(n.) Pure silica, like quartz, but crystallizing in hexagonal tables. It is found in trachyte and similar rocks.
Example Sentences:
(1) The crystals with more irregular surfaces and protruding oxygen atoms, which form surface pockets (quartz, tridymite, and cristobalite), showed a dramatic increase over saline controls for lung index (greater than 2 x), cell number and lavage protein concentration (greater than 4 x), and hydroxyproline level (greater than 2 x).
(2) Kieselguhr is a greyish-white powder which is made by heating lake ooze containing diatom skeletons to a temperature of about 1000 degrees C. It contains quartz, cristobalite and tridymite.
(3) Since crystalline silica is present in the occupational environment, the airborne dust content of various polymorphs of silica, especially quartz, cristobalite and tridymite, was determined by X-ray diffraction analysis.
(4) Complementary experiments with tridymite filtrates suggested that phagocytosis of tridymite particles by monocytes was a necessary step for the induction of SCEs in human lymphocytes.
(5) The crystals studied were quartz, tridymite, cristobalite, coesite, anatase, and rutile.
(6) As evidenced by IR spectroscopy, super microhardness of CGC, observed in practice, appears to be related to their higher solidity in contrast to that of Gamma porcelain, structurally similar to amorphous silica, and that of Sikor characterized by a poorly crystallized tridymite structure.
(7) The abilities of Min U Sil quartz or tridymite particles to induce sister chromatid exchanges (SCEs) in cultures of human lymphocytes plus monocytes or of human purified lymphocytes were investigated.
Volcanic
Definition:
(a.) Of or pertaining to a volcano or volcanoes; as, volcanic heat.
(a.) Produced by a volcano, or, more generally, by igneous agencies; as, volcanic tufa.
(a.) Changed or affected by the heat of a volcano.
Example Sentences:
(1) But volcanic liberation has never really been his bag.
(2) Future ice loss and bending of the crust due to rising sea levels have the potential ultimately to raise levels of both earthquake and volcanic activity.
(3) He was a prowling, volcanic presence on the touchline.
(4) The Texas senator Ted Cruz says the rise of Donald Trump makes him “very optimistic” the next occupant of the White House will be a conservative – perhaps himself – propelled there by the “volcanic rage” of voters.
(5) In summary, volcanic ash alone or in combination with SO2 had only minimal effects on certain host defense mechanisms.
(6) Facebook Twitter Pinterest The landscape near San José I had started with a night in Rodalquilar, a white-washed village inside a large volcanic crater.
(7) If you only have an 20cm tin you can use that instead, but don't use all the batter – about 80% will suffice – otherwise you'll end up with a volcanic overspill, cake soldered to the floor of the oven and a frayed temper.
(8) Even by Congolese standards, Goma has endured much in its history , from mass looting by the army to the arrival of a million Rwandan Hutu refugees, years of cross-border wars and, in 2002, a volcanic eruption that poured a tide of lava through its heart.
(9) She writes about the nightmarish scenarios surrounding geoengineering, or hacking the planet, by spraying seawater into the sky to create cloud cover, or simulating a volcanic eruption to fill the lower atmosphere with ash.
(10) The telescope, which is perched on the summit of Mauna Kea, a volcanic island in Hawaii, picked up signs of methane in the planet's atmosphere that could not be seen by either Hubble or Spitzer .
(11) A thermoacidophilic micro-organism, isolated from volcanic hot springs near Naples, was cultivated in vitro, and examined by electron microscopy in sections and after negative staining.
(12) Festivalgoers in Edinburgh will witness the city’s birth from volcanic eruptions and the crushing force ice in a late-night spectacular that will open this year’s events.
(13) Triassic-Jurassic, c 200 million years ago Three-quarters of species were lost, again most likely due to another huge outburst of volcanism.
(14) But to do Hakone justice, find a reasonably priced ryokan and take a couple of days to explore the volcanic geysers of Owakudani, the botanical gardens, the cherry blossom in spring and Hakone shrine on the shore of the lake.
(15) Following the 1980 Mount St. Helens volcanic eruption, psychiatric reactions were studied in the disaster area and in a control community.
(16) A thousand years ago, it was responsible for one of the largest volcanic eruptions in human history.
(17) Edinburgh’s skyline is dominated by Castle Rock, Calton Hill nearby, the dramatic volcanic remnants of Arthur’s Seat and the cliffs of Salisbury Crags , but festival events rarely focus on the city’s geological history.
(18) Lake Nyos sits in a crater on the edge of an inactive volcano in the Oku volcanic field.
(19) Costs of the disruption to the global airline industry caused by the volcanic ash cloud have spiralled to $1.7bn (£1.1bn), according to new estimates today from the International Air Transport Association (Iata).
(20) On her newest album Haze recalls discovering rap as an outlet: " I was nothing Then all of a sudden I'm a volcanic eruption. "