葛根素治疗溶栓后再灌注微循环障碍的实验性研究

目的 观察葛根素对溶栓后再灌注微循环的治疗作用.方法 中国大耳白兔12只,体重2.5～3.0Kg,随机分为两组即生理盐水对照组(A组)和葛根素治疗组(B组),每组6只.电刺激法在兔右股动脉造成血栓,尿激酶(60000u·kg-1)+普通肝素(250u·kg-1)溶栓后对照组和治疗组立即分别给予生理盐水(5ml/kg)和葛根素(5ml/kg)静脉推注.通过对不同时间静脉血中TXB2和6-Keto-PGF1a含量及病理两方面观察来评价溶栓后立即给予葛根素对微循环再灌注的影响.结果 对照组和治疗组再通后血栓素B2(TXB2)和6-酮-前列腺F1a(6-Keto-PGF1a)值均升高,但治疗组6-Keto-PGF1a升高更显著,而对照组TXB2升高明显;对照组观察到微血栓形成和明显组织损伤,治疗组未见微血栓形成,组织损伤减轻.结论 溶栓后立即给予葛根素可改善溶栓后微循环再灌注.     

葛根素治疗溶栓后再灌注微循环障碍的实验性研究

目的 观察葛根素对溶栓后再灌注微循环的治疗作用.方法 中国大耳白兔12只,体重2.5～3.0Kg,随机分为两组即生理盐水对照组(A组)和葛根素治疗组(B组),每组6只.电刺激法在兔右股动脉造成血栓,尿激酶(60000u·kg-1)+普通肝素(250u·kg-1)溶栓后对照组和治疗组立即分别给予生理盐水(5ml/kg)和葛根素(5ml/kg)静脉推注.通过对不同时间静脉血中TXB2和6-Keto-PGF1a含量及病理两方面观察来评价溶栓后立即给予葛根素对微循环再灌注的影响.结果 对照组和治疗组再通后血栓素B2(TXB2)和6-酮-前列腺F1a(6-Keto-PGF1a)值均升高,但治疗组6-Keto-PGF1a升高更显著,而对照组TXB2升高明显;对照组观察到微血栓形成和明显组织损伤,治疗组未见微血栓形成,组织损伤减轻.结论 溶栓后立即给予葛根素可改善溶栓后微循环再灌注.     

川芎生物碱对局灶性脑缺血-再灌注大鼠血清中NO,NOS的影响

目的研究川芎生物碱对局灶性脑缺血-再灌注大鼠血清中的一氧化氮(NO)、一氧化氮合酶(NOS)含量的影响.方法腹腔注射(ip)川芎生物碱50,100,200 mg·kg-1和生理盐水1周后将其制成局灶性脑缺血-再灌注大鼠模型并检测血清中的一氧化氮(NO)、一氧化氮合酶(NOS)含量,并与假手术组对照比较.结果缺血-再灌注组与假手术组相比,血清中的NO含量也显著升高(P《0.01);CHX50 mg·kg-1 ,CHX100 mg·kg-1,CHX200 mg·kg-1各组与缺血-再灌注组相比,血清中NOS活性(P《0.01)和NO含量(P《0.01)均显著降低.结论川芎生物碱能够降低血清中NO的含量、NOS的活性,减少大鼠神经功能的损害,减少脑组织损害.     

黄芪对急性心肌梗塞溶栓后再灌注损伤中心肌顿抑功能恢复的促进作用的研究

目的探讨黄芪对急性心肌梗塞（AMI）溶栓后再灌注损伤中顿抑心肌功能恢复的促进作用。方法将110例溶栓后冠脉再通的AMI患者随机分为治疗组（56例）和对照组（54例）。对照组采用常规尿激酶溶栓治疗和肝素抗凝，而治疗组在对照组的治疗基础上加用黄芪针每次30ml静滴，1次／d，连用3周。结果再灌注后心肌均表现不同程度顿抑现象，两组顿抑程度并无显著差异（P〉0．1），但随着时间推移追踪观察发现治疗组顿抑心肌功能恢复时间明显短于对照组（P〈0．01）。结论黄芪对溶栓后再灌注心肌有较强的保护作用，可提早恢复顿抑心肌的功能。     

高压氧对慢性充血性心力衰竭患者血循环内皮细胞及脑钠素的影响

目的探讨充血性慢性心力衰竭(CHF)时血循环内皮细胞记数(CEC)、血浆脑钠素(BNP)、血浆内皮素(ET-1)及6酮前列腺素F1a(6-Keto-PGF1a)水平的变化及高压氧(HBO)治疗的干预效应.方法 60例CHF患者随机分为BBO治疗组30例,对照组30例,HBO组治疗压力0.2 MPa,1次/d,每周6次,共治疗4周,并检测用药前后自身外周血循环CEC数量、血浆ET-1,BNP及6-Keto-PGF1a的含量,30例CHF患者未行HBO治疗为对照组.结果高压氧治疗可使CEC数量、血浆ET-1及BNP水平明显降低及6-Keto-PGF1含量明显增加(P<0.01).结论慢性心力衰竭时存在血管内皮细胞受损,而高压氧治疗具有保护血管内皮细胞及改善心功能的作用.     

