Test results at transonic speeds on a contoured over-the-wing propfan model

A semispan wing/body model with a powered highly loaded propeller has been tested to provide data on the propulsion installation drag of advanced propfan-powered aircraft. The model had a supercritical wing with a contoured over-the-wing nacelle. It was tested in the Ames Research Center's (ARC) 14-foot Transonic Wind Tunnel at a total pressure of 1 atm. The test was conducted at angles of attack from -0.5 to 4 deg at Mach numbers ranging from 0.6 to 0.8. The test objectives were to determine propeller performance, exhaust jet effects, propeller slipstream interference drag, and total powerplant installation drag. Test results indicated a total powerplant installation drag of 82 counts (0.0082) at a Mach number of 0.8 and a lift coefficient of 0.5, which is approximately 29 percent of a typical airplane cruise drag

Lipid Synthesis in the Beef Animal

Rates of in vitro fat synthesis from acetate and lactate were compared to the activities of enzymes thought to be involved in the process of lipid synthesis from lactate. Results of these studies indicate that lactate can be incorporated into fats by a pathway heretofore thought to be nonfunctional in ruminants, the citrate cleavage:malic enzyme pathway. Studies of the effects of age and diet on the enzymes of the citrate cleavage:malic enzyme pathway support the concept of a physiological role for this pathway in lipid synthesis in beef cattle

The Need for Continued Development of Ricin Countermeasures

Ricin toxin, an extremely potent and heat-stable toxin produced from the bean of the ubiquitous Ricinus communis (castor bean plant), has been categorized by the US Centers for Disease Control and Prevention (CDC) as a category B biothreat agent that is moderately easy to disseminate. Ricin has the potential to be used as an agent of biological warfare and bioterrorism. Therefore, there is a critical need for continued development of ricin countermeasures. A safe and effective prophylactic vaccine against ricin that was FDA approved for “at risk” individuals would be an important first step in assuring the availability of medical countermeasures against ricin

Lipid Synthesis in the Beef Animal

Rates of in vitro fat synthesis from acetate and lactate were compared to the activities of enzymes thought to be involved in the process of lipid synthesis from lactate. Results of these studies indicate that lactate can be incorporated into fats by a pathway heretofore thought to be nonfunctional in ruminants, the citrate cleavage:malic enzyme pathway. Studies of the effects of age and diet on the enzymes of the citrate cleavage:malic enzyme pathway support the concept of a physiological role for this pathway in lipid synthesis in beef cattle

ECONOMIC IMPACTS OF CHEMICAL USE REDUCTION ON THE SOUTH

Agribusiness,

The Spiritually-Guided Enterprise: Setting A Course Of Study

This paper begins an exploration of the intersection between Christianity and business with a focus on the spiritually-guided enterprise.  It examines the impact of Christian leadership on business and seeks to explore whether Christians run their businesses differently. The purpose is to pose reflective questions that will indicate potential research studies and that will lead to a greater understanding and knowledge of this intersection

A Theory of Gravity Wave Absorption By Boundary Layers

A one-layer frictional model of the boundary layer is proposed to explain the nature of gravity wave absorption seen in numerical simulations. The key result is that friction causes the phase of the BL winds to shift upstream. The associated divergence in the BL winds modulates the BL thickness in way that allows the down-going gravity wave to be absorbed. To capture the BL effect, the reflection coefficient must be considered a complex number. In a lee wave situation, the influence of the boundary layer is to decay the wave amplitude and reduce its wavelength

Orographic Atmospheric Phenomena in Patagonia: A preliminary survey

The southern Andes create a variety of atmospheric phenomena, but these have not been well studied. In this paper, we describe our preliminary observations and modeling of a few of these phenomena including: the sharp vegetation gradient on the eastern slopes, orographic triggering of roll convection, foehn wall and short lee-wave [rains, liquid clouds capping ice clouds, "bullet" clouds, and isotopic fractionation of water vapor