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目的研究地龙成分EFE及含药血清对体外培养的人正常肾小球系膜细胞(HMC)增殖的影响,并从血清药物化学角度探讨其药理药效和防治糖尿病肾病的可能作用机制。方法将常规培养的HMC分为地龙成分EFE直接给药和含药血清给药两种方式,分别设空白对照组、低、中、高剂量组和福辛普利组,各组分别于相应处理后24 h、48 h和72 h采用4-甲偶氮唑蓝(MTT)法检测细胞增殖。结果直接给药组中各药物组与空白对照组(直)比较,均不同程度的抑制了正常HMC的增殖,中剂量药物组(直)对HMC细胞的增殖抑制作用最为显著;含药血清组中各药物组与空白对照组(血)比较,也不同程度的抑制了正常HMC的增殖,高剂量药物组(血)对HMC细胞的增殖抑制作用最为显著,并且高剂量药物组(血)对细胞增殖的抑制率高于中剂量药物组(直)。结论地龙成分能够抑制HMC的增殖,其含药血清对正常HMC增殖的抑制作用优于地龙成分直接给药。  相似文献   
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地龙耐热蛋白降压作用的研究   总被引:1,自引:0,他引:1  
目的:研究地龙耐热蛋白(LHP)对正常大鼠及自发性高血压大鼠(SHR)血压的影响。方法:正常大鼠分别静脉给予LHP0.1、0.2g/kg,SHP分别腹腔给予生理盐水或LHP0.4、0.8g/kg,采用颈动脉插管法检测正常大鼠的血压,无创尾套法测定SHR的血压。结果:单次静脉给药,0.2g/kgLHP能显著降低正常大鼠的血压,起效快、作用强、持续时间短;连续28d腹腔注射给药,0.4g/kgLHP能显著降低SHR的血压。结论:LHP对正常大鼠和SHR均有显著降压作用,该降压作用可能与抑制血管紧张素转化酶有关。  相似文献   
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The freeze-dried powder ofLumbricus rubellus earthworm was administered orally to rats and its fibrinolytic and antithrombotic effects were investigated. The fibrinolytic activity of plasma was determined by measuring the plasmin activity of the euglobulin fraction and was increased to two-folds of the control at a dose of 0.5g/kg/day and five times with 1 g/kg/day after 4-day administration. The antithrombotic effect was studied in an arterio-venous shunt model of rats. The thrombus weight decreased significantly from 43.2 mg to 32.4 mg at a dose of 0.5g/kg/day after 8-day treatment. The level of fibrinogen/fibrin degradation product (FDP) in serum was elevated in a dose-dependent manner during the treatment period. On the 8th day after administration, the FDP value was increased to 7.7 μg/ml compared with the control value of 3.3 μg/ml. These results support that earthworm powder is valuable for the prevention and/or treatment of thrombotic conditions.  相似文献   
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Lumbricus rubellus is a cosmopolitan earthworm devoid of riboflavin-storing eleocytes; its immune competent coelomocytes are predominantly amoebocytes. Our aim was to determine whether amoebocyte cytometrics in L. rubellus are robust biomarkers for innate immunological responses to environmental pollutants. Investigations were conducted on populations inhabiting three unpolluted and five metalliferous (mainly Pb+Zn+Cd) habitats in the UK and Poland. Inter-population differences in worm mass and amoebocyte numbers did not consistently reflect soil or tissue metal concentrations. Flow cytometry indicated that autofluorescence of the amoebocytes differs between cells from the unpolluted and metal-polluted worms, and pinocytosis of neutral red by amoebocytes was lower (especially at 15 versus 60 min incubation) in worms from the polluted Poland site compared with the reference population. To conclude, amoebocyte cytometrics and functionality are potentially useful for environmental diagnostics; deployment is contingent on better understanding potential confounders.  相似文献   
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Carbacholine depolarizes Lumbricus terrestris myocyte membrane. Addition of verapamil, tetrodotoxin, removal of K+, Cl-, and Ca2+, and replacement of Ca2+ with Mn2+ in the bathing solution did not prevent the carbacholine-induced decrease in resting potential, but in a sodium-free medium carbacholine was ineffective. It was hypothesized that depolarization of the sarcolemma resulting from activation of cholinomimetic-sensitive channel-receptor complex of the Lumbricus terrestris somatic muscle cells is primarily determined by sodium permeability of the membrane.  相似文献   
7.
The epidermis of the earthworm Lumbricus terrestris is a multifunctional tissue. It is composed of supporting, mucous, neuroendocrine-like, sensory and basal cells. NO is considered to be a molecule that regulates numerous functional activities (also in non-neuronal cells) in vertebrates. In the earthworm epidermis, we found neuronal NO synthase immunopositivity in orthochromatic and metachromatic mucous cells, neuroendocrine-like cells and in epidermal and subepidermal nerve fibers and striated muscle fibers. It is suggested that NO has a multitude of biological actions, affecting functional activities of the epidermis such as tissue homeostasis, control of secretion, proliferation, respiration, defense, water-salt balance, as well as regulation of tonus in vascular and striated muscles.  相似文献   
8.
Miniature stimulating postsynaptic currents of Lumbricus terrestris somatic muscle cells were recorded. Atropine, d-tubocurarin, α-bungarotoxin, carbacholine, and proserin did not modify the amplitude and temporal parameters of miniature stimulatory postsynaptic currents, while carbacholine and nicotine depolarized the muscle membrane. Presumably, Lumbricus terrestris muscle cells contain acetylcholine-sensitive channel-receptor complexes not belonging to classical nicotinic or muscarinic acetylcholine receptors.__________Translated from Byulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 139, No. 3, pp. 342–345, March, 2005  相似文献   
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目的观察腹腔注射地龙注射液对哮喘大鼠肺通气功能和气道阻力的影响。方法应用随机分组的方法将大鼠分为实验4周、8周和12周组,每组又分别分为哮喘组、地塞米松干预组、地龙干预组和对照组,每个小组8只动物。用卵蛋白(OVA)腹腔注射致敏加雾化吸入诱喘的方法制成哮喘模型,地龙和地塞米松干预组诱喘前分别给予地龙注射液腹腔注射和地塞米松雾化吸入,应用Maclab数据系统记录分析大鼠肺通气功能和气道阻力。结果实验4周组,各组间肺顺应性差异无统计学意义,哮喘组与其余3组比较,气道阻力明显增高(P<0.01)、每分通气量降低(P<0.01)、呼吸频率增快(P<0.01);实验8周和12周,哮喘组气道阻力明显增加,每分通气量降低,肺顺应性下降,呼吸频率增快(P<0.01或0.05),而地龙组和地塞米松组与对照组比较,气道阻力增高(P<0.05)、呼吸频率增快(P<0.05)、每分通气量降低(P<0.01)、肺顺应性下降(P<0.05);地龙组与地塞米松组间各项肺功能指标差异均无统计学意义。结论地龙注射液可缓解哮喘大鼠支气管痉挛,降低气道阻力,改善肺功能。  相似文献   
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