What's the difference between spherule and variolite?
Spherule
Definition:
(n.) A little sphere or spherical body; as, quicksilver, when poured upon a plane, divides itself into a great number of minute spherules.
Example Sentences:
(1) The intestinal cells are filled with concentric spherules, and the intestinal lumen is reduced.
(2) The egg cortex is enriched in two organelles, ectoplasmic spherules and associated structures, which are similar in appearance to nuage.
(3) Melanin synthesis in the myxomycete Physarum polycephalum occurs during sporulation but not during spherule formation.
(4) synaptic ribbon (SR) and synaptic spherule (SS) numbers, was explored in 6 different stocks and strains of laboratory rats, viz.
(5) Applying immunological and electron microscopical techniques it is shown that insulin is produced in specialized cells (spherulous cells).
(6) The lunar particles found in the sample include: (i) spherules, rotational ellipsoids, dumbbells, tear-drops, rings, and crescents which have (ii) diameters of 0.1 to 500 microns; (iii) budlike features on the particles; and (iv) chemical inhomogeneity (electron probe).
(7) Types II and VI collagen were not detected in collagenous spherules of salivary gland tumors.
(8) Special stains indicated that the spherules were collagen-rich, but also contained variable amounts of acidic mucin, PAS-positive, basement membrane-like material, and elastin.
(9) The results established that C-ASWS from mycelia or spherule cell walls is heterogeneous in composition, containing two distinct antigenic components.
(10) A method which localizes labile 5% ethylene glycol-bis-(beta-amino-ethyl ether)N-N'-tetraacetic acid-removable calcium in spherules within hypertrophied chondrocytes and in pericellular matrix using alizarin red S (ARS) is described.
(11) During the period of high ribbon density, rod spherules with two, or even three ribbon profiles, were routinely observed.
(12) The composition of purified wall fragments from the spherule wall of Physarum polycephalum has been studied.
(13) Histological examination revealed endosporulating spherules in a caseous lesion of the epithelioid granulomas, and fungal cultures demonstrated barrel-shaped arthropores.
(14) In undecalcified sections ultrastructurally calcified spherules were found that often consisted of radially arranged hydroxyapatite crystals.
(15) Where calcification was more extensive, the matrix vesicles were no longer visible having been buried calcified among spherules.
(16) Equimolar mixtures of egg lecithin and lysolecithin formed the more usual smectic, concentric lamellae (liposomes) and elongated rod-like micelles which might be bimolecular fragments of spherules.
(17) Free spherules and shrunken degenerative forms were present as well.
(18) The encystment of Physarum polycephalum plasmodia, also called spherulation, involves the synthesis of many specific mRNAs and proteins.
(19) The spherule-endospore cycle was maintained in tissue culture medium for 84 days without the formation of detectable hyphae.
(20) The spherules are altered red blood cells that form as the result of prolonged contact with necrotic fat or petrolatum-based ointments.
Variolite
Definition:
(n.) A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance.