地质勘查技术在找矿中的应用及发展前景

随着经济的发展和科技的进步,地质勘查技术在找矿中的应用也日益广泛。本文主要探讨了地质勘查技术在找矿中的应用及发展前景。首先,介绍了地质勘查技术的重要性,然后详细阐述了地质勘查技术在找矿中的应用,包括地层分析技术、岩体工程地质勘查技术、矿产勘查技术、水文地质勘查技术、地球物理勘查技术、地球化学勘查技术、遥感技术、三维地质建模技术、地质填图技术、数值模拟技术,最后分析了地质勘查技术的发展前景。     

改扩建矿井通风智能化技术研究现状

基于改扩建矿井通风智能化技术体系的现状分析,与改扩建矿井通风智能化技术能力的研究现状分析。从智能化结构技术体系,智能化数据采集分析技术体系,在线状态识别技术与在线调节技术,故障诊断技术与整体优化技术四方面阐述改扩建矿井通风智能化技术研究现状。     

高效连铸的重要技术

高效铸是炼钢工艺流程中的一项系统技术。以技术集成的观点阐述了高效连铸、理解高效连铸的重要技术,即物流管制技术、钢包技术、中间包技术、二次冷却技术、连续矫直技术、保护渣技术等,对深入认识高效连铸、理解高效连铸的重要技术及在实践中的应用有重要指导意义。     

连铸辊表面堆焊技术的应用进展

分析了炼钢厂连铸辊部件表面堆焊技术的发展现状及应用空间,分别从连铸辊母材、焊材成分、堆焊技术、用户需求等维度,阐述了连铸辊表面堆焊技术的应用进展。目前,连铸辊表面改性技术领域,以表面堆焊技术为主流技术。其它表面处理技术(如激光熔敷技术、热喷涂技术等)仅仅处于试验研究阶段,堆焊技术仍然具有较大的工程应用技术优势。连铸辊表面堆焊技术的应用应使产品全生命周期价值最大化,实现与用户共赢。     

关于PM材料制品技术的发展及其工业化的意见

本文叙述了新的ＰＭ技术如超细粉制造技术、快速凝固制粉技术、机械合金化技术、液相烧结技术、快速固结技术等。通过简要叙述,结合上海科研和生产的需要,提出了粉末冶金技术发展和工业化的一些建议。     

几种钢铁冶炼的节能和环保技术

介绍了几种钢铁冶炼节能、环保技术:转炉冶炼纯净钢技术、转炉"负能"炼钢技术、废钢预热型电弧炉技术、高效连铸技术、干熄焦(CDQ)技术、煤调湿技术、"SCOPE21"炼焦技术、环保型烧结技术。     

粉末冶金成形新工艺和技术发展概况

简要介绍了粉末冶金新的成形工艺和技术。包括:等静压成形技术;粉末热锻技术;粉末冶金注射成形技术和粉末冶金喷射成形技术。     

变频调速技术的发展及在冶金行业的应用

交流电机变频调速技术是(强电)电力技术和微电子技术、计算机技术高度结合的高科技技术。该技术以其优异的性能和强大的功能、淘汰、取代直流调速技术已是必然的技术趋势。最近的十几年以来,变频凋速技术飞速发展。变频器中功率元器件、变频控制方式和计算机技术都有很快的发展。上述技术的高速发展,变频器的性能和功能、稳定性和可靠性大大提高,应用领域更为广泛。     

煤矿机械设备常见故障诊断技术及诊断系统

本文主要介绍煤矿机械设备的故障诊断技术。分别分析振动检测诊断技术、油样分析诊断技术、红外测温诊断技术和无损检测技术四类故障诊断技术的技术要领,并基于上述诊断技术,对目前国际上常用的积累软件系统进行综述,并对产生的经济效益进行了分析。     

“十五”期间我国冶金环保专业开发技术

(1 )冶金二次能源回收及资源回收利用技术 :提高炼钢转炉、铁合金炉煤气回收数量和质量技术 ;炼钢电炉烟气预热废钢技术 ;干法熄焦技术 ;烧结机余热回收利用技术 ;高炉热风炉烟气余热回收利用技术 ;炼焦装煤水分调控技术 ;转炉煤气、高炉煤气干式静电除尘技术 ;提高冶炼渣及含铁尘泥利用价值技术。(2 )钢铁企业节水及废水资源化技术。(3)大中型高炉炼铁系统清洁生产示范工程。(4)大中型焦炉污染控制技术。(5)矿山污染治理及生态恢复技术。(6)冶金清洁生产技术研究与评价体系。(7)国家酸雨及 SO2 控制区内烧结机及自备电厂烟气脱硫技术“十…     

Antibacterial activities of combination uses of isepamicin and beta-lactams in vitro against clinically isolated strains. Part 1. Activities against Staphylococcus aureus

