全文获取类型
收费全文 | 248篇 |
免费 | 18篇 |
国内免费 | 14篇 |
专业分类
妇产科学 | 1篇 |
基础医学 | 8篇 |
临床医学 | 7篇 |
内科学 | 9篇 |
皮肤病学 | 48篇 |
神经病学 | 2篇 |
特种医学 | 14篇 |
外科学 | 3篇 |
综合类 | 68篇 |
预防医学 | 13篇 |
眼科学 | 1篇 |
药学 | 44篇 |
中国医学 | 60篇 |
肿瘤学 | 2篇 |
出版年
2023年 | 1篇 |
2022年 | 4篇 |
2021年 | 6篇 |
2020年 | 6篇 |
2019年 | 3篇 |
2018年 | 6篇 |
2017年 | 5篇 |
2016年 | 9篇 |
2015年 | 8篇 |
2014年 | 22篇 |
2013年 | 16篇 |
2012年 | 26篇 |
2011年 | 18篇 |
2010年 | 20篇 |
2009年 | 17篇 |
2008年 | 12篇 |
2007年 | 8篇 |
2006年 | 22篇 |
2005年 | 13篇 |
2004年 | 13篇 |
2003年 | 5篇 |
2002年 | 8篇 |
2001年 | 1篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1998年 | 2篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 5篇 |
1994年 | 3篇 |
1993年 | 3篇 |
1992年 | 1篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1985年 | 1篇 |
排序方式: 共有280条查询结果,搜索用时 31 毫秒
1.
Josef A. Brinckmann Anthony B. Cunningham David E. V. Harter 《World Journal of Traditional Chinese Medicine》2021,(3)
Occurring in China, DPR Korea, Japan, and Russian Federation and classified in the Red List of Chinese Flora as a vulnerable species, Rhodiola sachalinensis Boriss. is used increasingly in cosmetics, dietary supplements, and Traditional Chinese Medicines (TCMs). The aim of this study was to evaluate the (i) conservation status, harvesting and trade levels of R. sachalinensis,(ii) current state of experimental and commercial farming, and (iii) evidence of substitution or interchangeable use of R. sachalinensis with other Rhodiola species. We assessed data from multiple disciplines and languages including studies on R. sachalinensis biology and ecology, information on impacts of wild harvest, management measures, and current levels of cultivation. Our assessment shows that while R. sachalinensis is increasingly produced by cultivation, wild populations are decreasing and face multiple threats. These include (a) habitat loss including due to oil and gas infrastructure development on Sakhalin island,(b) climate change impacts on alpine ecosystems, and (c) overexploitation of wild plants to satisfy the growing commercial demand. Assessments of the conservation status of R. sachalinensis should commence in each Range State, as well as resource assessments and monitoring of harvesting and trade of wild R. sachalinensis. Even with increased reliance on cultivation, biodiversity conservation, and genetic diversity in wild populations are relevant to future use of this species. 相似文献
2.
3.
A new type of coronavirus family (SARS‐CoV‐2), which can be found in humans and animals, with many varieties and clinical symptoms, was first seen in Wuhan, China in late 2019, under the name novel Coronavirus Disease 2019 (COVID‐19). In the literature, cutaneous symptoms related to the disease are generally emphasized. However, it is not yet known whether this new SARS‐CoV‐2 virus, which has entered our lives, plays a role in the etiopathogenesis of dermatological diseases. The patients who were admitted to the dermatology outpatient clinic between 1 April and 15 May 2019, and on 1 April and 15 May 2020 were retrospectively analyzed by searching the hospital automation system and patient files. The reason for the same months to be included in the study was to exclude seasonal effects on the diseases. After pandemic, the number of patients with Pityriasis rosea and Kawasaki disease increased significantly in patients who applied to the dermatology outpatient clinic. Our study is the first study showing Pityriasis rosea increase during the pandemic period. We think that this increase is related to HHV‐6 reactivation. Herein, we wanted to draw attention to two diseases in which Human Herpes 6 (HHV‐6) was accused in etiopathogenesis: Kawasaki disease and Pityriasis rosea. 相似文献
4.
目的探讨黄芩苷胶囊对急性高原病(acute mountain sickness,AMS)的预防作用。方法采用随机对照的研究方法,80名急进高原健康男性青年随机分为3组,黄芩苷组(n=32)、红景天组(n=24)和安慰剂组(n=24)。3组在进入高原前2 d、进入高原后连续3 d分别服用黄芩苷胶囊(0.5 g,2次/d)、红景天胶囊(0.76 g,2次/d)和安慰剂(2粒,2次/d)。检测急进高原前(海拔397 m)和急进高原后(3658 m)受试者氧饱和度、心率、收缩压、舒张压,彩色多普勒超声测量肺动脉收缩压(pulmonary artery systolic pressure,PASP)和平均肺动脉压(mean pulmonary arterial pressure,MPAP),统计急进高原后各组的AMS发病率。结果急进高原后安慰剂组、黄芩苷组和红景天组的AMS发病率分别为58.3%(14/24)、25.0%(8/32)和29.2%(7/24),与安慰剂组比较,黄芩苷组及红景天组AMS发病率明显降低,差异有统计学意义(P<0.05)。与急进高原前比较,各组受试者急进高原后心率、血压及肺动脉压均升高,氧饱和度降低(P<0.05);与安慰剂组比较,黄芩苷组血压及心率明显降低(P<0.05),红景天组急进高原后氧饱和度升高、肺动脉压降低(P<0.05)。结论黄芩苷组可能通过降低血压及心率预防AMS的发生,红景天胶囊可能通过升高氧饱和度,降低PASP、MPAP预防AMS的发生。 相似文献
5.
