DuPont (United States)

Estimation of the surface free energy of polymers

Abstract A method for measuring the surface energy of solids and for resolving the surface energy into contributions from dispersion and dipole‐hydrogen bonding forces has been ...

Ridge Regression: Biased Estimation for Nonorthogonal Problems

In multiple regression it is shown that parameter estimates based on minimum residual sum of squares have a high probability of being unsatisfactory, if not incorrect, if the pr...

Multilayers of colloidal particles

A System for Rapid DNA Sequencing with Fluorescent Chain-Terminating Dideoxynucleotides

A DNA sequencing system based on the use of a novel set of four chain-terminating dideoxynucleotides, each carrying a different chemically tuned succinylfluorescein dye distingu...

Concepts in Theoretical Heterogeneous Catalytic Reactivity

Introduction A. General The heart of many commercial catalytic processes involves chemistry on transition metal particles and surfaces. The success in designing active surface e...

Sequence of a genomic DNA clone for the small subunit of ribulose bis-phosphate carboxylase-oxygenase from tobacco

We have cloned and sequenced a gene for the small subunit (SS) of ribulose bis-phosphate carboxylase-oxygenase from Nicotiana tabacum. The tobacco gene is most closely related t...

X-Ray and Infrared Studies on the Extent of Crystallization of Polymers

The current x-ray and infrared techniques for estimation of the crystalline-amorphous ratio in polymers are surveyed. Representative data are assembled for some of the common cr...

Fine Structure of Viscose Rayon

Quantitative x-ray diffraction methods have been used to study the orientation of the cellulose chains and lateral ordering around the long chain axes in various commercial and ...

On the interpretation of dynamic contact angles in capillaries

The motion of two immiscible fluids with arbitrary viscosities flowing through a capillary with an almost flat fluid-fluid interface is investigated in the limit of small capill...

Comment

The issue of mean-centering has generated a lot of discussion. The point of view described by Belsley in his current article and in Belsley, Kuh, and Welsch (1980), in contrast ...