Optical Behaviour

1996 ◽  
pp. 208-216
Author(s):  
Donald R. Askeland
Keyword(s):  
Optical Behaviour

Nanoemulsions- A better Approach for Anti Diabeticdrugs Delivering

2020 ◽  
Vol 17 ◽  
Author(s):  
V. Manimaran ◽  
Ponnurengam Malliappan Sivakumar ◽  
J. Narayanan ◽  
Shanmugam Parthasarathi ◽  
Pranav Kumar Prabhakar
Keyword(s):  
Aqueous Phase ◽  
Therapeutic Agent ◽  
Antidiabetic Drugs ◽  
Optical Behaviour ◽  
Antimicrobial Drugs ◽  
Drug Degradation ◽  
Oil In Water ◽  
Drug Technology ◽  
Human Use ◽  
Poor Absorption

: Conventional delivery of antidiabetic drugs faces many problems like poor absorption, low bioavailability, and drug degradation. Nanoemulsion is a unique drug technology which is very suitable for the delivery of antidiabetic drugs. In recent years the flaws of delivering anti-hypoglycaemic drugs have been overcome by choosing nanoemulsion drug technology. They are thermodynamically stable and also deliver the therapeutic agent for a longer duration. Generally, Nanoemulsions are made up of either oil-in-water or water-in-oil and size of the droplets is from fifty to thousand nanometer. Surfactants are critical substances which are added in the manufacturing of nanoemulsions. Only the surfactants which are approved for human use can be utilized in the manufacturing of nanoemulsions. Generally, the preparation of emulsions includes mixing of the aqueous phase and organic phase and using surfactant with proper agitation. Nanoemulsions are used for antimicrobial drugs, and they are also used in the prophylaxis of cancer, diabetics. Reduction in the droplet size may cause variation in the elastic and optical behaviour of nanoemulsions.

scholarly journals Polarimetric Properties of Blazars Caught by the WEBT

Galaxies ◽  
2021 ◽  
Vol 9 (2) ◽  
pp. 42
Author(s):  
Claudia M. Raiteri ◽  
Massimo Villata
Keyword(s):  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Plasma Jets ◽  
Line Of Sight ◽  
Optical Behaviour ◽  
Relativistic Jets ◽  
Comprehensive Picture ◽  
Multi Wavelength ◽  
Extreme Variability ◽  
Continuous Range

Active galactic nuclei come in many varieties. A minority of them are radio-loud, and exhibit two opposite prominent plasma jets extending from the proximity of the supermassive black hole up to megaparsec distances. When one of the relativistic jets is oriented closely to the line of sight, its emission is Doppler beamed and these objects show extreme variability properties at all wavelengths. These are called “blazars”. The unpredictable blazar variability, occurring on a continuous range of time-scales, from minutes to years, is most effectively investigated in a multi-wavelength context. Ground-based and space observations together contribute to give us a comprehensive picture of the blazar emission properties from the radio to the γ-ray band. Moreover, in recent years, a lot of effort has been devoted to the observation and analysis of the blazar polarimetric radio and optical behaviour, showing strong variability of both the polarisation degree and angle. The Whole Earth Blazar Telescope (WEBT) Collaboration, involving many tens of astronomers all around the globe, has been monitoring several blazars since 1997. The results of the corresponding data analysis have contributed to the understanding of the blazar phenomenon, particularly stressing the viability of a geometrical interpretation of the blazar variability. We review here the most significant polarimetric results achieved in the WEBT studies.

Thermal, structural and optical behaviour of Eu3+ ions in Zinc Alumino Boro-Silicate glasses for bright red emissions

2021 ◽  
pp. 124787
Author(s):  
M. Monisha ◽  
M.S. Murari ◽  
M.I. Sayyed ◽  
Hanan Al-Ghamdi ◽  
Aljawhara H. Almuqrin ◽  
...  
Keyword(s):  
Silicate Glasses ◽  
Optical Behaviour

Dielectric dynamics and optical behaviour of surfactant free LC/silicone oil based non-aqueous emulsions

2021 ◽  
pp. 1-10
Author(s):  
Ravi K. Shukla ◽  
Ashok Chaudhary ◽  
K. K. Raina
Keyword(s):  
Silicone Oil ◽  
Optical Behaviour

Stress optical behaviour of ammonium pentaborate under linear and hydrostatic stresses

1984 ◽  
Vol 19 (6) ◽  
pp. 1787-1790 ◽  
Author(s):  
Md. Shahabuddin Khan ◽  
T. S. Narasimhamurty
Keyword(s):  
Optical Behaviour ◽  
Hydrostatic Stresses

Optical behaviour of VTE treated near stoichiometric LiNbO3 crystals

2006 ◽  
Vol 137 (6) ◽  
pp. 283-287 ◽  
Author(s):  
S. Kar ◽  
R. Bhatt ◽  
V. Shukla ◽  
R.K. Choubey ◽  
P. Sen ◽  
...  
Keyword(s):  
Optical Behaviour

The optical behaviour of snow during a melting season at Ny Ålesund (Svalbard, Norway)

2021 ◽  
Author(s):  
Roberto Salzano ◽  
Christian Lanconelli ◽  
Giulio Esposito ◽  
Marco Giusto ◽  
Mauro Montagnoli ◽  
...  
Keyword(s):  
Climate Change ◽  
Snow Cover ◽  
Full Range ◽  
Time Lapse ◽  
Test Site ◽  
Remotely Sensed ◽  
Optical Behaviour ◽  
Remotely Sensed Data ◽  
Snow Cover Area ◽  
Significant Information

<p><span>Polar areas are the most sensitive targets of </span><span>the </span><span>climate change and the continuous monitoring of the cryosphere represents a critical issue. The satellite remote sensing can fill this gap but further integration between remotely-sensed multi-spectral images and field data is crucial to validate retrieval algorithms and climatological models. The optical behaviour of snow, at different wavelengths, provides significant information about the micro-physical characteristics of the surface and this allow to discriminate different snow/ice covers. The aim of this work is to present an approach based on combining unmanned observations on spectral albedo and on the analysis of time-lapse images of sky and ground conditions in a</span><span>n </span><span>Ar</span><span>c</span><span>tic </span><span>test-site </span><span>(Svalbard, Norway). Terrestrial photography can provide, in fact, important information about the cloud cover and support the discrimination between white-sky or clear-sky illuminating conditions. Similarly, time-lapse cameras can provide a detailed description of the snow cover, estimating the fractional snow cover area. The spectral albedo was obtained by a narrow band device that was compared to a full-range commercial system and to remotely sensed data acquired during the 2015 spring/summer period at the </span><span>Amundsen - Nobile</span><span> Climate Change Tower (Ny </span><span>Å</span><span>lesund). The results confirmed the possibility to have continuous observations of the snow surface (microphisical) characteristics and highlighted the opportunity to monitor the spectral variations of snowed surfaces during the melting period. It was possible, </span><span>therefore,</span><span> to estimate spectral indexes, such as NDSI and SWIR albedo, and to found interesting links between both features and air/ground temperatures, wind-speed and precipitations. Different melting phases were detected and different processes were associated with the observed spectral variations.</span></p>

Optical behaviour of hybrid LC/inorganic nanostructures

2006 ◽  
Author(s):  
Nicholas G. Wakefield ◽  
Anastasia L. Elias ◽  
Michael J. Brett ◽  
Jeremy C. Sit
Keyword(s):  
Optical Behaviour ◽  
Inorganic Nanostructures
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