scholarly journals Use of UPLC-ESI-MS/MS to quantitate free amino acid concentrations in micro-samples of mammalian milk

SpringerPlus ◽  
2013 ◽  
Vol 2 (1) ◽  
pp. 622 ◽  
Author(s):  
Véronique Roucher ◽  
Emmanuelle Desnots ◽  
Charlotte Naël ◽  
Aurore Agnoux ◽  
Marie-Cécile Alexandre-Gouabau ◽  
...  
Keyword(s):  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Esi Ms ◽  
Amino Acid Concentrations

Free amino acid concentrations in cerebral cortex of guinea pigs with epileptogenic lesions

1962 ◽  
Vol 5 (6) ◽  
pp. 525-532 ◽  
Author(s):  
Yo Aelony ◽  
John Logothetis ◽  
Bruce Bart ◽  
Frank Morrell ◽  
Magdaline Bovis
Keyword(s):  
Cerebral Cortex ◽  
Amino Acid ◽  
Free Amino Acid ◽  
Guinea Pigs ◽  
Free Amino ◽  
Amino Acid Concentrations

Variation in the free amino acid concentrations of the supralittoral rockpool copepod crustacean Tigriopus brevicornis during osmotic stress

2003 ◽  
Vol 83 (5) ◽  
pp. 921-922 ◽  
Author(s):  
Rob McAllen
Keyword(s):  
Amino Acid ◽  
Osmotic Stress ◽  
Free Amino Acid ◽  
Free Amino ◽  
Acclimation Period ◽  
Proline Concentration ◽  
Amino Acid Concentrations

Changes in the intracellular free amino acid (FAA) concentrations of Tigriopus brevicornis when subjected to hypoosmotic (5 psu), normal seawater (35 psu) and hyperosmotic (70 psu) conditions for a three day acclimation period were investigated. Proline, alanine and lysine were the major contributors to the intracellular FAA pool. Under hypoosmotic conditions, alanine was the dominant osmolyte with proline concentration at its lowest. This trend was reversed under hyperosmotic conditions. However, the total FAA pool was at its highest concentration under normal seawater conditions, with the total FAA concentrations being reduced during hypo- and hyper-osmotic conditions.

Effect of fertilization on free amino acid concentrations in black spruce and jack pine containerized seedlings

1987 ◽  
Vol 17 (1) ◽  
pp. 27-30 ◽  
Author(s):  
Y. T. Kim ◽  
C. Glerum ◽  
J. Stoddart ◽  
S. J. Colombo
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Free Amino Acid ◽  
Free Amino ◽  
Black Spruce ◽  
Jack Pine ◽  
Foliar Nitrogen ◽  
Containerized Seedlings ◽  
High Concentrations ◽  
Amino Acid Concentrations

Greenhouse-grown black spruce and jack pine container seedlings were fertilized weekly with a 20–8–20 fertilizer at four concentrations during the fall. Seedlings were sampled when 23 weeks old towards the end of the greenhouse cultural period to determine the effect of fertilization on the free amino acid concentrations. All amino acids, except tryptophan, showed significant increases in concentration with higher levels of fertilizer; the concentration of tryptophan decreased with increasing fertilizer concentration. Amino acids with the highest concentrations in black spruce were arginine, glutamic acid, and proline, while in jack pine, besides these three, aspartic acid and glutamine were also found in high concentrations. Black spruce had significantly higher amino acid concentrations than jack pine. The concentrations of certain free amino acids may be more sensitive indicators of seedling nitrogen status than total foliar nitrogen.

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