6.
目的:建立高效液相色谱法(HPLC 法)测定维药蜀葵花中芦丁和紫云英苷的含量。方法采用YMC-Pack ODS-A C18(4.6 mm&#215;250 mm,5μm)色谱柱,以流动相 A(0.2%磷酸水溶液)和流动相 B(0.2%磷酸乙腈溶液)进行梯度洗脱,检测波长为360 nm,流速为0.6 mL/min,进样体积10μL。结果芦丁和紫云英苷分别在0.5~6.0μg/mL 和1.0~12.0μg/mL 浓度范围内呈良好线性关系;线性方程分别为 A =583.5C -0.623和 A =628.3C -0.27,相关系数 r 分别为0.9995和0.9991;芦丁和紫云英苷的平均加样回收率(n =6)分别为102.3%和100.8%,RSD 分别为0.89%和0.60%,蜀葵花样品中芦丁和紫云英苷的含量分别为0.30~0.32 mg/g 和0.43~0.46 mg/g。结论本方法简便、准确,重复性好,可用于维药蜀葵花中芦丁和紫云英苷的含量测定,为其质量控制提供参考。 相似文献
7.
目的观察窄谱中波紫外线(NB-UVB)照射联合外用0.05%地奈德乳膏治疗玫瑰糠疹的临床疗效和安全性。方法 90例患者随机分为治疗组30例(NB-UVB照射及外用0.05%地奈德乳膏)、对照1组30例(外用0.05%地奈德乳膏)和对照2组(NB-UVB照射)30例。评价患者治疗前后红斑、瘙痒及皮损面积的总积分。结果治疗组的治愈时间为(7.86±1.32)d,对照1组为(12.78±1.43)d,对照2组为(12.56±1.89)d,治疗组早于对照1组和2组;治疗组有效率为96.67%,对照1组为63.33%,对照2组为60.00%,治疗组有效率明显高于对照1组和对照2组,差异均有统计学意义(P均<0.001)。结论 NB-UVB照射联合0.05%地奈德乳膏治疗玫瑰糠疹起效快,疗效好,不良反应少。 相似文献
8.
目的探讨红景天对大鼠异丙肾上腺素性心肌缺血性损伤的保护作用。方法采用异丙。肾上腺素(ISO)皮下注射制备SD大鼠心肌缺血性损伤模型,以红景天干预,曲美他嗪作为保护药物参照,50只SD大鼠随机分为5组:正常对照组(A)、ISO损伤组(B)、曲美他嗪组(C)、高剂量红景天组(D)及低剂量红景天组(E)。观察各组大鼠心肌组织病理改变,检测心肌iNOS mRNA水平的表达变化;分析iNOS蛋白质水平表达变化。结果与B组比较,红景天能够明显减轻ISO所致的心肌细胞病理损伤范围和程度,且保护作用与剂量呈正相关。心肌损伤时iNOS mRNA以及蛋白表达均明显增高,而红景天组表达则明显降低且高剂量组较低剂量组表达降低。曲美他嗪作为一种阳性对照药物可以明显减轻大鼠心肌缺血性损伤,其疗效与低剂量红景天相似。结论红景天在心肌缺血性损伤中的保护作用机制可能与其抑制iNOS表达增加有关。 相似文献
9.
10.
In the present study, Plumbago rosea Linn. (Plumbaginaceae), one of the folk medicinal plants commonly used as an antifertility agent, was evaluated for its antifertility effect. Five successive solvent extracts, petroleum ether, chloroform, acetone, ethanol, and water extracts, of the stems of P. rosea were studied on estrous cycle at two dose levels, 200 and 400 mg/kg respectively. Of these, the acetone extract was found to be most effective in interrupting the normal estrous cycle of rats (p < 0.05) (p < 0.01). The rats exhibited prolonged diestrous stage of the estrous cycle with consequent temporary inhibition of ovulation. The antiovulatory activity was reversible on withdrawal of the extract. The effective acetone extract was further studied on estrogenic functionality in rats. The acetone extract showed significant estrogenic and antiestrogenic activity (p < 0.05) (p < 0.001). Histological studies of the uteri further confirmed the estrogenic activity of acetone extract. The results indicated the antifertility activity of stems of Plumbago rosea in female Wistar rats. 相似文献