A search for short-time-scale variations in H-alpha emission in the spectra of four bright Be stars

1980 ◽  
Vol 92 ◽  
pp. 472 ◽  
Author(s):  
R. C. Reynolds ◽  
A. Slettebak
Keyword(s):  
Time Scale ◽  
Short Time Scale ◽  
Be Stars ◽  
Alpha Emission ◽  
Short Time

scholarly journals Is HR 9070 Really Pulsating?

1987 ◽  
Vol 92 ◽  
pp. 78-81
Author(s):  
Sareyan J.P. ◽  
Alvarez M. ◽  
Chauville J. ◽  
Le Contel J.M. ◽  
Michel R. ◽  
...  
Keyword(s):  
Time Resolution ◽  
Time Scale ◽  
Short Time Scale ◽  
Be Stars ◽  
Time Constants ◽  
Systematic Survey ◽  
Short Time

As Be stars and classical β CMa variables both have a distribution peak at B2, one can wonder if there is a connection between these two phenomena. A way to solve this problem could be to carry out a systematic survey of emission on short periodic B variables,over months and years.Another way, chosen by our grouns in Nice, Ensenada and Meudon, is to improve time resolution in photometric and spectrographic observations on the Be stars already known to have short time scale variations. Special attention is paid to longitude cooperation, essential to detect or measure longer time constants.

An Alternative Test Using Algal Cultures for Testing Chemicals for Toxicity

1993 ◽  
Vol 21 (2) ◽  
pp. 196-201
Author(s):  
Søren Achim Nielsen ◽  
Thomas Hougaard
Keyword(s):  
Size Distribution ◽  
Mitotic Activity ◽  
Time Scale ◽  
Test System ◽  
Short Time Scale ◽  
Toxic Substances ◽  
Alternative Test ◽  
Short Time ◽  
Algal Cultures ◽  
Test Cultures

An alternative test is presented, in which algal cultures are used for testing toxic substances. This test system is based on variations in the size distribution of cells in test cultures as a measurement of growth. Thus, inhibition of mitotic activity is used as a measurement for toxic effects. The test can be performed on a short time-scale and is very sensitive to even weak toxic doses.

SHORT-TIME SCALE DEVELOPMENT OF A GYMNODINIUM CATENATUM POPULATION IN THE RIA DE VIGO (NW SPAIN)1

1996 ◽  
Vol 32 (2) ◽  
pp. 212-221 ◽  
Author(s):  
Eglee Gomez Fermin ◽  
Francisco G. Figueiras ◽  
Belen Arbones ◽  
Maria Luisa Villarino
Keyword(s):  
Scale Development ◽  
Time Scale ◽  
Short Time Scale ◽  
Nw Spain ◽  
Ría De Vigo ◽  
Short Time ◽  
Gymnodinium Catenatum
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