查询词典 Pet.

Siemens Biograph PET/CT is a combined positron emission tomography and computed tomography system,and combined PET/CT systems are taking place of single PET to be the main choice of clinical application.

Biograph 系列扫描仪是西门子公司研制的高性能 PET 和螺旋 CT 一体化的混合 PET/CT 扫描系统，PET/CT 混合成像系统正在取代单独 PET 系统成为临床应用的主要选择。

Recombinant ptotein made up 39.2%(pET-20b-bglA) and 33.5%(pET-28a-bglA) of the total proteins in the intracellular fraction, the solubility proportion of the enzyme up to 32.8%(pET-20b-bglA) and 40.1%(pET-28a-bglA), the activities of the enzyme were 66.8 (pET-20b-bglA) and 71.2 U/mg (pET-28a-bglA). These results showed that E. coli BL21-CodonPlus (DE3)-RIL with argU tRNA, ileY tRNA and leuW tRNA genes helped to improve expression of the enzyme through enhanced identification of the rare codons AGA/AGG, AUA and CUA. Further optimized the conditions for inducing, the solubility proportion of the enzyme was 70.6% at 16 °C and 1.2 times higher than 37 °C. The solubility proportion of the enzyme increased from 12.3% to 32.8% when IPTG concentrations dropped from 1000 μM to 25 μM. The recombinant enzyme was purified by heat treatment, DEAE Sepharose anion-exchange chromatography and TOYOPEARL HW-55F.

maritima MSB8 的-葡萄糖苷酶基因 bglA克隆至表达载体 pET-20b 和 pET-28a，构建重组质粒 pET-20b-bglA 和 pET-28a-bglA，然后转化不同大肠杆菌 E.coli 宿主，Tm-SIGlA 在 E.coli BL21-CodonPlus(DE3)-RIL 中获得高效表达，重组蛋白的表达量为 33.5%(pET-28a-bglA)和 39.2%(pET-20b-bglA)，可溶性比例为 32.8%(pET-20b-bglA)和 40.1%(pET-28a-bglA)，比酶活达 66.8 (pET-20b-bglA)和 71.2 U/mg (pET-28a-bglA)，这些结果表明，E.coli BL21-CodonPlus(DE3)-RIL 宿主带有的 argU tRNA、ileY tRNA 和 leuW tRNA 基因，分别增强对稀有密码子 AGA/AGG、AUA 和 CUA 的识别，有助于提高该酶在 E.coli 中的表达；进一步优化诱导条件，重组 E.coli BL21-CodonPlus(DE3)-RIL/pET-20b-bglA 在 37 ℃下诱导培养，IPTG 浓度由 1000 μM 降至 25 μM，目的蛋白可溶性表达由 12.3%增至 32.8%，提高 1.7 倍，16 ℃下低温诱导实现目的蛋白 70.6%的可溶性表达，较 37 ℃下诱导培养提高 1.2 倍。

The homogeny of fragment and syncephapepsin was about90%byBLAST.3.pET-22b、 pET-28a、 pET-30a、 pET-40bofpET vector system were chosen to construct expression vectors.

选择了pET载体系统中的四种载体：pET-22b、pET-28a、pET-30a、pET-40b，分别构建了表达载体。

The main works include: 1. successfully observed the opalescence of critical methanol and the phase variation of PET degradation in methanol, studied the internal construction of PET in different stages of degradation, provided the conception of critical region and noncritical region of system in which PET and methanol participated.

主要内容如下： 1 实验观测了甲醇的临界乳光现象及PET在甲醇中降解的相态变化，同时研究了不同降解反应阶段PET内部结构特征，在本实验研究的范围内提出了PET在甲醇中的系统临界区域和非临界区域的概念。

The Surface composition of grafted PET fiber was characterized by ATR-FTIR. THE results showed that there were no obvious differences between ungrafted and graft PET fiber in the spectra ,except that the typical peak of-OH in 3100cm~(-1) appeared in both Citric acid treated PET fiber and Acrylic acid treated PET fiber indicated citric acid and acrylic acid had been successfully grafted on the surface of PET fiber.

对样品的接枝效果进行红外光谱表征，发现无论是经过丙烯酸接枝处理，还是柠檬酸接枝处理，处理前后纤维的红外吸收光谱图都没有明显的区别，说明接枝前后纤维的主体性质没变，但是，二者在3100cm~(-1)处都出现了羟基的特征吸收峰，说明柠檬酸和丙烯酸都已经接枝上了PET纤维表面。

The main work is as followings: First, we use KE SI DA microscope for observing the appearance and configuration of bicomponent fiber. It was found in the bicomponent fiber it is a bilateral array for the PET and PTT. The cross section is anisomerous with PTT and PET side by side. After heat treating the shape of single filament becomes three dimensional curly and the number of crimp is biggest in the condition of relaxation. In the range of some tention, the bulkiness and crimpness fall obviously after the bicomponent fiber is treated with heat.

首先利用科视达观察了PTT/PET双组分复合纤维的外观形态，发现PTT/PET双组分复合纤维中PTT、PET两种组分呈双边分布，横截面呈不对称的哑铃状，PTT和PET两组分分居在横截面两侧，单丝经热处理呈现出三维立体卷曲，在无张力条件下卷曲数最多，在一定的张力范围内，随着所加负荷的增加，PTT/PET双组分复合纤维热处理后的蓬松性及卷曲性均下降显著。

A series of poly/PET-copolyester polymer blends and fibers from these blends are preparated . The polymer blends are : PET/CDP(CDP: cation dye dyeable polyester or high pressure type cation dye dyeable polyester); PET/ECDP(easy cation dye dyeable polyester or normal pressure type cation dye dyeable polyester); PET/ECDP/polyethyleneglycoland PET/CGP. The transition temperature, crystalline structure, rheological behavior and thermal stability were studied .

本文制备了聚对苯二甲酸乙二醇酯／高压型阳离子染料可染聚酯；PET／常压型阳离子染料易染聚酯；PET／ECDP／聚乙二醇和PET／CGP一系列PET／PET-共聚酯共混物及纤维，对其转变温度、结晶性能、流变性能及热稳定性进行了研究。

We can produce all kinds of thermal laminating film, include BOPP+EVA, PET+EVA, Metallised PET, hologram PET and PET pouch film.

我们可以生产各种Bopp预涂膜，PET预涂膜，PET镀铝膜和镀金膜，以及镭射膜。

The clinical therapeutic strategies were changed in 22 cases due to the results of PET/CT,and the influence rate of PET/ CT was 28.6 %(22/77).Conclusion PET/CT can detect the primary lesions, recurrence and metastasis of gastrointestinal tumor with high sensitivity and accuracy. 18F-FDG PET/CT imaging has increased accuracy of the diagnosis, staging, restaging for gastrointestinal tumor.

PET/CT能准确、灵敏地检测胃肠道肿瘤原发病灶、转移以及复发病灶，对临床治疗决策有重要影响。18F-FDG PET/CT显像对胃肠道恶性肿瘤的分期、术后再分期诊断有较高的临床价值。

Result showed that MMTs/PET composites had the rapidest crystallization rate, and nano TiO 2/PET composites have similar crystallization behavior to that of nano SiO 2/PET.

近年来，PET的改性已成为其应用领域的一个热点问题，其目的是使PET应用于更广泛的领域，例如，薄膜、包装瓶、抗静电PET、远红外反射PET等。

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。