HEART BLOCK, the arrhythmia of heart stipulated by violation of realization in the myocardium of a pulse to reduction; inquest of rheumatic disease, a cardiosclerosis, intoxications, etc. Can be temporary and a stationary value, the partial and full.

The BLOCKHOUSE (a nem. Blockhaus), a shore fortification (with walls and cover from a tree, concrete, etc., with a living accommodation for garrison) for management circular ruzhejno-machine-gun, and sometimes and ammunition fire. In 1-st and 2-nd world wars defences of cities were applied basically to cover of bridges, mountain passes, etc.

The BLOCK MAP, perspective of any plot of a surface together with a geological record of earth crust. It is used primarily at study of interrelations of a relief and a geologic structure.

The BLOCKING OSCILLATOR, the relaxation oscillator with the transformer converse connection, producing short-lived (ok. 1 mcs) the electric pulses recurring through rather major intervals. Are applied in devices of a pulse technique.

LOCKING of ACCOUNTS, forfeiting of masters of bank accounts of the right loosely to dispose of a means. Implements public authorities at introduction of economic sanctions to other country; at establishment of currency or credit limitations; under the solution of courts of justice under the claim to an account holder.

BLOCKED OUT HOUSES, maloetazhnye the residential buildings consisting of inhabited cells located in a number, each of which has a do-it-yourself orifice and a separate garden plot.

BLOCKAGE, change of a mode of behavior (down to a shut-down) machines, the device or the device, called by sudden violation of normal conditions of their operation; prevents error actions at operation control of technical object. Implements automatically or by hand-carry.

BLOMBERG (Blomberg) the Werner a background (1878-1946), german general - field marshal (1936). With 1933 minister rejhsvera, with 1935 military minister and the commander-in-chief armed forces. With 1938 in demission.

BLOMBERGEN, Blumbergen (Bloembergen) Nicolas (r. 1920), American physics. Was born in Netherlands, with 1919 in the USA. Transactionses on a nuclear magnetic and electronic paramagnetic resonance, nonlinear optician, a quantum electronics. Has offered to apply (1956) t. n. A method of 3 levels for building the paramagnetic quantum amplifier of a radio-frequency range. The Nobel Prize (1981, together with A.Shavlovym).

BLOMSTRAND (Blomstrand) Christian Wilhelm (1826-97), the Swedish chemist and mineralog. One of creators t. n. The chain theory of a structure of complexes. Has received (1866) metal niobium, has defined atomic weight of a titanium, niobium, etc. elements. Has discovered (1888) plane symmetric isomerism of some inorganic complexes. Has conducted the analysis of many minerals.

BLONDEL (Blondel) Moris (1861-1949), the French philosopher, the representative spiritualizma and a roman catholic modernism.

BLONDEL Francois (1618-86), the French architect, the representative of a classicism (a gate of Saint-Denis in Paris, 1672).

BLONDER (from frants. blonde - yellow-green, reddish, fair-haired, blond), a lace from a silk - raw of yellow-green colour (at conservation of natural color of raw material), and also white or black colour. In 18 century, to time of a wide circulation of a lace in Russia, a blonder alongside with women wore also men in the capacity of a jabot, sealing rings, cravats, furnish of jackets.

BLONSKY Paul Petrovich (1884-1941), the Russian teacher, the psychologist, the historian of philosophy. The creator (1919) and the professor (up to 1931) Academies of social education in Moscow. Disjointed ideas of a pedology. Has advanced the theory of labour national school, has offered the genetic theory of memory.

BLOUT (Blout) Elkan (r. 1919), the American biochemist, the foreign member of the Russian Academy of Science (1991; foreign member AN the USSR with 1976). Transactionses on probe of proteolytic enzymes and proteins in membranes of erythrocytes.

FLEAS (Bloch) Konrad Emil (r. 1912), the American biochemist. Was born in Germany, with 1936 in the USA. Has placed a role of a cholesterine in a metabolism for animal and milestones of his biosynthesis. The Nobel Prize (1964, together with F.Linenom).

FLEAS Raisa Noevna (1899-1943), the Russian poetess. In 1921 has emigrated; a vein in Berlin. Collections of verses: " Wash city ", "Tishin" (both 1935), "Covenants" (1939; together with M.Borodinoj). The poem " was brought with a random rumour... " Has become it is known as a romance from A.N.Vertinsky repertoir. Has perished in fascist concentration camp.

FLEAS Feliks (1905-83), American physics, one of founders of a quantum theory of a solid. Was born in Switzerland, with 1934 in the USA. Has developed the theory of an energy spectrum of crystals, a temperature dependence of a magnetization of ferromagnetic substance near to an absolute zero. Has discovered (1946, irrespective of E.Persella) nuclear magnetic resonance. The Nobel Prize (1952, together with Persellom).

FLEAS Ernest (1880-1959), the Swiss and American composer, the conductor. The concordance with singing "Israel" (1919), the rhapsody for a violoncello with orchestra "SHelomo" (1916) and other compositions of large forms, founded on jewish melose.

FLEAS, order of hexapods. The stomatic apparatus koljushche-sucking. Side panels no, gaskins prygatelnye. Length of 1-6 mm. Ok. 1000 kinds. Adult fleas parasitize on birds, mammals and the person, eating blood; many - carriers of causal organisms of infections, including a plague.