scholarly journals Beryllium Sulfate

2020 ◽  
Author(s):  
Keyword(s):  
1994 ◽  
Vol 39 (4) ◽  
pp. 726-728 ◽  
Author(s):  
Victor M. Lobo ◽  
Ana C. Ribeiro ◽  
Luis M. Verissimo

1994 ◽  
Vol 72 (11) ◽  
pp. 1377-1379 ◽  
Author(s):  
Setsuro Ebashi ◽  
Hideto Kuwayama

The 155-kDa component of bovine stomach, which exhibits a strong actomyosin (AM) activating activity and a relatively weak myosin light chain kinase (MLCK) activity, has a strong affinity for the actin filament and the actin-binding site is confined to an 80 amino acid residue on its N-terminal side. This affinity may play a crucial role in AM activation. Some reagents preferentially abolish either the AM-activating effect or MLCK activity. In conclusion, MLCK of the 155-kDa component does not play a fundamental role in activating the AM system as far as the in vitro system is concerned. The possible mechanism of AM activation by the component is discussed.Key words: myosin light chain kinase, phosphorylation of myosin light chain, leiotonin, wortmannin, beryllium sulfate.


1996 ◽  
Vol 25 (3) ◽  
pp. 231-242 ◽  
Author(s):  
Ling Hao ◽  
Ruanhui Lu ◽  
Derek G. Leaist

2001 ◽  
Vol 32 (1) ◽  
pp. 28-35 ◽  
Author(s):  
Pius Joseph ◽  
Timothy Muchnok ◽  
Tong-man Ong

2020 ◽  
Vol 86 (7) ◽  
pp. 7-11
Author(s):  
A. A. Dyachenko ◽  
N. M. Blashenkov ◽  
N. S. Samsonova ◽  
L. N. Gall ◽  
A. A. Semyonov ◽  
...  

The significance of the problem of determining the concentration of beryllium in solutions is substantiated. A method of APESI mass-spectrometry (atmospheric pressure electrospray ionization with in-source atomization) is compared with a number of other common procedures used for solving the aforementioned problem and a number of advantages of APESI mass spectrometry are highlighted. The possibility of measuring the beryllium concentration in various chemical forms using APESI mass-spectrometry is studied. We used sulfate, nitric acid and chloride salts of beryllium. The measurements were carried out on a specialized small-sized mass spectrometer MI-20 «LowMass» developed at MS-Bio Company, Russia. A schematic diagram of the device designed to determine the concentration of beryllium in solutions is presented and described. A technique of solution preparation and measurement procedure are proposed. Presented ass spectra obtained on the samples containing beryllium and lithium isotopes were used as an internal standard. It is shown that beryllium can be detected from the salts of chloride and nitric acids with close relative sensitivity coefficients. The obtained detection limit for beryllium chloride in those measurements was ~1 – 2 × 10–8 M. At the same time, the analytical signal of beryllium cannot be detected during electrospray of the solution of beryllium sulfate under any experimental conditions. It has been suggested that this effect may be attributed to the features of dissolution of beryllium sulfate, in particular, to hydrolysis and formation of complex compounds with sulfate, including complex polymer and colloidal forms.


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