Oliver H. Lowry, Nira J. Rosebrough, A. Lewis Farr, Rose J. Randall

Oliver H. Lowry, Nira J. Rosebrough, A. Lewis Farr, Rose J. Randall

Viktor Hamburger, Howard L. Hamilton

Gerhard Herzberg, S. Mrozowski

Elliott P. Barrett, Paul P. Halenda

The urbanization of the world, which is one of the most impressive facts of modern times, has wrought profound changes in virtually every phase of social life. The recency and rapidity of urbanization in the United States accounts for the acuteness of...

The paper considers a number of problems arising from the test of serial correlation based on the d statistic proposed earlier by the authors (Durbin & Watson, 1950, 1951). Methods of computing the exact distribution of d are investigated and the exact...

Essai philosophique en trois parties, la premiere sur l'antisemitisme, la deuxieme sur l'imperialisme a la fin du XIXe s., la troisieme sur le totalitarisme stalinien et nazi

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The citation for the published article is: Pauling, Linus, Robert Corey, and H. R. Branson. "The Structure of Proteins: Two Hydrogen-Bonded Helical Configurations of the Peptide Chain." Proceedings of the National Academy of Sciences 37 (1951): 205-211.

The test is based on the maximum difference between an empirical and a hypothetical cumulative distribution. Percentage points are tabled, and a lower bound to the power function is charted. Confidence limits for a cumulative distribution are described....

Complex dielectric constants have been measured at frequencies from below 20 c/s to 5 mc/s over the temperature range −40° to −75°C in glycerol, −45° to −90° in propylene glycol, and −80° to −140° in n‐propanol. The results for n‐propanol...

Full textFull text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (1.0M), or click on a page image below to browse page by page. 293294295296297298299300Images in this articleImage...

1. 1. Standard hydrokinetic orifice formulas have been applied to stenotic mitral, pulmonic, tricuspid, and aortic valves, patent ductus arteriosus, and atrial and ventricular septal defects. These formulas were considered applicatble because of the high...

A general statistical mechanical theory of solutions is developed with the aid of the theory of composition fluctuations in the grand canonical ensemble. It is shown that the derivatives of the chemical potentials and osmotic pressure with respect to...

Oliver C. Cox, Robert K. Merton, Paul F. Lazarsfeld

Evelyn Fix, J. L. Hodges

Diffusion in solids is known to occur along grain boundaries and over free surfaces more rapidly than through the interiors of crystals. In order to facilitate quantitative investigation of grain boundary and surfacediffusion, a mathematical analysis...

J. T. Curtis, R. McIntosh

A solution is given for the problem of the scattering of plane electromagnetic waves from a sphere with a concentric spherical shell. The solution is general, and under appropriate conditions is reduced to the well‐known solution for scattering from...

The parallel between the classical theory of elasticity and the modern physical theory of the solid state is incomplete; the former has nothing analogous to the concept of the force acting on an imperfection (dislocation, foreign atom, etc.) in a stressed...

In recent papers we have described several configurations of polypeptide chains with interatomic distances, bond angles, and other structural features as indicated by the studies in these Laboratories of the structure of crystals of amino acids, simple...

The theory of the scattering of plane waves of sound by isotropic circular cylinders and spheres is extended to take into account the shear waves which can exist (in addition to compressional waves) in scatterers of solid material. The results can be...

Presented at the Cold Spring Harbor Symposium in 1951, this paper focused on regulation and development rather than transposition, and strongly reflected McClintock's newfound interest in theory.

The motion of suspensoid particles relative to that of the solvent resulting from polarization forces produced by an inhomogeneous electric field is defined as ``dielectrophoresis.'' It is analogous to the related phenomenon of electrophoresis, in which...

The one‐ and three‐dimensional spectral equations for a field of isotropic temperature fluctuations in an isotropic turbulence are derived from the correlation equation. Then, except for the degenerate case of simple conductive decay, stationary fluctuation...

Based on a theory of porous solids previously developed by the author, the elasticity of a hexagonal close packing of equal spheres is treated. The packing is anisotropic and because of the weight of the spheres, also inhomogeneous. The velocities of...

Before examination of biological specimens can take place all volatiles must be removed. This presented paper details a method of sample preparation that reduces distortion and maintains 3-dimensional structure. Freeze drying disrupts cell structures...

Convenient formulas have been obtained for the overlap integrals ∫χ a χ b dv , kinetic energy integrals —½∫χ a Δχ b dv , nuclear attraction integrals Z∫χ a (1/ra )χ b dv and Z∫χ b (1/ra )χ b ′dv, and coulomb repulsion integrals ∫...

Judson S. Brown, Harry I. Kalish, I. E. Farber

G. H. Freeman, John Halton

A simple theory of alkali halide gas molecules in the spirit of Born‐Mayer lattice theory is presented. The molecule is considered to be constituted of ions, each of which is polarized by the electrostatic field of the other. This deformation polarization...

George A. Miller, George A. Heise, William Lichten

I. The concentration-profits hypothesis, 294. — II. Industry definition, measure of concentration, and selection of sample, 297. — III. Character and limitations of profit data, 305. — IV. Calculation of accounting profit rates, 310. — V. Association...

the objective of the present work was to provide a means for separating and indentifying phosphate esters involved in glycolysis in higher plants. Paper chromatography of phosphate esters has been employed by several workers, most notably Benson et al....

Large objects which propel themselves in air or water make use of inertia in the surrounding fluid. The propulsive organ pushes the fluid backwards, while the resistance of the body gives the fluid a forward momentum. The forward and backward momenta...

Jean Oliver, Muriel MacDowell, Ann H. Tracy

The focus of this report is the change in McClintock's thinking about biochemical and physical mechanisms to explain transposition, mutation, and gene expression. These changes were developed in a series of memos to Marcus Rhoades during 1950 and introduced...

It is shown in this part how the theory of large elastic deformations of incompressible isotropic materials, developed in previous parts, can be used to interpret the load-deformation curves obtained for certain simple types of deformation of vulcanized...

The solution of the quantum‐mechanical eigenvalue problem is discussed for cases when a series of approximate eigenfunctions is known. If these ``unperturbed'' states are divided into two classes, a perturbation formula is derived giving the influence...

Samuel Epstein, Ralph Buchsbaum, Heinz A. Lowenstam, Harold C. Urey

The Asymptotic Distribution of the Range of Sums of Independent Random Variables

Harold C. Urey, Heinz A. Lowenstam, Samuel Epstein, C. R. McKinney

Researches on the Measurement of Human Performance

A simple molecular orbital treatment is presented to explain the bonding in trihalide ions, X3 −, XY2 −, and XYZ−, and bifluoride ion, HF2 −. The M.O.'s are formed from linear combinations of npσ halogen orbitals, and the 1s hydrogen orbital...

The citation for the published article is: Pauling, Linus, and Robert Corey. "The Pleated Sheet, a New Layer Configuration of Polypeptide Chains." Proceedings of the National Academy of Sciences 37 (1951): 251.

Pappenheimer, Renkin Em, Borrero Lm

S. B. Barker, Mary Jane Humphrey, Mayo H. Soley

Allene Jeanes, C. S. Wise, R. J. Dimler

Samuel Irwin, Donald R. Bennett, Leland C. Hendershot, M. H. Seevers, Raymond W. Houde

The theory of the entropy of activation ΔS previously given for interstitial diffusion in metals is herein extended to self‐ and to chemical diffusion. It is concluded that this entropy of activation will always be positive; and it is shown that in...

H. Weil-Malherbe, R. Green

The Nonlinear Accelerator and the Persistence of Business Cycles

Paleontology and biochemistry together may yield fairly definite information, eventually, about the paleochemistry of sea water and atmosphere. Several less conclusive lines of evidence now available suggest that the composition of both sea water and...

NOTE ON A CLASS OF SOLUTIONS OF THE NAVIER-STOKES EQUATIONS REPRESENTING STEADY ROTATIONALLY-SYMMETRIC FLOW

Stuart C. Cullen, E. G. Gross

J.C. Goligher, Cuthbert Dukes, H. J. R. Bussey

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