(n.) An impure, massive, flintlike quartz or hornstone, of a dull color.
Example Sentences:
(1) Occurrence of well-preserved rod-shaped and coccoid bacteria in the Precambrian Gunflint chert (1.9 x 10(9) years old) has been demonstrated by electron microscopy.
(2) In order to evaluate the degree of morphological preservation of erythrocytes in bloodstains, an accidental human blood smear on white chert and several experimental bloodstains on hard substrates (the same stone-white chert; another type of stone-graywacke; a non-stone support-stainless steel), were stored in a room, in non-sterile and fluctuating conditions, for lengths of time ranging from 3 to 18 months.
(3) Large amounts of well preserved microfossils have been reported from the cherts of the Upper Proterozoic of the Bohemian Massif (Middle Europe).
(4) Two billion year old black chert lenses from the Duck Creek formation, northwestern Western Australia, contain abundant organically preserved microorganisms which are morphologically similar to fossils of approximately the same age from the Gunflint formation, Ontario.
Jasper
Definition:
(n.) An opaque, impure variety of quartz, of red, yellow, and other dull colors, breaking with a smooth surface. It admits of a high polish, and is used for vases, seals, snuff boxes, etc. When the colors are in stripes or bands, it is called striped / banded jasper. The Egyptian pebble is a brownish yellow jasper.
Example Sentences:
(1) The nucleotide sequence of genome segment A cDNA of the STC strain of infectious bursal disease virus (IBDV) was determined and compared with sequences of the homologous genome segment of the 002-73 strain of IBDV and the Jasper strain of infectious pancreatic necrosis virus (IPNV).
(2) Jaspers thus shows how, within the mind of every medical person, the researcher contests with the physician and the technician with the humanist.
(3) In the grounds of his house, Jasper Johns has a studio, a huge converted barn in which the 74 year old does most of his work.
(4) His invention of a new stoneware called Jasper has been described as the most important development in the history of ceramics since the Chinese discovery of porcelain nearly 1,000 years earlier.
(5) Jasper Cillessen, let it be noted, has never saved one in his career.
(6) The concept which makes a distinction between schizophrenic psychosis and manic-depressive psychosis grants the former a predominant position by applying Jasper's hierarchic rule: the presence of symptoms regarded as schizophrenic indubitably attributes the disorder to schizophrenia.
(7) Fewer infected sheep were observed annually when salt blocks were removed from Jasper National Park.
(8) Anglo-American psychiatry, in espousing Jaspers and rejecting psychoanalysis, has in consequence concentrated on the form and not the sense of delusions.
(9) Nucleic acid hybridizations using low stringency washing conditions and a synthetic DNA oligonucleotide probe (representing the 3' end of the A segment of the Jasper strain) gave positive results with the IPN virus Jasper, Ab, Sp, and N1 strains.
(10) To quote George Jasper Wherrett in The Miracle of the Empty Beds: One hundred years ago the word consumption (as tuberculosis was then called) struck horror in human hearts.
(11) The results of this investigation suggest that Jaspers' hierarchical principle, still important for many diagnostic systems, according to which the presence of delusions and hallucinations is considered to be pathognomonic for schizophrenia and takes priority over any affective ones, be abandoned.
(12) Lee Jasper has been at the centre of controversy because of his alleged involvement in the awarding of grants by the London Development Agency (LDA).
(13) The Ajax goalkeeper Jasper Cillessen, who was Van Gaal’s No1 when the coach led Holland at the World Cup, is a candidate to succeed De Gea.
(14) Prolonged isolated sialorrhea of epileptic origin was described by Penfield and Jasper (1954) in a patient with a lesional epilepsy.
(15) It means that his tactical hunches, l ike taking off Jasper Cillessen and putting Tim Krul in goal for the penalty shoot-out against Costa Rica , tend to come off.
(16) If De Gea does leave, the club have a plan in place, which could mean buying the Ajax goalkeeper Jasper Cillessen, who was Van Gaal’s No1 when the coach led Holland at the 2014 World Cup in Brazil.
(17) Lee Jasper, the former London mayoral adviser now involved in the Smiley Culture campaign, says he sees a number of parallels with 1981, including the loss of many experienced police – something highlighted by the Scarman report as a problem – job cuts, increased stop-and-search and high levels of black imprisonment.
(18) So argues Jasper Lawler of CMC Markets , who writes: The failure of the Pfizer-AstraZeneca deal has added to the bad feelings in markets today as a certain premium had been built into prices with the belief this mega-merger could bring about a new wave of M&A.
(19) Sigurdsson slap the penalty beyond Jasper Cillessen.
(20) Operation Indus hearings started and finished in November 2012 while Operation Jasper hearings also began in November 2012 but finished in March this year.