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Abstract CHARMM ( C hemistry at HAR vard M acromolecular M echanics) is a highly flexible computer program which uses empirical energy functions to model macromolecular systems. The program can read or model build struct...

This paper presents evidence from three samples, two of college students and one of participants in a community smoking-cessation program, for the reliability and validity of a 14-item instrument, the Perceived Stress Sc...

An encryption method is presented with the novel property that publicly revealing an encryption key does not thereby reveal the corresponding decryption key. This has two important consequences: Couriers or other secure ...

Materias / palabras clave: Endonuclease; DNA; Restriction enzyme; Agarose; Oligonucleotide; Chemistry; Molecular biology; DNA polymerase; DNA clamp; Polymerase; Polymerase chain reaction; Biochemistry

We have developed a procedure for preparing extracts from nuclei of human tissue culture cells that directs accurate transcription initiation in vitro from class II promoters. Conditions of extraction and assay have been...

Materias / palabras clave: Economics; Evolutionary theory; Evolutionary economics; Neoclassical economics; Epistemology; Philosophy

Journal Article An Evolutionary Theory of Economic Change Get access An Evolutionary Theory of Economic Change. By Richard R. Nelson and Sidney G. Winter. (Cambridge, Massachusetts & London: Harvard University Press, 198...

Classical Monte Carlo simulations have been carried out for liquid water in the NPT ensemble at 25 °C and 1 atm using six of the simpler intermolecular potential functions for the water dimer: Bernal–Fowler (BF), SPC,...

Materias / palabras clave: Work (physics); Psychology; Political science; Sociology; Engineering; Mechanical engineering

Abstract For a successful analysis of the relation between amino acid sequence and protein structure, an unambiguous and physically meaningful definition of secondary structure is essential. We have developed a set of si...

Materias / palabras clave: Psychology; Social psychology

Materias / palabras clave: Galleria mellonella; Photorhabdus luminescens; Biology; Lipopolysaccharide; Immune system; Innate immune system; Hemolymph; Superoxide dismutase; Microbiology; Photorhabdus; Lysozyme; Catalase

There is a deep and useful connection between statistical mechanics (the behavior of systems with many degrees of freedom in thermal equilibrium at a finite temperature) and multivariate or combinatorial optimization (fi...

Materias / palabras clave: Cytotoxicity; Formazan; Colorimetry; Lysis; Molecular biology; Cell growth; Lymphokine; Bioassay; Chemistry; Biology; Biochemistry; Chromatography

One method of evaluating the degree of neurologic impairment in MS has been the combination of grades (0 = normal to 5 or 6 = maximal impairment) within 8 Functional Systems (FS) and an overall Disability Status Scale (D...

Materias / palabras clave: Separation (statistics); Business; Control (management); Economics; Mathematics; Statistics; Management

Materias / palabras clave: Plasmid; Transformation (genetics); Escherichia coli; Plasmid preparation; Biology; Incubation; Dithiothreitol; T-DNA Binary system; DNA; Transformation efficiency; Chemistry; Genetics

A self-assessment scale has been developed and found to be a reliable instrument for detecting states of depression and anxiety in the setting of an hospital medical outpatient clinic. The anxiety and depressive subscale...

Instead of examining why organizations are dissimilar, this study explores why organizations tend to be increasingly and inevitably homogenous in their forms and practices. Organizations in a similar line of work are str...

The propensity score is the conditional probability of assignment to a particular treatment given a vector of observed covariates. Both large and small sample theory show that adjustment for the scalar propensity score i...

Materias / palabras clave: Neuroscience; Psychology