scholarly journals Chiroptical Measurement of Chiral Aggregates at Liquid-Liquid Interface in Centrifugal Liquid Membrane Cell by Mueller Matrix and Conventional Circular Dichroism Methods

Molecules ◽  
2011 ◽  
Vol 16 (5) ◽  
pp. 3636-3647 ◽  
Author(s):  
Hideaki Takechi ◽  
Oriol Arteaga ◽  
Josep M. Ribo ◽  
Hitoshi Watarai
Keyword(s):  
Circular Dichroism ◽  
Liquid Membrane ◽  
Mueller Matrix ◽  
Liquid Interface ◽  
Membrane Cell ◽  
Circular Dichroïsm

scholarly journals Measurement of Circular Dichroism Spectra of Liquid/Liquid Interface by Centrifugal Liquid Membrane Method

2004 ◽  
Vol 20 (11) ◽  
pp. 1489-1491 ◽  
Author(s):  
Sayaka WADA ◽  
Kazuhiko FUJIWARA ◽  
Hideaki MONJUSHIRO ◽  
Hitoshi WATARAI
Keyword(s):  
Circular Dichroism ◽  
Liquid Membrane ◽  
Liquid Interface ◽  
Circular Dichroism Spectra ◽  
Membrane Method ◽  
Circular Dichroïsm

scholarly journals Optical Chirality Determined from Mueller Matrices

2021 ◽  
Vol 11 (15) ◽  
pp. 6742
Author(s):  
Hans Arwin ◽  
Stefan Schoeche ◽  
James Hilfiker ◽  
Mattias Hartveit ◽  
Kenneth Järrendahl ◽  
...  
Keyword(s):  
Circular Dichroism ◽  
Constitutive Relations ◽  
Mueller Matrix ◽  
Optical Path ◽  
Electromagnetic Modeling ◽  
Structural Effects ◽  
Polarization Effects ◽  
Optical Chirality ◽  
Mueller Matrices ◽  
Circular Dichroïsm

Optical chirality, in terms of circular birefringence and circular dichroism, is described by its electromagnetic and magnetoelectric material tensors, and the corresponding optical activity contributes to the Mueller matrix. Here, spectroscopic ellipsometry in the spectral range 210–1690 nm is used to address chiral phenomena by measuring Mueller matrices in transmission. Three approaches to determine chirality parameters are discussed. In the first approach, applicable in the absence of linear polarization effects, circular birefringence and circular dichroism are evaluated directly from elements of a Mueller matrix. In the second method, differential decomposition is employed, which allows for the unique separation of chirality parameters from linear anisotropic parameters as well as from depolarization provided that the sample is homogeneous along the optical path. Finally, electromagnetic modeling using the Tellegen constitutive relations is presented. The last method also allows structural effects to be included. The three methods to quantify optical chirality are demonstrated for selected materials, including sugar solutions, α-quartz, liquid crystals, beetle cuticle, and films of cellulose nanocrystals.

Alignment and Chirality of Porphyrin J Aggregates Formed at the Liquid–Liquid Interface of a Centrifugal Liquid Membrane Cell

Langmuir ◽  
2013 ◽  
Vol 29 (24) ◽  
pp. 7249-7256 ◽  
Author(s):  
Hideaki Takechi ◽  
Adolf Canillas ◽  
Josep M. Ribó ◽  
Hitoshi Watarai
Keyword(s):  
Liquid Membrane ◽  
Liquid Interface ◽  
J Aggregates ◽  
Membrane Cell

scholarly journals Forensic medical differential diagnosis of brain infarctions and hemorrhasis of traumatic genesis by mueller-matrix microscopy

2021 ◽  
Vol 25 (1(97)) ◽  
pp. 24-30
Author(s):  
M. Garazdiuk ◽  
O. Dubolazov ◽  
V. Tiulienieva
Keyword(s):  
Differential Diagnosis ◽  
Ischemic Stroke ◽  
Circular Dichroism ◽  
Maximum Level ◽  
Study Groups ◽  
Mueller Matrix ◽  
Control Group ◽  
Histological Sections ◽  
Matrix Invariants ◽  
Circular Dichroïsm

