SCA
SCA may refer to:
Organizations
Locations
Shuttle Carrier Aircraft
The Shuttle Carrier Aircraft (SCA) were two extensively modified Boeing 747 airliners that NASA used to transport Space Shuttle orbiters. One is a 747-100 model, while the other is a short range 747-100SR.
The SCAs were used to ferry Space Shuttles from landing sites back to the Shuttle Landing Facility at the Kennedy Space Center, and to and from other locations too distant for the orbiters to be delivered by ground transport. The orbiters were placed on top of the SCAs by Mate-Demate Devices, large gantry-like structures that hoisted the orbiters off the ground for post-flight servicing then mated them with the SCAs for ferry flights.
In approach and landing test flights conducted in 1977, the test shuttle Enterprise was released from an SCA during flight and glided to a landing under its own control.
Design and development
The Lockheed C-5 Galaxy was considered for the shuttle-carrier role by NASA, but rejected in favor of the 747—in part due to the 747's low-wing design in comparison to the C-5's high-wing design, and also because the U.S. Air Force would have retained ownership of the C-5, while NASA could own the 747s outright.
Sca-1
Sca-1 stands for "Stem cells antigen-1". It consist of 18-kDa mouse glycosyl phosphatidylinositol-anchored cell surface protein (GPI-AP) of the LY6 gene family. It is the common biological marker used to identify hematopoitic stem cell (HSC) along with other markers.
Application of Sca-1
References
Immunity
Immunity may refer to:
Medicine
Biology
Law
- Absolute immunity, a type of immunity for government officials that confers total immunity when acting in the course of their duties
- Amnesty law, a law that provides immunity for past crimes
- Charitable immunity, immunity from liability granted to charities in many countries from the 19th century to the mid-20th century
- Diplomatic immunity, agreement between sovereign governments to exclude diplomats from local laws
- Immunity from prosecution (international law), exclusion of governments or their officials from prosecution under international law
- Judicial immunity, immunity of a judge or magistrate in the course of their official duties
- Parliamentary immunity, immunity granted to elected officials during their tenure and in the course of their duties
- Qualified immunity, in the United States, immunity of individuals performing tasks as part of the government's actions
- Sovereign immunity, the prevention of lawsuits or prosecution against rulers or governments without their given consent
- Sovereign immunity in the United States, the legal privilege by which the American federal, state, and tribal governments cannot be sued
- Spousal privilege, also called spousal immunity, protects a spouse from testifying against the defendant
- State immunity, principle of international law that the government of a state is not amenable before the courts of another state
- Witness immunity, immunity granted to a witness in exchange for testimony
Immunity (journal)
Immunity is a monthly peer-reviewed medical journal of immunology published by Cell Press. The journal was established in December 1994, and is edited by Peter T. Lee.
Abstracting and indexing
The journal is abstracted and indexed in:
According to the Journal Citation Reports, the journal has a 2014 impact factor of 21.561, ranking it third out of 148 journals in the category "Immunology".
Notes and references
External links
Legal immunity
Legal immunity, or immunity from prosecution, is a legal status wherein an individual or entity can not be held liable for a violation of the law, in order to facilitate societal aims that outweigh the value of imposing liability in such cases. Such legal immunity may be from criminal prosecution or from civil liability (being subject of lawsuit) or both. The most notable forms of legal immunity are diplomatic immunity, judicial immunity, and witness immunity. One author has described legal immunity as "the obverse of a legal power", explaining:
Criticism
Legal immunities may be subject to criticism because they institute a separate standard of conduct for those who receive them. For example, as one author notes:
Types of legal immunity
Immunity of government officials
Many forms of immunity are granted to government officials in order to enable them to carry out their functions without fear of being sued or charged with a crime for so doing:
Podcasts:
