In this paper, we report the synthesis of pyrazolidine derivatives through a domino aza-Michael/hemiacetal sequence with chiral or achiral secondary amines as organocatalysts. Thus, a series of achiral pyrazolidine derivatives were obtained with good yields (up to 90%) and high diastereo...
The consequences of sub-lethal levels of ambient air pollution are underestimated for insects, for example, the accumulation of particulate matter on sensory receptors located on their antennae may have detrimental effects to their function. Here we show that the density of particulate matter on the...
The Oasis WCX Plus cartridges contain the Oasis WCX sorbent, which is a polymeric reversed-phase, weak ion exchange mixed-mode sorbent that has been optimized for fast, simple, and highly selective sample preparation of strong basic compounds and quaternary...
In: Hooper G (ed) Metabolism of amines in the brain. Macmillan, London, pp 38–47 Google Scholar Andersson K, Fuxe K, Agnati LF (1981 a) Effects of single injections of nicotine on the ascending dopamine pathways in the rat. Acta Physiol Scand 112: 345–347 Google Scholar Andersson...
Biogenic aminesRaw milk cheesesA total of 143 presumptive yeast isolates were obtained from the predominant microflora of 21 short-ripened starter-free raw cow's milk cheeses made in Galicia (NW Spain), and the following 68 isolates were identified by both genotyping and sequencing methods: ...
The above tertiary amines were expected to transiently generate EtIm-oligonucleotides or DMAP-oligonucleotides bearing preferentially 5′-terminal zwitterionic quaternary ammonium phosphate groups (EtIm⊕–PO2⊖–O-C5′ or DMAP⊕–PO2⊖–O-C5′) that would yield peptido-oligonucleotides upon their ...
Peroxide hydrogen can also oxidise halide ions (Cl-) to hypochlorous acid (HOCl), which is a strong oxidant that can react with amines producing chloramines, some of them being very toxic [18,19,20,21,22]. These radicals are commonly known as ROS (reactive oxygen species). Nevertheless ...
[28]: polymers; carbohydrates; carboxylic and acetic acids; amino acids; amines and amides. 2.5. DNA Extraction and Quantitative PCR Total genomic DNA was extracted after 48 h of exposure to the different scenarios established (0.25 g of soil; three replicates per condition) using a PureLink ...
Versions Notes Abstract In response to salt stress, cyanobacteria increases the gene expression of Na+/H+antiporter and K+uptake system proteins and subsequently accumulate compatible solutes. However, alterations in the concentrations of metabolic intermediates functionally related to the early stage of ...
The aldehyde products that can be obtained through “oxo-chemistry” are valuable products for the synthesis of bulk chemicals, e.g., alcohols, esters and amines, and depending on the application, linear [12,13] or branched [14] aldehydes are more preferred. From this perspective the need ...