全文获取类型
收费全文 | 11605篇 |
免费 | 575篇 |
国内免费 | 45篇 |
专业分类
耳鼻咽喉 | 108篇 |
儿科学 | 761篇 |
妇产科学 | 297篇 |
基础医学 | 1220篇 |
口腔科学 | 219篇 |
临床医学 | 752篇 |
内科学 | 2476篇 |
皮肤病学 | 340篇 |
神经病学 | 593篇 |
特种医学 | 395篇 |
外国民族医学 | 1篇 |
外科学 | 1648篇 |
综合类 | 295篇 |
一般理论 | 13篇 |
预防医学 | 464篇 |
眼科学 | 537篇 |
药学 | 1140篇 |
中国医学 | 52篇 |
肿瘤学 | 914篇 |
出版年
2023年 | 86篇 |
2022年 | 172篇 |
2021年 | 336篇 |
2020年 | 195篇 |
2019年 | 262篇 |
2018年 | 312篇 |
2017年 | 241篇 |
2016年 | 298篇 |
2015年 | 298篇 |
2014年 | 414篇 |
2013年 | 572篇 |
2012年 | 826篇 |
2011年 | 873篇 |
2010年 | 477篇 |
2009年 | 358篇 |
2008年 | 647篇 |
2007年 | 615篇 |
2006年 | 532篇 |
2005年 | 504篇 |
2004年 | 463篇 |
2003年 | 408篇 |
2002年 | 391篇 |
2001年 | 299篇 |
2000年 | 305篇 |
1999年 | 250篇 |
1998年 | 101篇 |
1997年 | 81篇 |
1996年 | 92篇 |
1995年 | 67篇 |
1994年 | 57篇 |
1993年 | 50篇 |
1992年 | 123篇 |
1991年 | 163篇 |
1990年 | 128篇 |
1989年 | 116篇 |
1988年 | 108篇 |
1987年 | 77篇 |
1986年 | 85篇 |
1985年 | 91篇 |
1984年 | 66篇 |
1983年 | 70篇 |
1979年 | 66篇 |
1978年 | 44篇 |
1977年 | 35篇 |
1975年 | 34篇 |
1973年 | 38篇 |
1972年 | 41篇 |
1971年 | 44篇 |
1969年 | 32篇 |
1968年 | 44篇 |
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
71.
O Mukherjee P Meera S Ghosh S Kubendran K Kiran K R Manjunath M N Subhash V Benegal S K Brahmachari P P Majumder S Jain 《American journal of medical genetics. Part B, Neuropsychiatric genetics》2006,(8):868-873
The genetic basis of bipolar disorder (BPD) and schizophrenia (SCZ) has been established through numerous clinical and molecular studies. Although often considered separate nosological entities, evidence now suggests that the two syndromes may share some genetic liability. Recent studies have used a composite phenotype (psychosis) that includes BPD, SCZ, psychosis not otherwise specified, and schizoaffective disorder, to identify shared susceptibility loci. Several chromosomal regions are reported to be shared between these syndromes (18p, 6q, 10p, 13q, 22q). As a part of our endeavor to scan these regions, we report a positive linkage and association finding at 18p11.2 for psychosis. Two-point linkage analysis performed on a series of 52 multiplex pedigrees with 23 polymorphic markers yielded a LOD score of 2.02 at D18S37. An independent set of 159 parent offspring trios was used to confirm this suggestive finding. The TDT analysis yielded support for association between the marker D18S453 and the disease allele (chi2 = 4.829, P < 0.028). This region has been implicated by several studies on BPD [Sjoholt et al. (2004); Mol Psychiatry 9(6):621-629; Washizuka et al. (2004); Biol Psychiatry 56(7):483-489; Pickard et al. (2005); Psychiatr Genet 15(1):37-44], SCZ [Kikuchi et al. (2003); J Med Dent Sci 50(3):225-229; Babovic-Vuksanovic et al. (2004); Am J Med Genet 124(3):318-322] and also as a shared region between the two diseases [Ishiguro et al. (2001); J Neural Transm 108(7):849-854; Reyes et al. (2002); Mol Psychiatry 7(4):337-339; Craddock et al. (2005); J Med Genet 42(3):193-204]. Our findings provide an independent validation of the above reports, and suggest the presence of susceptibility loci for psychoses in this region. 相似文献
72.
