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THE IMPLICATION OF CENTRAL SEROTONIN IN ELECTRO-ACUPUNCTURE TOLE

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Science in China,Ser.B 1982年第6期25卷 620-629页

作者：李思嘉汤健韩济生 Department of Physiology Beijing Medical College

Electro-acupuncture (EA) applied to both legs for 30min raised the tail flick latencyof the rat significantly. This effect of EA analgesia became attenuated and finally disap-peared after repeated EA stimulations, which was termed EA tolerance. EA tolerance and itscross tolerance to morphine analgesia were found to be partially reversed by intracerebro-ventricular injection of 5-hydroxytryptophan (5-htp), the precursor of 5-hydroxytryptamine(5-HT). However, there was no depletion in cerebral 5-HT, nor was there decrease ofthe number of 5-HT receptors in the brain of the EA tolerant animals. Results obtainedfrom different lines of analysis point to the conclusion that development of tolerance toprofoundly released 5-HT during prolonged EA stimulation may constitute one of themechanisms for EA tolerance.

关键词： htp EAA THE IMPLICATION OF CENTRAL SEROTONIN IN ELECTRO-ACUPUNCTURE TOLE

Application htp Process to Produce X80 Strip for 2nd West-East Gas Pipeline Project

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Journal of Iron and Steel Research(International) 2011年第S1期18卷 471-477页

作者： LI Yong-dong 1,LI Ming 2,ZHANG Yong-qing 1,JIN Wei 2,LIU Jian-hui 2,LI Fei 1 (1.Shougang Research Institute of Technology,Beijing100043,China 2.Qian’an Iron and Steel Company of Shougang Group,Qian’an 064400,Hebei,China) Shougang Res Inst Technol Beijing 100043 Peoples R China Qianan Iron & Steel Co Shougang Grp Qianan 064400 Hebei Peoples R China

htp practice,alloyed with low-carbon (less than 0.06%) and high-niobium (up to 0.11%),has been developed to produce large-wall X80 hot rolled strip for 2nd West-East Gas Pipeline project successfully.In this paper,existing status of niobium at different rolling stage,such as reheating,rough rolling and final product and strengthening effects have been presented and analyzed systematically.Some technological questions concerrned,such as the mixed grain occurred on the delay table,dynamic recrystallization during the finish rolling course,γ→αtransformation and final microstructure obtained at low coiling temperature,have been explored further.Analytical results presented increased recrystallization stop temperature due to high niobium contents can provide the requisite to remove waiting-temperature operation of transfer bar before finish rolling to ensure controlled effect of traditional low-temperature,which is benificial not only to production efficiency,but also to uniformity of austenite microstructure.Secondly,dynamic-recrystallization occurred during finish rolling may reduce the density of dislocation,but will better the grain gradient along the thickness because the dynamic recrystallization proceeds instantly,which is beneficial to reduce the appearance of separation of impact fracture.Finally,the lower coiling temperature than traditional TMCP practice,up to 300℃,is a key factor to obtain low-carbon bainite microstructure composed of acicular ferrite and small amount M/A component,which results in high strength and excellent low-temperature toughness.

关键词： 2nd west-east gas pipeline project X80 hot rolled strip htp high-niobium

Evolution of Microalloyed Linepipe Steels With Particular Emphasis on the “Near Stoichiometry” Low Carbon,0.10 Percent Niobium “htp” Concept

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Journal of Iron and Steel Research(International) 2011年第S1期18卷 652-657页

作者： Gray J.Malcolm Microalloyed Steel Institute Inc. 5100 Westheimer Ste 540HoustonTX 77056 USA

