生物样品

With the development of science and technology, sensitive, rapid, reproducible, simple and accurate analytical methods are required for the determination of trace elements in geological, biological and environmental samples. The direct determination of extremely low concentration of trace element with modern atomic spectroscopic method, such as atomic absorption spectrometry is so difficult. On one hand, the limitations are associated not only with the insufficient sensitivity of these techniques but also with matrix interference.

随着科学技术技术的发展，在进行地质、环境、生物等样品中痕量金属元素的测定时，常常要求达到ppb级的水平，虽然火焰原子吸收分光光度法具有很高的灵敏度，但是要直接测定这些样品中的痕量组分却很难，这是因为，一方面，样品本身的物理化学状态有的不适合直接测定，或组分的含量低于分析方法的灵敏度；另一方面是存在基体干扰。

Saline water and foraminifer are enriched in 7Li, and marine biogenetic carbonates are depleted in 7Li.

其中较小的δ^7Li值见于海相生物碳酸盐样品，较大的δ^7Li值见于某些盐湖卤水以及有孔虫的样品。

To evaluate the bioactivity of the glass-ceramics,the specimens were soaked in the simulated body fluid. The results indicate that fluorapatite shows needle-like microstructure, which is similar to that in human bone and teeth. The formation of needle-like fluorapatite is related to the heat treatment procedure, which results in needle-like fluorapatite crystals by accelerating one-dimension growth along the c-axis through the screw dislocation growth mechanism. The mechanical properties of the glass-ceramics are close to those of the human bone and teeth. The bioactivity test results show that apatite layer is precipitated on the materials surface after 3 d immersion in SBF, which indicates the glass-ceramics have a good bioactivity.

研究结果表明：氟磷灰石相呈针状，与人体骨和牙齿的磷灰石形貌相似，有利于提高材料的生物活性和生物相容性；氟磷灰石的形成是材料被迅速加热至高温进行热处理，使磷灰石以螺旋位错生长机制沿c轴晶化长大所致；经热处理获得的材料具有优良的力学性能，基本满足骨科和齿科用生物材料的性能要求；材料在体外模拟体液中浸泡3 d后，样品表面已有磷灰石层生成，表明该材料具有较高的生物活性。

The processing conditions of extraction of Sargassum fusiforme polysaccharide were optimized. Ten samples were gained by separation, purification and hydrolysis of SFPS and their biological activities were further studied in the paper.

并通过对羊栖菜粗多糖进行分离、纯化和水解获得10个样品，对其中部分样品进行了较为深入的生物活性研究。

In addition, the in vitro bioactivity of the glasses was tested by immersion in simul...

浸泡三天后所有样品表面都被羟基磷灰石覆盖，表明了样品具有良好的生物活性。

The epidemiological investigation of the field suggested that there may have an infectious virus unit at least, in 96L air by threshing machine and 350L air by the nest of A. agrarius , respectively.

对现场采集的空气样品和收集的打谷者佩戴的口罩样品的研究发现，在稻田堆放的稻捆根部和鼠栖息的草窝的空气中每 35 0L空气中和打谷场脱粒机附近每 96L空气中，含有至少一个具有生物活性的汉坦病毒粒子。

We also for the first time compared the the storage stability of the allylamine plasma samples in the different mediums , including the hydrophilicity and biocompatibility, and the results indicated the samples had good stability in the different mediums.

同时还首次比较了丙烯胺等离子体修饰样品在多种不同介质中的储存稳定性，包括亲水性和生物相容性，结果显示样品在不同介质中均有较好的稳定性。

It was found that these as-prepared MgO materials replicated the biomorph of pinewood, and their frameworks were constructed by plenty of claviform nanoparticles with a similar sectional area, which were different from those of MgO prepared by directly thermal decomposition of MgO precursor.

结果表明，用该方法制备出来的MgO样品具有松木的生物形态，由横截面积比较均一的棒状纳米颗粒构成，不同于乙酸镁直接焙烧得到的MgO样品。

The activities of nitrosification and anaerobic ammonium oxidation of both activated sludge and biofilm also were studied. Results showed that the nitrosification rate of activated sludge was 2.89 times than biofilm. AOB was the dominate bacteria in activated sludge.

单级自养脱氮系统中的活性污泥及生物膜样品均具有亚硝化活性，其中活性污泥最大比氨氧化速率为0.234mgN/mgVSS·d，生物膜为0.081mgN/mgVSS·d，活性污泥亚硝化活性是生物膜的2.89倍左右。

BQJ-34 was cultured on the biotin fermentation media for 48 hour ,a 10ml fluid medium was boiled for an hour and was centrifuged (10,000r/min , 30 min), the supernatant is filleted with the 0.22μm filters and the biotin content of filter liquid is detected by RP-HPLC based on the biological samples regression analysis, recovery, accuracy testing.

利用生物素培养基对菌株BQJ-34进行振荡培养，取48h的细菌培养液10ml置100℃条件下水浴1 h，随后在超速离心机上以10 000 r/min，30 min离心，取上清液用0.22μm滤膜过滤，用高效液相检测滤液中的生物素含量，并通过对生物素样品的回归分析和回收率、精密度试验，最终确定利用反相高效液相色谱法可用于培养液中生物素测定，其最佳检测条件是：用安捷伦Zorbax SB-C18(4.6~※250cm，5μm)色谱柱，以K_2HPO_4(0.04mol，pH2.5)和CH_3CN(二者体积比为91.5：8.5)为流动相，紫外检测波长为215nm。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