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The headspace gas chromatography was used to determin the ethanal content in the production process of bottle grade PET chip.

论述了瓶级聚酯切片生产过程中，采用顶空气相色谱法测试切片中乙醛含量的称样量、样品处理、颗粒度、顶空热平衡时间、热平衡温度、标定及其他顶空测量参数的优化。

The "extinctive line method" is suggested for surveying the strike-dip of structural planes. The concept of Rock-slope Spatial Information System based on remote sensing of ground photogrammetry, and the method of "layer calculation" for study of rock blocks and sliding planes are put forward.

提出了测量结构面产状的&灭线法&；提出了以量测摄影仪与普通相机相结合的地面摄影遥感为基础，建立岩坡空间信息系统的概念；提出了分析块体和滑面的&层运算&方法。

The volume ratio of furaldehyde to acetic anhydride is 1∶2; the mole ratio of furaldehyde with anhydrous potassium carbonate is 1.00∶0.54. The best phase transfer catalyst is PEG1000, the mass ratio of PEG1000 with furaldehyde is 4.3%, the reaction time is 11 min, the reaction power of microwave is 260 W. The yield ofα-furanacrylicacid is up to 72.3% under these reaction conditions.

研究结果表明：在微波辐射功率为260 W、微波反应时间为11 min、以聚乙二醇1 000(PEG1000)为相转移催化剂，糠醛与乙酐的体积比为1∶2，糠醛与无水碳酸钾的量比为1.00∶0.55时，α-呋喃丙烯酸的产率为72.3%。

Then the fiber was transferred to a 4 mL vial which was filled with 100 μL of trifluoroacetic anhydride and stood 30 sec for headspace extraction. Afterward the fiber was transferred again to another blank 4 mL vial and stood 10 min for on-fiber derivatization before the analysis with GC/MS. The absorption-time profiles for both furoic acid and creatinine were examined.

有关尿中肌酸酐的量测，首先亦使用65μm PDMS/DVB纤维，在电磁搅拌转速1200rpm下以直接样本接触方式吸附60秒后，将已吸附肌酸酐的纤维挪至装有100μL无水三氟醋酸的4mL样本瓶中顶空吸附30 sec，再将纤维挪至另一个空白的样本瓶并静置10min（以利衍生物trifluoroacetamide的生成），最后再以气相层析质谱仪进行分析。

The structure of resultant IPN hydrogels was successfully characterized by Fourier transform infrared spectroscopy and scanning electron microscopy; the water retention at 50℃ was measured gravimetrically; dependence of storage modulus on temperature and phase transition behavior were investigated by dynamic mechanical analysis and differential scanning calorimetry, respectively.

利用FTIR和SEM分别表征了凝胶的化学结构和内部形态；测定了凝胶在高温(50℃)时的退溶胀性能；利用DMA和DSC分别研究了凝胶的储能模量随温度的变化及热相转变行为。

XRD and SEM were used to analyze the phrases and microcosmic structure of the hercynite in different temperatures in N2 atmosphere, and the effects of sintering temperature and Fe content on the sintering performance were also studied.

通过XRD和SEM分析在N2气氛中不同热处理温度制备铁铝尖晶石材料的相组成及其显微结构，研究了烧结温度和铁加入量对试样烧结性能的影响。

The infrared spectra indicate that polyurea microcapsules have been successfully synthesized;all the TG thermographs show microcapsules containing n- hexadecane can sustain high temperature about 300 ℃ without broken and the DSC measurements display that all samples possess a moderate heat of phase transition; thermal cyclic tests show that the encapsulated paraffin kept its energy storage capacity even after 50 cycles of operation.

红外谱图显示合成了聚脲微胶囊，热重曲线表明含正十六烷的聚脲微胶囊能够耐受大约 300 ℃高温，差示扫描量热测试表明所有样品均具有合适的相转变热，冷热循环实验揭示微胶囊能够维持储热容量不衰减。

In this study, the amount of ethylene and its key biosynthesis genes expression, typical allelochemical hydroxamic acid concentration and the key regulation genes (BX1 and BX9), as well as the dynamic expression and time of relevant defense key genes of secondary substance metabolism processes were compared in ethephon treatments of different concentration and duration.

为探明外源乙烯利对玉米化学防御作用诱导的浓度和时间效应，本文采用化学和分子生物学相结合的方法，研究了不同浓度乙烯利处理玉米后，叶片乙烯释放量及其合成调控关键基因ACS和ACO表达的变化，典型化感物质丁布的含量及其关键调控基因BX1和BX9表达的变化，以及其他调控次生代谢物的关键基因表达的时间动态。

The results show that this kind of IPN hydrogels are temperature-sensitive, and, compared with inorganically crosslinking PNIPAAm hydrogels, these IPN hydrogels exhibit enhanced storage modulus and ultrafast response rate, such as losing water of 90% within 10 min because of the porous structure which provides the water-releasing channel; by incorporation of PAAm network, the phase transition of PNIPAAm hydrogels is weakened, but the lower critical solution temperature is increased.

研究表明，该IPN凝胶具有温度敏感性；与未互穿的无机交联PNIPAAm凝胶相比，IPN凝胶具有多孔的网络结构和超快的响应速率，如10min内失去90%的水；其储能模量增加了3~4倍，相转变行为变弱，而最低临界溶解温度提高了1.4℃。

The ozone concentration in gas phase is determined by means of iodometric method.

气相臭氧浓度测定采用碘量法。下议院通过的那一点微薄的赐资根本无从解决他经济上的困难。

For a big chunk of credit-card losses; the number of filings (and thus charge-off rates) would be rising again, whether

年美国个人破产法的一个改动使得破产登记急速下降，而后引起了信用卡大规模的亏损。

Eph. 4:23 And that you be renewed in the spirit of your mind

弗四23 而在你们心思的灵里得以更新