Optical properties of InGaN-based LEDs investigated using high hydrostatic pressure dependent techniques

2013 ◽  
Vol 250 (4) ◽  
pp. 698-702 ◽  
Author(s):  
B. G. Crutchley ◽  
I. P. Marko ◽  
J. Pal ◽  
M. A. Migliorato ◽  
S. J. Sweeney
2020 ◽  
Vol 203 ◽  
pp. 04014
Author(s):  
Valeriy Drobotko ◽  
Gennadiy Bukin ◽  
Sergey Sokolov ◽  
Alexander Yashonkov ◽  
Alexander Falko

In the functioning of various biological systems, an extremely important role is played by the dynamic properties of optically anisotropic protein macromolecules, such as translational movements, temporal correlations, and transfer processes, which are determined by the surface charge, molecular weight, molecular shape, and the nature of intermolecular interactions. An experimental study of the influence of high hydrostatic pressure on the optical properties of pike perch minced fish proteins at room temperature was carried out in this work. The intensities of the radiation transmitted through a thin plane-parallel layer of minced fish were measured, which was subjected to hydrostatic compression at a rate of ≈3 MPa/s and ≈17 MPa/s. It was found that with increasing pressure, the intensity of the transmitted light decreases nonmonotonically; in this case, the experimental plots of the I(P) dependence show the presence of broad attenuation bands of the intensity of the radiation transmitted through the sample, located at pressures of about 150, 300, and 700 MPa. The observed attenuation bands are associated with the appearance of scattering centers formed as a result of denaturation of macromolecules of proteins of various types with different functional purposes contained in the muscle tissue of pike perch.


2020 ◽  
Vol 499 ◽  
pp. 119179
Author(s):  
Fabio Piccinelli ◽  
Chiara De Rosa ◽  
Agata Lazarowska ◽  
Sebastian Mahlik ◽  
Marek Grinberg ◽  
...  

Author(s):  
M. Kobayashi ◽  
R. Akimoto ◽  
S. Endo ◽  
M. Yamanaka ◽  
M. Shinohara ◽  
...  

2020 ◽  
Vol 215 ◽  
pp. 01009
Author(s):  
Valeriy Drobotko ◽  
Gennadiy Bukin ◽  
Sergey Sokolov ◽  
Alexander Yashonkov ◽  
Alexander Falko

In the functioning of various biological systems, an extremely important role is played by the dynamic properties of optically anisotropic protein macromolecules, such as translational movements, temporal correlations, and transfer processes, which are determined by the surface charge, molecular weight, molecular shape, and the nature of intermolecular interactions.


2016 ◽  
Vol 18 (9) ◽  
pp. 6683-6690 ◽  
Author(s):  
S. Mahlik ◽  
A. Lazarowska ◽  
J. Ueda ◽  
S. Tanabe ◽  
M. Grinberg

In this study, we present optical properties and location of the Ce3+ energy levels in Y3Al2Ga3O12 (YAGG) and Y3Ga5O12 (YGG) ceramics at ambient and high hydrostatic pressure.


2004 ◽  
Vol 52 (4) ◽  
pp. 479-487 ◽  
Author(s):  
Cs. Pribenszky ◽  
M. Molnár ◽  
S. Cseh ◽  
L. Solti

Cryoinjuries are almost inevitable during the freezing of embryos. The present study examines the possibility of using high hydrostatic pressure to reduce substantially the freezing point of the embryo-holding solution, in order to preserve embryos at subzero temperatures, thus avoiding all the disadvantages of freezing. The pressure of 210 MPa lowers the phase transition temperature of water to -21°C. According to the results of this study, embryos can survive in high hydrostatic pressure environment at room temperature; the time embryos spend under pressure without significant loss in their survival could be lengthened by gradual decompression. Pressurisation at 0°C significantly reduced the survival capacity of the embryos; gradual decompression had no beneficial effect on survival at that stage. Based on the findings, the use of the phenomena is not applicable in this form, since pressure and low temperature together proved to be lethal to the embryos in these experiments. The application of hydrostatic pressure in embryo cryopreservation requires more detailed research, although the experience gained in this study can be applied usefully in different circumstances.


2010 ◽  
Vol 37 (6) ◽  
pp. 641-645 ◽  
Author(s):  
Can-Xin XU ◽  
Chun WANG ◽  
Bing-Yang ZHU ◽  
Zhi-Ping GAO ◽  
Di-Xian LUO ◽  
...  

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