Results 251 to 260 of about 261,173 (297)

Paramagnetic probe technique for studying molecular motions in polymers

European Polymer Journal, 1969
Abstract In the paramagnetic probe technique, information about molecular motion in polymers is obtained using stable organic nitroxide radicals incorporated in polymer matrices. Temperature dependence of radical rotation in polymers is well described by Arrhenius equation.
A.M. Wasserman, A.L. Buchachenko, A.L. Kovarskii, M.B. Neiman   +3 more
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Investigation of molecular motion in collagen using the spin‐probe technique

Biopolymers, 1977
AbstractThe spin‐probe technique was employed to study molecular motion in collagen and modified collagen samples in the −160° to +200°C region. The effect of water content in the 0–30‐wt. % range, relative to vacuum dried samples, on the electron spin resonance spectrum of the probe was also investigated.
T, Nagamura, A E, Woodward
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Probing the molecular mechanism of interaction between polystyrene nanoplastics and catalase by multispectroscopic techniques

Chemico-Biological Interactions, 2023
Nanoplastics are emerging pollutants that pose a potential threat to the environment and organisms and are widely distributed in environmental samples and food chains. The accumulation of polystyrene nanoplastics (PS-NPs) in an organism can cause oxidative stress. Currently, toxicity studies of PS-NPs mainly focus on the individual and cellular levels,
Shuncheng, Hu, Mengchen, Xu, Zhaohao, Cui, Yihua, Xiao, Changqing, Liu, Rutao, Liu, Guomin, Zhang   +6 more
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Emulsion Reactors: A New Technique for the Preparation of Molecular Imaging Probes

Chemistry – A European Journal, 2012
There is an ongoing global effort to prepare targeted molecular imaging (MI) agents for positron emission tomography (PET) and single photon emission computed tomography (SPECT) by labeling small molecules, peptides, and antibodies with radionuclides.
Ryan W, Simms, Dong Hyun, Kim, Darren M, Weaver, Chitra, Sundararajan, Megan, Blacker, Karin A, Stephenson, John F, Valliant   +6 more
openaire   +2 more sources

Short Wavelength Inner Filter Technique (SWIFT) in Designing Reactive Fluorescent Molecular Probes

Journal of the American Chemical Society, 2019
Here, we present a conceptually novel and experimentally straightforward technique for selective analyte detection that uses a combination of commercial fluorophores and simple chemicals. The technique utilizes the well-known inner filter effect (IFE); however, the fluorophore's excitation is performed at wavelengths significantly shorter than its ...
Abhishek Baheti, Arkadi Vigalok
openaire   +2 more sources

Characterization of Nonlinear Molecular Dynamics Using The Double Pump Probe Technique

Frontiers in Optics 2008/Laser Science XXIV/Plasmonics and Metamaterials/Optical Fabrication and Testing, 2008
We performed double pump-probe experiments to study the intra-molecular dynamics of several nonlinear organic dye molecules. The method allows for characterization of triplet states yield and cross-section. Several special cases of molecular dynamics are presented.
Davorin Peceli, Claudiu Cirloganu, Scott Webster, Lazaro A. Padilha, David J. Hagan, Eric W. Van Stryland, Susan Odom, Jon Matichak, Stephen Barlow, Raghunath R Dasari, Seth R. Marder   +10 more
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NMR Probes of Molecular Dynamics: Overview and Comparison with Other Techniques

Annual Review of Biophysics and Biomolecular Structure, 2001
▪ Abstract  NMR spin relaxation spectroscopy is a powerful approach for characterizing intramolecular and overall rotational motions in proteins. This review describes experimental methods for measuring laboratory frame spin relaxation rate constants by high-resolution solution-state NMR spectroscopy, together with theoretical approaches for ...
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Molecular aggregation of rhodamine 6G probed by optical and electrochemical techniques

Chemical Physics Letters, 1992
Abstract Emission spectra of rhodamine 6G (R6G) aggregates were observed at 77 K both in water and in alcohols. The temperature behavior of emission and excitation spectra, and their excited state lifetimes illustrated that the transition moment of the lower exciton component, μ, for rhodamine 6G aggregates in alcohols is greater than that in water ...
C.T. Lin, A.M. Mahloudji, Li Li, M.W. Hsiao   +3 more
openaire   +1 more source

Detection of methylotrophic bacteria in natural samples by molecular probing techniques

Chemosphere, 1993
Abstract To allow a full understanding of the global methane cycle, the contribution made by microbes as a sink for methane must be investigated. Many methane-oxidizing bacteria present in environmental samples are not easily cultured by using normal microbiological techniques, leading to an underestimate of the numbers of such bacteria in the marine
J.C. Murrell, V. McGowan, D.L.N. Cardy
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Molecular contrast in optical coherence tomography using a pump-probe technique

SPIE Proceedings, 2003
Optical coherence tomography (OCT) is an emerging tool for real time in-situ tissue imaging with micrometer-scale resolution. Real-time OCT systems have been integrated into clinical medical diagnostics, and functional extensions such as polarization-sensitive, Doppler, and spectroscopic OCT have recently been introduced.
K. D. Rao, Michael A. Choma, Siavash Yazdanfar, Andrew M. Rollins, Joseph A. Izatt   +4 more
openaire   +1 more source