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fractionation

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fractionation n.【化學】分餾(法)；分層分離，分級分離，份化。

n. 【化學】分餾(法)；分層分離，分級分離，份化。 “abyssal fractionation“ 中文翻譯：   深海分異作用“adsorptive fractionation“ 中文翻譯：   吸附分餾“air fractionation“ 中文翻譯：   風動分級“basinbasin fractionation“ 中文翻譯：   海盆海盆間分異作用“basinshelf fractionation“ 中文翻譯：   海盆陸架間分異作用“biogenic fractionation“ 中文翻譯：   生物成因分化作用“biologic fractionation“ 中文翻譯：   生物分餾“blood fractionation“ 中文翻譯：   血的分劃“carbonisotope fractionation“ 中文翻譯：   碳同位素分餾“cell fractionation“ 中文翻譯：   細胞[組分的]分級分離; 細胞分部分離; 細胞分級分離“cellular fractionation“ 中文翻譯：   細胞分級分離“chemical fractionation“ 中文翻譯：   化學分部分離“chromatographic fractionation“ 中文翻譯：   層析（分級）分離; 色層分離; 色譜分級; 色譜分離“chromosome fractionation“ 中文翻譯：   染色體分級分離“close fractionation“ 中文翻譯：   分成窄餾分“cohn fractionation“ 中文翻譯：   科恩分部分離法“column fractionation“ 中文翻譯：   柱分級; 柱上分級“continuous fractionation“ 中文翻譯：   連續分餾“crystal fractionation“ 中文翻譯：   結晶分異作用“crystallizing fractionation“ 中文翻譯：   結晶分提“degree of fractionation“ 中文翻譯：   分餾度; 分餾精確度“density fractionation“ 中文翻譯：   密度分離法“depositional fractionation“ 中文翻譯：   沉積分異作用“wax fractionation“ 中文翻譯：   石蠟分餾“fractionation by adsorption“ 中文翻譯：   吸附分離“fractionatingtray“ 中文翻譯：   分餾塔的塔盤

fractionator

6 - phosphogluconate dehydrogenase ( 6 - pgadase , ec 1 . 1 . 1 . 44 ) was isolated by homogenate , ammunium sulfate fractionation , deae - sepharose chromatography , blue - sepharose affinity chromatography and gel filtration with sephadex g - 200 from bacillus subtilis , and some properties of the enzyme had been studied . a 113 . 8 - fold purification was obtained with a 8 . 2 % yield . the purified enzyme moved as a single electrophoretic band in page 將枯草芽孢桿菌超聲波破壁后的粗提取物進行分段鹽析、 deae - sepharose陰離子交換柱層析， blue - sepharosecl - 6b特異結合柱層析和sephadexg - 200凝膠過濾等純化步驟，得到聚丙烯酰胺凝膠電泳為單一蛋白區帶，比活為1 . 46u mg的酶制劑。

During diagenetic process , there may exist the fractional crystallization of clino - pyroxene , plagioclase , olivine and ti - fe oxide , and the accumulation of olivine . the alkalic - ultramafic dikes formed by low degree partial melting ( 3 . 4 % ) of enriched mantle , consist of single olivine pyroxenolite , the dominating olivine fractionation is evident 成因上為富集地幔部分熔融作用的結果，但在成巖過程中也可能存在單斜輝石、斜長石、橄欖石和ti - fe氧化物等礦物的分離結晶作用。

- acetolactate decarboxylase are widely found among bacterial strains but not in other groups of organisms . the enzyme has been demonstrated to be effective for removal of acetolactate and widely used in beer product . in this paper , - acetolactate decarboxylase from bacillus subtilis was purifed to homogeneity from cell extract by ammonium sulfate - fractionation , heat treatment , deae - sepharose fast flow column chromatography 本文對來源于枯草芽孢桿菌( bacillussubtilis ) 3226 - 5的-乙酰乳酸脫羧酶經硫酸銨分級沉淀、熱處理、 deae - sepharosefastflow離子交換柱層析等分離純化步驟，得到sds - paeg電泳純，通過n末端氨基酸序列分析驗證酶蛋白的純度。

There are a variety of mechanisms believed to be involved , including genomic modularity - - the ability for animals to reorganize their genome in response to stress or other outside influence , heterozygous fractionation ( heterozygous genes in parents can lead to speciation by having multiple homozygous genes in children ) , and standard evolution 認為涉及很復雜的變化機制-動物重組基因組響應壓力或其它外在影響的能力（雙親基因雜交會導致孩子們擁有許多純合子基因的物種形成） ，而標準地進化。

An integration of neural network and genetic algorithm method is proposed for optimizing the operating conditions in order to lower energy consumption of gas fractionation plant . this paper synthesizes the current chemical engineering process optimization and characterizes chemical engineering process many layer optimizations frame to proceeds first , and treatise detailed operation optimization at the same time 本文首先綜合目前化工過程優化方面的科研成果，對化工過程多層優化框架的特點進行了簡要的說明，同時對操作優化過程進行了詳細的論述，本文以某廠氣體分離裝置為對象，對其操作進行優化研究。

