全文获取类型
收费全文 | 10319篇 |
免费 | 510篇 |
国内免费 | 36篇 |
专业分类
耳鼻咽喉 | 97篇 |
儿科学 | 703篇 |
妇产科学 | 276篇 |
基础医学 | 1129篇 |
口腔科学 | 202篇 |
临床医学 | 599篇 |
内科学 | 2043篇 |
皮肤病学 | 314篇 |
神经病学 | 531篇 |
特种医学 | 277篇 |
外国民族医学 | 1篇 |
外科学 | 1523篇 |
综合类 | 271篇 |
一般理论 | 11篇 |
预防医学 | 419篇 |
眼科学 | 507篇 |
药学 | 1102篇 |
中国医学 | 52篇 |
肿瘤学 | 808篇 |
出版年
2023年 | 69篇 |
2022年 | 165篇 |
2021年 | 314篇 |
2020年 | 167篇 |
2019年 | 233篇 |
2018年 | 268篇 |
2017年 | 217篇 |
2016年 | 268篇 |
2015年 | 266篇 |
2014年 | 362篇 |
2013年 | 508篇 |
2012年 | 717篇 |
2011年 | 767篇 |
2010年 | 416篇 |
2009年 | 305篇 |
2008年 | 551篇 |
2007年 | 522篇 |
2006年 | 448篇 |
2005年 | 423篇 |
2004年 | 402篇 |
2003年 | 333篇 |
2002年 | 320篇 |
2001年 | 289篇 |
2000年 | 291篇 |
1999年 | 243篇 |
1998年 | 92篇 |
1997年 | 65篇 |
1996年 | 82篇 |
1995年 | 63篇 |
1994年 | 46篇 |
1993年 | 43篇 |
1992年 | 117篇 |
1991年 | 159篇 |
1990年 | 126篇 |
1989年 | 106篇 |
1988年 | 107篇 |
1987年 | 75篇 |
1986年 | 85篇 |
1985年 | 89篇 |
1984年 | 65篇 |
1983年 | 68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 31 毫秒
41.
42.
43.
S. S. Borwankar L. S. Kasat A. Naregal M. Jain R. Bajaj 《Pediatric surgery international》1998,14(1-2):129-130
A case of covered exstrophy without sequestration of a bowel segment is reported. A 4-year-old female presented with dribbling
of urine. Treatment to date has been simple excision of the covered membrane with functional closure of the bladder and bilateral
posterior iliac osteotomies, with reconstruction of the bladder neck and genitalia to be performed at a later date. The embryogenesis
of this rare variant, a review of the reported cases, and management options are discussed.
Accepted: 6 November 1997 相似文献
44.
Jain A Jain S Chowdhury V Mukhopadhyay S Aggarwal A Kar P 《The Journal of the Association of Physicians of India》1999,47(7):730-732
Pancreatic adenocarcinoma can present with a vast spectrum of rare manifestations. It usually occurs after the age of 50 years, the peak incidence being in sixth and seventh decades. We report a previously asymptomatic subject of pancreatic adenocarcinoma who presented for the first time with massive upper gastrointestinal hemorrhage. Endoscopy revealed ruptured esophageal varices which were secondary to tumour-induced thrombosis of the portal vein. Besides the uncommon mode of presentation, the patient was unusual because of his young age. Further, he was non-icteric at the time of presentation and remained so throughout the clinical course despite having a large lesion in the head of the pancreas. 相似文献
45.
A. Bartoli Brenda A. Cross A. Guz S. K. Jain M. I. M. Noble Diana W. Trenchard 《The Journal of physiology》1974,240(1):91-109
1. The inhalation of CO(2) produces a tachypnoea only in the presence of intact vagus nerves; the present study was designed to examine the mechanism of this phenomenon in the dog.2. Closed-chest cardiopulmonary bypass was established in dogs weighing 16-24 kg, anaesthetized with chloralose. When the ;bypass' was established pulmonary blood flow ceased, P(A, CO2) was reduced and the respiratory rate slowed. 3-10% CO(2) in O(2) could then be inhaled without change in the level of P(a, CO2) set at the oxygenator.3. The addition of CO(2) in these concentrations to the inspired oxygen resulted in an increase in respiratory frequency, maximal at the first breath and sustained for the 1 min period of exposure. The increase in respiratory frequency was due to a shortening of expiratory duration. Inspiratory duration did not change. The response was absent after vagotomy.4. Inert gases in O(2), given as a control, had no effect on breathing.5. The effect of raising P(a, CO2) (by increasing the concentration of CO(2) in the gas equilibrating the blood in the oxygenator), was primarily to increase tidal volume.6. The ventilatory effect of inspiring CO(2)/O(2) mixtures was shown to be additive to the effect of raising P(a, CO2).7. These experiments show that an afferent vagal reflex originating from the lungs causes tachypnoea, when a dog, on ;bypass', inhales low concentrations of CO(2) in O(2). 相似文献
46.
