碳硫光电分析仪-非水滴定法测定硅酸盐中CO_2含量

将碳硫光电分析仪应用在非水滴定法测定硅酸盐中CO_2的过程中,使滴定终点更加明显。通过对选用的国家一级标准物质测定,得到方法的相对误差0.86%~7.4%和相对标准偏差2.3%~7.9%,符合地质矿产实验室测试质量管理规范"DZ/T0130—2006"中对准确度和精密度的要求。

快速粮食成分光电分析仪研制成功

《粮食与食品工业》讯：由中科院长春光机与物理研究所陈星旦院士课题组研制的快速粮食成分光电分析仪已通过专家鉴定。该仪器在粮食收购、仓储、加工和销售行业具有很好的市场前景。它可以快速测定玉米中的水分、粗蛋白、粗脂肪、粗淀粉等主要成分的含量，测定的相对误差小于5％，

DLY-95光电颗粒分析仪研制

运用重力沉降浑匀消光理论，建立了颗粒测试的数学计算模型及多通道采集数据的方法；研制出ＤＬＹ９５光电颗粒分析仪器．

光电微量氧分析仪的改进

简要介绍光电微量氧分析仪的改进。通过仪表几个重要特性的试验数据，概述黄磷反应室三种结构对氧与黄磷反应的影响，并就其反应机理作了理论分析。通过试验数据论证了设计改进的Ｌ—３型反应室结构克服了原黄磷反应室的不足，具有最佳的测氧精度与线性度，从而使黄磷发光法的技术特性大为提高。

DLY-95A型光电颗粒分析仪推广应用可行性分析

按照《河流泥沙颗粒分析规程》及《水文测验规范补充规定》等要求,采用标准吸管分析法,对DLY-95A型光电颗粒分析仪进行了比测试验,其结果符合规范精度要求,仪器准确性与稳定性好,具有推广应用价值。

光电比色多元素分析仪校准方法

探讨了光电比色多元素分析仪的计量特性和校准方法,确定了校准项目和技术指标。在含量不大于1.0%时含量示值误差的绝对值不大于0.05%,含量大于1.0%时含量相对示值误差的绝对值不大于5%;重复性:不大于5%;线性系数:大于0.99。用该拟定校准方法对光电比色多元素分析仪的计量校准结果进行分析,结果表明该方法可行。

我国自行研制的粮食成分光电快速分析仪通过专家鉴定

近日，我国自行研制生产的粮食成分光电快速分析仪在长春光机所通过专家鉴定。专家们认为，该近红外粮食成分快速分析仪性能稳定，分析精度高，各项性能指标均达到了国际同类产品水平并且具有我国自主知识产权，完全可以替代同类型进口仪器，对我国粮食收购、仓储、加工和销售具有重要意义。

DLY-2000A光电颗粒分析仪测量结果反映悬沙磨圆度探讨

天然的沙都是不规则的,而目前的测量手段基本都是把天然沙当作圆球来处理,天然悬移质在经过河道、水库以后,沙的形状发生了变化,本文通过长江上游天然河流、库区站、水库坝下三个站的悬沙颗粒级配探讨,反映出了悬沙经过水流的长时间冲刷后,形状发生的变化进行探讨。

铅基合金光电直读光谱分析探讨

对直读光谱仪检测铅基蓄电池板栅合金样品时，同一材料同一样品的检测结果所存在的差异和波动以及应如何控制和统一进行了研究探讨。笔者认为，如果能在不同的实验室，不同的操作者之间，在分析用标准样品及操作技术上取得统一和共识，这些差异和波动可望大为改观，而逐渐达到理想的效果。

血栓弹力图与光电比浊法检测氯吡格雷抗血小板功能

目的采用血栓弹力图分析仪（thrombelastography，TEG）和光电比浊法血小板聚集分析仪（light transmission ag-gregometry，LTA）检测氯吡格雷抗血小板功能并分析两种方法的优缺点。方法①用随机数字表法选取2011年3～7月在解放军总医院住院及门诊的急性冠状动脉综合征（acute coronary syndrome，ACS）患者48例（包括不稳定型心绞痛、ST段抬高型心肌梗死、非ST段抬高型心肌梗死患者）。男性32例，女性16例，年龄73岁（62～90）岁。②患者入院时均先顿服阿司匹林160mg和氯吡格雷300mg，之后用氯吡格雷75mg／d的维持量治疗9个月后，在某次服药后2h抽取静脉血。③同时进行LTA和TEG检测，分别得到服药后的二磷酸腺苷（adenosine diphosphate，ADP）诱导的血小板聚集率（用AD-PLTA-INDU表示）、血小板聚集抑制率（用ADPTEG-INHI表示）。所有志恳者均签署了知情同意，该研究获得医院伦理委员会批准。结果48例观察对象均进入结果分析，ADPLTA-INDU值，41例分布在40％～80％（85．4％），7例〉80％（14．6％），CV值：0．19；ADPTEG-INHI值，40例分布在10％～60％（83．3％），2例〈10％（4．2％），6例〉60％（12．5％），CV值：0．54；48例观察对象的（ADPLTA-INDu＋ADPTEG-INHI）趋向一个常数（Mean=98％，SD=12．1），各值与Mean做成组数据配对t检验（P双尾〉0．05）。ADPLTA-INDU值和ADPTEG-INHI值呈负相关（r=一0．75，P〈0．01）。结论氯吡格雷抗血小板功能较温和，且两种方法存在同一性效用，但TEG精密度较低。

