Marilyn G. Farquhar

SUMMARY A model is presented for the estimation of genetic effects from the diallel cross and related populations of a fixed set of random-mating varieties with arbitrary gene frequencies at all loci assuming diploid inheritance, two alleles per locus...

Glucose, sorbitol, fructose, and inositol are present in peripheral nerve and spinal cord. Marked elevation of these substances occurs in these tissues in mildly diabetic animals. These alterations provide biochemical mechanisms which could be significant...

This report presents recently developed formulas for use in the measurement of two ordering effects found in sequences of freely recalled items. These effects are respectively labelled clustering and intertrial repetition. Clustering, as defined by Bousfield...

1. 1. A procedure is described for the assay of maltase, isomaltase, sucrase, lactase, cellobiase, and trehalase activity in homogenates of human small-intestinal mucosa. The disaccharide hydrolysis and the coupled enzyme reactions yielding a colored...

The relation between the area of contact and the constriction resistance which holds for a single circular contact spot is widely used in electric contact theory, although the normal mode of contact is by a large number of microcontacts. A method of finding...

A detailed experimental investigation of the gabbro-eclogite transformation in several basalts has been carried out. More than 200 runs at temperatures between 900 and 1,250°C and pressures up to 30 kbar were made, and the resultant phase assemblages...

The experiment tests the notion that naturally occurring states of physiological arousal are manipulable in the same way that drug-induced arousal states have proven to be. The state of arousal studied is that produced by pain from electric shock. All...

SummaryOptic fibers of retinal origin terminate in the lateral geniculate body exclusively in the so called glomerular synapses. They can be recognized on the basis of their unusually large irregular mitochondria having very few cristae. In the cat the...

A set of conditions are described which determine whether or not two successive portions of a given program can be performed in parallel and still produce the same results. The conditions are general and can be applied to sections of the program of arbitrary...

As a step beyond the Hartree—Fock technique in the search for better energies,wavefunctions, and the general description of molecular formation and dissociation, a configuration‐mixing method of the following nature is developed and illustrated for...

In some communication problems, it is a good assumption that the channel consists of an additive white Gaussian noise forward link and an essentially noiseless feedback link. In this paper, we study channels where no bandwidth constraint is placed on...

By the technique of artificial RNA-DNA hybridization the fraction of Xenopus laevis wild type DNA complementary to homologous 28-S and 18-S ribosomal RNA is found to be **0**.07 % and **0**.04 % respectively. The ribosomal RNA-DNA...

Jamshed R. Tata, C. C. Widnell

Nonbonded (exp−6) potential parameters for C···C, C···H, and H···H interactions were derived from the crystal structures and properties of aromatic hydrocarbons. The exponent of the C···C repulsion term was taken from a calculation based...

The problem of the convergence of a sequence of Hartree—Fock—Roothaan wavefunctions and energy values to the true Hartree—Fock results is examined for N2(X 1Σ g +). This critical study is based on a hierarchy of Hartree—Fock—Roothaan wavefunctions...

Hoggan Md, Neil R. Blacklow, Wallace P. Rowe

H. P. Leckie, H. H. Uhlig

CONTENTSIntroduction § 1. General relationships between metric and certain other spaces § 2. Quotient spaces of metrizable spaces § 3. General criteria for metrizability of a quotient space § 4. Closed mappings § 5. Perfect mappings § 6. Compact...

The relationship between the extent of diffusion of a solution and the volume injected has been investigated for cerebral tissue in anesthetized rats. Each of four dyes of unequal molecular weights was injected in a volume of either **0**.5,...

Certain excited states of molecules have been found to have anomalously long radiative lifetimes compared with the values calculated from integrated absorption coefficients. Using the properties of the stationary states, four mechanisms which may account...

D. H. Northcote, J. D. Pickett-Heaps

D. J. Sutherland, Ruse Jl, J. C. Laidlaw

This chapter discusses the factors and mechanisms governing the formation and destruction of water-stable soil aggregates. The formation and degradation of water-stable aggregates comprise a complex interrelationship of physical, biological, and chemical...

