血清降钙素原、C反应蛋白及白细胞计数在儿童感染性疾病中的诊断价值

目的:探讨检测血清降钙素原、C反应蛋白和白细胞计数在儿童不同病原体感染性疾病中的诊断价值。方法:选取我院儿科收治的感染性疾病患儿132例,根据病原学检测结果分为细菌感染组56例,病毒感染组36例和肺炎支原体感染组40例,对三组患儿分别测定血清降钙素原(PCT)、C反应蛋白(CRP)和白细胞计数(WBC),比较检测结果在儿童感染性疾病诊断中的优势。结果:细菌感染组患儿血清PCT、CRP、WBC水平均较病毒感染组患儿显著升高(P0.05),PCT、WBC水平显著高于支原体感染组患儿高(P0.05);支原体感染组CRP水平显著高于病毒感染组(P0.05)。PCT在诊断细菌感染时灵敏度、特异度、阳性预测值、阴性预测值及约登指数均明显高于CRP和WBC。结论:PCT在诊断细菌性感染时具有更好的灵敏度、特异度及准确性,对鉴别儿童感染性疾病具有一定的指导价值,对于血清PCT水平明显升高的患儿,要高度注意其细菌感染的可能。     

CD64指数与PCT、CRP联合检测在呼吸道感染疾病中的诊断价值

目的探讨中性粒细胞CD64指数、降钙素原(PCT)、C-反应蛋白(CRP)对呼吸道细菌感染性疾病的诊断价值。方法采集已确诊的40例呼吸道细菌性感染患者血样和40例呼吸道病毒性感染患者血样做为实验组,40例经体检合格的健康者做对照组。应用流式细胞术检测CD64指数、免疫荧光法检测PCT、免疫散射比浊法检测CRP,并对其结果进行比对分析,应用受试者工作特征曲线(ROC曲线)分析三种指标在呼吸道细菌感染中的诊断价值。结果细菌感染组CD64指数、PCT、CRP指数均值均明显高于对照组(P0.05),病毒感染组只有CRP与对照组差异有统计学意义(P0.05)。细菌感染组中CD64指数、PCT、CRP阳性率均高于对照组,分别为75.0%、72.5%、55.0%,病毒感染组只有CRP阳性率高于对照组。ROC曲线显示:CD64指数、PCT和CRP曲线下面积分别是0.859、0.793、0.675;灵敏度分别是90.0%、88.0%、83.0%;特异度分别82.0%、78.0%、74.0%。结论 CD64指数、PCT、CRP均可作为检测呼吸道细菌感染性疾病的指标。CD64敏感性和特异性最高,CRP敏感性与特异性最低。CD64指数、PCT和CRP联合检测可显著提高呼吸道感染性疾病的诊断灵敏度和特异度,对诊断和鉴别诊断具有重要意义。     

血清降钙素原与C反应蛋白对感染性疾病的诊断价值分析

目的:探讨血清降钙素原与C反应蛋白对感染性疾病的诊断价值。方法:将我院收治的142例感染性疾病患者根据疾病种类分为细菌感染组以及病毒感染组,分别检测两组患者PCT、CRP水平。结果:细菌感染组患者CRP、PCT水平相对于病毒感染组患者均明显升高(P0.05)。细菌感染组患者CRP阳性率(71.8%)、PCT阳性率(93%)均明显高于病毒感染组患者40.8%、15.5%,差异对比存在统计学意义(P0.05)。结论:感染性疾病患者进行PCT检测的效果相对于CRP检测更为理想,可以将血清PCT作为临床诊断感染性疾病的重要标志物指标,为病毒感染以及细菌感染患者诊断提供重要的科学依据。     

降钙素原和超敏C-反应蛋白在病毒和细菌感染早期鉴别中的临床应用

为探讨降钙素原(PCT)和超敏C-反应蛋白(hs-CRP)在病毒感染和细菌感染患者鉴别诊断中的价值,对我院276例患者,包括病毒感染组(64例)、细菌感染组(164例)和非感染组(48例)进行降钙素原和超敏C-反应蛋白水平的检测,并对三组间的差异进行分析。结果显示,细菌感染组和病毒感染组PCT、hs-CRP水平显著性高于非感染组(p<0.05);细菌感染组PCT、hs-CRP水平显著性高于病毒感染组(p<0.05)。工作特征曲线及Logistic回归分析结果显示,PCT在鉴别诊断细菌感染和病毒感染的效果高于hs-CRP。研究结果表明,降钙素原、超敏C-反应蛋白可对病毒感染和细菌感染进行早期的鉴别诊断,而降钙素原的效果较好。     

