全文获取类型
收费全文 | 1706篇 |
免费 | 87篇 |
国内免费 | 6篇 |
专业分类
耳鼻咽喉 | 34篇 |
儿科学 | 134篇 |
妇产科学 | 215篇 |
基础医学 | 119篇 |
口腔科学 | 25篇 |
临床医学 | 129篇 |
内科学 | 380篇 |
皮肤病学 | 28篇 |
神经病学 | 104篇 |
特种医学 | 58篇 |
外科学 | 299篇 |
综合类 | 34篇 |
一般理论 | 1篇 |
预防医学 | 39篇 |
眼科学 | 33篇 |
药学 | 88篇 |
中国医学 | 5篇 |
肿瘤学 | 74篇 |
出版年
2023年 | 13篇 |
2022年 | 23篇 |
2021年 | 24篇 |
2020年 | 19篇 |
2019年 | 26篇 |
2018年 | 50篇 |
2017年 | 32篇 |
2016年 | 49篇 |
2015年 | 52篇 |
2014年 | 57篇 |
2013年 | 97篇 |
2012年 | 118篇 |
2011年 | 121篇 |
2010年 | 63篇 |
2009年 | 62篇 |
2008年 | 124篇 |
2007年 | 151篇 |
2006年 | 123篇 |
2005年 | 139篇 |
2004年 | 116篇 |
2003年 | 113篇 |
2002年 | 88篇 |
2001年 | 37篇 |
2000年 | 26篇 |
1999年 | 26篇 |
1998年 | 5篇 |
1997年 | 2篇 |
1996年 | 1篇 |
1995年 | 3篇 |
1994年 | 1篇 |
1993年 | 1篇 |
1992年 | 7篇 |
1991年 | 3篇 |
1990年 | 3篇 |
1989年 | 5篇 |
1988年 | 6篇 |
1987年 | 4篇 |
1986年 | 1篇 |
1985年 | 4篇 |
1982年 | 1篇 |
1975年 | 1篇 |
1968年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有1799条查询结果,搜索用时 15 毫秒
71.
The clinic usage of cisplatin, an anticancer drug, is limited due to it has many side effects in many systems and organs. In this context, it was aimed to investigate the protective effect of hesperidin, a citrus flavonoid, on testicular and spermatological damages induced by cisplatin in rats. The rats were randomly divided into four groups. The first group was kept as a control. In the second groups, cisplatin was given at the single dose of 7 mg kg?1 intraperitoneally. In the third group, hesperidin was orally administered at the dose of 50 mg/kg day?1 for 14 days. In the fourth group, cisplatin and hesperidin were given together at the same doses. Cisplatin treatment caused significant reductions enzymatic (SOD, CAT and GPx) and nonenzymatic (GSH) antioxidants and significant induction level of TBARS. In addition, cisplatin treatment caused decreased sperm motility, epididymal sperm concentration, increased abnormal sperm rate and histopathological damage. In contrast, hesperidin treatment significantly attenuated the harmful effects. In conclusion, this study clearly demonstrated that hesperidin has protective effects on cisplatin‐induced reproductive system toxicity depending on its antioxidant properties. Thus, it is thought that hesperidin may be useful against cisplatin toxicity in patients with cancer in terms of reproductive system. 相似文献
72.
73.
Hüsniye Aylin Hakyemez Bayram Veyseller Feriha Ozer Serkan Ozben Gulum Ivgin Bayraktar Defne Gurbuz Sibel Cetin Yavuz Selim Yildirim 《Journal of clinical neuroscience》2013,20(10):1469-1470
We aimed to investigate the relationship between olfactory function and olfactory bulbus (OB) volume, disease duration and Unified Parkinson’s disease rating scale (UPDRS) scores in early stage idiopathic Parkinson’s disease patients. The University of Pennsylvania Smell Identification Test (UPSIT) was used for the evaluation of olfactory function. UPSIT scores for patients with Parkinson’s disease were significantly lower than controls. There was no significant difference between stage 1 and stage 2 patients. OB volumes were higher in stage 1 and 2 patients than controls, but there was no statistical difference between the three groups. No significant correlation was found between UPSIT and UPDRS total scores, nor between UPSIT scores and disease duration in stage 1 and 2 patients. According to our results, we propose UPSIT be used as a screening test to diagnose presymptomatic patients, but not OB volumes. 相似文献
74.
Our study sought to identify early predictive factors of medically intractable childhood epilepsy. A cohort of epileptic children from the city of Mersin was retrospectively investigated. All patients received care from the same Department of Pediatric Neurology. The epileptic cohort was divided into a drug-responsive epilepsy group and an intractable epilepsy group. Intractable epilepsy is defined as continued seizures in children despite adequate therapy with two or more antiepileptic drugs for more than 18 months. Strong univariate association was observed between intractability and several factors: age of onset, high initial seizure frequency, symptomatic etiology, mixed seizure types, previous history of status epilepticus, febrile and neonatal seizures, mental and motor developmental delay, multiple seizures in 1 day, electroencephalogram abnormalities, magnetic resonance imaging findings, and specific epileptic syndromes. Logistic regression analysis revealed that a previous history of epilepticus status, abnormal electroencephalogram results, and multiple seizures in 1 day comprise independent predictors of medically intractable childhood epilepsy. We suggest that medical intractability in childhood epilepsy can be predicted by monitoring these factors. Along with early prediction, alternative therapies may be designed to provide patients better seizure control and quality of life. 相似文献
75.
Semiz UB Cetin M Basoglu C Ebrinc S Uzun O Herken H Balibey H Algul A Ates A 《Progress in neuro-psychopharmacology & biological psychiatry》2007,31(6):1330-1336
BACKGROUND: Several lines of evidence suggest that clozapine is more effective than both first- and second-generation antipsychotic drugs in treatment-resistant schizophrenia (TRS). However, clinicians appear to be hesitant to prescribe this drug. It would therefore be extremely valuable if predictors of response to clozapine could be identified. The aim of this study was to evaluate the predictive factors of clinical responses to clozapine in a group of Turkish patients with TRS. METHODS: This was a 16-week uncontrolled open study carried out among 97 TRS patients (80 males and 17 females; DSM-IV diagnosis). All patients fulfilled the criteria for refractory schizophrenia according to the UK guidelines for the National Institute of Clinical Excellence (NICE). After all previous antipsychotic medications had run their course, the patients were started on clozapine according to a standardized titration and dosage schedule. Psychopathology was evaluated before the initiation of clozapine therapy and once every 4 weeks using the Brief Psychiatric Rating Scale (BPRS), the Scale for the Assessment for Positive Symptoms, and the Scale for the Assessment of Negative Symptoms. RESULTS: Of the TRS patients on clozapine, 55.7% achieved a clinical response, defined as at least a 20% decrease in BPRS. We observed a favorable effect of clozapine on both positive and negative symptoms. Logistic regression analysis showed that a good clozapine response was more likely when schizophrenia began at a later age, when negative symptoms were severe, and when patients had an early response at 4 weeks. CONCLUSION: A combination of demographic, baseline clinical, and acute treatment response variables may accurately predict response to clozapine in TRS. Priority should be given to initiating clozapine at the earliest phase of TRS, especially for patients with evident negative symptoms. 相似文献
76.
77.
78.
Aims: The aims of the present study were to examine the rate of nightmare disorder (ND) and to determine the levels of dream anxiety and subjective sleep quality in patients with borderline personality disorder (BPD). Another aim was to determine whether dream anxiety was associated with childhood trauma, dissociative experiences, and subjective sleep disturbance in BPD patients. Finally, the hypothesis as to whether BPD patients with ND exhibited a more severe clinical profile than those without ND, was also tested.
Methods: A total of 88 borderline patients and 100 age- and sex-matched healthy control subjects were assessed using the Structured Clinical Interview for DSM-III-R Personality Disorders, Structured Clinical Interview for DSM-IV Axis I Disorders, Van Dream Anxiety Scale, Pittsburgh Sleep Quality Index, Dissociative Experiences Scale, and Traumatic Experiences Checklist. Subjects with codiagnoses that could affect sleep were not included.
Results: BPD patients suffered a significantly greater rate of nightmares, elevated levels of dream anxiety, and disturbed sleep quality than did controls. In the borderline group, heightened dream anxiety was correlated with higher rates of early traumatic experiences and dissociative symptoms, and impaired sleep quality. Furthermore, borderline patients with ND exhibited greater psychopathology as compared to those without ND in terms of several clinical characteristics.
Conclusions: The present study provides support for a strong association between BPD, distressing nightmares, and subjective sleep quality. Recognition and management of dream and sleep disturbances in BPD patients might lead to improvements in their global clinical picture. 相似文献
Methods: A total of 88 borderline patients and 100 age- and sex-matched healthy control subjects were assessed using the Structured Clinical Interview for DSM-III-R Personality Disorders, Structured Clinical Interview for DSM-IV Axis I Disorders, Van Dream Anxiety Scale, Pittsburgh Sleep Quality Index, Dissociative Experiences Scale, and Traumatic Experiences Checklist. Subjects with codiagnoses that could affect sleep were not included.
Results: BPD patients suffered a significantly greater rate of nightmares, elevated levels of dream anxiety, and disturbed sleep quality than did controls. In the borderline group, heightened dream anxiety was correlated with higher rates of early traumatic experiences and dissociative symptoms, and impaired sleep quality. Furthermore, borderline patients with ND exhibited greater psychopathology as compared to those without ND in terms of several clinical characteristics.
Conclusions: The present study provides support for a strong association between BPD, distressing nightmares, and subjective sleep quality. Recognition and management of dream and sleep disturbances in BPD patients might lead to improvements in their global clinical picture. 相似文献
79.
80.
Giant Cervical Polyp Due to a Foreign Body in a ''Virgin'' 总被引:1,自引:0,他引:1
Nihat Aridogan MD M. Turan Cetin MD Oktay Kadayifci MD Yilmaz Atay MD Ufuk Bisak MD 《The Australian & New Zealand journal of obstetrics & gynaecology》1988,28(2):146-147
A 17-year-old virgin who had a giant cervical polyp which had developed through a foreign body and protruded out of the hymen was evaluated; the aetiological significance of the foreign body in the formation of the cervical polyp is discussed. 相似文献