and spectra of Lewis acid-base adducts or donor-acceptor complexes, nor is it truly a textbook. Rather it is a cross between a retrospective essay and a current review. Its purpose is to explore the potential of the Lewis acid-base concepts as a systematizing tool in chemistry, and to d...
These represent amino acids that are either found in dissolved peptides/proteins or incorporated into abiotic (humicα) compounds. In the few studies of DCAAs in marine sediment pore waters (Caughey, 1982; Colombo et al., 1998; Lomstein et al., 1998; Pantoja and Lee, 1999); Burdige, ...
hler (1800–1882) and Justus von Liebig (1803–1873) prepared benzoic acid from oxidizing bitter almond oil (benzaldehyde) in 1832 and determined the formula for each of these compounds. They proposed that bitter almond oil, C7H6O, and benzoic acid were derivatives from the benzoyl radical, ...
A set of 543 ionizable commercial organic compounds with various acid/base functionalities and experimental octanol-water partitioning coefficients (log Kow) were obtained from the Canadian Domestic Substances List. Corresponding pH-dependent octanol-water distribution coefficients (log Dow) and air-water ...
Late-senescing genotypes, on the other hand, did not induce pro-senescence factors in response to environmental conditions in early- or mid-autumn, instead they showed enhanced SA levels (ABA, JA and phenolic compounds), antioxidant systems and expression of genes that can alleviate redox status ...
Peaks were selected according to the retention time and product ions of the commercially available standard compounds of NAD+, 13C-NAD+ and NADP+. For quantification of NAD+, 13C-NAD+ and NADP+, standard curves were generated with of 50, 75, 100, 300, 500, 750, 1000, 2000, 3000, ...
solid carboxylic acids. Insoluble carboxylic acids react with solutions of cyanides to cause the release of gaseous hydrogen cyanide. Flammable and/or toxic gases and heat are generated by the reaction of carboxylic acids with diazo compounds, dithiocarbamates, isocyanates, mercaptans, nitrides, and ...
It can quantify diverse compounds and distinguish between the active pharmaceutical ingredient and its degradation products [23]. Here, we standardized a reverse phase HPLC method to study the stability of CLEFMA as a potential active pharmaceutical ingredient in an anticancer drug-product. As defined...
pyrimidine and other nitrogenous compounds in the transformation of metabolites; Or deamination produces α-ketoacid and NH3. According to different enzymes and pathways, α-ketoacid can produce keto bodies, or participate in oxidative energy supply or sugar and lipid synthesis; NH3 enters the urea cy...
Synthetic procedures, NMR spectra and characterization data for all the new compounds are available within this article and its Supplementary Information. The X-ray crystallographic coordinates for the structure reported in this article have been deposited at the Cambridge Crystallographic Data Centre (CCDC...