The removal of ciprofloxacin(CIP)in sulfur-mediated bio processes,e.g.,sulfate-reducing bacteria(SRB)-mediated process and sulfur-oxidizing bacteria(SOB)-mediated process,was examined for the first time.The results sh...The removal of ciprofloxacin(CIP)in sulfur-mediated bio processes,e.g.,sulfate-reducing bacteria(SRB)-mediated process and sulfur-oxidizing bacteria(SOB)-mediated process,was examined for the first time.The results showed that the SRB-mediated process had more efficient CIP removal than that in SOB-mediated process.Adsorption was the primary removal pathway of CIP in SRB-mediated process and SOB-mediated process with the specific adsorption removal rate of 131.4±1.1μg/g-SS/d and30.1±1.4μg/g-SS/d,respectively,at influent CIP concentration of 500μg/L.In addition,extracellular polymeric substances(EPS)also played an important role on CIP migration and removal in both types of sludge.Further study was conducted to specify the different adsorption of CIP in these two sludge systems from the perspective of sludge properties.The results indicated that there are more potential adsorption sites exist on the SRB-mediated sludge for CIP adsorption than SOB-mediated sludge since the higher protein(PN)content and more kinds of aromatic amino acid substances in EPS,more negative zeta-potential and stronger and more numbers of functional groups in SRB-mediated sludge compared to SOB-mediated sludge.The findings of this study provide insights into the sludge properties affecting CIP removal in sulfur-mediated bioprocesses,and are of guiding significance to employ sulfur-mediated biological systems for treating CIP-containing wastewaters.展开更多
目的探讨CIP2A、c-myc在基底细胞样乳腺癌(basal-like breast carcinoma,BLBC)、非基底细胞样乳腺癌(non-basal-likebreast cancer,NON-BLBC)及正常乳腺组织中的表达及其之间的相互关系。方法采用免疫组化MaxVision两步法对43例BLBC、53...目的探讨CIP2A、c-myc在基底细胞样乳腺癌(basal-like breast carcinoma,BLBC)、非基底细胞样乳腺癌(non-basal-likebreast cancer,NON-BLBC)及正常乳腺组织中的表达及其之间的相互关系。方法采用免疫组化MaxVision两步法对43例BLBC、53例NON-BLBC及20例正常乳腺组织中CIP2A、c-myc的表达进行检测。结果 CIP2A、c-myc蛋白在BLBC中的表达明显高于正常乳腺组织,且与BLBC淋巴结转移及临床分期有关,差异均有统计学意义(P<0.05)。CIP2A与c-myc蛋白的表达呈正相关(r=0.446,P<0.01)。结论 CIP2A可能与BLBC的发生、发展相关,且进一步支持CIP2A与c-myc之间的正反馈调节作用。展开更多
基金supported by the National Natural Science Foundation of China(Nos.51922110 and 51778643)。
文摘The removal of ciprofloxacin(CIP)in sulfur-mediated bio processes,e.g.,sulfate-reducing bacteria(SRB)-mediated process and sulfur-oxidizing bacteria(SOB)-mediated process,was examined for the first time.The results showed that the SRB-mediated process had more efficient CIP removal than that in SOB-mediated process.Adsorption was the primary removal pathway of CIP in SRB-mediated process and SOB-mediated process with the specific adsorption removal rate of 131.4±1.1μg/g-SS/d and30.1±1.4μg/g-SS/d,respectively,at influent CIP concentration of 500μg/L.In addition,extracellular polymeric substances(EPS)also played an important role on CIP migration and removal in both types of sludge.Further study was conducted to specify the different adsorption of CIP in these two sludge systems from the perspective of sludge properties.The results indicated that there are more potential adsorption sites exist on the SRB-mediated sludge for CIP adsorption than SOB-mediated sludge since the higher protein(PN)content and more kinds of aromatic amino acid substances in EPS,more negative zeta-potential and stronger and more numbers of functional groups in SRB-mediated sludge compared to SOB-mediated sludge.The findings of this study provide insights into the sludge properties affecting CIP removal in sulfur-mediated bioprocesses,and are of guiding significance to employ sulfur-mediated biological systems for treating CIP-containing wastewaters.
