铂

Lanthanides belong to the sixth cycle of the periodic table Ⅲ B family, are all solid metal, they are La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, holmium, erbium, thulium, ytterbium, and lutetium were 15 kinds of metals and their periphery are two layers of electronic 5d16s2, while the peripheral third layer f orbital but never zero to 14, so the external electronic structure of 4f0-145d16s2, and therefore these elements in oxidation number are to 3, very close chemical properties, extraction, when it is difficult to separate them they are mostly multi-element mineral mix, more difficult to increase refining, and their atomic number of 57-71, one by one to increase the number of protons the nucleus, and thus extranuclear electron of gravity is also growing, so that atomic radius decreases with increasing atomic number Z, which makes lanthanides contraction, ionic radius is also reduced, which also makes Zr, Hf, Nb and Ta, Mo and W, the atom and ionic radius very close to each other they also determine a similar nature, resulting in difficult separation, also the tribe Ⅷ of the fifth cycle, ruthenium, rhodium, palladium, and the sixth cycle, osmium, iridium, platinum is very similar in nature, thus The six elements, said platinum group elements.

镧系元素属于周期表第六周期中ⅢB族，全部是固体金属，它们是镧、铈、镨、钕、钷、钐、铕、钆、铽、镝、钬、铒、铥、镱和镥共十五种金属元素，它们的外围两层的电子均是5d16s2，而外围第三层的f轨道电子却从零增加到14个，所以外围电子结构为4f0－145d16s2，而使这些元素氧化数均为＋3，化学性质极为接近，提炼时很难分开，它们的矿石又大多是多种元素混在一起的，更增加提纯难度，它们的原子序数为57－71，核内质子数逐个增加，因而对核外电子引力也不断增强，使原子半径随原子序数Z增加而减小，这就使镧系元素收缩、离子半径也缩小，这也使得Zr和Hf，Nb和Ta、Mo和W等原子和离子半径都很接近、也决定了它们彼此性质类似，以致难以分离、也使第Ⅷ族中第五周期的钌、铑、钯和第六周期的锇、铱、铂在性质上极为相似，因而称这六个元素为铂系元素。

The catalytic combustion of hydrogen cyanide was studied separately in presence of two kinds of noble metal catalysts,i.

考察了一元铂与二元铂铑两种贵金属催化剂对氰化氢的催化燃烧效果，探讨了温度、氰化氢浓度、空气含量及气体空速等因素对脱除氰化氢的影响。

Survivin gene RNAi can increase cell apoptosis induced by cisplatin and enhance its inhibitive efficiency.

Survivin基因RNAi可增加顺铂化疗诱导的细胞凋亡，增强顺铂化疗对细胞的生长抑制。

The international primary standard for the kilogram is made of 90% platinum, 10% iridium.

重量和长度的国际标准原型用90%的铂，10%的铱制成。76.7%铂与23.3%钴的合金是已知最强的永久磁体。

The products were well dispersed and the HRTEM images of the small particles presented clear lattice fringes with the interfringe distance measured to be 0.23nm, which well corresponds to the lattice spacing of the {111} plane.

使用温和的柠檬酸钠为还原剂用热化学的方法制备铂纳米粒子，所得产品的TEM照片表明其具有良好的分散性，对产品进行HRTEM测试，发现小颗粒具有清晰的晶格条纹，晶面间距为0.23nm，与铂的{111}面数据吻合。

According to the mineralization of Cu-Ni and Pt-Pd deposit, Cu-Ni sulphides were formed by liquation in the late phase of fractional crystallization of magma chamber, and the Pt-Pd mineralization mainly occurred on the process of fluid action after diagenetic stage.

就铜镍和铂钯矿化而言，铜镍硫化物形成于岩浆房分离结晶晚期的熔离作用，而铂钯矿化则主要在成岩期后流体作用阶段形成。

Procedure: Use concentrated hydrochloric acid to clean a platinum / nichrome wire.Then put the wire to dip some solid sample.

步骤： 用浓氢氯酸去清洗一铂线/镍铬线，再用铂条去沾起一些固体样本。

After tiny amount of platinum was deposited onto the NPG substrate,not only the structure stability of NPG was greatly improved,but also the Pt-Au bimetallic catalysts displayed the better catalytic activity and the stronger poison resistance towards the electrooxidation of small or...

如在NPG基体再沉积微量的铂，不仅明显改善了NPG的结构稳定性，而且由于Pt、Au两组分之间的协同效应而使该催化剂对有机小分子的电催化氧化具有比纯铂更高的催化活性和更强的抗催化毒物能力。

A heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium.

一种重而脆的铂属金属元素，用于制合金，与铂或锇形成天然合金。

The phyllite, gold-bearing untramylonite and gold-bearing quartz-vein of PEG geochemistry partition mode are Pt-Pd type.

铂族元素地球化学研究表明，千枚岩、超糜棱岩、含金石英脉铂族元素CI球粒陨石标准化分配模式属于Pt-Pd型。

Since historical times,England ,where the early inhabitants were Celts, has been conquered three times .

从有历史以来，英国，在此地早期居住的是凯尔特人，已经被征服了三次。

Bluetooth OBEX File Transfer Enables the sending and receiving of files on your phone via Bluetooth.

蓝牙OBEX文件移动允许经过蓝牙传送和接受文件。。。。