Accelerated hydrothermal ageing of Pd/Al2O3 for catalytic combustion of ventilation air methane

2015 ◽  
Vol 5 (8) ◽  
pp. 4008-4016 ◽  
Author(s):  
Adi Setiawan ◽  
Jarrod Friggieri ◽  
Glenn Bryant ◽  
Eric M. Kennedy ◽  
Bogdan Z. Dlugogorski ◽  
...  
Keyword(s):  
Catalytic Combustion ◽  
Catalyst Deactivation ◽  
Stability Tests ◽  
Term Stability ◽  
Methane Gas ◽  
Long Term Stability

In this report, the characteristics of Pd/Al2O3 catalyst after long-term stability tests in catalytic combustion of simulated ventilation air methane gas were investigated with the objective of understanding catalyst deactivation phenomena.

scholarly journals Stability Assessment of Four Chimeric Proteins for Human Chagas Disease Immunodiagnosis

Biosensors ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 289
Author(s):  
Paola Alejandra Fiorani Celedon ◽  
Leonardo Maia Leony ◽  
Ueriton Dias Oliveira ◽  
Natália Erdens Maron Freitas ◽  
Ângelo Antônio Oliveira Silva ◽  
...  
Keyword(s):  
Chagas Disease ◽  
Structural Integrity ◽  
Structural Characteristics ◽  
Control Group ◽  
Stability Tests ◽  
Adverse Conditions ◽  
Term Stability ◽  
Long Term Stability

The performance of an immunoassay relies on antigen-antibody interaction; hence, antigen chemical stability and structural integrity are paramount for an efficient assay. We conducted a functional, thermostability and long-term stability analysis of different chimeric antigens (IBMP), in order to assess effects of adverse conditions on four antigens employed in ELISA to diagnose Chagas disease. ELISA-based immunoassays have served as a model for biosensors development, as both assess molecular interactions. To evaluate thermostability, samples were heated and cooled to verify heat-induced denaturation reversibility. In relation to storage stability, the antigens were analyzed at 25 °C at different moments. Long-term stability tests were performed using eight sets of microplates sensitized. Antigens were structurally analyzed through circular dichroism (CD), dynamic light scattering, SDS-PAGE, and functionally evaluated by ELISA. Data suggest that IBMP antigens are stable, over adverse conditions and for over a year. Daily analysis revealed minor changes in the molecular structure. Functionally, IBMP-8.2 and IBMP-8.3 antigens showed reactivity towards anti-T. cruzi antibodies, even after 72 h at 25 °C. Long-term stability tests showed that all antigens were comparable to the control group and all antigens demonstrated stability for one year. Data suggest that the antigens maintained their function and structural characteristics even in adverse conditions, making them a sturdy and reliable candidate to be employed in future in vitro diagnostic tests applicable to different models of POC devices, such as modern biosensors in development.

Results of Long-Term Stability Tests Performed for the Eutectics Co–C and Pt–C

2011 ◽  
Vol 32 (7-8) ◽  
pp. 1719-1731 ◽  
Author(s):  
T. Wang ◽  
C. Bai ◽  
W. Dong ◽  
Z. Yuan ◽  
P. Bloembergen ◽  
...  
Keyword(s):  
Stability Tests ◽  
Term Stability ◽  
Long Term Stability
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