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delta

 [del´tah]
1. the fourth letter of the Greek alphabet, Δ or δ; used in chemical names to denote the fourth of a series of isomeric compounds or the carbon atom fourth from the carboxyl group, or to denote the fourth of any series.
2. a triangular area.

Δ

1. Fourth letter of the Greek alphabet, delta.
2. In chemistry, denotes a double bond, usually with a superscript to indicate position in a chain (Δ5), application of heat in a reaction (A B), absence of heat treatment (), distance between two atoms in a molecule, or position of a substituent located on the fourth atom from the carboxyl or other primary functional group (δ); change (Δ); thickness (δ); chemical shift in NMR (δ).
3. anatomy a triangular surface.

del·ta (Δ),

(del'tă),
1. Fourth letter of the Greek alphabet, Δ (capital), δ (lower case).

YY1

A gene on chromosome 14q that encodes a ubiquitous transcription factor belonging to the GLI-Kruppel class of zinc finger proteins, which directs histone deacetylases or histone acetyltransferases to myriad promoters activating or repressing their activity, implicating histone modification in YY1 activity.

δ,

Δ
Abbreviation for delta; diopter.

del·ta

(Δ, δ) (del'tă)
1. Fourth letter of the Greek alphabet.
2. chemistry A double bond, usually with a superscript to indicate position in a chain (Δ5); application of heat in a reaction (A B); absence of heat treatment (Δ); distance between two atoms in a molecule, or position of a substituent located on the fourth atom from the carboxyl or other primary functional group (δ); change (Δ); thickness (δ); chemical shift in NMR (δ).
3. anatomy A triangular surface.

Δ

, δ
1. Fourth letter of the Greek alphabet, delta.
2. anatomy a triangular surface.
References in periodicals archive ?
Expert vehicle technician Alan Priestley preparing Iconic 1960's Deltic locomotive 'King's Own Yorkshire Light Infantry' (KOYLI), at the National Railway Museum at Shildon, County Durham, ahead of it's important role alongside steam legend Flying Scotsman in the museum's ground breaking 'Stunts, Speed and Style' display, which will take place at its York site in March 2016 and form part of its highly anticipated Scotsman Season
Not a great deal, but a good deal," said Al Sebastian of Prospect Advisors LLC of Stamford, Connecticut, a close follower of Deltic. "The premium is on the low side, but Potlatch is the most logical buyer of these assets.
But the spokesman admitted the Deltic diesel had also been used to pull trains while engineering work was being carried out on parts of the West Coast Main Line from Birmingham to London that required overhead electric cables to be switched off.
Under the plan from Deltic, Britain's biggest night club operator, Revolution would own 65% of a combined entity and Deltic the remaining 35%, creating a bar giant with annual sales of more than PS270 million.
Deltic owns 57 clubs and bars including the Prysm, Atik and Oceana brands He said: "We are now looking at building up a pipeline and we've doubled the size of our property department to do that.We have nothing in Manchester, Liverpool, Glasgow and Newcastle, so obviously they are in the mix."
The proposed tie-up sees Deltic go head-to-head with Slug And Lettuce owner Stonegate, which struck an agreement in August to acquire Revolution Bars in a PS101.5 million deal.
"I retire knowing Deltic is well positioned to deliver excellent future financial and operational results," he said in the announcement.
Headquartered in El Dorado, Arkansas, Deltic Timber is a natural resources company focused on the efficient and environmentally responsible management of its land holdings.
Deltic is proposing an all-paper merger that would see embattled Revolution own 65% of the combined business and Deltic the remaining 35%.
New owners Deltic said it was spending PS1.4 million on the Broad Street nightspot and launching it as PRYZM club.
The board of directors of Deltic Timber Corporation (NYSE:DEL) approved a quarterly dividend of USD0.10 per share, the company reported on Thursday.
Ray Dillon, who has led Deltic since July I, 2003, also works with both industry trade associations and community-oriented nonprofit organizations.