scholarly journals Investigation of the Laser Radiation Effects on Lignite with the Products Analysis by Mass Spectrometry

2020 ◽  
Vol 22 (1) ◽  
pp. 3
Author(s):  
Y.V. Kraft ◽  
D.R. Nurmukhametov ◽  
B.P. Aduev ◽  
Z.R. Ismagilov
Keyword(s):  
Mass Spectrometry ◽  
Laser Radiation ◽  
Radiation Effects ◽  
Calorific Value ◽  
Charge Ratio ◽  
Reaction Products ◽  
Pulsed Laser Radiation ◽  
Gaseous Reaction ◽  
Coal Particles ◽  
Products Analysis

In this paper, one studied the effect of pulsed laser radiation (1064 nm, 120 μs) on lignite. The method of mass spectrometry was used to analyze the formed gaseous reaction products after the exposing of coal samples to the laser radiation. The pressed out of the pre-milled coal particles tablets were used as samples. In the mass spectra of the reaction products of laser radiation of the samples, the peaks with a mass to ion charge ratio m/z = 2, 18, 44 were detected, that corresponds to the main peaks of H2, H2O, and CO2 molecules. The pattern of formation of the end products CO2, H2, H2O when heating a sample of coal by laser radiation is proposed. The energy release factor is calculated, which is defined as the ratio of the calorific value, released during combustion of the sample to the dose of energy absorbed by the sample during irradiation.

Pulsed laser radiation effects on the distribution of conduction velocities in sciatic nerve of the rat

1990 ◽  
Author(s):  
Shien-Fong Lin ◽  
Ursula Wesselmann ◽  
William Z. Rymer
Keyword(s):  
Laser Radiation ◽  
Sciatic Nerve ◽  
Radiation Effects ◽  
Pulsed Laser ◽  
Pulsed Laser Radiation ◽  
Conduction Velocities

MODEL AND METHOD OF CONTROLLED PYROLYSIS OF ORGANIC SUBSTANCES OF VARIABLE COMPOSITION

2021 ◽  
Vol 1 ◽  
pp. 134
Author(s):  
Konstantin V. Beglov ◽  
◽  
Alexander I. Brunetkin ◽  
Maxim M. Maximov ◽  
Elena O. Ulitskaya ◽  
...  
Keyword(s):  
Water Vapor ◽  
Calorific Value ◽  
Variable Composition ◽  
Simultaneous Increase ◽  
Organic Substances ◽  
Reaction Products ◽  
Gaseous Reaction ◽  
Energy Value ◽  
Gaseous Products ◽  
Gasification Process

The issues of organization of the process of slow pyrolysis of organic substances, in the general case of unknown and variable composition, are considered. The relevance of the work is determined by considering the possibility of using various organic waste (domestic, agricultural, industrial) without their preliminary sorting and drying to obtain secondary energy resources of a known (controlled) composition. The novelty of the work is due to the development of a model for the method of controlled pyrolysis or gasification of organic substances with a minimum amount of solid residues at a maximum calorific value of the resulting mixture of combustible gases. A process based on filtration combustion in superadiabatic mode is considered. In existing devices, when this mode is implemented, a counter flow of the feedstock and reaction products is organized. As a result, a part of the water vapor generated at the drying stage is part of the mixture of reaction products and, accordingly, reduce their energy value. The scheme of the process proposed for consideration is based on the organization of the associated flow of feedstock and reaction products. As a result, the resulting carbon dioxide and water vapor are used as additional oxidizing agents. As a result, the carbonaceous residue decreases with a simultaneous increase in the composition of the mixture of gaseous products of carbon monoxide and hydrogen. A scheme for real-time monitoring of the composition of the feedstock during pyrolysis (gasification) is proposed. Knowledge of the composition makes it possible to control the process of its processing in order to: a) organize the optimal gasification process in terms of maximizing the amount and energy value of the mixture of gaseous reaction products; b) control the consumption of the processed feedstock in order to produce the required amount of product gas at any given time.

