blast


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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

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]
References in periodicals archive ?
Four other policemen were also injured in the blast and they too were recovering, said the spokesman.
President Arif Alvi, speaker National Assembly Asad Qaisar, deputy speaker Qasim Khan Soori, chairman Senate Sadiq Sanjarani, state minister for interior Shehryar Afridi, chief minister Balochistan Jam Kamal, chief minister Punjab Usman Buzdar, chief minister Sindh Murad Ali Shah and other political leaders have condemned the blast in strongest terms.
He said blast caused no damage and similar blast had occurred sometime ago at the same spot.
Speaking to the media, Capital City Police Officer Peshawar Qazi Jameel said that eighth to 10 kilograms of explosive material was used in the blast.
Surface blasting of the HSS drill components is achieved with three powerful Guyson model 900 blast guns mounted on a vertically traversing arm, stroking up and down the various drill lengths, and then a post blast compressed air wash is directed at the drills to remove residual dust and blast media.
This article will discuss why these design approaches fail and how modern approaches to spacing and blast design dramatically improve performance of blasts, and how blasts and entire mines should be designed to minimize total operation cost.
The achievement of these goals and the optimization of a blast casting operation can lead to large savings for a company, by either increasing the efficiency or reducing the necessary workload of the excavator and replacing it with explosive energy.
Soon after the blast, Bomb Disposal Squad (BDS) officials reached the site of the incident and defused a second bomb, with at least two kilograms of explosives.
Orica Chief Commercial Officer, Angus Melbourne, describes how Oricas digital technologies are helping customers, saying: The downstream impact of variable and poorly controlled blast outcomes today can impact as much as 80% of the Total Mine Processing Costs, this presents a significant opportunity for the industry.
So far no group claimed responsibility of the blast but it was the second blast in a month on forces in Pak-Afghan bordering city Chaman.
In the first blast, which killed four people and wounded eight others, the explosive device is said to have been carried into central Kabul by a motorbike.
No other injuries were reported in the incident, SSP Pir Mohammad Shah said while talking to the media after the blast.