Late-successional temperate forests (which we define as forests in which all individuals belonging to the initial cohort of trees have died) are often N-limited, yet 'N fixers' (here, tree taxa that have been shown to form N-fixing symbioses, or an individual tree that belongs to such a taxon, regardless of whether it is actively fixing N) are rare or absent in these forests [2].
By 21 hours, nearly all heterocysts appear fully formed, contain polar cyanophycin granules, and are actively fixing nitrogen.
Under atmospheric oxygen conditions, Frankia actively fixes dinitrogen to ammonium within the root nodules of the host plants and aerobically in culture [ 9– 15].
The time point at 4 weeks represents initial nodule development, 8 weeks mature nodules actively fixing nitrogen, and 14 weeks senescing nodules.
A right ventricular (RV) shock lead (model 1580 Riata, St Jude Medical, Sylman, CA, USA or model 6947 Sprint Quattro Secure, Medtronic Inc., Minneapolis, MN, USA) was introduced and actively fixed to the RV apical wall.
The results show that the various CR1 subtypes differ not only in the median time points on the relative timescale during which they were actively fixed in the genome, but also in the lengths of these time windows, revealing three major peaks of concentrated CR1 activity/fixation.
One route is to work on actively fixing the problems, even if you don't think you will or can't succeed.
Actively managed fixed income funds (with the exception of emerging market debt) fared much worse.
But although every player has been cited, not all of them have been accused of actively conspiring to fix the game.
There is nothing to suggest that the South African officials actively helped to fix the games and it may be that they were duped as so many others have been.
