全文获取类型
收费全文 | 3077篇 |
免费 | 174篇 |
国内免费 | 24篇 |
专业分类
耳鼻咽喉 | 29篇 |
儿科学 | 24篇 |
妇产科学 | 37篇 |
基础医学 | 359篇 |
口腔科学 | 109篇 |
临床医学 | 196篇 |
内科学 | 1055篇 |
皮肤病学 | 33篇 |
神经病学 | 194篇 |
特种医学 | 62篇 |
外科学 | 598篇 |
综合类 | 11篇 |
预防医学 | 72篇 |
眼科学 | 56篇 |
药学 | 151篇 |
中国医学 | 1篇 |
肿瘤学 | 288篇 |
出版年
2023年 | 13篇 |
2022年 | 28篇 |
2021年 | 38篇 |
2020年 | 27篇 |
2019年 | 44篇 |
2018年 | 59篇 |
2017年 | 42篇 |
2016年 | 52篇 |
2015年 | 47篇 |
2014年 | 60篇 |
2013年 | 77篇 |
2012年 | 137篇 |
2011年 | 133篇 |
2010年 | 66篇 |
2009年 | 72篇 |
2008年 | 122篇 |
2007年 | 152篇 |
2006年 | 150篇 |
2005年 | 174篇 |
2004年 | 159篇 |
2003年 | 159篇 |
2002年 | 174篇 |
2001年 | 82篇 |
2000年 | 99篇 |
1999年 | 95篇 |
1998年 | 56篇 |
1997年 | 41篇 |
1996年 | 32篇 |
1995年 | 24篇 |
1994年 | 17篇 |
1993年 | 23篇 |
1992年 | 90篇 |
1991年 | 73篇 |
1990年 | 70篇 |
1989年 | 53篇 |
1988年 | 57篇 |
1987年 | 48篇 |
1986年 | 56篇 |
1985年 | 56篇 |
1984年 | 42篇 |
1983年 | 33篇 |
1982年 | 17篇 |
1981年 | 30篇 |
1979年 | 36篇 |
1978年 | 12篇 |
1977年 | 13篇 |
1974年 | 13篇 |
1971年 | 12篇 |
1968年 | 15篇 |
1966年 | 11篇 |
排序方式: 共有3275条查询结果,搜索用时 15 毫秒
51.
Tarumi K Yagihashi A Tsuruma T Koide S Sasaki K Hirata K 《Transplantation proceedings》1999,31(1-2):878-881
52.
Gene therapy for renal anemia in mice with polycystic kidney using an adenovirus vector encoding the human erythropoietin gene 总被引:2,自引:0,他引:2
Osada S Ebihara I Setoguchi Y Takahashi H Tomino Y Koide H 《Kidney international》1999,55(4):1234-1240
BACKGROUND: Recombinant human erythropoietin (rHuEPO) is primarily used for patients with anemia associated with end-stage renal disease. We evaluated the efficacy of EPO gene therapy using adenovirus vector for chronic renal failure mice expressing severe renal anemia. METHODS: Recombinant HuEPO gene transfer to mesothelial cells was performed in vitro and in vivo. Recombinant replication-deficient adenoviruses containing rHuEPO cDNA (AdCMVEPO), E. coli lacZ gene (AdCMVlacZ), or an nonexogenous gene (AdNull as control vector) driven by the cytomegalovirus promotor/enhancer were constructed. The oligosaccharides associated with the rHuEPO from AdCMVEPO-treated mesothelial cells were analyzed. For in vivo study, the DBA/2FG-pcy mouse, a model for human autosomal recessive polycystic kidney disease resulting in chronic renal failure with progressive anemia, was used. RESULTS: The sialylated oligosaccharides associated with the rHuEPO produced in AdCMVEPO-treated mesothelial cells occupied 78 +/- 0.7% of the total oligosaccharide pool. A single intraperitoneal administration of AdCMVEPO induced rHuEPO synthesis in the peritoneal cells and a marked increase in erythrocyte production. The maximal increase in hematocrit (43 +/- 4%) was observed on day 28, and it remained elevated for 40 days. CONCLUSION: These results indicate that intraperitoneal administration of AdCMVEPO improves renal anemia in mice with chronic renal failure and that the mesothelial cell is an appropriate target cell for gene transfer. 相似文献
53.
54.
Kamei H Koide T Kojima T Hashimoto Y Hasegawa M 《Cancer biotherapy & radiopharmaceuticals》1998,13(3):185-188
Quinones were studied for their growth inhibitory effect on cultured malignant cells. HCT-15 cells derived from human colon carcinoma were used for these experiments. Quinones used were arbutin in the benzoquinone group, juglone and lawsone in the naphthaquinone group, alizarin, emodin, 1,8-dihydroxyanthraquinone, and anthraquinone in the anthraquinone group, and xanthone. Cultured cells were incubated with various concentrations of the quinones for four days in a 5% CO2 incubator, after which cell numbers were counted and significance of differences was analyzed by Student's t test. Anthraquinones and naphthaquinones used in these experiments were more effective than the monocyclic quinone. The 50% suppression dose was less than 12.5 micrograms/ml for them. The number of OH groups seemed to play an important role in the degree of the cell growth inhibition: anthraquinones with 2 or 3 OH groups were more effective than those with no OH group like, 9,10-dioxoanthracene and xanthone. In fact, anthraquinones with no OH group and xanthone were not significantly effective. Flow cytometric histograms revealed a specific pattern; that is, lawsone and juglone in the naphthaquinone group and alizarin and 1,8-dihydroxy-anthraquinone in the anthraquinone group blocked mainly the S phase, and emodin in the anthraquinone group blocked the G1 to S phase of the cell cycle. 相似文献
55.
