Mice were exposed to diesel exhaust for 9 months prior to evaluation for benzo(a)pyrene disposition. On the last day of exposure the mice were instilled intratracheally with tritiated-benzo(a)pyrene ([3H]BP). The mice were sacrificed at intervals of 2, 24, and 168 hours. Disappearance of radioactivity from lungs and liver was rapid and essentially linear with time. In lungs, liver, and testes; [3H]BP metabolites were found mainly as conjugates, a form readily excretable. Clearance of the hydrocarbon from liver and testes in exposed mice was not markedly different from that in nonexposed mice. However, mice exposed to diesel exhaust had delayed [3H]BP clearance from lungs, possibly due to [3H]BP adsorption to diesel smoke particles.

Electrophoretic variation at twenty gene loci, patterns of behavioral thermoregulation, and genotype-specific malate dehydrogenase kinetics were investigated among populations of the red shiner, Notropis lutrensis, and the blacktail shiner, N. venustus, collected from thermally altered and thermally unaltered portions of their ranges. Genic variation was found to be high among red shiners and low among blacktail shiners. The behavioral response of the blacktail shiner to temperature was fixed among the populations sampled, whereas the response of the red shiner was mutable. Finally, blacktail shiners have incorporated into their genome an Mdh-B allele which functions well at low temperatures; red shiners, displaying high levels of Mdh-B polymorphism, maintain a more complex set of allozymes which function well over a wide range of environmental temperatures. These data are consistent with reported ecotypic distributions of the species in Texas waters; i.e., blacktail shiners occur in cool, thermally static habitats, and red shiners are tolerant of wide temperature ranges.

The present study examined whether a relationship exists between level of rigidity and prejudicial attitudes and whether prejudiced attitudes could be modified as a function of exposure to a competent black model. It was predicted that individuals with a high level of rigidity would display more racial prejudice than low-rigid individuals and that individuals with a low level of rigidity would demonstrate less prejudice than high-rigid individuals after exposure to a competent model. After exposure to a competent model, a significant main effect for rigidity was found which indicated that low-rigid individuals became less prejudiced than high-rigid individuals,

The purposes of this study were to develop an instrument to measure knowledge of leisure opportunities, and determine the reliability of the instrument. Subjects included 292 orthopedically impaired, nine to fourteen year old children. A multiple-choice format is used. The content is based on four domains. These are entertainment, games, sports, and arts and crafts. The domains are subcategorized into who, where, what, when, and cost of activities. The Kuder-Richardson formula 20 showed a reliability coefficient of .81. The Pearson, point biserial correlation was used to determine item-test correlations. Correlations below .20 were revised. Items with a difficulty level of 70 percent and above were also revised. The results indicated that the instrument had been successfully developed.

A collaborative pilot study of the microflora on biological activated charcoal (BAC) filters employed in the tertiary treatment of drinking water revealed the principle bacterial genera to be Pseudomonas, Alcaligenes, Achromobacter, Bacillus, Micrococcus, Corynebacterium, Chromobacterium, Microcyclus and Paracoccus. The microbial population of the filters paralleled seasonal carbon dioxide production. Of particular interest were the effects of the BAC miroorganisms upon precursors of trihalomethanes (THMs). Mixed populations of BAC microorganisms were cultivated for 50 days in a mineral salts-humic acid medium. It was concluded that (1) the BAC microflora enhances the absorptive capacity of the filters; (2) chemico-physical and biological processes operate in concert to lower the concentration of precursors of THMs; and (3) few bacterial pathogens establish themselves on the filters.

Data were collected from natural and introduced fishes present in Ferndale Lake, a small (120 ha) sport fishing reservoir in Camp County, east Texas. Levels of pH measured in the lake during the study period ranged from 3.5 to 5.3. Monthly field surveys and experimental manipulations were designed to evaluate quantitatively the signs of stress at various biological levels. Lethal limits to low pH were quantified for largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus) to be pH 3.8 and 4.0,respectively. Mean blood pH (+ 1 SD) of 59 bluegill was 7.41 (j 0.16), with no significant difference (P-0.05) among groups from Ferndale Lake and Moss Lake (Cooke Co., Texas) under experimental conditions, even when severe stress was externally apparent. In a dual-trough horizontal pH gradient, bluegill behavioral avoidance was observed at pH levels below 7.0. Individual testing of 40 bluegill in pH gradient of 5.2 to 7.6 resulted in median occupation of pH 7.1,with an interquartile range of pH 6.9 to 7.3. Decreased community structure and population "well being" compared to early studies cannot be attributed entirely to recent acidic condition. Separating potential stress due to lake conditions from that due to heavy biotic predation by sport fishing in …

Emerson frequently illustrates his philosophy with complementary scientific examples that clarify his ideas. This study examines Emerson's enumeration of the laws and powers of Intellect in conjunction with twentieth-century science, illustrating his ideas in the method he often employs. The physiological model of the two hemispheres of the brain parallels the two intelligences Emerson ascribes to man--understanding and reason. Hemispheric theories describe an analogue to the Emersonian epiphany-- hemispheric integration--and help to distinguish the epiphany from other experiences associated with altered states of consciousness. Quantum physics and relativity theory illustrate the vision of the unity of nature perceived during the epiphany. Using modern science to illustrate Emerson's ideas in this way makes us apprentice to a rhetorical technique used and advocated by him.