光电比浊法血小板聚集仪与流式细胞仪检测氯吡格雷药效

目的：采用二磷酸腺苷（adenosine phosphate，ADP）诱导光电比浊法血小板聚集分析仪（light transmittance aggre-gometry，LTA）试验与流式细胞仪（flow cytometry，FC）血小板膜糖蛋白分子 PAC-1（Fg，Ca2＋，GPⅡb／Ⅲa 形成复合物的受体）、CD62p（P 选择素）活性百分数实验检测氯吡格雷的抗血小板聚集效果。方法①用随机数字表法收集解放军总医院住院的2011年6月～2012年3月急性冠状动脉综合征（acute coronary syndrome，ACS）术后患者71例（包括不稳定型心绞痛、ST 段抬高型心肌梗死、非 ST 段抬高型心肌梗死患者）。男性46例，女性25例，平均年龄69岁（57～92岁）。②患者入院时均先顿服阿司匹林160 mg 和氯吡格雷300 mg，之后用氯吡格雷75 mg／d 的维持量治疗6个月后，在某次停药10天后，于服药前、服药后2 h 采集其前臂静脉血。③同时进行 LTA 和 FC 检测，分别得到 ADP 诱导的患者服药前、后LTA 检测的血小板聚集率及药物抑制率（分别用 ADPLTA服药前、ADPLTA服药后、ADPLTA-INDU表示）；FC 检测的 PAC-1活性百分数及药物抑制率（分别用 PAC-1服药前、PAC-1服药后、PAC-1 INHI 表示），CD62p 活性百分数及药物抑制率（分别用 CD62p服药前、CD62p服药后、CD62pINHI表示）。所有参与实验者均签署了知情同意，该研究获得医院伦理委员会批准。结果①71例观察对象均进入结果分析。②ADPLTA服药前值分布在0％～97％（73.5±13.7）％，ADPLTA 服药后值分布在12％～97％（63.6±16.2）％，两者进行成组数据配对样本 t 检验（t ＝－2.082，P ＝0.041）；PAC-1服药前值分布在15.1％～78.9％（49.8±17.8）％，PAC-1服药后值分布在14.5％～78.3％（47.9±17.1）％，两者进行成组数据配对样本 t 检验（t＝3.663，P ＜0.01）；CD62p服药前值分布在1.5％～80.8％（10.9±9.8）％，CD62p服药后值分布在1.4％～41.4％（9.3±6.7）％，两者进行成组数据配对样本 t 检验（t ＝2.082，P ＝0.041）。③ ADPLTA-INDU 值分布在0％～28.2％（13.8±13.9）％，PAC-1 INHI 值分布在0.6％～9.1％（3.7±3.8）％，CD62pINHI值分布在0.1％～48.5％（15.0±32.3）％，三者两两之间采用积矩相关系数（Pear-son 相关系数）判别：ADPLTA-INDU 与 PAC-1 INHI （r＝0.297，P ＝0.012），ADPLTA-INDU与 CD62pINHI （r＝0.220，P ＝0.065），PAC-1 INHI与 CD62pINHI （r＝0.736，P ＜0.001）。结论FC 检测的氯吡格雷药物抑制率与 LTA 的相应值相关性不好，FC 并不适用于血小板聚集功能的临床常规检测，但可作为科学研究及常规结果的辅助性确认方法。

XPS Analysis of Surface and Interface States for PTC DA/ p-Si Heterojunction

The surface and interface of heterojunction (HJ) formed with organic semiconductor (3,4,9,10-perylenetetracarboxylic dianhydride (PTCDA)) and inorganic semiconductor p-Si were measured and analyzed by X-ray photoelectron spectroscopy (XPS).The results indicate that, in PTCDA molecule,the binding energy ( E b) of C is 284.6 eV and 288.3 eV, corresponding to C of the perylene and C of the anhydride, respectively, and the binding energy of O is 531.3 eV and 531.1 eV, corresponding to C of C=O in the anhydrides and C of C-O-C, respectively. Moreover, PTCDA lost its anhydrides and only its perylenes were left in the HJ interface.

