Little attention has been paid to the influence of the repro ductive condition of the rat at the time of irradiation upon Xray-induced mammary carcinogenesis. At 12 weeks of age, 160 virgin female Sprague-Dawley rats were mated, and an other 140 were maintained as virgins. On Days 14 to 16 of pregnancy, 36 mated females and 40 virgins were whole-body irradiated with 200 R of X-rays. On Days 2 t...

The score matrix from a structure comparison program (SAP) was used to search for repeated structures using a Fourier analysis. When tested with artificial data, a simple Fourier transform of the smoothed matrix provided a clear signal of the repeat periodicity that could be used to extract the repeating units with the SAP program. The strength of the Fourier signal was calibrated against the s...

Investigated was the effect of age, sex, experience, locus of control, self image, and grade level taught on the attitudes of 139 regular and special class teachers toward handicapped individuals. Ss completed the Attitude Toward Handicapped Individuals (ATHI) Scale, an abbreviated 11-item Rotter Internal-External Locus of Control Scale, and the Self-Esteem Scale. Twenty-two predictor variables...

Understanding how the multidrug resistance phenotype is manifest in human cancer cells will require inslajat into the mechanism of assembly, transmembrane topology, and Intracellular trafficking ofhuman P-glyco protein (MDR1). Previously, we showed that MDR1 amino terminus biogenesis occurred through an unexpected Interaction between novel topogenic sequence subtypes and that transmembrane topo...

RoM an evolutionary viewpoint what is special about parentoffspring interactions? Most behavior that is performed at a reproductive or survival "cost" by one animal and that "benefits" (both terms sensu Hamilton, 1964) a recipient by increasing its chances of survival is thought to be done at some direct, usually immediate, cost to the actor. Generally such behavior will be selected against unl...

This paper elucidates the implications of life-span developmental psychology fOi theory and method in the field of child development. Emphasis is given to three theoretical issues: (1) historical-evolutionary versus ontogenetic components of change, (2) the role of chronological age, and (3) continui4y versus discontinuity in the description and explanation of behavior development. Two methodol...

With few exceptions, diurnal primates are distributed in large social groups that are spatially and temporally coherent. The goal of primate socioecology since 1960s has been to understand what drives and structures this distribution. Whereas initial syntheses (Crook and Gartlan, 1966; Eisenberg et al., 1972) focused on males, this emphasis gave way during the 1970s to an increasingly articulat...

A theoretical model was tested for its ability to explain persistence and delayed credibility (or "sleeper") effects in attitude change via persuasive variables. The model predicted opinion effects f:cm two major components: a multiplicative eftect of message repetition and credibility, and a simple effect of time since receipt of message. The subjects, 124 college students, read a cover story,...

0[ Burning typically occurs at intervals of 0Ð2!years in the Brazilian cerrado\ a rate that exceeds the precolonization _re regime[ To determine if woody plants of the cerrado successfully reproduce within the short span of time between burns\ exper! imental burns were used to quantify the e}ects of _re on sexual and vegetative reproduction of six species of resprouting trees and shrubs[ 1[ Fou...

Ned Tijdschr Klin Chem 2000, vol. 25, no. 4 4. Grossman PD, Colburn JC (eds.). Capillary Electrophoresis: Theory and Practice, Academic Press, San Diego, California, USA, 1992. 5. Vindevogel J, Sandra P. Introduction to Micellar Electrokinetic Chromatography. Hüthig Buch Verlag GmbH, Heidelberg, 1992. 6. Li SFH. Capillary Electrophoresis, Principle, Practice and Applications. Elsevier, Amsterda...