查询词典 furan

Recently, we have detailed a new series of furan-containing teraryl cyclophene derivatives 40a-f and 67. And two keys to syntheses were one-pot furan annulation and the McMurry reaction.

过去我们已成功地利用呋喃成环反应，与McMurry反应合成到一系列的含呋喃之[n.2]环芃烯40a-f与环芃双烯67。

Rely on technical strength on the ground floor industry Furan decorated for the social and economic construction and development will make its own contribution to Furan

依靠技术实力在地坪行业中福冉装饰必将为社会经济建设发展做出自己的贡献、福冉

The changes of mechanical properties of furan resin mortar in two cases were studied. One case was the furan resin mortar was mixed with Durafiber of variable volume fractions.

研究了不同体积含量的杜拉纤维及同一体积含量的杜拉纤维经不同的硅烷偶联剂处理后掺入呋喃树脂砂浆中，其力学性能的变化。

The mechanism is applied to explain the exceptional high first hyperpolarizability of furan-containing [2.2]cyclophan-diene, which has centrosymmetric chromophores.

这机制被用来解释拥有中心对称发光团的 furan-containing [2，2]-cyclophandiene 具有异常高的一阶超极化率。

How to realizeprocess control of Furan resin-bonded sand self-curing technology has been briefly expounded combining practi- cal production with several sections such as raw material preparation, mixing sand, molding, coremaking,recla- mation and technological equipment design which have been depended upon to work out a series of document of techndogy and technique of furan resin-bonded sand self-curing process operational reules, technology regulations and acceptance standard of raw materials to play important role in guiding production on the spot.

本文结合生产实际情况，从原材料的准备、混砂、造型、制芯以及再生过程和工艺工装设计等几个方面，简要阐述了如何对呋喃树脂自硬砂生产工艺过程进行质量控制，并且在此基础上制订了工艺操作规程和工艺守则以及原材料验收标准等一系列有关树脂自硬砂的工艺技术性文件，对现场生产起了重要的指导作用。

How to realizeprocess control of Furan resin-bonded sand self-curing technology has been briefly expounded combining practi- cal production with several sections such as raw material preparation, mixing sand, molding, coremaking,recla- mation and technological equipment design which have been depended upon to work out a series of document of techndogy and technique of furan resin-bonded sand self-curing process operational reules, technology regulations and acceptance standard of raw materials to pl...

呋喃树脂自硬砂；生产工艺过程；质量控制；本文结合生产实际情况，从原材料的准备、混砂、造型、制芯以及再生过程和工艺工装设计等几个方面，简要阐述了如何对呋喃树脂自硬砂生产工艺过程进行质量控制，并且在此基础上制订了工艺操作规程和工艺守则以及原材料验收标准等一系列有关树脂自硬砂的工艺技术性文件，对现场生产起了重要的指导作用。

Under the optimal reaction conditions of 0.5MPa pressure, at 150℃, H2 gas flow rate of 5000 mLh^(-1) and liquid flow rate of 5.0mLh^(-1), the conversion of furoic acid, selectivity to methyl tetra-hydro-furan formiate and yield of methyl tetra-hydro-furan formiate can reach 99.0%, 98.2% and 97.2%, respectively.

结果表明：在0.5MPa，150℃，氢气流速5000mLh^(-1)，液体流速5.0mLh^(-1)（氢油比为50）时，呋喃甲酸转化率为99.0%，四氢糠酸甲酯的选择性98.2%，产率97.2%。

The substituents on 2 and 4 position of furan ring were derived from the propargylic part of homopropargylic alcohol, and the substituent on 5 position of furan ring was derived from the

其呋喃环上2号及4号位置的取代基乃源自於高炔丙基醇之炔丙基，5号位置的取代基乃源自於醇之偕位，故藉此方法合成之碘化呋喃化合物具有高度的位向选择性。

Using MA as raw material, Xuzhou Chemical and Medicine Industrial Corporation is to produce 20,000-tonne 1-4 butanediol and 4,000-tonne tetrahydro furan per year.

1.4丁二醇联产四氢呋喃工程1-4 Butanediol and Tetrahydro Furan Production 徐州市化学医药工业公司拟以顺酐为原料，采用顺酐法低压加氢工艺，建设年产2万吨1.4丁二醇，联产4000吨四氢呋喃生产线。

As far as these organic matters are concerned, there are as much sixteen kinds of low molecular weight organic acids and Aldehyde, Alcohol, Ketone, Carboxylic acid, Carboxylic acid, Furan, Pyrazine, Fat hydrocarbon, sulphide and so on. The results have also shown that the content of Aldehyde, Alcohol, Fat hydrocarbon, Carboxylic acid, Furan, Pyrazine, sulphide in composted production amended with NMF inoculants increased 6.5%、9.2%、5.7%、15.6%、9.8%、11.3% and 28.6%, respectively.

研究证实添加微生物腐熟菌剂的奶牛粪堆肥产品中醛类、醇类、酯类、羧酸类、呋喃类、吡啶类和含硫类等低分子有机化合物的相对含量比未添加NMF微生物腐熟菌剂分别增加6.5%、9.2%、5.7%、15.6%、9.8%、11.3%和28.6%，而酮类、脂肪族碳氢化合物的相对含量则分别减少11.4%和15.5%。

The absorption and distribution of chromium were studied in ryeusing nutrient culture technique and pot experiment.

采用不同浓度K2CrO4(0，0.4，0.8和1.2 mmol/L)的Hoagland营养液处理黑麦幼苗，测定铬在黑麦体内的亚细胞分布、铬化学形态及不同部位的积累。

By analyzing theory foundation of mathematical morphology in the digital image processing, researching morphology arithmetic of the binary Image, discussing two basic forms for the least structure element: dilation and erosion.

通过分析数学形态学在图像中的理论基础，研究二值图像的形态分析算法，探讨最小结构元素的两种基本形态：膨胀和腐蚀；分析了数学形态学复杂算法的基本原理，把数学形态学的部分并行处理理念引入到家实际应用中。