次氧化锌粉吸收低浓度SO_2试验

以某锌冶炼企业所收集的次氧化锌粉制备的浆料吸收低浓度二氧化硫烟气。结果表明,在常温、次氧化锌浆料浓度15%、浆料pH4.5、烟气流量750m3/h的条件下,吸收模拟的含二氧化硫2 130mg/m3的烟气,二氧化硫吸收率能达到99.6%,吸收后的尾气二氧化硫可达到相关排放标准,并且二氧化硫和锌可循环利用。     

浅析CEMS-2000S监测系统在脱硫生产中的应用

CEMS烟气连续监测系统优选世界上成熟的先进技术,主要用来连续监测烟气中烟尘、二氧化硫及氮氧化物的排放浓度及排放总量。攀钢采用离子液循环法脱硫,完全直接抽取法测量。     

工业二氧化硫排放监测研究

本文通过对涟钢除尘烟道中二氧化硫的综合监测，旨在研究涟钢二氧化硫的排放规律和扩散规律，以有效的对二氧化硫污染设施进行综合整治，提高大气环境质量，降低消耗，减少二氧化硫的危害。     

烟尘采样器在铜冶炼工艺烟气监测中的应用

铜冶炼工艺烟气温度高,二氧化硫浓度高,其电收尘的监测以往一直采用恒流法,恒流法存在自动化水平低、数据准确性低、故障率高等问题。通过改进烟气预处理器和吸收液,并将微电脑烟尘采样器应用于铜冶炼工艺烟气监测,经预处理后烟气各参数均满足仪器要求,数据结果准确性明显提高。通过此应用成功解决了恒流法采样的问题。     

固定污染源烟气在线监测系统验收工作探讨

主要探讨了固定污染源烟气在线监测系统（CEMS）的验收工作。从验收流程、基本验收要求、技术验收要求等方面论述了CEMS验收监测。同时依据《固定污染源烟气排放连续监测技术规范》（HJ/T 75—2007）和《固定污染源烟气排放连续监测系统技术要求及检测方法》（HJ/T 76—2007）,针对宝钢股份公司本部炼铁厂2#烧结机CEMS,重点说明了验收监测的方法及验收监测比对指标,并提出了规范CEMS验收流程的建议以及验收工作的重要性。     

SDA脱硫技术在400m~2烧结机的应用

济钢400 m2烧结机选用SDA脱硫技术进行烟气脱硫,该技术系统主要包括脱硫及除尘系统,脱硫剂贮存、制浆及输送供给系统,循环灰贮存、制浆及输送供给系统,脱硫灰、除尘灰输送贮存及外排系统。应用实践证明,SDA脱硫技术运行稳定,脱硫效率高,且颗粒物排放浓度低,烟尘排放浓度小于20 mg/m3,二氧化硫和颗粒物同时达到排放标准。     

基于XRF技术的烟气重金属在线监测系统的研制

基于XRF技术的烟气重金属在线监测仪可用于实时在线监测燃煤电厂中烟气颗粒物中铅、汞等重金属的含量,检测时烟气的取样量大,数据准确度高有代表性,无需额外添加药剂,不会对环境产生二次污染,设备结构简单可靠,无需复杂的预处理。     

金属镁冶炼还原渣脱硫性能

为充分利用固废资源，降低脱硫成本，采用传统皮江法冶镁工艺中产生的金属镁渣为基质，利用实验室湿式脱硫系统，对不同镁渣粒径、烟气气体流速、二氧化硫浓度、固液质量比（简称固液比）以及氧气含量条件下的脱硫性能进行了研究。结果表明，样品粒径越小，流速越慢，二氧化硫流速越低，固液比越低，脱硫量越高；反之，则脱硫量越小。在粒径0.106 mm、烟气流速340 mL/min、二氧化硫流速10 mL/min、固液比0.1 g/g、饱和脱硫时间1 575 min的条件下，二氧化硫吸附量为1 354.62 mg/g。     

