钼铁中Mo,Si,Cu的X射线荧光光谱分析

钼铁合金是冶炼结构钢等合金材料必不可少的添加剂,钼铁需分析Ｍｏ,Ｓｉ,Ｃｕ等元素,用化学法分析步骤十分繁琐,为了便于分析,我们探索了用改造后的日本岛津ＶＸＱ—１５０Ａ型Ｘ射线荧光光谱仪和最新数据处理系统ＤＰ一２１０Ｅ软件,合理选择分析条件［１,２］,对上述元素用粉末压片制样进行分析,分析结果准确且稳定。１实验部分１．１仪器及测定条件Ｘ射线荧光光谱仪：日本岛津ＶＸＱ—１５０多道Ｘ射线荧光谱仪,铑靶端窗式Ｘ射线管;数据处理系统：ＨＰＶＥＲＴＲＡＶＥ型计算机,数据处理系统ＤＰ—２１０Ｅ软件,ＥＰＳＯＮ…     

碳素铬铁合金的X射线荧光光谱分析

碳素铬铁合金的Ｘ射线荧光光谱分析龙姝军,田凡（锦州铁合金厂,锦州,１２１００５）（辽宁省石油化工学校化工科,１２１００１）碳素铬铁合金是冶炼不锈钢等合金材料必不可少的添加剂,我厂生产的碳素铬铁合金需分析Ｃｒ,Ｓｉ,Ｐ,Ｍｎ,Ｃ,Ｓ等元素。Ｃｒ,Ｓｉ,...     

原子发射光谱法测定钢中微量钙

用光电直读光谱仪分析钢中的钙,可以满足炉前分析对快速、准确的要求。通过实验,总结出了一套用光电直读光谱仪,同时分析钢中的钙及Ｃ、Ｓｉ、Ｍｎ 、Ｐ、Ｓ、Ｃｕ 等元素的方法,其测量精密度、检测限及分析速度完全可以满足炉前分析的要求     

PW1606多道X射线光谱仪在高炉生铁快速分析中的应用

介绍ＰＷ１６０６多道ｘ射线荧光分析仪在高炉生产线上测定生铁中Ｓｉ，Ｍｎ，Ｐ，Ｓ，Ｖ，Ｔｉ，Ｃｒ，Ｎｉ，Ｃｕ等微量元素的快速定量分析。文中对影响准确性的背景，谱线重叠和基体的吸收增强效应用ＰＨ模式进行了校正。并比较了ＸＲＦ结果与化学保证值，其偏差符合分析公差要求。该方法已应用于高炉生产过程的质量控制。     

X射线荧光光谱法测定烧结矿中Fe,Al,Ca,Mg,Si,S,Mn,P

烧结矿是高炉冶炼的重要原料之一 ,准确快速分析烧结矿中主、次量元素 ,对于指导烧结矿及高炉生产具有重要意义。由于烧结矿日常分析元素较多 ,采用化学分析方法 ,分析时间长 ,手续繁琐。本文利用多道同步Ｘ射线荧光光谱仪 ,合理选择分析及制样条件 ,对烧结矿中主、次量元素进行分析。结果表明 :该法分析速度快、准确度高 ,完全满足日常分析的要求。1　实验部分1 1　仪器及工作条件Ｓｉｍｕｌｔｉｘ 1 1型Ｘ射线荧光光谱仪 (日本理学 ) ,盘式振动磨 (ＷＣ材质 ) ,5 0ｔ油压机。工作条件 :Ｘ光管 ( 4 0ｋＶ - 2 5ｍＡ) ,Ｐ1 0气体流量 2 5ｍ…     

X荧光玻璃熔片法测定铁矿石

使用无水四硼酸锂（Ｌｉ２Ｂ４Ｏ７）作为熔剂,在１０５０℃熔融制样,以Ｘ荧光光谱法测定铁矿石中Ｆｅ、Ｓｉ、Ａｌ、Ｃａ、Ｍｇ、Ｍｎ、Ｔｉ、Ｐ、Ｓ等主次量元素,分析方法具有较高的精密度和准确度。     

保护渣的X射线荧光光谱分析

保护渣采用熔融法制样，用Ｘ射线荧光光谱仪对保护中ＣａＯ，ＳｉＯ２，ＴＦｅ，ＭｇＯ，Ａｌ２Ｏ３，ＭｎＯ进行定量分析，建立每个成分的工作曲线，并对６个成分进行基体校正回归计算，此方法的建立与应用可减轻用化学法分析的劳动强度，提高分析速度和工作效率。     

钢渣中TFe,SiO2,CaO等的x射线荧光分析

本文叙述了钢渣中主要成份ＴＦｅ、ＳｉＯ２、ＣａＯ、ＭｎＯ、Ｐ２Ｏ５的ＸＲＦ快速测定方法。被测试样采用粉末压片法，利用国家标准样品和内控标样制作工作曲线，采用经验系数法校正元素间的干扰－基体效应。     

石灰石,石灰中多元素的X射线荧光光谱法测定

采用粉末压片法,利用日本理学Ｓｉｍｕｌｔｉｘ １１型Ｘ射线荧光光谱仪代替化学分析法测定石灰石、石灰中的多种元素,制样简单,分析速度快,精度和准确度都较高。     

X射线荧光光谱法测定工具钢中各成份

传统的湿法化学分析,对合金元素的定量分析技术是很成熟的,准确度好。但难以做到快速分析。采用Ｘ射线荧光（ＸＲＦ）光谱分析法能一次快速测定工具钢中十多种元素,均能满足分析要求［１］。１实验部分１．１谱仪硬件采用飞利浦ＰＷ／１４０４型顺序扫描式全自动Ｘ射线荧光光谱仪;铑靶Ｘ射线管,最高电压６０ｋＶ,最大电流８０ｍＡ,配有流气正比计数器（ＦＬ）和闪烁计数器（ＳＣ）两种,也可以做联合探测（Ｆ＋Ｓ）;分光晶体有ＬｉＦ２００,ＬｉＦ２２０,Ｔ１ＡＰ,Ｇｅ和ＰＥ等。１．２Ｘ４０分析软件包Ｘ４０软件包共有ＤＪ,Ｌ…     

