spherules


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spherules

double-contoured, highly refractile bodies in which the fungus Coccidioides immitis occurs in animal tissues. Called also sporangia.
References in periodicals archive ?
Direct examination: Direct microscopical examination of the secretions (alveolar aspirate, cerebrospinal fluid, exudate) stained with calcofluor-white (which joins the chitin or cellulose of the cell wall) and observed in a fluorescence microscope, allow the visualizing the spherules with a 22% sensitivity.
The geochemistry and mineralogy profiles of the spherules are identical to rock found in southern Quebec, where Sharma and his colleagues argue the impact took place.
With a cooling rate of 5[degrees]C/min, the morphology was mixed type birefringent spherules with well-defined spherulitic boundaries; whereas with a cooling rate of 1[degrees]C/min, the morphology revealed a roughly disordered crystalline growth without visible spherulitic boundaries.
The results were interpreted as indicating the presence of spherical fine-grained (~ 4-5 nm) magnetite particles, suggested to come from weathered glass spherules produced by the Chicxulub impact.
Moreover, industrial spherules may contaminate the natural glasses, both at the outcrop and during laboratory treatments [3-5].
In some cases the transition from the fine baculi to thicker, aggregated baculi can be observed: the apatitic spherules cover the fine baculi and form their granular surface (Fig.
Some are faceted as if by wind, some are strongly pitted like frothy lava or as if small spherules have been plucked out, some are rounded as if they underwent prolonged transport by water before they arrived here, and others are slabby and may simply be broken chunks of local, hardened, soil.
The surface of the top layer shows mineral-free chitin threads interspersed sporadically with ACC spherules 40 to 50 nm in size (Fig.
Arthrospores are inhaled and converted to spherules in the lung where they swell, sporulate, burst, and release spores.
2]/g) and water molecules can occupy the interior of the aliophane spherules as well as being adsorbed onto the outer AlOH surface (Rousseaux and Warkentin 1976; Parfitt 1990; Regalado 2006).
A transbronchial fine needle aspirate of a subcarinal lymph node demonstrated lymphoid tissue with a granuloma and rare intracellular spherules subsequently identified as Coccidioidis immitis.
The large spherules (10-80 mcm) are easily seen under microscopy, typically as granulomatous or suppurative inflammatory infiltrate.