锇

The interactions of dsDNA and ssDNA with two osmium complexes have been studied by surface electrochemical methods based on DNA modified electrode. It is found that both osmium complexes bond DNA with electrostatic interaction. And some thermodynamics and kinetics constants, such as bindind constant , ratio of binding constants K〓/K〓, limiting ratio K〓°/K〓°at zero ionic strength (μ＝0), free energy ΔG〓, dissociation rate constant k and binding site size s have been obtained.

研究发现两种锇配合物都是通过静电作用与DNA结合，并计算得到联吡啶锇和二氯菲咯啉锇与dsDNA和ssDNA相互作用的结合常数、结合常数比K〓／K〓、μ＝0时极限结合常数比K〓°／K〓°、结合自由能ΔG〓、解离速度常数k和结合位点数s等多个热力学和动力学参数。

It is found that the sample stained with silver methenamine instead of mercaptoacetic acid-osmium can prevent the false phenomena caused by the inappropriate use of mercaptoacetic acid.

摘 要：本文将六亚甲四胺银染色法作为加工毛发的电子染色剂得到较好的电子显微图像，并系统地比较了用巯基乙酸-锇法染色的羊毛样品和用六亚甲四胺银染色的人发样品的超微结构，认为对深加工过的毛发样品用六亚甲四胺银法替代巯基乙酸-锇法染角蛋白，可以防止巯基乙酸使用不当引起的假象。

The conditions of separation of noble metals from residual solution of Os and Ru of the osmiridium with congo red associate forming resin have been studied.

主要研究了从锇铱矿的锇钌蒸残液中通过刚果红离子缔合型负载形成树脂分离贵贱金属的条件。

But, the powdery osmium, gradually will be oxidized under the normal temperature, and production perosmic anhydride.

可是，粉末状的锇，在常温下就会逐渐被氧化，并且生成四氧化锇。

"We found that if we combine boron with osmium, we push the osmium atoms apart by only 10 percent from where they were in osmium metal, which is very good; you want to push them apart as little as possible," Kaner said.

我们发现，如果我们把硼和锇结合在一起，我们只能使锇金属中锇原子的分隔距离扩大10%，这已经非常不错了；如果你想尽可能地缩小原子之间的分隔距离，就需要寻找更好的过渡金属。

Of, relating to, or containing osmium, especially in a compound with a valence of4 or a valence higher than that in a comparable osmous compound.

锇的，四价锇的锇的、与锇有关的或含有锇的，尤指在化合价为4或化合价高于相对低价锇的化合价的化合物中的锇

A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum,rhodium,and other metals,used in needles and wearing points.

铱锇矿一种矿石，是少量铂、铑及其他金属矿石的铱锇的自然合金，用于制造针头和耐磨尖端

A mineral that is a natural alloy of osmium and iridium with small inclusions of platinum, rhodium, and other metals, used in needles and wearing points.

铱锇矿一种矿石，是少量铂、铑及其他金属矿石的铱锇的自然合金，用于制造针头和耐磨尖端注意，注意力集中

Although osmiophillic layers also developed between spermatocyte and gametophytes, they were interrupted by pores for substance and signal exchanges.

尽管精母细胞之间也有嗜锇层的形成，但嗜锇层是不连续的，其上有一些空隙，精母细胞之间可通过空隙进行物质和信息的交流。

During the investigation of the reactivity of O_SCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2 and O_SCl_2(PPh_3)_2CH=C(PPh_3C(=CH_2)CH=CH2, several stable osmacycles with novel structure, such as osmabenzenes, osmafurans, osmacycles containing intramolecular-coordinated allene, intramolecular-coordination osmacycles containing osmacarbene, an osmacyclopentadiene, were isolated during the investigation of the reactivity of O_SCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2 and O_SCl_2(PPh_3)_2-CH=C(PPh_3C(=CH_2)CH=CH_2.In addition, some convenient and efficient methods to prepare these osmacycles were developed.

首先，合成出两种具有反应活性的金属杂五元环IC配合物OsCl_2(PPh_3)_2CH=C(PPh_3CHCH=CH_2和OsCl_2(PPh_3)_2CH=C(PPh_3C(=CH_2)-CH=CH_2，并对它们进行了系统表征；进而，研究了这些活性五元配合物的反应性，合成出多种稳定的锇杂环配合物，其中包括锇苯、锇呋喃、含配位联烯的锇杂IC环化合化物、含锇卡宾的IC环化物、首例锇杂环戊二烯化合物等多元化的产物。

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。