Development of non-destructive methods for the determination of airborne pollutants in pine needles: identification of trace constituents in radiata pine epicuticular wax

1993 ◽  
Vol 347 (8-9) ◽  
pp. 337-343 ◽  
Author(s):  
Robert A. Franich ◽  
Eva Jakobsson ◽  
S�ren Jensen ◽  
Hank W. Kroese ◽  
Henrik Kylin
Keyword(s):  
Radiata Pine ◽  
Epicuticular Wax ◽  
Pine Needles ◽  
Airborne Pollutants ◽  
Trace Constituents ◽  
Non Destructive ◽  
Destructive Methods

scholarly journals Portable XRF: A Tool for the Study of Corundum Gems

2017 ◽  
Vol 3 (1) ◽  
Author(s):  
Germana Barone ◽  
Paolo Mazzoleni ◽  
Danilo Bersani ◽  
Simona Raneri
Keyword(s):  
Spectroscopic Techniques ◽  
Portable Xrf ◽  
Correct Evaluation ◽  
Non Invasive ◽  
Heritage Studies ◽  
Origin Determination ◽  
Non Destructive ◽  
Xrf Spectroscopy ◽  
Destructive Methods

AbstractOrigin of gemstones is a key aspect not only in gemological field but also in Cultural Heritage studies, for the correct evaluation of precious artifacts. The studies on gems require the application of non-invasive and non-destructive methods; among them, portable spectroscopic techniques has been demonstrated as powerful tools, providing a fingerprint of gems for origin and provenance determination. In this study, portable XRF spectroscopy has been applied to test the potential of the technique for the origin determination of corundum gems. The obtained results allowed distinguishing natural and synthetic rubies and sapphires.

Selected Non-Destructive Methods Suitable for Evaluation of Roofing Slate

2014 ◽  
Vol 923 ◽  
pp. 63-70 ◽  
Author(s):  
Martin Vavro ◽  
Kamil Souček ◽  
Tomáš Daněk ◽  
Lubomír Staš
Keyword(s):  
Natural Material ◽  
Petrographic Analysis ◽  
Historical Buildings ◽  
Reliable Determination ◽  
X Ray ◽  
New Methods ◽  
Traditional Natural ◽  
Non Destructive ◽  
Destructive Methods

Roofing slate is a traditional natural material for roofing and other construction applications in various types of buildings. The paper deals with both traditional methods of mineralogical-petrographic analysis as well as completely new methods (X-ray CT) rendering fast and reliable determination of qualitative parameters and potential slate durability in building constructions. A mutual combination of the methods represents a rapid, effective and modern alternative to lengthy laboratory tests to determine physical-mechanical properties of newly used roofing, especially in historical buildings.

Non-destructive Raman Spectroscopic Determination of Freshwater Mollusk Composition, Growth, and Damage Repair

The Analyst ◽  
2021 ◽  
Author(s):  
Grace Sarabia ◽  
Bhavya Sharma
Keyword(s):  
Climate Change ◽  
Endangered Species ◽  
Aquatic Habitat ◽  
Spectroscopic Determination ◽  
Raman Spectroscopic ◽  
Freshwater Mollusk ◽  
Damage Repair ◽  
Non Destructive ◽  
Destructive Methods

Increased acidification of aquatic habitat due to climate change is damaging mollusks. Non-destructive methods for analysis are necessary to study these endangered species. We analyzed five Unionidae gastropods using Raman...

scholarly journals IMPROVEMENT OF THE METHOD OF CONCRETE PHYSICAL AND MECHANICAL PROPERTIES DETERMINATION BY NON-DESTRUCTIVE METHODS

2021 ◽  
pp. 82-89
Author(s):  
V.V. Kolokhov ◽  
Keyword(s):  
Stress Level ◽  
Mechanical Characteristics ◽  
Concrete Strength ◽  
Hydraulic Press ◽  
Structural Element ◽  
Normative Documents ◽  
Non Destructive ◽  
Destructive Methods ◽  
Physical And Mechanical Characteristics

Abstract. To ensure the reliability of existing buildings, facilities and building structures, objective information is required, the receipt of which is mainly associated with the use of non-destructive methods of control. Current normative documents regulate the strength and deformability characteristics of the material, which are used mainly in the design of structures. The normalized value is obtained on the basis of probabilistic and statistical processing and is characterized by some conditional value. Improvement of methods of calculation of constructions connected with the account of elastic-plastic properties of concrete is based on application of the standardized diagrams of work of concrete received on the basis of laboratory experiments. In the real structure due to differences in the composition of laboratory and real concrete, technologies of its manufacture and laying, there may be significant differences from the acquired value "Concrete strength" and "Modulus of elasticity", which was taken to calculate the structure. The above-mentioned influence of the stress level on the readings of the device in determining the strength of concrete by non-destructive testing methods was investigated on concrete samples of six different compositions. Concrete cubes measuring 150×150×150 mm were used to study the stated assumptions. The determination of the strength of concrete samples by the non-destructive method was performed. A sclerometer (Schmidt's Hammer MSH-225) was used to determine, which implements the method of elastic rebound. The determination was performed at different load levels, which was added to the test sample, followed by determination of the strength of concrete on a hydraulic press with a load up to 1250 kN. The analysis of the obtained results shows that the attempt to obtain a generalized calibration curve, which would take into account the change in the stress level in the structure, leads to a decrease in the accuracy of determining the physical and mechanical characteristics of concrete. The presented dependences demonstrate the significance of the influence of the stress level in the structural element on the results of determining the physical and mechanical characteristics of concrete by non-destructive methods. The analysis of these dependences shows the need to modernize non-destructive methods for determining the physical and mechanical characteristics of concrete.

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