Retracted: Molecular Motions and Interactions in Aqueous Solutions of Thymosin‐β 4 , Stabilin C‐Terminal Domain (CTD) and Their 1:1 Complex Studied by 1 H NMR Spectroscopy

ChemPhysChem ◽  
2018 ◽  
Vol 19 (7) ◽  
pp. 848-856 ◽  
Author(s):  
Mónika Bokor ◽  
Ágnes Tantos ◽  
Attila Mészáros ◽  
Bence Jenei ◽  
Réka Haminda ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Molecular Motions ◽  
H Nmr ◽  
Terminal Domain

scholarly journals Retraction: Molecular Motions and Interactions in Aqueous Solutions of Thymosin‐β 4 , Stabilin C‐Terminal Domain (CTD) and Their 1:1 Complex Studied by 1 H NMR Spectroscopy

ChemPhysChem ◽  
2020 ◽  
Vol 21 (9) ◽  
pp. 958-958
Author(s):  
Mónika Bokor ◽  
Ágnes Tantos ◽  
Attila Mészáros ◽  
Bence Jenei ◽  
Réka Haminda ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Molecular Motions ◽  
H Nmr ◽  
Terminal Domain

Molecular Motions and Interactions in Aqueous Solutions of Thymosin‐β 4 , Stabilin CTD and Their 1 : 1 Complex, Studied by 1 H‐NMR Spectroscopy

ChemPhysChem ◽  
2020 ◽  
Vol 21 (13) ◽  
pp. 1420-1428
Author(s):  
M. Bokor ◽  
Á. Tantos ◽  
A. Mészáros ◽  
B. Jenei ◽  
R. Haminda ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Molecular Motions ◽  
H Nmr

Optical activity of D-glyceraldehyde in aqueous solutions

1984 ◽  
Vol 49 (5) ◽  
pp. 1167-1172 ◽  
Author(s):  
Michal Fedoroňko
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Optical Activity ◽  
Equilibrium Mixture ◽  
Specific Rotation ◽  
Temperature Range ◽  
H Nmr ◽  
Dilute Aqueous Solutions

In dilute aqueous solutions, D-glyceraldehyde exists both in the free and hydrated monomeric forms; the equilibrium between them depends on the temperature. The specific rotation of the equilibrium mixture was measured polarimetrically in the temperature range from 20 to 80 °C, the concentrations of both forms being determined by 1H NMR spectroscopy. From these data, the specific rotations of both forms of D-glyceraldehyde in the indicated temperature range were calculated.

scholarly journals Nanosilica A-300 influence on water structures formed on the bioactive agent Enoxil

2016 ◽  
Vol 94 (1) ◽  
pp. 88-94 ◽  
Author(s):  
Vladimir V. Turov ◽  
Tudor Lupascu ◽  
Tatyana V. Krupska ◽  
Igor Povar
Keyword(s):  
Nmr Spectroscopy ◽  
Low Temperature ◽  
Aqueous Solutions ◽  
Composite System ◽  
H Nmr ◽  
Concentrated Solution ◽  
Bioactive Agent

The interactions of water and aqueous solutions of HCl with the Enoxil preparation and its composite system Enoxil–SiO2 (1:1) have been studied by low-temperature 1H NMR spectroscopy. The antacid properties in the preparation, manifested in the transformation of a concentrated solution of HCl in a weakly concentrated one, have been established. In the composite system, adsorbed HCl in a hydrophobic environment of CDCl3 may generate a system of clusters with different acid concentrations, while the equilibrium is shifted toward less concentrated forms.

Hydrolysis of ethylenediphosphinetetraacetate anions

1983 ◽  
Vol 48 (6) ◽  
pp. 1552-1557
Author(s):  
Jana Podlahová ◽  
Jaroslav Podlaha
Keyword(s):  
Nmr Spectroscopy ◽  
Aqueous Solutions ◽  
Stability Of Solutions ◽  
Laboratory Temperature ◽  
H Nmr ◽  
Isolation And Characterization ◽  
Acid And Base ◽  
The Stability ◽  
Hydrolysis Of

The anions of ethylenediphosphinetetraacetic acid are hydrolyzed in aqueous solutions at 80 °C in the two following reactions: ((OOCCH2)2PCH2CH2P(CH2COO)2)4- → (OOCCH2(O)HPCH2CH2PH(O)CH2COO)2- → (O(O)HPCH2CH2PH(O)O)2-. Both reactions are acid and base catalyzed so that, at pH < 12, the first reaction is much faster than the second. The reaction course was studied by 1H NMR spectroscopy and by isolation and characterization of the products. The effect of both reactions on the stability of solutions of ethylenediphosphinetetraacetic acid and their salts is negligible at laboratory temperature.

Conformational study on ribonucleoside O-phosphonylmethyl derivatives by 1H NMR spectroscopy

1985 ◽  
Vol 50 (8) ◽  
pp. 1899-1905 ◽  
Author(s):  
Milena Masojídková ◽  
Jaroslav Zajíček ◽  
Miloš Buděšínský ◽  
Ivan Rosenberg ◽  
Antonín Holý
Keyword(s):  
Nmr Spectroscopy ◽  
1H Nmr ◽  
1H Nmr Spectroscopy ◽  
Conformational Study ◽  
H Nmr ◽  
Conformational Properties

Conformational properties of ribonucleoside 5'-O-phosphonylmethyl derivatives have been determined by 1H NMR spectroscopy and compared with those of natural nucleosides and 5'-nucleotides.

