首页 | 本学科首页   官方微博 | 高级检索  
相似文献
 共查询到20条相似文献,搜索用时 140 毫秒
1.
多种肿瘤标记物用甲状腺癌测定的资料尚不多见,我们选择三种分布较广的肿瘤标记物CEA、Fe-P、LDH.R对110甲状腺癌患者进行联合连续测定,测定CEA、Fe-P用ELISA法,LDH.R用聚丙烯酰胺凝胶电泳法,结果其阳性率CEA55.4%,Fe-P509%,LDH.R46.3%,综合阳性率8089%,LDH中34%患者血清电泳图谱中出现一条异常区带(LDH-X),经有效治疗,CEA、Fe-P下降,LDH.R回升。本实验经CEA、Fe-P、LDH.R联合测定,提高其检测率,能提示预后,可作为β2微球蛋白甲状腺癌血清学协同的诊断,提高其诊断率  相似文献   

2.
抗—HCV阳性单采浆供血员HGV感染随访研究   总被引:3,自引:0,他引:3  
为了解单采浆供血员庚型肝炎病毒(HGV)感染及其转归,对102名抗-HCV阳性单采浆供血员冻存血清进行抗-HGV和HGVRNA检测,对抗-HGV和(或)HGVRNA阳性者作3年随访研究。采用EIA法检测抗-HGV,包被抗原来自HGV不同功能区的合成肽。应用RT-PCR法检测HGVRNA,引物选自HGVNS3区。结果表明,抗-HCV阳性单采浆供血员HGVRNA阳性率为19.61%(20/102),抗-HGV阳性率为17.65%(18/102),HGV感染率(抗HGV和/或HGVRNA阳性)为24.51%(25/102),而对照组仅为0.94%(1/106)。提示单采血浆是HGV感染的重要危险因素。HGVRNA和抗-HGV的3年阴转率分别为35.00%(7/20)和11.11%(2/18),说明HGV感染有慢性携带趋势  相似文献   

3.
PAPP—A检测对孕早期DS胎儿筛查的应用   总被引:2,自引:0,他引:2  
PAPP-A是孕早期DS筛查的有效母体血清标志物,时间分辨荧光免疫分析是目前检测PAPP-A的有效检测技术。单项PAPP-A测定结合年龄对孕早期DS的检测效果上档甚或要好于β-hCG(分别为41%~52.5%、25%~41.8%)。PAPP-A、β-hCG、AFP和uE3等血清标记物的多联检测有助于提高检出率,PAPP-A+β-hCG双联检测被认为是孕早期DS筛查的最佳血清标记物组合,检出率为55~69.1%,血清标记物多联检测加NT检出率明显提高,其中以PAPP-A+β-hCG+NT实际临床应用价值最大,检出率高达75.8%~86.4%。  相似文献   

4.
应用庚型肝炎病毒(HGV)多肽抗原和PCR引物,对我国部分地1049例职业献血员进行了HGV抗体和HGVRNA检测。抗-HGVIgG阳性率为3.53%(37/1049)。5条抗原多肽反应性不同,检测结果有交叉和重叠。其特异性较好,除SP2外,阻断率均在90%以上。37例抗-HGVIgG阳性者中,HGVRNA阳性率为43.24%(16/37)。证明在我国职业献血员中存在着较高的HGV感染率。  相似文献   

5.
用吐温80-乙醚(TE)法、蔗糖-丙酮(SA)法、丙酮-乙醚(AE)法分别从肾综合征出血热病毒(HFRSV)感染的Vero-E6细胞培养和乳小白鼠脑组织中制备病毒血凝素(HAN),定量对比证明其制备效果,结果无明显差异。粗制HAN经高压液相色谱(EPLC)纯化,有4个洗脱峰,血凝活性物质存在于峰1。纯化HAN在SDS-PAGE中呈单一区带,分子量56.6KD,HAN相对含量79.6%。纯化HAN在蔗糖密度梯度液中有一条1.15~1.16g/cm3的沉淀,粗制HAN有3条沉淀。电镜观察纯化HAN中为大小相等的球状颗粒。粗制HAN的高密度沉淀中可见到病样颗粒。对几种常用消毒剂、氧化剂、去垢剂对HAN的灭活作用做了实验对比观察。  相似文献   