链激酶静脉溶栓治疗急性心肌梗塞30例

目的:探讨重组链激酶(rSK)静脉溶栓治疗急性心肌梗塞(AMI)的疗效。方法:对60例发病12h以内患者随机分为两组:治疗组30例,在常规治疗的基础上,给rSK150万u+5％G S100ml60min静脉滴完;对照组30例,给常规治疗。结果:治疗组血管再通率83.3％,对照组无1例出现血管再通。两组差异有显著性(P<0.005)。治疗组胸痛消失出现在治疗后2±1.2h,CK-MB酶峰出现在发病后12±2h,与对照组比较差异均有显著性(P<0.001)。治疗组并发心源性休克和心力衰竭少于对照组(P<0.05和P<0.01)。治疗组的病死率3.3％,明显低于对照组23.3％。治疗组出现镜下血尿5例,无严重出血者,无一例发生过敏反应,有2例发生低血压。结论:国产重组链激酶为治疗心肌梗塞有效安全的溶栓药物。     

氧自由基和牛磺酸在家兔休克再灌注损伤中的作用

探讨氧自由基 (OFR)在失血性休克再灌注损伤中的作用及牛磺酸的保护效应。健康家兔 2 4只随机分为 3组(n =8) :对照组、单纯休克组、牛磺酸治疗组 ;采用失血性休克再灌注损伤模型。连续观察休克前 ,休克 1.5h ,再灌注 1h、2h、3h时血浆超氧化物歧化酶 (SOD)活性、丙二醛 (MDA)含量、乳酸脱氢酶 (LDH)活性的动态变化 ;并测定再灌注 3h时心、肺组织MDA含量和SOD活性。结果显示 ,1)单纯休克组再灌注各时限MDA含量、LDH活性显著升高 ;SOD活性显著下降。 2 )再灌注 3h时心、肺组织MDA含量显著升高 ;SOD活性显著下降。 3)牛磺酸 (40mg·kg-1,iv)可减轻再灌注各时限上述指标的变化 (均P <0 .0 1)。提示OFR介导了休克再灌注损伤 ,牛磺酸对休克再灌注损伤的保护作用可能与减少OFR的生成和促进自由基的清除有关。     

人硫氧还蛋白对脑缺血作用的CT灌注与SOD相关性的实验研究

目的研究人硫氧还蛋白(hTRX)对局灶性兔脑缺血/再灌注损伤后脑组织的保护作用,并探讨其清除氧自由基的生物学活性.方法采用线栓法制成一侧兔脑缺血/再灌注模型(栓塞6 h,再灌注18 h),将25只雄性新西兰白兔随机分成假手术组(Sham组,5只)、缺血/再灌注组(I/R组,10只)和缺血/再灌注 hTRX治疗组(I/R hTRX组,10只),I/R hTRX组给予hTRX(0.75 mg/kg体质量),Sham组、I/R组以等容积的生理盐水取代hTRX;分别于梗死后6 h及再灌注后18 h做CT灌注图像,观察脑梗死面积,计算出其所占同侧大脑半球面积的百分比(HLA%);检测脑组织匀浆中SOD,MDA含量.结果脑缺血/再灌注后,脑梗死范围显著,脑组织匀浆中SOD明显下降,MDA明显升高(与假手术组比较,P<0.01);而应用hTRX能显著减小脑梗死面积,降低MDA及升高SOD含量(与B组比较,P<0.01).结论重组hTRX对脑缺血/再灌注损伤有显著的治疗作用.     

葛根素对肝脏缺血再灌注损伤后细胞凋亡的影响

探讨了葛根素对大鼠肝脏缺血再灌注损伤后细胞凋亡的影响.对雄性SD大鼠,随机分为假手术组、缺血再灌注组(HIR)和HIR-葛根素预处理组.肝脏缺血再灌注后,通过Western blot方法,分析大鼠肝脏组织中P21蛋白表达的变化,同时利用Annexin V/PI双染色流式细胞仪,检测肝脏缺血再灌注损伤后肝细胞凋亡率的变化.结果与假手术组相比,大鼠肝脏缺血再灌注损伤后,肝脏组织中P21蛋白表达水平显著升高,肝细胞凋亡率增加;而经过葛根素预处理后,模型组动物肝脏组织中P21蛋白表达水平显著降低,同时肝细胞凋亡率下降.葛根素可能通过调节P21蛋白的表达,抑制肝细胞的凋亡,发挥对肝脏缺血再灌注损伤的保护作用.     

