in the presence of造句
(91) The results showed, in the presence of sodium hydroxide, 4-aminoazobenzene could react with fresh sodium dithionite solution, and broke the carbon - carbon double bond of 4-aminoazobenzene.
(92) In the presence of external sources, a superconducting weak link can be represented by a simplified model, consisting of a resistively shunted Josephson junction driven by a current source.
(93) The boron compound and iodine source are combined with reactants of a fluoroalcohol and an alkylene oxide in the presence of a base.
(94) Determination of high assay phosphorus in ores is studied in the presence of tartaric acid with the volumetry of ammonium molybdophosphate.
(95) The regioselective nitration of toluene and chlorobenzene with nitrates and supported nitrates on solid acid catalysts and supports in the presence of acetic anhydride is studied.
(96) Isopentyl lactate was synthesis from acid and isopentyl alcohol in the presence of ferric chloride hexahydrate.
(97) The process comprises the following steps: dehydrofluorinating 3-chloro-1,1,1,3-tetrafluoropropane under conditions sufficient to effect dehydrofluorination in the presence of a catalyst.
(98) A number of diseases can result in the presence of opacities that appear predominantly centrilobular on HRCT.
(99) The activity could be restored by incubation of depleted SCR with phospholipid in the presence of ubiquinone Q2.
(100) Studied a unified methodology for real-time speed control of a brushless direct-current motor drive system in the presence of measurement noise and load torque disturbance.
(101) Ascorbic acid could function as a prooxidant, rather than an antioxidant, in the presence of hemin.
(102) Using single genes as phylogenetic markers, it is difficult to trace organismal phylogeny in the presence of HGT .
(103) The reactions of thiazole ethiodide with aromatic aldehydes in the presence of pipcridine as catalyst were investigated. It is found that the reaction is of second order.
(104) Starch yields a blue color in the presence of iodine.
(105) Then, under microwave irradiation, the hydrazide was refluxed with carbon disulfide in the presence of potassium hydroxide to yield target compound 5-dehydroabietyl-1,3,4-oxadiazole-2-thiol.
(106) Polyethylene glycol monomethyl ether(PGME) fatty arid esters were Preped fain methyl fatty acid ester and PGME in the presence of sodium methoxide as catalyst.
(107) Lawrence of Arabia on the Wadi Rum desert: "Our little caravan grew self-conscious, and fell dead quiet, afraid and ashamed to flaunt its smallness in the presence of the stupendous hills."
(108) Organisms possessing this enzyme, in the presence of atmospheric oxygen and the substrate contained in the oxidase discs give a red-fuchsia color.
(109) The safflower oil unsaturated monoglycerid ester was synthesized with glycerin and xinjiang local safflower oil in the presence of the sodium catalyst.
(110) Using glycerine and acetic acid as raw materials and in the presence of catalyst, glycerin triacetate was synthesized through esterification, dehydration and underpressrue distillation.
(111) Dr Graziella Magherini, author of The Stendhal Syndrome, has studied more than 100 tourists in Florence, Italy, who became ill in the presence of great works of art.
(112) Extract Leach resin can effectively adsorb gold in the presence of acidic medium and can easily desorb gold with thiourea. Such kind resin can be regenerated for reuse.
(113) Dibenzyl phosphite was synthesized by benzyl alcohol and trichlorophosphorous in the presence of pyridine.
(114) The reaction of fluoroalkyl iodides with ethyl vinyl ether and amines in the presence of sodium dithionite was studied.
(115) In the presence of cellobiose, CDH could reduce many oxidized products catalyzed by soybean hull peroxidase (SHP).
(116) Ddaps deoxypentose and protein amino acid in the presence of similar, asas acid - base and alkalescence base.
(117) The invention also envisages a method for the preparation of a coloured polymer, the method comprising performing a polymerisation reaction in the presence of such a catalyst.
(118) In the presence of Dragon's Blood, the action potential amplitude of the bullfrog sciatic nerve was decreased, the conduction velocity was slowered and the refractory period was delayed.
(119) The results show that reflection from rough sea surface is an important factor in calculating propagation loss over rough sea and a knife-edge in the presence of rough sea surface.
(120) Some chemicals are flammable - ie . they burn in the presence of air.
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