scholarly journals Practical Estimation of Amorphous Solubility Enhancement Using Thermoanalytical Data: Determination of the Amorphous/Crystalline Solubility Ratio for Pure Indomethacin and Felodipine

2016 ◽  
Vol 105 (9) ◽  
pp. 2625-2630 ◽  
Author(s):  
Peter J. Skrdla ◽  
Philip D. Floyd ◽  
Philip C. Dell'orco
Keyword(s):  
Solubility Enhancement ◽  
Thermoanalytical Data ◽  
Solubility Ratio ◽  
Amorphous Solubility

Determination of alveolar capillary temperature

1963 ◽  
Vol 18 (1) ◽  
pp. 107-113 ◽  
Author(s):  
A. W. T. Edwards ◽  
T. Velasquez ◽  
L. E. Farhi
Keyword(s):  
Technical Assistance ◽  
Regression Line ◽  
Direct Determination ◽  
Inert Gases ◽  
Arterial Blood ◽  
Pulmonary Capillary ◽  
Pulmonary Capillary Blood ◽  
Solubility Ratio ◽  
Capillary Temperature

Since the alveolar temperature influences the solubility of most inert gases in pulmonary capillary blood, knowledge of the solubility in arterial blood may be used to determine the equilibration temperature, i.e., alveolar temperature. Because the partial pressure of inert gas in arterial blood cannot be deduced from the alveolar pressure, direct determination of solubility is impractical. However, if a mixture of two inert gases is used, the ratio of partial pressures in the arterial blood is equal to that in the inspired gas and the ratio of gas contents will vary with the ratio of solubility. The blood solubility ratio He/A varies by 1.34% per degree centigrade. Using an O2-He-A inspired mixture, the following points were established in five resting subjects, fully clothed. 1) The pulmonary capillary temperature (Tpc) is linearly related to the rectal temperature (Tr), with a regression line equation: Tpc = 37.5 + 2.4 (Tr – 37.1). 2) When measurements were obtained on the same subject in different days, these measurements show that variations in Tpc are in the same direction as changes in Tr, but much more pronounced. Note: (With the Technical Assistance of M. Passke) Submitted on July 24, 1962

The preparation of the salts of heteropolyacids by tempering a mixture of the solid components

1987 ◽  
Vol 52 (6) ◽  
pp. 1468-1479 ◽  
Author(s):  
Milan Drátovský ◽  
Jiří Mosinger
Keyword(s):  
Melting Point ◽  
Empirical Formula ◽  
Pure State ◽  
Computer Programs ◽  
Computation Method ◽  
Thermoanalytical Data ◽  
New Compounds ◽  
Prolonged Tempering

The method of prolonged tempering of a mixture of the solid components Na4As2O7 + ZO3 + Na2ZO4 (Z = Mo, W) was successfully used to prepare new compounds in the pure state and thermoanalytical analysis yielded the empirical formula, Na24As2Z22O83. The two compounds melt congruently and have a melting point of 597 °C (Z = Mo) and 691 °C (Z = W). To make the determination of the empirical formula more objective, a computation method was developed for treatment of the thermoanalytical data and two computer programs were written.

scholarly journals Approximations to the Non-Isothermal Distributed Activation Energy Model for Biomass Pyrolysis Using the Rayleigh Distribution

2017 ◽  
Vol 20 (3) ◽  
pp. 78-84 ◽  
Author(s):  
Alok Dhaundiyal ◽  
Suraj B. Singh
Keyword(s):  
Activation Energy ◽  
Numerical Solutions ◽  
Frequency Factor ◽  
Rayleigh Distribution ◽  
Energy Model ◽  
Biomass Pyrolysis ◽  
Distributed Activation Energy Model ◽  
Scale Parameters ◽  
Thermoanalytical Data

AbstractThis paper deals with the influence of some parameters relevant to biomass pyrolysis on the numerical solutions of the nonisothermalnthorder distributed activation energy model using the Rayleigh distribution. Investigated parameters are the integral upper limit, the frequency factor, the heating rate, the reaction order and the scale parameters of the Rayleigh distribution. The influence of these parameters has been considered for the determination of the kinetic parameters of the non-isothermalnthorder Rayleigh distribution from the experimentally derived thermoanalytical data of biomass pyrolysis.

