青海道帏地区1∶5万水系沉积物测量研究

通过开展青海道帏区域810 km21∶5万水系沉积物测量工作,揭示本区域相关元素地球化学特征,研究显示:工作区水系沉积物中相对于地壳丰度元素含量偏高的元素有As、Sb、Bi、Pb、Sn、W等,同时Au、Ag、Hg、Sb、As、Bi、Pb等元素具备强分异能力,W、Mo具备一定分异能力。研究区内存在26个地球化学异常,其中乙2类异常存在6处。根据其地球化学特征,对其异常进行解释推断。从地球化学角度优选出相关矿产的找矿靶区,服务于后续地质矿产调查评价工作。     

豫西龙门店银矿K9矿体原生晕特征及深部预测

对龙门店银矿K9矿体Au、Ag、Cu、Pb、Zn、W、Mo、Hg、As、Sb、Bi等11种指示元素进行了统计学分析,研究矿体的原生晕特征。结果表明,区内可能经历了多期岩浆活动,成矿过程复杂,Pb、Zn可作为矿体深部预测的重要指示元素。计算得到矿体自上而下的轴向分带序列为WMo-Au-Hg-Cu-As-Bi-Zn-Ag-Sb-Pb,尾晕元素W、Mo位于分带序列的最上部,Hg、Sb、As与W、Mo、Bi元素相互叠加,有明显的反分带现象,认为矿体向下有较大延伸,推测在960m以下沿矿体侧伏方向仍有较大的找矿潜力。     

胶东山后金矿床构造地球化学特征及找矿意义

对胶东招平断裂上的山后金矿34个钻孔进行了原生晕测量,分析了Au、Ag、Cu、Pb、Zn、As、Sb、Bi、Mo、Hg等10种元素,统计了微量元素含量及变化。在招平断裂蚀变带中Au、Ag、Pb、Mo、Bi等元素出现了明显富集,而Cu、Zn、Sb、Hg等元素没有富集,山后金矿多金属硫化物阶段不发育;根据聚类分析结果,Au与Ag、Cu、Pb、Zn生成于不同的成矿期,招平断裂中的Au矿体形成于金成矿期,招平断裂上盘荆山群地层中的Au、Ag、Cu、Pb、Zn多金属矿体形成于金银多金属成矿期;根据主矿体微量元素轴向分带特征,认为山后金矿深部还有较大的找矿前景。     

乡城地区水系沉积物地球化学特征及找矿靶区研究

通过对乡城地区16个元素水系沉积物测量地球化学特征研究表明:贫乏元素有Hg;正常元素有Zn、Mn、Ni、Cu、Au、Pb、Co、Mo、TFe;较高背景元素有As、Ag、W、Bi、Sb、Sn。据元素空间分布研究和对主要异常进行推断解释,总结了构造、岩性、岩浆岩及蚀变为其控矿因素,指出NNW向构造、喇嘛垭组地层、晚印支期、晚燕山期及其复式岩体有关的地区是寻找Cu、Pb、Zn、Au、Ag、W、Sn等多金属矿的有利地区,圈出了9个找矿靶区。     

胶东招平断裂带金矿成矿指示元素特征及找矿应用

对招平断裂带上的大尹格庄、夏甸、山后、大磨曲家等金矿进行了矿体原生晕测量,分析了Au、Ag、Cu、Pb、Zn、As、Sb、Bi、Mo、Hg 等10 种元素,统计了微量元素含量和相关系数。与金相关的元素中,As 在每个矿床均出现;Ag、Pb、Cu、Sb 在大部分矿床出现;Mo、Bi、Zn 只在个别矿床出现。前缘晕元素As是最好的成矿指示元素,可以用As 的含量结合其他元素异常开展地球化学深部预测。划分了As、Au 元素强弱异常标准,As 元素含量大于4×10-6 为强异常,1.5×10-6~4×10-6 为中等异常,小于1.5×10-6 为弱异常;金元素含量大于35×10-9 为强异常,10×10-9~35×10-9 为中等异常,小于10×10-9 为弱异常。总结了深部地球化学预测的3 种准则,经矿区实际验证预测效果较好。     

