Due in part to this knowledge, the National Park Service recognized that an early management policy of introducing salmonids into naturally Ashless
lakes was counter to the National Park Service Organic Act of 1916 (39 Stat.
Areas that were loaded with fish prior to the summer's storm season may become Ashless
and vice versa due to habitat changes.
At that time, oil should be changed to an ashless
dispersant (AD) mineral-based oil.
Until settlers arrived, waterfalls and other impediments prevented fish from colonizing mountain waters, and so most of the streams and all the lakes in what became Yosemite National Park were naturally Ashless
Crude fat was measured by the acid hydrolysis method, nitrogen was measured by combustion, ash was determined by ashing in a muffle furnace, and acid insoluble ash was determined by ashing in a porcelain crucible followed by acid digestion, filtration onto ashless
filter paper, and ashing again.
While the lake remains Ashless
until present (Vrba et al.
However, throughout the course of our investigations empirical evidence indicates ashless
components affect LSPI frequency as well.
quantitative filter paper (GB/T1914-93) was used throughout the work.
The resulting sample was filtered (Whatman # 42 ashless
, Maidstone, England) and brought to a final volume of 200 mL with milli-Q water, then stored in vials at -20[degrees]C until use.
Then, the organic carbon concentration in the filtered extract (filter paper ashless
, 110 mm diam.
Unlike many traditional asphaltene dispersants, GE's new EmBreak 2167 and EmBreak 2168 crude stabilisers are ashless
and do not contain any metals that could contribute to catalyst contamination or equipment fouling.
In the end of a process, the extract was filtered through 8-10 layers of gauze and passed through ashless