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condensation造句
271. The utility model relates to a condenser for a refrigerator, which is formed by the winding of a condensation tube and the condensation tube is provided with inner threads. 272. Condensation reaction of piperazine is a very important step in the process synthesis of ciprofloxacin. 273. The first polyimide polymer is prepared with aromatic fluoric diamine and aromatic tetracid dihydride and through a two-step condensation reaction in organic solvent and under the action of catalyst. 274. The type of traps can maximize the use of condensation water was hot or prevent product overheating. 275. It is a widespread difficulty to prevent the corrosion which happen in the condensation water pipes of a district steam heating system. 276. Tinoridine hydrochloride was synthesized from benzylamine by condensation, cyclization, decarboxylation, cyclization and then salt formation in an overall yield of 55.2%. 277. METHODS Balsalazide disodium was synthesized by reactions of condensation , reduction, diazotization , coupling and salification from 4-nitrobenzoyl chloride. 278. Results show that the thermal comfort of combined system is the best, and the risk of condensation is lower than that when chilled ceiling panel operates individually. 279. METHODS The compound was synthesize by steps of reduction, condensation and cyclic condensation from 1,2-dicyanocyclobutane. 280. Amyl cinnamaldehyde was synthesized from benzaldehyde and n-heptanal by aldol condensation with catalyst potassium hydroxide in solvent ethylene glycol. 281. Methods: Suberic acid was selected as the start material, and the SAHA was obtained through condensation, activation and ammoniated. 282. Some problems about the intersection condensation of aldol in the present textbook of organic Chemical Experiment are pointed out. Mean while some improved are presented. 283. Mesocarbon microbeads ( MCMB ) were prepared from coal tar pitch containing original QI by thermal condensation. 284. The latent heat of condensation and the water vapor don't play decisive roles in formation of the vortex, but play key roles in vortex maintenance and structure characteristics evolvement. 285. Ingredient: Bolivian uric acid, white feather fan bean, condensation ultramicro granule, breast wooden fruit extraction. 286. The heat of condensation is equal to the heat of vaporization. 287. Many researches showed that, the coalescence is the main reason to speed up the movement of drops on the surface with gradient surface energy and separate from the surface in dropwise condensation. 288. The condensation of carbamates with aldehydes under the catalyzing of acids affords alkylene dicarbamate or monocarbamate in good yields. 289. The condensation source of the modern cryopump is a mini refrigerator. 290. The constraint equation of the dynamic condensation matrix, which relates the deformations of the master and slave degrees of freedom, is directly derived from the original eigen equation at first. 291. Methyl dihydrojasmonate was synthesized from 2 pentyl 2 cyclopentanone and methyl malonate by condensation and decarboxylation. 292. Vitreous changes were cardinal findings. Vitreous cells were noted in 27(77%) eyes, snowball in 15(43%) and retrolental condensation in 7(20%). Snowbank was found in only 1(3%) eye. 293. The characteristics of the condensation between cyclopentanone and n-valeraldehyde in different catalytic systems were studied. 294. Other polymers, such as those made by step growth polymerisation may be more easily depolymerised. by undoing the condensation or elimination reaction that caused the monomer units to join. 295. Film condensation heat transfer characteristics are studied by numerical simulation for a single horizontal tube in the presence of a non condensable gas. 296. METHOD The objective compound was synthesized by steps of ring-opening, condensation, hydrazinolysis and hydrolysis, starting from phthalic anhydride. 297. The results of the tests indicate that the layout scheme, steam condensation load and pressure are major influencing factors for maintaining a sustained dropwise condensation.