Author Keywords: Event-related potentials; females; menstrual cycle 相似文献
全文获取类型
收费全文 | 25169篇 |
免费 | 1652篇 |
国内免费 | 48篇 |
专业分类
耳鼻咽喉 | 202篇 |
儿科学 | 879篇 |
妇产科学 | 705篇 |
基础医学 | 3100篇 |
口腔科学 | 263篇 |
临床医学 | 3953篇 |
内科学 | 4546篇 |
皮肤病学 | 297篇 |
神经病学 | 2484篇 |
特种医学 | 532篇 |
外科学 | 2054篇 |
综合类 | 278篇 |
一般理论 | 64篇 |
预防医学 | 3680篇 |
眼科学 | 334篇 |
药学 | 1443篇 |
1篇 | |
中国医学 | 27篇 |
肿瘤学 | 2027篇 |
出版年
2023年 | 96篇 |
2022年 | 155篇 |
2021年 | 428篇 |
2020年 | 290篇 |
2019年 | 455篇 |
2018年 | 551篇 |
2017年 | 428篇 |
2016年 | 442篇 |
2015年 | 497篇 |
2014年 | 781篇 |
2013年 | 1243篇 |
2012年 | 1795篇 |
2011年 | 1874篇 |
2010年 | 1024篇 |
2009年 | 895篇 |
2008年 | 1723篇 |
2007年 | 1822篇 |
2006年 | 1804篇 |
2005年 | 1843篇 |
2004年 | 1761篇 |
2003年 | 1668篇 |
2002年 | 1540篇 |
2001年 | 172篇 |
2000年 | 123篇 |
1999年 | 237篇 |
1998年 | 339篇 |
1997年 | 246篇 |
1996年 | 239篇 |
1995年 | 226篇 |
1994年 | 192篇 |
1993年 | 183篇 |
1992年 | 116篇 |
1991年 | 107篇 |
1990年 | 85篇 |
1989年 | 99篇 |
1988年 | 81篇 |
1987年 | 74篇 |
1986年 | 77篇 |
1985年 | 83篇 |
1984年 | 115篇 |
1983年 | 115篇 |
1982年 | 136篇 |
1981年 | 122篇 |
1980年 | 113篇 |
1979年 | 58篇 |
1978年 | 65篇 |
1977年 | 63篇 |
1976年 | 47篇 |
1975年 | 43篇 |
1974年 | 43篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
31.
Multiple sclerosis (MS) is a highly variable, unpredictable disease and one of the most life-altering diagnoses a person can receive. Because it usually strikes in the prime of life, frequently progresses to disability, and has no cure, MS can make a strong emotional impact--not only on those who suffer from it, but also the healthcare team. Because MS is such a complex, multifaceted disorder, nurses who care for people with MS are faced with numerous clinical challenges. Many of the challenges are unique to MS, demanding, and time-consuming. Well-informed nurses are positioned to evaluate and explain the disease process, assist in the alleviation of symptoms, educate partners and families, and help improve quality of life. A case example can help nurses understand the real-life concerns of a person with MS. 相似文献
32.
33.
Denise L Hawthorne Nancy J Yurkovich 《Revue canadienne de recherche en sciences infirmières》2002,34(2):53-64
Nursing is a profound human activity generally influenced by two dynamics--the relationship between patient and nurse and the scientific paradigm. Often overlooked, however, are the incongruities that arise between these two dynamics. The patient-nurse relationship encompasses sameness, closeness, and connection, whereas science requires distance, detachment, and differentiation to fulfil the demands of objectivity. The patient-nurse relationship is both profound and intangible, whereas science attends only to that which can be observed and measured. The authors explore these dynamics and the incongruities between them. They consider the demands made by science on the patient-nurse relationship and, conversely, the place of the patient-nurse relationship in the development of nursing as science. These issues are critical to the advancement and practice of nursing. 相似文献
34.
Nancy Kluck Sean O'Connor Victor Hesselbrock Allan Tasman Donald Maier Lance Bauer 《Progress in neuro-psychopharmacology & biological psychiatry》1992,16(6):901-911
Nancy Kluck, Scan J. O'Connor, Victor M. Hesselbrock, Allan Tasman and Donald Maier, Lance Bauer: Variation in Evoked Potential Measures Over the Menstrual Cycle: A Pilot Study. Prog. Neuro. Psychopharmacol. Biol. Psychiat. 1992. 16(6): 901–911.
1. 1. The P3 component of a visual event related potential (ERP) was studied for five consecutive weeks in six women with normal menstrual cycles. Serum concentrations of luteinizing hormone (LH), estradiol (E2) and progesterone were studied during the same period.
2. 2. Increases in P3 amplitude, although nonsignificant, were noted in the week preceding onset of menses.
3. 3. No significant changes in reaction times to target/nontarget stimuli were noted over the same time period.
