What's the difference between porites and pyrites?
Porites
Definition:
(n.) An important genus of reef-building corals having small twelve-rayed calicles, and a very porous coral. Some species are branched, others grow in large massive or globular forms.
Example Sentences:
(1) The material used for implantation was a hydroxylapatite replicate of coral from the genus Porites, with a pore size of 190 to 220 micron.
(2) Adult specimens of Astrangia danae (Agassiz) and settled planulae of Porites porites (Pallas) contain crystals averaging 0.7 mu by 0.1 mu by 0.3 mu within Golgi-derived vesicles.
(3) He said many of the huge porites corals, which could be a thousand years old, had died.
(4) Serologic tests showed more poritive CF tests to Histoplasma than to Blastomyces so that the test appears of no practical value.
(5) The authors studied the behaviour of the porite type coral which has been previously implanted in man in order to get a reparation of osseous and parodontal defects.
(6) Twenty two cranio-facial reconstructions were performed utilizing madreporic coral graft, genera porites.
(7) These pores measured 260-600 mu for CHA-Goniopora (CHAG), 190-230 microns for CHA-Porites (CHAP), and 100-300 microns for TCP.
(8) Porous hydroxyapatite (IP200), formed by conversion of the Poritidae porites exoskeleton, has pores averaging 230 microns and pore interconnections averaging 190 microns in diameter.
(9) Porous hydroxyapatite (Interpore 500) formed by conversion of the Porites goniopora coral exoskeleton has pores averaging 600 micrometers and pore interconnections averaging 260 micrometers in diameter.
(10) Studies were made on the frequency, the propagation velocity of the spike-bursts in the portions mentioned above, and the incidence of the spike-bursts which propagated from the distal porition of the interposed jejunal segment to the preserving pylorus, and from the preserving pylorus to the proximal portion of the duodenum.
(11) Porites corals can be centuries old and grow into 6m tall mounds.
(12) Since 1985, the authors have been using madreporic coral fragments (genera Porites) as a bone graft substitute.
(13) The objectives of this study were to compare the fate of two Madreporian corals, Porites and Acropora, after implantation during 1 and 2 months into sheep and pig long bones.
(14) "Our data shows that growth and calcification of massive Porites in the GBR [Great Barrier Reef] are already declining and are doing so at a rate unprecedented in coral records reaching back 400 years," wrote Dr Glenn De'ath from the Australian Institute of Marine Science in Townsville, Queensland, and his colleagues in the journal Science .
(15) A kind of coral, Porites, which was originated from the Madreporaria reef builders in Hainan Province, was studied as a bone substitute.
(16) The authors have used Porites coral as a bone substitute in more than 200 patients since 1985, initially for reconstruction after craniotomy or removal of graft from the iliac crest.
Pyrites
Definition:
(pl. ) of Pyrite
(n.) A name given to a number of metallic minerals, sulphides of iron, copper, cobalt, nickel, and tin, of a white or yellowish color.
Example Sentences:
(1) The ultrastructure of rabbit tracheal epithelium was studied 2, 8 and 26 hours after termination of 8-hour inhalation of ground pyrite dust.
(2) Evidence for the direct utilization of the sulphur moiety of pyrite by Thiobacillus ferrooxidans was derived from the following observations: a.
(3) An aerobic facultative thermophilic bacterium was isolated from the ore of the Nikolaev copper-zinc-pyrite deposit in the Eastern Kazakhstan.
(4) A research study was carried out at a pyrite mine in Niccioleta, southern Tuscany, during the period 1980-1983 to investigate the possible effects of gaseous and particulate pollutants on the respiratory function of mine workers.
(5) Wistar rats were injected intratracheally with pyrite particles and after 6 and 12 mo, lungs were evaluated for histological changes.
(6) Pyrite particles persist in the cytoplasm of ciliated cells throughout the interval followed up.
(7) It is proposed that the energy-transducing system of the first cellular organism and its precursor was fueled by the oxidation of hydrogen sulfide and ferric sulfide to iron pyrites and two [H+] on the outside surface of a vesicle (the cell membrane), with the concomitant reduction of CO or CO2 on the interior.
(8) A technique was developed for measuring (14)CO(2) uptake by chemolithotrophic bacteria directly in pyritic materials associated with coal and coal refuse.
(9) The cycle is catalytic for pyrite formation and autocatalytic for its own multiplication.
(10) The presence of high concentrations of sulfate, iron, and hydrogen (acid) ions in drainage from coal mines and other areas containing waste pyritic materials is a serious water pollution problem.
(11) The effect of pyrite added to the waste materials before the beginning of leaching has also been examined.
(12) The aforementioned importance is related to the ability of the bacterium to oxidize reduced iron and sulfur, principally found in nature as pyrite (FeS2).
(13) The morphogenesis of Sulfobacillus thermosulfidooxidans BKM B-1269 was studied by electron microscopy at the vegetative stage of growth on a medium with pyrite as the source of energy.
(14) Three species of thermophilic archaebacteria of the genera Sulfolobus (Sulfolobus acidocaldarius and S. solfataricus) and Acidianus (Acidianus brierleyi) were tested for their ability to oxidize pyrite and to grow autotrophically on pyrite, to explore their potential for use in coal desulfurization.
(15) These include: lack of controls while mining is underway; catastrophic events, such as the collapse of a settling dam, lack of site specific understanding of pyrite oxidation processes, particularly those that are biologically enhanced; the need for adequate biological information on which to base decisions to meet biological information on which to base decisions to meet biological objectives.
(16) Ferric, sulfate, and hydrogen ions are produced from pyritic minerals associated with coal as a result of autotrophic bacterial metabolism.
(17) A cohort mortality study was conducted with regard to a pyrite mine located in central Italy.
(18) They were skillful dental surgeons and made prostheses from jade and turquoise and filled teeth with iron pyrite.
(19) Only A. brierleyi was able to oxidize and grow autotrophically on pyrite.
(20) For instance, gold mining in South Africa’s Witwatersrand Basin – on which Johannesburg’s economy was founded – has left 120 mines’ worth of pyrite tailings, containing 450,000 tonnes of uranium.