全文获取类型
收费全文 | 686篇 |
免费 | 0篇 |
专业分类
化学工业 | 4篇 |
轻工业 | 6篇 |
无线电 | 3篇 |
冶金工业 | 673篇 |
出版年
2008年 | 1篇 |
2005年 | 1篇 |
2004年 | 2篇 |
2003年 | 2篇 |
1999年 | 19篇 |
1998年 | 207篇 |
1997年 | 120篇 |
1996年 | 85篇 |
1995年 | 49篇 |
1994年 | 42篇 |
1993年 | 39篇 |
1992年 | 5篇 |
1991年 | 6篇 |
1990年 | 3篇 |
1989年 | 5篇 |
1988年 | 8篇 |
1987年 | 5篇 |
1986年 | 13篇 |
1985年 | 4篇 |
1983年 | 1篇 |
1982年 | 2篇 |
1981年 | 2篇 |
1980年 | 6篇 |
1979年 | 1篇 |
1978年 | 1篇 |
1977年 | 18篇 |
1976年 | 34篇 |
1972年 | 1篇 |
1968年 | 2篇 |
1966年 | 2篇 |
排序方式: 共有686条查询结果,搜索用时 0 毫秒
681.
682.
A radioimmunoassay method was utilized to determine serum cortisol (hydrocortisone) concentrations in normal dogs. The mean value was 2.32 mug/dl (minimum, 0.94; maximum, 3.70; with a coefficient of variation of 29.7%). Samples had been collected in the morning of the diurnal cycle. The cortisol antibody used was highly specific for cortisol and showed little cross reaction with other common physiologic corticosteroids, when they were assayed, using the radioimmunoassay procedure described. 相似文献
683.
684.
685.
686.
Thirty-six paired specimens of serum and ascitic fluid from 21 patients with peritonitis and ascites, most with sponetaneous bacterial peritonitis and alcoholic cirrhosis, were assayed for antibiotic content. Antibiotics assayed and number of determinations were gentamicin, 14; tobramycin, 7; ampicillin, 5; clindamycin, 3; penicillin G, 2; cephalothin, 2; chloramphenico, 2; and cefazolin, 1. In 31 pared specimens the ascitic fluid antibiotic concentration was about one half or more of the simultaneous serum level and in 17 assays exceeded 90% of the serum level. All antibiotics studied penetrated ascitic fluid equally well. Clinical response to antibiotic therapy was good in 12 of 16 patients with culture-proven bacterial peritonitis. Antibiotic levels in ascitic fluid exceeded the minimal inhibitory concentration of the infecting organisms in all but one patient who responded. Direct intraperitoneal instillation of antibiotics does not appear to be necessary routinely; however, there may be an initial lag of several hours before antibiotic concentrations is ascites achieve therapeutic levels. 相似文献