An expected formation of TCNM from chlorination of bisphenol A with ultrasonic pretreatment: A new nitrogen source for N-DBP from N2 in air

Endocrine disrupting compounds (EDCs), such as estrone (E1), estrodiol (E2), estriol (E3), 17α-Ethynylestradiol (EE2) and bisphenol A (BPA) were biodegraded byPseudomonas Putida. Under the fixed conditions of inoculums size and substrate concentration, the influences of enhanced conditions, such as carbon source, nitrogen source and ultrasonic power, had been investigated. The biodegradation rates of EDCs have increased by 16.98-40.15% and 18.37-24.86% after adding carbon source and nitrogen source, respectively. Ultrasonic power can improve the biodegradation rate by 14.09-24.66%. Meanwhile, the biodegradation rate could be up to about 90% under the external conditions. The study provided a basis for the enhance control of EDCs and other contaminants.

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Probing the Chemistry and Spectroscopy of Radiation-Sensitive Polymers by Parallel-Detection EELS

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010013376x ◽

1990 ◽

Vol 48 (2) ◽

pp. 34-35

Author(s):

E. G. Rightor ◽

G. P. Young

Keyword(s):

Electron Beam ◽

Bisphenol A ◽

Energy Loss ◽

Parallel Detection ◽

Commercial Grade ◽

Incident Electron Beam ◽

Ptfe Sample ◽

Spectroscopic Information ◽

Edge Features ◽

Electron Energy Loss

Investigation of neat polymers by TEM is often thwarted by their sensitivity to the incident electron beam, which also limits the usefulness of chemical and spectroscopic information available by electron energy loss spectroscopy (EELS) for these materials. However, parallel-detection EELS systems allow reduced radiation damage, due to their far greater efficiency, thereby promoting their use to obtain this information for polymers. This is evident in qualitative identification of beam sensitive components in polymer blends and detailed investigations of near-edge features of homopolymers.Spectra were obtained for a poly(bisphenol-A carbonate) (BPAC) blend containing poly(tetrafluoroethylene) (PTFE) using a parallel-EELS and a serial-EELS (Gatan 666, 607) for comparison. A series of homopolymers was also examined using parallel-EELS on a JEOL 2000FX TEM employing a LaB6 filament at 100 kV. Pure homopolymers were obtained from Scientific Polymer Products. The PTFE sample was commercial grade. Polymers were microtomed on a Reichert-Jung Ultracut E and placed on holey carbon grids.

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