(n.) A minute mineral form like those common in glassy volcanic rocks and some slags, not having a definite crystalline outline and not referable to any mineral species, but marking the first step in the crystallization process. According to their form crystallites are called trichites, belonites, globulites, etc.
Example Sentences:
(1) Although the crystallite widths were similar in both AI and normal enamel, the AI teeth showed areas where the crystallite order and continuity appeared disrupted.
(2) Dual aspects, crystallite size and lattice imperfection related to the crystallinity were analyzed by the process of Variance and Fourier analysis based on the X-ray diffraction line profiles.
(3) A corresponding gradient of PA reaction product was observed on the opposing enamel crystallites.
(4) These prior studies were interpreted to show that the crystallites must be within the hole zones.
(5) The amount of adhering platelets was minimum for the surfaces of the copolymers having a crystallite thickness of 6.0-6.5 nm and a long period of 12-13 nm.
(6) The surface area of the crystallites forming inside the protein increases until the molecule is half full, and then declines.
(7) Dimeric SLS, on the other hand, accounts for the majority of the crystallites seen in preparations of collagen types II and V. Dimeric SLS from both collagen types II and V reveal overlap zones at the carboxy-terminal ends of the collagen molecules.
(8) It is shown that the organic structure of the biomineral effects the properties of inorganic crystallites by means of the spatial geometric factor.
(9) Electron microscopy has revealed that chitin from a representative selection of insect orders (plus one crustacean and one arachnid) is localized in crystallites about 2.8 nm across.
(10) The orderly formation of rod and interrod enamel containing precisely-oriented hydroxyapatite crystallites requires a high degree of cellular cooperation.
(11) These microfibers have a diameter of 80 A and may consist of chitin crystallites surrounded by a matrix coat.
(12) Although no changes in serum chemistry, bone chemistry, or bone histology could be found, the young castrated animals versus controls showed less density of bone mineral as determined by the density fractionation technique and smaller crystallite size of mineral particles as determined by x-ray diffraction line-broadening analysis.
(13) The palladium-silver alloy had inhomogeneous crystallites.
(14) We therefore conclude that the early crystallites still contain lattice defects, which are annealed out to some degree with crystal growth.
(15) Although reconstituted fibres from solutions of skin and cartilage collagen are similar, the segment-long spacing crystallites formed with pepsin-solubilized cartilage collagen present a symmetrical and dimeric form corresponding to the lateral aggregation of two monomers with an overlap (90nm) of the C-terminal ends.
(16) The crystallite size is also affected by the presence of 32P.
(17) By adjustment of various parameters affecting crystallite size in thin metal replica films used for contrasting biological macromolecules for electron microscopy, improvements in the level of image information retrieved are demonstrated.
(18) Using electron microscopic microprobe analysis, it was shown that the peripheral mineralized region, consisting mainly of closely packed needles, often contained 100% more mineral substance than the central, mineralized collagen zone, which consisted mainly of plate-like crystallites.
(19) The investigation of the degree of interpenetration between the two component phases of whewellite kidney stones, the protein matrix and calcium oxalate monohydrate crystallites, is extended by a technique of microchemical analysis, employing X-ray photoelectron spectroscopy (XPS).
(20) Cartilage crystallites, except those of the epiphysis, are more rough-grained in the old than in the young animals.
Pitchstone
Definition:
(n.) An igneous rock of semiglassy nature, having a luster like pitch.