烧结机风箱中烟气排放规律及分析

 为了研究烧结机各个风箱中烟气的变化规律,选择某400 m2烧结机为研究对象,通过使用不同的烟气分析仪器对烧结机48个风箱中的烟气进行检测,得出了大型烧结机不同风箱中烟气温度、负压、流速、烟气成分(包括氧气、二氧化硫、一氧化碳、氮氧化物)等的变化规律;将烧结过程的料层分为6个状态,结合料层状态和风箱烟气参数分析了不同风箱对应的料层状态,解析了各个风箱烟气参数变化与料层状态的关联性和各个参数之间的相关性。可以得出,烟气的负压与流速的变化正相关;烟气温度与二氧化硫质量浓度变化趋势一致;氧气体积分数与一氧化碳、氮氧化物质量浓度变化呈现负相关趋势;一氧化碳和氮氧化物质量浓度变化一致;不同风箱烟气参数变化与风箱对应的烧结料层状态密切相关。     

鞍钢首套焦炉烟气脱硫脱硝装置正式投入使用

正经过一个月的功能考核及168 h运行考核验收,鞍钢首套焦炉烟气脱硫脱硝装置正式投入使用,其排放物二氧化硫可达到15 mg/Nm~3以下、氮氧化物50 mg/Nm~3以下、颗粒物10 mg/Nm~3以下,满足国家对现有焦化企业污染物排放标准并达到特排要求,预计每年可脱硫146 t、脱硝263 t。     

Development and prediction of children's sociability from 1 to 2? years.

Interactions of 60 children with their mothers and female strangers were observed in natural and semistructured situations at 12, 18, 24, and 30 mo. Their behavior was analyzed to reveal a "sociability" cluster of smiling, vocalizing, and playing. When mother and stranger behaved similarly, children's sociability to both adults was similar in components, stability, development, and relation to independently assessed aspects of the social environment, with the following exceptions: Sociability to mother was not consistently related to physical contact with her, whereas sociability and physical contact with the stranger were consistently correlated. Sociability to mother developed earlier than sociability to stranger. Sociability to the mother was more related to maternal behavior than was sociability to the stranger, whereas sociability to the stranger was more related to nonparental care. Sociability to both mother and stranger was related to the child's cognitive abilities but not to contact with objects or to the mother's intelligence or socioeconomic status. (49 ref) (PsycINFO Database Record (c) 2010 APA, all rights reserved)     

Distinct regions of bacterial flagellar switch protein FliM interact with FliG, FliN and CheY

The FliG, FliM, and FliN proteins of the bacterial flagellar motor are believed to interact with one another to form the switch complex, which in turn is thought to interact with one of the chemotaxis proteins, CheY. In particular, FliM appears to be an intermediary between CheY and FliG: the current model suggests that CheY, when phosphorylated (CheY-P), binds to FliM and produces a conformational change in FliM that is propagated to FliG. The result of these interactions is to induce clockwise rotation of the flagellar motors and tumbling of the cell. Various genetic and biochemical studies have provided evidence that the switch proteins associate with each other and that CheY-P binds to FliM. Here, we have used affinity blotting to obtain direct evidence of interaction between Salmonella typhimurium FliM and FliN, FliM and FliG, and FliM and CheY-P. We have also examined the ability of various FliM deletion and truncation mutant proteins to bind to FliN, FliG, and CheY-P. From these data, we conclude that distinct regions of the FliM protein bind to each of these other proteins. We propose a model in which the N-terminal region of FliM binds to CheY-P, the middle region of FliM binds to FliG, and the C-terminal region binds to FliN.     

Transmitter-induced calcium responses differ in astrocytes acutely isolated from rat brain and in culture

Glial fibrillary acid protein (GFAP)-positive astrocytes isolated from the cerebral cortices of 3-10-day-old rats frequently showed increased intracellular Ca2+ concentration responses to L-glutamate and glutamate analogues. However, few of the acutely isolated cells responded to ATP, and no such cells responded to serotonin [5-hydroxytryptamine (5-HT)]. The same cell that failed to respond to ATP or 5-HT often responded to glutamate. Culturing acutely isolated cells in media containing horse serum decreased Ca2+ responses to glutamate but increased the responses to ATP and induced responses to 5-HT. In primary cultures prepared from the cerebral cortices of 1-day-old rats and cultured in horse serum, fewer of the cells responded to glutamate, but almost all cells responded to ATP and 5-HT. The lack of or limited response to, 5-HT or ATP in the acutely isolated cells seems unlikely to be due to selective damage to the respective receptors because acutely isolated GFAP-negative cells showed responses to ATP, several different proteases and mechanical dissociation yielded cells that also responded to glutamate but not to ATP, and exposure of primary cultures to papain did not abolish Ca2+ responses to several transmitters. The responses of the acutely isolated cells to glutamate but limited or lack of responses to ATP and 5-HT also correspond to what has been seen so far for astrocytes in situ. Thus, the present studies provide direct evidence that some of the receptors seen in primary astrocyte cultures may reflect a response to culture conditions and that, in the context of the relevant information so far available, acutely isolated astrocytes seem to reflect better the in vivo state.     

