scholarly journals Renewable pyridinium ionic liquids from the continuous hydrothermal decarboxylation of furfural-amino acid derived pyridinium zwitterions

2015 ◽  
Vol 17 (8) ◽  
pp. 4151-4156 ◽  
Author(s):  
Sarah Kirchhecker ◽  
Steffen Tröger-Müller ◽  
Sebastian Bake ◽  
Markus Antonietti ◽  
Andreas Taubert ◽  
...  
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid

Fully renewable pyridinium ionic liquids were synthesised via the hydrothermal decarboxylation of pyridinium zwitterions derived from furfural and amino acids in flow.

scholarly journals The Relationship between the Structure and Properties of Amino Acid Ionic Liquids

Molecules ◽  
2019 ◽  
Vol 24 (18) ◽  
pp. 3252 ◽  
Author(s):  
Paula Ossowicz ◽  
Joanna Klebeko ◽  
Barbara Roman ◽  
Ewa Janus ◽  
Zbigniew Rozwadowski
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Surface Activity ◽  
Spectroscopic Properties ◽  
Specific Rotation ◽  
Structure And Properties ◽  
Rotation Surface ◽  
Cation Type ◽  
The Relationship

Ionic liquids based on different l-amino acids (glycine, l-valine, l-leucine, l-isoleucine, l-histidine, l-methionine, l-tyrosine, l-tryptophan, l-arginine, and l-threonine) and different cations (tetrabutylammonium (TBA), tributylmethylammonium (tBMA), didecyldimethylammonium (DDA), (2-hydroxyethyl)trimethylammonium (choline) (Chol), alkyl(C12-C14) dimethylbenzylammonium (benzalkonium) (BA), dodecyltrimethylammonium (DDTMA), hexadecyltrimethylammonium (HDTMA), octadecyltrimethylammonium (ODTMA) and 1-ethyl-3-methylimidazolium (EMIM)) have been synthesized and characterized by NMR and FTIR. Viscosity, specific rotation, surface activity, thermal stability (TG), and phase transformations (DSC) have been determined and compared with available data. Furthermore, benzalkonium, didecyldimethylammonium, dodecyltrimethylammonium, hexadecyltrimethylammonium, and octadecyltrimethylammonium amino acid ionic liquids have been shown to exhibit surface activity. The dissolution of cellulose in amino acid ionic liquids (AAILs) composed of various cations was also investigated. Cellulose was only dissolved in EMIM salts of amino acids. In particular, the influence of the cation type on selected physicochemical and spectroscopic properties were discussed. The article is a mini review on amino acid ionic liquids.

Microwave-assisted one pot-synthesis of amino acid ionic liquids in water: simple catalysts for styrene carbonate synthesis under atmospheric pressure of CO2

2014 ◽  
Vol 4 (4) ◽  
pp. 963-970 ◽  
Author(s):  
Kuruppathparambil Roshith Roshan ◽  
Tharun Jose ◽  
Dongwoo Kim ◽  
Kathalikkattil Amal Cherian ◽  
Dae Won Park
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Atmospheric Pressure ◽  
Microwave Energy ◽  
One Pot ◽  
Microwave Assisted ◽  
One Pot Synthesis ◽  
Styrene Carbonate

A novel variety of ionic liquids based on amino acids is synthesized in water using microwave energy.

scholarly journals Intrinsic MRI contrast from amino acid-based paramagnetic ionic liquids

2020 ◽  
Vol 1 (6) ◽  
pp. 1980-1987
Author(s):  
Praveen Singh Gehlot ◽  
Hariom Gupta ◽  
Mangal Singh Rathore ◽  
Kusum Khatri ◽  
Arvind Kumar
Keyword(s):  
Magnetic Resonance Imaging ◽  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Magnetic Resonance ◽  
Resonance Imaging ◽  
Dual Mode ◽  
Mri Contrast ◽  
Magnetic Resonance Imaging Mri ◽  
Natural Amino Acids

Paramagnetic ionic liquids (PMILs) comprising of natural amino acids and tetrachloroferrate(iii) as constituent ions were prepared that act as highly efficient dual mode (T1 and T2) responsive contrast agents for magnetic resonance imaging (MRI).