Nuances in the Calculation of Amorphous Solubility Enhancement Ratio

2019 ◽  
Vol 108 (11) ◽  
pp. 3560-3574 ◽  
Author(s):  
Arushi Manchanda ◽  
Mary S. Kleppe ◽  
Robin H. Bogner
Keyword(s):  
Solubility Enhancement ◽  
Enhancement Ratio ◽  
Amorphous Solubility

Galactic orbits of stars

1966 ◽  
Vol 25 ◽  
pp. 93-97
Author(s):  
Richard Woolley
Keyword(s):  
Globular Cluster ◽  
Potential Field ◽  
High Velocity ◽  
Velocity Vector ◽  
Variable Stars ◽  
The Sun ◽  
Proper Motions ◽  
Rr Lyrae ◽  
The Galaxy

It is now possible to determine proper motions of high-velocity objects in such a way as to obtain with some accuracy the velocity vector relevant to the Sun. If a potential field of the Galaxy is assumed, one can compute an actual orbit. A determination of the velocity of the globular clusterωCentauri has recently been completed at Greenwich, and it is found that the orbit is strongly retrograde in the Galaxy. Similar calculations may be made, though with less certainty, in the case of RR Lyrae variable stars.

Distance to SN 1987A and the LMC

1999 ◽  
Vol 190 ◽  
pp. 549-554
Author(s):  
Nino Panagia
Keyword(s):  
Angular Size ◽  
Large Magellanic Cloud ◽  
Magellanic Cloud ◽  
Light Curves ◽  
Distance Modulus ◽  
Absolute Size ◽  
Sn 1987A

Using the new reductions of the IUE light curves by Sonneborn et al. (1997) and an extensive set of HST images of SN 1987A we have repeated and improved Panagia et al. (1991) analysis to obtain a better determination of the distance to the supernova. In this way we have derived an absolute size of the ringRabs= (6.23 ± 0.08) x 1017cm and an angular sizeR″ = 808 ± 17 mas, which give a distance to the supernovad(SN1987A) = 51.4 ± 1.2 kpc and a distance modulusm–M(SN1987A) = 18.55 ± 0.05. Allowing for a displacement of SN 1987A position relative to the LMC center, the distance to the barycenter of the Large Magellanic Cloud is also estimated to bed(LMC) = 52.0±1.3 kpc, which corresponds to a distance modulus ofm–M(LMC) = 18.58±0.05.

International determination of the total motion of the pole

1961 ◽  
Vol 13 ◽  
pp. 29-41
Author(s):  
Wm. Markowitz
Keyword(s):  
Secular Motion ◽  
The Future

A symposium on the future of the International Latitude Service (I. L. S.) is to be held in Helsinki in July 1960. My report for the symposium consists of two parts. Part I, denoded (Mk I) was published [1] earlier in 1960 under the title “Latitude and Longitude, and the Secular Motion of the Pole”. Part II is the present paper, denoded (Mk II).

Time and Latitude in South Africa

1972 ◽  
Vol 1 ◽  
pp. 27-38
Author(s):  
J. Hers
Keyword(s):  
South Africa ◽  
Cape Town ◽  
Astronomical Observations ◽  
Royal Observatory ◽  
The Republic ◽  
Astronomical Determination ◽  
Limited Accuracy ◽  
Better Than

In South Africa the modern outlook towards time may be said to have started in 1948. Both the two major observatories, The Royal Observatory in Cape Town and the Union Observatory (now known as the Republic Observatory) in Johannesburg had, of course, been involved in the astronomical determination of time almost from their inception, and the Johannesburg Observatory has been responsible for the official time of South Africa since 1908. However the pendulum clocks then in use could not be relied on to provide an accuracy better than about 1/10 second, which was of the same order as that of the astronomical observations. It is doubtful if much use was made of even this limited accuracy outside the two observatories, and although there may – occasionally have been a demand for more accurate time, it was certainly not voiced.

Large-scale Motion of Solar Filaments

2000 ◽  
Vol 179 ◽  
pp. 205-208
Author(s):  
Pavel Ambrož ◽  
Alfred Schroll
Keyword(s):  
Magnetic Flux ◽  
Proper Motion ◽  
Time Scale ◽  
Large Scale ◽  
Accuracy Of Measurements ◽  
Solar Filaments ◽  
General Movement ◽  
Scale Motion ◽  
Velocity Scatter

AbstractPrecise measurements of heliographic position of solar filaments were used for determination of the proper motion of solar filaments on the time-scale of days. The filaments have a tendency to make a shaking or waving of the external structure and to make a general movement of whole filament body, coinciding with the transport of the magnetic flux in the photosphere. The velocity scatter of individual measured points is about one order higher than the accuracy of measurements.

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