铂饰品中Pt, Pd, Au, Ag, Cu, Ni, Zn, Fe的测定

试验研究建立了同一试料溶液连续、同时测定铂饰品中各成分的分析方法。主体Pt以氯铂酸铵称量法及火焰原子吸收光谱(FAAS)法或电感耦合等离子发射光谱(ICP-AES)法测定滤液中残留Pt进行补差而测定。主成分Pd,Au,Ag,Cu和焊料成分Ni,Zn,Fe以FAAS法或ICP-AES法测定。其方法回收率分别为:Pt99.9%~100%;Pd99.3%~99.7%;Au99.5%~l01.5%;Ag98.0%~100%;Cu97.7%~99.3%;Zn98.0%~99.0%;Ni94.0%~105%;Fe95.0%~99.0%。实际试样分析时,各成分质量分数之和一般在99.12%~l01.2%之间,接近于100%,间接说明方法的可靠性。本法适用于Pt-Pd二元体系和Pt-Pd-Au-Cu多元复杂体系的铂饰品的破坏分析,可用于校正X荧光光谱法无损检测铂饰品的分析结果。     

硫脲介质ICP-OES测定多金属矿石中的银铝铋钴铜铁锰镍铅锑钛锌

建立了混合酸体系预处理试样,电感耦合等离子体发射光谱法(ICP-OES)测定多金属矿石中共生(伴生)具有综合回收价值元素的方法。试样经氢氟酸、硝酸、高氯酸消解,盐酸浸取,硫脲络合后,用ICP-OES同时测定矿石中Ag、Al、Bi、Cu、Co、Fe、Mn、Ni、Pb、Sb、Ti、Zn 12种元素,采用Thermo Scientific i TEVA ICP软件,在Subarray谱图扣除可能的背景及元素之间的谱线重叠干扰。实验结果表明,除Al、Fe外,各元素的检出限为1.13~6.20μg/g,测定结果的精密度(RSD)均小于10%。经国家一级多金属矿石标准物质验证,测定结果与标准推荐值吻合。     

原子荧光光谱法测定土壤中的铅、铬、镉、汞、砷、锌、铜、镍等元素研究

土壤无机污染物铅、铬、镉、汞、砷、锌、铜、镍这八大重金属,是一般土壤检测中的必检项目。金属元素在土壤中积累富集后,有可能通过雨水迁移,造成地下水,地表水污染,或者通过农作物进入食物链,进而影响食品安全和人体健康,因此,对这些元素的检测显得尤为重要。本文采用原子荧光光谱法对土壤中的金属元素进行测量,同时结合微波消解技术对样品进行处理,确保测量数据的准确性。     

ICP-AES法测定铍铜合金中Be, Ni, Ti, Co, Fe, Al, Si, Mg和Pb

通过操作条件的试验研究，用基体匹配法校正基体干扰，并选择了最佳工作条件。样品加标回收率为96％～110％，方法快速、简便、可靠，适用于铍铜合金的快速检验。     

ICP-AES法测定硅铁中锰、磷、铝、钙、铬、镍、铜

以电感耦合等离子体光谱法(ICP-AES)直接同时进行硅铁中Mn、P、Al、Ca、Cr、Ni、Cu的测定，提出了：试样溶解的方法、元素的干扰情况、元素分析谱线的最佳选择和背景校正的最佳方法。优化了仪器工作条件，综合确定了最佳试验条件。结果表明，该法准确、快速、简便，精密度、回收率、标准样品分析对照均取得了满意的结果。     

电感耦合等离子体原子发射光谱法测定镍基合金中钨、钼、钴、铝、钛、铌、铁元素

针对镍基合金的溶解方法、元素分析谱线的选择、仪器分析参数的优化、内标溶液的选用、基体元素的影响、干扰元素的校正及消除方法等进行了研究,确定了最佳试验条件;试验结果表明:检出限为0.024mg/L～0.85mg/L;加标回收率为97.1%～105.7%;方法的精密度(RSD,n=11)小于1.0%,本试验测定结果与标钢认定值和湿法分析结果做对照,都在允许偏差范围内,表明此方法精密度好,准确度高。     

Radioimmunoassay, its value in clinical use: LH, FSH, progesterone, estrone, estradiol, estriol

