(n.) A massive, somewhat impure variety of quartz, in color usually of a gray to brown or nearly black, breaking with a conchoidal fracture and sharp edge. It is very hard, and strikes fire with steel.
(n.) A piece of flint for striking fire; -- formerly much used, esp. in the hammers of gun locks.
(n.) Anything extremely hard, unimpressible, and unyielding, like flint.
Example Sentences:
(1) Caroline Flint, a Labour MP and former cabinet minister, called for all corporate tax affairs to be made public.
(2) These data imply that Silvadene controls S aureus-generated burn wound infections better than the Flint product.
(3) HSBC’s shares have been on a rollercoaster ride since Gulliver and departing chairman Douglas Flint took charge six years ago, and are little changed from where they started out.
(4) Retreating to your lab and hoping it will all go away is not going to be the best strategy Andrew Rosenberg, National Oceanic and Atmospheric Administration In March, Bill Nye , the bow-tied embodiment of science for many Americans, and Mona Hanna-Attisha, a pediatrician who alerted the world to soaring levels of lead in the blood of children in Flint, Michigan, were named as honorary co-chairs.
(5) Caroline Flint, Labour's spokesperson for energy and climate change, said the Ofgem report showed why a price freeze is needed: "Labour's price freeze will save money for 27 million households and 2.4 million businesses and our plans to reset the market will deliver fairer prices in the future.
(6) 'Archaeology on steroids': huge ritual arena discovered near Stonehenge Read more Archaeologists have found evidence that a big tree fell over and its base provided a wall which was then lined with flint.
(7) Flint became the first Home Office minister to admit that she tried smoking dope while a student in the 80s, a fact she revealed when pushing reclassification of cannabis through the Commons.
(8) A 17-day, in situ, biomonitoring study using caged, juvenile channel catfish (Ictalurus punctatus) was conducted at five sites along a 9-km section of the Flint River at the Anthony Ragnone Wastewater Treatment Plant near Montrose, Michigan.
(9) Flint walked out in protest at not being offered a full cabinet post.
(10) He said Douglas Flint, chairman of HSBC, and Lord Blackwell, the new chairman of Lloyds Banking Group, would agree with his view that chairing a bank was a full-time role.
(11) But Brown says he worked "very, very closely" with Flint when she was housing minister.
(12) Figures close to Brown were irritated that Flint was finding time to pose for the cameras while they felt she had yet to master the highly intricate details of her brief as Europe minister.
(13) The people of the New England electorate, with Barnaby Joyce as their MP, had thought he would be able to protect the Liverpool Plains for them,” Lock the Gate Alliance spokeswoman Carmel Flint told reporters.
(14) Tempers frayed at the last debate in Flint, Michigan, at the weekend, when Clinton accused Sanders of voting against the auto industry bailout – a charge he vehemently denies and that appears not to have swayed voters at the centre of the US car industry.
(15) A controversy exists with regard to the relative efficacy of two preparations of silver sulfadiazine (AgSD), Silvadene and Flint's Silver Sulfadiazine Cream.
(16) When asked about this, Flint said: “Nobody wants to push the button.
(17) Caroline Flint, shadow energy and climate change secretary, said the referral underlined why her party was committed to breaking up the big six and freezing energy bills till 2017, should it win power in elections next year.
(18) Flint said five months was too long to wait; a new leader would boost Labour in the polls and attract new funding from supporters.
(19) The water crisis in Flint is a sobering reminder of America’s long history of disregard when it comes to the welfare of black bodies – I am not the first to note how eerily reminiscent it is of the Tuskegee Experiment in the 1970s, when hundreds of black men with syphilis were not told they had the disease so that US Public Health Services could study its progression.
(20) Flint said the public was fed up with hearing the "same old excuses" from the energy industry.
Silica
Definition:
(n.) Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
Example Sentences:
(1) We have previously shown that intratracheally instilled silica (quartz) produces both morphologic evidence of emphysema and small-airway changes, and functional evidence of airflow obstruction.
(2) In the German Democratic Republic, patients with scleroderma and history of long term silica exposure are recognized as patients with occupational disease even though pneumoconiosis is not clearly demonstrated on X-ray film.
(3) Human gingival fibroblasts were allowed to attach and spread on bio-glasses for 1-72 h. Unreactive silica glass and cell culture polystyrene served as controls.
(4) The ADAM derivative of carnitine was separated from decomposition products of the reagent and related compounds such as amino acid derivatives on a silica gel column eluted with methanol-5% aqueous SDS-phosphoric acid (990:10:1).
(5) The deactivated columns had the residual silanols on the silica gel chemically inactivated to reduce the interaction with basic groups or analytes.
(6) We have investigated some of the factors which affect the retention times of these substances in reversed-phase HPLC on columns of 5-micron octadecylsilyl silica.
(7) The corresponding hydrides, mono-n-butyltin hydride, di-n-butyltin hydride, tri-n-butyltin hydride, monophenyltin hydride, diphenyltin hydride triphenyltin hydride, are detected by electron-capture gas chromatography after clean-up by silica gel column chromatography.
(8) The length of the hydrocarbon chains of the surface-modified silica supports had no significant influence on the selectivity.
(9) A novel type of ion exchanger was prepared by multipoint covalent binding of polystyrene chains onto the surface of porous silica followed by polymer-analogous modification of the bonded layer.
(10) The analytes were rapidly separated on an affinity column packed with phenylboronate-bonded silica.
(11) Using thin layer chromatography on fluorescent silica gel plates, 5 indoles were identified and 6 unknown substances isolated from the pineal incubate and from both extracts.
(12) Our results clearly demonstrate that capillary GC analysis of amino acids using fused silica bonded-phase columns provides data with good precision and in general excellent agreement with ion-exchange analyses.
(13) Free haem itself was bound to the silica column but could be released by globin.
(14) The methanol-ammonia (20:1) and chloroform-methanol-ammonia (2:2:1) systems, used with silica-gel plates, are the most promising for rapid preliminary screening of tuna fish extracts for histamine.
(15) The presence of Ca2+ in silica gel is responsible for this improved yield of prostaglandin as the divalent metal ion stabilized prostaglandin synthetase activity in a remarkable way.
(16) Silica accumulated linearly in the mediastinal lymph nodes and thymus for several months after cessation of exposure, while negligible amounts were found in kidney, spleen, liver, and blood.
(17) Methods employing electroosmotic flow in an untreated silica capillary were found to provide, at best, only partial resolution of the 23 fragments in a 1-kbp DNA ladder.
(18) The galactose lipid was isolated by column chromatography on DEAE-cellulose and silica gel.
(19) Adsorption experiments were performed by combining virus and silica in 0.1-ionic-strength buffers of pH 4.0, 6.4, and 8.5.
(20) The extracts are analyzed via a gas chromatograph equipped with a DB-1301 widebore fused-silica capillary column and an electron capture detector.