腰椎间盘突出症术后复发治疗的体会

目的:探讨椎间盘突出症术后复发的原因及其治疗方法.方法:回顾性分析2004年12月一2009年12月我院腰椎间盘突出症术后复发患者27例.男15例,女12例;年龄39～53岁,平均46岁,初次手术术式:全椎板间盘切除术3例;半椎板问盘切除术8例;椎板间开窗间盘切除16例.初次手术至复发时为6-156个月,平均36个月,再次治疗的手术术式:扩大开窗及神经根管扩大减压术3例,半椎板切除术2例,椎间植骨融合及椎弓根内固定术22例.结果:本组无围手术期死亡病例,术后所有病例平均随访24个月,Oswestry评分从术前(52.32±9.17)分改善至(20.33±5.72)分.73.5%的患者满意.结论:腰椎问盘突出症术后复发患者根据影像学和临床表现及手术史,采用相应的手术方法,充分减压,可获得较满意的临床疗效.     

世界铜萃取工厂资料

厂名(国别)料液铜产量(公斤/日)Ranchers开发公司(美国)18,200CyPrus Bagdad铜公司(美国) 氧化矿稀硫酸浸出液 同上18一200Cyprus矿业公司(美国)同上13一650城市服务公司(美国)同上人namax公司(美国)N(,randa Lakeshore公司 (美国)Dlw班公司(美国)Inspiration联合铜公司(美国)     

Combustion synthesis and luminescence characteristic of rare earth activated LiCaBO3

Lithium calcium borate (LiCaBO3) polycrystalline thermoluminescence (TL) phosphor doped with rare earth (Tb3+ and Dy3+) elements was synthesized by novel solution combustion synthesis. The reaction produced very stable crystalline LiCaBO3:D(D=Tb3+ and Dy3+) phosphors. These rare earth doped phosphors material showed maximum TL sensitivity with favorable glow curve shape. TL glow curve of X-ray irradiated that LiCaBO3:Tb3+ and LiCaBO3:Dy3+ samples showed two major well-separated glow peaks. The TL sensitivity of these phosphors to X-ray radiation was comparable with that of TLD-100(Harshaw). Photoluminescence spectra of LiCaBO3:Tb3+ and LiCaBO3:Dy3+ showed the characteristic Tb3+ and Dy3+ peaks respectively. TL response to X-ray radiation dose was linear up to 25 Gy.     

几大矿业公司的总裁评估中国因素

据国外媒体报道,在2005年四五月间,国外几家大型跨国矿业公司——澳大利亚BHP-B公司、美国铝业公司(Alcoa)、智利国营铜公司(Codelco)、加拿大因科公司(Inco)的高层领导在一些高层业务会议上,谈到了中国对全球有色金属市场的影响因素问题。下面是他们对未来几十年全球有色金属市场供需情况的基本看法。BHP-B公司的总裁蔡普.古德耶(Chip Goodyear)在2005年5月11日的一次会上说:在大致三年的时间里,他的公司对中国的销售额增长了10倍。美国铝业公司的副总裁兼该公司的全球初级产品集团总裁伯恩特.雷坦(Bernt Reitan),在2005年4月6日的一…     

赛克公司线材辊底式连续退火炉投入使用

赛克（北京）工业炉制造有限公司日前组织业内部分行业媒体赴邢台采访，亲历该公司研发和生产的线材辊底式连续退火炉实际使用情况。     

水星—14型双臂液压凿岩台车

沈阳有色冶金机械总厂同法国埃姆科—赛克玛公司合作,成功研制了水星—14型双臂液压凿岩台车,于1986年9月1日在沈阳举行首批产品出厂剪彩典礼。     

Thermoluminescence glow curve analysis and kinetic parameters of Dy-doped BaSi2O5 phosphor

In this paper,Dy³⁺incorporated BaSi₂O₅phosphors were synthesized by gel co mbustion method and characterized by X-ray diffraction(XRD).The effects of various heating rate s on thermoluminescence(TL)kinetics and glow peak temperatures of Dy³⁺incorporated BaSi₂O₅phosphors exposed toβirradiation at room temperature were investigated.The glow curves of the phosphor exposed toβ-irradiation(0.1-100 Gy)consist of four main peaks located at 87,130,271,and 327℃and exhibit a good linearity between 0.1 and100 Gy.Three experimental techniques including variable heating rate(VHR),repeated initial rise(RIR),peak shape(PS)and computerized glow curve deconvolution(CGCD)were employed to determine TL kinetic parameters.Our findings indicate that the TL glow peaks of the phosphor obey first-order kinetics.Analysis of the main dosimetric peaks through the techniques mentio ned above indicates that activation energies(E)and pre-exponential factor(s)are in the range of 0.80-1.50 eV and 1.15×10⁸-3.28×10¹³s^-1.Additionally,it is found that the temperature of the glow peaks shifts toward the higher temperatures and the TL intensity smoothly decreases as the heating rate increases.The effect on the TL intensities and glow peak temperatu res of the heating rate is discussed in terms of thermal quenching.     