三项血清学检查联合应用对 老年菌血症早期诊断的价值

目的 探讨C-反应蛋白(CRP)、降钙素原(PCT)和血清样淀粉蛋白A(SAA)对于老年菌血症早期诊断的价值。方法 选择2016年12月至2018年11月我院收治的老年感染患者140例(年龄≥65岁)为研究对象,按血培养结果分为菌血症患者(60例)和非菌血症患者(80例);选择同期健康体检者60例(年龄≥65岁)为对照组,测定全部研究对象血清CRP、PCT和SAA水平及阳性率。结果 与对照组比较,菌血症和非菌血症患者血清CRP、PCT和SAA水平均显著升高(P0.05);且菌血症患者这3项指标水平高于非菌血症者(P0.05)。在单项检测中,PCT的敏感性和特异性最高。3项联合检测的诊断价值高于单项检测。由G~-菌引起的菌血症患者这3项指标水平高于G~+菌菌血症患者(P0.05)。结论 血清CRP、PCT和SAA这3项指标对老年菌血症的早期诊断具有一定价值。     

PCT和CRP在感染性疾病诊断中的临床意义

目的:探讨PCT、CRP在感染性疾病诊断中的价值,评价两者与感染类型的相关性。方法:回顾性统计分析420例发热待查的患者血清PCT,血浆CRP浓度与感染的关系,采用胶体金法检测血清中PCT的浓度,免疫荧光比色法检测血浆中CRP浓度,血培养及血清学的方法检测感染是否存在及感染类型。结果:通过血培养或血清学鉴定出132例存在细菌感染(细菌组),病毒感染103例(病毒组),细菌病毒混合感染76例(混合感染组),109例阴性(非感染组)。PCT在细菌组水平最高(20.6±6.7)μg/L,非感染组水平最低(8.7±2.3)μg/L,四组间差异有统计学意义(F=34.69,P0.05)。CRP在混合组中水平最高(18.1±3.7)mg/L,在非感染组水平最低(5.8±1.7)mg/L,四组间差异有统计学意义(F=23.55,P0.05)。PCT对细菌感染检测的敏感度为92.7%,特异度为63.2%。PCT对病毒感染检测的敏感度为78.7%,特异性为46.0%。细菌感染组、病毒感染组和混合感染组血清CRP和PCT均呈正相关(P=0.000.05)。结论:细菌感染的PCT、CRP血清浓度明显高于病毒感染,两者对细菌感染患者的特异性均明显高于病毒感染,细菌感染PCT血清浓度较CRP变化敏感。     

降钙素原与C反应蛋白检测在新生儿感染中的临床意义

目的探讨血清降钙素原(PCT)、C-反应蛋白(CRP)在新生儿感染性疾病中的临床意义。方法 2015年1月至2015年6月期间,我院90例新生儿感染性疾病(35例重症感染伴全身症状、55例局部感染但无全身症状),根据细菌培养、血清学检验,将其分为细菌感染组(57例)、非细菌感染组(33例),并比较血清PCT、CRP水平,另选取同期30例非感染性疾病新生儿作为对照组研究对象。结果与对照组相比,重症感染组、局部感染组的血清CRP、PCT、白细胞计数水平明显升高(P0.05);与局部感染组相比,重症感染组血清CRP、PCT、白细胞计数水平明显升高(P0.05);与非细菌感染组相比,治疗前细菌感染组血清CRP、PCT浓度均明显升高(P0.05);与治疗前相比,治疗后细菌感染组血清CRP、PCT浓度明显降低(P0.05)。结论 CRP、PCT检测有利于新生儿感染性疾病的早期诊断及疗效评估,动态监测感染程度及控制情况。     

新型冠状病毒肺炎患者血清SAA、ESR、CRP检测结果分析

目的:分析新型冠状病毒肺炎(COVID-19)患者血清淀粉样蛋白A(SAA)、血沉ESR(ESR)、C-反应蛋白CRP(CRP)的临床价值。方法:以我院2020年1月至2020年2月确诊的COVID-19患者51例为实验组:其中重症患者21例,轻症患者30例,选取非感染患者30例为对照组。分析新型冠状病毒肺炎(COVID-19)患者血清SAA、ESR、CRP水平以及临床价值。结果:实验组SAA、ESR、CRP水平高于对照组(P0.05);重症组SAA、ESR、CRP水平高于轻症组(P0.05),由ROC曲线得知SAA、ESR、CRP预测COVID-19的AUC小于三者联合预测的AUC。结论:COVID-19的SAA、ESR、CRP水平会升高,三者联合预测为疾病评估、预测疾病发展的提供依据,值得临床进一步推广应用。     

