全文获取类型
收费全文 | 2905篇 |
免费 | 177篇 |
国内免费 | 15篇 |
专业分类
耳鼻咽喉 | 73篇 |
儿科学 | 33篇 |
妇产科学 | 59篇 |
基础医学 | 298篇 |
口腔科学 | 50篇 |
临床医学 | 232篇 |
内科学 | 865篇 |
皮肤病学 | 39篇 |
神经病学 | 123篇 |
特种医学 | 99篇 |
外科学 | 540篇 |
综合类 | 18篇 |
预防医学 | 78篇 |
眼科学 | 13篇 |
药学 | 175篇 |
中国医学 | 7篇 |
肿瘤学 | 395篇 |
出版年
2023年 | 32篇 |
2022年 | 48篇 |
2021年 | 80篇 |
2020年 | 41篇 |
2019年 | 49篇 |
2018年 | 82篇 |
2017年 | 49篇 |
2016年 | 81篇 |
2015年 | 69篇 |
2014年 | 81篇 |
2013年 | 82篇 |
2012年 | 189篇 |
2011年 | 178篇 |
2010年 | 115篇 |
2009年 | 87篇 |
2008年 | 155篇 |
2007年 | 139篇 |
2006年 | 115篇 |
2005年 | 119篇 |
2004年 | 125篇 |
2003年 | 121篇 |
2002年 | 148篇 |
2001年 | 64篇 |
2000年 | 70篇 |
1999年 | 90篇 |
1998年 | 36篇 |
1997年 | 35篇 |
1996年 | 24篇 |
1995年 | 21篇 |
1994年 | 17篇 |
1993年 | 13篇 |
1992年 | 70篇 |
1991年 | 58篇 |
1990年 | 56篇 |
1989年 | 38篇 |
1988年 | 39篇 |
1987年 | 33篇 |
1986年 | 43篇 |
1985年 | 34篇 |
1984年 | 27篇 |
1983年 | 17篇 |
1982年 | 8篇 |
1981年 | 16篇 |
1980年 | 11篇 |
1979年 | 15篇 |
1978年 | 10篇 |
1977年 | 12篇 |
1975年 | 6篇 |
1970年 | 5篇 |
1969年 | 12篇 |
排序方式: 共有3097条查询结果,搜索用时 15 毫秒
11.
We develop a compact scanning head for use in laser confocal fluorescence microscopy for in situ fluorescence imaging of organs. The head, cylindrical in shape, has 3.5 mm diameter and 30 mm length, and is thus small enough to operate in a living rat heart. The lateral and axial resolutions, defined as full widths at half maximum (FWHM) of a point spread function (PSF), measures 1.0 and 5.0 microm, respectively, for 488-nm excitation and 1.0 and 5.4 microm, respectively, for 543-nm excitation. The chromatic aberration between 488- and 543-nm laser beams is well suppressed. We perform Ca2+ imaging in cardiomyocytes through the right ventricular chamber of a perfused rat heart in line-scan mode with 2.9-ms time resolution. We also carried out two-color imaging of a fixed mouse heart and liver with subcellular resolution. The compact head of the microscope equipped with a line-scan imaging mode and two-color imaging mode is useful for in situ imaging in living organs with subcellular resolution and can advantageously be applied to in vivo research. 相似文献
12.
Lee MH Gordon D Ott J Lu K Ose L Miettinen T Gylling H Stalenhoef AF Pandya A Hidaka H Brewer B Kojima H Sakuma N Pegoraro R Salen G Patel SB 《European journal of human genetics : EJHG》2001,9(5):375-384
Sitosterolaemia (also known as phytosterolaemia, MIM 210250) is a rare recessive autosomal inherited disorder, characterised by the presence of tendon and tuberous xanthomas, accelerated atherosclerosis and premature coronary artery disease. The defective gene is hypothesised to play an important role in regulating dietary sterol absorption and biliary secretion, thus defining a molecular mechanism whereby this physiological process is carried out. The disease locus was localised previously to chromosome 2p21, in a 15 cM interval between microsatellite markers D2S1788 and D2S1352 (based upon 10 families, maximum lodscore 4.49). In this study, we have extended these studies to include 30 families assembled from around the world. A maximum multipoint lodscore of 11.49 was obtained for marker D2S2998. Homozygosity and haplotype sharing was identified in probands from non-consanguineous marriages from a number of families, strongly supporting the existence of a founder effect among various populations. Additionally, based upon both genealogies, as well as genotyping, two Amish/Mennonite families, that were previously thought not to be related, appear to indicate a founder effect in this population as well. Using both homozygosity mapping, as well as informative recombination events, the sitosterolaemia gene is located at a region defined by markers D2S2294 and Afm210xe9, a distance of less than 2 cM. 相似文献
13.
