(n.) A nonmetallic element occurring naturally in large quantities, either combined as in the sulphides (as pyrites) and sulphates (as gypsum), or native in volcanic regions, in vast beds mixed with gypsum and various earthy materials, from which it is melted out. Symbol S. Atomic weight 32. The specific gravity of ordinary octohedral sulphur is 2.05; of prismatic sulphur, 1.96.
(n.) Any one of numerous species of yellow or orange butterflies of the subfamily Pierinae; as, the clouded sulphur (Eurymus, / Colias, philodice), which is the common yellow butterfly of the Eastern United States.
Example Sentences:
(1) That suggests they are being replenished by sulphur dioxide, most probably from volcanoes.
(2) Sulphuric acid fluorescence is used for quantitation and specificity is achieved by the addition of tritiated oestrone to the urine hydrolysate.
(3) Liver scintigraphy with 67-Ga citrate and alphafetoprotein (afp) determinations in the serum were carried out in 84 patients with liver mass lesions in the preceding sulphur colloid scans.
(4) The use of sulphur-containing amino acids and 2-deoxyglucose in growth media led to impaired cell wall synthesis and rendered cells very susceptible to treatment with mercapto-ethanol and various lytic enzymes.
(5) The molecular mass (5988 Da) of the native rubredoxin has been measured by electrospray-ionization m.s., thus establishing the applicability of the technique to this type of iron-sulphur protein.
(6) Attention is drawn to the shortcomings in our current knowledge of the scale of turnover of the sulphur cycle and of our understanding of the microorganisms involved in specialized environments.
(7) N-Methylformamide extracts of acid-treated precipitated VFe protein of the V-nitrogenase of Azotobacter chroococcum are yellow-brown in colour and contain vanadium, iron and acid-labile sulphur in the approximate proportions 1:6:5.
(8) Here we show that a farnesyl moiety is attached to a sulphur atom of the C-terminal cysteine of T gamma-2 (active form), a part of which is additionally methyl-esterified at the alpha-carboxyl group.
(9) Erabutoxin a was partially hydrolysed with enzymes and sulphuric acid and the resulting peptides were separated from each other by column chromatography and paper electrophoresis.
(10) NADH:ubiquinone reductase, the respiratory chain complex I of mitochondria, consists of some 25 nuclear-encoded and seven mitochondrially encoded subunits, and contains as redox groups one FMN, probably one internal ubiquinone and at least four iron-sulphur clusters.
(11) Bacteria of the genus Thiobacillus can obtain energy from the chemolithotrophic oxidation of inorganic sulphur and its compounds (sulphide, thiosulphate and polythionates) and use this energy to support autotrophic growth on carbon dioxide.
(12) Bacteriophage mu2 is inactivated by both mono- and di-functional sulphur mustards at relatively low extents of alkylation.
(13) The study of amino acid pattern shows that sulphur containing amino acids are limiting to almost the same degree in meat and meat soy blend.
(14) In a case in which ovarian biopsy at laparotomy revealed typical actinomycotic "sulphur granules" and Actinomyces israelii was diagnosed, standard Actinomyces israelii cytoplasmic antigens and circulating C1-binding immune complexes were found in the patient's serum when it was tested by counterimmunoelectrophoresis.
(15) Experiments were performed in a cylinder full of beads open at one end and closed at the other in which a mixture of oxygen with helium or argon or sulphur hexafluoride could diffuse with ambient air through the open end.
(16) The results obtained indicated that both the sulphydration and trans-sulphuration pathways were operating.
(17) This effect may add to other factors decreasing sulphur availability in critically ill patients, and simultaneous administration of thiosulphate is therefore recommended to ensure a safe SNP treatment during and after coronary bypass operations.
(18) (4) There is no specific therapy for poisoning by sulphur mustard.
(19) Among various acetylated proteins, proteins insoluble in 0.1m-sulphuric acid have the highest radioactivity.
(20) Desulfovibrio africanus ferredoxin III is a monomeric protein (Mr 6585) containing seven cysteine residues and 7-8 iron atoms and 6-8 atoms of acid-labile sulphur.
Vulcanize
Definition:
(v. t.) To change the properties of, as caoutchouc, or India rubber, by the process of vulcanization.
Example Sentences:
(1) Heat vulcanized Silastic 372 or 373 was used, and seems to be satisfactory.
(2) Accelerators, mainly of the thiuram group, antioxidants, vulcanizers, organic pigments, and, presumably, glove powder ingredients are known responsible allergens.
(3) Positive patch tests were found most frequently with antioxidants--16.6% (including IPPD--8.6%), followed by vulcanization accelerators--10.6%, and other rubber components--11.4% in all.
(4) We need to give them the space and freedom of Africa.” The unprecedented survey, carried out by Allen’s company Vulcan with £7m of funding, is the first continent-wide aerial survey of African elephants using standardised data collection and technical validation methods, involved more than 90 scientists, six NGOs and many volunteers and conservationists on the ground.
(5) Indomethacin was vulcanized in dimethylpolysiloxane, an inert silicone suitable for tissue implantation.
(6) The Vulcan, flown by the flight lieutenant who led the famous raid on Port Stanley's runway, twice passed over the memorial to commemorate those who fell during the south Atlantic campaign.
(7) The results indicate the usefulness of postmortem angiography with contrast medium vulcanizing at room temperature for postmortem diagnosis of rare causes of gastrointestinal haemorrhage.
(8) The most probable environment for the assembly of the various forms of protolife would be on mudbanks forming either at the mouth of streams draining regions of active vulcanicity, or round the edge of hot volclanic pools.
(9) They called themselves “ the Vulcans ”, not as a tribute to Spock, but to demonstrate they were as tough (or as Bush Sr might say, “iron-ass”) as the Roman god of fire.
(10) Primitive condoms were known as early as 1564, but it was not until the discovery of the vulcanization of rubber that the widespread production of condoms and diaphragms was feasible.
(11) CLF's laser, called Vulcan, is the most powerful laser in the world: it can focus 500 joules of energy (about the same required to lift 50 apples by 10m) into a laser burst just 40 femtoseconds (40 x 10-15) long - equivalent to one second in a million years.
(12) Air samples from the vulcanization process and the pressing of rubber goods showed BaP levels of up to 1.43 micrograms.m-3.
(13) The problem resulted from the physicochemical properties of the rubber, not the concentration of zinc used in the vulcanization process.
(14) We determined tissue tolerance to in situ vulcanizing silicone histologically in 30 rats by inserting prevulcanized and in situ vulcanized material in paired subcutaneous pockets.
(15) It was a lovely, short service and that Vulcan coming over was a wonderful ending."
(16) A histopathologic study was done on the larynx of a patient who had been injected 12 years before in the right vocal fold with room temperature vulcanizing silicone.
(17) During about 3 years of follow-up in 4 manufacturers contact allergic eczema was noted and polyvalent hypersensitivity to antioxidants and vulcanization accelerators without clinical manifestations of this hypersensitivity was diagnosed in 3 other subjects.
(18) A proved carcinogen, benzo[a]pyrene (BP), was incorporated into liquid silicone rubber polymer which was then vulcanized into solid form.
(19) Keen on photographing vintage aircraft, he was at Shoreham to capture one of the last flights of the Vulcan bomber.
(20) All the studied professional groups (assemblers, millers, vulcanizers) experienced a rise in osteomuscular morbidity and only vulcanizers had higher rates of respiratory, skin and subcutaneous diseases.