scholarly journals Flare Stars in Evolved Clusters

1980 ◽  
Vol 85 ◽  
pp. 249-250
Author(s):  
E. S. Parsamian
Keyword(s):  
Usual Method ◽  
Flare Star ◽  
New Method ◽  
Method Of Determination ◽  
Flare Stars ◽  
Young Clusters

A new method of determination of the ages of aggregates based on flare star observations is proposed. The method is specially useful in the case of young clusters and associations, for which the usual method involving their H-R diagrams encounters difficulties. The method can be used also for particular flare stars.

New method of determination of limit plastic load in intersecting cylindrical shells

2012 ◽  
Vol 48 (1-2) ◽  
pp. 15-21
Author(s):  
V. N. Skopinskii ◽  
N. A. Berkov ◽  
A. D. Emelyanova
Keyword(s):  
Cylindrical Shells ◽  
New Method ◽  
Method Of Determination

A New Method of Determination of the Coefficients of Emission in Nucleation Theory

2005 ◽  
pp. 39-73 ◽  
Author(s):  
Jürn W. P. Schmelzer ◽  
Vitali V. Slezov ◽  
Alexander S. Abyzov
Keyword(s):  
New Method ◽  
Nucleation Theory ◽  
Method Of Determination

New Method for Determination of Aminolaevulinate Dehydratase Activity of Human Erythrocytes as an Index of Lead Exposure

1974 ◽  
Vol 20 (10) ◽  
pp. 1287-1291 ◽  
Author(s):  
Katsumaro Tomokuni
Keyword(s):  
Enzyme Activity ◽  
Ion Exchange ◽  
Present Method ◽  
Aminolevulinic Acid ◽  
Usual Method ◽  
Human Erythrocytes ◽  
New Method ◽  
Ion Exchange Column ◽  
Dehydratase Activity

Abstract I describe a new method for measurement of aminolaevulinate dehydratase (EC 4.2.1.24) activity of human erythrocytes. In this method, the amount of substrate δ-aminolevulinic acid consumed (instead of the amount of porphobilinogen formed) is determined colorimetrically. In the incubation mixture, the δ-aminolevulinic acidpyrrole produced by the condensation of δ-aminolevulinic acid with ethyl acetoacetate is separated from porphobilinogen by extraction with ethyl acetate, without resorting to ion-exchange column chromatography. The pyrrole-containing extract is treated with a modified Ehrlich's reagent. Activity of the enzyme is expressed as micromoles of δ-aminolevulinic acid consumed per minute per liter of erythrocytes. Enzyme activity is more accurately estimated by the present method than by the usual method in which porphobilinogen is measured.

Study on Flotation Separation and Determination of Mercury (II) by Sodium Bromide-Ammonium Thiocyanate-Octadecyl Trimethyl Ammonium Bromide System

2012 ◽  
Vol 554-556 ◽  
pp. 1957-1961
Author(s):  
Chang Qing Tu ◽  
Xin Rong Wen
Keyword(s):  
Metal Ions ◽  
Ammonium Thiocyanate ◽  
Sodium Bromide ◽  
New Method ◽  
Ammonium Bromide ◽  
Method Of Determination ◽  
Quantitative Separation ◽  
Solid Phases ◽  
Association Complex

The flotation separation and determination behaviours of mercury (Ⅱ) by sodium bromide -ammonium thiocyanide-octadecyl trimethyl ammonium bromide system were studied. The effects of different parameters,such as the dosages of NH4SCN and octadecyl trimethyl ammonium bromide (OTMAB),various salts and acidity etc. on the flotation yield of Hg2+have been investigated to select the experimental conditions.The results showed that in the presence of 1.0g NaBr and when the dosage of 0.1 mol/L NH4SCN was 0.50 mL and 0.01 mol/L OTMAB solution was 1.00 mL respectively, the formed water-insoluble ternary association complex of (OTMAB)2[Hg(SCN)4] floated above water phase and liquid-solid phases were formed with clear interface. In this condition, Cd2+,Mn2+,Ni2+,Co2+,Fe2+and Pb2+could not be floated and Hg2+could be floated quantitatively at pH2.0.Therefore, the quantitative separation of Hg2+from the above metal ions could be achieved. A new method of determination of trace mercury by flotation separation was established.The proposed method has been successfully applied to the determination of Hg2+in the sample of synthetic water and the flotation yield was 94.2%~97.9%.

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