An Ising system consisting of triplet ions (S=1) with zero-field splitting and exchange interaction between nearest neighbours has been investigated using a molecular field approximation. The triplets are split into a singlet and a doublet by a crystal...

Y Ichikawa, Dov H. Pluznik, Leo Sachs

The decoupling of heteronuclear spin systems by means of a strong irradiation of rf magnetic random noise is explored theoretically and experimentally. It is shown that it is feasible to eliminate simultaneously all splittings due to one or more nuclear...

Serum concentrations of alpha fetoprotein (AFP) in the human conceptus were investigated and compared to the concentrations of albumin and gamma G-globulin. Determinations were made immunochemically over gestational periods from 6.6-39 weeks and in the...

In an investigation of the fundamental optical absorption edge of indium oxide at room temperature, transitions identified as direct‐allowed have been observed with an energy gap (probably at k=**0**) of 3.75 eV. Indirect‐forbidden transitions...

Presented here is a family theory of emotional illness and its component system of family psychotherapy, which is one of several different theoretical approaches to the family, and one of many different kinds of “family therapy” that have come on...

The ``multiple‐scattering'' technique of determining energy bands in solids is modified for the problem of calculating bound one‐electron eigenstates of polyatomic molecules. The computational simplicity and applicability of this method to molecules...

Bergström J, Eric Hultman

Marian C. Diamond, Rhodes Ha, Bernice Lindner, Mark R. Rosenzweig, Edward L. Bennett

Rigorous upper and lower bounds are obtained for the thermodynamic free‐energy density a(ρ, γ) of a classical system of particles with two‐body interaction potential q(r) + γνφ(γr) where ν is the number of space dimensions and ρ the density,...

Setsuya Fujita, Morimi Shimada, Tuneo Nakamura

Under appropriate conditions, data merely about the ordering of objects—or of the separations between objects—is sometimes sufficient to fix the positions of those objects on an essentially numerical scale. This paper uses both mathematical and...

B.R. Fish, Hatch Tf, P.E. Morrow

Meteoritic, solar and terrestrial rare-earth distributions.

The effect of cations on insulin release was studied in the isolated pancreas of the rat perfused with a synthetic perfusate consisting of albumin and buffer. The omission of calcium and magnesium ion completely inhibited insulin release stimulated by...

A virus, inactivated by ultraviolet light, was used to fuse together cells from different species of vertebrate, and the resulting heterokaryons were examined by autoradiographic and cytological techniques. Heterokaryons could be made with both differentiated...

“An even greater disappointment to all interested in synaptic physiology has been the failure tu elucidate the nature of any chemical trasmitter in the mammalian nervous system other then acetylcholine. It is a sorry situation that despite considerable...

The low-lying even-parity spectrum of 16O and 17O is described by mixing the usual states in the spherical shell model with deformed states obtained by exciting particles out of a deformed core.

Predators that spend a large proportion of their food collecting budget on the catching and killing of prey after the prey have once been discovered are shown to specialize on prey of a certain size. Such specialist predators frequently coexist in hunting...

Keir B. Sterling, Milton A. Brenner

N.R. Werthamer, Eugene Helfand, P.C. Hohenberg

Berson Sa, Rosalyn S. Yalow

A series of two‐dimensional classical kinematiccomputer calculations have been made on the hypothetical exothermic exchange reaction A+BC→AB+C, −ΔH=48.5 kcal mole−1. Product energy distribution (vibration, rotation, and translation; E vib, E...

Richard C. Graham, Morris J. Karnovsky

Duc-Nguyen, Huu (National Cancer Institute, Bethesda, Md.), Edith N. Rosenblum, and Robert F. Zeigel. Persistent infection of a rat kidney cell line with Rauscher murine leukemia virus. J. Bacteriol. 92:1133–1140. 1966.—The propagation of a murine...

SUMMARY The thiocholine technique for cholinesterase has been successfully adapted for the demonstration of enzyme distribution with the electron microscope. After fixation in buffered glutaraldehyde, thin slices of tissue were taken through a histochemical...

