scholarly journals Dynamical Properties of van der Waals Clusters of Amino-acid Tryptophan Molecule.

1996 ◽  
Vol 44 (2) ◽  
pp. 229-236
Author(s):  
Hisayuki YAZAWA ◽  
Ryoichi SHISHIDO ◽  
Takashi NOZAWA ◽  
Tatsuo ARIKAWA
Keyword(s):  
Amino Acid ◽  
Van Der Waals ◽  
Van Der Waals Clusters ◽  
Dynamical Properties ◽  
Amino Acid Tryptophan ◽  
Tryptophan Molecule

Structural and dynamical properties of van der Waals clusters with impurities

1989 ◽  
Vol 158 (6) ◽  
pp. 525-530 ◽  
Author(s):  
I.L. Garzón ◽  
X.P. Long ◽  
R. Kawai ◽  
J.H. Weare
Keyword(s):  
Van Der Waals ◽  
Van Der Waals Clusters ◽  
Dynamical Properties

Dietary intake of tryptophan tied emotion-related impulsivity in humans

2019 ◽  
pp. 1-8 ◽  
Author(s):  
Florian Javelle ◽  
Descartes Li ◽  
Philipp Zimmer ◽  
Sheri L. Johnson
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Food Intake ◽  
Essential Amino Acid ◽  
Food Habits ◽  
Psychological Disorder ◽  
Serotonin Synthesis ◽  
Amino Acid Tryptophan ◽  
Pass Through ◽  
Three Factor

Abstract. Emotion-related impulsivity, defined as the tendency to say or do things that one later regret during periods of heightened emotion, has been tied to a broad range of psychopathologies. Previous work has suggested that emotion-related impulsivity is tied to an impaired function of the serotonergic system. Central serotonin synthesis relies on the intake of the essential amino acid, tryptophan and its ability to pass through the blood brain barrier. Objective: The aim of this study was to determine the association between emotion-related impulsivity and tryptophan intake. Methods: Undergraduate participants (N = 25, 16 women, 9 men) completed a self-rated measure of impulsivity (Three Factor Impulsivity Index, TFI) and daily logs of their food intake and exercise. These data were coded using the software NutriNote to evaluate intakes of tryptophan, large neutral amino acids, vitamins B6/B12, and exercise. Results: Correlational analyses indicated that higher tryptophan intake was associated with significantly lower scores on two out of three subscales of the TFI, Pervasive Influence of Feelings scores r =  –.502, p < . 010, and (lack-of) Follow-Through scores, r =  –.407, p < . 050. Conclusion: Findings provide further evidence that emotion-related impulsivity is correlated to serotonergic indices, even when considering only food habits. It also suggests the need for more research on whether tryptophan supplements might be beneficial for impulsive persons suffering from a psychological disorder.

Highly specific “sensing” of tryptophan by a luminescent europium(III) complex

2016 ◽  
Vol 71 (10) ◽  
pp. 1025-1028 ◽  
Author(s):  
Jan A. Stubenrauch ◽  
Christian Mevissen ◽  
Marie F. Schulte ◽  
Steffen Bochenek ◽  
Markus Albrecht ◽  
...  
Keyword(s):  
Amino Acid ◽  
Europium Complex ◽  
Phenanthroline Ligand ◽  
Amino Acid Tryptophan ◽  
Tryptophan Emission

AbstractThe europium(III) complex 1-Cl3 (S,S-2,2′-(((1,10-phenanthroline-2,9-diyl)bis(methanylylidene))bis(azanylylidene))bis(3-methylbutanamide)europiumtrichloride) undergoes, only in the presence of the amino acid tryptophan, a change of emission at 615 nm. In the presence of few equivalents of tryptophan, emission of the europium complex is enhanced while it disappears upon addition of large amounts. This behavior can be assigned to displacement of the sensitizing phenanthroline ligand of 1-Cl2•Trp in the latter case.

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