scholarly journals Practical Guidelines for Collection, Manipulation and Inactivation of SARS‐CoV‐2 and COVID‐19 Clinical Specimens

2020 ◽  
Vol 93 (1) ◽  
Author(s):  
William Bain ◽  
Janet S. Lee ◽  
Alan M. Watson ◽  
Molly S. Stitt‐Fischer
Author(s):  
Blayne Fritz ◽  
Stanley J. Naides ◽  
Kenneth Moore

The pseudoreplica method of staining viral particles for visualization by transmission electron microscopy is a very popular technique. The ability to concentrate clinical specimens while semi-embedding viral particles makes it especially well suited for morphologic and diagnostic virology. Immunolabelling viral particles with colloidal gold is a technique frequently employed by both research and diagnostic virologists. We have characterized a procedure which provides the advantage of both by modifying and combining pseudoreplica staining and immunogold labelling.Modification of specimen retrieval and delay of staining allows us to utilize pseudoreplica processed specimens within our standard immunogold labelling protocol. In brief, we absorbed samples onto 2% agarose, added.25% Formvar and wicked dry. We then floated the Formvar-virus film onto double distilled water, added grids and retrieved with parafilm. The Formvar-virus specimens were then treated as thin tissue sections within our standard two stage immunolabelling protocol. Following completion of immunogold labelling; each grid was negatively stained with phosphotungstic acid or uranyl acetate contrast stains.


2012 ◽  
Vol 3 (3) ◽  
pp. 141-144
Author(s):  
Swati Chaudhary ◽  
◽  
Swastika Aggarwal ◽  
Pawan Kumar ◽  
SK Aggarwal SK Aggarwal ◽  
...  

2020 ◽  
Vol 11 (2) ◽  
pp. 347-352
Author(s):  
Atanaska Peneva ◽  

The report presents the author’s experience in integrating modern ICT technologies in the process of teaching and learning in school. The emphasis is on the use of mobile devices and the integration of cloud technologies in schools. As an ICT teacher, the author provides some practical guidelines on how to apply innovation. The generation of 7 screens does not know a world without digital technologies and mobile communications. The discrepancy between the expectations of the digital generation and the reality in our schools is in terms of the information and communication technologies (ICT) used in them and the didactic models. Adolescents, when they find themselves in an environment that does not meet their expectations, are demotivated and redirect their attention to other objects and goals and stop being active in class. The use of the so-called. „Cloud“ technologies will significantly increase the interest and retention of students. The modern approach to building information systems is focused on developing solutions in which the collection, input and output of information is carried out through WEB-based applications or platforms.


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