转炉炉壳热应力分析

根据实际转炉建立实体模型。以有限元为手段,考虑了炉衬和炉壳材料的物性参数随温度变化的特点和炉衬与炉壳之间膨胀间隙,计算了转炉炉壳在温度载荷和炉衬膨胀压力同时作用下的热应力。所得结果可为转炉炉壳设计提供依据。     

焦炭热性能指标意义浅析

通过对焦炭在高炉内的历程及其变化规律的剖析,阐述焦炭热性能指标的意义,形象地把焦炭在高炉内的损耗分为三部分(M1,M2,M3)。指出M2对焦比及焦炭价格有一定的指导作用。     

Results of treatment of cancer of the cardia

Cancer of the cardia is traditionally discussed with cardiac cancer of the lower portion of the esophagus and upper gastric cancer invading the esophagus, and the specific characteristics of cancer of the cardia have never been clearly defined. We reviewed the outcome of 172 patients with adenocarcinoma of the cardia who had undergone radical surgery between 1949 and 1994 in the Division of Gastrointestinal Surgery of the Cancer Institute Hospital. The centers of the tumors were located within 2 cm above and below the boundary between the esophagus and the stomach, and their longitudinal diameter was less than 8 cm. We divided the patients into an early period (1949-1979; n = 79) and a late period (1980-1994; n = 93), and focused on the historical transition. There were no differences in patient gender or histology between the two periods. However, the late period was associated with fewer cases of esophageal invasion and shorter longitudinal diameter, as the age of the population advanced. The number of advanced cancers such as the localized and infiltrative type had decreased, and early cancer and early clinical stage had become more common, but despite the fact that the number of early cancers had increased, extended dissection, such as thoracic and paraaortic lymph node dissection, was performed more frequently. By clinical stage, the long-term outcome markedly improved in Stage I patient in the late period, and tended to improve in Stage II and III patients. This appears to have been attributable to the prevention of micrometastasis by extended dissection, although the number of early cancers is another major potential cause. There were no differences in the outcome of Stage IV patients between the two periods, and further advances in multimodality therapy must be awaited. The range of resection is basically proximal gastrectomy, and if there are adequate indications, the prognosis is favorable. In view of the status of lymphatic flow and lymph node metastasis, and long-term results, lateroaortic lymph node dissection is important. Since the number of early cancer patients has been increasing, if intraabdominal recurrence is prevented, intrathoracic lymph node dissection will contribute greatly to the outcome of such patients.     

The effect of amount of possession of the trait of hostility on accuracy of perception of hostility in others.

Some theories of personality hold that an individual's perception of others is influenced by his own personality characteristics; more specifically, that a trait of low social value will be projected more into others, and that insight into the possession of these characteristics reduces this distortion. These 2 hypotheses were tested by having a group of college students rate each other (including themselves) on degree of friendliness or hostility. Agreement with group rating about self yielded the insight score. In general, the hypotheses were supported; the "friendly" Ss were most accurate in their perception of others, and insight was positively associated with accurate perception. From Psyc Abstracts 36:04:4HL16M. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Comparison of rates of infection of two methods of emergency ventricular drainage

The rates of infection of two methods of external ventricular drainage in use at Atkinson Morley's Hospital--namely, (a) percutaneous drainage with Rickham reservoirs and (b) tunnelled ventriculostomies--were compared in this retrospective review. Percutaneous drainage of CSF with Rickham reservoirs was associated with a 27% rate of infection as identified by positive microbiological cultures; tunnelled ventriculostomy catheters had a 10% infection rate. The difference in the infection rate between the two methods was statistically significant (P < 0.015). Other variables examined, including the age and sex of the patients and the reasons for ventricular drainage, were not associated with an increased rate of infection. Most infections from either method were caused by a coagulase negative staphylococcus. The average duration of ventricular drainage before identification of positive cultures was 5.7 days for Rickham reservoirs and 6.0 days for ventriculostomies.     

浅析《野草》的版画特征

鲁迅先生一生热爱美术作品,对版画中木刻兴趣尤甚.<野草>作为其"写心之作",亦呈现出一些与木刻版画一致的审美特征:一是具有木刻版画的色彩特征,多对比、多冷色,有阴郁的美感;二是具有木刻版画的力度特征,环境描写、人物刻画处处刀锋毕现,遒劲有力,有一种"力之美".     

四辊破碎机车刀架的改造

针对四辊破碎机车刀架车削中存在的几个问题,详细介绍了电动车刀架的结构和工作原理,建立主要设计参数的数学表达式,并进行适当的分析。改造后,这种电动车刀架运行平稳、可靠、方便、省力,取得了预期的效果。     

Effect of antibiotics of chemotaxis of human leukocytes

The effect of 20 different antibiotics on chemotaxis by human neutrophils was studied. Human leukocytes incubated with chloramphenicol, rifampin, sodium fusidate, and tetracyclines in vitro showed markedly depressed migration. The mechanisms by which these antibiotics affect leukotaxis are discussed.