Estimating Threshold Effects of Generic Fluid Milk and Cheese Advertising

Replaced with revised version of paper 08/01/06.Livestock Production/Industries, Marketing,

Estimating Threshold Effects of Generic Fluid Milk and Cheese Advertising

Marketing,

Receptor Proteins for Androgen in Hamster Sebaceous Glands

Chromatographic and ultracentrifugal techniques demonstrate that receptor proteins in hamster sebaceous glands play important biologic roles such as recognition, transfer, retention, and protection of the tissue-active androgen dihydrotestosterone. Since this is the first step of androgen action, any interference of the binding causes a loss of subsequent biologic sequellae, such as the stimulation of energy metabolism. Both the synthesis and degradation of the receptor proteins are highly dependent on dihydrotestosterone levels. The short half lives of the receptor proteins and of the messenger RNA for the receptors further contribute to the essential role of androgen receptors in controlling the dynamic actions of androgen in hamster sebaceous glands

Economic Impact of Bovine Tuberculosis on Minnesota’s Cattle and Beef Sector

Livestock Production/Industries,

Technical Efficiency in Bangladesh Rice Production: Are There Threshold Effects in Farm Size?

Replaced with revised version of poster 07/21/10.Data Envelopment Analysis, Threshold Estimation, technical efficiency, total factor productivity, rice, farm size, Bangladesh, Community/Rural/Urban Development, International Development, Productivity Analysis,

A Framework for the Economic Analysis of Ditch System Management Alternatives

Replaced with revised version of paper 05/10/06.Land Economics/Use,

Unsteady State Effectiveness Factor for Immobilized-Enzyme Reaction

The unsteady state concentration profiles of substrate in immobilized-enzyme particles were calculated numerically for the Michaelis-Menten kinetics. The analytical solution of the profile was also derived when the reaction was approximated to be of the first-order. The integration of the profile gives an unsteady state effectiveness factor. The unsteady state effectiveness factor was obtained under various conditions. The critical time at which a pseudo-steady state approximately holds, was presented graphically as a function of the steady state effectiveness factor for various V₀( ＝Kₘ/Cᴀ₀) values. The charts indicate that the pseudo-steady state is achived within 10-20s under usual operating conditions

Close-Packed Ices in Nanopores

Water molecules in any of the ice polymorphs organize themselves into a perfect four-coordinated hydrogen-bond network at the expense of dense packing. Even at high pressures, there seems to be no way to reconcile the ice rules with the close packing. Here, we report several close-packed ice phases in carbon nanotubes obtained from molecular dynamics simulations of two different water models. Typically they are in plastic states at high temperatures and are transformed into the hydrogen-ordered ice, keeping their close-packed structures at lower temperatures. The close-packed structures of water molecules in carbon nanotubes are identified with those of spheres in a cylinder. We present design principles of hydrogen-ordered, close-packed structures of ice in nanotubes, which suggest many possible dense ice forms with or without nonzero polarization. In fact, some of the simulated ices are found to exhibit ferroelectric ordering upon cooling