Microalloyed linepipe steels were first introduced in 1959 at strength levels around 52-60 ksi [1] [2].The steels were generally strengthened by niobium or vanadium used singly.As strengths levels increased to X-70 in the early 1970’s niobium and vanadium were used in combination and controlled rolling was introduced on a broad basis.Higher strengths decrease tolerance for impurities and non-metallic inclusions which required improved steelmaking practices.Sulfur,carbon,and nitrogen were reduced and continuous casting was increasingly applied which required improved ladle refining and deoxidation practices.Niobium-molybdenum steels were introduced by IPSCO in 1972 [3] and by Italsider in 1974 [4].Steels with higher niobium contents were also introduced in the early 1970’s but available steelmaking technologies limited the use of optimum niobium to carbon ratios,i.***.those approaching stoichiometry.Nevertheless the steels benefited from the effect of niobium in retarding austenite recrystallization at relatively high rolling temperatures and they developed attractive combinations of strength and toughness in old manufacturing facilities using simple (relaxed) rolling schedules.Fluctuations in the price of molybdenum and vanadium in the past decade and expanded application of API Grade X-80 linepipe,have led to more widespread use of niobium contents up to 0.11 percent,in combination with 0.02-0.03 percent carbon (near stoichiometry) thus maximizing the effects of solute niobium during rolling,in lowering transformation temperature,and thereby reducing reliance on other alloying,often expensive,elements.The history of these developments will be presented and applications of the concept will be summarized.

关键词： htp Low Carbon,0.10 Percent Niobium Near Stoichiometry Evolution of Microalloyed Linepipe Steels With Particular Emphasis on the Concept

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htp高铌钢形变奥氏体再结晶规律研究

塑性工程学报 2008年第3期15卷 119-122,131页

作者：焦多田王路兵武会宾张伟卫张鹏程唐荻任毅北京科技大学高效轧制国家工程研究中心北京100083 鞍钢集团技术中心鞍山114001

采用阶梯试样,通过光镜观察,研究了0.08%Nbhtp(High temperature processing)钢形变奥氏体再结晶规律,分析了变形温度、变形量等工艺参数对变形奥氏体再结晶百分数的影响,得出了实验钢变形奥氏体再结晶图。结果表明,变形量为60%时,试验... 详细信息

采用阶梯试样,通过光镜观察,研究了0.08%Nbhtp(High temperature processing)钢形变奥氏体再结晶规律,分析了变形温度、变形量等工艺参数对变形奥氏体再结晶百分数的影响,得出了实验钢变形奥氏体再结晶图。结果表明,变形量为60%时,试验钢的完全再结晶临界温度为1070℃,未再结晶临界温度为900℃,分别比含Nb0.04%的普通HSLA钢相应温度提高了120℃和100℃,热机械加工性能得到大幅度提高,证明了高含量Nb对奥氏体再结晶的强烈阻滞作用。

关键词：再结晶 htp 微合金元素

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高等级管线钢的发展现状

钢铁 2006年第10期41卷 1-10页

作者：郑磊傅俊岩宝山钢铁股份有限公司研究院上海201900 中信金属公司微合金钢研究中心北京100004

回顾总结了近年来国际上高等级管线钢的发展。现代管线钢向高强度、大厚度、抗应变和抗HIC方向发展。为降低长距离天然气管线的建设成本,开发了X100和X120超高强度管线管,并进行了X100和X120管线试验段建设,取得了显著的进展。开发了以... 详细信息

回顾总结了近年来国际上高等级管线钢的发展。现代管线钢向高强度、大厚度、抗应变和抗HIC方向发展。为降低长距离天然气管线的建设成本,开发了X100和X120超高强度管线管,并进行了X100和X120管线试验段建设,取得了显著的进展。开发了以双相显微组织为特征的满足“基于应变设计”的抗大应变高强度管线钢,强度等级从X65至X100,可应用于冻土带、地震区和水土流失区域的管线建设。海底管线用钢和抗HIC管线管的强度等级已从以往的X65提高到X70,X70管线管的最大壁厚可达34.1 mm,并已批量在工程中应用。新型的htp高强度管线钢采用超低碳高铌含铬的成分设计,具有十分优良的性能,用铬替代钼可显著地降低成本,生产的X80管线管已应用于美国第一条X80管线。

关键词：管线钢 X100 X120 抗应变海底管线抗HIC htp

htp工艺生产的700MPa级中厚板的组织与性能

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钢铁 2009年第8期44卷 72-75,96页

作者：侯华兴杨颖张涛刘明鞍钢股份有限公司技术中心辽宁鞍山114000

研究了高Nb超低碳贝氏体钢在htp工艺条件下轧态、回火态的组织与力学性能。采用的合金成分(质量分数)为:C 0.05%、Mn 1.85%、Nb 0.1%左右,其余合金元素有Cu、Ni、Cr、B等。进行了热模拟研究、实验室冶炼轧制和工业试制。试验结果表明,... 详细信息

