Mica

The mica group of sheet silicate (phyllosilicate) minerals includes several closely related materials having nearly perfect basal cleavage. All are monoclinic, with a tendency towards pseudohexagonal crystals, and are similar in chemical composition. The nearly perfect cleavage, which is the most prominent characteristic of mica, is explained by the hexagonal sheet-like arrangement of its atoms.

The word mica is derived from the Latin word mica, meaning a crumb, and probably influenced by micare, to glitter.

Classification

Chemically, micas can be given the general formula

in which

Structurally, micas can be classed as dioctahedral (Y = 4) and trioctahedral (Y = 6). If the X ion is K or Na, the mica is a common mica, whereas if the X ion is Ca, the mica is classed as a brittle mica.

Trioctahedral micas

Common micas:

Brittle micas:

Interlayer deficient micas

Very fine-grained micas, which typically show more variation in ion and water content, are informally termed "clay micas". They include:

Camacho (wrestler)

Tevita Fifita (born May 7, 1983) is a Tongan-American professional wrestler better known by his ring name Micah while his status with TNA is unknown. He is best known for working for WWE under the name Camacho between 2011 and 2014. He previously worked in WWE's developmental territory, Florida Championship Wrestling, under the name Donny Marlow where he was a one-time FCW Florida Tag Team Champion with CJ Parker. Part of a large wrestling family, he is the cousin of Bad Luck Fale, adoptive brother of Tama Tonga, and the son of Haku.

Early years

Born in Kissimmee, Florida, Fifita attended the University of Texas at El Paso [UTEP], where he played football as a defensive end. And graduated with a degree in Liberal Arts with major in Communications Electronic Media and minor in criminal justice.

Professional wrestling career

World Wrestling Entertainment / WWE

Florida Championship Wrestling (2009–2011)

On February 10, 2009, Fifita signed a developmental contract with World Wrestling Entertainment and was assigned to its developmental territory Florida Championship Wrestling (FCW) as "Tonga". In March, he became known as Agent T., as part of Washington's Secret Service stable alongside Agent D. and Agent C, He later changed his name to Donny Marlow. On July 21, 2011, Marlow and CJ Parker defeated Calvin Raines and Big E. Langston to win the FCW Florida Tag Team Championship. On November 3, Marlow and Parker lost the Tag Team Championship to Brad Maddox and Briley Pierce.

MHC class I polypeptide-related sequence A

MHC class I polypeptide-related sequence A (MICA) is a cell surface glycoprotein encoded by the MICA gene located within MHC locus. MICA is related to MHC class I and has similar domain structure, which is made up of external α1α2α3 domain, transmembrane segment and C-terminal cytoplasmic tail. However, MICA is not associated with β2-microglobulin nor binds peptides as conventional MHC class I molecules do. MICA rather functions as a stress-induced ligand for NKG2D receptor. For example, the heat shock stress pathway is involved in the regulation of MICA expression as transcription of MICA is regulated by promoter heat shock element. MICA is broadly recognized by NK cells, γδ T cells, and CD8⁺ αβ T cells which carry NKG2D receptor on their cell surface. As a result of NKG2D-MICA engagement, effector cytolytic responses of T cells and NK cells against epithelial tumor cells expressing MICA are initiated.

See also

Mute (album)

Mute is a compilation album released in 2000 on Hush Records. The disc of instrumental music is a sampler of the label's roster.

Track listing

Mute (film)

Mute is a 2005 American short drama film directed by Melissa Joan Hart and written by Kristin Lipiro. The film stars Emily Hart, Emily Deschanel and Dylan Neal.

Cast

External links

Mute (music)

A mute is a device fitted to a musical instrument to alter the sound produced: by affecting the timbre, reducing the volume, or most commonly both.

Musical directions for muting

The use of a mute is usually indicated in musical notation by the direction con sordino (often abbreviated con sord, sord, sordino). (Sordina, with plural sordine, is the strictly correct Italian term for mute as used on string instruments; but the forms con sordino, senza sordino, sordino via, etc., are much more commonly used as terms in music than the forms con sordina, senza sordine, etc.) The mute should be removed with the senza sordino (or senza sord, senza sordina, etc.) direction.

When written in English the directions, "mute" and "open" (for brass instruments) or "unmute" (for stringed instruments) are used.

The equivalent German terms for "with mute" ("mute on") are mit Dämpfer (Dämpfer auf), and for "without mute" ("mute off") are ohne Dämpfer (Dämpfer ab/weg). The word Dämpfer is cognate to English "damper".