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Extraction of Organochlorine Pesticides from Plastic Pellets and Plastic Type Analysis
Špela Koren, Manca Kovač Viršek, Petra Makorič, Maryline Pflieger, 2017, review article

Abstract: Plastic resin pellets, categorized as microplastics (≤5 mm in diameter), are small granules that can be unintentionally released to the environment during manufacturing and transport. Because of their environmental persistence, they are widely distributed in the oceans and on beaches all over the world. They can act as a vector of potentially toxic organic compounds (e.g., polychlorinated biphenyls) and might consequently negatively affect marine organisms. Their possible impacts along the food chain are not yet well understood. In order to assess the hazards associated with the occurrence of plastic pellets in the marine environment, it is necessary to develop methodologies that allow for rapid determination of associated organic contaminant levels. The present protocol describes the different steps required for sampling resin pellets, analyzing adsorbed organochlorine pesticides (OCPs) and identifying the plastic type. The focus is on the extraction of OCPs from plastic pellets by means of a pressurized fluid extractor (PFE) and on the polymer chemical analysis applying Fourier Transform-InfraRed (FT-IR) spectroscopy. The developed methodology focuses on 11 OCPs and related compounds, including dichlorodiphenyltrichloroethane (DDT) and its two main metabolites, lindane and two production isomers, as well as the two biologically active isomers of technical endosulfan. This protocol constitutes a simple and rapid alternative to existing methodology for evaluating the concentration of organic contaminants adsorbed on plastic pieces.
Found in: osebi
Keywords: Environmental Sciences, Issue 125, Microplastics, resin pellets, pesticides, persistent organic pollutants, organochlorine pesticides, dichlorodiphenyltrichloroethane, endosulfan, hexachlorocyclohexane, lindane, Fourier transform infrared spectroscopy, pressurized fluid extractor
Published: 10.07.2017; Views: 2668; Downloads: 0

Histerija v diskurzu na Slovenskem do 1. svetovne vojne
Manca Koren, 2017, undergraduate thesis

Abstract: V diplomski nalogi je predstavljeno, kako se pojem histerija pojavlja v slovenskem diskurzu od prve najdene objave do prve svetovne vojne. V uvodnem delu so zapisane razlage besede histerija v Slovarju slovenskega knjižnega jezika, Etimološkem slovarju in Slovarju psihiatričnih izrazov. Sledi opis bolezni in največjih strokovnjakov, ki so se z njo ukvarjali (Jean-Marie Charcot in Sigmund Freud). V naslednjem poglavju je predstavljeno, kako so histerijo zdravili, dojemali in sprejemali v slovenskem prostoru. Nato je obravnavan pojav besede histerija in njenih izpeljank v strokovnem, publicističnem in literarnem diskurzu. Poglavje je sestavljeno iz različnih odlomkov iz teh besedil, ob katerih je razloženo, kako se histerija pojavlja v različnih kontekstih in pomenih.
Found in: osebi
Keywords: histerija, Jean-Marie Charcot, Sigmund Freud, histerija na Slovenskem, Josip Vošnjak, Zofka Kveder, Fran Govekar, Janko Kersnik, Vladimir Levstik, Pavlina Pajk, Adolf Robida
Published: 12.09.2017; Views: 3630; Downloads: 198
.pdf Fulltext (2,78 MB)

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