Production of acetone-butanol-ethanol (ABE) through the fermentation process is one alternative that needs to be developed. Less economical in ABE difficulty separation from product and by-products reaction. Among methods, such as extraction, distillation, adsorption, gas stripping, distillation method still most widely used process. The purpose this study was provide recommendations for predic...

To investigate the extent and causes of recent quaking aspen (Populus tremuloides) recruitment in northern Yellowstone National Park, we measured browsing intensity and height of young aspen in 87 randomly selected aspen stands in 2012, and compared our results to similar data collected in 1997-1998. We also examined the relationship between aspen recovery and the distribution of Rocky Mountain...

Aspen has been declining in Jackson Hole for many years, a condition generally attributed to the fact that lightning fires have been aggressively suppressed since the early 1900s. It is also believed that burning will successfully regenerate aspen stands despite high elk numbers. To test this hypothesis, I evaluated 467 burned and 495 adjacent, unburned aspen stands at eight different locations...

Because firm conduct in Aspen Skiing stands at the outer boundaries of monopolization, it has received considerable scrutiny from antitrust scholars. The critical and somewhat puzzling determination of the relevant geographic market in this case—“the Aspen area”—however has received essentially no attention. In this paper, we report the results of archival and interview research to illuminate t...

STUDY DESIGN Four conditions (three orthoses, one no orthosis), full cross-over, randomized order, 12 subjects tested 3 months after a lumbar surgical arthrodesis. OBJECTIVES To assess whole torso and lumbar motions and comfort for each orthoses condition during performance of activities of daily living. SUMMARY OF BACKGROUND DATA Previous noninvasive studies measured whole torso (not just ...

In northern Yellowstone National Park, quaking aspen (Populus tremuloides) stands were dying out in the late 20th century following decades of intensive browsing by Rocky Mountain elk (Cervus elaphus). In 1995–1996 gray wolves (Canis lupus) were reintroduced, joining bears (Ursus spp.) and cougars (Puma concolor) to complete the guild of large carnivores that prey on elk. This was followed by a...

This paper presents simulation studies on the recovery of Acetonitrile from aqueous waste pharmaceutical processes. The focus is atmospheric distillation in two sequential columns to understand separation feasibility system; first column produces a distillate azeotropic composition, which mixed with fresh stream and fed second column, 99.9% pure residue. effect reflux ratio, reboiler duty flowr...

We report long-term patterns of quaking aspen (Populus tremuloidesMichx.) recruitment for five ungulate exclosures in the northern ungulate winter range of Yellowstone National Park. Aspen recruitment was low (<3 aspen·ha−1·year−1) in the mid-1900s prior to exclosure constructiondue toherbivorybyRockyMountain elk (Cervus elaphus Linnaeus, 1758) but increasedmore than60-fold within 25 years afte...