中国电子废弃物产生量预测及金属积存量特征分析

通过市场供给模型预测我国电视机、洗衣机、空调、电冰箱、电脑5种家用电器废弃量,并通过模块分析计算出其中所含金属量.市场供给模型预测结果表明:我国家用电器废弃量正进入一个快速增长阶段,到2020年,5种主要家用电器废弃量预计将会是2010年的3倍,2010~2020年,5种废家用电器累计产生量将超过18亿台.模块分析结果显示,2000~2020年,家用电器废弃物中铁、铝、铜积存量处于一个快速增长的阶段;其它重金属锡、铅、锌、钴积存量都呈现增长趋势;贵金属中,金呈增长趋势,银、钯呈先增加后减少的趋势.      

Chemical constituents from the aerial part of Epimedium brevicornum Maxim

Six flavonoids were isolated from the aerial part of Epimedium brevicornum and identified as baohuo side I, 2"' O-rhamnosyl icariside II, sagittatoside B, baohuoside II, ikarisoside F and ikarisoside C by means of UV, IR, 1H-NMR, 13C-NMR and FAB-MS spectral analysis, they were isolated from this plant for the first time.     

Wayfinding and toddlers' use of information from an aerial view of a maze.

Implemented a technique in 3 experiments with 104 9–25 mo old Ss to study the capacities of toddlers to mentally represent and coordinate multiple views of the spatial layout in a large locale. During the procedure, Ss were provided with an aerial view of a maze, returned to the ground, and then motivated to travel through the maze. To navigate a maze under these conditions requires that an observer mentally represent the layout of maze barriers and coordinate air and ground views of the maze. Results indicate that these capacities may not emerge until the end of the 2nd yr of life. (12 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

有色金属工业污染物排放标准体系的研究

介绍了建立有色金属工业污染物排放标准体系的重要性。叙述了该标准体系的构架,制定原则、方法及完善。     

有色金属工业污染物排放标准体系的研究

介绍了建立有色金属工业污染物排放标准体系的重要性。叙述了该标准体系的构架，制定原则、方法及完善。     

Nitroxides increase the detectable amount of nitric oxide released from endothelial cells

Nitroxides are known to exert superoxide dismutase-mimetic properties and to decrease O-2- and H2O2-mediated cytotoxicity. However, the effect of nitroxides on .NO homeostasis has not been studied yet. The present study investigates the effect of nitroxides on the detectable amount of .NO released by 3-morpholinosydnonimine (SIN-1) and cultured endothelial cells. Cultured bovine aortic and atrial endothelial cells stimulated with 10 microM A23187 released a stable flux of .NO, as detected by .NO chemiluminescence. Addition of 100 units/ml SOD or 10 microM of the nitroxides 4-hydroxy-2,2,6, 6-tetramethylpiperidine-N-oxyl (TEMPOL), 3-carboxy-proxyl, and 3-ethoxycarbonyl-proxyl, increased the chemiluminescence signal. The effect of these nitroxides on the amount of .NO released from cell monolayers was dose-dependent, with the highest efficacy between 30 and 100 microM. EPR spin trapping in SIN-1 solutions revealed the formation of .OH adducts from spontaneous dismutation of O-2 and concomitant reaction with H2O2. Both SOD and TEMPOL increased the signal intensity of the .OH adduct by accelerating the dismutation of O-2. The results of this study demonstrate that the SOD-mimetic activity of nitroxides increases the amount of bioavailable .NO in vitro.     

Protection of residents in the vicinity of intensive livestock units from possible health risks

