[Blueboard] Invitation for Knepper seminars, Friday, July 29, 10am, C109

Gina B. Mamauag gmamauag at ateneo.edu
Wed Jul 27 08:58:04 PHT 2016

You are cordially invited to the following Chemistry seminars:

*A. Analysis, Abundance and Degradation of Different Polymer Types in

*B. Investigation on the presence and behaviour of precursors to
perfluorinated compounds in the environment*

*Prof. Thomas Knepper*
*Fresenius Hochschule University of Applied Sciences*
*Idstein, Germany*

*C. Veterinary and Human Drugs: Pharmacology, Analysis and Relevance*

*Dr. Nicole Knepper*

*Date / Time: July 29, 2016 (Friday) 10:00 – 12:00 pm*
*Place: Schmitt Hall, C109*


*A. Analysis, Abundance and Degradation of Different Polymer Types in
Freshwater (Thomas Knepper)*

Synthetic polymers are one of the most significant pollutants in the
aquatic environment. Serious effects are expected from so-called
microplastics (particle size <5 mm) that are reported in all environmental
compartments. The small size of microplastics complicates their
determination in environmental samples compared to macroplastics and
demands for higher requirements regarding the analytical approaches.
Depending on the sampling compartment of the aquatic environment, the
application of different sampling methods and sample treatments, e.g.
separation of plastic particles and destruction of natural debris, is
necessary prior the identification of the plastic particles. Both,
analytical approaches for the sample preparation as well as the
microplastic identification is summarized in this chapter. Furthermore,
microplastics are no uniform analyte, as many different types of synthetic
polymers are commercially available and consequently, a variety of
different polymer types is present in the aquatic environment. The
identification of the polymer type in environmental samples provides
additional information for scientists: Along with their different chemical
and physical properties, the different polymer types distinguish by their
degradation. An important factor for the formation and accumulation of
microplastics in the aquatic system is their environmental degradation.

*B. Investigation on the presence and behaviour of precursors to
perfluorinated compounds in the environment (Thomas Knepper)*

Wastewater treatment plants (WWTPs) have been identified as a significant
pathway for the introduction perfluoroalkyl and polyfluoroalkyl substances
(PFASs) to natural waters. In several studies it was observed that the
concentration of certain PFASs were higher in the WWTP effluent compared to
the corresponding influent. One reason for this might be the
biotransformation of precursor substances, which were converted into known
and analysed PFASs. The objective of the present study was the
identification of potential precursor substances of persistent PFASs in
WWTPs. Several transformation products of fluorotelomer alcohols (FTOHs)
e.g. the unsaturated fluorotelomer carboxylic acids (FTUCAs), fluorotelomer
carboxylic acids (FTCAs) and the x:3-acids could be determined,
particularly in the aqueous phase of the industrial WWTPs. The further
biotransformation of these intermediates led to an increased concentration
of perfluoroalkyl carboxylic acids (PFCAs) in the effluent of WWTPs.

*C. Veterinary and Human Drugs: Pharmacology, Analysis and Relevance
(Nicole Knepper)*

This lecture will describe the pharmacology, metabolism, pharmacodynamics
and activities of drugs, with particular focus on antibiotics.

*Gina Mamauag-Buan*

*Chemistry Department*
*Ateneo de Manila University*
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