-2(5)-ALA Nutlin-3a price dose converted to plasma H-2(5)-EPA. Plasma H-2(5)-EPA and H-2(5)-22: 5n-3 [docosapentaenoic acid (DPA)] efficiently converted to H-2(5)-DPA and (2)H(5)DHA, respectively. The

percentage of plasma C-13-U-EPA directed toward the synthesis of C-13-DHA was lower than the percentage of plasma H-2(5)-EPA that originated from H-2(5)-ALA.

Conclusions: Endogenously synthesized EPA was efficiently converted to DHA. In comparison, Selleck ITF2357 preformed EPA was less efficiently used for DHA biosynthesis, which suggests a differential metabolism of endogenous EPA compared with exogenous EPA. However, on a per mole basis, preformed EPA was 3.6 times more effective toward DHA synthesis than was ALA. Newborns required an intake of approximate to 5 mg preformed DHA . kg(-1).d(-1) to maintain plasma DHA homeostasis. Am J Clin Nutr 2010; 92: 284-93.”
“A molecularly imprinted stir bar was prepared using bensulfuron-methyl as the template molecule and methacrylic acid as the functional monomer. The imprinted and nonimprinted stir bars were characterized by scanning electron microscopy, nitrogen sorption porosimetry, thermogravimetric analysis, and differential scanning calorimetry. Extraction time, desorption time and pH value affecting extraction efficiency of the stir bar have been evaluated to achieve the selectively direct preconcentration of the template from aqueous samples.