The valorization of waste to valuable chemicals can contribute to a more resource-efficient and circular chemistry. In this regard, the selective degradation of end-of-life polymers/plastics to produce useful chemical building blocks can be a promising target. We have investigated the hydrogenative depolymerization of end-of-life poly(bisphenol A carbonate). Applying catalytic amounts of the commercial available Ruthenium-MACHO-BH complex the end-of-life polycarbonate was converted to bisphenol A and methanol. Importantly, bisphenol A can be reprocessed for the manufacture of new poly-(bisphenol A carbonate) and methanol can be utilized as energy storage material.
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http://dx.doi.org/10.1002/open.201900319 | DOI Listing |
Chemosphere
January 2025
Environment Research Institute, Shandong University, Qingdao, 266237, PR China.
Polyethylene terephthalate (PET) waste significantly contributes to the global plastic crisis, but enzymatic conversion has become an efficient and environmentally friendly strategy to combat it. Therefore, this study explored the Re-face selective depolymerization mechanisms of a novel PET-degradation peptidase, hydrolase 202. Theoretical calculations revealed that the first step, a catalytic triad-assisted nucleophilic attack, is the rate-determining step.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
School of Chemical Engineering, Northeast Electric Power University, 169 Changchun Road, Shipyard District, Jilin 132012, China.
Ethyl vanillate (EV) is an important component of flavors and fragrances and has been widely used in the food, pharmaceutical, and cosmetic industries. The highly selective preparation of EV from lignin, the most abundant monophenolic compound in nature, is a great challenge in the field of lignin depolymerization. In this study, the multi-active catalysts from alkaline ionic liquid and polyoxometalates were constructed, which were characterized by acidity, alkaline and oxidizing ability.
View Article and Find Full Text PDFInt J Biol Macromol
January 2025
College of Biosystems Engineering and Food Science, Key Laboratory for Quality Evaluation and Health Benefit of Agro-Products of Ministry of Agriculture and Rural Affairs, Key Laboratory for Quality and Safety Risk Assessment of Agro-Products Storage and Preservation of Ministry of Agriculture and Rural Affairs, Zhejiang University, Hangzhou 310058, China. Electronic address:
Quillaja saponins (QS), a natural amphiphilic food additive, have significant potential in modulating the properties of starchy products. However, a systematic understanding of this phenomenon and the underlying molecular mechanisms remains lacking. In this study, two-stage molecular dynamics (MD) simulations combined with multiple experimental approaches were employed to investigate the modulation of starch properties by QS through six chain dynamic behaviors.
View Article and Find Full Text PDFMar Drugs
December 2024
Jeju Bio Research Center, Korea Institute of Ocean Science and Technology (KIOST), Jeju-si 63349, Republic of Korea.
Green algae, particularly species, are rich in complex polysaccharides, such as ulvan, which have significant potential for biotechnological applications. However, the biochemical properties of ulvan depolymerised products remain underexplored. The enzymatic depolymerisation of ulvan has garnered attention owing to its cost advantages over alternative methods.
View Article and Find Full Text PDFWorld J Microbiol Biotechnol
December 2024
School of Pharmacy, Jiangsu University, Zhenjiang, 212013, PR China.
A heparinase III (NsHep-III) from Niabella sp. was identified, cloned, and expressed as soluble form in E. coli BL21 (DE3).
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