Monitoring the encapsulation of chlorin e6 derivatives into polymer carriers by NMR spectroscopy

2019 ◽  
Vol 23 (11n12) ◽  
pp. 1576-1586 ◽  
Author(s):  
Sara Pfister ◽  
Luca Sauser ◽  
Ilche Gjuroski ◽  
Julien Furrer ◽  
Martina Vermathen
Keyword(s):  
Relaxation Time ◽  
Nmr Spectroscopy ◽  
Core Region ◽  
Chlorin E6 ◽  
Polypropylene Glycol ◽  
Polymer Carriers ◽  
H Nmr ◽  
Line Shape Analysis ◽  
Dynamic Methods ◽  
Derivatives Of

The encapsulation of five derivatives of chlorin e6 with different hydrophobicity and aggregation properties into a series of five poloxamer-type triblock copolymer micelles (BCMs) with varying numbers of polyethylene and polypropylene glycol (PEG, PPG) units was monitored using 1H NMR spectroscopy. NMR chemical shift and line shape analysis, as well as dynamic methods including diffusion ordered spectroscopy (DOSY) and T1 and T2 relaxation time measurements of the chlorin and the polymer resonances, proved useful to assess the chlorin–BCM compatibility. The poloxamers had high capability to break up aggregates formed by chlorins up to intermediate hydrophobicity. Physically entrapped chlorins were always localized in the BCM core region. The loading capacity correlated with chlorin polarity for all poloxamers among which those with the lowest number of PPG units were most efficient. DOSY data revealed that relatively weakly aggregating chlorins partition between the aqueous bulk and micellar environment whereas more hydrophobic chlorins are well retained in the BCM core region, rendering these systems more stable. T1 and T2 relaxation time measurements indicated that motional freedom in the BCM core region contributes to encapsulation efficiency. The BCM corona dynamics were rather insensitive towards chlorin entrapment except for the poloxamers with short PEG chains. The presented data demonstrate that 1H NMR spectroscopy is a powerful complementary tool for probing the compatibility of porphyrinic compounds with polymeric carriers such as poloxamer BCMs, which is a prerequisite in the development of stable and highly efficient drug delivery systems suitable for medical applications like photodynamic therapy of tumors.

Different submicellar solubilization mechanisms revealed by 1H NMR and 2D diffusion ordered spectroscopy (DOSY)

2020 ◽  
Vol 22 (19) ◽  
pp. 11075-11085
Author(s):  
Mengjian Wu ◽  
Zhaoxia Wu ◽  
Shangwu Ding ◽  
Zhong Chen ◽  
Xiaohong Cui
Keyword(s):  
Nmr Spectroscopy ◽  
Sodium Dodecyl Sulfate ◽  
1H Nmr ◽  
Sodium Dodecyl ◽  
Butyl Methacrylate ◽  
H Nmr ◽  
Molecular Scale ◽  
Two Systems ◽  
Dodecyl Sulfate ◽  
Triton X

Different submicellar solubilization mechanisms of two systems, Triton X-100/tetradecane and sodium dodecyl sulfate (SDS)/butyl methacrylate, are revealed on the molecular scale by 1H NMR spectroscopy and 2D diffusion ordered spectroscopy (DOSY).

scholarly journals Tautomerisation in 1-(4-Methylphenylazo)naphthalen-2-ol and 2-(4-Methylphenylazo)-4-methylphenol: A Crystallographic and 13C{1H}NMR Study

1999 ◽  
Vol 23 (3) ◽  
pp. 178-179
Author(s):  
Wendy I. Cross ◽  
Kevin R. Flower ◽  
Robin G. Pritchard
Keyword(s):  
Acetic Acid ◽  
Nmr Spectroscopy ◽  
Resonant Frequency ◽  
X Ray Diffraction ◽  
X Ray ◽  
H Nmr ◽  
Nmr Study ◽  
Acetic Acid Esters ◽  
Acid Esters ◽  
Equivalent Carbon

The acetic acid esters of 1-(4-methylphenylazo)naphthalen-2-ol 1 and 2-(4-methylphenylazo)-4-methylphenol 3 are prepared and characterised by single crystal X-ray diffraction studies and 13C{1H}NMR spectroscopy; the position of the C(2)13C resonance for the ester is used to predict the position of resonant frequency of the equivalent carbon in the parent alcohols and hence, calculate the position of the azo-hydrazone equilibrium in these compounds.

3-Hydroxy Retinal, a New Chromophore Identified in Insect Eyes: HPLC Separation and NMR Spectroscopic Identification of the Oxime Forms

1988 ◽  
Vol 43 (5-6) ◽  
pp. 473-475 ◽  
Author(s):  
Wolfgang Gärtner ◽  
Anette Plangger
Keyword(s):  
Nmr Spectroscopy ◽  
Separation System ◽  
Hplc Separation ◽  
H Nmr ◽  
Spectroscopic Identification

3-Hydroxy retinal acts as visual chromophore instead of retinal in the eyes of several insect orders. A HPLC separation system of the aldehyde and oxime isomers and their identification by 400 MHz 1H NMR spectroscopy is described.

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