On Quantitative Estimation of Laser Melting Phenomenon with Numerical Visualization Technique

Dicalcium silicate (Ca2SiO4) is a major component of Portland cement. It has also been investigated as a potential transformation toughener alternative to zirconia. It has five polymorphs: α, α'H, α'L, β and γ. Of interest is the β-to-γ transformation on cooling at about 490°C. This transformation, accompanied by a 12% volume increase and a 4.6° unit cell shape change, is analogous to the tetragonal-to-monoclinic transformation in zirconia. Due to the processing methods used, previous studies into the particle size effect were limited by a wide range of particle size distribution. In an attempt to obtain a more uniform size, a fast quench rate involving a laser-melting/roller-quenching technique was investigated.The laser-melting/roller-quenching experiment used precompacted bars of stoichiometric γ-Ca2SiO4 powder, which were synthesized from AR grade CaCO3 and SiO2xH2O. The raw materials were mixed by conventional ceramic processing techniques, and sintered at 1450°C. The dusted γ-Ca2SiO4 powder was uniaxially pressed into 0.4 cm x 0.4 cm x 4 cm bars under 34 MPa and cold isostatically pressed under 172 MPa. The γ-Ca2SiO4 bars were melted by a 10 KW-CO2 laser.

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Plasma Fibrin Stabilising Factor (F. S. F.) Activity in Normal Subjects and Patients with Chronic Liver Disease

Thrombosis and Haemostasis ◽

10.1055/s-0038-1653516 ◽

1969 ◽

Vol 21 (01) ◽

pp. 134-143 ◽

Cited By ~ 9

Author(s):

W. D Walls ◽

M. S Losowsky

Keyword(s):

Liver Disease ◽

Chronic Liver Disease ◽

Clinical Improvement ◽

Quantitative Estimation ◽

Kinetic Method ◽

Normal Subjects ◽

Chronic Liver ◽

Clinical Severity ◽

Plasma Fibrinogen ◽

Normal Range

SummaryA kinetic method for the quantitative estimation of plasma F.S.F. activity is described and discussed.This method was applied to normal subjects and to patients with chronic liver disease. The plasma F.S.F. activity was uninfluenced by either sex or age, and the normal range has been defined.A significant decrease in plasma F.S.F. activity was observed in patients with chronic liver disease. Subnormal levels of activity were found in 25% of such patients but were unrelated to episodes of abnormal haemorrhage. Plasma F.S.F. activity tended to be lower in patients with disease of greater clinical severity. In 2 patients showing clinical improvement there was an increase in plasma F. S. F. activity.It was confirmed that plasma fibrinogen levels increase with age.

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Social development of modern Russia: trends, risks, prospects

Voprosy Ekonomiki ◽

10.32609/0042-8736-2018-10-76-89 ◽

2018 ◽

pp. 76-89

Author(s):

E. M. Avraamova ◽

V. N. Titov

Keyword(s):

Middle Class ◽

Social Development ◽

Social Structure ◽

Structure Formation ◽

Resource Availability ◽

Social Dynamics ◽

Quantitative Estimation ◽

Resource Potential ◽

Institutional Conditions ◽

Resource Characteristics

The analysis of present-time directions in the study of social development has allowed to identify the resource approach as the most productive one which enables to assess social dynamics through the range of resource characteristics of different population groups and abilities of the relevant groups to apply development resources in the current economic and institutional conditions. Basing on the sociological survey conducted by ISAP RANEPA, the quantitative estimation of material and social recourses of the population has been made; integral values of the resource potential have been calculated as well. The issues of social structure formation are analyzed through the aspect of resource availability; the barriers of Russian middle-class enlargement are defined.

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QUANTITATIVE ESTIMATION OF URINARY PREGNANETRIOL, PREGNANETRIOLONE, TETRAHYDRO S AND Δ5-PREGNENETRIOL IN THE INVESTIGATION OF ADRENOCORTICAL FUNCTION

Acta Endocrinologica ◽

10.1530/acta.0.0600657 ◽

1969 ◽

Vol 60 (4) ◽

pp. 657-668 ◽

Cited By ~ 2

Author(s):

Frances J. Thomas ◽

A. W. Steinbeck

Keyword(s):

Congenital Adrenal Hyperplasia ◽

Cushing’S Syndrome ◽

Adrenocortical Carcinoma ◽

Quantitative Estimation ◽

Cushing's Syndrome ◽

Adrenocortical Function ◽

Adrenal Hyperplasia ◽

Ectopic Acth ◽

Modified Method ◽

Idiopathic Hirsutism

ABSTRACT A modified method for the estimation of urinary pregnanetriol, pregnanetriol, pregnanetriolone, Δ5-pregnenetriol and tetrahydro S was investigated. The steroids, separated by chromatography, were measured quantitatively, tetrahydro S by reaction with blue tetrazolium and the other three as acetaldehydogenic substances. The excretion of these steroids was studied in suspected instances of adrenal and/or ovarian disease. Urinary pregnanetriol and tetrahydro S levels were normal in Cushing's syndrome, secondary adrenocortical carcinoma, the Stein-Leventhal syndrome, idiopathic hirsutism and hypertension. Tetrahydro S was doubtfully elevated in an instance of ectopic ACTH Cushing's syndrome. Pregnanetriol excretion was elevated in untreated cases of congenital adrenal hyperplasia and after treatment in some. Pregnanetriolone was found in all patients with congenital adrenal hyperplasia, including those receiving cortisone. Pregnanetriolone was also detected in Cushing's syndrome, secondary adrenocortical carcinoma, the Stein-Leventhal syndrome, ectopic ACTH Cushing's syndrome and suspected congenital adrenal hyperplasia. Δ5-pregnenetriol was present as a glucuronide in the Stein-Leventhal syndrome and idiopathic hirsutism. The diagnostic implications of these results are discussed.

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