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 62 毫秒
1.
用图论的方法研究了饱和链烷烃的临界体积与分子结构间的关系,发现临界体积随结构的变化与Wiener指数和极性数密切相关,从而建立了它们间的关系式。据此能由饱和链烷烃的分子结构预测其临界体积。对C_4~C_942个异构烷烃的检验结果表明,计算值与实验值的平均相对偏差为1.76%,可与Perry和White提出的方法相比拟。  相似文献   

2.
遗传学相关疾病患者的外周血染色体核型分析   总被引:2,自引:0,他引:2  
疑为与遗传学疾病相关的1441例各类患者的外周血进行染色体术时分,发现异常核型283例,其中,原发闭经1例,核型为46,XX,1q^11-12+;先天愚型中,1例核型为46,XX,inv(10)(q^21)P^tex,21q^+,属罕见核型。11例男性性反转综合征患者,其核虽无Y染色体,但性生活均正常,此点应直民临床注意。  相似文献   

3.
目的:试建立线性代数模型,以拟合封闭近交群体内等位基因纯化的过程。方法;通过考察与性染色体X连锁的等位基因频率的变化规律,获得邻近两代(第n-1代和第n代)自交对基因型概率之间的为X^(n)=MX^(n-1)。经矩阵相似变换,求得系数矩阵M的特征值、特征向量和可逆矩阵P。结果:第n代自交对各种基因型的概率与起始状态基因型的概率之间的。为X^(n)=P.D^n.P^-1.X(0),当n→∞时,杂合自  相似文献   

4.
冠心病患者血清OX—LDL和Lp(a)的检测   总被引:1,自引:0,他引:1  
测定15例急性心肌梗塞,25例不稳定性心绞痛及24例非冠心病患者血清中的OX-LDL,Lp(a)并与25例正常人作比较,其结果显示,冠心病患者血清OX-LDL均值〉500μg.L^-1,Lp(a)均值〉500mg.L^-1,而非冠心病人及正常人的OX-LDL均值〈350μg.L^-1,Lp(a)〈250mg.L^-1。2组间差异非常显著(P〈0.01)。相关分析显示:OX-LDL,Lp(a)与血清  相似文献   

5.
^3H—TdRβ线与^60Coγ线引起的人淋巴细胞微核效应   总被引:1,自引:0,他引:1  
采用人外周血淋巴细胞体外培养胞浆阻滞微核测试法,观察用^3H-TdRβ线和^60Coγ线照射引起的剂量-效应关系,并计算了^3H-TdRβ线的相对生物效应值。^3H-TdRβ线内照射和^60Coγ线外照射的剂量效应关系均符合Y=A+BX+CX^2线性-平方数学模式,淋巴细胞微核频率随β线和γ线剂量的增加而增加。^3H-TdRβ线的RBE均值为1.19,表明其β线产生的生物效应是γ线的1.19倍。  相似文献   

6.
研究了聚芳醚酮系列在1,2-二氯乙烷中的吸附,及溶剂与温度诱导结晶行为。得到60℃时的最大吸附量C∞及假扩散系数D为:PEEK,C∞=46%,D=3.10×10^-12m^2·s^-1;PEEKK,C∞=50%,D=6.57×10^-12m^2·s^-1;PEKK,C∞=55%,D=9.41×10^-12m^2·s^-1。实验表明,吸附及脱附行为均与分子链刚性或羰基含量有关,膜的分子链受溶剂作用而  相似文献   

7.
为研究载脂蛋白B(apoB)基因限制性片段长度多态性与动脉粥样硬化性脑梗死(ACI)的关系,采用聚合酶链反应(PCR)技术检测阵人85例ACI和56例正常人(NC)的apoB基因的XbaⅠ位点多态性。结果显示:中国人XbaⅠ位点基因频率与国外种族有差异。本研究X^+等位位基因频率高于日本人、新加坡人,低于印度人、南亚人及欧洲人。NC组X^-X^+基因型血浆总胆固醇(TC)水平明显高于X^-X^-基  相似文献   

8.
目的:探讨动脉粥样硬化性脑梗死(ACI)与载脂蛋白B基因XbaⅠ酶切多态性的关系。方法:以apoB cDNA片段(LB1.5)为探针,利用Southern印迹杂交技术,检测了56名汉族ACI患者和61名正常对照者的apoB基因XbaⅠ限制性片段长度多态性(RFLP)等位基因频率。结果:发现8.6kb(X^-)和5.0kb(X^+)两条杂交片段,X^+等位基因频率在ACI(0.143)和对照者(0.  相似文献   

9.
采用含活性基团的聚二甲基硅氧烷与丙烯酸酯进行自由基共聚合,合成了自聚二甲基硅氧烷侧链的丙烯酸酯共聚物。采用IR,^1H-NMR,GPC等分析方法对共聚物结构和组成进行了表征。通过接触角和X-射线光电子能谱对共聚物的表面性能和表面组成进行了研究,并通过粘接性能和破坏面形貌对共聚物与金属铝材和加成型硅橡胶的粘接性进行了探讨。  相似文献   

10.
采用自行改良的肺血管通透性实验方法建立了黄嘌呤和黄嘌呤氧化酶(X-XO)所致肺血和通透性损伤大鼠动物模型,并研究了血管活性肠肽(VIP)对其肺血管通透性损伤的作用。在含1mmol/L黄嘌呤的生理缓冲液中加入0.05U/ml黄嘌呤氧化酶进行闭合肺动脉重复灌注30min后测定^125I-白蛋白渗漏指数(^125I-ALI)等参数。结果显示,气道压力尚无显著增加的情况下^125I-ALI已有显著增高,3  相似文献   

11.
FOR anesthesiologis s ,treatingpostoperativepainhas alwaysbeen a problem.Althoughopioidshave been provedtobe effective,theirsideeffectscouldnotbeignored.With thedevelopmentofscienceand pharmacology,many drugs with aspectsof satisfactoryanalgesicefficacyand couldbe welltoleratedby patientshave been developed.And lornoxicamisone of them, which isa non-steroidalanti-inflammatorydrug (NSAID ), with analgesic, anti-infl-ammatory,andantipyreticproperties.Itseliminationhalf-time(3 to 5 hours) isle…  相似文献   

12.
Dr.Zhang Ren,the chief physician,is the chairman of Shanghai Acupuncture and Moxibustion Association.Having been engaged in medicine for about 40 years,he is experienced in treating various intractable diseases.In his long years of clinical practice,he advocates taking the TCM differentiation as the basis to seek for the acupuncture method for treatment of modern intractable diseases.The author of this essay had the fortune to follow Dr.Zhang in study.The following is a summary of Dr.Zhang's experience in the acupuncture treatment for different intractable diseases with the same therapeutic principle.  相似文献   

13.
In treating chronic nephropathy,Luo Lingjie,a chief physician,pays attention to regulating the balance between yin and yang,treating infection if present,and removing pathogenic factors.He prescribes gentle drugs and uses carefully strongly warming-tonifying ones,emphasizes the importance of persuading the patient to persist in treatment with medication and nurse one's health for recuperation,and is good at combined use of TCM and western medicine therapy and brings the merits of various therapies into full play,with obvious theraoeutic effects.  相似文献   

14.
Objective: To observe the therapeutic effects in acupunture treatment of primary dysmenorrhea combined with spinal Tui Na, and study its mechanism. Methods: Thirty cases of the treatment group were treated by acupuncture combined with spinal Tui Na, and thirty cases in the control group were treated by routine acupuncture. Results: The total effective rate was 93.3% in the treatment group, and 73.3% in the control group, with a significant difference between the two groups (P<0.05). Conclusions: Acupuncture combined with spinal Tui Na has good prospects for treatment of primary dysmenorrhea.  相似文献   

15.
16.
目的 探讨猪肺磷脂注射液联合经鼻持续气道正压通气(NCPAP)对呼吸衰竭早产儿的临床疗效及肌酸激酶同工酶活性(CK-MB)的影响.方法 选取呼吸衰竭早产儿80例,分为观察组和对照组各40例.对照组采用NCPAP给氧治疗,观察组给予NCPAP给氧联合猪肺磷脂气管内给药.观察两组患儿治疗前及治疗12h、24 h后PaO2、PaCO2、血氧饱和度(SaO2)、pH的变化情况,检测治疗前及治疗5d后血清CK-MB水平;评估两组患儿的临床治疗效果.结果 两组患儿PaO2、PaCO2、SaO2、pH比较,差异均有统计学意义(P<0.05),其中观察组治疗后的PaO2、SaO2、pH均高于对照组,PaCO2则低于对照组.两组的PaO2、SaO2、pH均随观察时间延长而升高(P<0.05),PaCO2均随观察时间的延长而降低(P<0.05).观察组治疗有效率为87.5%,显著高于对照组的70.0% (P <0.05).治疗5d后两组患儿血清CK-MB水平均较前降低(P<0.05),且观察组明显低于对照组(P<0.05).结论 猪肺磷脂注射液气管内给药联合NCPAP可以显著降低呼吸衰竭早产儿CK-MB的含量,提高治疗有效率,起到很好的呼吸循环支持作用.  相似文献   

17.
Evidence obtained from randomized controlled trials (RCTs) has been generally accepted as the gold standard in the evaluation of clinical effectiveness. Readers need to understand the trial design, implementation, results, analysis and interpretation, so as to fully Jnderstand the results of RCTs. Thus, the investigators of RCTs have to report these items in a complete, accurate and clear manner. Since 1998, we have conducted several evaluations on the reporting quality of RCTs published in Chinese journals on traditional Chinese medicine (TCM) and results have shown that there is an urgent need for higher quality RCTs on TCM.  相似文献   

18.
Ankylosing spondylitis is a chronic and progressive disorder with inflammation mainly involving the central axis joints. It mainly affects the cervical spine and the lumbosacral area, with the pathogenesis closely related to the kidney and the Governor Vessel (GV). TCM holds that the syndrome is deficiency in origin and excess in superficiality, which is due to insufficiency of the kidney, deficiency of GV, and blocking of the channels with the invasion of exogenous evil, leading to poor circulation of qi and blood and malnutrition of the bones, muscles and joints. The TCM method of tonifying the kidney and strengthening GV to regulate circulation of qi and blood and check the arthralgia pain should be adopted, with the Kidney-Tonifying and GV Strengthening Decoction (益肾强督汤) prescribed.  相似文献   

19.
20.
CHEMOTHERAPY playsa greatrolein the treat- ment of malignanttumors,especiallyingynecolo- gicalones.But inanticancerchemotherapy,leuko-cytopeniaisfrequentlytheprimarydose-limitingsideeffect factor.Moreover,cancersarefrequentlychemoresistantbe-causeof overexpressionof P-glycoprotein(P-gp), which isencodedby multidrugresistancegene (MDR1 ) and detectableinup to50% ofhuman cancersand renderscellsresistancetoanticancerdrugs.The safetyand potentialtherapeuticbenefitof mdr1 gene transferredto h…  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