碳粒

The method uses the measurement results by an Aethalometer, an Optical Particle Counter and an Integrating Nephelometer to revise the aerodynamic sizing of aerosol particle measured by 3321 in Xiamen. The comparisons with other instruments show that the method is satisfactory.

该方法根据黑碳仪、浊度计和光学粒子计数器的测量结果，对气溶胶折射率进行反演，再利用反演的折射率结合黑碳仪和浊度计的测量结果对厦门地区空气动力学粒度仪(3321)测量的空气动力学粒径数据进行光学修正，与光学粒子计数器测量结果对比表明修正的结果是合理的。

The preparation method is characterized in that:(1) at minus 10 DEG C to 10 DEG C, a chloroauric acid solution with a certain concentration is added into a nano-Pt/C catalyst by ultrasonic or stirring mixture and the atomic ratio of Pt to Au is controlled between 18:1 and 5:1;(2) a small amount of monohydric alcohol or dihydric alcohol or trihydric alcohol of C1-C3 is added and is stirred at minus 10 DEG C to 10 DEG C for 10 min to 5h, so as to prepare the carbon-loading Pt-Au bimetallic nano electro-catalyst;(3) if necessary, the catalyst obtained by the step (2) is treated for 0.5 to 4h at high temperature ranging from 100 DEG C to 700 DEG C in the inert or reducing atmosphere, so as to adjust and control the grain size of the Pt-Au bimetallic nano electro-catalyst.

本发明涉及了一种高稳定性碳载Pt-Au双金属纳米电催化剂的制备方法，其特征在于：(1)在-10～10℃中，将一定浓度氯金酸溶液加入到纳米Pt/C催化剂中经超声或搅拌混合，控制Pt∶Au的原子比为18∶1-5∶1；(2)添加少量C 1 -C 3 的一元、二元或三元醇类，在-10～10℃下搅拌10min-5h，制备了碳载铂金双金属纳米电催化剂；(3)视需要，可将步骤(2)得到的催化剂在惰性气氛或还原气氛中经100～700℃高温处理0.5-4h，可调控Pt-Au/C双金属纳米催化剂的粒径。

In joins in the cobaltous acetate resultant besides nano-carbonball, has tubular of matter the minority head harness metal. Adds response the formic acid nickel to be possible to obtain the particle size comparatively greatly to have the carbon-encapsulated. The Co3B obtained resultant shape not to be more irregular also to have the carbon-encapsulated.

当加入醋酸钴反应时，产物中除奈米碳球外，还具有少数头戴金属钴之管状物质；而加甲酸镍时，则可得到较大粒径具有包覆现象之奈米碳球；然而加入硼化钴所得反应产物形状较不规则且具有包覆之奈米颗粒。

Pt nano particles decorated with nafion ionomers were synthesized and used as electrocatalyst in proton exchange membrane fuel celldue to plentiful proton channels provided by the enwrapping polymers.Then decorated Pt particles were deposited on carbon nanotubes,which enwind each other into interconnect nets and form the framework of the catalyst layer for PEM fuel cell.

介绍了Nafion聚合物作为修饰离子，合成具有原位质子导电能力的纳米Pt颗粒；TEM分析显示Pt颗粒的平均粒径为4nm，颗粒之间界限明显，分散状态良好；将这种离子导体修饰的纳米Pt沉积到纳米碳管表面作为质子交换膜燃料电池催化电极，纳米碳管相互缠绕在催化层形成交联的电子通道。

Drug sensitive test and three-dimensional test220 strains of Pa were isolated from hospitalized patients between 2003 and 2007. K-B method was used to tested the susceptibility of 10 different antibiotics. IRPa was screened by testing the minimal inhibitory concentration of imipemem by using agar diluiion method.The susceptibility of these IRPa to the antibiotics was analysised. Three-dimensional test was used to identify the different kinds of beta lactamases from 220 strains of Pa.2.Carbarpenems hydrolytic enzyme genes and oprD2 gene were detectedamong the selected IRPa strains, PCR method was performed to detect carbapenemase genes which included GES、KPC、SPM、VIM、IMP、GIM gene and the oprD2 gene;Multiplex PCR were used to detect OXA genes and plasmid-mediated AmpC beta lactamase genes; The expression of the chromosomal AmpC beta lactamases and oprD2 genes in IRPa strains were analyzed by Real-time PCR.3.Identification and characterization of integronsIntegrase gene was detected by PCR, and the classification of integrons was performed by using restriction fragment length polymorphism.PCR was performed to detect the qacE△1-sull gene,and the gene cassetes which are located at variable region of integrons in the strains were detected to be positive.