Then by methods of fractionation of inorganic and organic p in soils and multivariate statistical analysis , this paper discussed phosphorus fractions in soils with three fertility levels and in different soil layers . the affecting factors on fast - available p ( avail . p ) were also related 在此基礎上，用無機磷分級和有機磷分組方法、多元統計分析的方法，研究了石灰性土壤不同肥力與不同土層中磷素的各種形態含量差異以及影響速效磷的因素，結果如下： 1

- acetolactate decarboxylase is purifed from cell extract by 50 % - 80 % ammonium sulfate - fractionation , 50 , 2min heat treatment and deae - sepharose fast flow column chromatography , which we study the different ph and different buffer of deae - sepharose fast flow column chromatography and conclude ph 6 對其酶學性質進行了研究。 -乙酰乳酸脫羧酶經50 80硫酸銨分級沉淀、 50 ， 2min熱處理、 deae - sepharosefastflow離子交換柱層析方法分離純化。

Increasing local control and sur - vival after definite chemoradiation seems possible not only by using optimized radiation fractionation schedules and escalated total doses , but also by associating more convenient and less toxic chemotherapy agents at the right cytotoxic or radio - sensitizing dose 明確的放化療后無論是選用優化放療加大總劑量，還是在細胞毒素或敏感放療劑量中加用方便并且毒性小的化療藥物，似乎都能提高局部控制和生存期。

Without ammonium sulphate fractionation and dialysis , the supernatant of crude extract was directly loaded on deae - sepharose cl 6b column equilibrated by phosphate buffer ( 50mmol / l , ph7 . 8 ) , and the enzyme fraction was not absorbed on the column but impurities were absorbed 粗酶液無需硫酸銨沉淀及透析，即可引入磷酸緩沖液( 50mmol l ， ph7 . 8 )預平衡的deae - sepharosecl6b柱，上柱后用平衡緩沖液洗至基線穩定。 afpga不被吸附而直接流出。

The condensates that derived from coals in yangtake structure are mixed by the light compositions from triassic lacustrine mudstones . the distribution of nitrogen compositions proved that differences of compositional fractionation existed in different carrier systems from source to trap in kuche basin 利用含氮化合物的運移分餾效應證實了，在從源巖到圈閉的聚集過程中，庫車盆地不同的輸導系統產生的原油分餾效應的差異。

Based on the distribution of the unknown compounds “ x “ ( between ts and tm ) in oils and rocks , in combination with the theory of gas - washing evaporative fractionation , the formation of the light oils in kela 2 - 3 dry gas reservoir is explained 根據萜烷中未知“ x ”化合物在原油中分布的普遍性和在烴源巖中的分布特征，結合氣洗蒸發分餾作用的原理，解釋了克拉2 - 3號干氣藏中少量輕質油的成因。

Abstract : using soy lecithin concentrates as raw material , through ethanol extraction of pc , fractionation of detoxin , vacuum concentration , deoil in acetone , absorbents decoloration , filtration , concentration , the soy lecithin rich in pc was obtained 文摘:以濃縮大豆磷脂為原料，用乙醇萃取富集卵磷脂餾分，經分離去毒、真空濃縮、丙酮脫油、吸附脫色、過濾、濃縮，得到大豆卵磷脂。

The stable isotopic research is established by studying the discrepancy in isotope ratio , which was caused by isotope fractionation , and the isotopic ratio difference can be determined by mass spectrometer 穩定同位素的研究主要是建立在此同位素分化作用所造成的同位素比值差異，而此同位素比值差異可被質譜儀測知。

The petroleum migration fractionation in the south part through unconformity and permeable carriers laterally is more obvious than that in the north part through the fault systems vertically 南部油氣通過不整合面和滲透性巖層輸導系統發生的側向運移明顯比北部通過斷裂輸導系統的垂向運移分餾效應要強。

The purified badh , which became a single band in sds - page , has been obtained by a combination of ammonium sulfate fractionation , ion exchange chromatography and gel filtration chromatography 遼寧堿蓬甜菜堿醛脫氫酶分子量為129kd ，單個亞基的分子量為64 . 5kd ，表明其為同型二聚體。

Recently , some techniques , like liquid - liquid extraction , headspace , chromatography fractionation and spme , have applied to the researches of aroma compounds in chinese rice wine 近年來，頂空取樣、液液萃取、色譜分離技術、固相微萃取等技術已經開始應用于黃酒的風味成分研究。

Supercritical fluid extraction and fractionation ( sfef ) are used to separate daqing and liaohe decanted oils into a number of narrow fractions 摘要以大慶和遼河油漿為研究對象，采用超臨界流體萃取分餾技術將其切割成窄餾分，分析了油漿窄餾分的性質及組成隨收率變化的規律。

The results of the simulation of the control system in ethanol fractionation process indicate that the method of optimization is excellent and easy to apply in engineering 利用該算法對乙醇分離過程進行了滿意控制系統仿真，結果表明，該算法行之有效，易于工程實現。

The isbl of this hp hydrocracker unit will start at the unit filter feed vessel and conclude at product rundowns from the fractionation and the naphtha minus section 該高壓加氫裂化裝置的界區從裝置過濾器進料罐開始，直到從分餾與脫石腦油段來的產品出料罐為止。