挥发的

In the research of prescription, through the experiments we knew the influence from the Nb_2O_5 or Y_2O_3 single donor doped on high-temperature PTC ceramic, and got the curve graph drawing the resistivity and mixing quantity. In order to restrain lead volatilize and mix the rang of donors to neutralization the harmful acceptor impurity in raw materials, adopt the prescription design of Nb_2O_5 and Y_2O_3 double donors-doped. From the result, we know that regulation proportion of Nb , Y double donors, can make high-temperature PTC ceramics semiconducting, the pottery demonstrates good electric performance.

为了能够更有效的抑制铅挥发，并且使掺杂范围能够更好的调节，以"中和"原材料中的有害受主杂质，在配方设计中采用了Nb_2O_5和Y_2O_3双施主掺杂的配方，由结果可知，适当的调节Nb、Y双施主掺杂总量及Nb、Y掺杂比例，可以使高温PTC陶瓷充分的半导化，陶瓷表现出良好的电性能。

Major conclutions from this study can be summarized as following:1. On mineralogy, rutiles, apatites, epidotes and vein minerals from UHPM rocks were firstly and systematically studied, by detailed petrography and mineral-chemistry investigation, some mineral or mineral assemblage with special composions or texture were firstly found in UHPM rocks from Sulu-Dabie, for example, corrudum, magnesite, high-Ti biotite and garnet were found as inclusions in rutiles from eclogites, Nb-Fe rutile and zoned Si-Y apatite were found in gneiss, epidote / allanite with euhedral zones like magmatic genesis were found in elogites and gneiss, a lot of minerals with high REE, HFSE, LILE and volatiles were found in veins of gneiss.

在矿物学方面，首次较为系统地研究了超高压变质岩中的金红石、磷灰石、绿帘石等副矿物，并通过详细的岩相学和矿物化学研究，首次在苏鲁-大别超高压变质岩中发现了一些具有特殊成分/结构的矿物或矿物组合，如在榴辉岩金红石中发现了刚玉、菱镁矿、高钛黑云母和石榴石矿物包裹体，在片麻岩中发现了Nb-Fe金红石和具有自形环带结构的高Si-Y磷灰石，在榴辉岩和片麻岩中发现了具有类似岩浆成因的自形生长环带结构的绿帘石/褐帘石，在片麻岩的脉体中发现了大量富含稀土元素REE、高场强元素HFSE(Nb、Ta、Zr、Ti)、大离子亲石元素LILE(K、Th、U、Sr、Ba)，以及挥发性组份(CO_2、F、P、S)的特殊矿物，丰富并提升了超高压变质岩的矿物学研究。2。

In the program, on theoretically we have studied the effects of configuration, the arranged periodic length and the refractive index ratio on PBG using finite difference time dormain method; on experimental, we have synthesized monodispersed silaca microspheres with size of 150-320 nm by colloidal chemical methods. And 3D perfect photonic crystals were prepared using the evaporating of acetone self-assembling the monodispersed SiO2 microspheres on quartzes by and horizontal and vertical deposition methods.

在本项目的研究中，理论上我们应用有限时阈差分法研究了光子晶体光子带隙形成与空间构型、排列的周期长度及折射率比之间的关系；实验上，我们应用胶体化学方法制备了150-320 nm的SiO2胶体微球，以丙酮为挥发溶剂，通过水平重力沉积法和垂直自然吸附法制备了各种粒度、排列完美的面心立方光子晶体。

Volatile gas and air mixture to form a mixture of explosive gases, open flame easily encountered explosions; When reached its explosive limit, the little attention, one pulling the light switch, or open the power tools, electric spark generated will lead to serious consequences.

挥发性气体与空气的混合物形成的爆炸性混合气体，遇到明火容易爆炸；当达到其爆炸极限，很少注意的，一个拉电灯开关，或者开启电动工具，产生的电火花会导致严重的后果。

For example imitation board and its products with the European edition of formaldehyde "shaving board," the standard indicators consistent; Solvents, benzene-based paint wooden limited value and the "Community eco-labelling products -- Seqi and varnishes ecological commands" the same; Carpet, carpet pad and carpet products used Jiaonianji divided into A, B levels, a level of environmental protection - which the limited value with the United States under the carpet Association standards volatile organic compounds, formaldehyde, and other indicators of the same; the conditions of application of radioactive materials into civil construction and industrial materials of construction, civil construction is divided into one category and class civil construction, and then, in accordance with A, B, C classification.