Influence of Continuous and Pulsed Laser Radiation on Optical and Thermal Properties of Biological Tissues

2014 ◽  
Vol 59 (12) ◽  
pp. 1149-1154
Author(s):  
A.D. Mamuta ◽  
◽  
V.S. Voitsekhovich ◽  
N.M. Kachalova ◽  
L.F. Golovko ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Laser Radiation ◽  
Pulsed Laser ◽  
Biological Tissues ◽  
Pulsed Laser Radiation

Drilling of cooling holes by using high power ultrashort pulsed laser radiation

2014 ◽  
Author(s):  
Hermann Uchtmann ◽  
Marcel Friedrichs ◽  
Ingomar Kelbassa
Keyword(s):  
Laser Radiation ◽  
High Power ◽  
Pulsed Laser ◽  
Pulsed Laser Radiation ◽  
Ultrashort Pulsed Laser

scholarly journals Imaging Mass Spectrometry-Based Proteomic Analysis to Differentiate Melanocytic Nevi and Malignant Melanoma

Cancers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 3197
Author(s):  
Rita Casadonte ◽  
Mark Kriegsmann ◽  
Katharina Kriegsmann ◽  
Isabella Hauk ◽  
Rolf R. Meliß ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Malignant Melanoma ◽  
Operating Characteristic ◽  
Characteristic Curve ◽  
Imaging Mass Spectrometry ◽  
Independent Set ◽  
Molecular Techniques ◽  
Charge Ratio ◽  
Linear Discriminant ◽  
Melanocytic Nevi

The discrimination of malignant melanoma from benign nevi may be difficult in some cases. For this reason, immunohistological and molecular techniques are included in the differential diagnostic toolbox for these lesions. These methods are time consuming when applied subsequently and, in some cases, no definitive diagnosis can be made. We studied both lesions by imaging mass spectrometry (IMS) in a large cohort (n = 203) to determine a different proteomic profile between cutaneous melanomas and melanocytic nevi. Sample preparation and instrument setting were tested to obtain optimal results in term of data quality and reproducibility. A proteomic signature was found by linear discriminant analysis to discern malignant melanoma from benign nevus (n = 113) with an overall accuracy of >98%. The prediction model was tested in an independent set (n = 90) reaching an overall accuracy of 93% in classifying melanoma from nevi. Statistical analysis of the IMS data revealed mass-to-charge ratio (m/z) peaks which varied significantly (Area under the receiver operating characteristic curve > 0.7) between the two tissue types. To our knowledge, this is the largest IMS study of cutaneous melanoma and nevi performed up to now. Our findings clearly show that discrimination of melanocytic nevi from melanoma is possible by IMS.

Influence of pulsed laser radiation on the morphology and photoelectric properties of InSb crystals

2003 ◽  
Vol 37 (4) ◽  
pp. 396-398 ◽  
Author(s):  
V. A. Gnatyuk ◽  
O. S. Gorodnychenko
Keyword(s):  
Laser Radiation ◽  
Pulsed Laser ◽  
Pulsed Laser Radiation ◽  
Photoelectric Properties

scholarly journals Effects of pulsed laser radiation on epitaxial self-assembled Ge quantum dots grown on Si substrates

2011 ◽  
Vol 22 (29) ◽  
pp. 295304 ◽  
Author(s):  
A Pérez del Pino ◽  
E György ◽  
I C Marcus ◽  
J Roqueta ◽  
M I Alonso
Keyword(s):  
Quantum Dots ◽  
Laser Radiation ◽  
Pulsed Laser ◽  
Pulsed Laser Radiation ◽  
Si Substrates ◽  
Ge Quantum Dots ◽  
Self Assembled

Treatment of ultrafine aluminum alloys with pulsed laser radiation

2007 ◽  
Vol 36 (5) ◽  
pp. 467-470 ◽  
Author(s):  
P. Yu. Kikin ◽  
V. N. Perevezentsev ◽  
A. I. Pchelintsev ◽  
E. E. Rusin
Keyword(s):  
Laser Radiation ◽  
Aluminum Alloys ◽  
Pulsed Laser ◽  
Pulsed Laser Radiation ◽  
Ultrafine Aluminum
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