Here we describe the first case of abscess infection caused by Nocardia beijingensis in China.The patient was immunocompetent but suffered from postoperative abscess for 6 years.This study highlights the necessity of ...Here we describe the first case of abscess infection caused by Nocardia beijingensis in China.The patient was immunocompetent but suffered from postoperative abscess for 6 years.This study highlights the necessity of long-term infected foci to be thoroughly examined to identify the pathogen,as well as the importance of accurate Nocardia identification and antimicrobial susceptibility tests for understanding the pathogen’s epidemiology,clinical significance,and treatment strategy.展开更多
The removal of As(V) from synthetic water was studied using four different nanofiltration (NF) membranes (ESNA-1-K1, NF270, ESNA-1-LF, and HODRA-CORE). The influences of ion concentration, transmembrane pressure...The removal of As(V) from synthetic water was studied using four different nanofiltration (NF) membranes (ESNA-1-K1, NF270, ESNA-1-LF, and HODRA-CORE). The influences of ion concentration, transmembrane pressure (TMP), and the presence of natural organic matter (humic acid, HA) on the arsenic removal efficiency and permeate flux were investigated. The arsenic rejection of ESNA- 1-LF was higher than those of the other membranes in all experiments (〉 94%), and the HODRA-CORE membrane gave the lowest removal of arsenic (〈 47%). An increase in the ion concentration in the feed solution and addition of HA decreased the arsenic rejection of the HODRA-CORE membrane. However, both increasing of the ion concentration and addition of HA made the rejection increased for the other membranes (ESNA-1-K1, NF270, and ESNA-1-LF). With increasing TMP, for all four NF membranes, increases in both arsenic rejection and permeate flux were observed. The permeate fluxes of the four NF membranes decreased to some extent after addition of HA to the solutions for operating time of 6 hr.展开更多
基金supported by the National Nature Science Foundation of China (No.81902112).
文摘Here we describe the first case of abscess infection caused by Nocardia beijingensis in China.The patient was immunocompetent but suffered from postoperative abscess for 6 years.This study highlights the necessity of long-term infected foci to be thoroughly examined to identify the pathogen,as well as the importance of accurate Nocardia identification and antimicrobial susceptibility tests for understanding the pathogen’s epidemiology,clinical significance,and treatment strategy.
基金supported by the National Natural Science Foundation of China (No.21176245, 50978245)the National Science and Technology Support Program of China (No.2012BAJ25B02, 2012BAJ25B06)the High Technology Research and Development Program (863) of China (No.2009AA062901)
文摘The removal of As(V) from synthetic water was studied using four different nanofiltration (NF) membranes (ESNA-1-K1, NF270, ESNA-1-LF, and HODRA-CORE). The influences of ion concentration, transmembrane pressure (TMP), and the presence of natural organic matter (humic acid, HA) on the arsenic removal efficiency and permeate flux were investigated. The arsenic rejection of ESNA- 1-LF was higher than those of the other membranes in all experiments (〉 94%), and the HODRA-CORE membrane gave the lowest removal of arsenic (〈 47%). An increase in the ion concentration in the feed solution and addition of HA decreased the arsenic rejection of the HODRA-CORE membrane. However, both increasing of the ion concentration and addition of HA made the rejection increased for the other membranes (ESNA-1-K1, NF270, and ESNA-1-LF). With increasing TMP, for all four NF membranes, increases in both arsenic rejection and permeate flux were observed. The permeate fluxes of the four NF membranes decreased to some extent after addition of HA to the solutions for operating time of 6 hr.