Biological Heart Valves. Biological Heart Valves are made of tissues and valves derived from animals or human donors. Their biggest advantage is that they do not cause blood clotting on their surface and truly replicate the form and function of the normal human valve.
The biggest difference between cured and uncured is the fact that the uncured uses natural curing agents, such as celery powder, which transforms into nitrite when it is processed. Thus, uncured products have labels with: âNo Nitrates or Nitrites added except those naturally in celery powder or juiceâ.
The difference between an unsecured and a secured promissory note is that a secured note is guaranteed by a certain asset, such as a home or vehicle, whereas an unsecured note does not have any collateral associated with it.Nearly all different types of loans will have a promissory note attached.n unsecured promissory note indicates a borrower's intention to repay a loan to the lender as detailed in the promissory note itself.