排序方式: 共有2条查询结果,搜索用时 46 毫秒
1
1.
Twenty two crude ethanolic extracts from 14 indigenous medicinal plants were subjected to enzyme inhibition screening against acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and lipoxygenase enzymes (LO). Three extracts showed activity against AChE, nine extracts were found to be active against BChE and four extracts inhibited the enzyme LO. The most significant inhibition activities (> or =50%) were found in extracts derived from Aloe vera (leaves), Alpinia galanga (rhizome), Curcuma longa (rhizome), Cymbopogon citratus (leaves), Ocimum americanum (leaves), Ocimum americanum (stem) and Withania somnifera (roots). 相似文献
2.
Measurement of soil radioactivity levels and radiation hazard assessment in mid Rechna interfluvial region,Pakistan 总被引:1,自引:0,他引:1
Abdul Jabbar Waheed Arshed Arshad Saleem Bhatti Syed Salman Ahmad Saeed-Ur-Rehman Muhammad Dilband 《Journal of Radioanalytical and Nuclear Chemistry》2010,283(2):371-378
Radioactivity levels in soil samples, collected from mid Rechna interfluvial region, Pakistan have been estimated by using
gamma ray spectrometric technique. 226Ra, 232Th, the primordial radionuclide 40K and the artificial radionuclide 137Cs have been measured in the soil of the study area. The mean radioactivity levels of 226Ra, 232Th, 40K and 137Cs were found to be 49.0 ± 1.6, 62.4 ± 3.2, 670.6 ± 33.9 and 3.5 ± 0.4 Bq kg−1 respectively. The mean radium equivalent activity (Raeq), outdoor radiation hazard index (H
out), indoor radiation hazard index (H
in) and terrestrial absorbed dose rate for the area under study were determined as 189.9 ± 8.8 Bq kg−1, 0.51, 0.65 and 70.1 nGy h−1 respectively. The annual effective dose to the public was estimated to be 0.43 mSv. The measured values are comparable with
other global radioactivity measurements and are found to be safe for public and environment. 相似文献
1