血清降钙素原(PCT)在新生儿感染中的临床应用价值

目的:探讨血清降钙素原(PCT)、C反应蛋白(CRP)、淀粉样蛋白(SAA)、外周血白细胞计数(WBC)及中性粒细胞比例(N)在新生儿感染中的临床应用价值。方法:随机选取2015年10月~2017年6月在我院治疗并确诊感染的出生三日内的新生儿106人,以及未感染新生儿57人,将其分为未感染组、一般感染组及败血症组,比较其血清PCT、CRP、SAA、WBC及中性粒细胞比例。结果:败血症组的N、PCT均高于未感染组(P0.05),而败血症组的WBC高于或者低于未感染组(P0.05);一般感染组的N、PCT均高于未感染组(P0.05);败血症组PCT高于感染组(P0.05)。WBC、N、PCT用于鉴别诊断一般感染和败血症的ROC曲线的曲线下面积依次为0.551、0.580、0.815,当PCT的值设为6.785 ng/mL时,其鉴别诊断一般感染和败血症的灵敏度50.0%,特异度为97.7%。结论:PCT对于诊断败血症有较高的诊断价值,能有效鉴别一般感染和败血症,中性粒细胞比例和白细胞在诊断细菌感染方面是PCT的补充,三者联合诊断可以提高新生儿细菌感染的诊断准确性。     

急性呼吸道感染患儿白细胞计数、内毒素、C 反应蛋白水平变化及 临床意义

目的:探讨急性呼吸道感染患儿白细胞(WBC)计数、血清内毒素(ET)、C反应蛋白(CRP)水平变化及临床应用价值。方法:对急性呼吸道感染组106例患儿(细菌感染组62例、病毒感染组44例)进行WBC计数、血清ET、CRP水平等指标进行检测,并与正常对照组的40例健康儿童进行比较分析。结果:急性呼吸道感染组患儿WBC计数、血清ET、CRP水平均显著高于正常对照组,差异具有统计学意义(P<0.05或P<0.01);血清ET、CRP水平对诊断脓毒症的敏感性差异无显著性(P>0.05),均显著高于WBC计数,差异具有统计学意义(P<0.05);WBC计数特异性显著高于ET、CRP水平,ET水平特异性显著低于CRP,差异均具有统计学意义(P<0.05);细菌感染组患儿血清ET、CRP水平显著高于病毒感染组,差异具有统计学意义(P<0.05),而两组间WBC计数差异不显著(P>0.05)。结论:测定WBC计数、ET、CRP对急性呼吸道感染患儿具有一定的诊断价值。     

六种藓类植物茎的比较解剖学研究

通过对6种藓类植物,即褶叶青藓(Brachythecium salebrosum(Web.et Mohr.)B.S.G.)、湿地匐灯藓(Plagiomnium acutum(Lindb.)Kop.)、侧枝匐灯藓(Plagiomnium maximoviczii(Lindb.)Kop.)、大凤尾藓(Fissidensnobilis Griff.)、大羽藓(Thuidium cymbifolium(Doz.et Molk.)B.S.G.)和大灰藓(Hypnum plumaeforme Wils.)嫩茎和老茎的石蜡切片和显微观察发现,同一藓类植株的嫩茎和老茎,茎结构稳定,不同种藓类植物茎横切面具有不同特征.植物体茎横切面形状、表层细胞的层数、细胞大小和细胞壁厚薄、皮层细胞大小和形状、中轴的有无以及比例等特征可以作为藓类植物的分科分类依据之一.     

Cause of Senescence of Nine Sorts of Flowers

The levels of endogenous phytohormones and respiratory rate in nine sorts of flowers such as Cymbidium faberi Rolfe, Nopalxochia ackermannii Kunth and others were investigated both at full bloom and senescence and meanwhile the effect of exogenous phytohormones on prolonging the blossoms and promoting ethylene production were tested. There is a high content of endogenous ethylene in all the long-lived flowere, about 3–16 folds higer than the short-lived ones. There is a high level of ABA at full blooming flowers of short-lived flowers, in which there is no or only some cytokinins in it, but the ratio of CTK (6BA+zeatin)/ABA is smaller(l.7). The endogenous ABA reached a much higher level at senescence in all nine sorts of flowers, so it is reasonable to consider that it is ABA which plays an important role of regulation in controlling flower's senescence. There is a much higher level of GA3 and zeatin in the long-lived flowers which is not demonstrated in the shortlived ones. The respiratory rate is one of the factors controtling the longevity of flowers, but it does not play a decided role. Application of 6BA and zeatin prolongs distinctly orchid’s longevity, however exogenous IAA through the promotive action on ethylene production, evidently extends the longevity of the flowers of the Nopalxochia ackermannii Kunth.     

