formaldehyde造句
121, A series of color test are carried out to determine the influence of developing result at different time after preparing the acetylacetone on formaldehyde content measuring.
122, The behavior of formaldehyde emission from medium density fiberboard ( MDF ) is a function of time elapsed.
123, In this paper, 2,2-dimethylolbutyraldehyde was synthesized through the acetal reaction of formaldehyde and butyraldehyde, using silicotungstic acid as catalyst.
124, A better method of decreasing free formaldehyde and free phenol during the synthesis of phenolic resol resin was investigated.
125, Objective To study the methods for determination of formaldehyde in rongalite.
126, The methods for preparing structural material bonding agent by condensing the alkaline lignin in the wast liquor of soda pulping process with formaldehyde and phenol are described.
127, The thermal decomposition kinetics of carbinol - formaldehyde polymers has been studied by non - isothermal thermogravimetry.
128, Elementary reaction pathways of the reductants such as dimethylamine borane, hypophosphite ion, formaldehyde, and titanium trichloride were quantitatively examined in terms of the heat of reaction.
129, The effects of the decomposition temperature of zeolite catalyst on the Brosted acidity of HZSM-5 and the conversion and selectivity of formaldehyde were investigated.
130, The principle and specific methods of determination of formaldehyde in beer using polarographic analysis are introduced.
131, Respectively using barium hydroxide and a basic anion exchanger as a catalyst, 2,2-bis(hydroxymethyl) butyraldehyde is prepared from the Aldol condensation of butyraldehyde with formaldehyde.
132, Conclusion Formaldehyde that injected into abdominal cavity reveals significant oxidation damage heart and brain of mice.
133, The boron-modified benzoxazine was synthesized by formaldehyde, phenol, boric acid and diamine.
134, By studying the catalyst, mole ratio of phenol to formaldehyde and reaction time etc. , introducing the synthesis procedure of high-ortho novolak resin.
135, The conventional method was by the condensation reaction of formaldehyde and polyvinyl alcohol.
136, Glycoluril prepared under optimized process conditions has the following good properties of low content of free formaldehyde, durable and stable and crease-proofing.
137, The urea-formaldehyde resin is formed by the reaction of urea, formaldehyde, aldehyde, one or more stabilizers and modifier according to the route of weak base-weak acid-weak base.
138, This paper also indicated that the yield of formaldehyde may be increased obviously by adding some water to methylal.
139, After Vladimir Lenin died in 1924, his brain was preserved in a formaldehyde solution.
140, You know, artificial boards are a source of the pollutant formaldehyde.
141, Limitations: If resins containing formaldehyde are used to control shrinkage, the product is unlikely to meet the Nike adult requirement of 75 ppm.
142, Microcapsules of pendimethalin with a urea - formaldehyde resin wall were prepared by anon - situ condensation polymerization aqueous medium.
143, To increase the U-F resin's curing speed and decrease the free formaldehyde, adopting two-times polymerize.
144, Methods The content of formaldehyde in rongalite was determined by sulfurous acid, magenta and acetylacetone spectrophotometry respectively.
145, Xylene was used to induce mouse ear swelling, formaldehyde was used to induce mouse foot swelling and ice-acetic acid was used to increase blood capillary leakage in mouse abdominal cavity.
146, Bronopol was synthesized from nitromethane and formaldehyde by hydroxyalkylation and bromination in the presence of alkali.
147, The possibility of preparation of methylal from methanol and formaldehyde through slurry catalytic distillation catalyzed by acidic cation exchange resin with large size pores is discussed.
148, Discomposes harmful gas quickly such as formaldehyde, benzene, ammonia and have no side effect.
149, Soybean flour was treated with 0.35% formaldehyde. The release rates of amino acids and ammonia from it were decreased in vitro.
150, The influences of preparation method, the calcined temperature and auxiliary forming reagent on the activity of the Fe Mo Co O catalyst for oxidation of methylal to formaldehyde were studied.
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