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blast

 [blast]
1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination, as in ameloblast and trophoblast.
blast cell.
2. the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary damage and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and effects in the central nervous system.

blast

(blast),
General term for immature or precursor cell.
[G. blastos, germ]

blast

(blast)
1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination (see -blast ).
2. blast cell (2).

blast

(blast) the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary concussion and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and minor effects in the central nervous system.

blast

1 a primitive cell, such as an embryonic germ cell.
2 a cell capable of building tissue, such as an osteoblast in growing bone.

BLAST

Basic Local Alignment Search Tool. A nucleic acid- and protein-sequence comparison algorithm which is used to find matches in gene sequences and to search sequence databases for optimal local alignments to a query sequence.

BLAST uses a heuristic algorithm, seeking local alignments and creating a matrix of similarity scores for all possible pairs of residues, defining high-scoring segments, statistically evaluating the significance of the results and detecting relationships among sequences which share only isolated regions of similarity.

blast

noun Hematology A general term for a primitive blood cell. See Blast cell, Blast crisis.

blast

(blast)
General term for immature or precursor cell.
[G. blastos, germ]

BLAST (Basic Local Alignment Search Tool)

a sequence comparison algorithm used to search DNA or PROTEIN databases. For example, BLASTN is used for homology searching to compare nucleotide sequences.

The query sequence is entered and compared with a nucleotide sequence database.

blast

(blast)
General term for immature or precursor cell.
[G. blastos, germ]

blast

1. an immature stage in cellular development before appearance of the definitive characteristics of the cell; used also as a word termination, as in ameloblast, etc.
2. the wave of air pressure produced by the detonation of high-explosive bombs or shells or by other explosions; it causes pulmonary damage and hemorrhage (lung blast, blast chest), laceration of other thoracic and abdominal viscera, ruptured eardrums, and effects in the central nervous system.

blast cells
the precursor cells of bone marrow. See also myeloblast, monoblast, erythroblast, megakaryoblast.
References in periodicals archive ?
If the Wednesday blasts were conducted in the usual manner, they should have registered at a recording station in Nilore, Pakistan, 700 kilometers north, says Paul Richards of the Lamont-Doherty Earth Observatory in Palisades, N.
Indian officials claim that the largest blast was a hydrogen bomb with a yield of 43 kt.
Among the residents startled by last week's blast was Michelle Koetke, chairwoman of Residents to Preserve Newbury Park and an opponent of Dos Vientos Ranch.
Koetke said she was in the kitchen preparing dinner when the blast shook her house and rattled her windows.
Nonferrous metals are too soft to withstand the materials used to blast ferrous metals, and instead use soft steel, copper or bronze shot or glass beads.
All blastcleaning machines consist of a material handling system for positioning the work in the blast stream(s); a cabinet to house the operation and safely contain the blasting medium; an abrasive throwing mechanism (usually a centrifugal throwing wheel); and an abrasive recycling system for cleaning the abrasive and returning it to the wheel for reuse.
creates, designs, develops, manufactures and markets proprietary blast mitigation materials.
Yosemite air blasts are much rarer than large landslides, he noted.
They've wasted so much time, it's disgusting," Masahiko Watanabe said, referring to the long delays between the blasts Sunday and Monday and an 11-hour stretch after the accident Saturday during which rescue officials deliberated over how to proceed.
In order for the Naval Explosive Ordnance Disposal Technology Division to accurately evaluate the performances of blast resistant trash receptacles for the Department of Homeland Security, Office of Domestic Preparedness, it is critical that appropriate technical performance standards be established that define the degree of performance and resultant physiological damage in (1) preventing primary and secondary fragmentation, and (2) defining the actual pressure encountered at a given standoff distance.
For example, with the understanding of blast pressure and blast direction, MSI knows that a side loading trash lid is irresponsible.