龙胆科药用植物化学成分的研究现状

龙胆科植物在我国的分布范围很广,且多数为药用植物,其多数种属的药用植物,至今其化学成分尚未被系统研究。综述了目前龙胆科药用植物的化学成分的研究现状及一般提取方法,对近年来发现的环烯醚萜及裂环烯醚萜类化合物进行了总结,为本科药用植物的更深入研究提供了参考。     

真菌类遗传学分析的知识结构教学

本文以认知结构理论为指导,讨论了真菌类遗传分析与高等动植物遗传分析的内在联系,认为利用这种内在联系进行教学可收到好的效果并说明了作者的具体教学过程。 Abstract:In the paper, the relationship between genetic analysis of Fungi and genetic analysis of high animal and plant was discussed.A good results were obtained when we adopted this method in the teaching.     

The effects of glutamine of the maintenance of embryogenic cultures of Cryptomeria japonica

Summary Embryogenic tissues of sugi (Cryptomeria japonica) were induced on a modified Campbell and Durzan (CD) medium containing 1 μM 2,4-dichlorophenoxyacetic acid (2,4-D) and 600 mg l⁻¹ glutamine, and subcultured in the medium of the same composition for over 1 yr. This resulted in a mixed culture of embryogenic and non-embryogenic cells. When embryogenic cells were isolated and cultured independently, their capacity to form embryogenic aggregates was lost. Thus, the non-embryogenic cells present within a mixed culture system were essential to the formation of embryogenic aggregates. When embryogenic tissues were isolated and cultured independently on a high glutamine-containing (2400 mg l⁻¹) medium, dry weights and endogenous levels of glutamine increased, and the tissue could generate a large number of embryogenic aggregates. Amino acid analysis of embryogenic and non-embryogenic cells from the maintenance culture indicated a higher level of glutamine was present in the latter. The high endogenous level of glutamine in the non-embryogenic portion of mixed cell masses may be the supplier of glutamine for maintaining the embryogenic property of the tissues.     

Specificity of action of piperidylcholine derivatives as substrates of cholinesterases of various origin

The review deals with study of enzymologic properties of a novel highly specific acetylcholinesterase substrate, N-(β-acetoxyethyl) piperidinium iodomethylate (“piperidylcholine”), and its 30 derivatives that were tested as effectors of cholinesterases of mammals and various species of Pacific squids. It was proven for the first time that responsible for specificity of action was structure of cyclic ammonium grouping of the alcohol part of molecule of the ester substrate. Analysis of specificity is performed based on enzymatic hydrolysis parameters—activity of catalytic center of cholinesterases and bimolecular constant of the reaction rate that are determined at optimal and low substrate concentrations. Among the specially synthesized group of thioester compounds there is revealed one more highly specific acetylcholinesterase substrate—N-(β-acetoxyethyl) piperidinium.     

Photoregulation of seed germination of wild-type and of an aurea-mutant of tomato

Seed germination of an aurea mutant of tomato ( Lycopersicon esculentum Mill.) is promoted by continuous irradiation with red, far-red or long-wavelength far-red (758 nm) light as well as by cyclic irradiations (5 min red or 5 min far-red/25 min darkness). Far-red light applied immediately after each red does not change the germination behaviour. Seed germination of the isogenic wild-type, cv. UC-105, is promoted by continuous and cyclic red light while it is inhibited by continuous and cyclic far-red light and by continious 758 nm irradiation. Far-red irradiation reverses almost completely the promoting effect of red light. The promoting effect (in the aurea mutant) and the inhibitory effect (in the wild-type) of continuous far-red light do not show photon fluence rate dependency above 20 nmol m⁻² s⁻¹. It is concluded that phytochrome controls tomato seed germination throgh low energy responses in both the wild type and the au mutant. The promoting effect of continuous and cyclic far-red light in the au mutant can be attributed to a greater sensitivity to P_fr.     

医疗机构合理用药评价模型的构建研究

目的 针对医疗机构的合理用药水平进行评价研究。方法 根据医疗机构合理用药的具体要求,构建医疗机构合理用药评价指标体系,采用基于模糊群决策的方法和多指标评价分析法构建医疗机构合理用药评价模型。结果 构建了基于模糊群决策的医疗机构合理用药评价模型,并通过实例分析证明了评价模型的可行性。结论 建立的基于模糊群决策的医疗机构合理用药评价模型能够对医疗机构的合理用药水平进行科学评价,为提高医疗机构合理用药水平奠定基础。