• Public Gallery  • Help  
• Join Now!  • Log In  • Feature Tour
 Bob Metcalf | Home  
1 - 8 of 8 Total.
Solar water pasteurization
1. Solar water pasteurization  (May, 2015)
The default recommendation to treat contaminated water is to boil it. However, as microbiologists know from milk pasteurization (160°F, 71°C, for only 15 seconds)boiling is heat far in excess of what is needed. Water will be pasteurized when heated to 149°F (65°C). A reusable, wax-based Water Pasteurization Indicator (WAPI) can verify that water has been pasteurized. Microbiology tests before and after heating verify the disease microbes have been killed.
10 Visits
21 Images
Shared Album
Water testing & Pasteurization in Africa
2. Water testing & Pasteurization in Africa 
A guide to water testing in developing countries using a Portable Microbiology Laboratory, and how to pasteurize contaminated water using sunshine and a simple solar cooker.
4862 Visits
131 Images
Shared Album
3. watermicrohistory  (1987-2003)
History of water testing in developing countries using the Colilert 10 ml presence/absence test and the E. coli Count Petrifilm as test items of a Portable Microbiology Laboratory.
762 Visits
110 Images
Shared Album
4. SODISheatchlorine  (July 18, 2011)
Water sources in Lower Nyakach, Kenya, are tested and treated by solar disinfection (SODIS), heat, and chlorine. Will these procedures make the water safe to drink?
353 Visits
80 Images
Shared Album
Delft, Holland, 30 July, 2012
5. Delft, Holland, 30 July, 2012  (30 July, 2012)
A stopover in Delft between Kenya and California, with a visit to the tomb of Antonie van Leeuwenhoek, citizen of Delft, who made a microscope in the 1670s that was powerful enough to discover the microbial world for all of humanity. He was the first person to see bacteria, yeast, algae, red blood cells, protozoa.
512 Visits
89 Images
Shared Album
Bio 139 Lab Practical #1
6. Bio 139 Lab Practical #1 
Photos from lab exercises covered on the first lab practical exam
3062 Visits
83 Images
Shared Album
Bio 139 Lab Practical 2
7. Bio 139 Lab Practical 2 
Photos from lab exercises covered on the second lab practical exam
11694 Visits
85 Images
Shared Album
WAPI waxes
8. WAPI waxes  (March 6, 2011)
Testing melting temperature of WAPI waxes
366 Visits
19 Images
Shared Album

Share images with friends & family, Send Invitation or Share URL: