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Polymorphism analysis of Glutathione S-transferase A1 in patients with hematological diseases and its effect on GST enzyme activity
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Glutathione S-transferases (GSTs) are important drug-metabolizing enzymes that catalyze the binding of glutathione (GSH) to electrophilic substances. GST has genetic polymorphism, and the enzyme activity of GST affects the metabolism of certain drugs in vivo. In the present day, we investigated the GST enzyme activity and GSTA1 gene polymorphism in 170 patients with hematological diseases and explored their relationship. The GSTA1 gene polymorphism of the patient was analyzed by PCR- restriction fragment length polymorphism (PCR-RFLP) technique, and the base sequences of the four mutation sites (-631, -567, -69, and -52) in the promoter region were determined by DNA-Sequencer. The patient's GST enzyme activity was calculated by measuring the rate at which it catalyzed the reaction between 1-chloro-2,4-dinitrobenzene (CDNB) and GSH. The average GST enzyme activities of males and females were 5.20±0.13 and 5.17±0.12 nmol/min/mL, respectively, and the difference was not significant (P = 0.91). The frequencies of genotypes GSTA1*A*A (wild genotype), GSTA1*A*B (heterozygous genotype), and GSTA1*B*B (homozygous mutant genotype) were 75.3%, 22.9%, and 1.8%, respectively. Alleles GSTA1*A and *B were distributed at 86.8% and 13.2%, respectively. The genotype frequency distribution between males and females was no significant difference by Pearson’s chi-square test (P = 0.743). The average GST activity of the heterozygous mutant genotype (4.83±0.76 nmol/min/mL) was lower than the wild genotype (5.34±1.26 nmol/min/mL, P = 0.018), and higher than that of the homozygous mutant genotype (3.32±0.07 nmol/min/mL, P = 0.022). These findings might help us improve the individualized treatment of patients with hematological diseases in the future and promote the development of precision medicine for blood diseases. 相似文献
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Sarah Tan Lin Xie Robert Anderson Andrew Hammond Angelina Y. Fong Seok Lim Andrew M. Allen Stephen B. Harrap 《Internal medicine journal》2020,50(1):114-117
Whether part of the blood pressure lowering effects of glyceryl trinitrate (GTN) is the result of centrally mediated reduction in sympathetic activity is debated. In humans, baroreflex activity potentially obscures the central sympatholytic effects of GTN. We examined this in a routine clinical tilt test in a patient with baroreflex failure secondary to previous neck radiotherapy. With reduced baroreflex function we observed an exaggerated fall in blood pressure and reduced sympathetic activity with GTN, supporting a peripheral vasodilation and central sympatholytic effect. 相似文献
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Ji‐Guang Wang Pei‐Li Bu Lu‐Yuan Chen Xin Chen Yuan‐Yuan Chen Wen‐Li Cheng Shao‐Li Chu Zhao‐Qiang Cui Qiu‐Yan Dai Ying‐Qing Feng Xiong‐Jing Jiang Yi‐Nong Jiang Wei‐Hua Li Yan Li Yong Li Jin‐Xiu Lin Jing Liu Jian‐Jun Mu Ying‐Xin Peng Lei Song Ning‐Ling Sun Yan Wang Yang Xi Liang‐Di Xie Hao Xue Jing Yu Wei Yu Yu‐Qing Zhang Zhi‐Ming Zhu 《Journal of clinical hypertension (Greenwich, Conn.)》2020,22(3):378-383
In China, automated blood pressure monitors have been readily available for home use. Home blood pressure monitoring has been indispensable in the management of hypertension. There is therefore a need to establish guidelines for home blood pressure monitoring on the basis of the 2012 consensus document. In this guidelines document, the committee put forward recommendations on the selection and calibration of blood pressure measuring devices, the frequency (times) and duration (days) of blood pressure measurement, and the diagnostic threshold of home blood pressure. 相似文献
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Chaoyi Ye Jin Gong Tingjun Wang Li Luo Guili Lian Huajun Wang Weixiao Chen Liangdi Xie 《Journal of clinical hypertension (Greenwich, Conn.)》2020,22(9):1674
High‐normal albuminuria is related to the morbidity and mortality of cardiovascular disease. Arterial stiffness has been regarded as a predictor of cardiovascular disease. However, the relationship between high‐normal albuminuria and arterial stiffness is uncertain in Chinese population. A total of 1343 Chinese participants (aged 58.9 ± 12.1 years, 63.53% male) were included in this study. High‐normal albuminuria was defined as urinary albumin‐to‐creatinine ratio (UACR) above the median within normal albuminuria. Based on the level of UACR, all participants were divided into low‐normal albuminuria group (UACR < 6.36 mg/g, n = 580), high‐normal albuminuria group (6.36 mg/g ≤ UACR < 30 mg/g, n = 581), microalbuminuria (30 mg/g ≤ UACR < 300 mg/g, n = 162), and macroalbuminuria (UACR ≥ 300 mg/g, n = 20). Arterial stiffness was assessed by measuring carotid‐femoral pulse wave velocity (cfPWV). With the increment of UACR, the level of cfPWV was increased gradually (P < .001). Stepwise multiple regression analysis showed that systolic blood pressure, age, serum creatinine, heart rate, logarithmic (LG)‐transformed UACR, and fasting plasma glucose were independently associated with cfPWV in all subjects (P < .001). LG‐UACR was found to be related to cfPWV in high‐normal albuminuria and macroalbuminuria subjects. After further stratification in the high‐normal albuminuria subjects, their relation remained in male, elderly over 65 years old, or normotensives. In summary, UACR is associated with arterial stiffness in subjects with proteinuria excretion in high normal level. High‐normal albuminuria might be an early indicator of arterial stiffness, especially in male, elderly, or normotensives in Chinese population. Furthermore, age and blood pressure are still observed to be the most important risk factor of arterial stiffness. 相似文献
1000.
目的探讨Isthmin(ISM)对肺纤维模型小鼠肺部胶原沉积、血管新生的影响,为肺纤维化的防治提供理论依据。方法将昆明小鼠随机分成:对照组、模型组、ISM组3组,每组16只。博来霉素(BLM)气管内滴人制作小鼠肺纤维化模型,对照组(气管内注射0.9%NS+尾静脉注入0.9%NS)、模型组(气管内注射BLM+尾静脉注入0.9%NS)、ISM组(气管内注射BLM+尾静脉注入Isthmin蛋白)。分别于第7天、14天、21天、28天取实验小鼠肺组织,病理切片苏木精-伊红染色(HE)染色观察肺结构变化,Masson染色了解肺部胶原沉积情况,CD31免疫组化观察对血管内皮细胞数目的影响。结果给予ISM蛋白可减轻小鼠肺结构破坏,减少肺部胶原沉积,血管内皮细胞数目增加。肺组织胶原纤维Masson染色经平均光密度比较,模型组与对照组第7、14、21和28天差异具有统计学意义(P〈0.01);Isthmin组与模型组比较,第21天和28天差异具有统计学意义(P〈0.01);肺组织CD31蛋白平均光密度比较,模型组与对照组第14天、21天和28天差异显著(P〈0.05)、第7天差异具有统计学意义(P〈0.01),Isthmin组与模型组比较,第21天和28天差异具有统计学意义(P〈0.05)。结论ISM蛋白可减轻肺纤维化程度,但不是通过抑制血管形成实现的。 相似文献