(n.) The green mineral characteristic of the greensand of the chalk and other formations. It is a hydrous silicate of iron and potash. See Greensand.
Example Sentences:
Mica
Definition:
(n.) The name of a group of minerals characterized by highly perfect cleavage, so that they readily separate into very thin leaves, more or less elastic. They differ widely in composition, and vary in color from pale brown or yellow to green or black. The transparent forms are used in lanterns, the doors of stoves, etc., being popularly called isinglass. Formerly called also cat-silver, and glimmer.
Example Sentences:
(1) A comparison is made between the results obtained by the mica adsorption technique and those obtained by conventional preparation techniques involving fixation and staining.
(2) X-ray microprobe analysis identified particles which related to the known exposures, superimposed on a background of other particles related to smoking (kaolinite and mica) or to the general environment (silicon, titanium, and iron).
(3) The Responsible Mica Initiative aims to eradicate not only child labour but also unacceptable working conditions in the Indian mica supply chain.
(4) In all cases the inhibitory capacity of MICA on liver gluconeogenesis was significantly higher when injected intraperitoneally.
(5) This has been possible by (1) the use of specially modified SFM tips with a consistent radius of curvature of 10 nm or less, to minimize the amount of image distortion introduced by the finite dimensions of commercially available tips, (2) the optimization of a method to deposit and bind DNA molecules to the mica surface in a stable fashion, and (3) careful control of the sample humidity, to prevent solvation of the molecules and detachment from the surface by the scanning tip or stylus.
(6) Lambs fed the control and Mg-Mica diets absorbed similar (P greater than .05) quantities of Mg in the preintestinal region and less (P less than .05) than lambs fed the MgO, MgC and MgOH diets.
(7) MICA patients also reported greater overall distress than did psychiatric patients without substance abuse problems.
(8) We have imaged with scanning force microscopy in air fibronectin (Fn) molecules sprayed on mica and on polymethylmetacrylate (PMMA), the latter being extensively used as biomaterial for implants.
(9) Histopathological changes in the tracheo-bronchial lymph nodes were studied up to 365 days in guinea pigs following intratracheal injection of a suspension of mica dust.
(10) This mica was also present on filtration membranes of atmospheric air samples obtained from the San Diego Zoo.
(11) Natural objects (pebbles or pieces of mica) were also pressed into the wet clay, while in the palaces, pillars were covered with bronze plaques illustrating the victories and deeds of former kings and nobles.
(12) We present scanning force microscopic images of the virus embedded in 0.5% buffered phosphotungstic acid solution adsorbed on a freshly cleaved mica surface, and imaged under atmospheric conditions.
(13) PPG and Axalta, two of the world’s largest car paint suppliers, have joined a global initiative to purge child labour from the mica industry after a Guardian investigation linked child labour in their supply chains to Vauxhall, Volkswagen and BMW.
(14) Seven epidemiologic studies have been performed among mica-processing workers, and these studies are all cross-sectional.
(15) We have imaged single-stranded 25mer DNA that was adsorbed on treated mica or that was covalently bound with a crosslinker to a polymerized Langmuir-Blodgett (LB) film, the top monolayer of a bilayer system.
(16) Atomic force microscopy (AFM) was used to image reovirus double stranded RNA (dsRNA) deposited from diluted buffer solution onto a chemically treated mica surface.
(17) Human erythrocytes were attached to cover slips (glass or mica) treated with aminopropylsilane and glutaraldehyde, and then disrupted by direct application of a jet of buffer, which removed the distal portion of the cells, thus exposing the cytoplasmic surface (PS) of the flattened membranes.
(18) The BMW Group welcomes the fact that this [unnamed] paint supplier and its tier-two supplier have joined other companies in the Responsible Mica Initiative,” said Kai Zöbelein, sustainability spokesperson for BMW Group.
(19) The documentation of prolonged exposure to mica, the clinical and radiographic features of severe interstitial fibrosis, and the histopathologic delineation of the interstitial lesion, including spectroscopic and crystallographic verification of crystalline mica, support the causal relationship between mica and interstitial fibrosis.
(20) She adds that while there is legislation to protect children, “there is still no or little enforcement on local level ... due to corruption, lack of capacity and children who are not registered.” McQuaide says the answer to child labour in mica mining will not be found in company boycotts, audits or social projects, however well meaning, but instead in efforts that push recalcitrant governments to act.