Development of a sensitive and selective laser diagnostic technique for measuring paramagnetic species

2021 ◽  
Author(s):  
Jamie Lee Lane
Keyword(s):  
Diagnostic Technique ◽  
Paramagnetic Species ◽  
Laser Diagnostic ◽  
Laser Diagnostic Technique

scholarly journals Study of synthesis and combustion of composite fuels based on n-decane and Al nanoparticles

2021 ◽  
Vol 2127 (1) ◽  
pp. 012011
Author(s):  
E V Barmina ◽  
M I Zhilnikova ◽  
V D Kobtsev ◽  
S A Kostritsa ◽  
S N Orlov ◽  
...  
Keyword(s):  
Mass Concentration ◽  
Diagnostic Technique ◽  
Average Diameter ◽  
Diffusion Combustion ◽  
Final Size ◽  
Al Nanoparticles ◽  
Temperature Distributions ◽  
Transmission Electron ◽  
Laser Diagnostic ◽  
Composite Fuel

Abstract The article is devoted to the analysis of a diffusion combustion of a composite fuel (formed by an addition of non-oxidized aluminum (Al) nanoparticles (NP’s) to n-decane) with oxygen. The process of obtaining Al NP’s consisted of a laser fragmentation of initially large commercially produced NP’s (so called “Alex” with mean diameter is about 450 nm) in the solution of isopropanol. A final size distribution of NP’s was determined by a CPS DC2400 measuring disk centrifuge. The morphology of NP’s was characterized with the Transmission Electron Microscope (TEM) JEM-100C. The measured average diameter of NP’s was about 40 nm. In the final step of a preparation of a composite fuel an isopropanol was exchanged on n-decane. To characterize the composite fuel, diffusion combustion was used in combination with the laser diagnostic technique CARS. Temperature distributions along the x direction were measured at two values of distances from the nozzle. It has been shown that, for the fuel consistent of 0.1% mass concentration of Al NP’s in n-decane, the temperature at the distance equaled 14 mm downstream from the nozzle exit of a burner in the vicinity of the flame front was significantly higher (by 200–300 K) than that upon burning of pure n-decane.

Particle Sizing Using Laser Diffraction

Volume 1 ◽  
2004 ◽  
Author(s):  
Badih A. Jawad ◽  
Chris H. Riedel ◽  
Ahmad Bazzari
Keyword(s):  
Diesel Fuel ◽  
Drop Size ◽  
Diagnostic Technique ◽  
Droplet Size Distribution ◽  
Laser Diffraction ◽  
Particle Sizing ◽  
Line Measurement ◽  
Accuracy Of Measurements ◽  
Laser Diagnostic ◽  
On Line

The laser diffraction technique constitute an easy and fast on line measurement of drop sizes. Based on the well known theory of diffraction, a laser diagnostic technique is described for the measurement of droplet size distribution. Limitations of the technique are studied to identify accuracy of measurements when applied to dense sprays (i.e. diesel fuel). Drop size measurements are then conducted for different diesel fuel under different conditions of injection and chamber pressures. Results lead to better understanding of the atomization process.

Aspiration cytology and transmission electron microscopy (TEM): A novel tissue-collection technique with useful diagnostic applications

1984 ◽  
Vol 42 ◽  
pp. 90-93
Author(s):  
J.A. Maksem ◽  
C. VanDyke ◽  
H.W. Carter ◽  
C.F. Galang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Diagnostic Technique ◽  
Needle Aspiration ◽  
Large Series ◽  
Aspiration Cytology ◽  
Fine Needle ◽  
Transmission Electron ◽  
Diagnostic Applications ◽  
Microscopic Slide

In the last decade fine needle aspiraration biopsy has gained recognition as a valuable diagnostic technique, and its benefits have been demonstrated in large series of patients with almost every type of tumor (1,2). The usual way to collect cellular material from needle-aspiration biopsies is to discharge the needle and syringe contents onto a microscopic slide and smear the material with another slide. The entire specimen is contained on the slides prepared at the time of biopsy. Serious technical difficulties are inherent to this method. 1) Inconsistent fixation, 2) drying artifact, 3) loss of tissue fragments, 4) inability to confirm impressions by a “second method”, and 5) retention of significant diagnostic material in the needle hub. Our technique avoids these difficulties.

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