全文获取类型
收费全文 | 2214篇 |
免费 | 1篇 |
专业分类
电工技术 | 1篇 |
化学工业 | 21篇 |
金属工艺 | 4篇 |
机械仪表 | 7篇 |
建筑科学 | 6篇 |
能源动力 | 2篇 |
轻工业 | 29篇 |
水利工程 | 2篇 |
石油天然气 | 5篇 |
无线电 | 9篇 |
一般工业技术 | 23篇 |
冶金工业 | 2073篇 |
原子能技术 | 24篇 |
自动化技术 | 9篇 |
出版年
2021年 | 2篇 |
2020年 | 5篇 |
2018年 | 2篇 |
2017年 | 2篇 |
2015年 | 3篇 |
2013年 | 7篇 |
2012年 | 3篇 |
2011年 | 8篇 |
2010年 | 7篇 |
2009年 | 3篇 |
2008年 | 6篇 |
2007年 | 6篇 |
2006年 | 8篇 |
2005年 | 6篇 |
2004年 | 2篇 |
2003年 | 10篇 |
2002年 | 4篇 |
2001年 | 4篇 |
2000年 | 5篇 |
1999年 | 60篇 |
1998年 | 634篇 |
1997年 | 374篇 |
1996年 | 220篇 |
1995年 | 151篇 |
1994年 | 108篇 |
1993年 | 135篇 |
1992年 | 21篇 |
1991年 | 34篇 |
1990年 | 29篇 |
1989年 | 32篇 |
1988年 | 30篇 |
1987年 | 24篇 |
1986年 | 24篇 |
1985年 | 26篇 |
1984年 | 3篇 |
1983年 | 2篇 |
1982年 | 11篇 |
1981年 | 18篇 |
1980年 | 21篇 |
1978年 | 9篇 |
1977年 | 52篇 |
1976年 | 87篇 |
1975年 | 2篇 |
1974年 | 1篇 |
1973年 | 1篇 |
1972年 | 2篇 |
1971年 | 2篇 |
1970年 | 2篇 |
1969年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有2215条查询结果,搜索用时 218 毫秒
131.
OBJECTIVE: To formulate the fundamental structure of caring as lived by Critical Care Nurses. DESIGN: Colaizzi's phenomenological research method and Diekelmann's dialogue technique were applied. SETTING: The home of each nurse constituted the setting for the interview. The nurses were employed in critical care units in six large metropolitan hospitals in the Southwest. SAMPLE: The availability sample consisted of 15 female critical care registered nurses. The nurses' mean age was 35 years. The mean number of years in critical care nursing was 4.7. One nurse was Asian, one was Hispanic, and 13 were Caucasian. RESULTS: Caring was composed of affective, cognitive, action, and outcome subprocesses. The caring process originated in the nurse's feelings and knowledge, and moved the nurse to competent actions that contributed to patient, family, and nurse outcomes. CONCLUSIONS: Understanding of the process of caring was strengthened by the findings. The decision process used by nurses would benefit from further examination for the presence of the affective and nurse outcome subprocesses. 相似文献
132.
133.
134.
135.
136.
137.
Noncompliance with medication is common, particularly in asymptomatic conditions such as hypertension that require long-term treatment, and is often unsuspected. We describe two patients with refractory hypertension in whom noncompliance was confirmed by a precipitous fall in blood pressure when antihypertensive medications were given under direct supervision. 相似文献
138.
139.
Replication protein A (RPA) is a trimeric single-stranded DNA-binding protein complex involved in DNA replication, repair, and recombination. DNA damage induces phosphorylation of the RPA p34 subunit, and it has been speculated that this phosphorylation could contribute to the regulation of the DNA damage-induced S-phase checkpoint. To further examine this potential relationship, human cell lines expressing ataxia telangiectasia (AT)-mutated dominant-negative fragments, which fail to arrest in S phase in response to ionizing radiation (IR), and AT cells expressing AT-mutated-complementing fragments, which regain the ability to arrest replicative DNA synthesis in response to IR, were analyzed for radiation-induced RPA phosphorylation. Results from these studies demonstrate that IR-induced RPA phosphorylation can be uncoupled from the S-phase checkpoint, suggesting that RPA phosphorylation in response to IR is neither necessary nor sufficient for an S-phase arrest. 相似文献
140.