同质

The 329 bp terminal inverted repeat sequence can't form the conserved fold-back secondary structure as that of many Streptomyces linear replicons. Lacking of typical Streptomyces tap/tpg locus for te-lomere replication, pPR2.3c encodes a protein with two domains resembling the telomere associated protein of Strepto-myces and helicase of Haemophilus respectively. No typical Streptomyces iteron-rep locus for replication from the cen-trally located origin, two DNA fragments containing almost all pPR2 were cloned and introduced by transformation into S.

其端粒末端反向重复序列的长度为329 bp，不能像多数链霉菌的线型质粒那样能形成保守的&折返&的二级结构。pPR2虽然没有参与链霉菌端粒复制的保守的tap/tpg基因，但是pPR2.3c基因编码了一个双结构域蛋白，分别同链霉菌的端粒复制相关蛋白Tap和嗜血杆菌的解旋酶具有相似性。pPR2缺少典型的链霉菌重复序列-复制基因区段，将几乎覆盖全长pPR2的两段DNA进行克隆后，不能转化变铅青链霉菌。

State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, ChinaStrontium and barium in otoliths are mainly from ambient water where fish survives.

鱼耳石中元素锶和钡主要来源于鱼类生存的水体，这两种元素通过腮或肠进入内耳淋巴液，继而以类质同象的方式沉淀在耳石晶格内部空位和晶格间隙中。

Although same belongs to front delta facies zone, and the foregoing reasons, the north depositional system controlled areas sediment smaller grain size, mostly siltstone, shaly siltstone (or a variety of calcium-pelitic siltstone) and mudstone portfolio, and there are lots of ostracods in these lithology, some ostracods formed stratigraphy, and north-west of the lithology of depositional systems is correspondingly more coarse, coarse pebbly, coarse sandstone and fine sandstone, and so on.

虽然同属三角洲前缘相带，但由于前述原因，造成北部沉积体系控制的地区沉积物粒度较细，多为粉砂岩、泥质粉砂岩和泥岩组合，且上述各种岩性中介形虫含量特别多、还有部分成层介形虫；而西北沉积体系控制的沉积物的岩性则相应粗得多，甚至有很多井钻遇砾岩、含砾粗砂岩、粗砂岩等粒度较粗的岩性。

However, because S is more easily combined with Fe than As does, hence when hydrothermal fluids are rich in S, the possibility of As presence in pyrite crystal lattice decreased, but the chance for Co and Ni to substitute Fe in pyrite crystal lattice increased, thus S rich is not favorable for the formation of P type of pyrite.

但另一方面，由于S与As相比更易与Fe结合，因而成矿介质中富S将使As进入黄铁矿晶格中的能力或几率降低，并进一步使Co、Ni因补偿类质同像进入黄铁矿晶格中代替Fe的能力或几率增大，反而不利于形成P型黄铁矿。

We introduce a new and special class of quasi-hereditary algebras A_q, and prove the Hemmer-Nakano equivalences for them provided that q is sufficiently large.

此外，通过研究A_q的拟遗传子代数和拟遗传商代数的同调性(来源：2a06Aa0BC论文网www.abclunwen.com)质，我们证明了一类广义Schur代数具有双中心化性质。

Kinetics constant Km of crude laccase and laccase-isoform during the culture of wood scraps, corn stalks and straw stalks the three solid states was studied.

在木屑、玉米秆和稻草秆三种固体秸秆基质上分泌漆酶活性、漆酶动力学参数米氏常数Km和漆酶同工酶的动态变化。

For dissociation of c-C2H4S+ in a region 10.6?{11.8 eV, branching ratios and average releases of kinetic energy in channels of formation of c-C2H4S+, CH3CS+ and HCS+ were obtained from well-resolved coincidence mass spectra.

我们由环硫乙烯在光能量范围10.6-11.8 eV的同现质谱谱线的面积和半高宽，得到c-C2H4S+、CH3CS+和HCS+在各个光能量的分枝比和释放的平均动能。

The experimental research was mainly carried out in a rolling test facility at atmospheric pressure and temperature, and the test section was glass tube, through which the air and water co-current flow and form different flow patterns.

实验研究主要是在常温常压下的摇摆台架上进行，试验段为透明的有机玻璃管，空气和水作为流动工质同向通过试验段形成不同形状的流型。

METHODS: Human AMSCs were isolated in vitro sterilely. At the third passage, 0.5 mL single cell suspension at 1×109/L was obtained and transplanted by tail venous pathway in transplantation group mice, Mice in the control group were injected with an equal volume of saline. APP-gene mice in the normal group were left intact. 5'-bromo-2-deoxyuridine labeled third-generation AMSCs expression was detected in mice brain tissue by immunohistochemical method.

无菌条件下体外分离培养人羊膜间充质干细胞，传至第3代将细胞浓度调整为1×109 L-1，经尾静脉注入0.5 mL至细胞移植组转APP+基因小鼠体内；对照组经尾静脉注入同体积的生理盐水；正常组转APP-基因小鼠不给予任何干预措施。

The traveller from the coast, who, after plodding northward for a score of miles over calcareous downs and corn-lands, suddenly reaches the verge of one of these escarpments, is surprised and delighted to behold, extended like a map beneath him, a country differing absolutely from that which he has passed through.

那个从海岸走来的游客，向北面跋涉了二十几英里的路程，才走完白垩质的草原和麦地。他突然走到一处悬崖的山脊上，看见一片田野就像一幅地图铺展在下面，同他刚才走过的地方决然不同、不禁又惊又喜。

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。