trace level
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Author(s):  
Varsha Gautam ◽  
Avshish Kumar ◽  
Ramesh Kumar ◽  
Mushahid Husain ◽  
Vinod Kumar Jain ◽  
...  

Author(s):  
Chandan Mukhopadhyay ◽  
K. Dhamodharan ◽  
Pradeep Kumar Sharma ◽  
V. Rekha ◽  
K. Ananthasivan ◽  
...  

Author(s):  
Yong Tian ◽  
Jiawen Cheng ◽  
Xiaoxuan Han ◽  
Yutong Li ◽  
Ting Yang ◽  
...  

The measurement of ultra-trace level of heavy metals in complex metrics is of great concern and challenge in life and environmental science. Herein, a novel thiol-functionalized covalent organic framework (COF)...


Author(s):  
Donatien Lefebvre ◽  
François Fenaille ◽  
Déborah Merda ◽  
Kevin Blanco-Valle ◽  
Cécile Feraudet-Tarisse ◽  
...  

Metals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1893
Author(s):  
Denitsa Kiradzhiyska ◽  
Gueorgui Vassilev ◽  
Rositsa Mancheva ◽  
Svetlana Yaneva ◽  
Nikolina Milcheva

A typical modification technique of the functional properties of Al–Si based alloys is the addition of some third element in trace level. In the present work, ternary Al–Si–Zr bulk and ribbon alloys have been prepared. The kinetics of high-temperature surface oxidation has been studied by thermogravimetric method. It was found that at the start of the experiment the chemical reaction velocity is rate-controlling while for longer times the (oxygen) diffusion is the rate-controlling process. Activation energy of the two stages of oxidation has been obtained. Additional studies such as thermochemical analysis, optical and electron microscopy, and microhardness tests have been done.


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