研究了高Nb超低碳贝氏体钢在htp工艺条件下轧态、回火态的组织与力学性能。采用的合金成分(质量分数)为:C 0.05%、Mn 1.85%、Nb 0.1%左右,其余合金元素有Cu、Ni、Cr、B等。进行了热模拟研究、实验室冶炼轧制和工业试制。试验结果表明,第二阶段开轧温度、冷却速度和轧后高温回火工艺对钢的组织、析出物的形态和数量有明显影响。采用合适的htp工艺与轧后高温回火相结合,能够生产出屈服强度达到700 MPa级别的高强度、高韧性钢板。

关键词： htp 超低碳贝氏体钢组织性能

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htp技术在高强度特厚板生产中的应用

钢铁 2012年第2期47卷 53-57页

作者：侯华兴杨颖张哲李新玲刘明鞍钢股份有限公司技术中心辽宁鞍山114000 鞍钢股份有限公司鲅鱼圈分公司辽宁营口115000

借助于热模拟、数值模拟的方法,采用添加铌、锰、铬、硼,不含钼的低成本合金设计,通过2种铌质量分数(0.09%和0.05%)钢种的对比,探讨了htp工艺技术在厚度小于等于100mm、屈服强度大于等于600MPa级别高强度钢中的应用。试验结果表明:采用H... 详细信息

借助于热模拟、数值模拟的方法,采用添加铌、锰、铬、硼,不含钼的低成本合金设计,通过2种铌质量分数(0.09%和0.05%)钢种的对比,探讨了htp工艺技术在厚度小于等于100mm、屈服强度大于等于600MPa级别高强度钢中的应用。试验结果表明:采用htp+回火工艺,可提高钢板的未再结晶温度;改善钢板厚度方向均匀性和钢板的心部冲击韧性,钢板表面和厚度1/4处的组织多为板条贝氏体组织,芯部组织为粒状贝氏体+黑色的珠状组织。

关键词： htp 高强度未再结晶

THE APPLICATION OF SEROTONIN AND 5-HVDROXYINDOLE-3-ACETIC ACID IN THE DIAGNOSIS OF APUDOMA

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Chinese Journal of Cancer Research 1990年第4期2卷 11-15页

作者：许澍淮陈元方陈华粹陈丽英 Institute of Basic Medical Sciences Chinese Academy of Medical Sciences Beijing

In our report, the values of whole blood serotonin (5-HT) in 87 apudoma patients (diagnosed by operation and pathology) were summarized. Among them, the levels of urinary 5-hydroxyindole-3-acetic acid (5-HIAA) of 44 patients were also tested. The results showed that both parametres of apudoma patients were higher than those of non-apudoma, post-operative patients of apudoma as well as the normal. The increasing extent of the levels of whole blood 5-HT and urinary 5-HIAA in small intestinal carcihoid was the most obvious one but that of rectum was not. The referable diagnostic values suggested were: 5-HT>130 ng ml, 5-HIAA>30 mg/ 24 hours.

关键词： THE APPLICATION OF SEROTONIN AND 5-HVDROXYINDOLE-3-ACETIC ACID IN THE DIAGNOSIS OF APUDOMA htp

htp绘画心理分析法在班主任谈话工作中的应用案例分析

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中小学班主任 2023年第7期 64-66页

作者：潘彩虹广东省茂名市田家炳中学

htp绘画心理分析法是教师在绘画的基础上分析学生画面的基本要素和构图,从而了解学生的心理状态。与学生谈话是班主任的基本功之一,也是增强班主任与学生之间凝聚力的重要形式。把绘画心理分析法与班主任的谈话工作结合起来,并运用到实... 详细信息

htp绘画心理分析法是教师在绘画的基础上分析学生画面的基本要素和构图,从而了解学生的心理状态。与学生谈话是班主任的基本功之一,也是增强班主任与学生之间凝聚力的重要形式。把绘画心理分析法与班主任的谈话工作结合起来,并运用到实践中,具有深刻意义。

关键词： htp 绘画心理班主任谈话工作