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Full-Text Articles in Physical Sciences and Mathematics

Analysis Of Atmospheric Pahs In The Austrian Pine, Timothy Tomashuk, Triet Minh Truong, Audrey E. Mcgowin Ph.D. Jun 2009

Analysis Of Atmospheric Pahs In The Austrian Pine, Timothy Tomashuk, Triet Minh Truong, Audrey E. Mcgowin Ph.D.

Chemistry Student Publications

Polycyclic aromatic hydrocarbons (PAH) are a common pollutant created by natural (forest fires) or anthropogenic sources, such as incomplete combustion in engines (vehicular traffic) or incinerators. Many PAHs are known or suspected carcinogens and also have mutagenic properties and endocrine disrupting effects.

Although most atmospheric PAHs are measured using high-volume sample collection on filters, a convenient way of monitoring these pollutants is through plant matrices, such as pine needles that act as passive samplers. The needles are covered with a lipid-rich cuticle that absorbs the pollutants. Evergreens are especially useful because they continue to accumulate pollutants during the winter.

In …


Certain Pattern Recognition Tasks Using Genetic Programming., Durga Muni Dr. Apr 2009

Certain Pattern Recognition Tasks Using Genetic Programming., Durga Muni Dr.

Doctoral Theses

No abstract provided.


Changes In Producer Attitudes Towards Windbreaks In Eastern Nebraska, 1983 To 2009, Kim Tomczak Apr 2009

Changes In Producer Attitudes Towards Windbreaks In Eastern Nebraska, 1983 To 2009, Kim Tomczak

Department of Environmental Studies: Undergraduate Student Theses

Abstract Windbreaks are rows of trees or shrubs arranged on the landscape to reduce wind speed. In agricultural landscapes we find them as farmstead windbreaks, livestock windbreaks and field windbreaks. While farmstead and livestock windbreaks are well accepted by the agricultural community, field windbreaks are often viewed differently. A 1982 study of the attitudes of farmers in Eastern Nebraska indicated that many of the producers were around the age of 50 and that they used different types of windbreaks. This study repeated that survey in the same. When compared to data from 1982, farmers today are not educated about the …


Evaluating Hazelnut Cultivars For Yield, Quality And Disease Resistance, Sam Tobin Apr 2009

Evaluating Hazelnut Cultivars For Yield, Quality And Disease Resistance, Sam Tobin

Department of Environmental Studies: Undergraduate Student Theses

ABSTRACT This long term study focuses on testing various hazelnut cultivars for yield, nut quality and disease resistance. There are various cultivars that are being tested for these desired traits but only the Grand Traverse and Skinner will be applicable for the results of this localized study. The desired traits of commercial nut production are best matched by these two cultivars. Results from previous harvests will be used to draw trends to recommend commercially functional cultivars in Eastern Nebraska.