吉林敦化松江河金矿区地球化学特征

松江河金矿区地球化异常显著。1∶5万水系沉积物测量,发育有Au、Zn、Bi、Pb等元素异常,其中Au元素异常面积16 km2,峰值24×10-9,平均值5.5×10-9,衬度10,NAP值37;1∶1万土壤测量,异常元素有Au、Ag、Cu、Sb、Pb、As等,其中Au元素异常面积达0.217 8 km2,浓度分带明显,峰值253.4×10-9,平均值为29.7×10-9,异常下限3.66×10-9,平均衬度8.11,最大衬度69.23,NAP值1.767;原生晕测量,元素组合分带明显,前缘晕指示元素有Pb、As、Hg,中间成矿元素为Au、Ag、Cu,尾晕元素有W等。矿区地球化学异常特征也是重要的地球化学找矿标志。     

阿里河地区钼多金属元素地球化学特征及典型矿床成因分析

阿里河地区位于大兴安岭北段,近年来发现了许多重要的找矿线索,取得了较好的找矿效果。研究表明,该区Bi和Pb两种元素具明显富集趋势,Ag、Mo等元素具有较高的变异系数,Au、Pb、Mo成矿有利度高,为本区最有利的成矿元素。嘎仙蛇绿构造混杂岩岩块为区内最为成矿有利部位,主成矿元素为Pb、Zn,Ag、As、Cd、W、V、Cu为指示元素。Mo在子区9和子区10中异常明显,也具有较大的成矿潜力。应重点在嘎仙沟、大坑河和西陵梯一带,开展大比例尺的土壤地球化学测量工作,圈定出赋矿地段,实现找矿突破。     

土壤地球化学测量在永新金矿勘查中的应用及找矿效果研究

永新金矿床是黑龙江省多宝山外围地区近年来新发现的浅成低温热液型矿床,目前矿床规模已接近大型。在该矿床的发现及评价过程中,土壤地球化学测量工作起到了重要作用。研究表明,该矿床具有明显的土壤地球化学异常,1/5万土壤异常的元素组合主要为Au、Ag和Bi,其中,Au异常面积达1.5 km2。1/ 1万土壤异常分带现象明显,元素组合为Au、Ag、As、Sb、Bi、Cu、Pb、Zn、Mo和W,其中Au元素异常最大值为191.910-9,平均值为26.310-9。金矿化蚀变带的赋存部位、展布方向、规模产状与各元素的异常特征一致,其中As、Sb、Pb和Zn等元素主异常位于金矿化蚀变带的上盘;Mo和Bi等元素主异常位于金矿化蚀变带的下盘;Au、Ag和W元素主异常与金矿化蚀变带出露位置相吻合。     

胶西北前孙家—洼孙家断裂带构造地球化学找矿预测

马虎沟测区位于灵北断裂带下盘,区内主干断裂为前孙家—洼孙家断裂,发育似斑状郭家岭型花岗闪长岩和玲珑型片麻状黑云母花岗岩。本次地表构造地球化学测量范围约15 km2,采集构造地球化学样品共858件,测试元素包括Au、Ni、Pb、Co、Mo、Sn、Zn、Ti、Cr、As、Sb、Hg、Ag、Cu、Ba、Bi、B、Mn、V等19种。Au元素异常沿前孙家—洼孙家断裂带及次级断裂分布特征明显。分形分维统计表明,Au具有多阶段成矿的特征。结合多元统计分析,厘定本测区构造地球化学异常找矿标志为Au-Pb-Bi元素组合异常及因子得分Y(i,2)和Y(i,3)异常。结合地质分析,圈定找矿靶区5处。     

辽宁铁岭夹河厂地区水系沉积物测量地球化学特征及找矿方向

在1∶5万水系沉积物测量的基础上,对辽宁省铁岭市东南部夹河厂地区的地球化学特征进行了初步分析,发现夹河厂地区以Au、Ag异常为主,伴生有Pb、Hg、Bi、As、W等多元素异常。对元素分布特征、相关性分析、单元素异常特征等进行了探讨,综合分析认为Au、Ag、Pb为区内具有一定找矿潜力的元素。依据水系沉积物异常的解释推断,结合区内成矿地质构造背景,进而划分出夹河厂金矿、沔阳沟金矿、大碾子沟金矿及昂帮河铅银多金属矿找矿远景区。     

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.