一般问题

美国锂工业是由美国锂公司(美国海湾资源和化学公司的子公司)和富特矿物公司(纽蒙特采矿公司的一个单位)构成。美国锂公司在探明储量为18亿磅(81.7万吨)碳酸锂的北卡罗来纳拥有一个由采矿、选矿和化学工厂组成的联合企业。其设备能力为每年3600万磅     

RMI公司决定关闭钛还原设备

美国的 RMI(活性金属工业)公司已决定关闭位于俄亥俄州阿什塔比拉的该公司的钠生产设备及钛还原设备。RMI 公司由于仰仗从公司外提供海绵钛,已与美国的俄勒冈冶金公司(Oregon Metal-lurgical)及日本的住友集团(大阪钛、住友商事、美国住友)之间签订了供给合同。由于此次决定,     

世界三大铝业集团

近年来,世界各大铝业集团进行了较大的兼并和重组工作,现将当前情况简报如下: 一、美国铝业公司(Alcoa) 美国铝业公司自从兼并了阿鲁麦斯(Alumax)和雷诺兹(Reynolds)铝业公司以后,已成为全球最大的铝业公司。该     

Synthesis and thermoluminescence properties of rare earth oxides （Y, Ce-Lu） doped lithium triborate

Lithium triborate (LiB3O5) was synthesized by high temperature solid-state reaction method, and then rare earth oxides were doped into LiB3O5 to enhance its thermoluminescent (TL) properties. The identification and characteristics of the obtained compounds were determined by X-ray diffraction (XRD), Fourier transform infrared (FTIR) analyses, differential thermal analyses (DTA) and scanning electron microscopy (SEM). The glow curves were obtained using a thermoluminescent (TL) reader. The results revealed that all the rare earth oxides were not good activators for lithium triborate and the obtained compounds could not be used for dosimetric applications.     

Synthesis,characterization and TL properties of SrSO_4:Dy,Tb nanocrystalline phosphor

SrSO4:Dy,Tb nanocrystalline with crystalline size in the range of 44–54 nm was prepared by co-precipitation method followed by thermal treatment and characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectroscopy(EDX) and UV-visible spectrometry. Our results provided direct evidence of incorporation of impurities into nanocrystalline SrSO4. The thermoluminescence(TL) properties of SrSO4:Dy,Tb nanocrystalline pellets irradiated with gamma rays at different doses were studied. The TL glow curve of SrSO4:Dy,Tb nanocrystalline pellets had a prominent peak at around 490 K and a small peak at around 430 K. The major peak in the TL glow curve was almost resolved from other peaks, which was analyzed using Chen's peak shape method to determine the TL kinetic parameters such as activation energy, E and kinetic order, b. The intensity of main dosimetric peak of SrSO4:Dy,Tb nanocrystalline pellets at around 490 K increased linearly with the increase in gamma dose. The TL response was linear in the range of 0.1–7 kGy. These properties made it a candidate as a dosimeter to be used for estimating the high dose of gamma rays.     

Sapa完成对美国鹰都铝业的收购

萨帕铝业公司(Sapa)是目前全球最大的挤压铝材生产者,2007年并购了美国铝业公司的建筑铝材挤压板块,2009年又收购了美国的鹰都铝业公司(Indalex)。鹰     

硬质合金引进设备订货情况报导

自贡硬质合金广技改工程处赴美订货组由七人组成,于1985年11月22日到美国。在一个月内,和美国的辛太克斯发展公司(SINTEX DEVELOPMENT CORP-ORATION)和五家设备制造公司进行了技术交流和商务谈判。这五家设备制造公司是:联合工业公司(UNION PROCESSINC)、保尔·奥·阿贝公司(PAUL OABBE INC)、阿尔法压机公司(ALPHAPRESS COM),真空公司(VACCUMINC)和热工艺公司布鲁分公司(THER-     

