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(păs″ĭ-vā′shĭn) [″]
The stabilization and protection of a surface from outside influences, e.g., the treatment of an atherosclerotic plaque to keep it from rupturing or of a metal to keep it from corroding.
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Patient discussion about passivation

Q. what is a passive smoking? and is it dangerous as an active?

A. Passive smoking is the exposure to cigarettes smoke emitted from cigarettes smoke by other person. It's dangerous and may increase the risk to several diseases similar to active smoking (one's exposure to smoke emitted from the cigarettes he or she is smoking) although the risk is of lower magnitude. Example for passive smoking is children of smokers etc.

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Q. what is it a passive smoking? and is it bad as as the active smoking? can i get cancer from it?

A. Passive smoking is the involuntary exposure of nonsmokers to tobacco smoke from the smoking of others. It is considered dangerous, and cause increased risk of cancer, although to a lesser degree than active smoking.

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Q. Can I get lung cancer from passive smoking? All my friends smoke, can I get cancer by hanging out with them?

A. Yes, you can develop cancer by passive smoking. From what I've heard, non-smokers exposed to second-hand smoke at home or work, increase their risk of developing lung cancer by 20 percent to 30 percent.

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References in periodicals archive ?
(3) To investigate the effect of the deformation structure and the annealing temperature on the stability of the passivation layer.
Comparing with silicon nanobowl arrays with Si[O.sub.2] passivation layer and hemisphere Ag back reflector in Figure 4(b), the excitation of surface plasmon resonances in metal nanobowl shell can increase the energy transmitted into the silicon layer.
However here a higher specification of stainless steel may be required to provide superior levels of corrosion resistance or a finer finish may be necessary to increase the integrity of the passivation layer to protect the stainless steel from attack in this potentially harsher environment such as saltwater from the sea.
Wu, "Crystalline ZrTi[O.sub.4.sup.-]gated Ge metal-oxide-semiconductor devices with amorphous [Yb.sub.2][O.sub.3] as a passivation layer," IEEE Transactions on Nanotechnology, vol.
The nature of the passivation layer and the conditions of its formation have been well defined.
However, the applied passivation layer reduced the depth dimension of the wafers.
"You need to bring them very close together without actually touching." The solution is to cover each quantum dot in a passivation layer, a coating of organic molecules that keeps the dots separate.
Chemically bonded phosphate ceramics (CBPC) can create a passivation layer that stops corrosion while being mechanically protected by a tough ceramic outer layer.
The challenge with copper is that it leaches into the silicon, so a passivation layer or a diffusion barrier is required, and nickel has to be plated prior to copper plating.
While traditional corrosion protection has relied mostly on short-lived physically-bonded coverings of substrate surfaces, a new category of chemically bonded phosphate ceramics (CBPCs) can create a long-lived passivation layer that stops corrosion.