全文获取类型
收费全文 | 154篇 |
免费 | 19篇 |
国内免费 | 2篇 |
专业分类
175篇 |
出版年
2024年 | 3篇 |
2023年 | 2篇 |
2022年 | 1篇 |
2021年 | 4篇 |
2020年 | 6篇 |
2019年 | 6篇 |
2018年 | 11篇 |
2017年 | 9篇 |
2016年 | 6篇 |
2015年 | 3篇 |
2014年 | 12篇 |
2013年 | 6篇 |
2012年 | 12篇 |
2011年 | 9篇 |
2010年 | 10篇 |
2009年 | 7篇 |
2008年 | 3篇 |
2007年 | 14篇 |
2006年 | 6篇 |
2005年 | 3篇 |
2004年 | 1篇 |
2003年 | 4篇 |
2002年 | 2篇 |
2001年 | 2篇 |
2000年 | 3篇 |
1999年 | 3篇 |
1998年 | 1篇 |
1997年 | 2篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1993年 | 5篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 3篇 |
1981年 | 1篇 |
1979年 | 1篇 |
1977年 | 2篇 |
排序方式: 共有175条查询结果,搜索用时 0 毫秒
171.
172.
B. Arensburg 《Human Evolution》1996,11(2):139-145
Dental calculus has been often considered as a consequence of dietary habits, mainly related to the post Neolitic agricultural
development. The presence of fossilized bacteria in the Kebara 2 teeth, aged 60.000 years BP, and the similarity of oral pathologies
in pre and post Neolithic samples confirm the multifactorial etiology of oral diseases in general and dental calculus in particular. 相似文献
173.
174.
Projective properties of certain orthogonal arrays 总被引:2,自引:0,他引:2
175.
During the excavation of isolated graves along the north shore of the Orange River in the Cape Province of South Africa, a skeleton was uncovered that showed two large calcareous deposits near the lumbar region of the vertebral column. The individual was an adult female of about 55 years of age at the time of death. The calcified residue did not in any way resemble the external or internal anatomical form of a kidney, but X-ray powder diffraction analysis and scanning electron microscopy identified the material as apatite (Ca10(PO4)6 (OH)2), a common constituent of human urinary calculi. It is postulated that the bilateral calcification was the result of a chronic renal disorder. Although it is rarely possible to identify the cause of death from skeletal remains alone, the disorder as seen in this specimen would appear to have been very severe and may well have been the ultimate cause of death. 相似文献