Illumination-Induced Changes in Methylammonium Lead Bromine Perovskites. An In Situ 2H NMR Study

2021 ◽  
Author(s):  
Wen-Cheng Qiao ◽  
Jiaqi Liang ◽  
Wei Dong ◽  
Kaiyang Ma ◽  
Xue Lu Wang ◽  
...  
Keyword(s):  
2H Nmr ◽  
Nmr Study ◽  
Induced Changes

ChemInform Abstract: A 2H NMR Study of the Formation of Ethylidyne from Acetylene and Hydrogen Coadsorbed on Pt.

ChemInform ◽  
2010 ◽  
Vol 22 (25) ◽  
pp. no-no
Author(s):  
C. A. KLUG ◽  
C. P. SLICHTER ◽  
J. H. SINFELT
Keyword(s):  
2H Nmr ◽  
Nmr Study

scholarly journals In Vivo 2H-NMR Study of the Action of Antibacterial Agents on Escherichia Coli Membranes

2011 ◽  
Vol 100 (3) ◽  
pp. 627a
Author(s):  
Catherine Tardy-Laporte ◽  
Alexandre A. Arnold ◽  
Isabelle Marcotte
Keyword(s):  
Escherichia Coli ◽  
Antibacterial Agents ◽  
2H Nmr ◽  
Nmr Study

In Situ XAFS and NMR Study of Rhodium-Catalyzed Dehydrogenation of Dimethylamine Borane

2005 ◽  
Vol 127 (10) ◽  
pp. 3254-3255 ◽  
Author(s):  
Yongsheng Chen ◽  
John L. Fulton ◽  
John C. Linehan ◽  
Tom Autrey
Keyword(s):  
Nmr Study ◽  
In Situ Xafs ◽  
Dimethylamine Borane

2H‐NMR study of the glass transition in supercooled ortho‐terphenyl

1988 ◽  
Vol 88 (4) ◽  
pp. 2139-2147 ◽  
Author(s):  
Th. Dries ◽  
F. Fujara ◽  
M. Kiebel ◽  
E. Rössler ◽  
H. Sillescu
Keyword(s):  
Glass Transition ◽  
2H Nmr ◽  
Nmr Study

Rhythm effects on contractility of the beating isovolumic left ventricle

1960 ◽  
Vol 199 (6) ◽  
pp. 1115-1120 ◽  
Author(s):  
B. Lendrum ◽  
H. Feinberg ◽  
E. Boyd ◽  
L. N. Katz
Keyword(s):  
Heart Rate ◽  
Left Ventricle ◽  
Systolic Pressure ◽  
Ventricular Volume ◽  
Contractile Force ◽  
Postextrasystolic Potentiation ◽  
Pressure Development ◽  
Induced Changes ◽  
Electrical Alternans

Variation in contractile force of the isovolumic contracting left ventricle of the dog was studied in open-chested in situ hearts. The electrocardiogram and intraventricular pressures were recorded at various heart volumes. Spontaneous changes in heart rate and rhythm occurred at all volumes. Isovolumic systolic pressure development (contractile force) varied with rate and rhythm. Contractile force increased with heart rate (treppe) regardless of pacemaker origin. When a premature beat was followed by a compensatory pause, the premature beat showed a decrease and the next beat an increase in contractile force (postextrasystolic potentiation). The magnitude of the changes varied directly with the prematurity of the beat. Mechanical alternans was observed with electrical alternans, despite the absence of significant volume change. Rate-induced changes, postextrasystolic potentiation and mechanical alternans were additive when they occurred simultaneously. For practical purposes, ventricular volume (filling), hence muscle fiber length, remained constant during these rate and rhythm change, therefore could not affect the strength of contraction. Contractile force changes directly attributable to rate and rhythm changes do, therefore, occur in the intact mammalian heart.

Kinetics of alkali ion exchange of irradiated glasses

2003 ◽  
Vol 792 ◽  
Author(s):  
Michael I. Ojovan ◽  
William E. Lee
Keyword(s):  
Ion Exchange ◽  
External Irradiation ◽  
Glass Temperature ◽  
Ion Exchange Kinetics ◽  
Radiation Induced ◽  
Exchange Kinetics ◽  
Induced Changes ◽  
Kinetics Of ◽  
Alkali Ion

ABSTRACTThe kinetics of alkali ion exchange of irradiated glasses were investigated using the structural energy barrier model for ion exchange of glasses. Derived rates of alkali ion exchange depend both on irradiation dose D(Gy) and dose rate q(Gy/s) illustrating that some effects cannot be simulated by external irradiation and require in-situ measurements. Higher D and q lead to increased ion exchange rates. Significant changes occur in the activation energies demonstrating a 4 – 6 times decrease depending on glass composition. Radiation-induced changes are higher at relatively low temperatures and are diminished by increased glass temperature. Numerical estimations show that changes in alkali ion exchange kinetics occur at D far below damaging doses.

scholarly journals Hydrogen Bond Studies. 126. A 2H NMR Study of LiClO4.3D2O at 25 and -71 degrees C.

1978 ◽  
Vol 32a ◽  
pp. 1-5 ◽  
Author(s):  
Bo Berglund ◽  
Jörgen Tegenfeldt ◽  
Hilda Kvila ◽  
Arne F. Andresen ◽  
Olav Smidsrød ◽  
...  
Keyword(s):  
Hydrogen Bond ◽  
2H Nmr ◽  
Nmr Study

In situ NMR study of hydrogenation/dehydrogenation of ZrCr2 and physisorbed hydrogen

2012 ◽  
Vol 540 ◽  
pp. 222-227 ◽  
Author(s):  
Jamil Ahmad ◽  
Hideki Maekawa ◽  
Hitoshi Takamura ◽  
Itaru Oikawa ◽  
Mariko Ando ◽  
...  
Keyword(s):  
Nmr Study ◽  
In Situ Nmr
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