73.
We report the case of a premature neonate with ascites and dysmorphic facial features at birth. The chromosomal analysis showed an interstitial deletion of chromosome 10, that is, 46, XX, del(10)(q22.3q24.1). This is the first known case of a patient with interstitial deletion of chromosome 10 with symptoms of ascites and hydrops. 相似文献
74.
Gelatinous marrow transformation (GMT) is an uncommon and poorly recognized condition characterized by deposition of seromucinous gelatinous material in the bone marrow stroma. Forty-three cases of GMT were studied in a period of 4 years. There was male preponderance. Fourteen cases were in pediatric age group (less than 12 years). Majority of patients had a preceding history of anorexia, malnutrition and chronic debility. All the patients had anemia. Bone marrow biopsy revealed focal or diffuse GMT. Bone marrow aspirate showed metachromatic dense mucoid material with a few entrapped hematopoietic cells on Giemsa staining. The gelatinous material stained with alcian blue at pH 2.5. 相似文献
75.
We report on the cytopathologic findings of a Leydig-cell tumor of the testis in a young adult male with no evidence of endocrine dysfunction. The preoperative diagnosis was based on fine-needle aspiration cytology (FNAC) alone, which was subsequently confirmed on histopathology. The present case was of interest on account of the paucity of literature regarding the cytodiagnosis of this lesion. In addition, the finding of intracytoplasmic lipofuscin pigment and several intracytoplasmic as well as intranuclear Reinke's crystals served to clinch the diagnosis on FNA. Therefore, the use of FNAC, especially in the presence of diagnostic Reinke's crystals, may vitiate the need for more invasive biopsy procedures in the preoperative diagnosis of testicular Leydig-cell tumors. 相似文献
76.
The effect of dietary supplementation with Vitamin E was studied in sensitized guinea pigs. After measurement of baseline airway reactivity and sensitization with ovalbumin, the animals were randomized into two groups: Group A, on a commercial feed and Group B, on dietary supplementation with oral Vitamin E (0.7 IU/kg). These were challenged with inhaled ovalbumin after 4 weeks. The following outcomes were studied: airway responses to ovalbumin inhalation, airway reactivity, sodium and calcium ion influx in isolated tracheal cells, Na+ K+ ATPase and Ca2+ ATPase activity in tracheal homogenate and plasma malonaldehyde. Sensitization increased airway reactivity in Group A but not in Group B. The tracheal cells of animals in Group B showed significantly lower rates of 45Ca and 22Na influx and lower activities of tracheal Na+ K+ ATPase and Ca2+ ATPase as compared to Group A. Plasma malonaldehyde was similar between two groups. We concluded that Vitamin E suppresses the increase in airway reactivity following sensitization and has membrane stabilizing actions. 相似文献
77.
Jain S Bhargava K Sawlani KK Daga MK Gaiha M 《The Journal of the Association of Physicians of India》1999,47(4):444-446
Muscle involvement in hypothyroidism commonly manifests as fatigue, myalgias, stiffness and slowed reflexes. We report a case of transient acute renal failure related to rhabdomyolysis and myoglobinuria in a 40 year old man that revealed the diagnosis of hypothyroidism with myopathy. The patient had proximal muscle weakness and tenderness, markedly raised muscle enzymes and deranged renal functions that normalised with thyroid replacement therapy. Hypothyroidism, though rare, should be considered a definite and authentic cause of rhabdomyolysis. 相似文献
78.