35.
36.
Nurses need to take advantage of multiple internships and fellowships to learn about and experience the daily work of making health policy in Washington, DC. This article lists several of the current programs available for nurses and other health professionals. These internships and fellowships are career-changing experiences. Additionally, new relationships will be built with other health professionals that nurses will be able to use for years to come. Finally, if one of the structured experiences doesn't fit the nurse's timeframe, there is always the possibility to create a special internship to meet the nurse's needs. 相似文献
37.
Nancy I Thomas Norman DePaul Brown Linda C Hodges Jay Gandy Louanne Lawson Janet E Lord David K Williams 《AAOHN journal》2006,54(1):24-31
The Central Arkansas Veterans Healthcare System (CAVHS) spends $1 million annually on occupational illnesses and injuries. To address the problem of injuries among hospital employees, a retrospective case-control study was conducted to examine select risk factors for work-related injuries (WRI) among CAVHS employees. Study methods included a review of employee health charts and computer and manual databases from 1997 to 2002 (N = 2,050). The researchers found that WRI increased with age; WRI occurred more often in women than in men; WRI was greater among maintenance and custodial staff compared to direct caregivers, and less among clerical staff; WRI occurred less often in part-time than full-time staff; and WRI increased with increasing body mass index. Developing standards, guidelines, and policies for preplacement screening, preventive measures, training, and education may help to minimize WRI and associated costs. 相似文献
38.
39.
Jun Gu Yang O Huh Feng Jiang Nancy P Caraway Jorge E Romaguera Tanweer M Zaidi Ricardo L Fernandez Huazhong Zhang Issa F Khouri Ruth L Katz 《Modern pathology》2004,17(5):553-560
Mantle cell lymphoma is non-Hodgkin's B-cell lymphoma characterized by the t(11;14)(q13;q32) translocation. Peripheral blood involvement of mantle cell lymphoma is usually associated with a poor prognosis and therefore, its identification is clinically important. In this study, we performed cyclin D1/IgH-probe fusion fluorescence in situ hybridization analysis on 223 peripheral blood samples: 185 from 125 mantle cell lymphoma patients, and 38 normal controls. The cutoff values for the test were established using normal controls. Flow cytometry on peripheral blood and corresponding bone marrow samples was used to evaluate this test. In all, 26% of the 185 peripheral blood samples and 27% of the 161 corresponding bone marrow samples were flow cytometry positive for mantle cell lymphoma. The mean numbers of single and- double-fusion signals and the mean number of CD5/CD19-positive cells, absolute blood lymphocyte count, and white blood cell count were significantly higher in peripheral blood and corresponding bone marrow samples with mantle cell lymphoma-positive flow cytometry. Double-fusion signals were more specific than single-fusion ones. Fluorescence in situ hybridization was far more likely to be positive for mantle cell lymphoma when the peripheral blood and the corresponding bone marrow samples had positive flow cytometry results or morphology (P<0.01). Our study indicates that cyclin D1/IgH-fusion fluorescence in situ hybridization analysis could be used to determine the presence and character of circulating mantle cell lymphoma cells in peripheral blood, thus enhancing our ability to evaluate leukemic mantle cell lymphoma and minimum residual disease. 相似文献
40.
Nancy J Keuthen Nikos Makris John E Schlerf Brian Martis Cary R Savage Katherine McMullin Larry J Seidman Jeremy D Schmahmann David N Kennedy Steven M Hodge Scott L Rauch 《Neuropsychopharmacology》2007,61(3):374-381
BACKGROUND: Limited knowledge exists regarding the neurobiology of trichotillomania (TTM). Cerebellum (CBM) volumes were explored, given its role in complex, coordinated motor sequences. METHODS: Morphometric magnetic resonance imaging (MRI) scans were obtained for 14 female subjects with DSM-IV diagnoses of TTM and 12 age-, education-, and gender-matched normal control (NC) participants. Parcellation was performed utilizing a recently developed methodology to measure subterritory volumes of the CBM. Regions were defined based on knowledge of the structural and functional subunits of the CBM. RESULTS: As predicted, significant group differences were reported for CBM raw cortical volumes (p = .008) that survived correction for total brain volume (TBV; p = .037) and head circumference (HC; p = .011). A priori and post hoc group raw volume comparisons for CBM subterritories and functional clusters revealed many significant differences. However, most differences failed to withstand correction for total CBM volumes (TCV). Smaller volumes were consistently reported for the TTM versus NC cohorts. Total Massachusetts General Hospital Hair Pulling Scale (MGHHPS) scores were significantly inversely correlated with left primary sensorimotor cluster volumes (p = .008), with smaller volumes associated with more severe TTM symptoms. CONCLUSIONS: These findings implicate the CBM in the neurobiology of TTM, with reduced subterritory volumes reported for the TTM versus NC groups. 相似文献