Hasegawa M Kawashima S Shikano M Hasegawa H Tomita M Murakami K Kushimoto H Katsumata H Toba T Yoshikawa H Yoshimura E Koide S Murase M Fujii M 《Nihon Jinzo Gakkai shi》2000,42(2):53-59
Cholesterol arterial embolization is a systemic disease resulting from cholesterol crystal embolization to multiple organs, including the kidney, skin, brain, eye, gastrointestinal tract and extremities. In general, it is associated with high morbidity and mortality, but no optimal treatment has yet been developed. In this paper, we report five patients with cholesterol atheroembolic renal failure. In three of the five patients, combined therapy with corticosteroids and plasma exchange was performed. The three patients survived. On the other hand, the two remaining patients died of multifactorial causes. In this report, the literature on steroid therapy for cholesterol atheroembolic renal disease is reviewed and the efficacy of combined therapy by use of corticosteroids and plasma exchange is evaluated. 相似文献
56.
The urinary podocyte as a marker for the differential diagnosis of idiopathic focal glomerulosclerosis and minimal-change nephrotic syndrome 总被引:7,自引:0,他引:7
Nakamura T Ushiyama C Suzuki S Hara M Shimada N Ebihara I Koide H 《American journal of nephrology》2000,20(3):175-179
BACKGROUND/AIMS: Detection of podocytes in the urine sediment of children indicates that severe podocyte injury occurred in the glomerulus. Focal glomerulosclerosis (FGS) and minimal-change nephrotic syndrome (MCNS) are kidney diseases characterized by massive proteinuria. The aim of the present study was to determine whether urinary podocytes can be detected in patients with idiopathic FGS or MCNS and whether immunosuppression therapy alters these cells. METHODS: Twenty patients with MCNS (nephrotic stage, n = 12; remission stage, n = 8), 15 patients with FGS and 20 healthy controls were included in the present study. Urinary podocytes were stained by immunofluorescence. All patients with MCNS at the nephrotic stage received prednisolone for 6 months, and all patients with FGS received some form of immunosuppression therapy including prednisolone, cyclophosphamide or mizoribine for 12 months. RESULTS: The 12 nephrotic-stage MCNS patients achieved remission after treatment. Seven of the 15 FGS patients also achieved remission, but the other 8 remained in the nephrotic stage. Urinary podocytes were not detected in any patient with MCNS nor were they detected in healthy controls. Urinary podocytes were detected in all FGS patients (mean, 4.2 cells/ml) before treatment and the number of cells decreased in the 7 patients who achieved remission. The number of podocytes was unchanged in the other 8 patients even after treatment. CONCLUSION: Urinary podocytes may be a useful diagnostic indicator for differentiation between FGS and MCNS. These cells may also mark disease progression in cases of FGS. 相似文献
57.
Nakamura T Ushiyama C Suzuki S Shimada N Sekizuka K Ebihara I Takahashi Y Tanaka A Koide H 《Nephron》2000,86(2):247
58.
59.
Koide T Kamei H Hashimoto Y Kojima T Hasegawa M 《Cancer biotherapy & radiopharmaceuticals》1996,11(4):273-277
When Balb/C mice that were fed with red glutinous rice, white ordinary rice, or commercially available standard food were inoculated with syngeneic Meth/A lymphoma cells i.p., the group fed the red rice survived longer than the other two groups. In order to determine if the anthocyanins contained in red-coloured seeds and fruit rinds were responsible for the tumor suppressive effect, we added anthocyanins extracted from grape rinds and glutinous red rice to petri dishes that had been seeded with HCT-15 cells. After 4 days of culture, cell counts were made. These anthocyanins were not effective in suppressing the tumor growth. However, anthocyanidins, which were generated by keeping anthocyanins in 5 to 6% HC1 methanol for 5 to 6 hours, were effective in the suppression of tumor growth. Flowcytometric histograms were made after 2 days of culture with these bioflavonoids. The histogram of cells treated with crude anthocyanin was similar to that of the control. Hydrolyzed anthocyanidins gave the elevation of S phase, suggesting a block in the step from S-phase to G2-phase. It seemed that the anthocyanidins contained in the grape rinds and red rice were effective on the suppression of cell growth as observed previously for anthocyanins extracted from the petals of higher plants. 相似文献
60.
Masaki Takahashi Hidekazu Kondo Keisuke Yonezu Tetsuji Shinohara Mikiko Nakagawa Naohiko Takahashi 《Internal medicine (Tokyo, Japan)》2022,61(13):1973
A 54-year-old man with early repolarization syndrome (ERS) implanted with an implantable cardioverter-defibrillator (ICD) developed persistent atrial fibrillation (AF) three years after the implantation. Similarly, the remote monitoring system begun frequently detecting ventricular fibrillation (VF) and polymorphic ventricular tachycardia (PVT). Longer RR intervals were repeatedly observed just before the initiation of PVT/VF. Catheter ablation for AF successfully diminished both the PVT and VF events. 相似文献