全文获取类型
收费全文 | 15081篇 |
免费 | 721篇 |
国内免费 | 115篇 |
学科分类
医药卫生 | 15917篇 |
出版年
2023年 | 124篇 |
2022年 | 271篇 |
2021年 | 403篇 |
2020年 | 178篇 |
2019年 | 268篇 |
2018年 | 358篇 |
2017年 | 297篇 |
2016年 | 357篇 |
2015年 | 353篇 |
2014年 | 398篇 |
2013年 | 467篇 |
2012年 | 794篇 |
2011年 | 926篇 |
2010年 | 542篇 |
2009年 | 417篇 |
2008年 | 723篇 |
2007年 | 762篇 |
2006年 | 763篇 |
2005年 | 727篇 |
2004年 | 696篇 |
2003年 | 652篇 |
2002年 | 659篇 |
2001年 | 430篇 |
2000年 | 362篇 |
1999年 | 367篇 |
1998年 | 158篇 |
1997年 | 125篇 |
1996年 | 128篇 |
1995年 | 88篇 |
1994年 | 86篇 |
1993年 | 95篇 |
1992年 | 279篇 |
1991年 | 220篇 |
1990年 | 193篇 |
1989年 | 221篇 |
1988年 | 193篇 |
1987年 | 225篇 |
1986年 | 189篇 |
1985年 | 183篇 |
1984年 | 132篇 |
1983年 | 113篇 |
1979年 | 118篇 |
1978年 | 60篇 |
1975年 | 57篇 |
1974年 | 68篇 |
1972年 | 55篇 |
1970年 | 73篇 |
1969年 | 53篇 |
1968年 | 64篇 |
1967年 | 61篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
Hideki Kawaguchi Kazuko Masuo Tomohiro Katsuya Ken Sugimoto Hiromi Rakugi Toshio Ogihara Michael L Tuck 《Hypertension research》2006,29(12):951-959
High blood pressure (BP) is a major determinant of cardiovascular events in obesity. The beta2- and beta3-adrenoceptor polymorphisms are associated with obesity and hypertension. In the present study, we examine the relationships of beta2- and beta3-adrenoceptor polymorphisms with further weight gain-induced BP elevation in obese subjects. Changes in BP, body weight, total body fat-mass, waist-to-hip ratio, plasma norepinephrine (NE) and leptin levels, and beta2(Arg16Gly)- and beta3(Trp64Arg)-adrenoceptor polymorphisms were measured periodically over a 5-year period in 55 entry obese (body mass index [BMI]> or =25.0 kg/m(2)) normotensive (BP<140/90 mmHg) men. BP elevation and weight gain were defined as > or =10% increases from entry levels over 5 years in mean BP or BMI. Obese subjects with weight gain, BP elevation or weight gain-induced BP elevation had higher frequencies of the Gly16 allele of Arg16GIy and Arg64 allele of Trp64Arg. Subjects carrying the Gly16 or Arg64 alleles had significantly greater total fat-mass and waist-to-hip ratio at entry and over a 5-year period compared to the subjects who did not carry these polymorphisms. Subjects carrying the Gly16 allele had similar levels of plasma NE, higher levels of plasma leptin and a lower slope of the regression lines between plasma leptin and NE levels. Those carrying the Arg64 allele had higher plasma NE levels at entry and over a 5-year period compared to the subjects without the Arg64 allele, but plasma leptin levels and slopes were similar. The findings demonstrate that the Arg64 allele of the beta3-adrenoceptor polymorphisms relates to weight gain-induced BP elevation accompanying high plasma NE (heightened sympathetic activity) in obese men. The Gly16 allele of the beta2-adrenoceptor polymorphisms links to weight gain-induced BP elevation associated with leptin resistance. beta2- and beta3-adrenoceptor polymorphisms could predict the future BP elevation and further weight gain-induced BP elevation in originally obese subjects. 相似文献
4.
5.
A case of Ullrich disease was presented. The patient was a 3-year-old girl with torticollis, generalized muscle weakness and acroatonia since birth. High-arched palate, protruded calcaneus, and mild contracture of proximal joints were also recognized. Intellectual development was normal. Serum level of CPK was slightly increased. In histological and histochemical examinations of quadriceps femoris muscle, proliferated connective tissue, marked variation in the muscle fiber diameter, and a lot of degenerated and regenerated fibers were recognized. Minimal injury easily causes subcutaneous hemorrhage, but no abnormality was found in the structure of collagen. 相似文献
6.
7.
Madoka Minoguchi Nobuyuki Yanagawa Chisato Ishikawa Junpei Sasajima Mitsuru Goto Miho Okamoto Yoshinori Saito Masanori Murakami Yutaka Orii Toru Yaosaka 《Nihon Shokakibyo Gakkai zasshi》2007,104(7):1082-1087
Pancreatic metastasis of malignant melanoma is rarely diagnosed while the patient is alive. We report a case of metastatic melanoma of the pancreas in a 35-year-old woman presenting with a solid mass of the pancreas. Her past medical history included a radical hysterectomy 2 years previously for malignant melanoma of the vagina. Twelve months later, lung metastasis was also resected. EUS-guided fine needle aspiration (EUS-FNA) identified that the pancreatic tumor was histologically and immunohistochemically identical to the surgical specimen of her lung neoplasm. Imaging studies including US, CT, and MRI have limited value to distinguish the tumors from primary ductal adenocarcinoma. EUS-FNA can provide tissue diagnosis from pancreatic masses, specifically when other modalities have failed. 相似文献
8.
9.
10.