全文获取类型
收费全文 | 16518篇 |
免费 | 1452篇 |
国内免费 | 495篇 |
专业分类
耳鼻咽喉 | 79篇 |
儿科学 | 101篇 |
妇产科学 | 75篇 |
基础医学 | 846篇 |
口腔科学 | 322篇 |
临床医学 | 1956篇 |
内科学 | 939篇 |
皮肤病学 | 196篇 |
神经病学 | 354篇 |
特种医学 | 453篇 |
外国民族医学 | 1篇 |
外科学 | 821篇 |
综合类 | 3668篇 |
预防医学 | 1709篇 |
眼科学 | 200篇 |
药学 | 2448篇 |
203篇 | |
中国医学 | 3778篇 |
肿瘤学 | 316篇 |
出版年
2024年 | 106篇 |
2023年 | 258篇 |
2022年 | 611篇 |
2021年 | 901篇 |
2020年 | 897篇 |
2019年 | 525篇 |
2018年 | 417篇 |
2017年 | 608篇 |
2016年 | 651篇 |
2015年 | 617篇 |
2014年 | 1452篇 |
2013年 | 1198篇 |
2012年 | 1356篇 |
2011年 | 1343篇 |
2010年 | 997篇 |
2009年 | 802篇 |
2008年 | 709篇 |
2007年 | 763篇 |
2006年 | 659篇 |
2005年 | 581篇 |
2004年 | 441篇 |
2003年 | 414篇 |
2002年 | 347篇 |
2001年 | 314篇 |
2000年 | 215篇 |
1999年 | 179篇 |
1998年 | 139篇 |
1997年 | 140篇 |
1996年 | 126篇 |
1995年 | 113篇 |
1994年 | 93篇 |
1993年 | 76篇 |
1992年 | 63篇 |
1991年 | 48篇 |
1990年 | 51篇 |
1989年 | 27篇 |
1988年 | 30篇 |
1987年 | 24篇 |
1986年 | 20篇 |
1985年 | 29篇 |
1984年 | 24篇 |
1983年 | 19篇 |
1982年 | 17篇 |
1981年 | 11篇 |
1980年 | 11篇 |
1979年 | 11篇 |
1978年 | 8篇 |
1977年 | 5篇 |
1976年 | 8篇 |
1972年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 8 毫秒
21.
Annette Anderton 《Journal of human nutrition and dietetics》1994,7(1):53-60
The HACCP (hazard analysis critical control point) concept is now widely applied in the food industry and provides a structured and critical approach to the identification and control of hazards that may affect food safety. It has shifted the emphasis for control from retrospective end-product testing to the effective control of raw materials and key processing operations.
This paper discusses how the HACCP approach can be applied to enteral feeding. This involves each unit assembling a multidisciplinary team of personnel involved in enteral feeding. This team will then carry out a detailed analysis of the process from selection of ingredients and feeding systems through to consumption of the feed by the patient by constructing a flow chart that relates specifically to each unit. They can then identify and assess the hazards associated with the handling of the product at each stage in the process. This will enable them to identify the points where control over an identified hazard can be achieved (critical control points, CCP) such as quality of ingredients, design of administration systems, preparation and distribution of the feeds and the procedures involved in the assembly and manipulation of the systems. Control and monitoring procedures can then be specified and implemented at relevant stages in the process. The major strengths of the HACCP procedure are that it entails a team effort from key personnel involved in the full range of activities associated with the product and each detailed analysis is specific to each unit's practices and resources and can be continually reviewed and modified in response to changing circumstances. 相似文献
This paper discusses how the HACCP approach can be applied to enteral feeding. This involves each unit assembling a multidisciplinary team of personnel involved in enteral feeding. This team will then carry out a detailed analysis of the process from selection of ingredients and feeding systems through to consumption of the feed by the patient by constructing a flow chart that relates specifically to each unit. They can then identify and assess the hazards associated with the handling of the product at each stage in the process. This will enable them to identify the points where control over an identified hazard can be achieved (critical control points, CCP) such as quality of ingredients, design of administration systems, preparation and distribution of the feeds and the procedures involved in the assembly and manipulation of the systems. Control and monitoring procedures can then be specified and implemented at relevant stages in the process. The major strengths of the HACCP procedure are that it entails a team effort from key personnel involved in the full range of activities associated with the product and each detailed analysis is specific to each unit's practices and resources and can be continually reviewed and modified in response to changing circumstances. 相似文献
22.
以计算机为基础的教学(CBE)在护理领域的应用现状 总被引:2,自引:0,他引:2
随着计算机和网络技术的普及应用,以计算机为基础的教育(Computer Based Education,CBE)特别是多媒体课件的应用在护理教育中越来越受重视。然而,我国CBE在护理领域的应用尚处于起步阶段,也存在着一些缺陷和不足,有待于进一步完善。 相似文献
23.