Research on Preparation of the Composite Materials LiFePO4-Li3V2（PO4）3

The article developed a lithium iron phosphate - composite cathode material of lithium vanadium phosphate. Using X-ray diffraction （XRD）, electronic scanning electron microscopy surface （SEM）, laser particle size analyzer, carbon and sulfur analyzer, and X-ray photoelectron spectroscopy, etc. for the prepared composites were characterized and found the material is mainly crystalline structure of lithium iron phosphate, and lithium vanadium, wherein a small amount of impurities; finer particle size of the material, the particle size distribution is narrow and uniform, smooth particle surface, wrapping in good carbon composite with other materials prepared in comparison the case has a carbon content of about optimum conductivity. To assemble the material into a cell after the 0.1C, IC, 2C when and 5C, the first discharge capacity were 160,145,127 and 109 mA·h·g^-1, after 50 cycles, the discharge capacity of 162, respectively, 144,126 and 106 mA·h·g^-1, which showed good rate characteristics and cycle characteristics.

Study on Tribology Performance of Different Lubricant Additives under Atmospheric Pressure and High Vacuum Conditions

By using PAO-10 as the base oil, the tribological behavior of 11 additives under high vacuum condition was evaluated. By adopting some surface analytical instruments, such as scanning electron microscopy(SEM), energy dispersive spectroscopy(EDS) and X-ray photoelectron spectroscopy(XPS), the tribological mechanisms of these additives were studied. In air, O_2 can react with metal to form metal oxide that can protect the surfaces of rubbing pair during the tribological tests. According to the theory of the competitive adsorption, the function of some active elements is weakened. In a vacuum environment, the additives contributed more to the lubrication performance. The sulfur-containing additives could react with Fe to produce Fe Sx and "M—C" bonds("M" represents metal). They both had contributions to the lubrication. As for the phosphorus-containing additives, they only generated the phosphates during the tests. When the sulfur and phosphorus-containing additives were applied, the generated phosphates and Fe Sx had the primary contribution to the lubrication performance during the tests.

A novel microwave absorber——BaAl_2Fe_(10)O_(19)/poly(m-toluidine) composite:Preparation and electromagnetic properties

BaFe10A12O19/poly（m-toluidine） （BFA/PMT） composites were synthesized by in-situ polymerization of m-toluidine in the presence of BaFe10Al2O19 particles. The structure, composition and morphology of the obtained samples were characterized by using XRD, FT-IR, UV-visible spectroscopy, SEM and TEM techniques. Their electrical conductivity, magnetic property and microwave absorbing property were measured by the four-probe meter, the vibrating sample magnetometer and the vector network analyzer, respectively. The results indicated that BFA particles were coated effectively by PMT polymer and some interactions between PMT and BFA particles existing in the composites. The conductivity of BFA/PMT composite is smaller than that of pure polymers and its saturation magnetization is a little smaller than that of pure BFA. The influence of the constitution and film thickness of absorbent on its microwave absorbing property is evident. The microwave absorbing properties of the BFA/PMT composites are better than those of pure BFA and PMT. When optimizing the mass rate of BFA/PMT to 0.3, the absorbent with 2 mm film thickness has the minimum reflection loss of -28.26 dB at approximate 14.24 GHz, and the maximum available bandwidth of 8.8 GHz, respectively. The results show that these composites can be used as advancing absorption and shielding materials due to their favorable microwave absorbing property.

The influence of Zr substitution for Nb on the corrosion behaviors of the Ni-Nb-Zr bulk metallic glasses

The influence of Zr content on corrosion behaviors of the Ni61.5Nb 38.5xZrx(x=1,3,5,7,9 at.%) bulk metallic glasses(BMGs) in 1 M HCl aqueous solution was investigated by potentiodynamic polarization measurements and X-ray photo-electron spectroscopy(XPS).It was found that these BMG alloys possess superior corrosion resistance,that is,with large passive region of about 1.5 V and low passive current density(as low as 0.05 Am-2 for Ni61.5Nb31.5Zr7).XPS analysis indicates that the high corrosion resistance is attributed to the formation of Nb-and Zr-enriched surface films formed in the aggressive acid solution.The Zr substitution for Nb effectively reduces the Ni content,particularly the metallic state Ni content in the surface films,which depresses the electrical conduction of the surface films and reduces the passive current density,thus leading to the enhancement of the corrosion resistance of these Ni-Nb-Zr BMGs.These alloys may potentially be useful for engineering applications.