The clinical value of hormone determinations and functional tests is presented. In regard to cyclical disruptions, foremost the anovulatory cycle with secondary amenorrhea primarily in mind, the important evaluation is that of the estrogen-gestagen test, followed by a determination of the plasma gonadotropins. For ovarian insufficiency, differential diagnosis between the hypothalamus, hypophysis, or disruptions in the feedback systems are most important. The clomisphene test is the primary means of radioimmunological evaluation of amenorrhea. This test enables one to determine which of the 3 functions above are showing a negative response to chemical stimuli. These tests are of great value in diagnostics and are also useful in evaluating the effectiveness of therapy. The main polemic is over whether it is most useful to evaluate the total estsrogens or the individual fractions. The same problem exists for progesterone. The main indication for the determination of total estogens, or fractions of estrone, estradiol, as well as progesterone is developmental control of medical ovulation release. The therapy of sterility cases also falls into this category. The exact determination of estrogen contents is not always possible, however, making reliability questionable. But the varied nature of their functions and the cost factors involved must remain important in evaluating them.     

The septum: Neural systems involved in eating, drinking, irritability, muricide, copulation, and activity in rats.

Measured eating, drinking, irritability, muricide, and copulation in 45 male albino Wistar rats before and after 1 of 3 coronal knife cuts in the septal region or a control operation. Activity was also measured postoperatively in the 3 experiments. Cuts posteroventral to the septum resulted in slight hypophagia, marked hyperdipsia, irritability, asexuality, and decrease in activity. Cuts of the fornix resulted only in slight decrease in activity. Cuts through the anterior septum resulted in irritability, slight hyposexuality, and slight decrease in activity. No significant correlations between the various behavioral effects were found. It is suggested that the neural pathways mediating eating, drinking, irritability, muricide, copulation, and activity are relatively distinct and that neural activity in the septal region probably does not influence behavior in any unitary fashion. (42 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

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…     

Ethical supervision in teaching, research, practice, and administration.

Supervision is a specialized area of psychological activity that has its own foundation of knowledge, skills, and attitudes, which are enhanced by training. As our discipline develops its standards for competent practice in supervision, there is a need to develop ethical guidelines to assist both supervisors and supervisees in maintaining productive working relationships. Organized around the hierarchy of ethical principles comprising the Canadian Code of Ethics for Psychologists, the Canadian Psychological Association adopted Ethical Guidelines for Supervision in Psychology: Teaching, Research, Practice, and Administration in early 2009. In this article, each of the four ethical principles (Respect for the Dignity of Persons, Responsible Caring, Integrity in Relationships, and Responsibility to Society) is examined in the context of supervision within the areas of teaching, research, practice, and administration. The history of the guidelines, as well as some of their innovative and unique elements, is also discussed. (PsycINFO Database Record (c) 2011 APA, all rights reserved)     

ICP—OES法测定铝铁中的铝锰硅磷铜铁含量

用稀王水溶解试样,ICP—OES法直接测定铝铁中的铝、锰、硅、磷、铜、铁的含量。对样品溶解酸度、元素谱线选择、背景校正扣除、样品基体及待测元素间干扰等因素进行了试验研究。采用基体匹配与背景扣除法消除基体对待测元素的光谱干扰,确定了最佳实验条件。结果表明：各元素的加标回收率为96．0％～105．0％,相对标准偏差小于2．50％。本法与化学分析方法对照,测定结果一致,已用于铝铁产品的检验。     

Cholesterol in beef, pork, chicken and their products commercialized in Maringá, Paraná, Brazil

It has been previously shown that ondansetron, a 5-HT3 antagonist, can ameliorate vertigo in patients with acute brainstem disorders. A coincidental benefit was the improvement of cerebellar tremor in some patients with both vertigo and tremor. To further evaluate this effect, a placebo controlled, double blind, crossover study was conducted of a single dose of intravenous ondansetron in 20 patients with cerebellar tremor caused by multiple sclerosis, cerebellar degeneration, or drug toxicity. The principal outcome measures were the change in blind assessment of a writing task (spiral copying) and the timed completion of a nine hole peg test. Thirteen of 19 patients were deemed to have improved spiral copying after treatment with ondansetron when compared with baseline performance. One patient had a better response to the placebo compared with baseline performance (P = 0.00024). Patients completed the nine hole peg test in less time after ondansetron than after placebo (P = 0.08). Twelve patients thought that their tremor was functionally improved with the ondansetron treatment. None thought that the placebo gave improvement (P = 0.00098). The efficacy of orally administered ondansetron in tremor control is currently under study.     

