(n.) A nonmetallic element occurring abundantly in borax. It is reduced with difficulty to the free state, when it can be obtained in several different forms; viz., as a substance of a deep olive color, in a semimetallic form, and in colorless quadratic crystals similar to the diamond in hardness and other properties. It occurs in nature also in boracite, datolite, tourmaline, and some other minerals. Atomic weight 10.9. Symbol B.
Example Sentences:
(1) The compound caused extensive clumping, of cells, which appeared not to be related to the ability of boronates to esterify to diols.
(2) Examples are p-boronophenylalanine or boronated porphyrius.
(3) Fractions from the boronate gel column or aliquots of NaIO4-treated cell extract are quantitated directly by the RIA.
(4) The second part of the paper describes a case where neodynium-iron-boron magnets were used to assist eruption of an unerupted, vertically impacted upper right canine.
(5) A neodymium iron boron magnet is attached to the unerupted tooth, and a second, larger magnet is incorporated in a removable appliance.
(6) The various boron compounds being investigated for NCT are evaluated on the basis of necessary minimum boron content in tumor.
(7) N-Allylation of a trimethoxybenzazepine followed by cleavage of the methyl ethers with boron tribromide was the preferred method.
(8) Because boronated phenylalanine has been demonstrated to be preferentially taken up by melanoma cells through the biosynthetic pathway for melanin, there is special interest in a trial of boron neutron capture therapy for metastatic melanoma in brain.
(9) After separation by thin-layer chromatography, the bands of the lipid classes studied were scraped off, transmethylated according to the boron trifluoride-methanol procedure, and the fatty acid methyl esters were extracted and analysed.
(10) However, at 1000 and 2000 ppm boron, male fertility was significantly reduced.
(11) A parameter of major importance is the minimum concentration of boron needed in tumor in order to produce improved results in cancer therapy.
(12) Boron-11 spectral intensities decreased in the living rat over a 25-h period.
(13) In some areas, wastewater is used for irrigation and crops grown under these conditions are generally confined to those relatively insensitive to boron toxicity.
(14) These data indicate that broilers grown on boric acid-treated litter do not consume enough boric acid to cause elevated boron levels in tissues.
(15) In the course of re-assessment of boron-neutron capture therapy (BNCT) for malignant brain tumors, fractionation of neutron irradiation has been proposed.
(16) Six-day exposures of the differentiated cells to a 1-mM dose of aluminum or boron yielded increases in tau protein immunoreactivity to the monoclonal antibodies Tau-1 and Alz-50.
(17) Recovery of the serine and threonine derivatives was improved by substituting boron trifluoride-diethyl etherate for trifluoroacetic acid in the thiazolinone cleavage reactions.
(18) Boron levels in the brain dropped about 6%-8% and were more diffusely distributed on the images obtained 30 minutes after BSH infusion.
(19) The boron derivatives also caused L-1210 DNA strand scission.
(20) Glycosylation was estimated using boronate affinity chromatography with the myosin dissolved in a pyrophosphate buffer, the glycosylated myosin being displaced with sorbitol.
Boson
Definition:
(n.) See Boatswain.
Example Sentences:
(1) In the late 1970s the challenge was to discover the missing pieces of the Standard Model: the W and Z bosons (which carry the weak nuclear force), the top quark and the tau neutrino.
(2) A predecessor to the LHC, a machine called the Large Electron Positron collider at Cern , the particle physics laboratory near Geneva, ruled out the existence of the Higgs boson up to a mass of 114GeV, but saw what might have been hints of the particle before it shut down in 2000 to make way for the LHC.
(3) "There is no doubt that something very much like the Higgs boson has been discovered.
(4) For now, work centres on gathering more and more data from Higgs bosons inside the LHC.
(5) Evidence for the Higgs boson has risen sharply in the past seven months.
(6) Jim Baggott, author of Farewell to Reality: How Fairytale Physics Betrays the Search for Scientific Truth The discovery of the Higgs boson was a triumph for the standard model of particle physics.
(7) "I had a nightmare which is that Cern would discover the Higgs boson and then nothing else.
(8) The report suggests that "finding the Higgs boson, exactly as postulated in the Standard Model, would be a triumph.
(9) To spot the boson, the scientists have to look for unusual excesses of the particles it decays into, which appear as bumps in their data.
(10) The present one is nice and cosy, but it is embarrassing and sad to see many distinguished colleagues queueing up at five in the morning knowing that they have a slim chance to get a seat, after working for 20 years on finding the Higgs boson," said Dorigo.
(11) From previous work, the Higgs boson was thought to have a mass somewhere between 114 and 185GeV (gigaelectronvolts) – one GeV is roughly equivalent to the mass of a proton, a subatomic particle found in atomic nuclei.
(12) "It's going to be the Higgs boson of the brain, a Noah's archive of the mind," he says.
(13) For original approaches to outstanding problems in particle physics, including the proposal of large extra dimensions, new theories for the Higgs boson, novel realisations of supersymmetry, theories for dark matter, and the exploration of new mathematical structures in gauge theory scattering amplitudes.
(14) Ripples of excitement swept through the physics community last month when Cern scientists reported what looked like glimpses of the long-sought Higgs boson .
(15) That moment came today for physicists at Cern , near Geneva, home of the Large Hadron Collider, who announced overwhelming evidence for the obscure but profoundly important Higgs boson, the particle that sparked the greatest hunt in modern science.
(16) Without doubt, CERN has delivered us a new particle that looks every bit like the long-sought-after Higgs boson, which is absolutely central to our understanding of how the universe works at its most elemental level.
(17) These microscopic fireballs of energy condense into well known subatomic particles, but scientists hope that among them they will see other more exotic particles, including the Higgs boson .
(18) Following examples like the Human Genome Project and the Large Hadron Collider (where Higgs' elusive boson was finally discovered), the idea is that a large investment will deliver significant results.
(19) But the Standard Model of particle physics – of which the Higgs boson is part and which describes fundamental particles and forces of nature – hides a terrifying secret: a theoretical composite particle that is so stable it can transform any other particle of matter into a copy of itself.
(20) On Monday, scientists at the Tevatron, which was shut down by the US government last year , fired a parting shot, releasing a fresh analysis that showed their strongest evidence yet for the Higgs boson .