刘德荣 《福建中医学院学报》2003,13(1):42-44
北宋名医吴本的精湛医术和高尚医德在漳州、泉州和台南民众中久为传颂,流感在慈济宫的“济世仙方药鉴”是现存有关吴本的宝贵医药资料,该药签体现了中医的选方特点和用药特点,今天仍有整理研究的价值。 相似文献
24.
目的了解头孢菌素导致抗生素相关性腹泻的基本情况。方法对64例头孢菌素致抗生素相关性腹泻进行临床观察。结果本组头孢菌素致抗生素相关性腹泻以6个月~3岁年龄组发生率最高。其中第3代头孢菌素所致抗生素相关性腹泻的腹泻程度重于第1代。临床表现和实验室检查均缺乏特异性。结论头孢菌素致抗生素相关性腹泻比较常见,应引起临床医师在用药时的重视。 相似文献
25.
Wang Tao Liang Zhihou Sun Shenggang Cao Xuebing Peng Hai Cao Fei Liu Hongjin Tong E-tang 《华中科技大学学报(医学英德文版)》2003,23(2):145-147
Summary To investigate the distribution of possible novel mutations from parkin gene in variant subset of patients with Parkinson’s
disease (PD) in China and explore whether parkin gene plays an important role in the pathogenesis of PD, 70 patients were
divided into early-onset group and late-onset group; 70 healthy subjects were included as controls. Genomic DNA from 70 normal
controls and from those of PD patients were extracted from peripheral blood leukocytes by using standard procedures. Mutations
of parkin gene (exon 1–12) in all the subjects were screened by PCR-single strand conformation polymorphism (SSCP), and further
sequencing was performed in the samples with abnormal SSCP results, in order to confirm the mutation and its location. A new
missense mutation Gly284Arg in a patient and 3 abnormal bands in SSCP electrophoresis from samples of another 3 patients were
found. All the DNA variants were sourced from the samples of the patients with early-onset PD. It was concluded that Parkin
point mutation also partially contributes to the development of early-onset Parkinson’s disease in Chinese.
WANG Tao, male, born in 1961, Associate Professor
This work was supported by grants from the key program of the special scientific project of Scientific & Technologic Agency
of Hubei Province (Serial No. 2001AA308B01) and the Hygienic Research Project of Hygienic Agency of Hubei province (Serial
No. WJ 01529). 相似文献
26.
电动秋千的研制及其在前庭功能研究中的应用 总被引:1,自引:0,他引:1
本文介绍了带转椅的电动秋千的研制及其使用,包括其工作原理、结构与控制系统的设计、主要技术性能及其在前庭功能与空间运动病研究中的应用。多年的实验证明,这台电动秋千设计合理,技术指标先进,使用性能良好,是研究前庭功能和空间运动病的实用设备。 相似文献
27.
28.
Mari-Ann Flyvholm Barbara M. Hall Tove Agner Eva Tiedemann Peter Greenhill Walter Vanderveken Fred E. Freeberg Torkil Menné 《Contact dermatitis》1997,36(1):26-33
Our purpose was to investigate the eliciting threshold concentration of formaldehyde in formaldehyde-sensitive individuals in the occluded and non-occluded patch teat and to evaluate the relationship in repeated open application test (ROAT) with a product containing a formaldehyde releaser. 20 formaldehyde-sensitive patients and a control group of 20 healthy volunteer were included in the study. Occluded and non-occluded patch tests with formaldehyde solutions form 25 to 10,000 ppm. and ROAT for I week with a leave-on cosmetic product containing on average 300 ppm formaldehyde. Were carried out simultaneously on each subject. In the occluded patch test. 1/2 of the 20 patients only reacted to 10,000 ppm formaldehyde. 9 reacted to 5,000 ppm. 3 reacted to 1.000 ppm. 2 reacted to 500 ppm and I reacted to 25 ppm. No definite positive reactions were observed in the non-occluded patch test or in the ROAT No positive reactions were observed in the control group to any of the test procedures. We concluded that the threshold concentration for occluded patch test to formaldehyde in formaldehyde-sensitive patients was 250 ppm. The threshold in occluded patch test corresponded to the degree of sensitivity Definite positive reactions in the ROAT were not seen, either indicating that they are unlikely to happen with the type of product used or that the exposure time was too short. 相似文献
29.
30.
临床护理路径在臀肌挛缩症患者健康教育中的应用 总被引:1,自引:1,他引:0
目的 探讨应用临床护理路径对臀肌孪缩症患者健康教育的效果。方法 将60例臀肌挛缩症患者分为对照组(n=30)和实验组(n=30),对照组采用常规教育方法,实验组按制定好的健康教育路径进行教育,将两组患者的健康教育达标率、对护理工作的满意度进行比较。结果 两组患者在健康教育达标率、对护理工作的满意度方面比较,差异有统计学意义(P〈0.01)。结论 对臀肌挛缩症患者运用护理手段进行健康教育后提高了患者的健康教育达标率,提高了护理工作的满意度,效果优于常规教育方法。 相似文献