Temperature effects on the IR spectra of crystalline amino acids, dipeptides, and polyamino acids. II. L-and DL-serines

2008 ◽  
Vol 49 (4) ◽  
pp. 627-638 ◽  
Author(s):  
Yu. A. Chesalov ◽  
G. B. Chernobay ◽  
E. V. Boldyreva
Keyword(s):  
Amino Acids ◽  
Ir Spectra ◽  
Temperature Effects ◽  
Crystalline Amino Acids

Temperature effects on the IR spectra of crystalliine amino acids, dipeptides, and polyamino acids. I. Glycine

2007 ◽  
Vol 48 (2) ◽  
pp. 332-339 ◽  
Author(s):  
G. B. Chernobai ◽  
Yu. A. Chesalov ◽  
E. B. Burgina ◽  
T. N. Drebushchak ◽  
E. V. Boldyreva
Keyword(s):  
Amino Acids ◽  
Ir Spectra ◽  
Temperature Effects

Compensation of the requirement for protein in parenteral diet choice of the solutions of crystalline amino acids and protein hydrolysates

1993 ◽  
Vol 74 (5) ◽  
pp. 334-338
Author(s):  
E. I. Ustinov
Keyword(s):  
Amino Acids ◽  
Protein Hydrolysates ◽  
Utilization Rate ◽  
Mathematical Treatment ◽  
Diet Choice ◽  
Volume Calculation ◽  
Crystalline Amino Acids ◽  
Qualitative Estimation

The formula of volume calculation of all the solutions of crystalline amino acids and some protein hydrolysates to compensate the necessary requirements of a patient for protein is given. The mathematical treatment of this formula with regard to the utilization rate and maximum doses of amino acids is made, the method of quantitative and qualitative estimation of the available preparations of crystalline amino acids and protein hydrolysates allowing to make a justified choice of the preparations is proposed. The article is illustrated by the tables with necessary information of the preparations for parenteral diet, their potential possibilities of protein compensation as well as a dosage of the preparations of crystalline amino acids and protein hydrolysates to compensate the necessary require# ments for protein.

NUTRITION DES LARVES DE TRIBOLIUM CONFUSUM DUVAL: I. RECHERCHE D'UN RÉGIME SYNTHÉTIQUE BASAL SATISFAISANT LEURS BESOINS NUTRITIFS

1951 ◽  
Vol 29 (2) ◽  
pp. 71-79 ◽  
Author(s):  
A. Lemonde ◽  
R. Bernard
Keyword(s):  
Amino Acids ◽  
Wheat Germ ◽  
Amino Acid Mixture ◽  
Tribolium Confusum ◽  
Acid Mixture ◽  
Salt Mixture ◽  
Wheat Germ Oil ◽  
Crystalline Amino Acids ◽  
Vitamin Mixture ◽  
Liver Fraction

A purified diet suitable for the study of the qualitative amino acids requirements of the larvae of the Coleoptera Tribolium confusum is presented. The composition of the diet is as follows: amino acid mixture 20%, cornstarch 75.5%, cholesterol 1%, wheat germ oil 1.5%, salt mixture No. 2 U.S.P. XII 2%, yeast 0.5%, vitamin mixture M.V.–II. In presence of amino acids, glucose cannot be used as a source of hydrocarbon. The mixture is very hygroscopic, develops a brown color, and is apparently toxic to the larvae. The importance of choline as a growth factor is demonstrated. Wilson's Liver Fraction L or Liver Concentrate 1: 20 cannot replace this vitamin. Yeast appears to contain unknown factors for it improves growth when added to a diet already supplemented with vitamins known to be essential for the larvae. A mixture of 19 crystalline amino acids known to occur in casein satisfies the nitrogen requirements of the larvae of T. confusum equally as well as purified casein.

Application of FT-IR Spectrometry to Determine the Global Metabolic Adaptations to Physical Conditioning in Sportsmen

2002 ◽  
Vol 56 (10) ◽  
pp. 1259-1267 ◽  
Author(s):  
Cyril Petibois ◽  
Georges Cazorla ◽  
André Cassaigne ◽  
Gérard Déléris
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Ir Spectra ◽  
Plasma Concentrations ◽  
Physical Conditioning ◽  
Ir Spectrometry ◽  
Metabolic Adaptations ◽  
Spectral Area ◽  
Ft Ir

Global metabolic adaptations to physical conditioning were described in 15 subjects by FT-IR spectrometry as the method allowed determination of glucose (Glc), lactate (La), glycerol, triglycerides (TG), fatty acyl moieties (FAM), and total amino acids plasma concentrations. Subtraction of plasma FT-IR spectra obtained at resting state from the exercise spectra also allowed determination of the biomolecular response to exercise. On week 1, exercise induced a transient hypoglycemia, a lactatemia increase of 153%, a FAM depletion of 27%, and a TG concentration decrease of 28%. Protein contents increased by 2%, but these were partly catabolized for amino acid supply (+27%), suggesting an important metabolic stress during exercise. On week 3, exercise hypoglycemia had disappeared, lactate increase was diminished by 91%, TG contents were decreased by 14%, and proteins and amino acids exhibited higher absorption increases. On week 5, TG and FAM concentrations were markedly increased during exercise, protein absorption was still increased (+9%), but amino acid blood release was diminished by 81%. These results described positive adaptations to training. Furthermore, FAM concentration could be determined from plasma FT-IR spectra by using the 2996–2819 cm−1 spectral area [ νas(CH3), νas(CH2), νs(CH3), and νs(CH2) absorbance; 0.82 mMol·L−1, a.u. cm−1], as well as for amino acid concentration by using the ν(COO−) spectral area (1430–1360 cm−1; 0.062 g·L−1, a.u. × cm−1). FT-IR spectrometry was useful to determine simultaneously various plasma concentrations and most of the biomolecular changes through successive samples.

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