The Experts below are selected from a list of 69 Experts worldwide ranked by ideXlab platform
Larry Kevan - One of the best experts on this subject based on the ideXlab platform.
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study of copper ii location and adsorbate interaction in cuh sapo 34 molecular sieve by electron spin resonance and electron spin echo modulation spectroscopies
The Journal of Physical Chemistry, 1992Co-Authors: Maggie Zamadics, Xinhua Chen, Larry KevanAbstract:H-SAPO-34 doped with Cu(II) ions is studied by electron spin resonance (ESR) and electron spin echo modulation (ESEM) techniques. In the Hydrated Sample Cu(II) was determined to be octahedrally coordinated to three framework oxygens and three water molecules. The most likely location for this copper ion complex to reside is at a site displaced from the hexagonal window into the ellipsoidal cavity. Upon dehydration at 400 o C two distinct Cu(II) complexes are generated
Maggie Zamadics - One of the best experts on this subject based on the ideXlab platform.
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study of copper ii location and adsorbate interaction in cuh sapo 34 molecular sieve by electron spin resonance and electron spin echo modulation spectroscopies
The Journal of Physical Chemistry, 1992Co-Authors: Maggie Zamadics, Xinhua Chen, Larry KevanAbstract:H-SAPO-34 doped with Cu(II) ions is studied by electron spin resonance (ESR) and electron spin echo modulation (ESEM) techniques. In the Hydrated Sample Cu(II) was determined to be octahedrally coordinated to three framework oxygens and three water molecules. The most likely location for this copper ion complex to reside is at a site displaced from the hexagonal window into the ellipsoidal cavity. Upon dehydration at 400 o C two distinct Cu(II) complexes are generated
Xinhua Chen - One of the best experts on this subject based on the ideXlab platform.
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study of copper ii location and adsorbate interaction in cuh sapo 34 molecular sieve by electron spin resonance and electron spin echo modulation spectroscopies
The Journal of Physical Chemistry, 1992Co-Authors: Maggie Zamadics, Xinhua Chen, Larry KevanAbstract:H-SAPO-34 doped with Cu(II) ions is studied by electron spin resonance (ESR) and electron spin echo modulation (ESEM) techniques. In the Hydrated Sample Cu(II) was determined to be octahedrally coordinated to three framework oxygens and three water molecules. The most likely location for this copper ion complex to reside is at a site displaced from the hexagonal window into the ellipsoidal cavity. Upon dehydration at 400 o C two distinct Cu(II) complexes are generated
Jan Swenson - One of the best experts on this subject based on the ideXlab platform.
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dielectric and calorimetric studies of Hydrated purple membrane
Biophysical Journal, 2005Co-Authors: Peter Berntsen, Rikard Bergman, Helen Jansson, Martin Weik, Jan SwensonAbstract:Purple membranes (PM) from halobacteria were Hydrated to ∼0.4 and ∼0.2 g H2O/g of PM and studied by dielectric spectroscopy and differential scanning calorimetry between 120 and 300 K. The dielectric process, attributed to a local (β) relaxation of the confined supercooled water, shows an Arrhenius temperature behavior at low temperatures. In the case of the most Hydrated PM a small deviation from the Arrhenius behavior occurs at 190–200 K together with a pronounced endothermic process and an increased activation energy. The observed crossover is accompanied by a reduction of the interlayer spacing due to the partial loss of the intermembrane water. All these effects at ∼200 K are consistent with a scenario where the local relaxation process merges with a nonobservable α-relaxation of the interlayer water, giving rise to a more liquid-like behavior of the interfacial water. For the less Hydrated Sample the effects are less pronounced and shift to a slightly higher temperature.
J Kleinz - One of the best experts on this subject based on the ideXlab platform.
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image restoration for biological objects using external tem control and electronic image recording
Ultramicroscopy, 1992Co-Authors: Dieter Typke, Reiner Hegerl, J KleinzAbstract:Abstract Image restoration of low-contrast biological specimens resulting in an extended transfer range in the Fourier domain can be obtained from a small number of images of the same object area, recorded at defocus values ranging from small to rather strong underfocus (or under- and overfocus). External TEM control and electronic image recording greatly facilitate the application of this method. A carbon-film specimen, and proteasome particles embedded in vitreous ice, have been used as test objects. It was found that defocusing alters the magnification of the images. Correction for the magnification changes and for sign reversals of the phase contrast transfer function significantly improves the cross-correlation peak and thus the alignment of the images. After these corrections the correlation peak was recognizable even in cross-correlation functions between close-to-focus and stronger-defocused images of the ece-series. In the phase part of the restored image of the frozen-Hydrated Sample, details become visible which cannot be recognized in any of the original images. Some problems and further developments are discussed.
