石烯醇 的英文怎麼說
中文拼音 [dànxīchún]
石烯醇
英文
stenol-
Fifty - one and nineteen compounds were detected respectively from the volatile extracts of the fossils from miocene leaves of metasequoia glyptostroboides and early cretaceous seed cone of pityostrobus spp. by gas chromatography - mass spectrometry ( gc - ms ) analysis
摘要採用氣相色譜質譜聯用分析技術從中新世水杉葉片和白堊紀松型球果兩種裸子植物化石中分別鑒定了51個和19個揮發性成分,類型涉及烷烴、烷烯、烷醇、長鏈脂肪酸及其酯、鄰苯二甲酸酯、菇類和芳香族化合物。In order to solve the problems with heavy turpentine, such as complex constituents, vicinal boiling point, difficult to separation and hard to comprehensive utilization, the - santalene was converted to natural structure similar product - santalol by light - oxidize reaction, and caryophyllene epoxide was obtained at the same time
摘要為了解決重質松節油組成復雜、沸點相近導致分離困難、難以深加工綜合利用等問題,利用光氧化反應技術,將其中的-檀香烯轉化為與天然-檀香醇結構相似的檀香型新香料-檀香烯醇,同時可得到環氧石竹烯。Current status and prospect of industrial production of vinyl acetate by synthesis method from calcium carbide - acetylene
電石乙炔法工業生產聚乙烯醇的現狀與展望The experimental results indicate that gypsum is the key influencial factor on the density of the products ; polyvinyl alcohol can improve the product ' s surface quality and reduce its deformation ; meanwhile, the interaction between white carbon black and polyvinyl alcohol has some influence on the density and deformation of the product
結果表明,粉末中石膏含量是影響製件密度的關鍵因素,而聚乙烯醇則可以顯著提高製件的表面質量,減小尺寸變形量,白碳黑和聚乙烯醇的交互作用對製件密度和尺寸變形量也有一定的影響。The dispersity and stability of the graphite aqueous suspensions was investigated with centrifugation, the violet visible spectrophotometer, the laser particle size analyzer and scanning electron microscopy ( sem ). the following aspects of the production technique were carefully studied : 1. the effects of surfactants, poly ( vinyl alcohol ) ( pva ), poly ( vinyl pyrrolidone ) ( pvp ), sodium alginate ( sa - na ) and poly ( sodium acrylate ) ( pa - na ) on the suspension stability of graphite were investigated
本研究的主要內容有以下三個方面: 1 、研究了陰離子表面活性劑、非離子表面活性劑、聚乙烯醇( pva ) 、聚乙烯基吡咯烷酮( pvp ) 、海藻酸鈉( sa - na ) 、聚丙烯酸鈉( pa - na )對石墨在水中分散性和穩定性的影響; 2 、研究了分散方法、分散介質、 ph值及羧甲基纖維素鈉( cmc )含量對石墨在水中分散性和穩定性的影響; 3 、研究了聚乙烯醇( pva ) 、聚乙烯基吡咯烷酮( pvp ) 、海藻酸鈉( sa - na ) 、聚丙烯酸鈉( pa - na )四種助分散劑與羧甲基纖維素鈉( cmc )復配對石墨在水中分散性和穩定性的影響。Widely applied in the drying process of natural gas and petroleum gas, especially the advanced drying of gases like petroleum pyrolysis gas, ethylene, propylene, butadiene and acetylene, liquids like ethanol and acetone. in medical treatment and food industry, it can also be used as drying agent
3a分子篩廣泛應用於天然氣和石油氣乾燥工藝中,尤其是石油裂解氣,乙烯、丙烯、丁二烯、乙炔等氣體的深度乾燥,可用於液體(如乙醇、丙酮)的乾燥,在醫療、食品等行業中也可用作乾燥劑。The modified pva fiber ultra short staple is a new product of modification based on the original production process for the vinylon fiber in the way of physical and chemical reactions. it is applied to replace the asbestos to make cement products
改性聚乙烯醇纖維超短纖是我公司在原維綸纖維生產工藝上加以物理化學的辦法進行改性,使之適合於取代石棉製水泥製品的纖維。The influence of retarder on the seaing time and ultimate strength of gypsum plaster was investigated in this paper. the experimental results indicate that the effect of single retarder, such as citric acid, is inferior to that of composite retarder which was made of blending citric acid with a few portland cement ( about 0. 5 ?, by weight ). the effect of different water - retention agents, such as polyvinyl alcohol ( pva ), carboxymethyl cellulose ( cmc ), and na - bentonite, etc., was also studied, and the results demonstrate that by means of adding organic and inorganic water - retention agent simultaneously the water - retention of plastering slurry can obviously be improved. the optimal mix proportion of gypsum plaster suitable to finish coat of walls and ceilings of buildings has been got by use of factorial experiment with orthogonal array accounting for interactions between factors each other
研究了分別以檸檬酸、檸檬酸與普通硅酸鹽水泥復合物作緩凝劑,調節粉刷石膏的凝結時間,並對比2種緩凝體系對石膏抗折、抗壓強度的影響.比較不同保水劑(聚乙烯醇、羧甲基纖維素)以及相同量的保水劑在不同工藝流程下保水效果上的區別.探索了有機保水劑和無機保水劑對粉刷石膏的保水性的影響.結果表明,檸檬酸與普通硅酸鹽水泥的復合緩凝劑比單純的檸檬酸更能有效地延緩建築石膏的凝結,同時建築石膏的抗折、抗壓強度降低幅度減小It produces more than 30 products of chemicals, chemical fiber, textile, and building materials with double wheel as its trademark. the company has an annual output of 50, 000 tons of vac, 25, 000 tons of pva, 60, 000 tons of calcium carbide, 10, 000 tons of vinylon staple, 32, 000 tons of polyester filament, 80, 000 tons of cement, 10, 000 tons of formaldehyde, and 10, 000 tons of pvac emulsion. some main products, for instance, pva, vinylon staple, and polyester filament, were awarded excellent product by the fujian provincial government, the ministry of textile industry of china, or our country for many times
福建紡織化纖集團有限公司主要生產以「雙輪牌」為注冊商標的化工化纖建材三大系列30餘種產品,產品年生產能力為:醋酸乙烯5萬噸聚乙烯醇2 . 5萬噸電石6萬噸滌綸加工絲3 . 2萬噸維綸纖維1萬噸甲醛1萬噸水泥8萬噸彩色母粒1200噸,同時還生產聚醋酸乙烯乳液不飽和樹脂安全網等產品。分享友人