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Biomedical subjects

J Hunt

Publications and source records attributed to J Hunt.

At least 217 records · Page 12Linked to original sources
PubMed1978

Relationship between birth order and leadership style for nursery school children.

36 nursery school children were given a revised form of Fiedler's (1967) least preferred co-worker scale designated as the least preferred playmate scale. The purpose was to investigate the relationship between least preferred playmate scores and the birth order of young children. A 2 X 2 contingency table was constructed between birth order (first and later born) and leadership style (high and low). The resulting chi squares were insignificant for the total population and for males. However, for females the results were significant with a higher percentage of firstborns being task-oriented (low score) and a higher percentage of later borns being relation-oriented (high score).

Birth Order↗
PubMed1978

Method-specific variations in the calibration of a new immunoglobulin standard suitable for use in nephelometric techniques.

The putative International Federation of Clinical Chemistry immunoglobulin standard, IFCC 74/1, was calibrated against the World Health Organization (WHO) immunoglobulin standard 67/99 by three different methods: automated immunoprecipitation, Laurell rocket immunoelectrophoresis, and radial immunodiffusion. The same antisera were used in all the assays, which were performed in five expert laboratories. With the aid of linearizing transformations for the dilution curves of both materials and use of a carefully weighted statistical evaluation, values in International Units for IgG, IgA, and IgM were ascribed to IFCC 74/1. The values achieved by the three different methods were not statistically different, except in the case of IgA. IgM assays by automated immunoprecipitation were excluded owing to a high degree of imprecision.

Evaluation Studies as Topic↗
PubMed1975

The effect of indomethacin of HMG-HCG induced ovulation in the phesus monkey.

The investigation was designed to study the influence of indomethacin on gonadotropin induced ovulation in the rhesus monkey. Six mature female monkeys were treated with HMG-HCG for at least 2 control ovulatory cycles at dosage levels adjusted to induced ovulation while avoiding superovulation. Ovulation was confirmed by observation of the ovaries for fresh ovulation points at laparotomy. Following establishment of an appropriate dosage schedule, treatment was begun with indomethacin (5 mg/kg/day) starting 5 days prior to HCG and continuing to the time of laparotomy. In a second treatment cycle, indomethacin was administered at a dose of 5 mg/kg b.i.d. together with the established dose of HMG-HCG. Ovarian inspection was carried out as in the control cycles. Venous blood was obtained on treatment days 4, 7, 10 and 11 for determination of serum estrone, estradiol and progesterone. Indomethacin administration resulted in ovulation inhibition at a dose of 10 mg/kg/day when ovulation inducing doses of gonadotropins were administered. Peripheral blood steroid levels suggest that follicle maturation and estrogen production was unimparied by indomethacin. These findings indicate that the ovarian synthesis of prostaglandin may be essential in the process of ovulation.

Animals↗
PubMed1975

Social class and preschool language skill: IV. semantic mastery of shapes.

Sociolinguists have contended that children, and especially black children, from families of poverty commonly fail in school not because they have either a cognitive or language deficit but because they have a dialect problem. Being unfamiliar with standard English, they are forced to undertake a double task while learning to read. In order to test the validity of this contention, 54 Head Start and 33 nursery-school children of four years were examined with a test of shape identification. The children of Head Start identified six shapes perceptually by matching them about as well as did the nursery-school children. On the other hand, a much smaller percentage of Head Start than of nursery school named correctly all the shapes as they were indicated by the examiners or indicated correctly all the shapes when they were named by the examiners. Sex differences in semantic mastery of shapes are absent; and among the children of Head Start, race differences in semantic mastery of shapes are also absent. The deficit in semantic mastery for shapes is clearly evident, and demonstrating the existence of such deficits can be useful in guiding compensatory education.

Child, Preschool↗
PubMed1975

Social class and preschool language skill: V. Cognitive and semantic mastery of number.

This study was done to test the validity of two hypotheses of why children, and especially black children, of families of the poverty sector commonly fail in school. Sociologists deny for them either a cognitive or a linguistic deficit, and blame their failures on having to master the unfamiliar dialect of standard English while learning to read. The authors, on the other hand, blame the failures on inadequacies of early preschool experience that result in such deficits as one in semantic mastery of various elementary abstractions. In 1970-1971, 87 four-year-old students (58 black and 29 white) of Head Start and 33 of nursery school were examined with a five part test of number identification. In 1971-1972, the study was repeated with 69 four-year-olds of Head Start and 46 of the nursery school. A much smaller percentage of Head Start than of nursery school identify the numbers of blocks from 2 through 4 by either the heard or spoken mode of number identification. For numbers 5 and 6, most children of both classes fail. The evidence for a semantic deficit for number is very strong. The evidence indicates also a deficit in the span of apprehension and suggests the existence of class differences in the power of examiner demands for heard and for spoken identification to elicit the counting strategy. Evidence of sex differences in semantic mastery of number is absent, and among Head Start children, race differences lack statistical significance. These findings are highly dissonant with the contention of the sociolinguists that no cognitive or linguistic deficits exist and uncovering them can be helpful in guiding compensatory education.

Child, Preschool↗
PubMed1975

Chrysotile asbestos: biological reaction potential.

Evidence is presented indicating that chrysotile asbestos induces rapid cellular ageing in lung fibroblast cultures. Depending on the dose of asbestos given to these cultures the formation of fibrous collagen is enhanced or suppressed. The reaction of chrysotile at the cellular and molecular level is discussed and is considered to be determined by the organic coating it receives or the manner in which the surface absorbed material is modified. Studies are included of the ability of chrysotile to adsorb and retain serum proteins, pulmonary surfactant and lysosomal enzymes. Finally, a critical appraisal is given of the theories accounting for chrysotile-induced fibrogenesis particularly related to the lung fibroblast system studied.

Asbestos↗