Why blood clots when collected in a clean glass tube, due to negatively charged glass?
“Glass surfaces are negatively charged, and when blood is collected in a clean glass test tube, it clots. Explain this observation.”
About Me
ALES LOMBERGAR is one of the few artisans in Europe who still practice the ancient art of glass acid etching which flourished in the late 19th century. Decorations are applied with resin resists by hand and then exposed to acid baths, with no machinery used. More information here.Recent in portfolio
- Slovenian President’s Bureau
- Presidential Gift
- Presidential Gift for Putin
- Versace Windows
- Casino Kiev
- Mediterranean Restaurant
- Cottage Floetotto
- Viking Line
- St. Nicholaus Cathedral
- Hotel Habakuk
- Crystal Symphony
- Slovenian Philharmonics
- Casino Baden
- Apartment Windows
- Map Of Arabia
- Arabesque
Press clippings
-
-
Danica Simšič in Knez Albert
- Povezanost vsebine in oblike
- Slovenci očarali Arabce
- Aleš Lombergar
- Vrata v čudežno deželo
- Umetnik v skafandru
- O razkošju in slabostih Stare Ljubljane
- Varstvo spomenikov
- V steklo jedkana podoba je svojevrstna igra absurda
- Lepota jedkanega stekla
- Muhasta igra kristalov
- Jedkalec stekla
- Neobičajen pogled skozi okrašeno okno
- Tito in Lombijev pustni žur
- Eksotično mojstrstvo, ki krasi ambient
- Šipe z ujedkanim okrasjem
- Mojster v jedkanju stekla in še čem
- Secesijska stekla so rešena
- Aleš Lombergar – Evidenca
- Slovenian Philharmonic (Slovenska filharmonija)
- Nekoč bom spet Mariborčan
- Slowenien Magazin: Aleš Lombergar
- Ekstra Magazin: Aleš Lombergar
- Dosežki: Aleš Lombergar
- Mojstrovine Slovenije: Aleš Lombergar
- Aleš Lombergar – Večerni gost (Sandi Čolnik Intervju)
- Gulf Interiors, Dubai
- Shownews, Dubai
- Ales Lombergar in Delo magazine
- Lombergar’s Doors Turn A Few Heads
- Nekaj za dušo
- Etched Glass by Ales Lombergar
- Kadar te začara knjiga
- Prezrta steklena dediščina
StarbucksCoffee
on February 8th, 2012
it doesnt matter if it’s glass or plastic. Once exposed to air (oxygen) the blood will clot unless it’s been treated with an anticoagulant like EDTA, heparin, or sodium citrate.
That’s why these test tubes have anti coagulant in them. The tubes themselves can be glass or plastic, it doesn’t matter.
No anti-coagulant = clot
anti-coagulant = no clot.