A Monte Carlo study has been made of a plasma of heavy ions immersed in a uniform neutralizing background. Systems containing from 32 to 500 particles, with periodic boundary conditions, were used. The results of the study are presented in terms of a...

Karl-Johan Åström, Torsten Bohlin

Four rules are proposed to explain the photoluminescent efficiency of Eu3+‐activated oxides: (a) uv absorbing groups in the host lattice should be nearest neighbors in the crystal structure to have sufficient wavefunction overlap; (b) the emission spectrum...

Refinement of the crystal structure of In2O3 at two wavelengths

The viscoelastic properties of some polyester-urethanes are compared with the properties of other polymers. The behavior observed is anomalous in that these polyurethanes exhibit an unusually high value of modulus well above their Tg, unaccounted for...

Our object is to present a broad review of this subject as a branch of hydrodynamics, referring both to the well known `implosion' mechanism first analysed by Lord Rayleigh and, more particularly, to the recently perceived possibility that effects of...

D. R. Keeney, J. M. Bremner

Full textFull text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (480K), or click on a page image below to browse page by page. 366367368369

The derivation of a closed expression is presented to calculate the vertical component of the gravitational attraction of a right rectangular prism, with sides parallel to the coordinate axis. As any configuration can be expressed as the sum of prisms...

The present report calculates in some detail the (intensity) spectrum to be expected for clipped (also called "limited") noise. Two cases are considered: (A), the clipping of an unmodulated noise band (DINA) [1] and (B) a carrier modulated by clipped...

Full textFull text is available as a scanned copy of the original print version. Get a printable copy (PDF file) of the complete article (860K), or click on a page image below to browse page by page. 398399400401402403

1. Measurements have been made of the gill areas of fourteen species of British fish, all marine except for the tench and trout. In addition the gill area of the Antarctic icefish, Chaenocephalus (lacking haemoglobin) has been measured.2. The different...

A comparison is made of the current/time curve obtained by the potential-sweep method and of the potential/time curve obtained galvanostatically. Limitations of the slow and of the fast potential-sweep technique, from the point of view of obtaining kinetic...

This paper discusses an integer-programming method for solving a special class of discrete programming problems called plant location. The basic contribution is that the problem is formulated as an integer program in such a way that the associated continuous...

In the past several years there has been considerable interest in the theory of infinite dimensional differentiable manifolds. While most of the developments have quite properly stressed the differentiable structure, it is nevertheless true that the results...

A simple classical model for the scattering of gas atoms from a solid surface is proposed and its characteristics are determined. The principal assumptions are (1) the interaction of a gas atom with a surface atom is represented by an impulsive force...

Asymptotic probabilities and differential equations

The frequency distribution of depths in ocean basins has been determined using the most recent American and Russian oceanographic charts as sources and a computer for data processing. Data have been complied for individual ocean basins and marginal seas,...

Cooley and Tukey have disclosed a procedure for synthesizing and analyzing Fourier series for discrete periodic complex functions. For functions of period N , where N is a power of 2, computation times are proportional to N log 2 N as expressed...

The conditions on the behavior of a wavefunction for a system of charged particles near the coalescence of any two of them are derived. The new features of the derivation are: (a) the fixed‐nucleus approximation is not required; (b) the wavefunction...

This chapter focuses on the mechanism of enzymes that degrade bacterial cell walls. The cell walls of all bacteria are composed of two or more polymers. They are ubiquituous in the bacterial world, are responsible for the shape and strength of the walls,...

A quantitative system has been developed for the study of transformation of human diploid fibroblasts in culture by two oncogenic viruses, SV40 and the E46 strain of adeno 7-SV40 "hybrid" virus. Seven of the eleven cell strains derived from human skin...

The infra-red spectra of metal—isothiocyanate, MNCS, complexes (M = Mn, Fe, Co, Ni, Cu, Zn) with pyridine, picoline and quinoline have been investigated in the 3000-200 cm−1 region and assignments have been made for the metal—ligand and metal—isothiocyanate...

Annica Dahlström, Jan Häggendal

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