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atmosphere

 [at´mos-fēr]
1. the entire gaseous envelope surrounding the earth and subject to the earth's gravitational field.
2. the air or climate in a particular place. adj., atmospher´ic.
3. a unit of pressure, being that exerted by the earth's atmosphere at sea level; equal to 1.01325 × 105pascals (approximately 760 mm Hg). Abbreviated atm.

atm

atm

atmosphere (3).

atm

1 abbreviation for atmosphere.
2 abbreviation for atmospheric.

ATM

Ataxia telangiectasia mutated. A checkpoint kinase which transduces genomic stress signals to stop cell cycle progression and promote DNA repair, acting via p53, a tumour suppressor protein. Its cognate gene, ATM (see below), is mutated in ataxia telangiectasia, a rare neurodegenerative disease characterised by ataxia telangiectasias, increased chromosome fragility when exposed to ionising radiation and predisposition to lymphomas.

ATM (Gene)
A gene on chromosome 11q22-q23, which encodes a PI3/PI4 cell-cycle checkpoint kinase that phosphorylates, thereby regulating a broad range of downstream proteins—e.g., tumor suppressor proteins p53 and BRCA1, checkpoint kinase CHK2, checkpoint proteins RAD17 and RAD9, and DNA repair protein NBS1.

Mutated in
Ataxia-telangiectasia.

atm

Abbreviation for standard atmosphere.

ATM,

atm

atmosphere.
References in periodicals archive ?
Two versions of the CrossFire ATM155 Uplink modules are available: the OC-8320 for UTP-5 copper with a shielded RJ45 connector interface; and the OC-8321 for a 155Mbps Optical Carrier (OC)-3c multimode optical interface with a duplex SC connector.
Olicom's CrossFire ATM155 Uplinks (OC-8320 and OC-8321) for the CrossFire Token-Ring Switch (OC-8600) are priced at $3,495 and $3,995 respectively, and will be available in November 1997.
Each port on an ATM155 Network Option module supports 2048 VCCs (Virtual Channel Connections) and 64 VPCs (Virtual Path Connections).
Whitetree's Workgroup Switches automatically detect the presence of an ATM155 Network Option module and configure it to default or previously configured settings.
Whitetree's new ATM155 Network Option Modules are available immediately through Whitetree authorized resellers.
Additional products, including an ATM155 workgroup switch, scheduled for delivery in early 1997, are currently under development.
Whitetree plans to deliver a series of ATM155 switches called the WS4000(TM) Workgroup Switch line of products.
The switch also supports high-speed ATM networking with its optional ATM155 Network Option module for connectivity to backbone ATM switch/router, server or client end stations.