petroleum fraction 中文意思是什麼

petroleum fraction 解釋
石油分餾物
  • petroleum : n. 石油。 crude [raw] petroleum 原油，重油。
  • fraction : n. 1. 小部分，碎片，片斷。2. 一些，一點兒。3. 【化學】分餾，分層，分級。4. 【宗教】聖餐麵包分切式。5. 【數學】分數。
  1. According to the polarity, the residue was isolated with petroleum ether, chloroform, ethyl acetate, and n - buoh, respectively. the n - buoh fraction, confirmed as neuroactive component, was subjected to sephadex lh - 20 column chromatography to provide an extract fraction, as a buff powder, which could induce neurite outgrowth in rat pheochromocytoma pc12 cells in a dose - dependent manner up to 50 mg / l

    將菟絲子乾粉用75乙醇浸泡后，減壓蒸干后得到褐色漿狀物，經石油醚、氯仿、乙酸乙酯、正丁醇萃取，經柱層析后，再用葡聚糖凝膠對有效成份進一步純化，獲得了菟絲子中能誘導pc12細胞分化的活性組分。
  2. It is studied that the formation mechanism of taylor bubble and its control method in gas - liquid two - phase flow, which affects the pressure balance and mechanical driving efficiency in the flow of petroleum engineering. experiments show that the formation of taylor bubble in gas - liquid two - phase flow is due to the intensive congregation and amalgamation of small bubbles driven by void fraction waves and that the highly turbulent flow is able to restrain this formation. thus, the flow regime transition may be checked by increasing the flow turbulence and controlling the disturbed frequency

    對大管徑氣-液兩相流動中嚴重影響壓力平衡與機械驅動效率的段塞流生成機制和控制方法進行了研究，實驗證明段塞流的形成是由於空隙率波的大幅度增長使氣泡高度集中，並形成聚並所致。強湍流運動可以抑制taylor泡的形成。因此，通過強化湍流或控制擾動頻率可以對氣泡聚並起明顯的抑制作用。
  3. It is a light fraction of petroleum. it can be used as solvent of insecticide aerosol, medicine and dyeing

    本產品為由石油的輕質餾分，經深度加氫精製所制得的hr - 92殺蟲氣霧劑用油。
  4. A volatile, flammable fraction of petroleum, obtained by distillation and used as a solvent

    石油類是石油當中易揮發，易點燃的成分。通過蒸餾獲得，用作溶劑
  5. 05. 01 test method for isolation of representative saturates fraction from low - olefinic petroleum naphthas

    從低烯石腦油中分離代表性飽和部分的試驗方法
  6. 05. 01 test method for isolation of representative saturates fraction from high - olefinic petroleum naphthas

    從高烯石腦油中分離代表性飽和部分的試驗方法
  7. Method for inspection of pona of naphtha for exportmethod for isolation of represenlativesaturates fraction from low - olefinic petroleum naphtha

    出口石腦油pona值檢驗方法低烯烴石腦油中飽和烴的分離
  8. The effect of volume fraction and particle diameter on properties of petroleum - based erf

    體積分數及粒徑對石油基電流變液特性的影響
分享友人
分享到 Line

分享到臉書