The cover image is based on the Original Article Noninvasive prenatal paternity testing by means of SNP-based targeted sequencing by Jacqueline Chor Wing Tam et al., https://doi.org/10.1002/pd.5595 .
For investigating the relationship between thermal properties and biodegradability of poly (3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV), several films of PHBV containing different polyhydroxyvalerate (HV) fractions were subjected to
degradation in different conditions for up to 49 days. Differential scanning calorimetry (DSC), thermogravimetry (TG), specimen
weight loss and scanning electron microscopy (SEM) were performed to characterize the thermal properties and enzymatic biodegradability
of PHBV. The experimental results suggest that the degradation rates of PHBV films increase with decreasing crystallinity;
the degradability of PHBV occurring from the surface is very significant under enzymatic hydrolysis; the crystallinity of
PHBV decreased with the increase of HV fraction in PHBV; and no decrease in molecular weight was observed in the partially-degraded
polymer. 相似文献
This is the second paper of two companion papers presenting the results of laboratory bench-scale experimental studies on
electrokinetic extraction of lead from two different kaolinites. The theoretical formulation and numerical simulation of the
process are presented in the first paper. Two different kaolinites were used in the study: (1) Georgia kaolinite and (2) Milwhite
kaolinite. The lead spiked in Georgia kaolinite was highly mobilized and effectively extracted by the technique as the pH
in the soil was significantly lowered by the electrokinetic process. Milwhite kaolinite has a much higher acid/base buffer
capacity, and the required acidic environment could not be developed. As a result, removal of the lead spiked in Milwhite
kaolinite was minimal. Comparison between simulations and experimental results is also presented. Factors affecting the cleanup
efficiency of the process and potential enhancement techniques are also discussed. 相似文献
