BLASTULA (from grech. blastos - a germ), a stage of development of a germ of metazoans during a blastulation - a concluding phase of the season{term} of cleavage eggs. The structure of a blastula depends on cleavage pattern, quantity and distribution of a yolk in an ovum. Many animal at the stage of a blastula have a cavity - blastotsel.

BLATENSKOE the PRINCIPALITY, in 9 century the slavonic state in area an eskar. Balaton. Center - Blatengrad, is based by prince Pribinoj. In 874 Blatenskoe the principality was part Velikomoravskoj of the mandatory power.

BLAU (Blaeu), family of the Netherlands scientists and cartographers - publishers: Willem Janszon (1571-1638), etc. Firm Blau emitted earth and celestial globes, multivolume atlases (" the New atlas ", " the Major atlas ") - collection of maps, geographycal texts (are transferbed{translated} to many tongues).

BLAU (Blau) Marietta (1894-1970), Austrian physics. In 1939-60 worked in the USA, in 1960 has returned to Austria. Transactionses on a radioactivity, physics of ultrarays, a nuclear physics. For the first time has applied in 1936 photoplates to probe of ultrarays.

BLAUMANIS (Blaumanis) Rudolf (1863-1908), the Latvian writer. Stories about life of the Latvian peasantry (the collection " At light of a shive ", 1893), plays (" Sins Triny ", 1896, " Malicious spirit ", 1891). Satirical verses on political themes.

BLASHKOVICH (Blasckovic) Dioniz (r. 1913), a Czechoslovak microbiologist and the virologist, the academician (1952), the vice-president (1961-65) Czechoslovak AN, the foreign member of the Russian Academy of Science (1991; foreign member AN the USSR with 1966). Transactionses on natural ochagovosti, circulations in a nature of pathogenic viruses, a general virology, hygiene.

DEATH CUP, the most toxicant flap-type mushroom from a stem a fly mushroom. A cap green or virescent up to white, with white plates. A leg with a paleaceous ring and a sacculate sheath. In deciduous, less often coniferous forests of Eurasia and the Sowing. America.

BLEJK (Blake) Peter (r .1920), the American architect and the theorist of the modern architecture. The writer of designs private{individual} and public buildings in international style. Books " Skilful builders " (1960), " the Form sluduet for a fiasco " (1977), etc.

BLEJK (Blake) William (1757-1827), the English poet and the artist. Collections " Songs of ignorance " (1789), " Songs of knowledge " (1794), "prophetical" poems (1789-1820) in mythological and biblical modes{images} have reflected events of the French revolution kon. 18 century and the American War for independence. For poetry Blejka, as well as for his{its} case histories to natural books and to " the Heavenly comedy " Dante, the romantic fantasy, philosophical allegory are characteristic.

BLEJLER (Bleuler) Ejgen (1857-1939), the Swiss psychiatrist and the psychologist. Has described (1911) schizophrenia as do-it-yourself disease.

BLEJMAN Michael Jurjevich (1904-73), the Russian film writer, the critic. Scripts of films (over 40, some in the co-authorship): " Exploit of the scout ", " It was in Donbass ", " the Alarming youth ". The state premium of the USSR (1948).

FADED ORE, group of minerals of subclass of the composite sulphides which are generatrix an isomorphous number{series} tennantit Cu12As4S13 - tetraedrit Cu12Sb4S13. Impurity{additives} Ag (frejbergit - up to 17 %), Zn, Fe, Hg. Stalno-grey, iron - black acinose units, grains. Hardness 3-4,5; firmness of 4,6-5,4 g / sm3. Are part some copper ores, antimony, silver, mercury are extracted{drawn} also.

BLEKSLI (Blakeslee) (Blejksli) Albert Frensis (1874-1954), American botanik and genetics. In 1927 together with S.Gejdzherom experiences on a datura has proved a capability of obtaining of mutations under action of radiation. Has discovered (1904) phenomena of a heterothallism for mushrooms. Has discovered (1937, together with O.T.Ejveri) a method of obtaining poliploidnyh mutations for plants, acting on them a colchicine. The initiator of a method of cultivation of germs of plants.

BLENVIL (Blainville) Anri (1777-1850), the French zoologist and the anatomist, foreign corresponding member Petersburg AN (1840.) has finally separated taxonomic group amphibian from kowtowing, has divided{separated} mammals on a bird, dvu-and monodelphic (sovr. Onepass, ascigerous, placental).

SHADE SVETOZASHCHITNAJA, the adaptation routinely by the way the cylinder or a cone, mounted on forefront of a lens carriage for an avoidance of hit in him{it} of marginal rays.

BLENNOREJA (from grech. blennos - mucilage and rheo - I stream), the acute purulent conjunctivitis called gonokokkom. Arises more often for neonatal which catch during stems from an ill gonorrhea of mother. Can reduce in blindness.

BLERIO (Bleriot) Lui (1872-1936), the French aircraft designer and the pilot, one of pioneers of aircraft. With 1906 plotted airplanes. First has flown through a channel over La Manche (1909).

LUSTER of a heavenly body, the illuminating intensity created by a heavenly body in a place of supervision{observation} on a perpendicular plane to rays; it is measured in stellar magnitudes.

LUSTER, a qualitative behavior of properties of the surface which are reflecting light. Stringent scientific definition of concept of lusters misses.