Analysis of high-molecular weight polyethylene glycol degradation by Pseudomonas sp.

IF 6.3 2区化学 Q1 POLYMER SCIENCE Polymer Degradation and Stability Pub Date : 2025-02-01 DOI:10.1016/j.polymdegradstab.2024.111144

M. Geisler , J. Khan , T. Heine , M.B. Ansorge-Schumacher , J. Thiele , A. Kaufmann

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引用次数: 0

Abstract

Polyethylene glycol (PEG) has widespread applications in pharmacy, medicine, and cosmetics, but its biological degradation is not completely understood, especially because of the complex analytics required for determining changes in molar mass and side or end groups, respectively. Here, we describe the activity of Pseudomonas sp. on PEG with molar masses of 6,000, 20,000 and 40,000 g mol⁻¹. The molar mass distribution after degradation was analyzed by size-exclusion chromatography (SEC) with different detection methods as well as matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF MS), and the differences between the results demonstrated. Further, the influence of the complex bacterial cultivation medium on analysis results was discussed. MALDI-TOF MS analysis revealed hydroxyethylene end-units on the PEG-terminus after bacterial degradation providing hints on the bacterial degradation pathway via end-unit scissioning followed by oxidation of the cleaved unit.

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来源期刊

Polymer Degradation and Stability 化学-高分子科学

CiteScore

10.10

自引率

10.20%

发文量

325

审稿时长

23 days

期刊介绍： Polymer Degradation and Stability deals with the degradation reactions and their control which are a major preoccupation of practitioners of the many and diverse aspects of modern polymer technology. Deteriorative reactions occur during processing, when polymers are subjected to heat, oxygen and mechanical stress, and during the useful life of the materials when oxygen and sunlight are the most important degradative agencies. In more specialised applications, degradation may be induced by high energy radiation, ozone, atmospheric pollutants, mechanical stress, biological action, hydrolysis and many other influences. The mechanisms of these reactions and stabilisation processes must be understood if the technology and application of polymers are to continue to advance. The reporting of investigations of this kind is therefore a major function of this journal. However there are also new developments in polymer technology in which degradation processes find positive applications. For example, photodegradable plastics are now available, the recycling of polymeric products will become increasingly important, degradation and combustion studies are involved in the definition of the fire hazards which are associated with polymeric materials and the microelectronics industry is vitally dependent upon polymer degradation in the manufacture of its circuitry. Polymer properties may also be improved by processes like curing and grafting, the chemistry of which can be closely related to that which causes physical deterioration in other circumstances.