云南蒙自野生野蚕豆根金属元素含量分析

[目的]测定云南蒙自野生歼蚕豆根中金属元素的含量,以期为进一步开发利用野生野蚕豆根资源提供科学依据.[方法]采用火焰原子吸收光谱法测定野蚕豆根中Ca、Fe、Zn、Cu、Pb和Cr 6种金属元素的含量.[结果]云南野生野蚕豆根中含有丰富的金属元素Ca、Zn、Cu和Fe,且含量分布为Ca>Fe>Zn>Cu;未检出有害元素Pb和Cr.[结论]云南蒙自野生野蚕豆根中含有丰富的金属元素.     

不同消解方法对测定蒲公英中微量元素含量的影响

[目的]考察不同消解方法对蒲公英中Fe、zn、Cu、Mn 元素含量测定的影响.[方法]分别通过干法、湿法、微波法处理样品,利用原子吸收分光光度计测定样品中的4 种元素含量.[结果]用微波法消解样品时,测得Cu、Zn、Fe、Mn含量分别为35.01、103.11、210.86、21.13.μg/g,高于干法和湿法这2 种消解方法处理.[结论]微波消解法适合用于植物样品微量元素测定的前处理.     

凯里地区槐花中微量元素含量的测定

[目的]测定凯里地区槐花样品中微量元素的含量.[方法]采用微波消解-火焰原子吸收光谱法测定本地药食两用槐花中K、Ca、Zn、Fe、Pb和Cd 6种微量元素的含量.[结果]凯里下司地区的槐花含有丰富的人体必需微量元素K、Ca、Zn和Fe,且含量分布为:Fe>Ca>K>Zn;未检出有害元素Cd和Pb.所测元素回收率为94.1%～110.0%,RSD值为0.54%～1.73%.[结论]该研究可为当地槐花的药用价值提供科学的评价依据.     

火焰原子吸收光谱法测定航空煤油中铅锰镁锌铜

油类样品易燃易爆,在对其中较低含量金属元素进行分析时极易引起被测元素损失且一般进样系统无法对其直接测定,因此测定时样品的前处理过程非常重要。实验取100 mL航空煤油样品于500 mL分液漏斗中,加入2.0 mL碘-二甲苯溶液和15 mL硝酸(1+9)重复萃取2次,将两次萃取液合并后再用10 mL水萃取一次,萃取液浓缩后采用火焰原子吸收光谱法(FAAS)进行测定,建立了测定航空煤油中铅、锰、镁、锌和铜5种元素含量的方法。结果表明:铅、锰、镁、锌和铜5种金属元素校准曲线的相关系数均大于0.999 0,方法检出限为0.009～0.256 μg/mL。采用实验方法对航空煤油样品进行测定,测定结果与电感耦合等离子体原子发射光谱法(ICP-AES)基本一致,相对标准偏差(RSD,n＝9)为0.86%～5.4%。将实验方法应用于4个不同产地的航空煤油样品中铅、锰、镁、锌和铜的测定,各个元素的加标回收率均在96%～103%之间。     

粉葛中微量元素含量的测定

[目的]测定粉葛样品中微量元素的含量.[方法]采用火焰原子吸收光谱法测定7种粉葛中Mg、Fe、Mn和Zn4种微量元素的含量.[结果]粉葛样品富含Mg、Fe、Mn和Zn元素;不同产地不同品种粉葛的微量元素含量差异明显,即使同一产地不同品种粉葛的微量元素含量也有差异.[结论]该研究可为粉葛资源的进一步开发利用提供参考.     

不同原产地苦荞种子中可溶性糖含量的比较

[目的]研究不同原产地苦荞种子中可溶性糖的含量差异.[方法]以不同原产地的35份苦荞样品为试验材料,采用比色法测定了其籽粒的可溶性糖含量.[结果]不同原产地的35份苦荞样品中的可溶性糖含量变化范围为7.23%～9.96%,平均值为8.17%;其中以贵州威宁产苦荞种子1374中可溶性糖含量最高,达9.96%;贵州威宁产种子苦荞T330中可溶性糖含量最低,为7.23%.[结论]该研究为苦荞植物资源的种植栽培和质量控制提供了科学依据.     

微波消解石墨炉原子吸收光谱法测定茶叶中镍

[目的]利用微波消解石墨炉原子吸收法测定茶叶中镍含量.[方法]分别从消解液和样品消解量方面进行消解条件的优化,以建立最适合的消解方法.[结果]茶叶样品以5 ml HNO3-2 ml H2O2 混合体系为消解液,坡度升温方式微波高压密闭消解结合石墨炉原子吸收光谱法测定,样品检出限为0.15 μg/g,回收率为97.8%,RSD为1.9%.[结论]该方法简单快速,效率高,劳动强度低,是进行茶叶中镍元素测定的高效方法.     

火焰原子吸收光谱法测定牛奶中锌含量的研究

[目的]为牛乳中微量元素营养价值的研究提供参考.[方法]采用稀释法处理纯牛奶样品,并采用火焰原子分光光度法测定了纯牛奶中锌元素的含量.[结果]纯牛奶中锌元素的含量为6.25 g/ml.该方法的加标回收率为104.0%,精密度(样品相对标准偏差RSD)为0.61%.[结论]该法样品前处理简便、快捷,测定结果准确,适用于纯牛奶中锌含量的测定.     

黑龙江野生中华稻蝗虫体内矿物元素含量的测定

[目的]测定黑龙江野生中华稻蝗体内矿物元素的含量.[方法]利用火焰原子吸收光谱法分析蝗虫体内矿物元素(Na、K、Ca、Mg、Zn)的含量.[结果]中华稻蝗体内矿物元素Na、K、Ca、Mg、Zn的含量分别为22.77、11.87、3.21、2.79、0.45 mg/g,回收率为97.70%～105.00%.[结论]黑龙江野生中华稻蝗可以增加人体缺乏的矿物元素.火焰原子吸收光谱法灵敏度高、分析速度快、消除干扰能力强,又可降低成本.     

烟草及烟草制品中硝酸盐/亚硝酸盐流动分析模块的建立

[目的]组建流动分析模块,并用于检测烟草中硝酸盐/亚硝酸盐的含量.[方法]收集可用材料、配件组装模块,然后对样品以及标准物质进行检测,确定其重复性、回收率、检测限,以验证模块可用性.[结果]通过反复改进组装模块,对多个烟草样品硝酸盐/亚硝酸盐含量分别测定多次,测定模块重复性,结果RSD<2.92%;向样品中加入标准溶液测定回收率,回收率为97.2%～104.9%.[结论]组装模块能够满足烟草及烟草制品中硝酸盐/亚硝酸盐含量检测需要,节省了新购仪器的费用,同时提高了现有仪器的使用率.     

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。     

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。     

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.     

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.     

参与式农业基地建设行动方案设计

为了编制实用性强的基地建设行动方案,首先,确定参与式发展的主体,搭建一个"决策框架";其次,针对行动目标,提出不同参与主体,如管理者、农民、消费者等团队与个人的目标及行动内容;最后,工作应向重塑伙伴式合作关系,挖掘农民自我发展潜力,完成三大角色的转换,打造农业基地文化等方向推进.