Ameloblastic fibroma of the jaw is a rare, benign mixed odontogenic tumor, having little tendency for local invasion and a low recurrence rate. Cytologic distinction from ameloblastoma, ameloblastic fibrosarcoma, and intraosseous adenoid cystic carcinoma is necessary, in view of the different biologic behavior. A painful, slow-growing swelling of the jaw in a 5-yr-old child clinicoradiologically considered as a benign cystic lesion was aspirated. Sheets of small monomorphic epithelial cells with peripheral palisading by columnar cells were seen on cytology smears. The striking feature was central hyaline globules in some tubules. A cytologic possibility of adenomatoid odontogenic tumor was suggested. Histopathology, however, confirmed it to be an ameloblastic fibroma. 相似文献
47.
A human recessive neurosensory nonsyndromic hearing impairment locus is a potential homologue of the murine deafness (dn) locus 总被引:1,自引:1,他引:1
Jain Pawan K.; Fukushima Kunihiro; Deshmukh Dilip; Ramesh Arabandi; Thomas Elizabeth; Lalwani Anil K.; Kumar Subrinder; Ploplis Barbara; Skarka Hana; Srisailapathy C.R.Srikumari; Wayne Sigrid; Zbar Ross I.S.; Verma Ishwar C.; Smith Richard J.H.; Wilcox Edward R. 《Human molecular genetics》1995,4(12):2391-2394
A locus for recessive neurosensory nonsyndromic hearing impairmentmaps to chromosome 9q13q21 in two regionally separateconsanguineous families from India. Each family demonstratesa LOD score greater than 4.5 to this region. D9S15, tightlylinked to the Friedreich's ataxia locus, a region that has beendefined with over 1 Mb of YAC contig information and severalexpressed sequences, is one of the flanking markers. In mice,the deafness (dn) locus maps to mouse chromosome 19 and flankingloci are syntenic to human chromosome 9q11q21. The dnmouse is a potential model for the hearing impairment foundin both these families. 相似文献
48.
In vitro gene expression strategy was used for the production of polyclonal antiserum to the nucleocapsid protein (NP) of Groundnut bud necrosis virus (GBNV). The GBNV NP gene from cowpea isolate was cloned into 6x His-tagged UA cloning vector and expressed in Escherichia coli [M15] cells. The fusion protein was detected in insoluble fraction and was purified by using Ni-NTA agarose resin. The purified 6x His-fusion protein (32 kDa) was used for immunisation to produce a high titre polyclonal antiserum. The antiserum to the NP of GBNV at 1:4000 dilution detected successfully natural infection of GBNV and Watermelon bud necrosis virus in a wide range of cucurbitaceous, leguminous and solanaceous hosts from different locations. 相似文献
49.
Jhingan HP Jain R Desai NG Vaswani M Tripathi BM Pandey RM 《Indian journal of medical sciences》2002,56(10):495-500
Self-report validity of recent drug use among heroin abusers depends on many factors including the population being studied and the setting in which the study is carried out. This study was conducted by the treating physicians to assess the self-report validity of recent heroin use by heroin dependent patients in the outdoor setting using 'thin layer chromatography' (TLC) and two highly sensitive methods of urinalysis viz. 'gas liquid chromatography' (GLC) and 'high performance liquid chromatography' (HPLC). Out of seventy-six heroin dependent patients who entered the study, 64 provided urine sample on the same day. Patients' self-report about recent opiate use was found to have a moderate agreement with urinalysis report. However, it is important to validate it with urinalysis during the treatment process because a substantial proportion of patients fails to report recent opiate use. It is recommended that all drug dependence treatment centres should be equipped with a sensitive urinalysis facility. Otherwise, the outcome of the treatment process should be considered with caution. 相似文献
50.