The cytologic appearance of epithelioid sarcoma in fine-needle aspiration biopsy cytology (FNABC) smears has not been extensively described. We report a case of epithelioid sarcoma in a 55-year-old male who presented with nodular swellings in the abdominal wall and scrotum. The scrotal swelling was subsequently demonstrated to arise from the vas deferens. We highlight the cytomorphologic, immunocytochemical, and histopathologic features of this rare lesion in an unusual site, with particular emphasis on the dilemma encountered in the cytodiagnosis of this lesion. 相似文献
79.
Parul Jain Urmila Singh Vijay Kumar Rashmi Ratnam Amita Jain 《Indian journal of medical microbiology》2022,40(3):365-369
PurposeCartridge based nucleic acid amplification test (CBNAAT) has been endorsed by the WHO as the screening test for diagnosing extrapulmonary tuberculosis (EPTB). In the present study we report the agreement between CBNAAT (Xpert MTB/RIF), liquid culture (LC) and line probe assay (LPA) for diagnosis of Mycobacterium tuberculosis and detection of drug resistance among EPTB cases.MethodsThe EP samples were subjected to CBNAAT (Xpert MTB/RIF, Cepheid, USA) and wherever possible, to LC (MGIT 960, Becton Dickinson, USA) followed sequentially by first line and second line-LPA (FL-LPA, SL-LPA, Hain Lifescience, Germany) on the isolates.ResultsTotal 566/4080 (13.9%) EP samples were detected positive for M. tuberculosis on CBNAAT. Aspirates from lymph nodes were most often positive (11/30; 36.6%), followed by pus (240/873; 27.5%) and CSF samples (166/104; 15.8%). The detection of M. tuberculosis was more in adults than children except in tissue biopsy samples. Rifampicin resistance was also higher among adults except CSF in which resistance was more in children. Total 185 of 566 (32.7%) CBNAAT positive and 770 of 3510 (21.9%) CBNAAT negative samples could be cultured of which 110/185 (59.4%) and 33/770 (4.3%) respectively turned positive. FL-LPA and SL-LPA of 143 culture isolates showed that 27 isolates had drug resistance, of which 3 (2.1%) were XDR, 11 (7.7%) were Pre-XDR (FQ) and 13 (9.1%) were MDR. Of these 27 resistant isolates, 12 were negative by CBNAAT and two were mislabeled as Rifampicin sensitive or indeterminate based on the unique RpoB gene mutation patterns on LPA. The positive and negative agreements between LC and CBNAAT for detection of M. tuberculosis were 67.1% and 92.7% respectively and between LPA and CBNAAT for rifampicin resistance detection were 98.9% and 92.9% respectively.ConclusionsFor EPTB, CBNAAT should be accompanied with LC wherever possible irrespective of the CBNAAT result. 相似文献
80.
Alcoholic cirrhosis is one of the most common indications for liver transplantation. Previous researchers have studied rates of return to drinking following transplantation, however, few have employed prospective measures of alcohol use. The authors prospectively studied the alcohol use of patients transplanted for alcoholic liver disease. The authors improved the accuracy of monitoring alcohol use by using various methods for tracking patient's alcohol consumption, and we report on the time to first alcohol use after transplantation comparing these different methods. The authors found that alcohol use can occur very early after transplantation, even within the first 3 months posttransplant. Thirty-eight percent of the patients consumed any alcohol after transplantation. The clinical interviews by the psychiatrist were the most successful method for identifying posttransplant alcohol use. Posttransplant alcohol use was significantly associated with prior nonalcohol substance use (P < 0.025), family history of alcoholism in a first-degree relative (P < 0.025), and prior alcohol rehabilitation experience (P < 0.05) but not with a prior psychiatric history or less than 6 months of pretransplant sobriety. The authors indicate that prospective monitoring, using a combination of methods, is the most accurate approach to identify alcohol consumption. With this type of accuracy, risk factors can be identified and alcohol use can be compared with alcohol-related morbidity posttransplant. 相似文献