In order to evaluate antibacterial activities of combination uses of isepamicin (ISP) and beta-lactams in vitro, minimum inhibitory concentrations (MICs) these drugs were examined singly and in combination against clinically isolated Staphylococcus aureus. The results are summarized as follows; 1. MICs of ISP + cefazolin (CEZ), ISP + cefotiam (CTM) and ISP + flomoxef (FMOX) were low and the activities against methicillin (DMPPC)-susceptible S. aureus (MSSA) were dependent on the concentration of ISP. Combined effects were observed when the concentrations of ISP were at sub-MIC levels (1/2 approximately 1/4 concentrations). 2. MICs of ISP + CEX, ISP + CTM, ISP + FMOX, ISP + imipenem and ISP + panipenem were low and the activities against DMPPC-resistant S. aureus (MRSA) were dependent on the concentration of ISP, and were similar to those against MSSA. Combined effects were observed when the concentrations of ISP were at sub-MIC levels of ISP. Lower MIC50 or MIC90 was observed at ISP concentrations of 4 approximately 16 micrograms/ml. 3. The blood Cmax of ISP exceeded 20 micrograms/ml at one-time administration of ISP 400 mg, and these results suggested that antibacterial activities of combination uses of ISP and beta-lactams was clinically effective against MRSA infections.     

Constant-pressure coronary artery perfusion during aortic valve operations

The aim of this study was to investigate the action of isoproterenol (ISP) on the myocardium by means of light microscopy, histochemistry, autoradiography with tritiated ISP and electron microscopy. One hundred and sixty four Wistar rats were divided into 8 groups. Group A, B, C and D were given 10 mg/kg i.p. ISP (plus 5 uC of tritiated ISP). The animals were sacrificed at different intervals. Group E served as control to proceeding groups. Group F was given 10 mg/kg i.p. ISP and subjected to "holding" stress; Group G was its corresponding control. Group H received 9 mg/kg. prenylamine, as inhibiting drug, 1 hour before and hour after ISP injection. Histopathology of "infarct like" lesions presenting localized necrosis, myocytolysis, homogenization and positive tests for ischemia are correlated to the localization of tritiated ISP on sarcolemma and to changes in succine dehydrogenase enzymes in the groups A, B, C and D. Hypercontraction and widening of Z bands of sarcomers are found in electron microscopy. These ischemic changes are inhibited by prenylamine, a drug acting as moderator of catecholamine effects by slowing down Ca transport. It is concluded that myocardial necrosis induced by ISP is probably due to an increased activation of the "calcium pump". The ISP provoked lesions appear to be a promising model to study experimental myocardial necrosis.     

密闭鼓风炉炼锌工艺实践

密闭鼓风炉炼锌（ISP）是一种对原料具有较好适应性的火法炼锌方法。本文在分析了ISP工艺的基础上，根据东岭集团铅锌冶炼公司采用ISP工艺的独特实践过程，总结了该公司ISP具体生产实践、工艺流程及各主要参数对工艺过程的影响。     

提高韶冶ISP铅锌冶炼原燃料经济性途径的探讨

简单介绍了ISP铅锌冶炼工艺,分析了ISP原燃料成本状况及该原燃料条件下对工艺过程的影响,提出了提高ISP铅锌冶炼原燃料经济性的途径及相应的工艺措施。     

Intraluminal increase of superoxide anion following transient focal cerebral ischemia in rats

OBJECTIVES: We studied the triggering mechanism for neurally mediated syncope. BACKGROUND: Although increased transient sympathetic tone is thought to be necessary for the development of neurally mediated syncope, little is known about the triggering mechanism for neurally mediated syncope. METHODS: Plasma epinephrine (EP) and norepinephrine (NE) levels were assessed in 20 syncope patients during tilt test (80 degrees, 15 min) with and without isoproterenol (ISP, 0.01, 0.02 microg/kg/min). If syncope occurred, propranolol (0.1 mg/kg) was injected. RESULTS: Eight patients experienced syncope during tilting alone, and 9 patients required ISP for syncope. In the negative response without ISP, NE showed a small statistical 1.7-fold increase at end of tilting and EP did not change during tilting. When syncope occurred during tilting alone, a significant 11.7-fold increase in EP at syncope was registered concomitant with a small 2.5-fold increase in NE. When patients experienced syncope during tilting with ISP, a significant 5.0-fold increase in EP at syncope was registered concomitant with a small 1.7-fold increase in NE. In patients without ISP, propranolol did not interrupt syncope. In patients with ISP, six of eight receiving propranolol responded to tilting negatively. CONCLUSIONS: An increase of NE levels may result in inhibition of syncope and an EP surge may be a triggering mechanism for neurally mediated syncope. Comparatively low levels of EP may be enough to induce syncope during tilting with ISP compared with tilting alone. Propranolol is not effective in patients without ISP, but it frequently inhibits syncope in patients with ISP. Propranolol (0.1 mg/kg) may be insufficient to block the actions of high levels of circulating EP.     