Changes in iron, calcium, magnesium, copper, and zinc levels in different tissues of riboflavin-deficient rats

To clarify the changes of mineral levels in different tissues of riboflavin-deficient rats, Wistar rats were separated into three groups. One group was fed a diet ad libitum that was deficient in riboflavin. The other two were fed either the complete diet that was weight-matched to the riboflavin-deficient group or fed a complete diet ad libitum. In riboflavin-deficient rats, the hemoglobin concentration and riboflavin contents of blood, liver, and kidney were significantly decreased, compared with weight-matched and ad libitum-fed controls. The mineral concentrations of tissues are summarized as follows: The iron (Fe) concentration in the heart, liver, and spleen was decreased in the riboflavin-deficient group compared with the other groups. Calcium (Ca) and magnesium (Mg) concentrations in tibia were decreased in the riboflavin-deficient group compared with the other two groups. Copper (Cu) concentration was increased in the heart and liver, when the riboflavin-deficient group was compared with the other groups. Zinc (Zn) concentration was increased in tibia when the riboflavin-deficient group was compared with the other groups.     

Postnatally induced inactivation of gp130 in mice results in neurological, cardiac, hematopoietic, immunological, hepatic, and pulmonary defects

The pleiotrophic but overlapping functions of the cytokine family that includes interleukin (IL)-6, IL-11, leukemia inhibitory factor, oncostatin M, ciliary neurotrophic factor, and cardiotrophin 1 are mediated by the cytokine receptor subunit gp130 as the common signal transducer. Although mice lacking individual members of this family display only mild phenotypes, animals lacking gp130 are not viable. To assess the collective role of this cytokine family, we inducibly inactivated gp130 via Cre-loxP-mediated recombination in vivo. Such conditional mutant mice exhibited neurological, cardiac, hematopoietic, immunological, hepatic, and pulmonary defects, demonstrating the widespread importance of gp130-dependent cytokines.     

ICP-AES法快速测定碳化钽中的铁、硅、铝、钛、钨、钠、钙

本文采用iCAP6300型ICP光谱仪同时测定碳化钽中的七个杂质元素。样品用氢氟酸-硝酸在80℃的电热消解仪中将样品消解完全,用标准加入法于电感耦合等离子体发射光谱仪上同时测定碳化钽中的铁、硅、铝、钛、钨、钠和钙七种杂质元素。相对标准偏差小于10%,标准加入回收率为95%~125%。本方法快速简便,能满足进货检验和生产分析的需要。     

Covert communication in classrooms, clinics, courtrooms, and cubicles.

Interpersonal expectancy effects refer to the phenomena whereby one person's expectation for another person's behavior comes to serve as a self-fulfilling prophecy. The author examines the history and diversity of this area of inquiry, showing that the expectations of psychological researchers, classroom teachers, judges in the courtroom, business executives, and health care providers can unintentionally affect the responses of their research participants, pupils, jurors, employees, and patients. Using meta-analytic procedures, the author examines (a) moderator variables associated with the magnitude of interpersonal expectancy effects and (b) mediator variables implicated in the communication of interpersonal expectations. The author considers the social importance of the magnitudes of the obtained effects and points out research still needed to clarify issues in the mediation of these effects. (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

稀土金属中14种非稀土杂质的ICP-MS法同时测定

本文研究了用 ICP- MS仪器同时测定稀土金属中 Mg、Al、Ti、Cr、Mo、Mn、Co、Ni、Cu、Zn、Pb、W、Nb、Ta等 14种非稀土杂质。研究了各稀土基体对被分析元素的基体效应 ,选择了相匹配的内标元素。比较了标准曲线法与标准加入法的测定结果。确定了用内标元素校正基体效应及仪器漂移 ,以标准曲线法直接测定。进行了加料回收和精密度实验 ,回收率在 94%～ 113%之间 ,RSD<10 %。被分析元素的检出限为 0 .0 1～ 0 .2 0 ng/ m L,测定下限为1～ 2 0 μg/ g。