Reversible systems based on CO2, amino-acids and organic superbases

RSC Advances ◽  
2015 ◽  
Vol 5 (45) ◽  
pp. 35564-35571 ◽  
Author(s):  
Gonçalo V. S. M. Carrera ◽  
Noémi Jordão ◽  
Miguel M. Santos ◽  
Manuel Nunes da Ponte ◽  
Luís C. Branco
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Molten Salts ◽  
Reversible Systems ◽  
Chiral Amino Acids

Chiral amino-acids in the presence of an organic superbase in a CO2 atmosphere were used to prepare carbamate-based ionic liquids and molten salts. Variation of the superbase and amino acid R-group gave tuneable CO2 release temperatures from the products.

scholarly journals Amino acid-based ionic liquids as precursors for the synthesis of chiral nanoporous carbons

2019 ◽  
Vol 1 (12) ◽  
pp. 4981-4988 ◽  
Author(s):  
Sapir Shekef Aloni ◽  
Milena Perovic ◽  
Michal Weitman ◽  
Reut Cohen ◽  
Martin Oschatz ◽  
...  
Keyword(s):  
Amino Acids ◽  
Ionic Liquids ◽  
Amino Acid ◽  
Nanoporous Carbons ◽  
Chiral Ionic Liquids

The synthesis of chiral nanoporous carbons based on chiral ionic liquids (CILs) of amino acids as precursors is described.

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.

Purification of Antihemophilic Factor (Factor VIII) by Amino Acid Precipitation*

1964 ◽  
Vol 11 (01) ◽  
pp. 064-074 ◽  
Author(s):  
Robert H Wagner ◽  
William D McLester ◽  
Marion Smith ◽  
K. M Brinkhous
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Factor Viii ◽  
Plasma Protein ◽  
Acid Precipitation ◽  
Aminobutyric Acid ◽  
Gamma Aminobutyric Acid ◽  
Specific Procedure ◽  
Beta Alanine ◽  
Antihemophilic Factor

Summary1. The use of several amino acids, glycine, alpha-aminobutyric acid, alanine, beta-alanine, and gamma-aminobutyric acid, as plasma protein precipitants is described.2. A specific procedure is detailed for the preparation of canine antihemophilic factor (AHF, Factor VIII) in which glycine, beta-alanine, and gammaaminobutyric acid serve as the protein precipitants.3. Preliminary results are reported for the precipitation of bovine and human AHF with amino acids.

Complete Covalent Structure of Human Platelet Factor 4

1979 ◽  
Vol 42 (05) ◽  
pp. 1652-1660 ◽  
Author(s):  
Francis J Morgan ◽  
Geoffrey S Begg ◽  
Colin N Chesterman
Keyword(s):  
Amino Acids ◽  
Molecular Weight ◽  
Amino Acid ◽  
Amino Acid Sequence ◽  
Human Platelet ◽  
Platelet Factor 4 ◽  
Platelet Factor ◽  
Disulphide Bonds ◽  
Covalent Structure

SummaryThe amino acid sequence of the subunit of human platelet factor 4 has been determined. Human platelet factor 4 consists of identical subunits containing 70 amino acids, each with a molecular weight of 7,756. The molecule contains no methionine, phenylalanine or tryptophan. The proposed amino acid sequence of PF4 is: Glu-Ala-Glu-Glu-Asp-Gly-Asp-Leu-Gln-Cys-Leu-Cys-Val-Lys-Thr-Thr-Ser- Gln-Val-Arg-Pro-Arg-His-Ile-Thr-Ser-Leu-Glu-Val-Ile-Lys-Ala-Gly-Pro-His-Cys-Pro-Thr-Ala-Gin- Leu-Ile-Ala-Thr-Leu-Lys-Asn-Gly-Arg-Lys-Ile-Cys-Leu-Asp-Leu-Gln-Ala-Pro-Leu-Tyr-Lys-Lys- Ile-Ile-Lys-Lys-Leu-Leu-Glu-Ser. From consideration of the homology with p-thromboglobulin, disulphide bonds between residues 10 and 36 and between residues 12 and 52 can be inferred.

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