The effect of radioactive substances on sludge digestion

Bibliography: p. 40

A Comparative Study of Social Behavior of Children: Kindergarten Through Grade Three as Identified by Teacher Rankings, the California Test of Personality and the Hewett Teacher Rating Scale

The purpose of this study was to investigate the soundness of teacher rankings and ratings. This investigation was made by comparing teacher rankings, the Hewett Teacher Rating Scale and the California Test of Personality. To this end the major purposes of this study were: 1. to determine the relationship that exists between teacher ranking of children in three areas of social behavior: socially adjusted behavior, antisocial behavior, and withdrawn behavior and scores of the child on the related subsections of the California Test of Personality. to determine the relationship that exists between the teacher ranking of children on the above three areas of social behavior and the teacher ratings of the child on individual items of the Hewett Teacher Rating Scale. Procedure The research population consisted of 882 students. Of the research population 687 were identified by the thirty teachers in the study as being in the upper twenty-seven per cent or the lower twenty-seven per cent of the teacher rankings. Teachers ranked their children in three categories of social behavior. The three categories used were: socially adjusted behavior, antisocial behavior, and withdrawn behavior. Statistical procedure used included multiple correlation and stepwise backward elimination. Categorical predictors included, teacher ranking of socially adjusted behavior, teacher ranking of antisocial behavior, and teacher ranking of withdrawn behavior. Results and Conclusions 1. Teachers are able to recognize children that manifest socially adjusted behavior.2. A high degree of relationship can be ascertained between socially adjusted behavior, academic achievement, and individual items of the Hewett Teacher Rating Scale.3. Teachers have some difficulties in discriminating between “antisocial behavior and withdrawn behavior

Quality of surface water in Illinois, 1966-1971

Continues the work by R. H. Harmeson and T. E. Larson published in 1969.Enumeration continues from preceding title

Quality of surface water in Illinois, 1956-1966

Bibliography: p. 184.Enumeration continues from preceding title

Artificial ground-water recharge at Peoria, Illinois

Bibliography: p.47-48.Enumeration continues from preceding title

Temperatures of surface waters in Illinois

Includes bibliographical references (p. 8).Enumeration continues through succeeding title

The effects of halogenated compounds on the anaerobic digestion of macroalgae

The urgent need to replace fossil fuels has seen macroalgae advancing as a potential feedstock for anaerobic digestion. The natural methane productivity (dry weight per hectare) of seaweeds is greater than in many terrestrial plant systems. As part of their defence systems, seaweeds, unlike terrestrial plants, produce a range of halogenated secondary metabolites, especially chlorinated and brominated compounds. Some orders of brown seaweeds also accumulate iodine, up to 1.2% of their dry weight. Fluorine remains rather unusual within the chemical structure. Halogenated hydrocarbons have moderate to high toxicities. In addition, halogenated organic compounds constitute a large group of environmental chemicals due to their extensive use in industry and agriculture. In recent years, concerns over the environmental fate and release of these halogenated organic compounds have resulted in research into their biodegradation and the evidence emerging shows that many of these compounds are more easily degraded under strictly anaerobic conditions compared to aerobic biodegradation. Biosorption via seaweed has become an alternative to the existing technologies in removing these pollutants. Halogenated compounds are known inhibitors of methane production from ruminants and humanmade anaerobic digesters. The focus of this paper is reviewing the available information on the effects of halogenated organic compounds on anaerobic digestion

Sampling Frequency for Water Quality Monitoring

published or submitted for publicationis peer reviewedOpe