The extraction of catechin using supercritical CO2 is not possible, it only extracts traces of product, probably due to its polar nature.
The extraction of resveratrol using supercritical CO2 is not possible; it only extracts traces of product, probably due to its polar nature.
When di- tert-butyl dicarbonate (Boc2O) was used instead of DMDC to generate the corresponding mixed anhydride, only traces of product 3 a were found (entry 3).
Although the digold(i) complex 110 was identified as the resting state of the catalytic cycle, only traces of product 111 were obtained when this complex was used as the catalyst.
If it feels slippery, there are still some traces of product in your hair.
He has reddish-brown hair with a trace of product on top, a long fleshy nose, clear blue eyes, and fantastically white teeth.
Consequently, products were sampled on the basis of tracing of product deliveries to implicated shops.
Contrary to what Tso and Rabito assumed, a product that is certified "vegan" may not be completely free of traces of animal products.
In 1997, for example, after exterminators in Pascagoula, Miss., sprayed a powerful agricultural insecticide, methyl parathion -- which Dr. Jackson described as a "junior strength nerve agent" -- in hundreds of homes, experts at the federal laboratory huddled for four days and nights until they came up with a reliable urine test for traces of breakdown products of the chemical.
ESI-MS [M + H] = 1516.67 [C71H97N13O22S; exact mass: 1515.66 (calculated)] and HPLC traces of synthesis products and the purified peptides are provided in the Additional file 2, proving identity and purity of the AAZTA-MG bioconjugate.