Human chorionic gonodotropin (HCG) affected in various ways cell cultures infected with strains of Rous sarcoma virus (RSV). The cell cultures studied were chick embryo fibroblasts (CEF), normal rat kidney cells infected with temperature-sensitive mutant (LA31-NRK) and a wild type RSV (B77-NRK). HCG increased the rate of transformation and viral titer of CEF cells infected with RSV, but not B77-NRK. HCG increased significantly transformation rates of LA31-NRK, only if the temperature sensitive transformation process was first delayed by incubation at non-permissive temperatures. It is suggested that some postinfective, pretransformational event(s) may operate before viralmediated transformation rates are increased by HCG.

The purpose of this study was to identify and describe the convictions about choral conducting is held and applied by Caro Carapetyan which may have contributed to his superior choral work. The primary source of information was a series of personal interviews with Carapetyan. The report was organized into five sections. The first part supplied background material. Subjects covered in the report include philosophy, the relationship between conductor and singers the conductor's knowledge of music history and literature, rehearsal planning, conducting technique the selection of singers, choral tone, blend and balance, diction, intonation, rhythm, and dynamics. Each of the chapters in Parts II, III and IV includes a summary and some comparisons with other choral music sources. The fifth part is a summary of the findings, conclusions, and recommendations. Recommendations for choral conductors and future researchers are included.

Sun Yat-sen used six propaganda techniques in the United States to help overthrow the Ching Dynasty in 1911: (a) individual propaganda to gain supporters through personal contact and individual persuasion; (b) propaganda of deed to solicit donations and to mobilize his supporters for military actions; (c) travel propaganda to broaden the base of revolutionary support; (d) newspaper propaganda to publicize and explain his revolutionary program; (e) debate propaganda to refute antirevolutionary criticism through speeches and pamphlets; and (f) missionary propaganda to seek sympathy and support from American missionaries and Christians.

The purposes of this study were to investigate attitudes toward apparel shopping and apparel shopping behavior of a selected group of working women in the Dallas, Texas, area. The study also examined relationships of occupation, education, age and marital status to apparel shopping attitudes and behavior. The study concluded that working women enjoy shopping for apparel but do encounter certain frustrations. Working women shop for apparel every few weeks or more and most often purchase apparel in department stores. The majority use charge accounts and often purchase apparel at reduced prices. Chi square analysis revealed few significant relationships between attitudes toward apparel shopping and apparel shopping behavior and the demographic variables of occupation, education, age and marital status.

This study reviews the evolution of Nigerian broadcasting from 1935 to 1979, with emphasis on the development of Nigerian television broadcasting. The problem was to discern how Nigeria's social and political structures have affected its radio and television system. The study concludes that both the heterogeneity of Nigerian society and the country's continued political unrest pose a threat to either private or government ownership of television stations. Today, approximately 1.5 million television sets serve over 80 million Nigerians, and this imbalance should be corrected before Nigerian television can be considered a mass medium. Nigeria's present administration maintains that its control of the country's television is necessary; critics feel, however, that federal control restrains television from developing its potential, especially in promoting national unity.

Pectin and oats as two sources of dietary fiber have been suggested as having a hypolipidemic effect. Ten subjects included either twenty grams of pectin or eighty grams of rolled oats daily in their self-selected diet. A baseline for each subject was calculated from blood samples taken prior to supplementation. Fasting blood samples were also taken ten, twenty-one, and thirty-one days after beginning supplementation. All blood samples were analyzed for these values; serum cholesterol, serum trigyceride, hematocrit, hemoglobin, serum albumin, and total serum protein. No significant changes were seen in the cholesterol, hematocrit, hemoglobin, and total protein values. A significant decrease was seen in nine triglyceride values. Albumin levels showed a significant increase in all subjects. No significant differences due to the two treatments were seen.

Subjects were 32 computer programmers employed in a large computerized tax-processing company in the Southwest. Ratings of each programmer's job performance by his/her immediate supervisor and scores on the Aptitude Test for Programmer Personnel (ATPP) were obtained. Relationships between test scores and criteria were examined to identify significant (p < .05) correlations. Statistical treatment of data included zero-order Pearson product-moment correlation, multiple linear regression, and first-order semi-partial correlation analyses. Results indicated that the ATPP did not successfully predict (2 >.05) the rated performance of the programmers.