6.
N-端融合蛋白对重组HBeAg抗原性的影响   总被引:1,自引:0,他引:1  
目的 研究 N- 末端融合蛋白对大肠杆菌中表达的 H Be Ag 抗原性的影响。方法 用 P C R 法,从抗- H Bc( + ) 血清标本中获得 H B V Pre c - c 基因片段,将其插入质粒 Trc99 A,重组成亚克隆 P H B I。以 P H B I为模板,扩增获得编码乙肝病毒核心蛋白1 ~140 氨基酸的基因片段,加上终止信号,分别插入质粒p G E X- 2 T 和 Trc99 A 中,各自转化后,以 I P T G 诱导,大肠杆菌表达插入基因。以 E L I S A 和 S D S- P A G E 方法测定表达产物的分子量和 H Be Ag 、 H Bc Ag 滴度。结果 在 I P T G 诱导下,大肠杆菌中分别表达 N- 端融合的 G S T- H Be Ag 融合蛋白和非融合 H Be Ag 蛋白。分子量各为41000 D 和15000 D。培养裂解物经 E L I S A 测定,融合蛋白 H Be Ag : H Bc Ag 的滴度比为256 :1 ,非融合蛋白为16 :1 。结论  N- 端融合蛋白 G S T- H Be Ag 抗原性更接近血清 H Be Ag 。  相似文献   

7.
对一起甲型肝炎水型暴发流行疫区人群1428例进行肝功能(SGPT、SIBIL)和抗-HAVIgM普查。结果异常者235例,符合急性肝炎诊断的129例,占9.03%;抗-HAVIgM阳性114例,占7.98%;单项SGPT增高103例,占7.20%;SGPT合并STBIL异常87例,占6.09%;抗-HAV-IgM阳性全并SGPT、STBIL异常的69例,占4.8%;单面抗-HAVIgM阳性3例,占  相似文献   

8.
采用SEM/EDXS和XPD检测不同变质期3种煤尘的化学元素和矿物成分.将不同浓度的煤尘作用于大鼠肺泡巨噬细胞(AM),测定粉尘-AM上清液中PGE2、MDA、LDH含量和细胞存活率。将煤尘和标准石英作用过的粉尘-AM上清液,再作用于成纤维细胞。选用3H-TdR同位素掺入法、MTT法和放射自显影法,检测2BS细胞的增殖能力;对二甲氨基苯甲酸法测定2BS细胞胶原合成;在透射电镜下,观察2BS细胞超微结构变化.并测算其粗面内质网的扩张程度.结果显示:3种煤尘细胞毒性大小顺序A>M>F,并不与其致纤维化效应强弱的顺序(F>A>M)相一致。这可能与其矿物成分有关。  相似文献   

9.
应用酶联免疫吸附试验(ELISA)检测人工合成HCV核心区多肽(HCV-P(25))的抗原性,结果表明:P(25)优于参照CP(10)和SP序列合成的多肽片段,与美国第二代抗-HCVELISA试剂盒比较,敏感度为92.59%.特异度为94.44%,总符合率为93.33%。用其检测输血后肝炎,其结果与国内第二代抗-HCVELISA基本相同.但优于C100-3.且重复性和线性均较好。因此.可单独或合并非结构区抗原用于抗-HCV检测  相似文献   