A computational study of the resistance of HIV-1 aspartic protease to the inhibitors ABT-538 and VX-478 and design of new analogues

The long-term clinical effects of soy protein containing various amounts of isoflavones on lipoproteins, mononuclear cell LDL receptor messenger RNA concentrations, and other selected cardiovascular risk factors are not well known. Sixty-six hypercholesterolemic, free-living, postmenopausal women were investigated during a 6-mo parallel-group, double-blind trial with 3 interventions. After a control period of 14 d, all subjects were randomly assigned to 1 of 3 dietary groups (all with 40 g protein): a National Cholesterol Education Program (NCEP) Step 1 diet with protein from casein and nonfat dry milk (control), an NCEP Step 1 diet with protein from isolated soy protein containing moderate amounts of isoflavones (ISP56), or an NCEP Step 1 diet with protein from isolated soy protein containing high amounts of isoflavones (ISP90). Non-HDL cholesterol in both the ISP56 and ISP90 groups was reduced compared with the control group (P < 0.05), whereas total cholesterol was not changed. HDL cholesterol increased in both the ISP56 and ISP90 groups (P < 0.05), whereas the ratio of total to HDL cholesterol decreased significantly in both groups compared with the control (P < 0.05). Mononuclear cell LDL receptor messenger RNA concentrations increased in subjects consuming ISP56 or ISP90 compared with the control (P < 0.05). These results indicate that soy protein, with different amounts of isoflavones, may decrease the risk of cardiovascular disease via improved blood lipid profiles, and that the mechanism by which apolipoprotein B-containing lipoproteins were depressed may be via alterations in LDL receptor quantity or activity.     

Impact of an independent-study programme upon professional careers

A survey of graduates of the Independent-Study Programme (ISP) at the College of Medicine, University of Illinois, was conducted in order to assess the impact of the ISP on their subsequent careers. Responses from ninety-nine of these graduates, when compared with their classmates, lend strong support to the idea that such an independent study programme has long-lasting effects on the participants. The ISP graduates are selecting a medical subspecialty in a much higher percentage than their classmates or the national average. They also are engaging in more research, administration, and teaching. Differences between the ISP and the traditional graduates are explained in terms of unique educational opportunities, contact with teachers and peers, orientation towards independent learning and curricular requirements.     

用铅锌密闭鼓风炉替代竖罐炼锌工程设计

本文阐述了ISP工艺的主要优点和替代竖罐炼锌的合理性。介绍了在国内外ISP厂家成功经验的基础上所作的主要设计改进。     

ISP工艺在韶冶的发展与实践

文章分析了ISP工艺的特点，阐述了其在韶关冶炼厂的发展历程，总结了韶冶通过改造密闭鼓风炉体，改善冷凝器结构，完善工艺操作，科学的制度管理所取得的成效，提出了优化ISPTZ的主要方法。     

Isolation of marine polycyclic aromatic hydrocarbon (PAH)-degrading Cycloclasticus strains from the Gulf of Mexico and comparison of their PAH degradation ability with that of puget sound Cycloclasticus strains

Phenanthrene- and naphthalene-degrading bacteria were isolated from four offshore and nearshore locations in the Gulf of Mexico by using a modified most-probable-number technique. The concentrations of these bacteria ranged from 10(2) to 10(6) cells per ml of wet surficial sediment in mildly contaminated and noncontaminated sediments. A total of 23 strains of polycyclic aromatic hydrocarbon (PAH)-degrading bacteria were obtained. Based on partial 16S ribosomal DNA sequences and phenotypic characteristics, these 23 strains are members of the genus Cycloclasticus. Three representatives were chosen for a complete phylogenetic analysis, which confirmed the close relationship of these isolates to type strain Cycloclasticus pugetii PS-1, which was isolated from Puget Sound. PAH substrate utilization tests which included high-molecular-weight PAHs revealed that these isolates had similar, broad substrate ranges which included naphthalene, substituted naphthalenes, phenanthrene, biphenyl, anthracene, acenaphthene, and fluorene. Degradation of pyrene and fluoranthene occurred only when the strains were incubated with phenanthrene. Two distinct partial PAH dioxygenase iron sulfur protein (ISP) gene sequences were PCR amplified from Puget Sound and Gulf of Mexico Cycloclasticus strains. Phylogenetic analyses of these sequences revealed that one ISP type is related to the bph type of ISP sequences, while the other ISP type is related to the nah type of ISP sequences. The predicted ISP amino acid sequences for the Gulf of Mexico and Puget Sound strains are identical, which supports the hypothesis that these geographically separated isolates are closely related phylogentically. Cycloclasticus species appear to be numerically important and widespread PAH-degrading bacteria in both Puget Sound and the Gulf of Mexico.