焦炭热反应性的研究

焦炭热反应性影响高炉的透气性和高炉顺行。炼铁系统随着高炉生产的不断强化，对焦炭的热态性能要求也逐步提高。为了掌握焦炭热反应性的内部机理及其影响因素．结合生产实际。探讨改善焦炭热反应性及反应后强度的措施，建立有效的焦炭热态性能预警系统。     

焦炭热态性能对高炉产质量影响的统计解析

 焦炭是高炉重要的燃料之一。 为研究不同范围内焦炭热态性能对高炉产质量指标的影响，首先统计实际高炉生产数据，将焦炭热态性能划分为不同区间，利用SPSS软件对不同区间数据进行统计解析，通过线性或非线性拟合得出影响规律和适宜的反应性和反应后强度。鉴于反应性和反应后强度存在较强的负相关性，综合考虑两因素，得出合适的焦炭综合热态性能，从而指导高炉和炼焦生产并提供一种新的焦炭热态性能研究方法。     

焦炭反应性与反应后强度的再探讨

对比了焦炭反应性及反应后强度的测定方法与焦炭在高炉内劣化过程的差异,讨论了影响焦炭CRI及CSR的主要因素,经过分析后认为,焦炭的反应性及反应后强度更多的是表征焦炭与CO2反应的活性,不能充分代表焦炭在高炉中的热态性能。     

马钢2500m3高炉重视焦炭热态性能的生产实践

对马钢2500m3高炉焦炭冷、热态性能的关系,影响热态性能的因素以及焦炭热态性能对高炉冶炼的影响进行了总结分析.2 500 m3高炉对焦炭性能的认识经历了由重视冷态性能到重视热态性能的转变,高炉技术经济指标的改善很大程度上归功于焦炭热态性能的改善.     

我国高炉喷煤现状及供求趋势分析

对马钢2500m^3高炉焦炭冷、热态性能的关系，影响热态性能的因素以及焦炭热态性能对高炉冶炼的影响进行了总结分析。2500m^3高炉对焦炭性能的认识经历了由重视冷态性能到重视热态性能的转变，高炉技术经济指标的改善很大程度上归功于焦炭热态性能的改善。     

焦炭反应性和反应后强度的关系及影响因素研究

为了预测焦炭在高炉中的反应行为,对莱钢大量的焦炭进行了检测及数据的分析,说明焦炭反应性与反应后强度之间有良好的负相关性;对焦炭冷态强度与热态性能之间进行了对比,建议企业在保证焦炭的冷态强度合格的同时更要关注焦炭的热态性能指标;对影响焦炭热性能指标的水分、熄焦方式及配煤结构等因素进行了试验研究,指出焦炭水分稳定在较低水平上可以提高焦炭的热性能;干法熄焦可以显著改善焦炭的热性能;验证了配煤结构及煤质性能对焦炭热性能有根本影响。     

焦炭冶金性能与高炉顺行的关系

焦炭的热态性能反应性及反应后强度，是衡量焦炭质量好坏的重要指标。指标的好坏。直接影响着焦炭作为高炉中料柱骨架作用，进而影响着高炉的透气性、透液性、焦比和喷煤比。     

高炉用焦热性质的初步探讨

现行的冷态检验焦炭质量的方法已不能确切地反映焦炭在高炉内的热性质,故就日本大分厂检验焦炭热性质的方法对鞍钢焦炭的反应性和反应后强度进行分析,提出了改善焦炭热性质的途径。     

有害元素对焦炭气化反应的影响及展望

焦炭在高炉冶炼过程中起着重要作用,其中焦炭的气化反应直接关系到其热态强度,并影响高炉内部的透气透液性能。综述了高炉内焦炭气化反应的研究现状,并讨论了焦炭气化反应的评价方法;阐述了有害元素K、Na、Zn和Cl对焦炭气化反应影响的研究进展。指出现有研究多着眼于焦炭和纯CO_2或水蒸汽的气化反应,并且冶金工作者对企业通用的焦炭气化反应的测定方法和标准存在不同的看法。K、Na、Zn和Cl均对焦炭气化反应起催化作用,其中K、Na和Zn的催化机理包括氧传递、层间化合物和电子转移3种理论。建议进一步模拟高炉实际气氛和温度条件开展焦炭气化反应的研究工作,并对Cl元素对焦炭气化反应的影响机理进行深入探索。     

有害元素对焦炭气化反应的影响及展望

摘要：焦炭在高炉冶炼过程中起着重要作用,其中焦炭的气化反应直接关系到其热态强度,并影响高炉内部的透气透液性能。综述了高炉内焦炭气化反应的研究现状,并讨论了焦炭气化反应的评价方法;阐述了有害元素K、Na、Zn和Cl对焦炭气化反应影响的研究进展。指出现有研究多着眼于焦炭和纯CO2或水蒸汽的气化反应,并且冶金工作者对企业通用的焦炭气化反应的测定方法和标准存在不同的看法。K、Na、Zn和Cl均对焦炭气化反应起催化作用,其中K、Na和Zn的催化机理包括氧传递、层间化合物和电子转移3种理论。建议进一步模拟高炉实际气氛和温度条件开展焦炭气化反应的研究工作,并对Cl元素对焦炭气化反应的影响机理进行深入探索。     

