The sensory differences between the two nicotine isomers were studied. The results showed that: 1) The optimized chromatography condition included an Agilent InfinityLab Poroshell Chiral-T column, with a mobile phase consisted of methanol and acetonitrile at the volum...
13–15. Thus, the conversion between the two conformational isomers again demonstrates the importance of acetonitrile in crystallizing the Au60S8 NCs: high-content of acetonitrile is helpful to the growth of relatively high polar Au60S8r crystals, while low content of CH3CN is beneficial to the...
This behavior is expected when acetate and inethoxide ions are competing in an ionic process because of the preferen- tial stabilization of nlcthoxide ion by the Lewis acid, BFs. I t is of interest that the oxy- rnercuration of the ester, XVIII, in methanol leads to X X I I I in...
Half of one μl tryptic peptide extracts were dispensed on to a MALDI sample plate along with 0.5 μl of matrix solution consisting of 10 mg/ml α-cyano-4-hydroxycinnamic acid, 0.1% TFA and 50% acetonitrile. External peptide calibrants, angiotensin I (monoisotopic mass, 1296.6853), rennin ...
The dried residue was resuspended in 100 µL acetonitrile and 10 µL of pentafluorobenzyl bromide, and 10 µL of triethylamine were added. The mixture was then heated to 75 °C for 20 min; 2 mL of sodium acetate buffer (pH 5.0) and 1 mL of hexane were added after cooling. The...
Selected slides were coated with the HABA (2-4-Hydroxyphenylazo benzoic acid) matrix sprayed at 1.5 mg/mL dissolved in 125 mM NH42SO4 in 50/50 acetonitrile/H2O in the presence of 0.2% trifluoroacetic acid using an Image Prep device (Bruker Daltonik GmbH, Bremen, Germany). For external ...
The mobile phases A and B were 0.6 mmol/L sodium acetate and 0.15 mmol/L sodium acetate-acetonitrile-methanol (1/2/2, v/v/v), respectively. The flow rate was set to 1.0 mL/min. 3.15. Electronic Nose Detection The response of volatile compounds was measured using an electronic nose (C...
The chromatographic separation conditions were: column temperature of 25 °C, a flow rate of 1 mL/min, mobile phase A comprising 75% acetonitrile + 25% methanol, and B containing 100% methyl tert-butyl ether (MTBE). The experiments were performed in triplicate. The quantitative analysis of ...
Plasma samples were slowly thawed at 4 °C, and from each sample a 100 μL aliquot was taken and added to 400 μL of a pre-cooled methanol/acetonitrile solution (1:1,v/v). Samples were then vortex mixed and maintained at −20 °C for 60 min followed by centrifugation at 14,000×...
600 cells L−1 in PUY), distributed between 6 and 14 m (Figure 6D). Strombidium, a putative prey for Dinophysis, was observed in both fjords, with higher densities in PIT (max. 2.2 × 103 cells L−1) after midday (Figure 6F). Some occasional overlapping of D. acuminata and ...