Optimum Pressure for Total-Reflux Operated Thermal Diffusion Column for Isotope Separation

Formation of Protocell-like Vesicles in a Thermal Diffusion Column

Many of the properties of bilayer membranes composed of simple single-chain amphiphiles seem to be well-suited for a potential role as primitive cell membranes. However, the spontaneous formation of membranes from such amphiphiles is a concentration-dependent process in which a significant critical aggregate concentration (cac) must be reached. Since most scenarios for the prebiotic synthesis o...

Optimum Thermal Environment for Naked Babies

Hey, E. N., and Katz, G. (1970). Archives of Disease in Childhood, 45, 328. The optimum thermal environment for naked babies. The optimum thermal environment in which to nurse a baby naked in an incubator has been defined from a knowledge of the magnitude of the factors affecting thermal balance. Such a neutral environment allows body temperature to remain normal while oxygen consumption and ev...

Novel PEFC Application for Deuterium Isotope Separation

The use of a polymer electrolyte fuel cell (PEFC) with a Nafion membrane for isotopic separation of deuterium (D) was investigated. Mass analysis at the cathode side indicated that D diffused through the membrane and participated in an isotope exchange reaction. The exchange of D with protium (H) in H₂O was facilitated by a Pt catalyst. The anodic data showed that the separation efficiency was ...

Ion Exchange Column Performance Model for Separation of Zr(IV) and Hf(IV) in Elution Process

A mathematical model of sorption of Zirconium and Hafnium cations mixture and elution of these ions from a cation exchange resin bed is developed. Sulfuric acid is selected as the eluent for selective separation of Zr and Hf in a packed bed of Dowex cation exchange resin. The column model is a dispersed plug flow model,and assumed to consist of randomly packed synthetic and spherical resin ...

Isotope Effects, Isotope Separation and Isotope Fractionation