On Wednesday, TFAA
'president' Dr Mahboob Hussain along with other members of the 'newly formed' ASA body visited different departments of the Punjab University, including the Old Campus, to ask the faculty members to participate in the general body meeting of the ASA.
had rejected the cancellation of the elections by declaring that the step was taken without consulting them and vowed to hold election on March 13.
In presence of 150 mm NaCl and in leaves of -NB and +NB plants, increases in TFAA concentration of 140 and 95%, respectively, were observed in relation to their controls (Table 4).
It is also possible that increases in the levels of PRO, since they are also a TFAA, are also a consequence of an increase in protein catabolism (Silveira et al.
In this study, DMDCS, TMCS, AA, and TFAA were investigated for their effectiveness as derivatizing agents of 9-hydroxyphenanthrene for SPME with GC-MS analysis.
The 9-hydroxyphenanthrene derivatized with the TFAA reagent shows a single peak on the total ion chromatogram (Fig.
Both N,O-bis(trimethylsilyl)trifluoroacetamide with trimethylchlorosilane and TFAA derivatization in El were evaluated and provided lower sensitivity than NICI with the TFAA derivative.
9]-tetrahydrocannabinol; GC/MS, gas chromatography-mass spectrometry; EI, electron impact ionization; LOQ, limit of quantification; SAMHSA, Substance Abuse and Mental Health Services Administration; NICI, negative ion chemical ionization; SPE, solid-phase extraction; TFAA, trifluoroacetic anhydride; QC, quality control; and LOD, limit of detection.
05 8 (a) TCA, trichloroacetic acid; PCA, perchloric acid; TAP, trial kylphosphine; DTT, dithiothreitol; AX, Bio-Rad AG-MP-1 AX resin (sample clean up); TFAA
, N-methyl-N-(t butyldimethylsilyl)-trifluoroacetamide.
8%) denoted as THF and trifluoroacetic anhydride (>99%) denoted as TFAA
were purchased from Acros Organics.
An ozone-treated LDPE film was treated with TFAA
in the gas phase and studied by ESCA.
Etching of these samples with TFAA
indicates that the size of the K161 phase is on the order of 5-25 [[micro]meter] with good dispersion, in both the catalyzed and uncatalyzed blends.