Hello guys! I bring good news to you. I am qualified for the National Level of the Romanian Chemistry Olympiad 2010, which will take place this year at Pitești, a nice city, where I've lived for almost half a year in 2004. I am quite happy about my results at the county phase, but I would like to believe this year will show up to be more rewarding than the previous one :D Unfortunately this year the Olympiad has no website, which is pretty annoying because we can't get any kind of updates about it. Although there is no way of directly receiving information about the Olympiad, my teacher has sent me the syllabus, which includes hydrocarbons (alkanes, alkenes, alkynes, polyenes and aromatic hydrocarbons), alcohols and just might include phenols, but that's not for sure.
And now, a little thing I've noticed on a Colgate® toothpaste tube:
On the back of the tube, it said: "contains liquid calcium". Well, chemically speaking, liquid calcium is obtained when you heat it to 842 °C in an environment lacking oxygen, because if oxygen would present self ignition of calcium would happen. So, clearly, this can't be the case admitting the last time I checked, I wasn't brushing my teeth with a molten hot red paste :))
Maybe they wanted to say "a liquid solution of CaF2", but again it has to be a very, very diluted one, judging that the solubility in water 20 °C is roughly 0.0016 g/100 mL. Therefore, even this more scientific formulation is quite improper, though this might not be just a minor mistake, but more like an eye catchy description for customers to buy it. Nevertheless, everything should have a scientific basis, which in this case lacks somehow. Hope I wasn't too harsh :D
at least it bought a smile on my face. great one.
ReplyDeleteHave you seen the Colgate Total toothpaste? It claims 12hr protection from bacteria cause of a special polymer they added which apparently helps the antibacterial agent (triclosan) to form a barrier around your teeth. But checking the ingredients against a regular Colgate brand, the only difference I noticed was the triclosan...is the polymer a part of their triclosan?
ReplyDeleteThanks a lot
Regarding your question about triclosan and the polymer, triclosan is a compound with the formula polychloro phenoxy phenol. It is indeed used as an antibacterial in toothpastes, but I'm afraid that this isn't a polymer as you claim the commercial suggested.
ReplyDeleteThank you for the remark. I can definitelly see your point there,
Andrew
Ah I see. Thanks for replying. I just did another search and the co-polymer is something called 'gantrez'. Not mentioned in the ingredients here though...
ReplyDeleteBluebonnet Liquid Calcium - Blue Bonnet Liquid Calcium Magnesium Citrate Plus Vitamin D3 provides calcium and magnesium with naturally flavored liquid formula. Buy Blue Bonnet Liquid Calcium on bulk discount at Herbs-Wholesale.
ReplyDeleteWell, it may not be liquid calcium per se, but it helped me completely restore the enamel on a front tooth from which I'd scraped a noticeable chunk off after eating vinegary chicken wings... And this spot turned pure black in a matter of days. I'm just pissed they stopped selling it in Canada... Probably because people like me didn't have to rush to the dentist to have mishaps like these "professionally treated" anymore.
ReplyDelete