Polyhydroxyalkanoates (PHAs) are a unique class of polyesters especially due to their chemical diversity imparted by side-chain substituent that provides handle tune properties, such as their...

In this work, we investigate which countries have been more central during Phases I and II of the European Emission Trading Scheme (EU ETS) with respect to the different types of accounts operating in the system. We borrow a set of centrality measures from Network Theory’s tools to describe how the structure of the system has evolved over time and to identify which countries have been in the co...

Biodegradable nanofibers are expected to be promising scaffold materials for biomedical engineering, however, biomedical applications require control of the degradation behavior and tissue response of nanofiber scaffolds in vivo. For this purpose, electrospun nanofibers of poly(hydroxyalkanoate)s (PHAs) and poly(lactide)s (PLAs) were subjected to degradation tests in vitro and in vivo. In this ...

Polyhydroxybutyrate (PHB) synthases catalyze the polymerization of 3-(R)-hydroxybutyrate coenzyme A (HBCoA) to produce polyoxoesters of 1−2 MDa. A substrate analogue HBCH2CoA, in which the S in HBCoA is replaced with a CH2 group, was synthesized in 13 steps using a chemoenzymatic approach in a 7.5% overall yield. Kinetic studies reveal it is a competitive inhibitor of a class I and a class III ...

Amongst the polyhydroxyalkanoate (PHA) family, the class of medium-chain-length PHA ( mcl-PHA) that contains C6 to C14 monomers has attracted a lot of attention due to its extraordinary diversity. In particular, the possibility to adjust material properties by controlling the monomeric composition, and functionalize it via introduction of vinyl groups is of great interest1. Whereas short-chain-...

phas, L. Remusat, J.H. Chen, J. Stodolna, M. Roskosz, Y. Guan, J.M. Eiler, D.A. Papanastassiou, Department of the Geophysical Sciences and Enrico Fermi Institute, The University of Chicago, USA ([email protected]), Division of Geological and Planetary Sciences, Caltech, USA, Museum National d'Histoire Naturelle, Paris, France, Science Division, Jet Propulsion Laboratory, USA, Université des ...

Although the hazards of exposure to tobacco smoke are well established, and laws mandating smoke-free indoor air are widespread, private homes have long been considered spaces beyond the legitimate reach of regulation. Reflecting this view, the federal government has not required public-housing units to be smoke-free. Historically, the Department of Housing and Urban Development (HUD) has maint...

In light of the current concerns about environmental issues caused by excessive use fossil resources, more emphasis has been paid to transition a sustainable and circular economy. Bioplastics as eco-friendly products originating from biomass wastes have gained much attention solve problem plastic pollution. Among them, polyhydroxyalkanoates (PHAs) are microbial polyesters produced using various...

A gas chromatography-mass spectrometry method for quantification of polyhydroxyalkanoates (PHAs), containing 4-carbon to 16-carbon monomers, even in the absence of standards, was developed. Strong linear correlations existed between PHA carbon number and retention time/response factor (R(2) ≥ 0.987). Based on the correlations, high recovery values, between 100.5% and 114.3%, were obtained for P...