Determination of the physical state of the human thorax by means of impedance plethysmography

1988 ◽  
Vol 71 (2) ◽  
pp. 99-105 ◽  
Author(s):  
M. Vlachogiannis ◽  
G. Kyriakou ◽  
C. Coucourlis ◽  
N. Gotsis ◽  
J. N. Sahalos
Keyword(s):  
Physical State ◽  
Impedance Plethysmography ◽  
Human Thorax

Is Quantitative Determination of Fibrin(ogen) Degradation Products and Thrombin-Antithrombin III Complexes Useful to Diagnose Deep Venous Thrombosis in Outpatients?

1989 ◽  
Vol 62 (04) ◽  
pp. 1043-1045 ◽  
Author(s):  
Paul F M M van Bergen ◽  
Eduard A R Knot ◽  
Jan J C Jonker ◽  
Auke C de Boer ◽  
Moniek P M de Maat
Keyword(s):  
Quantitative Determination ◽  
Venous Thrombosis ◽  
Deep Venous Thrombosis ◽  
Antithrombin Iii ◽  
Degradation Products ◽  
Family Doctor ◽  
Diagnostic Value ◽  
Impedance Plethysmography ◽  
Fibrin Degradation Products

SummaryWe studied the diagnostic value of recently introduced ELISA’s for the determination of thrombin-antithrombin III (TAT) complexes, fibrin degradation products (FbDP), fibrinogen degradation products (FgDP) and total degradation products (TDP) for deep venous thrombosis (DVT) in plasma of 239 consecutive outpatients, suspected for DVT by their family doctor. DVT was confirmed by impedance plethysmography in 60 patients. Using the 95th percentile range of 42 healthy volunteers the sensitivity for the detection of DVT was: 37% for TAT, 95% for TDP, 92% for FbDP and 90% for FgDP. Specificity was: 88% for TAT, 16% for TDP, 20% for FbDP and 25% for FgDP.We conclude that these assays are of little value in the diagnosis of DVT in outpatients.

scholarly journals IV. On the dynamical theory of incompressible viscous fluids and the determination of the criterion

1895 ◽  
Vol 186 ◽  
pp. 123-164 ◽  
Keyword(s):  
Singular Solution ◽  
Physical State ◽  
Theoretical Calculations ◽  
Equations Of Motion ◽  
Dynamical Theory ◽  
Viscous Fluids ◽  
Linear Functions ◽  
Incompressible Viscous Fluids ◽  
Theoretical Results

1. The equations of motion of viscous fluid (obtained by grafting on certain terms to the abstract equations of the Eulerian form so as to adapt these equations to the case of fluids subject to stresses depending in some hypothetical manner on the rates of distortion, which equations Navier seems to have first introduced in 1822, and which were much studied by Cauchy and Poisson) were finally shown by St. Venant and Sir Gabriel Stokes, in 1845, to involve no other assumption than that the stresses, other than that of pressure uniform in all directions, are linear functions of the rates of distortion, with a co-efficient depending on the physical state of the fluid. By obtaining a singular solution of these equations as applied to the case of pendulums in steady periodic motion, Sir G. Stokes was able to compare the theoretical results with the numerous experiments that had been recorded, with the result that the theoretical calculations agreed so closely with the experimental determinations as seemingly to prove the truth of the assumption involved. This was also the result of comparing the flow of water through uniform tubes with the flow calculated from a singular solution of the equations so long as the tubes were small and the velocities slow. On the other hand, these results, both theoretical and practical, were directly at variance with common experience as to the resistance encountered by larger bodies moving with higher velocities through water, or by water moving with greater velocities through larger tubes. This discrepancy Sir G. Stokes considered as probably resulting from eddies which rendered the actual motion other than that to which the singular solution referred and not as disproving the assumption.

Near-infrared reflectance spectrometry in the determination of the physical state of primary materials in pharmaceutical production

The Analyst ◽  
1995 ◽  
Vol 120 (4) ◽  
pp. 1005 ◽  
Author(s):  
Elena Dreassi ◽  
Giuseppe Ceramelli ◽  
Piero Corti ◽  
Silvano Lonardi ◽  
Piero Luigi Perruccio
Keyword(s):  
Physical State ◽  
Near Infrared ◽  
Infrared Reflectance ◽  
Near Infrared Reflectance ◽  
Reflectance Spectrometry ◽  
Pharmaceutical Production ◽  
Primary Materials

Calorific and Thermal Properties of Natural Rubber in the Oriented and Non-Oriented States

1956 ◽  
Vol 29 (3) ◽  
pp. 789-793
Author(s):  
B. I. Gengrinovich
Keyword(s):  
Thermal Properties ◽  
Natural Rubber ◽  
Physical State ◽  
Structural Characteristics ◽  
Amorphous State ◽  
Qualitative Change ◽  
Original Length ◽  
Degree Of Orientation ◽  
High Polymers

