Influence of Thioridazine Hydrochloride on the Phase Profile of Phosphatidylcholine Liposome

In order to demonstrate whether the known biological effects ofAloe vera(L.) Burm. fil. could correlate with the antioxidant activity of the plant, the antioxidant activity of the aqueous leaf extract was investigated. The present study demonstrated that the aqueous extract fromA. veraleaves contained naturally occuring antioxidant components, including total phenols, flavonoids, ascorbic acid, β-carotene and α-tocopherol. The extract exhibited inhibitory capacity against Fe3+/ascorbic acid induced phosphatidylcholine liposome oxidation, scavenged stable DPPH•, ABTS•+and superoxide anion radicals, and acted as reductant. In contrast, the leaf inner gel did not show any antioxidant activity. It was concluded that the known beneficial effects ofAloe veracould be attributed to its antioxidant activity and could be related to the presence of phenolic compounds and antioxidant vitamins.

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Zeroth- and first-order long range non-diffracting Gauss–Bessel beams generated by annihilating multiple-charged optical vortices

Scientific Reports ◽

10.1038/s41598-020-78613-7 ◽

2020 ◽

Vol 10 (1) ◽

Author(s):

Lyubomir Stoyanov ◽

Maya Zhekova ◽

Aleksander Stefanov ◽

Ivan Stefanov ◽

Gerhard G. Paulus ◽

...

Keyword(s):

Long Range ◽

Spatial Light Modulator ◽

Width Ratio ◽

Optical Vortices ◽

Large Radius ◽

Light Modulator ◽

Bessel Beams ◽

First Order ◽

Shaped Beam ◽

Phase Profile

AbstractWe demonstrate an alternative approach for generating zeroth- and first-order long range non-diffracting Gauss–Bessel beams (GBBs). Starting from a Gaussian beam, the key point is the creation of a bright ring-shaped beam with a large radius-to-width ratio, which is subsequently Fourier-transformed by a thin lens. The phase profile required for creating zeroth-order GBBs is flat and helical for first-order GBBs with unit topological charge (TC). Both the ring-shaped beam and the required phase profile can be realized by creating highly charged optical vortices by a spatial light modulator and annihilating them by using a second modulator of the same type. The generated long-range GBBs are proven to have negligible transverse evolution up to 2 m and can be regarded as non-diffracting. The influences of the charge state of the TCs, the propagation distance behind the focusing lens, and the GBB profiles on the relative intensities of the peak/rings are discussed. The method is much more efficient as compared to this using annular slits in the back focal plane of lenses. Moreover, at large propagation distances the quality of the generated GBBs significantly surpasses this of GBBs created by low angle axicons. The developed analytical model reproduces the experimental data. The presented method is flexible, easily realizable by using a spatial light modulator, does not require any special optical elements and, thus, is accessible in many laboratories.

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Transmissive 2-bit anisotropic coding metasurface

Chinese Physics B ◽

10.1088/1674-1056/ac4a6b ◽

2022 ◽

Author(s):

Pengtao Lai ◽

Zenglin Li ◽

Wei Wang ◽

Jia Qu ◽

Liang Wei Wu ◽

...

Keyword(s):

Angular Momentum ◽

Electromagnetic Wave ◽

Circular Polarization ◽

Orbital Angular Momentum ◽

Electromagnetic Waves ◽

Beam Splitter ◽

Far Field ◽

Polarization Conversion ◽

Field Patterns ◽

Phase Profile

Abstract Coding metasurfaces have attracted tremendous interests due to unique capabilities of manipulating electromagnetic wave. However, archiving transmissive coding metasurface is still challenging. Here we propose a transmissive anisotropic coding metasurface that enables the independent control of two orthogonal polarizations. The polarization beam splitter and the OAM generator have been studied as typical applications of anisotropic 2-bit coding metasurface. The simulated far field patterns illustrate that the x and y polarized electromagnetic waves are deflected into two different directions, respectively. The anisotropic coding metasurface has been experimentally verified to realize an orbital angular momentum (OAM) beam with l = 2 of right-handed polarized wave, resulting from both contributions from linear-to-circular polarization conversion and the phase profile modulation. This work is beneficial to enrich the polarization manipulation field and develop transmissive coding metasurfaces.

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Spectroscopic and calorimetric studies on trazodone hydrochloride–phosphatidylcholine liposome interactions in the presence and absence of cholesterol

Biochimica et Biophysica Acta (BBA) - Biomembranes ◽

10.1016/j.bbamem.2014.06.009 ◽

2014 ◽

Vol 1838 (10) ◽

pp. 2369-2379 ◽

Cited By ~ 9

Author(s):

Dilek Yonar ◽

M. Maral Sünnetçioğlu

Keyword(s):

Phosphatidylcholine Liposome ◽

Presence And Absence ◽

Calorimetric Studies ◽

Trazodone Hydrochloride

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Adaptive modulation system for optical phase profile

Chinese Journal of Liquid Crystals and Displays ◽

10.37188/cjlcd.2020-0327 ◽

2021 ◽

Vol 36 (4) ◽

pp. 522-528

Author(s):

Hong-zhou ZHANG ◽

◽

Zhi-kang ZHU ◽

Kai HUANG ◽

Jian-gang LU

Keyword(s):

Adaptive Modulation ◽

Optical Phase ◽

Phase Profile

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Metrology of a Focusing Capillary Using Optical Ptychography

Sensors ◽

10.3390/s20226462 ◽

2020 ◽

Vol 20 (22) ◽

pp. 6462

Author(s):

Xiaojing Huang ◽

Evgeny Nazaretski ◽

Weihe Xu ◽

Dean Hidas ◽

Mark Cordier ◽

...

Keyword(s):

Standard Deviation ◽

Laser Beam ◽

Gaussian Distribution ◽

Capillary Surface ◽

Functional Surfaces ◽

Phase Profile ◽

Reflective Optics ◽

Focusing Property ◽

Focused Beam ◽

Quantitative Tool

The focusing property of an ellipsoidal monocapillary has been characterized using the ptychography method with a 405 nm laser beam. The recovered wavefront gives a 12.5×10.4μm2 focus. The reconstructed phase profile of the focused beam can be used to estimate the height error of the capillary surface. The obtained height error shows a Gaussian distribution with a standard deviation of 1.3 μm. This approach can be used as a quantitative tool for evaluating the inner functional surfaces of reflective optics, complementary to conventional metrology methods.

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