方法1、药敏实验和三维实验收集2003～2007年临床分离的220株Pa，对这些菌株采用K-B法测定10种临床常用抗生素的药敏情况，同时采用琼脂稀释法检测亚胺培南的最低抑菌浓度(Minimal inhibitory concentration，MIC)，筛选出对亚胺培南耐药的铜绿假单胞菌，并分析其对其它抗生素的药物敏感率；采用三维实验的方法分析220株Pa产β内酰胺酶的类型。2、碳青霉烯类水解酶和oprD2蛋白的检测针对鉴定的IRPa菌株，采用普通PCR方法检测具有碳青霉烯水解作用的β内酰胺酶耐药基因(GES、KPC、SPM、VIM、IMP、GIM基因)和oprD2基因，采用多重PCR的方法检测OXA型基因和质粒携带的AmpC酶基因，用荧光定量RT-PCR方法检测oprD2蛋白基因表达情况；同时对产AmpC酶的Pa(25株，含IMP耐药和敏感株)用RT-PCR方法检测AmpC酶基因的表达量情况。3。

In this case, the solidification of the liquid phase formed at the hipping temperature led to the formation of crystalline intergranular phases at all temperatures: however, the chemical compositions of the intergranular phases formed in the specimens with and without carbon additions were different, since for high carbon contents the resulting intergranular phase was observed to be richer in Yttrium(85% at Y/15% at Si).

在这种情况下，加压温度下液态产物的凝固在所有温度范围下都将生成间粒晶体：但是，是否添加了碳则将会使产物晶体的化学成分发生不同，因为在高碳含量下，产物晶体会更富含钇(85%Y比15%Si)另一方面，我们必须强调的时，如果Al2O3作为第三方物质加入反应混合物粉末中，那么产物晶体的结晶度将被破坏。

There was enrichment of the heavier isotope of mesoplankton with increasing grain size, showing carbon isotope enrichment along trophic levels.

中型浮游动物随粒径的增大，其δ13C值增大，显示出营养层次的碳同位素富集作用，但不同粒级组分相互间δ13C值也存在着相当程度的重叠，实际上这也是其生物组分有重叠的反映。

The influence of light stabilizing agents, antioxidant agents, colour masterbatch and filler of CaCO 3 on ageing behavior of speciality was studied by artificial accelerated ageing tests of carbon arc lamp and fluorescent UV-B type light.

选择国产基础树脂与稳定剂，采用碳弧灯和B型荧光紫外灯人工加速老化试验，研究了光稳定剂品种、用量、与抗氧剂的复配及色母粒、重钙母粒对专用料老化性能的影响。

In this paper, a total of 56 relatively nonpoint source pollution sediment samples were collected from the tidal flats of the Jiuduansha shoal and the Chongming island of the Yangtze river estuary. The main properties i. e., grain size distribution, contents of DCB (dithionite citrate bicarbonate extracted iron Fe(subscript d, AAO extracted iron Fe(subscript o, total Fe, DCB extracted Mn Mn(subscript d, total Mn, organic matter, magnetic susceptibility of the samples, as well as the concentrations of Cu, Zn, Pb, Cr, Cd and Ni in the samples, were determined. Basing on the data, the relation of the sediment properties to heavy metal concentrations was evaluated with pearson's rank and partial rank correlation analysis.

采集长江口无明显点源污染的崇明东滩和九段沙潮滩56个沉积物样品，测定沉积物原样和粘粒中Cu，Zn，Pb，Cr，Cd和Ni的含量以及沉积物的主要性状（粒径分布、游离铁、活性铁、总铁、游离锰、总锰、有机碳和磁化率等），以相关分析和偏相关分析研究沉积物中重金属含量与沉积物主要性质之间的关系。

In this study,additives were used to con-trol the size and shape of CaCO3.Needle,sphere,short chain and hexangular plate likenanometer CaCO3were synthesized by introducing CO2to lime suspension under opti-mum condition.

采用鼓泡碳化法，在最佳反应温度、反应物浓度、气体流量的条件下，考察了不同添加剂对产物形状及粒径大小的影响，得到了粒径小于100 nm且分散性能良好的球状、针状、短链状及六角板状纳米碳酸钙。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。