Quantitative analysis of sea-bed sediments from Eastern Black Sea by EDXRF spectrometry

1995 ◽  
Vol 201 (3) ◽  
pp. 241-249 ◽  
Author(s):  
U. Çevik ◽  
A. I. Kopya ◽  
H. Karal ◽  
Y. Sahin
Keyword(s):  
Quantitative Analysis ◽  
Black Sea ◽  
Bed Sediments ◽  
Sea Bed

Aspects of the sea bed sediments in the southern Irish Sea

1987 ◽  
Vol 98 (4) ◽  
pp. 404-406
Author(s):  
J.W.C. James ◽  
R.T.R. Wingfield
Keyword(s):  
Irish Sea ◽  
Bed Sediments ◽  
Sea Bed

Determination of caesium and natural radionuclide concentrations in sediments, algae and water on the Bulgarian Black Sea coast

1999 ◽  
Vol 39 (8) ◽  
pp. 21-26 ◽  
Author(s):  
A. Strezov ◽  
T. Stoilova ◽  
A. Jordanova ◽  
M. Ayranov ◽  
N. Petkov
Keyword(s):  
Black Sea ◽  
Sea Water ◽  
Natural Radionuclides ◽  
Natural Radionuclide ◽  
Sea Bed ◽  
Natural Gamma ◽  
Radionuclide Distribution ◽  
Bryopsis Plumosa ◽  
Sandy Sediments

Determination of anthropogenic and natural radionuclide distribution along the Bulgarian Black Sea coastal area has been performed by low level gamma spectrometry. Results were obtained for different types of environmental samples: sea bed sediments, eight types of algae species and sea water. Monitoring for 35 sampling sites has been performed from 1991 to 1996. A comparison between the results of nuclide content in algae and sediments was made. The data obtained show that radionuclide concentrations depend strongly on the sediment nature (sand, sandy, silt, slime). Small variations of nuclide content in sand and sandy sediments are obtained, while the variations for slime and silt sediments are greater. The concentrations of artificial and natural gamma emitters in algae depend mainly on the algae species type. The content of most natural radionuclides in algae is close to the LLD except those for the species Bryopsis plumosa. The results for the nuclide concentration values in Black Sea sediments and algae will enable the creation of a database and assessment of radionuclide transfer and accumulation trends in marine ecosystems.

scholarly journals Validation of a Quantitative Analysis Method for Collagen Extracted from Grey Mullet Marine Fish

2019 ◽  
Vol 70 (3) ◽  
pp. 835-842
Author(s):  
Rodica Sirbu ◽  
Gabriela Stanciu ◽  
Emin Cadar ◽  
Aneta Tomescu ◽  
Melat Cherim
Keyword(s):  
Quantitative Analysis ◽  
Black Sea ◽  
Absorption Spectrometry ◽  
Research Area ◽  
Performance Criteria ◽  
The Black Sea ◽  
Grey Mullet ◽  
Analysis Method ◽  
Molecular Absorption Spectrometry ◽  
Quantitative Analysis Method

The Black Sea offers numerous harnessing possibilities for the medical and pharmaceutical, agricultural, food industry and cosmetic fields. Collagen extraction from the Black Sea fish is a research area of great interest. The purpose of this paper is to optimize the collagen quantitative analysis method based on hydroxyproline reagent through visible molecular absorption spectrometry. The adapted method was validated, achieving the following performance criteria: linearity, detection and quantification limits, accuracy/fidelity, stability/sturdiness, repeatability, and measurement uncertainty. The validated method was applied for the quantitative determination of collagen content in Grey Mullet fish and for the evaluation of collagen extraction output.

An Improved Quantitative Image Analyser

1977 ◽  
Vol 35 ◽  
pp. 226-227
Author(s):  
J.P. Fallon ◽  
P.J. Gregory ◽  
C.J. Taylor
Keyword(s):  
Feature Extraction ◽  
Quantitative Analysis ◽  
Frequency Content ◽  
General Sense ◽  
Physical Measurements ◽  
Quantitative Image ◽  
Image Analyser ◽  
Automatic Methods ◽  
Quantitative Results

Quantitative image analysis systems have been used for several years in research and quality control applications in various fields including metallurgy and medicine. The technique has been applied as an extension of subjective microscopy to problems requiring quantitative results and which are amenable to automatic methods of interpretation.Feature extraction. In the most general sense, a feature can be defined as a portion of the image which differs in some consistent way from the background. A feature may be characterized by the density difference between itself and the background, by an edge gradient, or by the spatial frequency content (texture) within its boundaries. The task of feature extraction includes recognition of features and encoding of the associated information for quantitative analysis.Quantitative Analysis. Quantitative analysis is the determination of one or more physical measurements of each feature. These measurements may be straightforward ones such as area, length, or perimeter, or more complex stereological measurements such as convex perimeter or Feret's diameter.

Quantification of Silica Uptake by Alveolar Macrophages - An Emperical Scanning Electron Microprobe Method

1982 ◽  
Vol 40 ◽  
pp. 332-333
Author(s):  
V. V. Damiano ◽  
R. P. Daniele ◽  
H. T. Tucker ◽  
J. H. Dauber
Keyword(s):  
Quantitative Analysis ◽  
Alveolar Macrophages ◽  
Bulk Sample ◽  
Silica Particles ◽  
Empirical Method ◽  
Phagocytic Cells ◽  
Calibration Standards ◽  
X Ray ◽  
Accurate Quantitative Analysis ◽  
Scanning Electron

An important example of intracellular particles is encountered in silicosis where alveolar macrophages ingest inspired silica particles. The quantitation of the silica uptake by these cells may be a potentially useful method for monitoring silica exposure. Accurate quantitative analysis of ingested silica by phagocytic cells is difficult because the particles are frequently small, irregularly shaped and cannot be visualized within the cells. Semiquantitative methods which make use of particles of known size, shape and composition as calibration standards may be the most direct and simplest approach to undertake. The present paper describes an empirical method in which glass microspheres were used as a model to show how the ratio of the silicon Kα peak X-ray intensity from the microspheres to that of a bulk sample of the same composition correlated to the mass of the microsphere contained within the cell. Irregular shaped silica particles were also analyzed and a calibration curve was generated from these data.

Lateral resolution of the electron microbeam analysis

1978 ◽  
Vol 36 (1) ◽  
pp. 542-543
Author(s):  
H.J. Dudek
Keyword(s):  
Quantitative Analysis ◽  
Depth Resolution ◽  
Lateral Resolution ◽  
Cylindrical Particle ◽  
Correction Procedure ◽  
X Ray ◽  
Element Concentrations ◽  
Microbeam Analysis ◽  
The Matrix

The chemical inhomogenities in modern materials such as fibers, phases and inclusions, often have diameters in the region of one micrometer. Using electron microbeam analysis for the determination of the element concentrations one has to know the smallest possible diameter of such regions for a given accuracy of the quantitative analysis.In th is paper the correction procedure for the quantitative electron microbeam analysis is extended to a spacial problem to determine the smallest possible measurements of a cylindrical particle P of high D (depth resolution) and diameter L (lateral resolution) embeded in a matrix M and which has to be analysed quantitative with the accuracy q. The mathematical accounts lead to the following form of the characteristic x-ray intens ity of the element i of a particle P embeded in the matrix M in relation to the intensity of a standard S

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