VPN技术在企业网络中的应用

随着企业网络技术的普及,员工需要随时随地联入企业网.随着企业本身发展壮大与跨国化,企业分支机构遍布世界.企业与各战略伙伴也需要随时通信.这涉及到远程安全接入企业网络.为了保证数据在网络传输时的安全,通常需要为每个分部建立独立的专用链路,这样就会造成投资大、工程难以实施.为了解决上述问题,采用了虚拟专用网(VPN,vitual private network)技术,即利用公共服务网络(如因特网)实现企业数据的安全通信和加密.     

Health care reform in Chile

This is a document presented to the Chilean Academy of Medicine by the Health Minister, the economist Carlos Massad, First of all, he refers to the general context of the reform, that he considers a process and not a breakpoint. Afterwards, he enumerates the change task: a) to generate awareness of the change and to convert health in a State issue; b) to adequate programs to population's new health profile; c) to install new management instruments in the health system; d) to decentralize decisions and to promote the participation of beneficiaries; e) to establish incentives and to flexibilize the Health System and f) to introduce correctives to private health insurance. He believes that Chile must drift to a economical protection system for universal and solidary health events. The additional assurances that people wants to buy, must be delimited.     

Why Oedipus and not Christ?: a psychoanalytic inquiry into innocence, human sacrifice, and the sacred--Part II: The numinous and spiritual dimension as a metapsychological perspective

The ancient Greek myth linking the images of the labyrinth and the Minotaur provides an allegory for Melanie Klein's conception of the archaic Oedipus complex as well as a vivid illustration of Winnicott's notions of object usage and the 'subjective object'. The labyrinth is suggestive of mother's body as the first area for an infant's exploration and putative sadistic conquest. The Minotaur, in turn, suggests the infant's unconscious phantasies about the content of mother's body, namely such projective identifications onto that body as the paternal penis and the 'internal babies'. Further, the heroic dynamic personified by Theseus in the myth of the labyrinth metaphorically signifies what is here proposed as a developmental line that involves the courage to do a number of things, including to become, to create, to seek, to explore, to do, to challenge, to undertake risks, to accept, to rescue, to initiate, to think, to know and to realize. The Minotaur can thus be thought to serve as a universal subjective signifier for an 'Object of Challenge', which, if not successfully dealt with by the ego-development of the infant, transforms that default into the 'Object of Nemesis'. Ultimately, this myth of mastery speaks to the psychoanalytic process itself as well as casting light on the transformative aspects of sexual intercourse as a personal healing ritual.     

Pollen identification

LEARNING OBJECTIVES: The purpose of this review is to introduce the reader to a systematic approach to categorizing pollen types. This will enable the reader to recognize pollen characteristics of the most common botanical sources and determine the relevant contributors to the local aeroallergen burden. DATA SOURCES: Allergenic plant and pollen atlases for pollen characteristics, allergy texts for procedures and overviews, and relevant reviews from the English medical literature (1985 to present). RESULTS: By applying a visual gestalt utilizing grain number, size, shape, surface structures, and internal detail, one is able to identify pollen source to the appropriate botanical taxonomic level. Identification may be possible only to the family or order, but most frequently to the genus, and occasionally to the species. CONCLUSIONS: Outdoor sampling allows the identification of aeroallergen burden in a locale. In conjunction with field work, the relevant sources can be identified as well as time of pollination. This allows the physician to correlate symptoms with exposure and relevant sensitization.     

