高炉渣中二氧化钛测定方法的研究

研究应用二安替吡啉甲烷光度法测定高炉渣中二氧化钛含量，方法快速准确，操作简便，用于高炉渣中二氧化钛的日常检测，可获得满意结果。     

二安替吡啉甲烷分光光度法测定高炉渣中二氧化钛的方法

样品用快熔剂熔融,用确定好的分析条件,加入二安替吡啉甲烷显色进行分光光度分析,可以测定高炉渣中二氧化钛含量,结果与标准值基本一致。     

提高测定钛白粉中二氧化钛含量准确度的方法研究

通过二氧化钛颜料GB/T 1706-2006国标中铝还原-硫酸铁铵滴定法,对钛白粉中二氧化钛含量的多次分析,发现采用国标方法测定钛白粉中二氧化钛含量的准确度不高,通过实验总结出了提高钛白粉中二氧化钛含量分析准确度的方法。     

EDTA滴定法测定炉渣中氧化镁含量的不确定度评定

对EDTA溶液络合滴定法测定炉渣中氧化镁含量的不确定度的产生原因进行了分析,并对一个高炉渣中氧化镁含量测定结果的不确定度进行了评定.     

EDTA溶液络合滴定法测定炉渣中氧化钙含量的不确定度评定

对EDTA溶液络合滴定法测定炉渣中氧化钙含量的不确定度的产生原因进行了分析,并对一个高炉渣中氧化钙含量测定结果的不确定度进行了评定.     

磺基水杨酸分光光度法测定高炉渣中氧化亚铁含量的不确定度评定

对磺基水杨酸分光光度法测定炉渣中氧化亚铁含量的不确定度的产生原因进行了分析,并对一个高炉渣中氧化亚铁含量测定结果的不确定度进行了评定.     

铬天青S分光光度法测定炉渣中三氧化二铝含量的不确定度评定

对铬天青S分光光度法测定高炉渣中三氧化二铝含量的不确定度的产生原因进行了分析,并对一个高炉渣中三氧化二铝含量测定结果的不确定度进行了评定.     

氧化亚氮-乙炔火焰原子吸收光谱法测定钒钛高炉渣中二氧化钛

钒钛高炉渣具有反应活性差、样品溶解困难的特点,采用硫酸-硝酸-氢氟酸三元混酸体系(体积比为1∶2.5∶1)在90~100℃温度下加热溶解钒钛高炉渣样品。为避免钛离子水解,用盐酸调节溶液酸度为1.0mol/L,并以氯化钾抑制高温下钛的电离,建立了氧化亚氮-乙炔火焰原子吸收光谱法测定钒钛高炉渣中二氧化钛的方法。实验对溶解方法及测定条件进行了优化。结果表明,钛的质量浓度在4~30μg/mL范围内符合朗伯-比尔定律,线性相关系数为0.999 1,方法检出限为1.7mg/g。将实验方法应用于钒钛高炉渣标准物质和实际样品中二氧化钛的测定,测得结果与认定值基本一致,相对标准偏差(n=5)小于0.4%。     

燃烧碘量法测定高炉渣中硫含量的不确定度评定

根据不确定度的来源及产生原理,构建数学模型,对燃烧碘量法测定高炉渣中硫量的测定结果的不确定度进行评定,与实际应用相吻合.所构建的数学模型及评定方法,对容量法测定物质含量过程中不确定度的评定具有很强的通用性.     

钒钛铁精矿中铁钛关系的研究

通过对攀西地区和攀枝花矿区的矿石和钛磁铁矿本身性质的分析研究，指出钒钛铁精矿中的二氧化钛含量的高低是由钛磁铁矿中含钛矿物的多少决定的，用目前的机械物理选矿的方法不可能达到降低钒钛铁精矿中二氧化钛含量的目的，提出了降低入炉铁精矿中二氧化钛含量的途径。     

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)     

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.     

Quality of life of relatives of mental patients

Usage of quality of life of psychiatric patients' relatives as the parameter of estimation of the quality of psychiatric care is considered. By means of standard questionnaire elaborated by the authors as well as by means of both individual and group conversations the quality of life was analyzed in 40 relatives which lived together with psychiatric patients. Different spheres of their life and difficulties (financial, social-psychologic, production) were examined in families with such patients. The defects of psychiatric care that had direct influence on the quality of life of the psychiatric patients' relatives are outlined.