HPLC analysis showed that onion peel extracts contained well-known antioxidant compounds, including epicatechin and morin. All of the flavonoids measured and oxygen radical absorbance capacity (ORAC) values were greatest in the methanolic extract. ORAC was strongly correlated with total phenolic content (r(2)=0.980). The total radical trapping antioxidant potential was greatest in the ethanolic extract. DPPH radical-scavenging activity was in the order of acetonic>ethanolic>methanolic

extract. In contrast, the reducing capacity of intracellular oxidative stress was almost the same in all extracts. In addition, pretreatment with onion peel significantly reduced human leukocyte DNA damage induced by H2O2 or 4-hydroxynonenal. Taken together, the results indicate that onion peel has antioxidative and antigenotoxic properties.”
“Tunable second harmonic generation www.selleckchem.com/products/gw3965.html of pulsed CO(2) laser radiation in a GaSe Apoptosis inhibitor crystal was demonstrated. The nonlinear optical properties of

GaSe and phase-matching conditions were investigated, and the best fitted dispersion relationships for this crystal were also determined. External conversion efficiency of 0.1% with unfocused pumped radiation had been achieved and maximum single pulse energy of 0.19 mJ was generated at 5.3 mu m. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3415533]“
“Poly(ethylene terephthalate) (PET) sheets of different crystallinity were obtained by annealing the amorphous PET (aPET)

sheets at 110 degrees C for various times. The peaks of enthalpy recovery and double cold-crystallization in the annealed aPET samples with different crystallinity were investigated by a temperature-modulated differential scanning calorimeter (TMDSC) and a dynamic mechanical analyzer (DMA). The enthalpy recovery peak around the glass transition temperature was pronounced in TMDSC nonreversing heat flow curves and was found to shift to higher temperatures with higher degrees of crystallinity. The magnitudes of the enthalpy recovery peaks were found to increase with annealing times for samples annealed <= 30 min but to decrease with annealing times for samples annealed >= 40 min. The nonreversing VE 822 curves also found that the samples annealed short times (<= 40 min) having low crystallinity exhibited double cold-crystallization peaks (or a major peak with a shoulder) in the region of 108-130 degrees C. For samples annealed long times (>= 50 min), the cold-crystallization peaks were reduced to one small peak or disappeared because of high crystallinity in these samples. The double cold-crystallization exotherms in samples of low crystallinity could be attributed to the superposition of the melting of crystals, formed by the annealing pretreatments, and the cold-crystallizations occurring during TMDSC heating. The ongoing crystallization after the cold crystallization was clearly seen in the TMDSC nonreversing heat flow curves.