scholarly journals Characterization of Intracellular Structure Changes of Microcystis under Sonication Treatment by Polarized Light Scattering

Biosensors ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 279
Author(s):  
Jiajin Li ◽  
Chujun Zou ◽  
Ran Liao ◽  
Liang Peng ◽  
Hongjian Wang ◽  
...  
Keyword(s):  
Light Scattering ◽  
Removal Efficiency ◽  
Structural Changes ◽  
Cyanobacterial Bloom ◽  
Health And Safety ◽  
Polarized Light ◽  
Cyanobacteria Blooms ◽  
Structure Changes ◽  
Sonication Treatment ◽  
Intracellular Structure

Cyanobacterial bloom is one of the most urgent global environmental issues, which eventually could threaten human health and safety. Sonication treatment (ST) is a potential effective method to control cyanobacteria blooms in the field. Currently, the bottleneck of extensive application of ST is the difficulty to estimate the ST effect on the cyanobacterial cells and then determine suitable ST times in the field. In this study, cyanobacterial Microcystis samples sonicated at different times were first measured by a spectrophotometer to calculate the removal efficiency of Microcystis cells. Additionally, they were observed by TEM to reveal the intracellular structure changes of the cells. Then the samples were measured by an experimental setup based on polarized light scattering to measure the polarization parameters. Experimental results indicated that the polarization parameters can effectively characterize the intracellular structural changes of Microcystis cells with different ST times, which is quite consistent with the results for removal efficiency and TEM images. Further, the optimal ST time can be inferred by the polarization parameters. These results demonstrate that polarized light scattering can be a potentially powerful tool to explore suitable times for sonication treatment of cyanobacteria blooms.

scholarly journals Anisotropic dielectric susceptibility matrix of anisotropic medium

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wanrong Gao
Keyword(s):  
Light Scattering ◽  
Anisotropic Medium ◽  
Polarized Light ◽  
Scattering Matrix ◽  
Dielectric Susceptibility ◽  
Anisotropic Dielectric ◽  
New Methods ◽  
Mueller Matrices ◽  
Anisotropic Structures ◽  
The Fourier Transform

AbstractIn this work, we introduce the concept of anisotropic dielectric susceptibility matrix of anisotropic medium for both nondepolarizing and depolarizing medium. The concept provides a new way of analyzing light scattering properties of anisotropic media illuminated by polarized light. The explicit expressions for the elements of the scattering matrix are given in terms of the elements of the Fourier transform of the anisotropic dielectric susceptibility matrix of the medium. Finally, expressions for the elements of the Jones matrix of a thin layer of a deterministic anisotropic medium and the elements of the Mueller matrix of a depolarizing medium are given. The results obtained in this work is helpful for deriving information about the correlated anisotropic structures in depolarizing media from measured Mueller matrices. The findings in this work may also well prove stimulating to researchers working on new methods for analyzing light scattering properties.

Structural and thermal properties of the amaranth starch granule obtained by high-impact wet milling

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Diego Fernando Roa Acosta ◽  
José Fernando Solanilla Duque ◽  
Lina Marcela Agudelo Laverde ◽  
Héctor Samuel Villada Castillo ◽  
Marcela Patricia Tolaba
Keyword(s):  
Thermal Properties ◽  
Structural Changes ◽  
Starch Granule ◽  
Amorphous Region ◽  
Extraction Yield ◽  
High Impact ◽  
Degree Of Crystallinity ◽  
Wet Milling ◽  
Starch Structure ◽  
Structure Changes

AbstractIn this study, amaranth starch was extracted by high-impact wet milling and its structural and thermal properties and the effect of NaOH and SDS concentrations on extraction yield were evaluated. The best condition was 55 g of starch/100 g of amaranth, with a decrease from 2.5 to 3.5 kJ/g using different milling energies. The decrease in the protein content of the starch granule is due to an effect of the interaction between surfactant and alkali, preventing the destruction of granules. All starches presented a degree of crystallinity between 21 and 28%. The internal structural changes of the starch granule were monitored by attenuated total reflectance - Fourier-transform infrared (ATR-FTIR) in the region of 990 to 1060 cm−1. Spectra showed significant differences between the peaks at 1032 and 1005 cm−1, corresponding to the crystalline/amorphous region of the starch structure. Changes in viscosity profiles were observed between 0.302 and 1.163 Pa s.

Polarized light-scattering profile-advanced characterization of nonspherical particles with scanning flow cytometry

2011 ◽  
Vol 79A (7) ◽  
pp. 570-579 ◽  
Author(s):  
Dmitry I. Strokotov ◽  
Alexander E. Moskalensky ◽  
Vyacheslav M. Nekrasov ◽  
Valeri P. Maltsev
Keyword(s):  
Flow Cytometry ◽  
Light Scattering ◽  
Polarized Light ◽  
Advanced Characterization ◽  
Nonspherical Particles

Early warning of cyanobacterial blooms based on polarized light scattering powered by machine learning

Measurement ◽  
2021 ◽  
pp. 109902
Author(s):  
Hongjian Wang ◽  
Jiajin Li ◽  
Ran Liao ◽  
Yi Tao ◽  
Liang Peng ◽  
...  
Keyword(s):  
Machine Learning ◽  
Light Scattering ◽  
Early Warning ◽  
Polarized Light ◽  
Cyanobacterial Blooms

Illustration of a bimodal system in Intralipid-20% by polarized light scattering: experiments and modeling

2008 ◽  
Vol 94 (2) ◽  
pp. 347-355 ◽  
Author(s):  
C. Bordier ◽  
C. Andraud ◽  
E. Charron ◽  
J. Lafait ◽  
M. Anastasiadou ◽  
...  
Keyword(s):  
Light Scattering ◽  
Polarized Light

scholarly journals Struktur Hasil Translokasi Bangunan Vernakular Jawa Timur di Kampoeng Djawi Wonosalam

2018 ◽  
Vol 16 (2) ◽  
pp. 49-60
Author(s):  
Yohanes Vincent Mahendar Bagaskara ◽  
◽  
Yusfan Adeputera Yusran ◽  
Keyword(s):  
Structural Changes ◽  
Ex Situ Conservation ◽  
Ex Situ ◽  
Tourist Destination ◽  
Structure Changes ◽  
New Locations ◽  
Vernacular Building ◽  
Qualitative Descriptive ◽  
Vernacular Buildings ◽  
Descriptive Method

Vernacular buildings in Indonesia, especially vernacular buildings of East Java, are increasingly diminishing. Many efforts have been made to maintain the existence of vernacular buildings, one of which is ex-situ conservation by re-using it adaptively as a tourist destination as found in Kampoeng Djawi Wonosalam. Translocation of vernacular buildings to new locations and new function causes changes in vernacular buildings, particularly in its structure. Changes occur as an adaption to new locations and new activities that will be accommodated. The objective of this paper is to describe the structural changes in vernacular buildings as the result of translocation. Qualitative descriptive method is used to find the structural changes, so the results obtained are actual facts. Changes that occur then analyzed with the concept of adaptive exoskeleton building. According to the results of observations and analysis, changes that occur in vernacular building translocation are caused by resilience, safety, and visual factors, as well as fulfillment of new activities.

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