Abstract The structural characteristics of high polymers and the sharp dependence of their properties on the physical state create a need for a detailed study of these materials in the region where their physical state undergoes a qualitative change. Besides, a study of the phase transitions of high polymers which crystallize is of independent interest. The study of the transition of natural rubber from the oriented crystalline state to the non-oriented amorphous state was the problem of this work. The determination of calorific and thermal properties in the transition region was adopted as the method of investigation. It should be noted that, for rubbers, these properties have been studied to a much lesser extent than have the other thermodynamic properties, particularly the mechanical properties. In order to obtain crystalline rubber, strips of smoked sheet were subjected to repeated rapid stretching at 50°, followed by cooling of the stretched samples to 12–14° C. The stress applied to the rubber during stretching overcomes the deorienting effect of the thermal motion, which impedes the crystallization of non-deformed rubber. At the same time, the heating employed promotes a more complete straightening of the chains since, during heating, intermolecular action diminishes and the chaotically-grouped oriented portions of the macromolecules present in the samples are disrupted. Rapid cooling of the oriented rubber, obtained under such conditions, to temperatures below the melting point of the crystals which formed led to the preservation of the physical state, which was distinguished by an increase of the crystalline phase content, and by a higher degree of orientation, compared with the state of rubber crystallized during the same time by lowering the temperature without stretching. On an average, the extent of stretching amounted to 1400 per cent of the original length.

In Situ Determination of the Physical State of Biological Samples during Freeze Drying

2011 ◽  
Vol 29 (4) ◽  
pp. 461-471 ◽  
Author(s):  
Mathias Aschenbrenner ◽  
Ulrich Kulozik ◽  
Petra Foerst
Keyword(s):  
Biological Samples ◽  
Freeze Drying ◽  
Physical State

Determination of the physical state of salicylic acid in hydrogel formulations by X-ray diffractometry

1992 ◽  
Vol 78 (1-3) ◽  
pp. 77-83 ◽  
Author(s):  
R. Suryanarayanan ◽  
S. Venkatesh ◽  
L. Hodgin ◽  
P. Hanson
Keyword(s):  
Salicylic Acid ◽  
Physical State ◽  
X Ray

Preparation and Characterization of Broad-Spectrum Sunscreens Loaded Nanostructured Lipid Carrier

2013 ◽  
Vol 669 ◽  
pp. 67-71
Author(s):  
Yan Ling Chen ◽  
Qiang Xia
Keyword(s):  
Particle Size ◽  
Physical State ◽  
Retention Rate ◽  
Nanostructured Lipid Carrier ◽  
High Pressure Homogenization ◽  
Spectrophotometric Detection ◽  
Ultraviolet Absorbance ◽  
Organic Uv Filters

A comprehensive photoprotective formulation was developed to enhance photoprotection ,compared to a conventional nanoemulsion ,having the concentration of two new molecular sunscreens, namely Diethylamino hydyoxybenzoyl hexyl benzoate(Uvinul ® A Plus) and Ethylhexyl triazone(Uvinul® T 150). In the present paper, the sunscreen mixture was incorporated into nanostructured lipid carriers (NLCs). After the production by hot high pressure homogenization, the NLC were analyzed in terms of particle size, physical state, particle shape, ultraviolet absorbance and stability. The particle size for all NLC was around 100-900 nm after production. The determination of 2 organic UV filters was performed by HPLC with UV spectrophotometric detection. The loading capacities for molecular sunscreens was up to 30%. In the sunlight, the retention rate of Uvinul ® A Plus and Uvinul ® T150 was still up to 80% after three months .

Composition of Garnet in Anorthosite–Charnockite Suites: Bias and Precision in Electron-Probe Microanalysis

1973 ◽  
Vol 10 (8) ◽  
pp. 1257-1266 ◽  
Author(s):  
K. Schrijver
Keyword(s):  
Electron Probe Microanalysis ◽  
Electron Probe ◽  
Physical State ◽  
Total Iron ◽  
Electron Probe Microanalyzer ◽  
Unknown Species ◽  
Compositional Homogeneity

The composition of garnet in each of 11 specimens from anorthosite–charnockite suites (Marcy Massif, Morin Complex, Lac-Croche Complex) has been determined by electron-probe microanalyzer. All analyses include Si, Al, Fe, Mn, Mg, and Ca. The range of FeO (total iron as Fe2+) is from 26.5 to 34 wt.%; MnO from 0.5 to 2, MgO from 0.5 to 5, and CaO from 7 to 9.5 wt.%. TiO2 is present in very small amounts at most ([Formula: see text]?). The major end member molecule in all specimens is almandine.Bias and precision of the analysis have been estimated: (1) by replicate determination of the composition of a garnet standard in each analytical run on each of the unknown species and (2) by duplicate determination of the garnet species in each rock specimen.In general, inclusion of a known species, similar in composition and physical state to the unknown species, in each analytical run on an unknown will provide estimates of bias applicable to individual analyses as well as an overall estimate of bias applicable to the mode and circumstances of the particular series of runs on the electron-probe microanalyzer. The reliability of the estimates of bias so obtained depends mainly on the compositional homogeneity of both known and unknown species.

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