First Evidence of Environmental Formation of Sulfonated PCBs

Several types of metabolites can be produced from the environmental degradation of PCBs such as OH-PCBs, sulfated PCBs, methoxylated PCBs, and others. However, while sulfonated and OH-sulfonated PCBs were recently found in soil, little information is available on their formation and their environmental path. In this study, the environmental formation of OH-sulfonated and sulfonated PCBs was shown for the first time in treatments using eight PCB congeners as a carbon source in a flask experiment. Here, 10 environmental inocula from different sources were tested to evaluate, in a semiquantitative way, the formation of OH-sulfonated and sulfonated PCBs. OH-PCBs were also monitored, as they represent one of the first degradation steps of PCBs. All inocula could generate these metabolites, although the number of congeners varied greatly. In general, OH-PCBs and OH-sulfonated PCBs were produced at the highest concentrations. For sulfonated PCBs, the highest number of congeners was produced from an inoculum derived from plant leaves and from a PCB-contaminated site. The results show that OH-sulfonated and sulfonated PCBs can be environmentally formed by microbial inocula, even by the generalist ones, not specifically selected in PCB rich environments

Investigation of biologically active zeolite: role of colonization in the removal of 14C-labelled sulfamethoxazole in wastewater

Up-to-date approaches to remove micropollutants in wastewater treatment are based on adsorbing materials like activated carbon. These fossil-based materials can also provide a surface for microbial colonization, which could further improve the removal of MPs. As zeolite filters have shown interesting performance in the removal of MPs in previous works, this study aimed to investigate the effect of microbial colonization on such filters on the elimination of 14C-labelled sulfamethoxazole (SMX), an antibiotic from the class of sulfonamides. Lab scale removal tests were set in 100 mL reactors and monitored for 150 days at room temperature. Taxa known to be linked to organic pollutant degradation (Caulobacterales, Rhizobiales, Burkholderiales) were found among the microbial community attached to the zeolite. Bacterial colonization of zeolite filters improved the removal of 14C-sulfamethoxazole by 35 % compared to the control. An analysis of the microbial community dynamics over time revealed the increased abundance of the Vicinamibacterales taxon after 50 days of contact with SMX. This order abundance, linked to degradation of sulfonamides, went from 0 to 17 %; and Shannon diversity ranged from 1.51 to 1.99. Data showed that zeolite filters as adsorbing material in wastewater treatment plants can improve MPs removal by supporting bacterial colonization, making it an interesting support that could synergize with biological activated carbon

Manipulating the Hype: contemporary art's response to media cliches

Manipulating the Hype addresses art’s reaction to the barrage of signs produced by the media. The paper researches contemporary art’s response to clichéd media stereotypes and elucidates artists’ multifaceted perspective on overtly obvious yet widely embraced paradigms marketed by the media. Contemporary art’s strategic reconfiguration of media stereotypes is a valuable introspection upon the superficiality and impracticability of advertising and entertainment industry constructs. By reconsidering the mediated image, art has the ability to inspire reevaluation of cultural values. The thesis additionally attempts to ascertain the reinterpretation of media stereotypes as a common thread linking principal art movements and historically significant artworks from around the world since 1960. How does contemporary art respond to the extensive cultural influence of the media? Is a reaction to mass media a thematic commonality linking contemporary artists in the age of globalization? Manipulating the Hype is a dual outcome investigation comprised of written thesis and studio practice. The written thesis combines experience from a lengthy professional practice with historical and theoretical research. The visual thesis consists of twelve photographic works taken at on the Big Island of Hawaii. The images juxtapose artificial icons of power from popular culture with the natural force of the active lava flow. The process of research discloses how the advertising and entertainment industries capitalize upon innate human desires through the manipulative proliferation of archetypal imagery. Furthermore, the thesis establishes the widespread retort to media clichés as a palpable commonality in studio practices worldwide. The findings in the research make evident that although contemporary art does not have sufficient influence to reform the media, it can heighten public awareness of media tactics

Nomenclatural Assessment Of Goniotrichum Kützing, Erythrotrichia Areschoug, Diconia Harvey, And Stylonema Reinsch (Rhodophyta)

Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/149711/1/tax03682.pd

The status of Agardhiella tenera and Agardhiella baileyi (Rhodophyta, Gigartinales)

Evidence is presented to support the placement of Agardhiella tenera in Solieria (as S. tenera comb. nov.) for the reason that a large fusion cell is present in the center of the cystocarp. Since A. tenera is the type species of the genus, Agardhiella S chmitz (1896) becomes a junior synonym of Solieria J. A gardh (1842). It is argued that A. baileyi , upon which the generic description of Agardhiella was based, is generically distinct from Solieria , and Neoagardhiella gen. nov. is proposed, with N. baileyi as the type species. Agardhiella ramosissima is also transferred into this new genus. The old observations of Solieria as a procarpial genus made by B ornet & T huret (1880) are reinforced by the present observations. This situation in the type genus of the family is contrasted with the nonprocarpial condition known in several other genera at present considered members of the Solieriaceae.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/42895/1/10750_2004_Article_BF00014259.pd