| 00:00:00 | Welcome |
| 00:01:21 | Abstract – Hi Ho Silver, away… |
| 00:02:44 | Agenda |
| 00:03:51 | O2Q: we’ll be hearing about silver nitrate in this talk but… |
| 00:04:20 | Invisible ink |
| 00:05:37 | George Vaux Bacon |
| 00:06:28 | Argyrol See: http://www.barnesfoundation.org/about/history/albert |
| 00:06:57 | Ionized Super Silver (with ozone!) |
| 00:07:10 | Argyrol |
| 00:07:20 | Hegonon – Schering – silver protein complex |
| 00:07:30 | George Vaux Bacon |
| 00:08:04 | George Vaux Bacon |
| 00:08:17 | GVB looking happier than his mugshot |
| 00:08:26 | George Vaux Bacon |
| 00:08:46 | Macrakis |
| 00:09:11 | CIA Declassifies Oldest Documents in U.S. Government Collection |
| 00:09:34 | CIA – “Secret writing document six” |
| 00:09:57 | Colloidal silver |
| 00:10:21 | Preparation of ‘silver’ colloids |
| 00:13:14 | John Turkevich – colloidal gold mainly |
| 00:13:37 | Turkevich – Gold Bulletin (1985 articles) |
| 00:13:55 | PhD Thesis: Victor Elias Torres Heredia Universidad Politécnica de Catalunya November 2011 |
| 00:14:33 | Stabilization |
| 00:14:59 | Shape Control |
| 00:15:11 | Nanocubes |
| 00:15:24 | Tollens' reagent preparationhttps://en.wikipedia.org/wiki/Tollens%27_reagent |
| 00:15:54 | http://www.rsc.org/Education/EiC/issues/2007Jan/ExhibitionChemistry.asp |
| 00:16:28 | Aldehyde test – for the organic chemists only |
| 00:16:46 | Care! Silver nitride is formed on storage… |
| 00:17:16 | Form of silver produced |
| 00:19:10 | Merck's Report |
| 00:19:41 | Surface Analysis – AFR: Ph.D thesis (alloy catalysts)Thanks to Sherylene Wass, JMRC, Sonning Common (1978)Nominally 5% Metal(s)/SiO2 made by hydrazine reduction. This shows the ESCA peak for Ag 3d for a Pd80Ag20 catalyst |
| 00:20:41 | Surface: 5 – 10 atomic layers – this is the Ag/SiO2Mainly carbon and oxygen…. |
| 00:22:02 | Silver is in an oxidized state…Variability is high for such measurements |
| 00:22:51 | The silver is in the oxide state |
| 00:24:12 | Adapted from: www.catalysiscourse.comProfessor J.W. Niemantsverdriet, TU Delft |
| 00:24:46 | More XPS (Applied Surface Science) – now 2012 |
| 00:25:16 | And more Auger…Tufts |
| 00:25:38 | SEM Image of typical catalyst – AFR PhD thesisAverage particle size ~ 10 nm by number |
| 00:26:01 | Silver and photography |
| 00:26:18 | Staining |
| 00:26:23 | Skin on hand stained by silver nitrate |
| 00:26:29 | Medical uses of silver |
| 00:26:50 | “Papa Smurf” “Once in a blue moon”http://abcnews.go.com/Health/internet-sensation-papa-smurf-dies-blue-people-live/story?id=20368758 |
| 00:27:10 | Science 1933 Argyria |
| 00:27:25 | Not to be confused with the Blue Fugates |
| 00:27:44 | Stan Jones (politician) |
| 00:28:12 | Stan Jones |
| 00:28:25 | Disinfection |
| 00:28:56 | https://en.wikipedia.org/wiki/Medical_uses_of_silver |
| 00:29:26 | https://en.wikipedia.org/wiki/Medical_uses_of_silver |
| 00:29:56 | International report |
| 00:30:07 | International report |
| 00:30:24 | FDA – “Final Rule” 1999http://www.fda.gov/ohrms/dockets/98fr/081799a.txthttp://www.gpo.gov/fdsys/pkg/FR-1999-08-17/pdf/99-21253.pdf |
| 00:30:56 | FDA & 483’s |
| 00:31:18 | 483 exampleshttp://www.fda.gov/ICECI/EnforcementActions/WarningLetters/2014/ucm416051.htm |
| 00:31:50 | Debunking sites! |
| 00:32:30 | Quackwatch (continued) |
| 00:33:04 | And the backlash from manufacturers! |
| 00:33:11 | http://www.riskscience.umich.edu/nano-silver-ebola-show-us-data-remove-claims-fda/ |
| 00:33:29 | Silver alloys |
| 00:33:59 | Platinum Metals Review |
| 00:34:30 | Summary |
| 00:35:08 | Thank You! |
| 00:35:08 | Thank you for your attentionAny questions? |
| 00:35:56 | Contact Information |
In the early history of cryptography and ciphers then invisible inks using silver salts and other chemicals were used. Silver colloids were regularly used and abused in this area. Silver colloids are now finding application (and legislation) as batericides. We'll note that silver colloids are not actually silver (on the surface) and owe their bactericidal properties to dissolution of the Ag+ ion from silver oxide on their surface. Ag is also used in Pd-Ag alloys for catalyst and hydrogen purification uses - we'll explore these too.