In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent den...In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent density of CTCF photoanode is 1.85 m A cm-2 at ＋1.23 V vs. reversible hydrogen electrode（RHE）, which is more than 20 times higher than that of pristine α-Fe2O3 photoanode（0.08 m A cm-2）. The incident-photo-to-current conversion efficiency, applied bias photo-to-current efficiency and transfer efficiency of CTCF photoanode reaches 31.2% at 380 nm（＋1.23 V vs. RHE）,0.11%（＋1.11 V vs. RHE）, 68.2%（＋1.23 V vs. RHE） respectively, which are much higher than those of pristine α-Fe2O3 photoanode. Additionally, the longtime irradiation PEC water splitting of CTCF photoanode demonstrates its high stability at extreme voltage in NaOH（pH 14）.展开更多
Penicillin-binding proteins（PBPs） are the target of β-lactam antibiotics（the major treatment for Streptococcus pneumoniae infections）,and mutations in PBPs are considered as a primary mechanism for the developmen...Penicillin-binding proteins（PBPs） are the target of β-lactam antibiotics（the major treatment for Streptococcus pneumoniae infections）,and mutations in PBPs are considered as a primary mechanism for the development of β-lactam resistance in S.pneumoniae.This study was conducted to investigate the mutations in the PBPs of clinical S.pneumoniae isolates in Hangzhou,China,in correlation with β-lactam resistance.Results showed that 19 F was the predominant serotype（7/27） and 14 of the S.pneumoniae isolates were resistant to both penicillin G and cephalosporin.Genotyping results suggested that β-lactam-resistant isolates primarily exhibited single-site mutations in both the STMK and SRNVP motifs of pbp1 a in combination with double-site mutations in the STMK motif of pbp2 x,which might be the primary mechanisms underlying the β-lactam resistance of the isolates in this study.展开更多
基金preliminarily supported by the National Natural Science Foundation of China (21706295, 51772135 and 21376104)the Natural Science Foundation of Guangdong Province (2017A030313055 and 2014A030306010Jinan University (11617326 and 88017418)
文摘In this work, we demonstrate the CoOOH/（Ti,C）-Fe2O3（CTCF） nanorods prepared by a facile approach as well as their implementation as photoanodes for photoelectrochemical（PEC） water splitting. The photocurrent density of CTCF photoanode is 1.85 m A cm-2 at ＋1.23 V vs. reversible hydrogen electrode（RHE）, which is more than 20 times higher than that of pristine α-Fe2O3 photoanode（0.08 m A cm-2）. The incident-photo-to-current conversion efficiency, applied bias photo-to-current efficiency and transfer efficiency of CTCF photoanode reaches 31.2% at 380 nm（＋1.23 V vs. RHE）,0.11%（＋1.11 V vs. RHE）, 68.2%（＋1.23 V vs. RHE） respectively, which are much higher than those of pristine α-Fe2O3 photoanode. Additionally, the longtime irradiation PEC water splitting of CTCF photoanode demonstrates its high stability at extreme voltage in NaOH（pH 14）.
基金supported by Grants from the National Natural Sciences Foundation of China[81772232]Zhejiang Provincial Program for the Cultivation of High-level Innovative Health Talents
文摘Penicillin-binding proteins（PBPs） are the target of β-lactam antibiotics（the major treatment for Streptococcus pneumoniae infections）,and mutations in PBPs are considered as a primary mechanism for the development of β-lactam resistance in S.pneumoniae.This study was conducted to investigate the mutations in the PBPs of clinical S.pneumoniae isolates in Hangzhou,China,in correlation with β-lactam resistance.Results showed that 19 F was the predominant serotype（7/27） and 14 of the S.pneumoniae isolates were resistant to both penicillin G and cephalosporin.Genotyping results suggested that β-lactam-resistant isolates primarily exhibited single-site mutations in both the STMK and SRNVP motifs of pbp1 a in combination with double-site mutations in the STMK motif of pbp2 x,which might be the primary mechanisms underlying the β-lactam resistance of the isolates in this study.
