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Anoxygenic photosynthetic communities and heavy element transformations in extreme environments: hydrothermal and hypersaline ecosystemsCsotonyi, Julius Thomas 20 January 2011 (has links)
The current research project investigated the anoxygenic phototrophic and metal(loid) transforming bacteria of hypersaline and deep ocean hydrothermal environments. The East German Creek brine springs, an unusual flowing hypersaline system, was enumerated using classical techniques. Subterranean sulfide supported purple sulfur and nonsulfur bacteria, but at the highly oxygenated surface, aerobic anoxygenic phototrophs (AAP) were numerically dominant (up to 16-36% of cultivable bacteria). Strains (EG8, EG13, EG17, EG19) with unusual phylogenetic affiliation and novel photosynthetic and metal(loid) reducing traits were described taxonomically. Chromocurvus halotolerans gen. nov., sp. nov. was proposed as a second example of a gammaproteobacterial AAP. It exhibited bent rod-shaped cells, unusual among AAP. Facultatively anaerobic Charonomicrobium ambiphototrophicum gen. nov., sp. nov. was capable of both aerobic and anaerobic anoxygenic photosynthesis, and incapable of photoautotrophy, distinguishing it from both AAP and purple nonsulfur bacteria. Roseovarius vanadiphilum sp. nov. surprisingly produced 4.5 times more biomass and 2 times more bacteriochlorophyll (BChl) at extremely high NaVO3 concentration (7.5 g/l) than in metal-free medium.
A second novel metabolic mode, anaerobic respiration on the toxic metalloid tellurate, was described for a relative of non-phototrophic Shewanella frigidimarina (ER-Te-48), from deep ocean hydrothermal vent Paralvinella worms at Explorer Ridge in the Pacific Ocean. Other strains respired on SeO32- (ER-Se-17L), VO3- (ER-V-6), and VO43- (AV-V-25). These organisms provided the first examples of anaerobic respiration on Te, Se and V at hydrothermal vents.
High level resistance of AAP to metal(loid)s prompted investigation of the influence of TeO32- on photosynthetic pigment production in species including Erythromicrobium ramosum (from a terrestrial hydrothermal system) and Erythrobacter litoralis (from a hypersaline supralittoral system). Tellurite enhanced photosynthetic pigment production up to 3.4 times, consistent with an antioxidant carotenoid-based defense mechanism. However, in E. litoralis BChl precursors such as Mg protoporphyrin or its monomethyl ester also accumulated, indicating biosynthetic pathway interruption.
In hydrothermal and hypersaline ecosystems, largely devoid of eukaryotic phototrophs but often enriched in metal(loid)s, AAP and metal(loid) reducers are key modulators of nutrient and toxin availability. The presented results on their ecology, physiology and biochemistry have important implications for theoretical understanding of extreme environments and hold potential for biotechnological applications.
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"Soldiers for Christ"Clay, Karlton Tyrone 08 August 2008 (has links)
Master Evil plans to rule the earth and set up his evil empire so that all may worship and adore him. However, six teenagers discover six crosses that have powers that will help them defeat the evil that will soon cross their path. Each cross possesses a quality of God that each of these teenagers must develop in order to stop Master Evil: faith, peace, salvation, truth, righteousness, and the Spirit. These six teenagers pose as a threat to Master Evil's plans, and he'll stop at nothing to defeat them and rule the world. It is the ultimate battle between good and evil. These six young people must have faith themselves and each other, but most importantly, they must have faith in God in order to defeat the ultimate evil.
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Anoxygenic photosynthetic communities and heavy element transformations in extreme environments: hydrothermal and hypersaline ecosystemsCsotonyi, Julius Thomas 20 January 2011 (has links)
The current research project investigated the anoxygenic phototrophic and metal(loid) transforming bacteria of hypersaline and deep ocean hydrothermal environments. The East German Creek brine springs, an unusual flowing hypersaline system, was enumerated using classical techniques. Subterranean sulfide supported purple sulfur and nonsulfur bacteria, but at the highly oxygenated surface, aerobic anoxygenic phototrophs (AAP) were numerically dominant (up to 16-36% of cultivable bacteria). Strains (EG8, EG13, EG17, EG19) with unusual phylogenetic affiliation and novel photosynthetic and metal(loid) reducing traits were described taxonomically. Chromocurvus halotolerans gen. nov., sp. nov. was proposed as a second example of a gammaproteobacterial AAP. It exhibited bent rod-shaped cells, unusual among AAP. Facultatively anaerobic Charonomicrobium ambiphototrophicum gen. nov., sp. nov. was capable of both aerobic and anaerobic anoxygenic photosynthesis, and incapable of photoautotrophy, distinguishing it from both AAP and purple nonsulfur bacteria. Roseovarius vanadiphilum sp. nov. surprisingly produced 4.5 times more biomass and 2 times more bacteriochlorophyll (BChl) at extremely high NaVO3 concentration (7.5 g/l) than in metal-free medium.