Benzimidazole resistance in cyathostomes in horses in the Ukraine

The efficacy of treatment with cambendazole was tested in 1-year-old horses on a farm in Dubrovka, Ukraine. Thirty-five horses were treated. Their egg output was compared on the day of treatment and 14 days later with that of 33 untreated horses. Before treatment the mean number of eggs g-1 faeces was 614 in the controls and 766 in horses that had been treated. After 14 days the mean egg output in the controls was 580 and in the treated horses 369. This means a reduction of 54.5%. Only cyathostome larvae could be cultured from faeces collected after treatment. It can be concluded that benzimidazole resistance in cyathostomes is present in the Ukraine.     

重庆高校推进产学研合作的案例分析

以重庆大学、重庆邮电大学和重庆理工大学为例,剖析重庆高校推进产学研合作的基本模式,已经取得的突出成绩,分析总结其基本经验.从完善政策法规体系、强化经济调控、建立组织机构、加强中介建设及开展国际产学研合作等方面,提出了深入推进重庆高校产学研合作的对策建议.     

Apoptosis in experimental myocardial infarction in situ and in the perfused heart in vitro

We report the appearance of apoptotic cells in experimental myocardial infarction (rabbit heart) in in situ and in vitro preparations. Apoptosis was recognized by intravital staining with Hoechst 33342 (Ho342), by nick-end labeling (TUNEL) and by DNA laddering. A steady rise in the relative number of apoptotic cardiomyocytes (apoptotic index) was noted in in situ preparations. Apoptosis was first noted 6 h after the onset of ischemia with its highest value occurring after 72 h. Apoptotic nuclei were absent in remote areas of the left and right ventricles. Apoptotic nuclei within the infarcted area showed diminished intensity of Ho342 fluorescence. Three days after ischemia, a border zone adjacent to the infarcted area consisting of apoptotic macrophages was recognized. A novel finding was the appearance of apoptotic cardiomyocytes in the isolated perfused ischemic heart. Occurring as early as 50 min after the onset of ischemia, a high apoptotic index was present adjacent to the ligature placed around the coronary artery. This observation provides the opportunity to selectively examine factors leading to apoptosis in the ischemic heart under controlled experimental conditions.     

Fractures in childhood in Khartoum

A prospective study of fractures in 231 children received at Khartoum North Teaching Hospital(KNTH) was carried out for a period of six months. The incidence of child fracture rated as one per day, then it increased from the age of 5 years onwards in boys and between 6 and 8 years in girls. Most injuries were sustained during the day time, especially between late afternoon and sunset. 82% of injured children presented to a medical facility, while 18% were taken to native healers first. Non-road traffic accidents accounted for 84% of the fractures mainly due to sports, domestic injuries and falls; whereas road traffic accidents were 16% and occurred mainly in pedestrians. Forty three percent of the fractures needed only first aid and splintage while 42% needed closed reduction. Thirty one percent of all patients were treated as inpatients. The long bones were affected in 91% of all fractures, the commonest site being the distal end of the forearm (26%), followed by supracondylar fracture of the humerus (15.6%). In the upper limb, left-sided fractures predominated. The epiphyseal injuries were 3.5% of all fractures, mainly at the distal radial epiphysis. Boys were commonly affected between 13-15 years of age. Open fractures constituted 9.8% of the series and were mainly due to traffic accidents in town dwellers, the most vulnerable bones were those of the leg and foot. Pathological fractures accounted for 2.2% and were due to bone cysts and osteogenesis imperfecta. The problem of child safety and the preventive measures need to be more stressed.     

Botulism in Poland in 1996

A model is presented in which ion translocation through the F0 part of the ATP synthase drives the rotation of the ring of c subunits (rotor) versus the a subunit (stator). The coupling ion binding sites on the rotor are accessible from the cytoplasm of a bacterial cell except for the c subunit at the interface to the stator. Here, the binding site is accessible from the periplasm through a channel formed by subunit a. In the ATP synthesis mode, a coupling ion is anticipated to pass through the stator channel into the binding site of the adjacent rotor subunit, following the electrical potential. Occupation of this site triggers, probably by electrostatic forces, the rotation of the ring. This makes the binding site accessible to the cytoplasm, where the coupling ion dissociates. Simultaneously, this rotation moves again an empty rotor subunit into the contact site with the stator, where its binding site becomes loaded and rotation continues.     

Problems in falling in love

Certain patients enter psychoanalysis because of their inability to love another person. Often they report a repetitive erotic pursuit of desired partners, without being able to experience or maintain loving feelings. Kernberg has understood such difficulties as representing effects of early narcissistic disappointments and/or of difficulties in resolving oedipal conflicts. In this paper, Lacanian concepts of the mirror phase and symbolic love are employed to develop these issues. Sexualization of problems in mirroring may be fused with oedipal conflicts in some cases. An extended vignette is presented to illustrate the technical and theoretical issues.