全文获取类型
收费全文 | 1219篇 |
免费 | 57篇 |
国内免费 | 3篇 |
专业分类
耳鼻咽喉 | 19篇 |
儿科学 | 25篇 |
妇产科学 | 26篇 |
基础医学 | 173篇 |
口腔科学 | 20篇 |
临床医学 | 116篇 |
内科学 | 293篇 |
皮肤病学 | 56篇 |
神经病学 | 82篇 |
特种医学 | 14篇 |
外科学 | 141篇 |
综合类 | 3篇 |
预防医学 | 52篇 |
眼科学 | 18篇 |
药学 | 100篇 |
中国医学 | 7篇 |
肿瘤学 | 134篇 |
出版年
2021年 | 8篇 |
2020年 | 9篇 |
2018年 | 8篇 |
2017年 | 17篇 |
2016年 | 8篇 |
2015年 | 13篇 |
2014年 | 17篇 |
2013年 | 22篇 |
2012年 | 33篇 |
2011年 | 45篇 |
2010年 | 30篇 |
2009年 | 30篇 |
2008年 | 52篇 |
2007年 | 62篇 |
2006年 | 64篇 |
2005年 | 66篇 |
2004年 | 74篇 |
2003年 | 94篇 |
2002年 | 81篇 |
2001年 | 41篇 |
2000年 | 33篇 |
1999年 | 33篇 |
1998年 | 23篇 |
1997年 | 12篇 |
1996年 | 14篇 |
1995年 | 9篇 |
1994年 | 20篇 |
1993年 | 18篇 |
1992年 | 27篇 |
1991年 | 19篇 |
1990年 | 24篇 |
1989年 | 17篇 |
1988年 | 18篇 |
1987年 | 20篇 |
1986年 | 12篇 |
1985年 | 16篇 |
1984年 | 13篇 |
1983年 | 13篇 |
1982年 | 9篇 |
1981年 | 14篇 |
1980年 | 12篇 |
1979年 | 13篇 |
1978年 | 15篇 |
1977年 | 12篇 |
1976年 | 13篇 |
1975年 | 8篇 |
1971年 | 8篇 |
1969年 | 8篇 |
1968年 | 11篇 |
1967年 | 9篇 |
排序方式: 共有1279条查询结果,搜索用时 15 毫秒
1.
Setsuko Ito 《Arerugī》2006,55(12):1491-1496
2.
3.
Progress in understanding carcinogenesis has shown cancer to be a disease caused by gene abnormalities, and a variety of oncogenes
and tumor suppressor genes have thus been identified. Advances in molecular biology have given us new tools for diagnosing,
staging and predicting the outcome for cancer patients and gene therapy could therefore potentially revolutionize the treatment
of gastrointestinal (GI) tract cancer. Progress has been made in several approaches related to genetic modification: (1) antisense
oncogene and the restoration of tumor suppresor gene therapy; (2) suicide gene therapy; and (3) cancer immunotherapy. In situ
in vivo gene transfer is a practical method of gene therapy for GI tract cancer. Although many hurdles need to be overcome
to achieve effective gene transfer and targeting, our early results of in situ in vivo suicide gene therapy for canine gastric
cancer are promising. The era of combined treatment consisting of surgery and molecular surgery for GI tract cancer is thus
considered to soon be possible. 相似文献
4.
An evaluation of the residual activity of quick-drying agents (alcoholic solutions) used for hygienic hand disinfection is described. We looked for residual efficacy following hand disinfection with soap and water alone or followed by one of two alcoholic handrub lotions supplied from an automatic hand washing machine. The bacterial counts on the hands obtained before and within 2 successive hours after disinfection showed that alcoholic chlorhexidine was the most effective for 10 minutes after contamination of the hands. WELPAS® (alcoholic chlorbenzarconium) followed this in its immediate effect and was better than soap and water alone. There were no significant differences after 30‘ or 120‘ between the three disinfecting methods. 相似文献
5.