T Kaneda H Tamaki Y Hidaka N Amino N Mitsuda O Tanizawa K Miyai 《Rinsho byori. The Japanese journal of clinical pathology》1992,40(9):941-947
Thyrotoxicosis in Graves' disease is often aggravated in early pregnancy and this aggravation is associated with postpartum relapse of thyrotoxicosis. To examine whether thyroid-stimulating TSH receptor antibody (TSAb) or human chorionic gonadotropin (hCG), which also has thyroid-stimulating activity (TSA), is responsible for this early aggravation, the respective TSA due to TSAb or hCG were evaluated with a sensitive cAMP accumulation assay using FRTL-5 cells. TSA, which was detectable in all of 11 women in normal early pregnancy, correlated positively with serum hCG level, but was abolished completely by the pretreatment of serum samples with the solid-phase hCG antibody coupled with Sepharose-4B. Total TSA in the model samples of mixture of Graves' and pregnant sera (Gr + Preg), was reduced by the pretreatment with the solid-phase antibody, just corresponding with the reduction in hCG-induced TSA. Total TSA in early pregnant sera in 15 patients with Graves' disease, decreased significantly but was still positive even by the pretreatment with the hCG antibody. Pregnancy-associated changes in TSA was examined serially in a patient with Graves' disease, and hCG-induced TSA increased predominantly along with the serum thyroid hormone in early aggravation period. These data indicate that (1) the respective TSA due to TSAb or hCG can be differentially measured by using the solid-phase hCG antibody and (2) hCG plays an important role for aggravation of Graves' thyrotoxicosis in early pregnancy. 相似文献
14.
Shimaoka Y Hidaka Y Tada H Takeoka K Morimoto Y Amino N 《American journal of reproductive immunology (New York, N.Y. : 1989)》2001,45(2):100-102
PROBLEM: Recently, we reported increases in the production of interferon-gamma (IFN-gamma), interleukin-2 (IL-2), and IL-4 during the postpartum period. The present study was undertaken to investigate whether these increases might be explained by increased prolactin while breast-feeding. METHOD: Whole blood from 41 women who were breast-feeding, 13 women not breast-feeding, and 31 healthy non-pregnant women was stimulated with phorbol 12-myristate 13-acetate and ionomycin, and the levels of cytokines in the supernatant were measured by enzyme-linked immunosorbent assay. Their serum levels of prolactin were measured by enzyme immunoassay. RESULTS: Increases in IFN-gamma, IL-2, IL-4, and IL-10 production were observed in women who were breast-feeding but not in women who were not breast-feeding. Serum levels of prolactin correlated with the levels of IFN-gamma in culture supernatant. CONCLUSIONS: These results suggest that breast-feeding induces production of cytokines and that IFN-gamma production is enhanced by physiological concentrations of prolactin. 相似文献
15.
Tetsuya Murata Shigeo Nakamura Hiroya Kato Yasushi Yatabe Taizo Shiraishi Makoto Kuroda Ryulchi Yatani Taizan Suchi 《Pathology international》1997,47(11):801-805
A case of Hodgkln's disease (HD), lymphocyte depression (LD) type In an Immunosuppressive patient is described. The patient was a 48-year-old male and his parents were born In the Kyushu area, which is an endemic area for adult T cell lymphomaheukemla (ATL). He was seropositive for ATL virus (ATLV, also referred to as HTLV-I) and showed a marked Immunosuppressive condition. He developed LD-HD and Pneumocystis carinii pneumonia, and died due to respiratory failure. The Immunohistochemical and in situ hybridization analyses revealed that the Reed-Sternberglike cells In the lymph node biopsy sample were positive for Ber-H2 (CD30), Leu-M1 (CD15), L-26 (CD20), Bcl-2, p53 and EBER, the viral genome of Epstein-Barr virus (EBV). 相似文献
16.
Fumiyuki Yamasaki Yoshinori Kajiwara Seiji Hama Taro Murakami Toshikazu Hidaka Taiichi Saito Hiroyuki Yoshioka Kazuhiko Sugiyama Kazunori Arita Kaoru Kurisu 《Pathobiology》2007,74(1):22-31
OBJECTIVE: To investigate the mechanism of staurosporine-induced glioma cell death and cell cycle arrest using adenovirus-mediated gene transfection, as well as the function of retinoblastoma (Rb) and genetic instability induced by staurosporine. METHODS: Cell cycle regulation, cell death and nuclear abnormalities induced by staurosporine were examined using an adenovirus vector expressing Rb, p16 or p21 genes in human glioma cell lines. RESULTS: The Rb-defective SF-539 cell line was resistant to staurosporine compared with cell lines expressing intact Rb. SF-539 glioma cells exposed to staurosporine became multinucleated and then died. Multinucleation was prevented in SF-539 cells transfected with the Rb gene, thus decreasing the death rate of these cells. CONCLUSIONS: These results imply that enforced Rb expression protects cells from genomic instability induced by staurosporine regardless of its upstream molecular effects. 相似文献
17.
