无论如何，同时地检测呼吸中的氧化一氮、一氧化碳、,过氧化氢物、亚硝酸盐、硝酸盐,、戊烷和乙烷，将能对哮喘做确定性的诊断。
However, simultaneously monitoring nitric oxide, carbon monoxide,hydro-peroxides, nitrites, nitrates, pentane and ethane in the breath, wouldallow a much more definitive diagnosis of asthma.
随着样品容器量加大，聚氨酯的临界燃点降低，环戊烷—聚氨酯发泡塑料会发生剧烈燃烧。
The critical ignition temperature of polyurethane foam was lower as the size of the sample vessel was increased, and that the combustion of cyclopentane-polyurethane foam occurred fiercely.
主要由戊烷和己烷组成的一种挥发性石油馏分。
A volatile fraction of petroleum consisting chiefly of pentanes and hexanes.
温度计盛有戊烷或酒精。
对异戊烷及水的用量、聚醚多元醇及催化剂的品种进行了选择试验。
The amount of isopentane and water, the kinds of polyethers and catalysts were selected.
戊烷沥青质中以迫位缩合的芳香环系结构为主，胶质组分中渺位缩合与迫位缩合的芳香环系结构各占相当比例。
The aromatic structure of pentane asphaltenes is mainly peri condensed, while for resins the proportion of cata condensed and peri condensed aromatic structures is comparable.
为了能够简捷、直观地揭示、评价再生沥青的老化性能，建立了以正戊烷沥青质为参数的老化动力学模型。
The aging kinetic models in the parameter of n-pentane asphaltene is derermined for simply discovering the anti-aging property of regenerated asphalt.
甾醇是环戊烷全氢匪为骨架的一种物质，在自然界中以游离态和结合形式存在。
Sterol is a kind of substance of full cyclopentane hydrogen skeleton, and exists in the nature in free form and binding form.
为了生产用于分子筛脱蜡装置的正戊烷脱附剂，利用络合化学试剂对切割分离后的重整正戊烷油进行了脱烯烃精制实验。
In order to produce n pentane desorbing agent for molecular sieve dewaxing unit, the refining tests for reformed n pentane oil were carried out by using complexing agents.
研究发现，焦化蜡油中主要的富氮组分是较小分子的戊烷不溶物，或者是更小分子、极性较强的己烷不溶物。
It is found that the major nitrogen sources in coker gas oils are associated with relatively small pentane insoluble species and an even smaller, highly polar, hexane insoluble species.
第二个吸收峰在新戊烷中和第一个峰相重合。
当超临界正戊烷密度恒定时，溶解度还将随温度的增加而增大。
When the density of supercritical n-pentane is constant, the solubility will increase with the temperature increasing.
戊烷的定量则采用面积归一法。
这些表面活性剂具有较高的表面活性和相同的亲水基，1 ，3二氧杂环戊烷基团也有一定的亲水性。
The results showed that these surfactants have high surface activity and same hydrophilic group, and the 1,3dioxolane ring are also hydrophilic.
建立了一种用于以甲醇、异戊烯为原料、正戊烷为溶剂合成TAME反应产物测定的快速GC- FID分析方法。
A method of GC FID is established for the determination of reaction products in synthesizing TAME with methanol and isopentene as raw materials and pentane as solvent.
戊烷有三种同分异构体的无色可燃烷烃，c5h12，从石油中提炼，可用做溶剂。
Any of three colorless, flammable isomeric hydrocarbons, C5H12, derived from petroleum and used as solvents.
环戊烯与氢卤素加成反应制备卤代环戊烷，工艺流程简单，原料经济，收率高，易实现工业化。
Preparing cyclopentane halide by the addition reaction of cyclopentene with hydrogen halide is a simplified process with a high yield and can be used in a large scale.
同时，也测定了正戊烷、1 -己烯在高温下的饱和蒸汽压。
Also, the vapor pressures of n-pentane and 1-hexene at high temperatures were determined simultaneously.
测定了正戊烷的临界参数以证实该装置的可靠性。
The reliability of the apparatus had been checked by measuring the critical constants of n-pentane.
前言：描述了球形测试装置的结构，测试原理和测试步骤，并测试了七氟丙烷对甲烷和戊烷的惰化体积分数。
The essay article introduces the structure of the inerting apparatus, the test principle, the test procedure and the determination of inerting concentration.
本文还介绍了国内外天然气瓶的轻质化动向，以及开发以近临界流体凝析油戊烷——天然气体系贮存天然气的灌装线的可行性。
The current tendency for gas bottle lightening and the possibility of developing the natural gas filling line by the new storage method were introduced as well.
控制缩合反应的温度，还得到一种苯并环庚酮和一种苯并环戊烷。
One benzosuberone and one benzocyclopentane are synthesized when controlling the condensation reaction temperature.
工业生产中常用苯、环己烷、正戊烷等作夹带剂进行恒沸精馏生产无水乙醇。
Benzene, cyclohexane and normal pentane etc. are frequently used as entrainers in industrial production of anhydrous alcohol through constant boiling and fine distillation.
在天然气生产中获得的液体，被称为液化天然气(液态天然气)，其中包括乙烷，丙烷，丁烷和凝析油，它包括戊烷重碳氢化合物。
Liquids obtained during production of natural gas are known as natural gas liquids (NGLs) and include ethane, propane, butane and condensate, which comprises pentanes and heavier hydrocarbons.
广东科龙集团无氟生产线中的预混站是使用环戊烷危险物品配制发泡剂的重大危险源，燃烧爆炸事故风险较大。
Because cyclopentane is a flammable and explosive substance, the station with large quantity of it belongs to major hazard installation.
本文将详细讨论异戊烷发泡聚氨酯硬泡的生产和泡沫性能及安全控制。
This paper deals with the production and properties of iso-pentane blown PU rigid foams, and safety control.
戊烷作为发泡剂具有良好的物理和工艺性能及合适的环境数据，适合于我国聚氨酯泡沫市场。
Pentane combines advantageous physical and technical properties with good environmental data. As a blowing agent for polyurethane rigid foams, it is suitable for China market.
戊烷作为发泡剂具有良好的物理和工艺性能及合适的环境数据，适合于我国聚氨酯泡沫市场。
Pentane combines advantageous physical and technical properties with good environmental data. As a blowing agent for polyurethane rigid foams, it is suitable for China market.
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