A second novel metabolic mode, anaerobic respiration on the toxic metalloid tellurate, was described for a relative of non-phototrophic Shewanella frigidimarina (ER-Te-48), from deep ocean hydrothermal vent Paralvinella worms at Explorer Ridge in the Pacific Ocean. Other strains respired on SeO32- (ER-Se-17L), VO3- (ER-V-6), and VO43- (AV-V-25). These organisms provided the first examples of anaerobic respiration on Te, Se and V at hydrothermal vents.
High level resistance of AAP to metal(loid)s prompted investigation of the influence of TeO32- on photosynthetic pigment production in species including Erythromicrobium ramosum (from a terrestrial hydrothermal system) and Erythrobacter litoralis (from a hypersaline supralittoral system). Tellurite enhanced photosynthetic pigment production up to 3.4 times, consistent with an antioxidant carotenoid-based defense mechanism. However, in E. litoralis BChl precursors such as Mg protoporphyrin or its monomethyl ester also accumulated, indicating biosynthetic pathway interruption.
In hydrothermal and hypersaline ecosystems, largely devoid of eukaryotic phototrophs but often enriched in metal(loid)s, AAP and metal(loid) reducers are key modulators of nutrient and toxin availability. The presented results on their ecology, physiology and biochemistry have important implications for theoretical understanding of extreme environments and hold potential for biotechnological applications.
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Metabolic Engineering to Improve Biohydrogen Production by Rhodobacter capsulatus JP91Sherteel, Rajaa 04 1900 (has links)
No description available.
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The subaltern `speaks': agency in Neshani Andreas' The purple violet of OshaantuRhode, Aletta Cornelia 30 November 2003 (has links)
This dissertation critically evaluates the issue of the `silencing' of the subaltern woman in the 1988 version of Gayatri Spivak's essay `Can the Subaltern Speak?' The conclusions reached are then related to the novel The Purple Violet of Oshaantu by the Namibian woman writer Neshani Andreas. Chapter 1 deals with the essay `Can the Subaltern Speak?' and the `silenced' subaltern woman, examining both Spivak's theory on this issue as well as criticism of this theory by different postcolonial theorists. Chapter 2 presents aspects of both the creative and political practice of women, specifically the woman writer, in certain countries in Africa. Chapter 3 deals with the novel The Purple Violet of Oshaantu by Neshani Andreas and explores issues like the `silencing' of the subaltern women in the novel, opposition to patriarchal oppression and the engendering of agency by both the writer and the characters in the novel. / English Studies / M. A. (English)
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Purpurové řeky Matematické modelování výkonnosti podniku / Purple Rivers The Math Modelling in the Use of the Increasing Efficiency of the EnterprisePopelková, Ilona January 2008 (has links)
This master's thesis discourse the proposal of the strategy of increasing efficiency of the enterprise. It includes the analysis of the present efficiency level of the company and also a file of math-economical issues, like the riverbed of interconnected flows, whose correct modelling will improve the current entrepreneurial situation.
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Ztraceno v překladu: Problematika překladu afroamerického dialektu do češtiny / Lost in Translation: Challenges of Translating the African American Vernacular into the Czech SpaceHorká, Natálie January 2021 (has links)
dialect is introduced. Toni Morrison's ce Walker's analyse the way in which Michael Žantovsk Nejmodřejší oči ) and Jiří The thesis is concluded with a part that focuses on Zora Neale Hurston's The novel's language is analysed compared to the novels by Walker and Morrison, and the analysis presents specifics of Hurston's portrayal of African American ejich oči
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Bookish Women: Examining the Textual and Embodied Construction of Scholarly and Literary Women in American MusicalsHammonds, Rebecca K. 07 August 2019 (has links)
No description available.
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From Haunting the Code to Queer Ambiguity: Historical Shifts in Adapting Lesbian Narratives from Paper to FilmBernsmeier, Jordan January 2013 (has links)
No description available.
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A System of Aesthetics: Emily Dickinson's Civil War PoetryKaufman, Amanda Christine January 2010 (has links)
No description available.
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