10.
选择广西不同地市的肝病患者103例(AH8、CAH36、CPH36、LC7、HCC16)和献血员355例进行Anti-HCV阳性率、HCVSerotype和Genotype的分子生物学研究。结果表明:肝病患者Anti-HCV阳性12例(AH1/8。CAH2/36。CPH9/36。LCO/7、HCC0/16),阳性率为11.65%,明显高于同室检测兰州和南京肝病患者的Anti-HCV阳性率4.3%和4.2%(P<0.01);240例献血员中检出Anti-HCV阳性11例(4.58%),明显低于同室检测兰州献血员的Anti-HCV阳性率35.00%(P<0.01);本文两组的Anti-HCV阳性率也存在显著性差异(P<0.01)。肝病患者组的HCVSerotpye1型、2型、1+2型和无法定为1和/或2型者分别为33.33%、0、0和66.67%;而献血员组的HCVSerotype分别为65.95%、1.10%、2.20%和30.77%。此外,肝病患者组的HCVGenotype均属lb型(50.00%)和lb混合型(50.00%);献血员组的HCVGenotype中la型、lb型、lb混合型和无法定为1和/或2  相似文献   

11.
不同产地芦荟中锗的光谱分析   总被引:2,自引:0,他引:2  
目的 对不同产地库拉索芦荟中有机锗含量进行分析。方法 以CTMAB为增溶剂 ,在酸性条件下使锗—苯芴酮络合物稳定地保持在水相中 ,用光谱分析法测定芦荟中有机锗含量。结果 线性范围为 0~ 0 7μg ml;方法回收率为 98 1%~ 99 0 % ,变异系数小于 1 8%。  相似文献   

12.
目的 建立工作场所空气中氢化锗原子荧光测定方法.方法 活性炭管采样,硝酸解吸过滤,原子荧光光谱仪检测.结果 浓度在0.85~300.00 μg/L范围内线性关系良好,相关系数r=0.9993;最低检出限和最低检出浓度为0.51 μg/L和0.000 17 mg/m3(以采集48 L空气样品计),加标回收率为90%~106%;用相对标准偏差表示批内精密度为3.3%~5.9%,批间精密度为3.7%~6.3%.结论 该方法线性范围宽,灵敏度高,精密度好,适用于工作场所空气中氢化锗的测定.
Abstract:
Objective An atomic fluorescence (AFS) method was developed to determine germanium hydride in the air of workplace.Method Germanium hydride in the air of workplace was collected by charcoal tube,and desorbed by nitric acid followed filtration with 0.22 μm cellulose filter,the AFS was used to determine Germanium in the desorbed solution.Results The linear was good at the range of 0.85~300 μg/L with the correlation coefficient of 0.9993;the LOD and LOQ were 0.51 μg/L and 0.000 17 mg/m3,respectively.The recovery was ranged from 90% to 106%,the RSD of intra- and inter- precision were 3.3%~5.9% and 3.7%~ 6.3%.Conclusion The linear range,sensitivity and precision of the method were all satisfied for the determination of germanium hydride in the air of workplace.  相似文献   

13.
目的:建立石墨炉原子吸收分光光度法测定全血中锗的方法。方法:样品无需处理,以0.1%Tri-tonX-100/0.2%HNO3(v/v)为稀释液,以0.5 mg/ml硝酸钙为基体改进剂,对血液适当稀释后,直接用石墨炉原子吸收分光光度法测定锗的含量。结果:方法最低检出限(n=10)为0.75 mg/L,线性范围为0μg/L~190μg/L,相对标准偏差0.8%~3.2%,回收率为99.5%~103.6%。结论:方法具有简便、快速、回收率高、精密度高的优点,适用于全血中锗含量的测定。  相似文献   

14.
硒锗联合对酒精致大鼠肝脏脂质过氧化的影响   总被引:10,自引:1,他引:9  
杨成峰  陈学敏 《营养学报》1996,18(3):292-299,337
采用体外和体内实验以酒精诱导大鼠肝脏脂质过氧化为模型,研究了(Na_2SeO_3)和锗(羧乙基锗倍半氧化物,Ge-132)联合应用的协同抗氧化作用。结果表明,酒精在体外和体内均可导致大鼠肝脏脂质过氧化。体外研究发现将硒和锗同时使用时(Na_2SeO_3,20μmol/L+Ge-132,10.5mmol/L),表现出比使用相同剂量单一的硒Na_2SeO_3,20μmol/L)或锗(Ge-132,10.5mmol/L)具有更强的抗氧化作用。体内研究将硒和锗剂量减半同时使用(Na_2SeO_3,0.055mg/kg+Ge-132,100mg/kg),具有类似如单一的较高剂量硒(Na_2SeO_3,0.11mg/kg)的抗氧化作用和比使用单一的较高剂量锗(Ge-132,200mg/kg)更强的抗氧化作用。本次研究结果表明硒(Na_2SeO_3)和锗(Ge-132)在体外及体内均具有协同抗氧化作用。  相似文献   

