Results 201 to 210 of about 900,455 (241)

CO2 Reduction on Copper‐Nitrogen‐Doped Carbon Catalysts Tuned by Pulsed Potential Electrolysis: Effect of Pulse Potential

open access: yesAdvanced Functional Materials, EarlyView.
This study demonstrates that pulsed potential electrolysis significantly improves CO2 reduction performance on copper‐nitrogen doped carbon electrodes. The formation of cationic copper sites and metallic clusters as a function of applied intermittent potential leads to notable selectivity changes compared to potentiostatic reduction.
Dorottya Hursán   +13 more
wiley   +1 more source

Carbon-13 magnetic resonance studies of carbon-13 enriched amino acids

Biochemical and Biophysical Research Communications, 1969
Abstract Carbon-13 magnetic resonance data is presented for carbon-13 enriched L-amino acids. The results are compared to the corresponding proton chemical shifts and discussed in terms of their potential applications to peptides and proteins.
W, Horsley, H, Sternlicht, J S, Cohen
openaire   +2 more sources

Nuclear Transmutations of Carbon-13

Nature, 1950
THIN (∼ 0.05 mgm./cm.2) deposits of carbon-13 prepared electromagnetically at the Atomic Energy Research Establishment, Harwell, have been bombarded by protons and deuterons of energy up to 1 MeV., and observations made on the (pγ)1,2, (dp)3,4, (dα)3 reactions.
C D, CURLING, J O, NEWTON
openaire   +2 more sources

Carbon-13 in natural cholesterol

Biological Mass Spectrometry, 1986
In order to assess the feasibility of using stable 13C as a tracer for studying cholesterol metabolism in vivo the 13C content of some commonly consumed foods and the stability of the 13C content of human serum cholesterol has been investigated. A procedure is described for the extraction and purification of cholesterol from food, tissues and serum ...
D, Mendelsohn   +3 more
openaire   +2 more sources

Carbon-13 NMR spectra of carbon-13 enriched chlorophylls a and b

Biochemical and Biophysical Research Communications, 1972
Abstract The proton decoupled 13C NMR (CMR) spectra of chlorophylls a and b enriched to 90% 13C have been obtained at 25.2 MHz and, despite the complexity of the spectra, many of the assignments of the 13C resonances have been made.
C E, Strouse   +2 more
openaire   +2 more sources

Carbon‐13 NMR of fluorocyclopropanes

Magnetic Resonance in Chemistry, 2008
AbstractCarbon‐13 and hydrogen NMR data are presented for several cyclopropanes with one to four fluorine atoms attached to the ring. Substituents directly attached to a ring carbon are found to unshield that carbon to an extent increasing with their electronegativity, but remote substituents may have an opposite effect.
openaire   +2 more sources

Carbon-13 NMR of Poly(Butadiene)

Rubber Chemistry and Technology, 1972
Abstract By using the carbon-13 NMR technique, it is shown that there are no cis-1,4-trans-1,4 linkages in an n-BuLi-catalyzed poly (butadiene). The polymer consists of “blocks” of cis-1,4 units and trans-1,4 units separated by isolated vinyl units.
openaire   +1 more source

Membranes: Carbon-13 NMR

2007
The sections in this article are 1 Introduction 2 Biomembrane and Model Membrane Studies 3 Membrane Protein Structure 4 Conclusions 5 Biographical Sketches Related ...
Frances Separovic, Bruce A. Cornell
openaire   +1 more source

Carbon-13 Spectral Simulation

2007
The sections in this article are 1 Introduction 2 Methodology for the Development of Individual Models 3 Regression Model Library 4 Model Selection 5 Neural Network Prediction of 13C NMR Spectra 6 13C NMR Simulation of Pyrans 7 Summary 8 Biographical Sketch Related ...
openaire   +1 more source

Carbon-13-carbon-13 coupling constants in a series of carbon-13-enriched amino acids

Journal of the American Chemical Society, 1974
John A. Sogn   +2 more
openaire   +1 more source

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