查询词典 formaldehyde

This study did not use formaldehyde, but instead of the xylene—formaldehyde resin as an acetal reagent.

一、前言酚醛树脂是最古老的合成树脂之一，其性能，例如瞬时耐高温性能是其他合成树脂所不及的，因而得到广泛应用。

The indoor air pollution of benzene series and formaldehyde is popular after decoration, especially that of formaldehyde.

室内装修空气污染普遍存在。

The paper surveyed the natural contents of formaldehyde in common aquatic products and conducted a risk assessment on it by the method of CAC. The results showed that the content of formaldehyde in most aquatic products was low, apart from Bombay duck and shredded squid.

为了查明水产品中天然甲醛的含量水平及其对人体的健康风险，研究了常见水产品中的甲醛天然含量，参照CAC的方法对其进行了健康风险评估。

Cashew shell oil - phenol - formaldehyde resin, synthesized with condensation polymerization of industrial cashew nut shell liquid and formaldehyde possesses good property - price ratio for paint application.

采用工业腰果壳液和甲醛缩聚反应合成具有良好性价比的腰果酚甲醛树脂，并以此配制了腰果树脂漆。

Compared sterilization only under the microwave irradiation with that only with formaldehyde, the remaining colon bacillus is monitored. It is proved that the microwave can work in coordination with formaldehyde for sterilization.

只用微波辐照或只用甲醛消毒和在微波辐照下甲醛消毒的对照实验中，通过考察残余大肠杆菌量，证明了微波对甲醛消毒有协同作用。

The flame retarding mechanism of MCA on POM was that formaldehyde and formate acid were absorbed by melamine resulting from melamine cyanurate pyrolysis and temperature of burning materials was reduced because melamine cyanurate sublimation absorbed heat and thermalplastic polyurethane absorbed formaldehyde and enhanced stability of POM composites.

热失重、红外和气质联用分析表明，MCA／TPU复合阻燃剂对聚甲醛的阻燃作用是由于三聚氰胺氰尿酸盐高温分解并吸热，降低材料燃烧区域的温度；另一方面MCA高温分解生成的三聚氰胺可吸收聚甲醛分解产生的甲醛和甲酸；此外，TPU可提高聚阻燃甲醛的热稳定性，有利于阻燃。

Main connections are methenyl ether linkage and methenyl. From the end of heat preservation to the end of whole reaction, main reaction was polycondensation. In general, there were three types reaction among melamine modified UF resin, urea-formaldehyde system, melamine-formaldehyde system and melamine-urea-formaldehyde system.

保温反应结束直到整个反应结束，缩聚反应为主要反应类型，三聚氰胺改性脲醛树脂中存在着3种反应体系：尿素甲醛的反应体系、三聚氰胺甲醛反应体系和三聚氰铵尿素甲醛共缩合反应体系。

Methods: in the light of the introduction of national standards "The analytical methods of zymolytic alcohol healthful standard" measured formaldehyde content of the food; and according as the national standard methods of measuring sulfur dioxide content of the food to determine food formaldehyde or sodium formaldehyde sulfoxylate content.

参照采用国家标准《发酵酒卫生标准的分析方法》，测定食品中甲醛的含量；再按国家标准方法测定食品中二氧化硫的含量，以判断食品中甲醛或吊白块的含量。

An anionic phenol-formaldehyde resin which synthesized by phenol, formaldehyde and diethylene triamine was studied in this paper, and this modified phenol-formaldehyde resin was used in papermaking as an intensifier.

结果表明，单独使用改性酚醛树脂时增强效果不显著；改性酚醛树脂和阳离子淀粉共同使用能有效提高纸张的抗张指数和环压指数。

The radiation by non-thermal plasma can accelerate formaldehyde thansform and make an increase of 29.61% in depurated efficiency. The surface modification makes no obvious difference in depurated efficiency. The chemical modification avails formaldehyde reduction and ACF coated with nano- TiO2 is the best of all that can enhand the depurated efficiency to 94%. The great influence of parameters on depurated efficiency , such as applied voltage and reaction time , shows that an increase in either applied voltage or reaction time enhance formaldehyde conversion.

研究结果表明：低温等离子体辐射能促进甲醛净化，可使其净化效率提高29.61%；表面改性对净化效率没有明显影响；化学改性有利于甲醛净化，其中负载纳米TiO2改性方案最佳，其净化效率高达94%；电源电压和反应时间等参数对净化效率也有较大影响，电压越大，时间越长就越有利于甲醛的去除。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。