Specific contributions of tyrosyl and of tryptophanyl residues can be distinguished in the near-ultraviolet circular dichroic spectrum of staphylococcal nuclease. Upon binding of the inhibitor deoxythymidine 3',5'-diphosphate in the presence of Ca(++), a significant change in the circular dichroic spectrum results which has been used to characterize the interaction of ligand and enzyme. The dat...

To support the case for a biological applicability of previous experiments performed on chemically prepared apoferritin, its hydrodynamic and circular dichroic properties were compared to those of tissue-endogenous apoferritin. The molecular weights and sedimentation coefficients of the two differently prepared apoferritins were identical. Similarly, their circular dichroic spectra between 310 ...

Abstract The Polar beamline will make use of the small emittance new APS-U storage ring and offer extremely brilliant coherent beam variable polarization in hard x-ray range. Tailored optics experimental equipment enable high spatial resolution dichroic spectroscopy, reflectivity diffraction combination with extreme pressures, low temperatures magnetic fields. Dichroic direct ptychographic imag...

Using the enantiomeric bis-bidentate bridging ligands (+)/(-)-2,5-bis(4,5-pinene-2-pyridyl)pyrazine (L(S)/L(R)) and depending on the ratio control of reactants, two mono- and dinuclear Eu(III)-based enantiomeric pairs with the formulae Eu(dbm)(3)L(R/S)·2H(2)O (L(R) in R-1, L(S) in S-1 and dbm = dibenzoylmethanato) and Eu(2)(dbm)(6)L(R/S)·H(2)O (L(R) in R-2 and L(S) in S-2) have been stereoselec...

The reversible binding of the haptens 2,4-dinitrophenyllysine (DNP-lysine) and 2,4,6-trinitrophenyllysine (TNP-lysine) to either the nitrophenyl-binding myeloma protein MOPC-315 or to pooled mouse anti-DNP or anti-TNP antibodies produces large and characteristic extrinsic Cotton effects (in the circular dichroic spectra). Despite the similarities in binding characteristics of the three proteins...

The hexagermane Pr(i)3Ge(GePh2)4GePr(i)3 has been synthesized and is not only the first such linear oligogermane to be structurally characterized but also is the first such compound to exhibit fluorescence and dichroic properties when observed under different orientations of plane polarized visible light.

Biominerals such as seashells, corals skeletons, bone, and enamel are optically anisotropic crystalline materials with unique nano- micro-scale organization that translates into exceptional macroscopic mechanical properties, providing inspiration for engineering new superior biomimetic structures. Here we use particles of Seriatopora aculeata coral skeleton a model demonstrate, the first time, ...

Expressions for dichroic signals in terms of electron multipoles have been used to analyse optical data gathered on a crystal of copper metaborate in the presence of a magnetic field. Calculated signals comply with the established crystal and magnetic structures of CuB(2)O(4), and respect the global symmetries of parity-even and parity-odd dichroic signals in full. We have success in describing...