硅铝铁合金中硅、铝、铁的快速测定

试样以硝酸、氢氟酸溶解后，用硼酸配位络合过量的氢氟酸，定容后，移取部分用钼蓝光度法测定硅含量。另取部分加高氯酸加热冒烟驱除去硅和氟，消除干扰，加过量的EDTA标准溶液与铝络合，用锌标准溶液滴定过量的EDTA标准溶液，加入氟化铵释放出与铝络合的EDTA，再用锌标准溶液滴定，求得铝含量。以三氯化钛一重铬酸钾滴定法测定含铁量。     

The future of psychiatric hospitals in Ontario

The purpose of this paper is to review past and present roles and to speculate on the future of the Ontario provincial psychiatric hospitals (PPHs). Currently, and for the very immediate future only, there are 10 PPHs that are owned and operated by the Ministry of Health of Ontario, each serving a specified population ranging from 250,000 to over 3,000,000. In addition to clinical expertise, provincial psychiatric hospitals contribute greatly to teaching and research. Ontario's mental health reform movement has called for a shift of resources to the community and a downsizing of PPHs by 2003. In response to fiscal pressures, in 1996 provincial legislation was passed to establish the Health Services Restructuring Commission (HSRC) as a stand-alone corporation with powers to restructure and reengineer health services in Ontario. The HSRC has to date recommended the closure of 4 PPHs by 1999 and the integration of theses services into other medical facilities. While a rebalancing of the mental health system does need to take place, the fiscally driven haste to close hospitals has created a crisis atmosphere in PPHs for staff and patients. It is also unlikely that the necessary community resources will be in place to buffer these changes. The new restructuring plans not only set unrealistic timelines, they seem to underestimate the importance PPHs have played in teaching, research and the advancement of clinical treatment and rehabilitation of the severely mentally ill. It may be that, in the long run, service integration and divestment/closure of the PPHs will result in better access to services closer to smaller communities and in the destigmatization of the mentally ill, however, without close evaluative monitoring and appropriate leadership, it could also lead to decreased research, training and quality of care.     

Changes in the somatosensory evoked potentials and spontaneous electroencephalogram of broiler chickens during exposure to gas mixtures

1. Six week-old broiler chickens implanted with electroencephalogram (EEG) recording and somatosensory stimulating electrodes were exposed to either 90% argon in air, a mixture of 30% carbon dioxide and 60% argon in air or a mixture of 30% oxygen and 40% carbon dioxide (balance nitrogen) for 2 min, to determine the times to onset of changes in spontaneous EEG and the loss of somatosensory evoked potentials (SEPs) and thus unequivocal loss of consciousness. 2. In addition, after a 2 min exposure to the carbon dioxide-oxygen mixture, some broilers were allowed to recover in air and their EEGs and SEPs were continuously recorded until the return of normal EEG and SEPs. During this period, the time to return of response to comb pinching was also determined in 10 broilers. 3. All broilers exposed to either argon or the carbon dioxide-argon mixture died within 2 min, whereas, only 3 out of 17 broilers died during the 2 min exposure to the carbon dioxide-oxygen mixture. 4. During exposure to argon, unlike the other 2 gas mixtures, the majority of broilers showed high amplitude, low frequency electrical activity in the EEG on average at 10 s. The mean times to onset of EEG suppression were 17, 19 and 40 s after exposure to argon, the carbon dioxide-argon mixture and the carbon dioxide-oxygen mixture, respectively. An isoelectric EEG occurred on average at 58 and 41 s after exposure to argon and the carbon dioxide-argon mixture, respectively. An isoelectric EEG did not occur in broilers which were exposed to the carbon dioxide-oxygen mixture. 5. The SEPs were abolished in broilers on average 32 and 24 s after exposure to argon and the carbon dioxide-argon mixture, respectively. During exposure of broilers to the carbon dioxide-oxygen mixture the SEPs were abolished in the majority of birds on average at 47 s, however, 2 out of 14 birds retained their SEPs for the entire period of 2 min exposure to this gas mixture. 6. During the recovery after exposure to the carbon dioxide oxygen mixture, response to comb pinching and SEPs returned either at the time of, or soon after, the onset of high frequency electrical activity in the suppressed EEG of broilers. The mean times to return of response to comb pinching and SEPs were 52 and 43 s, respectively. 7. Based on the time to onset of EEG suppression or loss of SEPs, exposure of broilers to either 90% argon in air, or a mixture of 30% carbon dioxide and 60% argon in air, resulted in quicker loss of consciousness than during exposure to a mixture of 40% carbon dioxide, 30% oxygen and 30% nitrogen. The time to return of consciousness after a 2 min exposure to the carbon dioxide-oxygen mixture was also found to be rapid.