葛根素治疗不稳定性心绞痛71例临床观察

目的探讨在常规治疗基础上应用葛根素注射液治疗不稳定性心绞痛(UA)的疗效。方法对于入院确诊为不稳定性心绞痛的患者,随机分为两组:对照组为常规抗凝组,低分子肝素5000u皮下注射,1次/12h,共5d,阿斯匹林肠溶片0.3g,1次/d,3d后改为0.1g,1次/d,长期服用;治疗组为葛根素组,葛根素300mg静脉滴注,1次/d,其余治疗同对照组。结果治疗组控制症状及改善异常心电图方面均优于对照组,并使C-反应蛋白(CRP)浓度更快下降,与对照组相比,差异有显著性(P<0.05)。结论在抗凝及抗血小板基础上加用葛根素,治疗UA疗效优于常规抗凝治疗。     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

Lower Paleozoic oil relationships within Williston Basin, Canada

The Williston Basin is a significant petroleum province, containing oil production zones that include the Middle Cambrian to Lower Ordovician, Upper Ordovician, Middle Devonian, Upper Devonian and Mississippian and within the Jurassic and Cretaceous. The oils of the Williston Basin exhibit a wide range of geochemical characteristics defined as "oil families", although the geochemical signature of the Cambrian Deadwood Formation and Lower Ordovician Winnipeg reservoired oils does not match any "oil family". Despite their close stratigraphic proximity, it is evident that the oils of the Lower Palaeozoic within the Williston Basin are distinct. This suggests the presence of a new "oil family" within the Williston Basin. Diagnostic geochemical signatures occur in the gasoline range chromatograms, within saturate fraction gas chromatograms and biomarker fingerprints. However, some of the established criteria and cross-plots that are currently used to segregate oils into distinct genetic families within the basin do not always meet with success, particularly when applied to the Lower Palaeozoic oils of the Deadwood and Winnipeg Formation.     

An Analysis of Catherine＇s Character——Wuthering Heights

Wuthering Heights, Emily Bronte＇s only novel, was published in December of 1847 under the pseudonym Ellis Bell. The book did not gain immediate success, but it is now thought one of the finest novels in the English language. Catherine is the key character of this masterpiece, because everybody and everything center on her though she had a short life. We can understand this masterpiece better if we know Catherine well.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

Design and analysis of generic LBS application developing platform

Location based services is promising due to its novel working style and contents.A software platform is proposed to provide application programs of typical location based services and support new applications developing efficiently. The analysis shows that this scheme is easy implemented, low cost and adapt to all kinds of mobile nework system.     

橡胶颗粒沥青混合料低温抗裂性试验研究

以AC-13级配为基础,将橡胶颗粒代替部分集料掺入混合料中,以低温弯曲试验为评价方法对不同橡胶颗粒掺量下沥青混合料的低温抗裂性进行研究,并引入应变能密度值对混合料的低温抗裂性进行综合评价.试验结果表明:橡胶颗粒沥青混合料试件的破坏微应变均超过2 300,满足冬寒区的技术指标;无论是否掺加橡胶颗粒,随着温度的下降,沥青混合料破坏时的最大弯拉强度增大,弯拉应变降低,劲度模量增大;弯曲应变能密度在胶粒掺量为1%左右时具有较大的弯曲应变能密度值,此时橡胶颗粒沥青混合料具有较好的低温抗裂性.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

Quantitative trait loci （QTLs） for quality traits related to protein and starch in wheat

Quality traits in wheat （Triticum aestirum L.） were studied by quantitative trait locus （QTL） analysis in a recombinant inbred line （RIL） population, a set of 131 lines derived from Chuan 35050 × Shannong 483 cross （ChSh）. Grains from RILs were assayed for 21 quality traits related to protein and starch. A total of 35 putative QTLs for 19 traits with a single QTL explaining 7.99-40.52% of phenotypic variations were detected on 10 chromosomes, 1D, 2A, 2D, 3B, 3D, 5A, 6A, 6B, 6D, and 7B. The additive effects of 30 QTLs were positive, contributed by Chuan 35050, the remaining 5 QTLs were negative with the additive effect contributed by Shannong 483. For protein traits, 15 QTLs were obtained and most of them were located on chromosomes 1 D, 3B and 6D, while 20 QTLs for starch traits were detected and most of them were located on chromosomes 3D, 6B and 7B. Only 7 QTLs for protein and starch traits were co-located in three regions on chromosomes 1D, 2A and 2D. These protein and starch trait QTLs showed a distinct distribution pattern in certain regions and chromosomes. Twenty-two QTLs were clustered in 6 regions of 5 chromosomes. Two QTL clusters for protein traits were located on chromosomes 1D and 3B, respectively, three clusters for starch traits on chromosomes 3D, 6B and 7B, and one cluster including protein and starch traits on chromosome 1D.