scholarly journals Determination of internal reflectance for photonic glasses

2019 ◽  
Vol 99 (5) ◽  
Author(s):  
S. E. Han ◽  
S. Atiganyanun ◽  
S. H. Lee ◽  
S. Cheek ◽  
S. M. Han
Keyword(s):  
Internal Reflectance

scholarly journals Internal Reflectance Modelling ofHordeum vulgareLeaves During Drying

2013 ◽  
Vol 2013 ◽  
pp. 1-7
Author(s):  
Miroslav Kvíčala ◽  
Eva Lacková ◽  
Michaela Štamborská
Keyword(s):  
Spectral Reflectance ◽  
Spring Barley ◽  
Plant Stress ◽  
Photosynthetic Apparatus ◽  
Physical Modelling ◽  
Functional Condition ◽  
Strongly Correlated ◽  
Barley Leaves ◽  
Internal Reflectance

Spectral reflectance, or indexes that characterize spectral reflectance at concrete wavelength, is commonly used as an indicator of plant stress, or its photosynthetic apparatus status. In this paper, new leaf optical model is presented. Within this paper, experimental determination of surface and internal reflectance of Spring barley leaves and mathematical-physical modelling of internal reflectance were performed. It was proven that a new proposed theoretical model and the experimental spectra of internal reflectance are strongly correlated. It can be concluded that the total reflectance is not a function of epidermis condition, but it testifies about overall functional condition of Spring barley leaves.

Spectroelectrochemical Sensing Based on Attenuated Total Internal Reflectance Stripping Voltammetry. 2. Determination of Mercury and Lead

2004 ◽  
Vol 76 (5) ◽  
pp. 1458-1465 ◽  
Author(s):  
Anne T. Maghasi ◽  
Sean D. Conklin ◽  
Tanya Shtoyko ◽  
Aigars Piruska ◽  
John N. Richardson ◽  
...  
Keyword(s):  
Stripping Voltammetry ◽  
Spectroelectrochemical Sensing ◽  
Total Internal Reflectance ◽  
Internal Reflectance

Spectroelectrochemical Sensing Based on Attenuated Total Internal Reflectance Stripping Voltammetry. 3. Determination of Cadmium and Copper

2004 ◽  
Vol 76 (5) ◽  
pp. 1466-1473 ◽  
Author(s):  
Tanya Shtoyko ◽  
Sean Conklin ◽  
Anne T. Maghasi ◽  
John N. Richardson ◽  
Aigars Piruska ◽  
...  
Keyword(s):  
Stripping Voltammetry ◽  
Spectroelectrochemical Sensing ◽  
Total Internal Reflectance ◽  
Internal Reflectance

scholarly journals HYGIENIC ASPECTS OF ENDO- AND EXOGENIC METHODS OF PREVENTION OF CARIES AND THEIR EFFICIENCY IN THE REMINERALIZATION OF TEETH ENAMEL

2018 ◽  
Vol 97 (8) ◽  
pp. 710-713
Author(s):  
Yuriy A. Ippolitov ◽  
Ya. A. Plotnikova ◽  
P. V. Seredin ◽  
D. L. Goloshchapov ◽  
M. V. Berkovich
Keyword(s):  
Chemical Composition ◽  
Tooth Decay ◽  
Mixed Saliva ◽  
The Relationship ◽  
Molecular Balance ◽  
Tooth Tissue ◽  
Internal Reflectance ◽  
Tissue Material ◽  
Clinical Determination

According to the dental survey, the prevalence of caries in 33-45 years aged adults amounts to 98%. Studies of the effectiveness of prevention of tooth decay have shown the effectiveness of this direction. But the exogenous methods do not guarantee the restoration of the balance between the processes of demineralization and remineralization of the enamel. Demineralizing factors will prevail if the concentration of essential minerals in the mixed saliva is reduced. Therefore, it is necessary to develop endogenous techniques that will promote the process of remineralization of enamel and normalization of the ion-molecular balance. The aim of the study was to compare endogenous or exogenous methods in order to saturate mixed saliva with mineral complexes in preventing the development of primary demineralization of hard tooth tissue. Material and methods. The chemical composition of the mixed saliva sediment in 27 patients was analyzed by IR spectroscopy. To record the measurement of IR spectra, a Vertex-70 spectrometer (Bruker, Germany) and a PLATINUMATR full internal reflectance attachment with a diamond prism were used, as well as a clinical determination of the enamel remineralization rate (COSRE test) was performed. Results and Discussion. The relationship between the use of endogenous and exogenous methods of saturation of mixed saliva with mineral complexes and changes occurring in its molecular composition has been revealed, in favor of the effectiveness of endogenous methods.

Determination of Methanol and Methyl tert-Butyl Ether in Gasoline by Infrared Spectroscopy Using the CIRCLE® Cell and Multivariate Calibration

1993 ◽  
Vol 47 (7) ◽  
pp. 1036-1039 ◽  
Author(s):  
Francisco X. Garcia ◽  
Lola De Lima ◽  
Julio C. Medina
Keyword(s):  
Multivariate Calibration ◽  
Matrix Effects ◽  
Methyl Tert Butyl Ether ◽  
Butyl Ether ◽  
Tert Butyl ◽  
Oxygenated Compounds ◽  
Bond Stretching ◽  
Internal Reflectance ◽  
Good Agreement

The feasibility of predicting concentrations of methanol and methyl tert-butyl ether (MTBE) in gasolines from the mid-infrared absorption spectra was investigated. The C-O bond stretching band region was related to these oxygenated compounds' levels with the aid of multivariate statistics. The sample spectra were taken with the use of a circular internal reflectance (CIRCLE®) cell. With the use of partial least-squares (PLS) regression a model with 18 samples was built and used to predict a set of 10 gasolines with good agreement. Two additional samples prepared with other brands of gasoline were analyzed with the same model and no matrix effects were found.

Spectroelectrochemical Sensing Based on Attenuated Total Internal Reflectance Stripping Voltammetry. 1. Determination of Lead and Cadmium

2003 ◽  
Vol 75 (17) ◽  
pp. 4585-4590 ◽  
Author(s):  
Tanya Shtoyko ◽  
Anne T. Maghasi ◽  
John N. Richardson ◽  
Carl J. Seliskar ◽  
William R. Heineman
Keyword(s):  
Stripping Voltammetry ◽  
Lead And Cadmium ◽  
Spectroelectrochemical Sensing ◽  
Total Internal Reflectance ◽  
Internal Reflectance
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