Library: Best sellers

Pyrene, a four-ring polycyclic aromatic hydrocarbon (PAH), was identified as the chemical that requires the largest land area for soil bioremediation due to the slow rate of biodegradation at the Libby, Montana Superfund site. Prepared bed land treatment is the specific bioremediation technology that is currently employed at this site. Although bioremediation has been widely accepted for treatment of contaminated soil due to its low cost, the effective application of bioremediation is often hindered by the lack of information related to: 1) biochemical pathways, 2) enzymatic mechanisms, and 3)...

This study examines U.S.-Mexico sugar trade with special attention given to the impact of changes in trade and market environments caused by implementation of the North American Free Trade Agreement (NAFTA) and the introduction of high fructose corn syrup (HFCS). These two factors contributed to shaping sugar markets in the United States and Mexico as well as sugar trade between the two countries. The study includes two sections: (1) a description of the sugar markets from an historic point of view and (2) an empirical study forecasting the market and trade outlook. In section one, characteri...

This dissertation examines the phonological patterning as well as phonetic characteristics of transparent vowels in Hungarian palatal vowel harmony. Traditionally, these vowels are assumed to be excluded from participating in harmony alternations. The experimental data presented in this dissertation run contrary to this assumption. The data show that transparent vowels in Hungarian are articulated differently depending on the harmonic domain in which they occur. Based on this observation, the central claim defended and formalized in this dissertation is that continuous phonetic details of all ...

Infertility affects more than 3 million married couples in the United States. This study explored the use of Traditional Chinese Medicine (TCM) for treating female infertility. Surveys queried allopathic practitioners and TCM practitioners regarding their perceived knowledge and use of TCM. The vast majority of allopathic practitioners referred patients to acupuncturists and believed that acupuncture helped patients. The majority of respondents identified a trend for treating female infertility with TCM and Western medical procedures. The majority of respondents supported the concurrent use of...

The issues of trust and job satisfaction have taken on a greater strategic importance in organizations since the post-Enron scandal. Without trust or the lack of it among organizational members and between management and employees, organizational communication, knowledge management, organizational performance, and involvement may tend to close down. Trust has been identified as a crucial ingredient for organizational effectiveness. A linkage between trust and job satisfaction in private organizations has been established by researchers; however, in the U.S. federal government, the linkage betw...

A major failure of the juvenile justice system is to provide youth with career development skills that will ensure their successful entry into the workforce and reduce recidivism. This study had two purposes, which were to first examine the impact of career development on the formation of mature attitudes and competencies for realistic career decision-making for incarcerated youthful offenders, and second to determine the likelihood of gaining employment and the probability of recidivism for this population from participation in career development. A random sample (N = 50) was selected f...

We examine the census of star-forming galaxies and their extinction properties at redshift z~2, when a large fraction of the stellar mass in the universe formed. We find a good agreement between the X-ray, radio, and de-reddened UV estimates of the average star formation rate (SFR) for our sample of z~2 galaxies of ~50 Msun/yr, indicating that the locally calibrated SFR relations appear to be statistically valid from redshifts 1.5<z<3.0. Spitzer MIPS data are used to assess the extinction properties of individual star-forming galaxies, and we find that the rest-frame UV slope of most...

Anaerobic digestion is the most widely process used for the stabilisation of wastewater treatment sludge. Organic matter is transformed into CH4 and CO2 by the action of different bacteria groups. The main advantages are the reduction of the volume of waste sludge and the production of methane gas that can be utilized as energy supply for the process. During anaerobic digestion of activated sludge from enhanced biological phosphorus removal process (EBPR-process), most of the phosphorus eliminated during the water treatment, as well as that from cellular lysis, is released. So that, phosphorus...

In recent years, due to expanding populations and industries, regulatory authorities have imposed tighter discharge limits on nutrients from wastewater treatment facilities to avoid eutrophication in water streams. Common methods, such as metal salt precipitation, are being used to lower phosphorus concentrations which are a main contribution. However, alternate phosphorus removal techniques, such as phosphorus crystallisation, can provide further benefits. Precipitated solid can be utilised as a marketable fertiliser. Principles of magnesium and ammonia phosphate precipitation, working with a...

This study describes data that was gathered in 2004 from fieldwork conducted by students from four schools in Singapore, around tasks of wayfinding and debate. The fieldwork tasks were designed specifically to permit participants to exercise their powers of observation, as opposed to more traditional tasks of collection of empirical data. To this end, the study was constructed such that students were given opportunities to collaboratively explore and navigate unfamiliar environments using text- and picture-messaging, as well as to engage in debate, and use multimedia evidence recorded in the ...