铜基合金中硅、铝、铁、镍的发射光谱定量分析

电机轴瓦用的含镍铜合金材料,其大致组成为铜80％、铅7％、锌3％、锡8％、镍1％、硅、铝、铁0.005％左右。欲分析其中的硅、铝、铁、镍,在缺乏合适的标样情况下,我们通过条件试验,提出了一个以铜、铅、锌、锡的氧化物为基体,应用石墨电极小孔粉末法进行测定的方法。对方法的准确度和再现性的考查以及实际分析的检验,证明该方法对于铜基合金中硅、铝、铁、镍的分析均有实用性。方法相对标准偏差为6～12％。     

不锈钢中镍含量的三种测定方法比较

本文比较了不锈钢中镍含量的三种测定方法：丁二酮肟光度法、丁二酮肟重量法和火焰原子吸收光度法。结果显示,丁二酮肟光度法的回收率约为98．7％,RSD为4．36％,丁二酮肟重量法的回收率约为97．0％,RSD为11．74％,火焰原子吸收方法的回收率约为99．7％,RSD为1．32％,由此可见,火焰原子吸收方法测量不锈钢中的镍准确度、精密度最高。     

金属锂中痕量杂质铜、镍、锰、锌、镉、钴、铅的螯合树脂分离—原子吸收测定

报道了一个金属锂中痕量杂质铜、镍、锰、锌、镉、钴、铅的分析方法。本法用501螯合树脂分离主体和杂质,而后用原子吸收光谱法测定。方法回收率为95～100％。相对标准偏差对铅为4.3％,对其它六元素为1.1～2.2％。方法简便、准确、灵敏。     

高频红外碳硫分析仪快速测定电解二氧化锰中硫含量

采用高频红外碳硫分析仪快速测定电解二氧化锰中硫含量方法简便、快速环保、结果准确,试验结果表明:方法检出限为0.0012％,相对标准偏差4.53％,加标回收率在94.1％～104.9％之间,2个样品检测值与《碱性锌-二氧化锰电池用电解二氧化锰》(QB/T 2629—2021)硫酸钡重量法比较相对偏差分别为-1.70％和-...     

电感耦合等离子体发射光谱法测定镝铁合金中非稀土杂质

采用电感耦合等离子体原子发射光谱法( ICP - AES)测定镝铁合金中非稀土杂质.并用基体匹配法及氟化分离法以消除干扰.测定范围为AI、Si:0.020％～0.10％；Ca,,Mg,Ni:0.0050％～0.050％；Mo,W:0.030％～0.20％.对样品测定11次,得到相对标准偏差为0.75％～4.95％,加标回收率为97.5％～104％.方法可用于镝铁合金中非稀土杂质的测定.     

高频感应炉红外吸收法测定氧化亚镍中的硫

本文主要研究高频感应炉红外吸收法测定氧化亚镍中硫的方法，确定了助熔剂种类及其用量。该方法简单、快速、准确，结果令人满意。与碘量法进行了对照试验，测定0．041％的硫量时该方法法的相对标准偏差为3％，碘量法为9％。     

磁性优良的半工艺型无取向电工钢板的生产方法

1 专利申请范围以重量％计:C≤0.06％、Si≤3.0％、Mn为0.1～1.5％、P≤0.1％、S≤0.015％、Al≤0.30％、N≤0.0040％、B为0.0015～0.0040％,其余为Fe及杂质组成的无取向电工热轧钢板,经冷轧、连续退火,随后以大于40℃/s的冷却速度从780～650℃快速冷却至300℃以下,再经调质轧制。这是一种以此为特征的磁性优良的半工艺型无取向电工钢板的生产方法。以重量％计:C<0.06％、Si≤3.0％、Mn为0.1～1.5％、P≤0.10％、S≤0.015％、Al≤0.30％、N≤0.0040％、B为0.0015～0.0040％,其余为Fe及杂质组成的无取向电工热轧钢板,经冷轧、连续退火后,以不     

钒钛磁铁矿中钛、钒、磷、钴、镍的测定

采用HF—HNO3-HClO4-HCl溶样,直接在电感耦合等离子体原子发射全谱直读光谱仪测定钒钛磁铁矿中的钛、钒、磷、钴、镍,选用元素最佳分析谱线和仪器合适的工作条件进行测定,共存元素之间的干扰很小,测定值相对标准偏差小于2％,方法检出限为钛0．04％、钒0．001％、磷0．02％、钴0．001％、镍0．001％,方法精密度（RSD,n=12）为钛小于3．0％,钒小于2．0％,磷小于29％,钴小于3．0％,镍小于4．0％。通过国家一级标准物质GBW07224、GBW07227测试和其他样品不同仪器测定比较,测定结果相一致,分析方法快速简便,分析结果准确。     

高效液相色谱法测定镀锌板中多溴联苯

本方法是用高效液相色谱法测定镀锌板中多臭联苯.该方法是用ZORBAX Extend-C18液相色谱柱（150 mm ×4.6 mm i.d.,5μm）,开始以90％A泵＋10％B泵组成洗脱,保持15 min;再以0.5％ B/min减量至成为100％A泵＋0％B泵的组成,保持至出峰完.最后以1％ B/min增量至为95％A泵＋5％B泵的组成,保持10 min,使流动相组成恒定,为下一次进样准备好条件,流速为0.8 mL/min,波长为226 nm下进行检测.该方法可用于测定镀锌板中多臭联苯,具有快速简便、准确可靠的特点.     

顶空气相色谱法测定水中苯系物

利用HP-FFAP毛细管柱分离苯系物,项空气相色谱法测定水中苯系物.讨论了顶空试样体积、平衡温度、平衡时间、氯化钠用量等因素对测定的影响.该方法实现了水中苯、甲苯、乙苯、对二甲苯、间二甲苯、邻二甲苯、苯乙烯等各组分的完全分离,方法的检出限在1.3 ～1.6 μg/L,RSD为1.57％ ～2.35％ （n =6）,加标回收率为99.0％ ～102％（n=6）.本方法可用水中苯系物的测定.     

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。     

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。     

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.     

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。     

Comparison of the results of surgical and conservative treatment of fractures of the diaphysis of the tibia

In this paper is treated the fundamental problematic of the fracture of the diaphysis of the tibia and the therapeutic results after the conservative and operative treatment are confronted. Among 518 patients with 433 open fractures and 35 with closed fractures of the diaphysis of the tibia, successful treatment of more 2/3 was obtained in the period from 1968 to 1972. Following our casuistics and literature, whose results are similar, we find out that the average total treatment of the osteosynthesis of the fracture of the diaphysis was shortened for 2,5 months depending upon the type and the localisation of the fracture. Apolied methods of the operative and conservative and conservative treatment in relation to the velocity of the medical cure as well as to the extreme anatomical-functional results are analised. We noticed that osteosynthesis, made by the intermedullary nail and the extension of the canals or by a small AO table, by the achieved stability makes conditions of immediate motions and an early rehabilitation. Because of that it gives the best functional results.