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Roles Of Oxygen And Photoinduced Acidification In The Light-Dependent Antiviral Activity Of Hypocrellin A, Michael J. Fehr, S. L. Carpenter, Yvonne Wannemuehler, Jacob W. Petrich Dec 1995

Roles Of Oxygen And Photoinduced Acidification In The Light-Dependent Antiviral Activity Of Hypocrellin A, Michael J. Fehr, S. L. Carpenter, Yvonne Wannemuehler, Jacob W. Petrich

Chemistry Publications

Hypocrellin A displays photoinduced antiviral activity, in particular against the human immunodeficiency virus (HIV), as does its counterpart, hypericin. Although hypocrellin A, like hypericin, executes an excited-state intramolecular proton transfer, it differs from hypericin in two important ways. Unlike hypericin, hypocrellin A absolutely requires oxygen for its antiviral activity. Also, whereas we have previously demonstrated that hypericin functions as a light-induced proton source, we do not observe that hypocrellin A acidifies its surrounding medium in the presence of light. These results are discussed in the context of the ground- and excited-state photophysics of hypericin and its mechanisms of photoinduced virucidal ...


Safe Farm: The Worker Protection Standard: Rules To Improve Pesticide Safety, Wendy Wintersteen, Joyce Hornstein, Laura J. Miller Sep 1995

Safe Farm: The Worker Protection Standard: Rules To Improve Pesticide Safety, Wendy Wintersteen, Joyce Hornstein, Laura J. Miller

Agriculture and Environment Extension Publications

Learn how the Environmental Protection Agency's Worker Protection Standard applies to farmers.


Factors Related To Early Interest In Vasectomy As A Family Planning Method In Kenya: Instrument Design, Validation, And Causal Modeling , Abel Gitau Mugenda Jan 1995

Factors Related To Early Interest In Vasectomy As A Family Planning Method In Kenya: Instrument Design, Validation, And Causal Modeling , Abel Gitau Mugenda

Retrospective Theses and Dissertations

The purposes of the study were to: (1) describe male students awareness of family planning methods, (2) describe their sources of family planning information, (3) describe their knowledge of, attitude towards, and interest in vasectomy, and (4) use factor analysis and structural equation modeling to test a statistical model of factors that influence interest in vasectomy as a family planning method. The study was based on the theory of diffusion of innovations in which awareness and knowledge of an innovation influence attitude towards the innovation, and attitude influences intentions to use the innovation;A random sample of 430 undergraduate students ...


Community Assessment Of The Barriers To Primary Health Care For Children And Families , Karen Glisczinski Shirer Jan 1995

Community Assessment Of The Barriers To Primary Health Care For Children And Families , Karen Glisczinski Shirer

Retrospective Theses and Dissertations

The purpose of this study was to conduct a community assessment to determine the barriers to accessing primary health care for children in Chickasaw County, Iowa. Bronfenbrenner's (1986) ecological perspective on the interaction between the family and the environment was adapted to explain the barriers to health care. Based on this framework, barriers to preventive services, prenatal care, well-child care, immunizations, and health education were identified;Data were collected in two phases. First, existing data about the county's population, families, income and poverty, and child health were compiled into a health and social indicator profile. Second, a consumer ...