Results 211 to 220 of about 110,822 (263)
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Journal of Microscopy, 1997
The optical rotator is an unbiased, local stereological principle for estimation of cell volume and cell surface area in thick, transparent slabs. The underlying principle was first described in 1993 by Kiêu &38; Jensen ( J. Microsc170, 45–51) who also derived an estimator of length.
Tandrup, T +2 more
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The optical rotator is an unbiased, local stereological principle for estimation of cell volume and cell surface area in thick, transparent slabs. The underlying principle was first described in 1993 by Kiêu &38; Jensen ( J. Microsc170, 45–51) who also derived an estimator of length.
Tandrup, T +2 more
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Medical Hypotheses, 1990
It is suggested that viral nucleic acid inserts in vulnerable regions of host cell DNA contribute to cell transformation by introducing 43 degrees of optical rotation at 425 nm, and that a carcinogenic event caused by DNA inserts and adducts is spurious electron ejection from important adenine molecules that may be far from insert/adduct sites.
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It is suggested that viral nucleic acid inserts in vulnerable regions of host cell DNA contribute to cell transformation by introducing 43 degrees of optical rotation at 425 nm, and that a carcinogenic event caused by DNA inserts and adducts is spurious electron ejection from important adenine molecules that may be far from insert/adduct sites.
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Journal of Modern Optics, 1998
Transversally sharply structured optical fields are discussed, which rotate upon propagation without any lateral expansion of the intensity profile. Finite-aperture approximations of such fields, realizable with phase-only and complex-amplitude recording, are demonstrated.
P. Pääkkönen +8 more
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Transversally sharply structured optical fields are discussed, which rotate upon propagation without any lateral expansion of the intensity profile. Finite-aperture approximations of such fields, realizable with phase-only and complex-amplitude recording, are demonstrated.
P. Pääkkönen +8 more
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Optical Rotation of Achiral Compounds
Angewandte Chemie International Edition, 2008AbstractOriented achiral molecules and crystals with D2d symmetry or one of its non‐enantiomorphous subgroups, S4, C2v, or Cs, can rotate the plane of transmitted polarized light incident in a general direction. This well‐established fact of crystal optics is contrary to the teaching of optical activity to students of organic chemistry. This Minireview
Kacey, Claborn +3 more
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Nonreciprocal Optical Rotation in Antiferromagnets
Physical Review Letters, 1995We consider nonreciprocal optical effects in classical N\'eel antiferromagnets, where the purely macroscopic electrodynamics does not provide any rotation. The nonzero result appears as a correction linear in the scattering theory parameter $a/\ensuremath{\lambda}$, atomic distance over wavelength.
, Dzyaloshinskii, , Papamichail
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OPTICAL ROTATION AND ATOMIC DIMENSION
Journal of the American Chemical Society, 1934AbstractFrom measurements of the optical rotations of F, Cl, Br, I substitutes of acetyl sugars and of optically active alcohols two rules are derived connecting the differences in optical rotation with the differences of atomic diameter.
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Optical Rotation of Achiral Pentaerythritol
Journal of the American Chemical Society, 2006The optical rotatory power of achiral crystals of achiral pentaerythritol molecules was measured. The maximum rotations were found to be +/-6 degrees /mm. The quantum mechanically computed rotation of pentaerythritol molecules using linear response theory was 6 times larger although the experimental and theoretical tensors were similarly oriented to ...
Claborn, K. +6 more
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Optical Rotation of Noncovalent Aggregates
Journal of the American Chemical Society, 2003Dilute solutions of (R)-(-)-pantolactone in CCl4 were studied by polarimetry in conjunction with theoretical calculations of [alpha]D. Our data demonstrate that the self-association of a chiral solute results in a change in [alpha]D that can be accounted for by the presence of hydrogen-bonded dimeric species.
Michael-Rock, Goldsmith +3 more
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The optical rotation of gelatin films
Journal of Polymer Science Part A-1: Polymer Chemistry, 1968AbstractOptical rotation measurements of a series of relatively thick gelatin films prepared under a variety of drying conditions were made. The technique permits rotation measurements to be made during the drying process. It is found that the temperature and humidity of the drying air do not significantly affect the rotation of the films at ...
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Observation of an amplified optical rotation
Applied Optics, 1987Il est possible d'obtenir des signaux de rotation optique intenses sans exposer l'echantillon a un flux de lumiere ...
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