In a plantar cyst composed of the wall of the squamous cell layer and the horny inner substance in the lower dermis, we found characteristic pathological changes, such as cytoplasmic eosinophilic inclusions and vacuolated structure, and, immunohistochemically, the papillomavirus capsid antigen. The human papillomavirus (HPV) DNA cloned from the cyst showed no homology with other known prototypes of HPV (HPV 1 through HPV 59) by Southern blot analysis under stringent conditions and was named as HPV 60. HPV 60 DNA was found in three other cases of plantar cyst with the identical pathological changes, but not in a plantar cyst without such changes. The results suggest that HPV 60 has unique biological properties to induce a plantar cyst as a distinct type of cutaneous HPV. 相似文献
6.
Hiroyoshi Matsukura M.D. Akira Higuchi M.D. Yoshifumi Suzuki M.D. Toshio Okada M.D. 《Pediatrics international》1987,29(2):277-279
A patient presenting with osteomyelitis of the pelvis is described. In this case it was difficult to establish a correct diagnosis by use of scintigraphic scanning, in spite of clear roentgenographic evidence of osteomyelitis. 相似文献
7.
T Kiyama M Onda A Tokunaga I Fujita T Okuda T Mizutani T Yoshiyuki Y Shimizu K Nishi N Matsukura 《Gastroenterologia Japonica》1992,27(4):459-465
Seven human gastric cancer xenografts with different concentrations of EGF receptor were established in nude mice. The expression of EGF receptor in the tumors was demonstrated by Western blotting with anti-EGF receptor antibody, binding assay with 125I-EGF and immunohistochemistry with anti-EGF receptor antibody. Western blotting revealed EGF receptor doublet bands at molecular masses of 150 KDa and 170 KDa in all of the samples. The concentration of 125I-EGF binding activity in the tumors ranged from 36.0 to 11,000 fmol/mg protein, with a mean of 345 fmol/mg protein. EGF receptor was also demonstrated immunohistochemically on the apical border of the glands and the cell membrane of the tumor cells. There seemed to be a close correlation between the concentration of 125I-EGF binding activity and the doubling time of these tumors in nude mice (gamma = -0.68). However, no definite correlation was observed between EGF ligand binding and histological features of intestinal type or diffuse type. The expression of EGF receptor appears to facilitate the growth of human gastric cancer xenografts in nude mice. 相似文献
8.
Bi X Gatanaga H Tanaka M Honda M Ida S Kimura S Oka S 《Journal of acquired immune deficiency syndromes (1999)》2005,38(1):1-4
The Dynabeads method showed the potential for enumerating CD4 T lymphocytes (CD4 count) in HIV-1-infected individuals. The large volume of Dynabeads required for 1 sample and complex procedure made the method expensive and not easy for use, however. To decrease the cost and simplify the procedure, we reduced the volume of the Dynabeads, added wash times, and skipped over the staining step so as to count the CD4 cells directly under an optical microscope. The CD4 count of 246 blood samples using our modified Dynabeads method (DynabeadsCD4) showed a significant correlation with that obtained by flow cytometry (FlowcytoCD4) (r = 0.91 [P < 0.0001]; slope = 1.03, intercept = -16). The sensitivity and specificity for a CD4 count less than 200 cells/microL were 79% and 94%, and for a CD4 count less than 350 cells/microL, the sensitivity and specificity were 95% and 88%, respectively. The positive and negative predictive values for a CD4 count less than 350 cells/microL were 97% and 83%, respectively. The systematic error was 8 cells/microL (95% confidence interval [CI]: 0.4-16). The cost of Dynabeads for 1 sample was less than $1.00; thus, the estimated cost per DynabeadsCD4 test is less than $3.00, including the cost of other disposable materials. Our modified method is simple, economic, and accurate enough to monitor antiretroviral therapy in resource-limited situations. 相似文献
9.
10.
Growth of Bacteroides fragilis in Rabbit Tracheal Organ Culture: Anaerobiosis and Tissue Respiration 下载免费PDF全文
Tsukasa Murakami Tohey Matsuyama Setsuko Shiraishi Bunji Hagihara 《Infection and immunity》1981,34(3):1062-1064
Rabbit tracheal explants supporting growth of inoculated Bacteroides fragilis in air were shown to keep low oxygen tension. Treating the explants with sodium azide induced high oxygen tension and arrested reversibly the growth of B. fragilis. 相似文献