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A much more convenient method for the synthesis of β-phenethylamine is the reduction of ω-nitrostyrene by lithium aluminium hydride in ether, whose successful execution was first reported by R. F. Nystrom and W. G. Brown in 1948. [23] Phenethylamine can also be produced via the cathodic reduction of benzyl cyanide in a divided cell. [24]
This test can reveal elevated phenylalanine levels after one or two days of normal infant feeding. [11] [12] If a child is not diagnosed during the routine newborn screening test and a phenylalanine-restricted diet is not introduced, then phenylalanine levels in the blood will increase over time.
Phenylalanine concentrations are routinely screened in newborns by the neonatal heel prick (Guthrie test), which takes a few drops of blood from the heel of the infant. Standard phenylalanine concentrations in unaffected persons are about 2-6mg/dl (120–360 μmol/L) phenylalanine concentrations in those with untreated hyperphenylalaninemia can ...
Individuals with this disorder are known as "phenylketonurics" and must regulate their intake of phenylalanine. Phenylketonurics often use blood tests to monitor the amount of phenylalanine in their blood. Lab results may report phenylalanine levels using either mg/dL and μmol/L. One mg/dL of phenylalanine is approximately equivalent to 60 ...
2-Aminoacetophenone, also known as β-ketophenethylamine, α-desmethylcathinone, or phenacylamine, is a substituted phenethylamine derivative. [1] [2] It is the phenethylamine homologue of cathinone (β-ketoamphetamine) and hence is a parent compound of a large number of stimulant and entactogen drugs.
Besides affecting circulating catecholamine levels and increasing brain dopamine levels via MAO-B inhibition, selegiline strongly increases endogenous levels of β-phenethylamine, a major substrate of MAO-B. [13] Levels of β-phenethylamine in the brain are increased 10- to 30-fold and levels in urine are increased 20- to 90-fold.
Acid–base and blood gases are among the few blood constituents that exhibit substantial difference between arterial and venous values. [6] Still, pH, bicarbonate and base excess show a high level of inter-method reliability between arterial and venous tests, so arterial and venous values are roughly equivalent for these. [44]
α-Methylphenylalanine (α-MePhe or AMPA) is an artificial amino acid and a phenethylamine and amphetamine derivative. [1] It is the α-methylated analogue of phenylalanine, the precursor of the catecholamine neurotransmitters, and the amino acid analogue of amphetamine (α-methylphenethylamine), a psychostimulant and monoamine releasing agent.
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