Involvement of Rho-kinase in inflammatory and neuropathic pain through phosphorylation of myristoylated alanine-rich C-kinase substrate (MARCKS) 总被引:2,自引:0,他引:2
Tatsumi S Mabuchi T Katano T Matsumura S Abe T Hidaka H Suzuki M Sasaki Y Minami T Ito S 《Neuroscience》2005,131(2):491-498
Myristoylated alanine-rich C-kinase substrate (MARCKS) is a major in vivo substrate for protein kinase C in the brain and has been implicated in cellular processes associated with cytoskeletal restructuring such as synaptic trafficking and neurotransmitter release. A phosphorylation-site specific antibody against Ser159-phospho-MARCKS (pS159-Mar-Ab) revealed that MARCKS is phosphorylated at Ser159 by Rho-kinase and that its phosphorylation is inhibited by the Rho-kinase specific inhibitor H-1152. Since the function of MARCKS is regulated by phosphorylation at multiple sites, here we examined the involvement of Rho-kinase in relation to phosphorylation of MARCKS at Ser159 in inflammatory and neuropathic pain by H-1152. When intrathecally administered 10 min before s.c. injection of formalin, H-1152 at 10 and 100 ng attenuated the second-phase, but not the first-phase, pain-like behaviors in the formalin test. Neuropathic pain induced by selective L5 spinal nerve transection was also relieved by intrathecal injection of H-1152. Nitric oxide synthase activity visualized by NADPH diaphorase histochemistry increased in the superficial layer of the spinal cord 30 min after formalin injection and 7 days after nerve transection, which were blocked by H-1152. Phosphorylation of MARCKS at Ser159 was detected in the spinal cord by pS159-Mar-Ab and the level of phosphorylation increased in the superficial layer after nerve transection. In contrast, immunoreactivities of neuronal nitric oxide synthase and MARCKS did not change significantly in the spinal cord before and after nerve transection. Taken together, the present study demonstrates that Rho-kinase is involved in inflammatory pain and the maintenance of neuropathic pain through phosphorylation of MARCKS at Ser159. 相似文献
18.
Hideo Hidaka Ryo Tatsukawa 《Archives of environmental contamination and toxicology》1985,14(5):565-571
The avoidance behavior of fish is a sensitive indicator to aquatic contaminants such as surfactants, pesticides, and residual chlorine. This paper describes an avoidance test with special reference to monochloramine by medaka (killifish,Oryzias latipes) in a small modular chamber system with a symmetrical parallel-flow. The significant avoidance concentration (P = 0.05) was 5.7 g/L as combined residual chlorine, which is the lowest among the residual chlorine avoidance concentrations reported in the literature. The avoidance curves of medaka to monochloramine exhibited a similar pattern to those of anionic surfactants. 相似文献
19.
Takahashi Toshinari Beppu Takanobu Hidaka Yuji Hosoya Tatsuo 《Clinical and experimental nephrology》2021,25(12):1336-1345
Clinical and Experimental Nephrology - Dotinurad is a selective urate reabsorption inhibitor (SURI), which selectively inhibits URAT1 to lower serum uric acid levels in patients with hyperuricemia.... 相似文献
20.
The present study was designed to examine the usefulness of 2,3-dimercaptosuccinic acid (DMSA) for the purpose of reducing cis-diamminedichloroplatinum (DDP)-induced nephrotoxicity and effective clinical use of DDP and safe. The effectiveness of DMSA on the DDP-excretion in rat kidney was observed by measuring the platinum concentration using Atomic Absorption Instrument. Co-administration of DMSA (1.0 or 2.0 mmol/kg) 1 hour after DDP injection (20 mumol/kg) showed more decrease in the platinum concentration than that immediately after DDP injection. The alleviating effect of DMSA on DDP toxicity was evaluated by lipid peroxidation, enzymatic antioxidants, and glutathione levels. The administration of DDP alone caused a significant increase in lipid peroxidation and significant decreases in enzymatic antioxidants and glutathione levels in the kidney. Co-administration of DMSA (2.0 mmol/kg) 1 hour after DDP injection showed the most effective reduction of these enzymatic damages caused by DDP. These findings suggested that the co-administration of DMSA (2.0 mmol/kg) 1 hour after DDP injection leads DDP to effective excrete from renal tissue and suppresses the lipid peroxide reaction and results in reduction of nephrotoxicity. 相似文献