To assess whether hormone and metabolic responses in an upright bicycle exercise test are equivalent for subjects with different physical characteristics if test duration for reaching individual maximal work capacity (PWCmax) is standardized we investigated plasma catecholamines, human atrial natriuretic peptide (hANP) and blood lactate responses in twenty healthy sedentary subjects. Ten male (38.5 +/- 4.7 yrs) and ten female (34.5 +/- 6.4 yrs) healthy volunteers performed two ergometries, a first one with incremental steps of 25 Watts each for two minutes to determine PWCmax, and a second one with incremental steps of PWCmax/6. According to this definition a test duration of 12 min was attained for all subjects for the second ergometry. The results show that the increase of the rate pressure product (RPP) as an index of relative cardiac work is significantly different between the male and female group in the test with constant 25 Watts steps. But with the modified exercise test RPP/time-slopes are nearly identical, identicating equivalent cardiac work due to gender and body surface. Similar results are obtained for plasma catecholamines, hANP and blood lactate. Mean values did not differ in the modified exercise test between the male and female group either in the sub-maximal range or at PWCmax. In conclusion, our data suggest that in a maximal exercise test with equal test duration, and considering individual physical properties for the calculation of incremental steps hormonal and metabolic responses are equivalent. It seems that the designed, modified exercise test provides inter-individual comparisons at least for these investigated parameters. The test may be helpful if catecholamines, hANP or lactate are used as diagnostic parameters in patients.     

转炉下渣控制技术在首钢的应用与发展

首都钢铁集团公司迁安钢铁有限责任公司炼钢厂经过设备改造和技术革新,转炉下渣控制水平取得了一定的进步。对于吹炼汽车板等低碳钢种,钢包内渣厚能够控制在平均33.7mm,下渣量控制在平均4.8kg/t。此外,转炉终渣中T.Fe含量的升高和未使用下渣检测设备等都有可能导致下渣量增大。     

中澳单种煤性质比较研究

介绍了国内部分地区10种炼焦煤及6种澳洲煤的特性,通过对镜质组平均最大反射率、岩相组成、硫含量、磷含量、灰成分催化系数、流动度、奥亚膨胀度等单种煤性质的测定及单种煤炼焦试验,对比澳洲煤与国内煤差异,通过比较发现,对焦炭质量有积极贡献的指标澳洲煤大多优于国内煤。     

Production of tubular structures from the aerial mycelium of Actinomyces roseoflavus var. roseofungini]

Jejunal lamina propria plasma cells and eosinophils and intraepithelial lymphocytes were raised in coeliac children on gluten-containing diets, but only intraepithelial lymphocytes were increased in patients on gluten-free diets. In contrast, lamina propria lymphocytes were reduced in children with coeliad disease on gluten-containing diets but were normal in paitents on gluten-free diets. In children with coeliac disease who were studied serially, lamina propria plasma cells and eosinophils and intraepithelial lymphocytes increased, and lamina propria lymphocytes decreased, within three months of the reintroduction of gluten to the diet. These observations are essentially similar to those made in the adult form of the disease and suggest that more than one type of immunological reaction is involved in the pathogenesis of the jejunal lesion.     

4#高炉TRT发电量分析

通过对几年来包钢4#高炉TRT装置技术参数的研究,总结并分析了影响TRT发电量的各种因素,并主要从主机系统的效率及煤气量两个方面探讨了提高TRT发电量的途径.     

4#高炉TRT发电量分析

通过对几年来包钢4#高炉TRT装置技术参数的研究,总结并分析了影响TRT发电量的各种因素,并主要从主机系统的效率及煤气量两个方面探讨了提高TRT发电量的途径.     

空中加油机加油软管系统建模和控制研究进展

空中加油软管系统作为空中加油过程最重要的组成部分,其建模和控制研究是一个重要研究方向,已经取得了很大进展.首先在概述了空中加油的主要类型的基础上,分析了软管式空中加油的特点;然后分别介绍了基于常微分方程和基于偏微分方程的两种软管系统的建模方法;进一步针对空中加油机加油全过程分析了加油软管系统的对接控制、软管的振动抑制和可控锥套的研究;最后从加油软管系统的建模和控制方面展望了软管式空中加油未来的发展趋势.     

Teaching principles of behavior and equipment design for handling livestock

A course is described in which students are taught principles of livestock behavior and how an understanding of behavior can facilitate handling. Some of the principles that are covered in the course are livestock senses, flight zone, herd behavior during handling, and methods to reduce stress during handling. To teach problem solving and original thinking, the students design three different types of handling facilities. Design of restraint equipment and humane slaughter procedures are also covered. Both existing systems and ideas for future systems are discussed. Students are provided with information from both scientific studies and practical experience.