Mechanistic Insights into the Role of Water in Backbone Dynamics of Native Collagen Protein by Natural Abundance15N NMR Spectroscopy

2016 ◽  
Vol 120 (17) ◽  
pp. 9393-9398 ◽  
Author(s):  
Chandan Singh ◽  
Neeraj Sinha
Keyword(s):  
Nmr Spectroscopy ◽  
Backbone Dynamics ◽  
Collagen Protein ◽  
Native Collagen

Role of Barium(II) in the Determination of the Absolute Configuration of Chiral Amines by1H NMR Spectroscopy

2006 ◽  
Vol 71 (3) ◽  
pp. 1119-1130 ◽  
Author(s):  
Rosa García ◽  
José M. Seco ◽  
Saulo A. Vázquez ◽  
Emilio Quiñoá ◽  
Ricardo Riguera
Keyword(s):  
Nmr Spectroscopy ◽  
Absolute Configuration ◽  
Chiral Amines ◽  
The Absolute

Backbone dynamics of bacteriorhodopsin as studied by 13 C solid-state NMR spectroscopy

2003 ◽  
Vol 32 (6) ◽  
pp. 578-584 ◽  
Author(s):  
Patrick Barr� ◽  
Satoru Yamaguchi ◽  
Hazime Sait� ◽  
Daniel Huster
Keyword(s):  
Solid State ◽  
Nmr Spectroscopy ◽  
Solid State Nmr ◽  
Backbone Dynamics ◽  
Solid State Nmr Spectroscopy

CERAMICS BASED ON ORGANOSILICON POLYMERS-PRECURSORS: MICROSTRUCTURE AND PROPERTIES (review). Part 2

2021 ◽  
pp. 22-32
Author(s):  
A.M. Shestakov ◽  
Keyword(s):  
Electron Microscopy ◽  
Nmr Spectroscopy ◽  
Material Properties ◽  
Structural Organization ◽  
Ceramic Materials ◽  
Special Role ◽  
Correct Interpretation ◽  
Instrumental Methods ◽  
Organosilicon Polymers

Shows the scientific approaches of various authors to the study of the microstructure of ceramics, the purpose of which is to elucidate its structural organization at the micro- and nanoscale, as well as the influence of the microstructure on the complex of material properties. Various instrumental methods for studying ceramics (NMR spectroscopy, electron microscopy, х-ray structural analysis, etc.) are considered, the permissible capabilities of research methods and analysis of the results obtained with their correct interpretation are shown. The special role of theoretical modeling in understanding the structure of the considered ceramic materials is noted.

Backbone Dynamics of the A-Domain of HMG1 As Studied by 15N NMR Spectroscopy

Biochemistry ◽  
1995 ◽  
Vol 34 (51) ◽  
pp. 16608-16617 ◽  
Author(s):  
R. William Broadhurst ◽  
Colin H. Hardman ◽  
Jean O. Thomas ◽  
Ernest D. Laue
Keyword(s):  
Nmr Spectroscopy ◽  
Backbone Dynamics ◽  
15N Nmr ◽  
15N Nmr Spectroscopy

9,10-Dinaphthylphenanthrene: Synthese, Rotationsisomerie und Photocyclisierung zu polycyclischen aromatischen Kohlenwasserstoffen9,10-Dinaphthylphenanthrenes: Synthesis, Rotational Isomers and Photocyclization to Polycyclic Aromatic Hydrocarbons

1992 ◽  
Vol 47 (12) ◽  
pp. 1764-1774 ◽  
Author(s):  
Karl-Dietrich Gundermann ◽  
Elke Romahn ◽  
Maximilian Zander
Keyword(s):  
Polycyclic Aromatic Hydrocarbons ◽  
Energy Transfer ◽  
Nmr Spectroscopy ◽  
Aromatic Hydrocarbons ◽  
Trans Isomers ◽  
Preparative Scale ◽  
Rotational Isomers ◽  
Polycyclic Aromatic

9,10-Di(1-naphthyl)phenanthrene (5 a) and 9,10-di(2-naphthyl)phenanthrene (5 b) have been synthesized. It is shown that 5 a and 5b both form two stable rotational (cis/trans) isomers with the naphthalene molecular planes perpendicular to the phenanthrene plane. In the case of 5 a the mixture of the two isomers has been separated in a preparative scale and each isomer characterized by e. g., NMR spectroscopy. Photocyclization of 5a leads to benzo[e]phenanthro[1,2,3,4-ghi]perylene (9) while 5 b yields phenanthro[9,10-i]pentahelicene (14); both hydrocarbons have not been previously described in the literature. The observed selectivities of photocyclization are explained on the basis of the structures and stabilities of the initially formed photoproducts (dihydro structures 15 and 14 a). The role of intramolecular non-radiative singlet-singlet energy transfer (naphthalene → phenanthrene) as competing with photocyclization is discussed in detail.

Recovery of contractility and pHi during respiratory acidosis in ferret hearts: role of Na(+)-H+ exchange

1990 ◽  
Vol 259 (3) ◽  
pp. H843-H848 ◽  
Author(s):  
H. E. Cingolani ◽  
Y. Koretsune ◽  
E. Marban
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Respiratory Acidosis ◽  
Partial Recovery ◽  
Mean Values ◽  
First Derivative ◽  
Cardiac Contractile ◽  
Developed Pressure

During acute respiratory acidosis, cardiac contractile pressure first drops but then recovers substantially. We investigated the mechanism of this response in isovolumic perfused ferret hearts. Developed pressure (DP) and its first derivative (dP/dt) were measured before, during, and after hypercapnia induced by equilibrating the perfusate with 15% CO2, rather than the 5% CO2 used in control. Intramyocardial pH (pHi) was measured by phosphorus nuclear magnetic resonance (NMR) spectroscopy. After the onset of hypercapnia (1-2 min), DP and +dP/dt reached minimal mean values of 37 +/- 2 and 39 +/- 3% of control, respectively. This early decline in myocardial contactility was followed by a partial recovery such that DP and +dP/dt had returned to 66 +/- 6 and 62 +/- 4% of control, respectively, by 14 min of hypercapnia. pHi fell from 7.17 +/- 0.01 in control to 6.88 +/- 0.11 after approximately 2 min of hypercapnia. Thereafter, pHi recovered linearly with a mean slope of 0.011 +/- 0.003 pH U/min. Ethylisopropylamiloride (10(-6) M), a blocker of Na(+)-H+ exchange, prevented the recovery of pHi during hypercapnia and attenuated the recovery of contractility by 40%. We conclude that the recovery of contractility during respiratory acidosis at least partially reflects an underlying recovery of pHi mediated by Na(+)-H+ exchange.

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