Synthesis and luminescence characteristics of terbium（III） activated NaSrBO3

The thermoluminescence (TL) and photoluminescence (PL) properties of the phosphor NaSrBO 3 :Tb 3+ were reported and discussed. The combustion technique was used for the synthesis of polycrystalline samples of NaSrBO 3 :Tb 3+ . The TL glow curve of the compound had a simple structure with a single peak at 434 K. TL sensitivity of the phosphor was found to be more than that of (LiF:Mg,Cu,P). The TL glow curve was studied as a function of concentration of dopant and dose of gamma ray irradiation. The kinetic parameters of the thermoluminescence of NaSrBO 3 : Tb 3+ were calculated employing the peak shape method. The photoluminescence (PL) properties of Tb 3+ doped in NaSrBO 3 were studied over the 200-400 nm excitation range. The excitation spectra of NaSrBO 3 :Tb 3+ consisted of single narrow band peaking at about 236 nm. The emission spectra monitored at 236 nm excitation consisted of a series of sharp lines peaking at 489, 544, 586 and 622 nm corresponding to the 5 D 4 → 7 F j (j=3,4,5,6) transitions within the 4f 8 configurations of Tb 3+ .     

国外简讯

据美国金属市场报道,美国活性金属工业公司(RMI)和苏联预定利用意大利的吉纳塔公司(Ginatta)所开发的新电解法(该法较之现行方法可降低成本30%制出高纯海绵钛)投入工业生产。RMI 公司预定在俄亥俄州的阿斯塔布拉建造年产100t 左右的钛电解工厂,1988年底启动。意大利吉纳塔公司花费10年时间研究成新的电解方法,美国 RMI 公司于1985年以2000万美元与其签订了在     

美俄组建钛公司

俄罗斯专利局标准产品协会(PO Normal Production Associates ofRussia)与美国费尔蔡尔德(Fairchild)公司在美国新泽西州组建了费尔蔡尔德钛工艺公司,该公司向美国供应各种钛材与钛零件,据称其价格比国际市场上的低得多。供应的品种有:紧固件、锻件、挤压材料、管     

美国耶茨工业公司的铜箔生产

应美国耶茨工业公司的邀请,上海冶炼厂铜箔考察小组一行五人,于一九八七年一月九日至一月廿四日,前往卢森堡大公国和美国,对耶茨工业公司所属的卢森堡威尔茨(WILTS)铜箔工厂、美国新泽西州的波定镇(BORDENTOWN)铜箔工厂和加利福利亚州的朴蒙特(BEAUMONT)铜箔工厂进行了考察。并参观了耶茨工业公司的用户之     

颈椎椎弓根标本与CT图像测量椎弓根相关径线结果的比较

目的:比较颈椎椎弓根标本与CT图像测量椎弓根相关径线的差异,为临床颈椎椎弓根置钉手术前CT图像对椎弓根相关径线测量结果的临床应用提供依据.方法:分别在27具中国成人干燥颈椎(C3～C7)标本和CT图像上测量椎弓根高度(PH、PH′)、宽度(PW、PW′)、椎弓根轴线的骨性通道全长(TL、TL′)、两种椎弓根长度(PL1、PL2,PL1′、PL2′)进行线性测量,比较标本测量结果与CT测量结果两组数据的差异.结果:在同侧颈椎标本或CT图像上,不同节PW(PW′):C3、C4＜C5、C6(P<0.05),C5、C6＜C7(P<0.01);PH(PH′):各节之间差异无统计学意义;TL、PL1和PL2(TL′、PL1′和PL2′):不同节间差异无统计学意义;在同一颈椎标本或CT图像上,相同节段PW(PW′)＜PH(PH′)(P<0.01﹚,PL1(PL1′)＜PL2(PL2′)(P<0.01).CT图像上各径线的测量值与对应标本测量值差异无统计学意义(P>0.05).结论:颈椎标本与CT图像测量椎弓根相关径线结果无明显差异,提示术前CT图像测量对颈椎成功置钉手术可提供可靠的参考依据.     

世界三大铝业公司包装材料发展策略

1 美国铝业公司(Alcoa)要当包装材料的领头羊 已经是世界最大的铝生产商的美国铝业公司(Alcoa,美铝公司)意欲将自己变成为世界10大包装材料生产商之一,并且计划在18～24个月内要实现自己的目标。 美国铝业公司的执行副总裁、该公司包装材料生产集团总裁小威廉·E·利黑(William E LeaheyJr),介绍了美铝公司包装材料生产的发展壮大历程及其发展策略。