Results 161 to 170 of about 51,192 (188)
Some of the next articles are maybe not open access.
Circular dichroism measurements. I. Calibration of a circular dichroism spectrometer
Review of Scientific Instruments, 1985The Mueller matrix approach is used to analyze the problems associated with the calibration of a modern CD spectropolarimeter constructed on the basis of a modulation technique in polarization spectroscopy. As a result, the performance of the CD spectropolarimeter is found to be determined by the characteristics of the photomultiplier as a partial ...
Masayuki Nakagawa, Yohji Shindo
openaire +2 more sources
A Near-Infrared Circular Dichroism and Magnetic Circular Dichroism Instrument
Review of Scientific Instruments, 1973We report a high sensitivity, near-infrared circular dichroism (CD) instrument. CD is measured by the standard modulation method; phase modulation is provided by an Infrasil quartz photoelastic modulator. The spectral range 0.8–3.0 μ is spanned. Incorporation of a superconducting magnet allows magnetic circular dichroism (MCD) measurements to be made ...
Philip J. Stephens +2 more
openaire +2 more sources
Infrared Circular Dichroism and Linear Dichroism Spectrophotometer
Applied Optics, 1975An instrument for the measurement of circular dichroism (CD) between 5000 cm(-1) and 750 cm(-1) is described. This instrument also can perform high precision linear dichroism measurements in the same wavelength range. A germanium photoelastic modulator having a large linear and angular aperture is used to vary the polarization of monochromatic ir light
G. Holzwarth, Ilan Chabay
openaire +3 more sources
Circular Dichroism of Quadruplex Structures
2012Circular dichroism (CD) is a widespread technique for studying the polymorphism of G-quadruplexes. In this chapter the CD spectral features characteristic of different folding topologies of G4-DNA are analyzed in terms of the sequence of the syn or anti glycosidic bond angle (GBA) within a quadruplex stem.
RANDAZZO, ANTONIO +2 more
openaire +4 more sources
Circular dichroism and magnetic circular dichroism of Azotobacter vinelandii ferredoxin I
Biochemistry, 1991Room temperature circular dichroism (CD) and low temperature magnetic circular dichroism (MCD) spectra of air-oxidized and dithionite-reduced Azotobacter vinelandii ferredoxin I (FdI), a [( 4Fe-4S]2+/1+, [3Fe-4S]1+/0) protein, are reported. Unlike the CD of oxidized FdI, the CD of dithionite-reduced FdI exhibits significant pH dependence, consistent ...
Barbara K. Burgess +6 more
openaire +3 more sources
Exciton Circular Dichroism in Channelrhodopsin
The Journal of Physical Chemistry B, 2014Channelrhodopsins (ChRs) are of great interest currently because of their important applications in optogenetics, the photostimulation of neurons. The absorption and circular dichroism (CD) spectra of C1C2, a chimera of ChR1 and ChR2 of Chlamydomonas reinhardtii, have been studied experimentally and theoretically.
PESCITELLI, GENNARO +6 more
openaire +3 more sources
Circular Dichroism and Synchrotron Radiation Circular Dichroism Applications to Biomaterials
2019Circular dichroism is the differential absorption of left and right circularly polarized light (CPL) of chiral molecules. Molecules that do not superimpose their mirror images are chiral like L and D amino acids, of which the L enantiomers are the building blocks of proteins and analogously D-deoxyribose for DNA.
Giuliano Siligardi +3 more
openaire +2 more sources
[6] Magnetic circular dichroism
1995Publisher Summary Magnetic circular dichroism (MCD) is the differential absorption of left and right circularly polarized light induced by an externally applied magnetic field. MCD is one of the several forms of “higher order” spectroscopy that can augment the information provided by the measurement of the absorption of a sample using unpolarized ...
openaire +3 more sources
[12] Magnetic circular dichroism
1986Publisher Summary This chapter discusses the instrumental and application developments of magnetic circular dichroism (MCD). MCD arises when an external applied magnetic field perturbs the ground or excited states of a molecule resulting in differential absorption of polarized light.
openaire +3 more sources
An Introduction to Circular Dichroism and Synchrotron Radiation Circular Dichroism Spectroscopy
2009The aim of this chapter is to introduce the techniques of circular dichroism (CD) and synchrotron radiation circular dichroism (SRCD) spectroscopies. A brief account is given of how the spectrum of a molecule is generated as a consequence of excitations resulting in electronic transitions, which for chiral molecules produce differential absorbances for
Bonnie A. Wallace, Robert W. Janes
openaire +2 more sources