Abstract. The aim of the work is to develop forensic criteria for differential diagnosis of traumatic hemorrhages (HTG), ischemic stroke (IS), and hemorrhages of nontraumatic genesis (HNG) formation by 3D Mueller-matrix microscopy of layers of azimuthal-invariant Mueller-matrix images of circular birefringence of histological sections of the brain. Material and methods. Native sections of brain taken from 110 corpses were used for the study in the case of: death from coronary heart disease - 20 (18.1%) native sections (group 1 - control); HTG - 30 (27.3%) sections (group 2), IIB - 30 (27.3%) sections (group 3), HNG - 30 (27.3%) sections (group 4). Measurement of the values of the distribution of coordinate parameters of polarization at the points of microscopic images was performed at the location of the standard Stokes polarimeter. Results. It is found that for each of the phase cross-sections of the field, the volume of distributions of complex amplitudes of sensitivity, specificity and balanced accuracy of statistical analysis of coordinate distributions of Mueller-matrix invariants of circular dichroism have maximum values for small phase shifts corresponding to their level. The maximum level of balanced accuracy of intergroup differentiation was revealed by calculating statistical moments of the 3rd and 4th order, which characterize the asymmetry and excess distributions of the Mueller-matrix invariants values of circular dichroism of histological sections of brain substance. Conclusions. Excellent balanced accuracy (95% - 96%) of differential diagnosis was achieved between the control group and all study groups, good accuracy (92% - 93%) between ischemic stroke and traumatic hemorrhage and satisfactory accuracy (85% - 86%) between traumatic and hemorrhagic strokes genesis.

scholarly journals Forensic medical evaluation of hemorrhages into the brain of traumatic and non-traumatic genesis by the Mueller matrix microscopy of circular dichroism

2021 ◽  
Vol 25 (2(98)) ◽  
pp. 29-34
Author(s):  
M. Garazdiuk ◽  
O. Dubolazov
Keyword(s):  
Circular Dichroism ◽  
Mueller Matrix ◽  
Control Group ◽  
Coronary Insufficiency ◽  
Microscopic Images ◽  
Histological Sections ◽  
Brain Substance ◽  
The Dead ◽  
Circular Dichroïsm ◽  
The Brain

The aim of the work is to develop forensic criteria for differentiation of hemorrhages of traumatic and non-traumatic genesis by digital Mueller matrix (MM) polarization microscopy of histological sections of human brain substance (HBS).Material and methods. Native histological preparations of HBS from 32 corpses with ischemic stroke (1 group), 35 corpses with hemorrhages of traumatic origin (2 groups), 33 corpses with hemorrhages in HBS of non-traumatic genesis (3 group) and 30 corpses caused by acute coronary insufficiency (4 control group). The method of research is azimuthal-invariant MM microscopy of circular dichroism (CD) of histological sections of the brain.Results. The results of studies of the coordinate and statistical structure of maps of the size of values at the points of digital microscopic images of histological sections of HBS of the dead of all groups revealed a coordinate-inhomogeneous structure of all distributions of the size of the CD of microscopic images of histological sections of the dead of all groups. Probable distributions that characterize MM invariants CD maps of histological sections of brain samples from all groups have a small scatter of values of the statistical moment of the 2nd order, as well as significant values of statistical moments of the 3rd and 4th orders.Conclusion. The efficiency of using the Mueller-matrix mapping method in diagnosing of hemorrhage genesis in the brain substance in the differentiation of the set of samples of control and experimental groups reaches a satisfactory level - 77% - 78%.

Characterization of Tamm-Horsfall Urinary Glycoprotein

1973 ◽  
Vol 31 ◽  
pp. 420-421
Author(s):  
John P. Robinson ◽  
J. David Puett
Keyword(s):  
Electron Microscopy ◽  
Circular Dichroism ◽  
Secondary Structure ◽  
Quaternary Structure ◽  
Normal Adult ◽  
Morphological Properties ◽  
Adult Males ◽  
Circular Dichroïsm ◽  
Urinary Glycoprotein

Much work has been reported on the chemical, physical and morphological properties of urinary Tamm-Horsfall glycoprotein (THG). Although it was once reported that cystic fibrotic (CF) individuals had a defective THG, more recent data indicate that THG and CF-THG are similar if not identical.No studies on the conformational aspects have been reported on this glycoprotein using circular dichroism (CD). We examined the secondary structure of THG and derivatives under various conditions and have correlated these results with quaternary structure using electron microscopy.THG was prepared from normal adult males and CF-THG from a 16-year old CF female by the method of Tamm and Horsfall. CF female by the method of Tamm and Horsfall.

Circular dichroism spectra of adsorbed dye-aggregates

1968 ◽  
Vol 65 ◽  
pp. 146-151 ◽  
Author(s):  
G. Scheibe ◽  
O. Wörz ◽  
F. Haimerl ◽  
W. Seiffert ◽  
J. Winkler
Keyword(s):  
Circular Dichroism ◽  
Circular Dichroism Spectra ◽  
Circular Dichroïsm
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