(a.) Pertaining to chemistry; characterized or produced by the forces and operations of chemistry; employed in the processes of chemistry; as, chemical changes; chemical combinations.
(n.) A substance used for producing a chemical effect; a reagent.
Example Sentences:
(1) Brain and ganglia of embryonic Periplaneta americana were grown for 2 to 3 weeks in a chemically defined medium.
(2) Stimulation of human leukocytes with various chemical mediators such as TPA, f-Met-Leu-Phe, LTB4, etc.
(3) This suggested that the chemical effects produced by shock waves were either absent or attenuated in the cells, or were inherently less toxic than those of ionizing irradiation.
(4) At 36 h postsurgery, RBCs were examined by 23Na-NMR by using dysprosium tripolyphosphate as a chemical shift reagent.
(5) The absorption of ingested Pb is modified by its chemical and physical form, by interaction with dietary minerals and lipids and by the nutritional status of the individual.
(6) Changes in cardiac adenosine triphosphate (ATP), phosphocreatine (PCr) and inorganic phosphate (Pi) were followed and intracellular pH (pHi) was estimated from the chemical shift of Pi.
(7) Maximal aberration yields were observed for 2,4-diaminotoluene, 2,6-diaminotoluene and cytosine beta-D-arabinofuranoside from 17 to 21 h, eugenol from 15 to 21 h, cadmium sulfate from 15 to 24 h and 2-aminobiphenyl, from 17 to 24 h. For adriamycin at 1 microM, the % aberrant cells remained elevated throughout the period from 9 to 29 h, while small increases at 0.1 microM ADR were found only at 13 and at 25 h. For most chemicals the maximal aberration yield occurred at a different time for each concentration tested.
(8) 2.39pm BST The European Union called for a "thorough and immediate" investigation of the alleged chemical attack.
(9) "With hyperspectral imaging, you can tell the chemical content of a cake just by taking a photo of it.
(10) The deactivated columns had the residual silanols on the silica gel chemically inactivated to reduce the interaction with basic groups or analytes.
(11) A sperm whale myoglobin gene containing multiple unique restriction sites has been constructed in pUC 18 by sequential assembly of chemically synthesized oligonucleotide fragments.
(12) On the basis of obtained data on the uniformity of chemical compounds of the secretion of glands belonging to different groups their common origin has been suggested.
(13) In spite of important differences in size, chemical composition, polymer density, and configuration, biological macromolecules indeed manifest some of the essential physical-chemical properties of gels.
(14) In contrast sham-hemodialysis in group CA and group PS, respectively, did not result in significant increases in amino acid efflux from the leg implying that the protein catabolic effect of blood membrane contact depends on the chemical properties of dialysis membranes.
(15) We investigated this suppression quantitatively, using a chemical assay for cell-bound and dissolved capsular polysaccharide.
(16) We previously established that the binding constant (Ka) of this receptor site for the chemically synthesized model AGE, 2-(2-furoyl)-4(5)-(2-furanyl)-1H- imidazole-butyric acid (FFI-BA), on cells of the mouse macrophagelike cell line RAW 264.7 is identical to that for AGE proteins.
(17) They included lectins such as wheat germ agglutinin (WGA), concanavalin A and phytohemagglutinin, and a chemical cross-linker, glutaraldehyde, in addition to anti-IL-2R monoclonal antibodies, HIEI and H-47.
(18) The reduction of such potentials can be explained in terms of collision between the antidromic volleys and those elicited orthodromically by chemical and thermic stimulation.
(19) In certain cases, the effects of these substances are enhanced, in others, they are inhibited by compounds that were isolated from natural sources or prepared by chemical synthesis.
(20) The use of gaseous insecticides in the chemical control of T. infestans is discussed.
Weathering
Definition:
(p. pr. & vb. n.) of Weather
(n.) The action of the elements on a rock in altering its color, texture, or composition, or in rounding off its edges.
Example Sentences:
(1) It was an artwork that fired the imaginations of 2 million visitors who played with, were provoked by and plunged themselves into the curious atmosphere of The Weather Project , with its swirling mist and gigantic mirrors that covered the hall's ceiling.
(2) Only "a tiny minority" of countries presently control space technologies, which play a major role in everything from broadcasting to weather forecasting, agriculture, health and environmental monitoring, the document notes.
(3) The loss of summer sea ice has led to unusual warming of the Arctic atmosphere, that in turn impacts weather patterns in the northern hemisphere , that can result in persistent extreme weather such as droughts, heatwaves and flooding," she said.
(4) The poor weather is coming at the worst possible time for retailers.
(5) Short of setting up a hotline to the Met Office – or, more prosaically, moving to a country where the weather best suits our condition, as Dawn Binks says several sufferers she knows have done – migraineurs can do little to ensure that the climate is kind to them.
(6) Dark Sky , for example, is a Kickstarter-funded iOS app that provides weather forecasting depending on your exact location.
(7) Talking ahead of a UN climate summit in Peru next month, Kim said he was alarmed by World Bank-commissioned research from the Potsdam Institute for Climate Impact Research in Germany, which said that as a result of past greenhouse gas emissions the world is condemned to unprecedented weather events.
(8) The sensitivity is, now that this is official, it will make things worse.” Like Australia, Canada weathered the financial crash of 2008 well, avoiding the banking crises suffered by the US, UK and the eurozone, instead growing fast on the back of exports of abundant natural resources.
(9) Weather data and breeding records for a Holstein herd of 1300 cows in Hawaii were evaluated to determine effects of climate on reproductive performance.
(10) But he added: “It’s also true that extremely low oil prices, adverse changes in currency rates, and a further decline in power prices are having a significant effect on our business.” Tony Cocker, the chief executive of E.ON UK, said milder weather and improved energy efficiency in British homes were behind the fall in power use, hitting sales.
(11) The integrated sensing system is an ideal instrumental set up for viewing and recording the behaviour of rodents as well as other animals in the experimental pen throughout the year under varying weather and light conditions.
(12) The weather forecast in Warsaw is for some showers on Wednesday, though Roy Hodgson has expressed concern over the time it will take to repair the surface, which was relaid only last week at a cost of £115,000 and was criticised after last Friday's friendly against South Africa.
(13) The disappointing weather at Easter left beaches deserted but some Britons, who were determined to enjoy the outdoors this time round, have already had their plans thwarted by the weather, taking to websites such as ukcampsite.co.uk to swap tales of woe, such as farmers calling to cancel bookings because sites were waterlogged.
(14) Photograph: Kevin Rushby Moving on, I pull in at Muizenberg as the bad weather starts to clear and the wide beach fills with people.
(15) A Department for Transport spokesman said the money was available now, adding that it was to deliver 10 projects along the western route, including works at Cowley Bridge in Exeter, which would improve the railway's ability to withstand extreme weather.
(16) On the basis the statistical method of Friedman's test it is concluded that there is a significant correlation (p less than 0.05) between the weather types and the daily number of births.
(17) TV's Jeremy Paxman didn't even bother hiding his disdain for the introduction of weather reports to Newsnight – "It's April.
(18) Acholeplasma laidlawii was frequently isolated from samples both from cows and from farm bulk tanks during wet, rainy weather in the spring of 1978, apparently as contaminants only.
(19) It is so sad, we don’t let her go out even if the weather is nice,” he says.
(20) This, Brown jokes, counts as good weather for Scotland.