| prolyl endopeptidase inhibitors from the underground part of rhodiola sachalinensis. | the methanolic extract of the underground part of rhodiola sachalinensis was found to show inhibitory activity on prolyl endopeptidase (pep, ec. 3.4.21.26), an enzyme that plays a role in the metabolism of proline-containing neuropeptidase which is recognized to be involved in learning and memory. from the meoh extract, five new monoterpenoids named sachalinols a (24), b (25) and c (26) and sachalinosides a (23) and b (27) were isolated, together with twenty-two known compounds, gallic acid (1), ... | 2001 | 11310664 |
| bacterial diversity in malan ice core from the tibetan plateau. | three ice core samples were collected from the malan ice core drilled from the tibetan plateau, and three 16s rdna clone libraries by direct amplification from the ice-melted water were established. ninety-four clones containing bacterial 16s rdna inserts were selected. according to restriction fragment-length polymorphism analysis, 11 clones were unique in the library from which they were obtained and used for partial sequence and phylogenetic analysis, and compared with 8 reported sequences fr ... | 2004 | 15259767 |
| phylogenetic diversity of bacteria isolates from the qinghai-tibet plateau permafrost region. | the qinghai-tibet plateau in east asia is a unique and important permafrost environment. however, its microbiology remains largely unexplored to date. in this study, sediment samples were collected from the qinghai-tibet plateau permafrost region, bacteria isolation procedures were performed 8 times, and the samples incubated at 4 degrees c for nearly 3 months. the number of colony forming units (cfu) ranged from 0 to 10(7)/(g dry soil). the quantity of culturable bacteria grew exponentially wit ... | 2007 | 17898857 |
| abundance and community of snow bacteria from three glaciers in the tibetan plateau. | bacterial abundance and diversity in snow of east rongbuk, laohugou and hailuogou glaciers on the tibetan plateau were investigated through epifluorescence microscope and denaturing gradient gel electrophoresis. cell abundance ranged from 4.0 x 10(3) to 290.2 x 10(3) cells/ml. the phylogenetic trees placed the 16s rrna sequences in four major groups: proteobacteria, firmicutes, actinobacteria and bacteroidetes. brevundimonas, flavobacterium, hymenobacter, bacillus, polaromonas, rhodoferax and st ... | 2010 | 21174974 |