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No description available.

No description available.

No description available.

Nitrogen removal from wastewater is important for the revention of significant health and environmental impacts such as eutrophication. Nitrogen removal is achieved by the combined action of nitrification and denitrification. Nitrification is performed by autotrophic, slow growing microorganisms that require oxygen and are inhibited in the presence of denitrifiers when oxygen and COD are available due to competition for oxygen. Denitrification however, performed by relatively fast growing heterotrophic bacteria, is inhibited by oxygen and requires COD. This implies that nitrification and denitrification are mutually exclusive. The supply of oxygen to a fresh wastewater, high in ammonia and COD, causes waste of both oxygen and COD. Conservation of COD is therefore critical to efficient wastewater treatment. The approach investigated in this study to achieve complete nitrogen removal was to physically separate the nitrification and denitrification biomasses into separate bioreactors, supplying each with appropriate conditions for growth and activity. A storage driven denitrification sequencing batch biofilm reactor (SDDR) was established which exhibited a high level of COD storage (up to 80% of influent COD) as poly-B-hydroxybutyrate capable of removing >99% of nitrogen from wastewaters with a C/N ratio of 4.7 kg COD/kg N–NO3 –. The SDDR was combined in sequential operation with a nitrification reactor to achieve complete nitrogen removal. The multiple stage, multiple biomass reactor was operated in sequence, with Phase 1 - COD storage in the storage driven denitrification biofilm; Phase 2 - ammonia oxidation in the nitrification reactor; and Phase 3 - nitrate reduction using the stored COD in the storage driven denitrification reactor. The overall rate of nitrogen removal observed was up to 1.1 mmole NH3 L–1 h–1 and >99% of nitrogen could be removed from wastewaters with a low C/N ratio of 3.9 kg COD/kg N–NH3. The multiple stage, multiple biomass system was limited in overall nitrogen removal the reduction in pH caused by nitrification. A parallel nitrification-denitrificatio (PND) reactor was developed in response to the pH control issue. The PND reactor was operated with Phase 1 – COD storage in the storage driven denitrification biofilm and Phase 2 – simultaneous circulation of reactor liquor between the denitrification and nitrification biofilms to achieve complete nitrogen removal and transfer of protons. The PND reactor performed competitively with the multistage reactor (removal of >99% nitrogen from wastewaters with feed ratios of 3.4 kg COD/kg N–NH3) without the need for addition of buffering material to oderate the pH.

The aim of this thesis was to gather an in-depth understanding of the changes in the role of the Roman father during the Middle Roman Republic by analyzing a play called The Adelphi by Terence. A literature review was conducted to highlight the divergent views on Roman and Greek education and fatherhood, and its application in Rome. When Rome came into contact with Greece in 241BC, controversy was sparked on how a Roman father should raise his sons. This conflict arose because Greek fathers tended to raise sons with kindness, fairness, and equity in contrast to the heavily traditional, stern, strict, and restrictive methods of Roman fathers. There was a recent debate among modern scholars on this topic; however, it has generally been agreed that the Roman father was no longer a cold and overcontrolling paternal figure in Middle Republic. Because of the scarcity of primary sources dating before the first century BCE, Terence's Adelphi is a valuable piece of evidence for understanding the 2nd Century BCE controversy that arose between those for and against all things Greek: philosophy, art, literature, mores, cultural norms and education. In his play, Terence contemplates this issue and concludes by presenting an ideal father as possessing a balance of both Roman conventional morals and paternal authority, and Greek kindness and fairness to foster affection and respect among family members. This is evident when the protagonist, the heavily traditional Roman father, Demea, initially having alienated his sons, changes his behaviour after adopting these Greek characteristics to earn back both his sons’ affection. The importance of this conclusion to the play suggests that Greek Philosophy and cultural mores began to influence Roman fatherhood and education as early as 160 BCE when the play was produced posthumously in Rome. More specifically, Terence’s play was one of the first social plays to impact Roman society by portraying an ideal image of a shofter, and gentler Roman father, who did not solely rely on the absolute power and control he possessed over his sons. Although there is primary evidence in literary works to support that the Adelphi continued to gain popularity in first century BCE with its Greek concepts of kindness, fairness, and equity in fatherhood and education, future archeological research of Roman family tombstones in Rome may further shed light on the issue concerning the extent to which Greek philosophy and mores influenced and impacted Roman society in the 2nd Century BCE.

­^¤åºK­n By the trend of Globalization and international marketing, it is impossible for us to neglect the different thoughts of marketing ethics among different countries and cultures. Therefore, the purpose of this research is to discuss the role of cultures in the marketing ethical decision-making procedure by using the concept of cross-cultures. Thus, the point of this research is in that when individuals face the dilemma of marketing ethics, the interactions of dilemma of moral intensity, personal moral philosophy and the differences of cultures will influence on individuals' perception, judgement and intention. In this research, We use the questionnaire as a tool to test the hypotheses and use back-translation technique to translate items between Chinese and English. Our samples are selected from Taiwan, American and France MBA students who have similar age and education background in order to lessen the interference of non-cultural factors. Besides, we will use the confirmatory statistics analysis to test the fit of these hypotheses. Findings: 1. We found that there will be a positive relationship among there stages of ethical decision-making under any cultural environment. 2. We found that moral density has a positive relationship with the procedure of ethical decision-making. 3. We found that there will have different relationships among moral philosophy and three stages of ethical decision-making in different countries. 4. we found that different cultures will play different roles in the ethical decision-making procedure. 5.We found that culture has no relationship with moral philosophy.

Texte remanié de: Th. doct.--Agron.--Montpellier--Centre international de hautes études agronomiques, 2002. / Bibliogr. p. 65-70. Résumé en français et en anglais.

Thèse d'exercice : Pharmacie : Nantes : 2007. / Bibliogr.