Archive | L RSS feed for this section

L NETWORK, ATTENUATOR, FILTER

Half an un

Continue Reading ·

L SECTION

Section or half-section of a filter, having shunt and series arms.

Continue Reading ·

L'HOSPITAL'S RULE

A rule for evaluating certain limits. If f a=0 and ga~0, and if n is the lowest integer for which f,a and g

Continue Reading ·

L+, L0, LR DOSE OF TOXIN

Used in standardizing diptheria toxin and antitoxin. Describes the quantity of toxin which, when mixed with one standard unit of antitoxin, respectively either kills a guinea pig under standardized conditions, or when injected subcutaneously produces no observable reaction, or when inoculated into the skin produces a minimal lesion.

Continue Reading ·

L-BAND

A radar and microwave frequency band, generally accepted as being 1-2 GHz; not frequently referred to because of lack of international conformity in its use.

Continue Reading ·

L-C FILTER

Property of a component inductor in a circuit whereby back emf arises because of rate of change of current. It is 1 henry when 1 volt is generated by rate of change of 1 ampere per second. Often abbreviated to inductance.

Continue Reading ·

L-CAPTURE

Absorption of an electron from the L-shell into the nucleus of an atom, giving rise to X-rays of characteristic wavelength depending on atomic number of the element. See K

Continue Reading ·

L-DISPLAY

A radar display in which the target appears as two horizontal pulses, left and right from a central vertical time base, varying in amplitude according to accuracy of aim.

Continue Reading ·

L-FORMS

Morphological variants developed from large bodies by prolonged exposure to various treatments. Consist of colonies of filterable bodies with a cytoplasmic matrix. Frequently revert to the normal form. If blood or serum is supplied in their nutrient medium, may breed true for some generations.

Continue Reading ·

L-HEAD

A petrol-engine cylinder head carrying the inlet and exhaust valves in a pocket at one side; resembles an inverted L.

Continue Reading ·