National Indigenous Radio Service

The National Indigenous Radio Service is a satellite program feed available in Australia to community radio stations that are subscribers of the CBAA’s Community Radio Network. The NIRS provides targeted and specialist programming for and by Australia’s Aboriginal and Torres Strait Islander broadcasters. From its base in Brisbane the NIRS provides a feed of programs and music supplied by a number of contributing stations including Koori Radio, 4AAA and 8KNB.

Subscribing stations are able to re-transmit individual programs or entire blocks of program time as needed. As NIRS is broadcast 24 hours a day, stations with limited resources who are unable to provide a full-time service can use NIRS to fill the gaps between local programming. For those radio stations that already broadcast 24 hours a day, NIRS gives them access to national coverage of current affairs and indigenous issues, which some stations may not have the resources to provide themselves.

Funding

ACR

ACR may refer to:

Places

Military and weapons

Organizations

Science and technology

Acrosin

Acrosin is a digestive enzyme that acts as a protease. In humans, acrosin is encoded by the ACR gene. Acrosin is released from the acrosome of spermatozoa as a consequence of the acrosome reaction. It aids in the penetration of the Zona Pellucida.

Function

Acrosin is the major proteinase present in the acrosome of mature spermatozoa. It is a typical serine proteinase with trypsin-like specificity. It is stored in the acrosome in its precursor form, proacrosin. The active enzyme functions in the lysis of the zona pellucida, thus facilitating penetration of the sperm through the innermost glycoprotein layers of the ovum. The mRNA for proacrosin is synthesized only in the postmeiotic stages of spermatogenesis. In humans proacrosin first appears in the haploid spermatids.

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This article incorporates text from the United States National Library of Medicine, which is in the public domain.