比如人造板及其制品中的甲醛限量与欧洲&刨花板&等有关标准的指标相一致；溶剂型木器涂料中苯的限量值与&欧共体生态标志产品―――色漆和清漆生态指令&相同；地毯、地毯衬垫及地毯用胶黏剂产品分为A、B两级，其中A级环保型的限量值与美国地毯协会标准规定的挥发性有机化合物、甲醛等指标相同；建筑材料放射性把材料适用条件分为民用建筑和工业建筑，民用建筑又分为一类和二类民用建筑，然后按照A、B、C分类。

The volatile compositions in liquid CO2 hop extract or compressed hop of homemade SA-1 hop were analyzed by headspace so- lid-phase micro extraction. Multiple indexes including total resin, soft resin, hard resin,α-acid,β-acid, and polyphenols in SA-1 hop were measured and then the parameters of SA-1 influencing beer brewing were compared with foreign quality hop SAAZ.

采用顶空固相微萃取方法对国产香型啤酒花品种札一的压缩花和液态CO2浸膏中的挥发性成分进行了分析，并测定了该啤酒花品种的总树脂、软树脂、硬树脂、α-酸、β-酸和啤酒花多酚等多项指标，并与国外优质香型花SAAZ的各项影响酿造性能的参数进行了比较。

Lid-phase micro extraction. Multiple indexes including total resin, soft resin, hard resin,α-acid,β-acid, and polyphenols in SA-1 hop were measured and then the parameters of SA-1 influencing beer brewing were compared with foreign quality hop SAAZ. The results suggested that SA-1 hop had lower content of α-acid（3.40 % w/w,its content of β-acid was 3.50 % and co-humulone ratio was 23.92 % rel.

采用顶空固相微萃取方法对国产香型啤酒花品种札一的压缩花和液态CO2浸膏中的挥发性成分进行了分析，并测定了该啤酒花品种的总树脂、软树脂、硬树脂、α-酸、β-酸和啤酒花多酚等多项指标，并与国外优质香型花SAAZ的各项影响酿造性能的参数进行了比较。

The pH, acetic acid, propanoic acid and VFAs were detected, in Selenomonas ruminantium culture fluid at Oh, 6h, 12 h, 24 h, 36 h, after adding yeast. The results indicated that lactate uptake can be stimulated by all of the six yeast strains at all of six concentrations levels.

实验设6个酵母组和一个未添加酵母的对照组，为了检测酵母的最适添加浓度和有效作用时间，将每一个酵母组均设6个浓度水平：2g／L，4g／L，6g／L，8g／L，10g／L，12g／L，并且在实验的0h、6h、12h、24h、36h分别取样，检测培养液的pH值和乙酸、丙酸等挥发性脂肪酸的含量。

For ozonolysis, the SOA yield has not been changed by inorganic seed aerosol, because the products are mainly carboxylic acids, which has much lower saturation vapor pressure and thus easily undergo homogeneous nucleation or gas-particle partitioning to be in the aerosol phase.

而对于α-蒎烯臭氧氧化的过程，实验结果表明，干态硫酸铵颗粒物种子的存在对SOA产率无影响，对臭氧氧化生成的SOA分子鉴别的结果表明，可鉴别组分中有很高比例的有机羧酸类物质，这一比例远高于光氧化产物，这些有机酸具有较低的挥发性而极易形成颗粒相，并且不参与异相酸催化反应。

"When you have an exhaled breath, there are all sorts of volatile organic compounds that are produced," says Serpil Erzurum, a pulmonologist at Cleveland Clinic and co-author of a 2005 study on the use of electronic noses to help diagnose lung cancer.

& 2005年度研究项目&利用电子鼻帮助诊断肺癌&的发起人之一、克里夫兰临床研究中心的肺病专家瑟皮尔·厄祖鲁姆说：&当你呼气的时候，就会产生各种各样的挥发性有机化合物，这些化合物是新陈代谢造成的。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。