What's the difference between obsidian and perlite?

Obsidian


Definition:

  • (n.) A kind of glass produced by volcanoes. It is usually of a black color, and opaque, except in thin splinters.

Example Sentences:

  • (1) ‘The job is fun, but should never be more than 40 hours per week’ Veteran game designer Chris Avellone, now co-owner of Obsidian Entertainment, focuses on downscaling.
  • (2) In Mesoamerica, the Aztec empire promoted a militaristic state ideology and developed extensive trade networks to secure valued materials, including obsidian and exotic and symbolically powerful materials such as the shimmering, iridescent feathers of the quetzal bird.
  • (3) The victims are splayed on a column at the top of a pyramid, and a priest cracks their ribcage open with an obsidian knife to pluck out their still-beating hearts.
  • (4) A method for analysis of Ni concentrations in tissues is described, which involves (a) tissue dissection with metal-free obsidian knives, (b) tissue homogenization in polyethylene bags by use of a "Stomacher" blender, (c) oxidative digestion with mixed nitric, sulfuric, and perchloric acids, and (d) quantitation of Ni by electrothermal atomic absorption spectrophotometry with Zeeman background correction.
  • (5) It will come in three colours: black, grey and obsidian and goes on sale in 2018.
  • (6) It’s a fun job, but it shouldn’t be an exploitative one Chris Avellone, Obsidian Entertainment The need to appease both parties can lead to blow-outs.

Perlite


Definition:

  • (n.) Same as Pearlite.

Example Sentences:

  • (1) Groups of 21 male and 21 female mice were given diets containing 20%, 10%, 1% or 0% (control) perlite for 28 weeks.
  • (2) Of three contained N-matter tested, hydroxy proline was the best sources of N-atom for Fusarin C. Under the absence of hydroxy proline, the Fc wasn't synthesized in perlite-liquid culture medium by F. moniliforme.
  • (3) Pulmonary function was studied in 117 men employed in three plants engaged in the mining and processing of perlite.
  • (4) CP grow best in three parts sphagnum moss peat to one part perlite, although the CPS is trialling peat-free mixes using coir.
  • (5) Larvae were held in either 24-well culture plates with media plus penicillin, streptomycin sulfate, nystatin, and chloramphenicol or in small salve jars on Perlite and media plus the same antibiotics.
  • (6) There was instead a slight increase in FVC associated with years in the perlite industry.
  • (7) In summary, the population of men available for study in the major perlite-producing area of the United States, who have worked for periods up to 23 years, showed no evidence of pneumoconiosis by chest radiography or by measurement of forced vital capacity.
  • (8) The paper describes a method for isolating alkaline ribonuclease from the culture liquid Bacillus subtilis KP 349 which involved: submerged cultivation of the producer on complex and synthetic nutrient media with optimized RNase activity, acid treatment of the total culture liquid, and filtration through perlite.
  • (9) The purification process takes advantage of the novel use of perlite (a filter aid) for the simultaneous purification of PT and FHA.
  • (10) The process consists of chromatographies on perlite then on hydroxylapatite.
  • (11) Lead uptake by both species whether grown in perlite medium or on filter paper soaked with Pb (NO3)2, was correlated with lead concentration.
  • (12) Therefore, the maximum no-effect level is considered to be 1% in the diet which developed no toxic changes in any items examined in mice treated orally with perlite for 28 weeks.
  • (13) Chest roentgenograms of 240 perlite workers employed for 1 to 23 years in the industry, showed no evidence of pneumoconiosis associated with perlite exposures.
  • (14) The distribution of individuals with FVC below 80% of predicted also showed no association with duration of perlite exposure.
  • (15) Multiple regression analysis showed no significant association between years of employment in perlite and either forced vital capacity (FVC) or forced expiratory volume (FEV1).
  • (16) For researching the biosynthesis labelled Fusarin C(Fc) by Fuscarium moniliforme, a more quick and convenient method of Fusarin C production and purification were established, and a good liquid culture medium consisted of different kinds organic matters (hydroxy proline, sucrose and glycerin), inorganic salts and perlite replaced corn grit medium.

Words possibly related to "obsidian"

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