15.
苯芴酮分光光度法测定马鞭草中锗含量   总被引:2,自引:0,他引:2  
以十六烷基三甲基溴化铵(CTAB)为增溶剂,在酸性条件下使有机锗—苯芴酮络合物稳定地保持在水相中,采用光谱分析法测定不同产地马鞭草中有机锗的含量。结果表明,方法的线性范围为0.1~0.7μg/ml,回收率为98.5%~100.1%,变异系数≤1.7%(n=6),测定结果准确可靠。  相似文献   

16.
A study was undertaken to evaluate the performance of an advanced design broad energy germanium detector for the in vivo measurement of radionuclides in lungs. Relative counting efficiency, background, and sensitivity for lung counting arrays consisting of four, three, and two 80-mm-diameter by 20-mm-thick (80 x 20 mm) broad energy germanium detectors were simulated by collecting spectra with the single 80 x 20 mm broad energy germanium at each of four locations over a humanoid torso phantom. Regions of interest were evaluated for photon energies ranging from 17 to 1,500 keV. The 80 x 20 mm detector arrays were then benchmarked against a standard array of four 70-mm-diameter by 20-mm-thick (70 x 20 mm) broad energy germanium detectors. Since testing new equipment can be an expensive and time consuming process, an alternative approach, using Monte Carlo simulations instead of physical measurements, was also evaluated and compared to experimental data. With this approach, counting efficiency and minimum detectable amount were simulated for two sizes of germanium detectors (70 mm and 80 mm diameter) at four different crystal thicknesses (15, 20, 25, and 30 mm). For the experimental measurements, arrays consisting of three and four 80 x 20 mm broad energy germanium detectors resulted in an increase in counting efficiencies, relative to the standard array, at all photon energies. The greatest relative increase was observed for the four-detector array (24-35%). In contrast, counting efficiency decreased, relative to the standard array, by 24-28% with a two-detector array. Arrays consisting of two and three 80 x 20 mm broad energy germanium detectors resulted in decreased relative background at all photon energies, with the exception of the 946 keV photon for the three-detector array. The most significant decrease in background occurred with the two-detector array (28 to 40%), while background was increased by 18-43% for the four-detector array. Arrays consisting of three and four 80 x 20 mm broad energy germanium detectors resulted in increased relative sensitivity at all photon energies. The three-detector array provided the greatest sensitivity at photon energies below 344 keV. The four-detector array provided slightly better measurement sensitivity at photon energies greater than 344 keV. The two 80 x 20 mm detector array provided sensitivity unexpectedly comparable to the standard array. Monte Carlo predictions on how size affects counting efficiency and minimum detectable amount agreed well with the experimental results. From the Monte Carlo predictions, the effect of detector thickness on counting efficiency was unimportant at photon energies up to 60 keV and independent of detector diameter. At higher photon energies for both detector diameters, the counting efficiency decreased as the thickness decreased. The values of minimum detectable amount for the 70-mm and 80-mm diameter detectors did not differ by more than 15% at 17 keV or 20% at 60 keV when compared to detectors of equivalent thickness. Minimum detectable amount increased slightly at 17 keV and rose by approximately 52% at 660 keV, with decreases in thickness from 30 mm to 15 mm.  相似文献   

