mechanical


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me·chan·i·cal

(mĕ-kan'i-kăl),
1. Performed by means of some apparatus, not manually.
2. Explaining phenomena in terms of mechanics.
3. Automatic.
[G. mechanikos, relating to a machine, fr. mēchanē, a contrivance, machine]

mechanical

adjective Referring to or performed by a machine.

me·chan·i·cal

(mĕ-kan'i-kăl)
1. Performed by means of some apparatus, not manually.
2. Explaining phenomena in terms of mechanics.
3. Automatic.
[G. mēchanikos, relating to a machine, fr. mēchanē, a contrivance, machine]

Patient discussion about mechanical

Q. How does an allergic response occur? I don’t understand the exact mechanism of allergies. Can someone explain this?

A. In the early stages of allergy, a type I hypersensitivity reaction against an allergen, encountered for the first time, causes a response in a type of immune cell called a TH2 lymphocyte, that interact with other lymphocytes called B cells, whose role is production of antibodies. The secreted IgE antibody circulates in the blood and binds to an IgE-specific receptor (a kind of Fc receptor called FceRI) on the surface of other kinds of immune cells called mast cells and basophils, which are both involved in the acute inflammatory response. The IgE-coated cells, at this stage are sensitized to the allergen. If later exposure to the same allergen occurs, the allergen can bind to the IgE molecules held on the surface of the mast cells or basophils and cause a full reaction.

More discussions about mechanical
References in periodicals archive ?
Sammut, PE has been with AKF for over seven years and is a licensed mechanical engineer in the New York office.
In some cases it would be less expensive to replace the chemical-dependent equipment with mechanical, and have a one-step rather than two-step system.
Chilling may or may not improve the soundness of a casting when measured by standard non-destructive testing techniques like radiography or dye penetrant inspection, but the influence on microstructure and mechanical properties can be significant.
The second difference between the two types of seals is that mechanical seals can be designed to be under-balanced, where the balance ratio is below 1.
This ceiling allowed us to test a number of basic electronic scales as well as numerous mechanical scales.
First, the taxpayer argued that the proper test was a mechanical 80% test and that, under that test, V had 80% of the board's voting power.
He and his co-workers have fabricated minuscule mechanical memory arrays, logic elements and oscillators--the kinds of components that make up today's microprocessors--onto a silicon chip.
CarboMedics subsequently designed and manufactured 17 different prosthetic heart valves for 16 multi-national companies, therefore setting the industry standard for mechanical heart-valve replacement.
Before turning to making this marriage permanent, consider a few actual mill experiences that illustrate how these chemical and mechanical components can work for or against each other:
Enter National Mechanical Services LLC, a 24/7 full service mechanical contracting firm.
of Metallurgy at College de Toris-Riveres, Quebec, found mechanical property discrepancies between aluminum castings and their tensile test counterparts.
Technical service: Outdoor (real time) weathering in 23 exposure sites around the world; outdoor accelerated weathering (EMMAQUA, EMMAQUA+); instrumental color, gloss, visual evaluation, physical, optical and mechanical analysis