Theory underlying determination of stressed state in composite media with aid of electromagnetic waves in millimeter range

1983 ◽  
Vol 18 (5) ◽  
pp. 625-628
Author(s):  
I. P. Vasil'chenko ◽  
M. P. Malezhik
Keyword(s):  
Stressed State ◽  
Electromagnetic Waves ◽  
Composite Media

Determination of the velocity of short electromagnetic waves by interferometry

1952 ◽  
Vol 213 (1112) ◽  
pp. 123-141 ◽  
Keyword(s):  
Phase Velocity ◽  
Electromagnetic Radiation ◽  
Free Space ◽  
Electromagnetic Waves ◽  
Wave Beam ◽  
Wave Length ◽  
Wave Frequency ◽  
Space Wave

A new measurement of the velocity of electromagnetic radiation is described. The result has been obtained, using micro-waves at a frequency of 24005 Mc/s ( λ = 1∙25 cm), with a form of interferometer which enables the free-space wave-length to be evaluated. Since the micro-wave frequency can also be ascertained, phase velocity is calculated from the product of frequency and wave-length. The most important aspect of the experiment is the application to the measured wave-length of a correction which arises from diffraction of the micro-wave beam. This correction is new to interferometry and is discussed in detail. The result obtained for the velocity, reduced to vacuum conditions, is c 0 = 299792∙6 ± 0∙7 km/s.

scholarly journals Clay-Based Affinity Probes for Selective Cleanup and Determination of Aflatoxin B1 Using Nanostructured Montmorillonite on Quartz

2003 ◽  
Vol 86 (3) ◽  
pp. 534-539 ◽  
Author(s):  
Henry J Huebner ◽  
Timothy D Phillips
Keyword(s):  
Aflatoxin B1 ◽  
Composite Media ◽  
Enthalpy Of Adsorption ◽  
Composite Columns ◽  
High Affinity ◽  
Composite Adsorbents ◽  
Immunoaffinity Columns ◽  
Affinity Probes ◽  
Linear Trends

Abstract A study was conducted to investigate the selective cleanup and determination of aflatoxin B1 (AfB1) from contaminated media. Composite adsorbents were formulated from calcium montmorillonite clay, which possesses a high affinity and enthalpy of adsorption for AfB1. Nanostructuring techniques were used to construct various formulations of the clay-based composite media. In AfB1 adsorption studies with prototypical affinity columns, these composites offered narrowly defined, reproducible capacity ranges. Composite recoveries of AfB1 from spiked grains exhibited linear trends that correlated well with the range of spike levels. Composite columns provided lower recoveries of AfB1 from naturally contaminated corn than did immunoaffinity columns; however, recoveries were consistent and purified extracts were free of inter-fering compounds, as determined by liquid chro-matography with fluorescence detection.

Determination of the Stressed State of the Wall of Fuel Tank of a Rocket Carrier by the Digital Optical Method

2019 ◽  
Vol 54 (5) ◽  
pp. 678-684
Author(s):  
Ya. L. Ivanyts’kyi ◽  
O. P. Maksymenko ◽  
Yu. V. Mol’kov ◽  
D. V. Klymenko ◽  
Yu. Yu. Varyvoda ◽  
...  
Keyword(s):  
Stressed State ◽  
Optical Method ◽  
Fuel Tank ◽  
Rocket Carrier
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