17.
目的确定球拟酵母富集锌、铜、硒和锗4种元素的最佳培养条件,获得富含多种微量元素的干酵母。方法运用正交试验研究球拟酵母富集微量元素的发酵条件;经过滤、洗涤和干燥,获得复合微量元素的干酵母,并运用ICP-MS检测干酵母中多种元素的含量。结果球拟酵母最佳培养条件为加锌量600μg/ml,加铜量67μg/ml,加硒量25μg/ml,加锗量60μg/ml,培养时间72 h,温度30℃,接种量15.00%。此条件下培养的球拟酵母菌含锌元素浓度为226.85μg/g,铜元素浓度为580.58μg/g,硒元素浓度为23.41μg/g,锗元素浓度为9.54μg/g。干酵母中还含有多种机体必需的微量元素,有害元素含量较低。结论球拟酵母菌株能够同时富集锌、铜、硒和锗4种元素,在最佳培养条件下能够获得富含多种微量元素的干酵母。  相似文献   

18.
目的研究氧化锗(GeO2)对氯化镉(CdCl2)致小鼠脑胆碱酯酶(AchE)及单胺类神经递质变化的影响.方法将64只健康昆明种小鼠随机分为8组,雌雄各半,单纯镉染毒组分别隔日腹腔注射0.3、0.6、1.2 mg/kg CdCl2(奇数天)和等体积生理盐水(偶数天),CdCl2 GeO2组分别为0.3mg/kg CdCl2 25mg/kg GeO2、0.6mg/kg CdCl2 25mg/kg GeO2、1.2mg/kg CdCl2 25mg/kg GeO2(奇数天注射CdCl2,偶数天注射GeO2),连续染毒20d,第21~30天每日注射等体积生理盐水.同时设单纯GeO2染毒组(奇数天注射生理盐水,偶数天按25mg/kg注射GeO2,连续30 d).生理盐水组小鼠每日腹腔注射生理盐水,10ml/kg,共30d.采用碱性羟胺法测定小鼠脑中AchE活力,荧光法测定小鼠脑中单胺类神经递质去甲肾上腺素(NE)、多巴胺(DA)、5-羟色胺含量(5-HT).结果与生理盐水组比较,0.3、0.6、1.2mgkg单纯CdCl2染毒组小鼠的脑组织AchE活力明显降低(P<0.05),同时给予25mg/kg GeO2可缓解此种变化.与生理盐水组比较,CdCl2染毒组脑组织NE、DA、5-HT含量明显下降(P<0.05或P<0.01),25mg/kg GeO2拮抗了这种变化.结论GeO2可保护CdCl2所致小鼠脑组织神经生化改变.  相似文献   

19.
[目的]建立测定有机锗营养液中有机锗与无机锗含量的新方法。[方法]利用阴离子交换树脂装填的色谱柱,分离有机锗营养液中有机锗与无机锗,洗脱液引入石墨炉原子吸收分光光谱仪进行测定,同时测定有机锗与无机锗。[结果]选定了最佳分离和测量条件,无机锗测定相对标准偏差为3.25%~4.93%,回收率为85.0%~105.0%。有机锗测定相对标准偏差为2.85%~8.04%,回收率为86.5%~97-3%。[结论]该法灵敏度、精密度均能满足检测工作的需要。适用于一般有机锗营养液中有机锗与无机锗的测定。  相似文献   

20.
Toxic side effects of germanium dioxide contained in drugs that promote health, include nephropathy, anemia and peripheral neuropathy. Although the neuropathy, which we are interested in, is believed to occur in the patients taking excessive amounts of germanium dioxide, the pathogenesis of such neuropathy is not well understood. Therefore, we studied whether germanium dioxide causes the degeneration of the peripheral nerve in rats and monkeys. Our results showed that in rats, germanium dioxide administered orally and intraperitoneally, 100 mg/kg per day, 3 days a week for 8 weeks and 400 mg/kg per day, once a week for 8 weeks, respectively, did not produce a degeneration of myelinated fibers in teased fiber preparations and Epon-embedded sections of the peripheral nerve. In two monkeys also, germanium dioxide, administered orally, 30 to 40 mg/kg per day, 5 days a week for 8 months, did not produce a degeneration of myelinated fibers of the sural nerve on biopsy, although our results revealed proteinuria and elevated blood urea nitrogen. Further studies are warranted to elucidate the pathogenesis of germanium dioxide induced neuropathy.  相似文献   

设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号