碳四

Fe－Mn－Cr高碳四元合金马氏体相变热力学计算

^ Thermodynamic Calculation of Martensitic Transformation in Fe-Mn-Cr-high Carbon Quaternary Alloys

12（R）羟基二十碳四烯酸与大鼠肾皮质细胞膜的特异结合

Specific binding of 12 ( R ) - hydroxyeicosatetraenoic acid to rat kidney cortex membrane

但是二十碳四烯酸（AA）的含量在高的光照条件下增加；

However , the content of AA is increased in high light density .

旋流净化器用于净化MTBE装置碳四原料

The application of eddy purifier in MTBE unit for purifying C4 feed

活化条件对碳四烃氧化制顺酐VPO催化剂的影响

Effect of Activation Conditions on VPO Catalysts for Selective Oxidation of C4 Hydrocarbon

选取三种热力学模型（规则溶液，LFG，KRC模型）计算了Fe－Mn－Cr高碳四元合金的马氏体相变驱动力和Ms温度。

The driving force for martensitic transformation and Ms temperature have been evaluated using three different thermodynamic methods ( the regular solution , KRC and LFG models ) in the Fe-Mn-Cr high carbon alloys .

目的从组织功能及细胞分子水平研究电压门控型钾通道（Kv通道）亚型在15-羟化二十碳四烯酸（15-HETE）致大鼠肺动脉收缩过程中的作用。

Aim To observe the effect of subtypes of Kv channels in rat pulmonary artery smooth muscle cells ( PASMCs ) on the process of pulmonary vasoconstriction induced by 15-HETE .

本工作研究了丁烯-1的加氢异构化反应。采用硫化了的Pd-Al2O3催化剂，以碳四抽余液和炼厂碳四馏分为原料，在液相中进行异构化反应，使丁烯-1转化为丁烯-2。

Using sulfurized Pd-Al2O3 catalyst , liquid hydroisomerization of 1-butene to 2-butene in C4 raffinate of cracked gas and C4 fraction of refinery gas was studied .

当气体分馏装置的轻C4组分只作MTBE原料不作烷基化装置的原料时，气体分馏装置不设或不开碳四塔是必要的，这样可节约投资和能耗。

When light C4 hydrocarbons are used as feedstocks for MTBE but not for alkylation unit , cancelling the C4 tower from the flow diagram of a grass-roots light ends plant or shuting it down in an existing unit is necessary for investment and energy savings .

结果表明，Pd－Pb／Al2O3催化剂在一定工艺条件下可以将碳四馏份中的乙基乙炔和乙烯基乙炔分别除至1.0×10－5以下，并且保证丁二烯损失小于3%。

It is found that with certain reaction conditions Pd Pb / Al 2O 3 is an effective catalyst . After hydrogenation both ethylacetylene and vinylacetylene contents are reduced to below 1 0 × 10 - 5 , and 1,3 butadiene loss does not exceed 3 %

5-ALA的生物合成有碳四和碳五两条途径，前者在非硫光合细菌中广泛存在。

Biological ALA synthesis proceeds by two distinct pathways : C-4 pathway and C-5 pathway , the former is existed in purple non-sulfur photosynthetic bacteria .

研究了混合碳四和乙醇合成乙基叔丁基醚（ETBE）的反应精馏过程。

Reactive distillation of synthesizing ethyl tertiary-butyl ether ( ETBE ) from C4 cuts and ethanol was investigated , in which the structured packing coated with β zeolite was used as catalyst .

兰州石化公司生产高辛烷值汽油的碳四加工联合工艺，原采用催化裂化生产的轻碳四馏分，由MTBE、聚异丁烯、气体分馏、叠合和烷基化等装置组成，流程较长。

The original combined process for C 4 processing to produce high octane value gasoline in Lanzhou Petrochemical Company was made up of MTBE , polyisobutylene , gas fractionation , polymerization and alkylation units , taking FCC light C 4 distillate as feedstock .

血小板中环氧酶和脂氧酶作用于花生四烯酸代谢系统，可产生形成血栓的血栓烷A2（TXA2）及引起过敏性疾病的12－羟基二十碳四烯酸（12－HETE）。

In platelets , cyclooxygenase and lipoxygenase catalyze the initial reactions for the formation of two major arachidonic acid metabolites , thromboxane B 2 ( TXB 2 ), 12 hydroxy 5,8,10,14 eicosatetraenoic acid ( 12HETE ) .

目的研究15-羟廿碳四烯酸（15-HETE）对正常及缺氧状态的离体大鼠颈内动脉环的作用，探讨15-HETE在缺血/缺氧性脑损伤的病理生理过程中的作用。

Aim To evaluate the effect of 15-hydroxy eicosatetraenoic acid ( 15-HETE ) on the tension of isolated internal carotid artery ( ICA ) rings in normoxic or hypoxic rats in order to find out the pathophysiological effect of 15-HETE in ischemic / hypoxic brain tissues .

碳四烯烃催化裂解制丙烯的研究

Study on Production of Propylene from C4 Olefins by Catalytic Cracking

剩余碳四原料及其加氢产物的气相色谱分析

Analysis on Surplusage of C_4 and Its Hydrogenation Products by GC

15-羟廿碳四烯酸对缺氧性大鼠颈内动脉环的收缩作用及机制

Contractile effect and mechanism of 15-HETE on hypoxic rat ICA rings

同时甘蔗也是光合效率最高的碳四作物。

Sugarcane belongs to Hatch-Slack crop and fixes solar energy efficiently .

复合离子液体催化碳四烷基化反应性的研究

CARBON NANOTUBES Study on isobutane alkylation catalyzed by composite ionic liquid

碳四催化精馏加氢工艺的开发研究

The Development and Research of C4 Catalytic Distillation Hydrogenation Technology

石脑油与碳四非临氢改质技术的工业应用与分析

Industrial Applications and Analysis of Naphtha and Carbon Four Non-hydrogen Reforming Technology

碳四馏分中烯烃资源的利用调研

Investigation of making use of olefin resource in C_4 component

二维气相色谱技术分析混合碳四馏分中微量炔烃

Analysis of trace alkynes in mixed C_4 fractions by two-dimensional gas chromatography

20-羟廿碳四烯酸在低碳酸血症犬脑血管收缩中的作用

Role of 20 - hydroxyeicosatetraenoic acid in hypocapnia-induced cerebral vasoconstriction in dogs

催化裂化碳四馏分加工方案对比

Contrast of Processing Programmes of C_4 Fractions from Fluid Catalytic Cracking Unit

仲丁醇、水、碳四烃高压液液相平衡系统的气相色谱分析

Gas chromatographic analysis of 2-butanol & water-n-butane liquid-liquid equilibrium system

生产高辛烷值汽油的短流程碳四加工联合工艺

Short-flow combined process for c_4 processing to produce high octane value gasoline

气体分馏装置中碳四塔的地位

The c_ ( 4 ) tower 's position in light ends plant

富含1,3-丁二烯的裂解碳四选择加氢工艺研究

Study on Selective Hydrogenation of 1,3-Butadiene-Rich Cracking C _4 Stream