Fifteen three-, four-, and five-year olds were assessed for the amount of time they spent on, off, under, and touching play equipment in an environment with play events and one without (i.e. the platform condition), An ABAB experimental design was used. Treatments lasted 3 days a week for 4 consecutive weeks, with each age group being videotaped 20 minutes each day, Data collected from the videotapes was applied to a 3 x 4 (age x treatments) ANOVA and revealed at the . 05 level (a) significantly more on and touching in the play event conditions; (b) significantly greater off and under in the platform (non play event) conditions; (c) a significant increase in off behavior from the first to second play event condition; (d) three-year-olds spent more time under and touching, and significantly less time on; and (e) significant interactions for on and under which seemed to be caused by the three-year-olds showing an inordinate amount of under behavior in the second platform condition, These results supported the assumption that play events would cause a significant increase inactive child-equipment interaction.

Biotransformation and biodegradation rate constants were determined for naphthalene, lindane, and phenol in water samples from three different sources. Rate constants produced from monitoring disappearance of the parent chemical (biotransformation) were compared to those obtained from mineralization of the chemical (ultimate biodegradation) by ¹⁴CO₂ evolution as well as acidification of the residual ¹⁴C-labeled compound (primary biodegradation). Rate constants were statistically different for the three chemicals. The water source affected the rate constants. When biomass measurements of the waters were considered and second-order rate constants were derived, there was no statistical evidence that this parameter gave a reliable rate constant statistic that could be useful in predicting the fate of any of naphthalene, lindane, and phenol in these waters.

Although most research has focused on adults, studies indicate that children also experience detrimental psychological effects as the result of natural disasters. The purpose of the present study was to determine if the tornado which struck Wichita Falls,, Texas, on April 10, 1979, had any negative effects on the academic performance or social behavior of school children. Three groups of students were studied: (a) victims of the tornado who suffered a significant loss, (b) observers of the disaster who did not suffer a significant loss, and (c) newcomers who arrived after the disaster. Achievement test scores, grades, and attendance over a 4-year period were studied. The overall results do not indicate significant differences among the three groups.

The Embree/Butler scoring system served as criterion for ascertaining brain dysfunction on the protocols of 100 subjects--50 had been diagnosed by health professionals as having brain dysfunction, and 50 had been diagnosed as having no brain dysfunction. In comparing the hospital's diagnoses with those of the Embree/Butler method, the data strongly supported the hypothesis that the Embree/Butler scoring system did effectively discriminate (chi square of 77.99 < .01) between those with organic brain syndrome (or cerebral dysfunction) and those with psychiatric classification. A point-biserial correlation was used to distinguish the relationship between diagnosis and the score. A cutoff score of above 14 produced the least false-negative or false-positive evaluations.

The Interpersonal Communication Inventory, a self-report instrument for assessing social skills, was given to undergraduate college students to determine its reliability. Following this administration, other small groups of undergraduates were asked to complete an attraction scale, the Interpersonal Communication Inventory, an assertiveness scale, and a sociometric questionnaire. Results confirmed the Inventory as a reliable instrument, but a stepwise multiple linear regression did not support the hypothesis that the Inventory was a useful predictor of sociometric choice. In addition, Pearson product moment correlations between the Inventory and an assertiveness scale did not confirm the prediction that the two instruments would measure behaviors from different response classes. Definite conclusions could not be stated due to lack of validity data for the Inventory and possible confounding variables.

This oral interpretation thesis analyzes the impact that three poets from Black Mountain College had on contemporary American poetry. The study concentrates on the lives, works, poetic theories of Charles Olson, Robert Creeley, and Robert Duncan and culminates in a lecture recital compiled from historical data relating to Black Mountain College and to the three prominent poets.

Thesis providing "a chronological account of the years 1929-1933 in the Baytown area [... which] centers on the social attitudes toward poverty, business, labor and welfare of the Baytown area during the Great Depression" (p. vii).

Stability of the macrobenthic community in a regulated section of the Brazos River, Texas, was evaluated. Physicochemical data and information on spatial distribution of macrobenthos were collected. Populations of two invertebrate species, Isonychia sicca and Neoperla clymene, had been greatly reduced since 1970-71 and I. sicca had been practically eliminated from this section of the Brazos. Three other insect populations, Choroterpes mexicanus, Cheumatopsche campyla and Cheumatopsyche lasia, had more than doubled their numbers since the 1970-71 study. A physicochemical gradient existed in this regulated section of the Brazos but it appeared to have changed little in comparison of earlier chemical data. A gradation of the macrobenthic community was evident as distance from the dam increased,

This paper investigates Henri Murger's novel, Scenes de la Vie de Bohème, as a model for the opera composed by Giacomo Puccini La Bohème. Colleen Hughes Mallette discusses the historical background of the works and examines the music and story.

Thesis studies the music and content of the opera La Traviata, focuses on the evolution of its heroine, Violetta Valéry. Carolyn Sue Finley traces the history behind the story and its reflection in the music.