Resource Type

Journal Article 150

Year

2023 14

2022 12

2021 12

2020 14

2019 10

2018 15

2017 12

2016 4

2015 8

2014 4

2013 4

2012 9

2011 3

2010 8

2009 6

2008 4

2007 2

2006 1

2005 1

2003 1

open ︾

Keywords

File system 2

Free nitrous acid 2

Hydroxyl radicals 2

finite element method 2

free vibration 2

free vibration analysis 2

hydrogen-free carburizing 2

-butane 1

25-furandicarboxylic acid 1

5-fluorouracil 1

5-hydroxymethyl-2-furfural 1

5-hydroxymethylfurfural 1

In situ generation 1

Sphingopyxis sp 1

AFP 1

ALL FREE 1

Acid-tolerant ammonia oxidizer 1

Adhesion force 1

Adsorption 1

open ︾

Search scope:

排序： Display mode:

Persistent free radicals in humin under redox conditions and their impact in transforming polycyclic

Hanzhong Jia, Yafang Shi, Xiaofeng Nie, Song Zhao, Tiecheng Wang, Virender K. Sharma

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 4, doi: 10.1007/s11783-020-1252-y

Abstract: Abstract • Regulation of redox conditions promotes the generation of free radicals on HM. • HM-PFRscan be fractionated into active and inactive types depending on stability. • The newly produced PFRsThe role of humic substance-associated persistent free radicals (PFRs) in the fate of organic contaminantsThis study examined the characterization of original metal-free peat humin (HM), and HM treated withDuring this process, the HM-associated “unstable” free radicals released an electron to O2, inducing

Keywords： Humic substance     Polycyclic aromatic hydrocarbons (PAHs)     Persistent free radicals (PFRs)     Redox     Reactive    

HTML PDF Collect

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 2, doi: 10.1007/s11783-019-1106-7

Abstract:

PFRs were produced on biochar during Cr(VI) decontamination.

PFRs formation on biochar was owing to the oxidizationitemcontent>

Appearance of excessive oxidant led to the consumption of PFRs

Keywords： Biochar     Persistent free radicals     Phenolic hydroxyl groups     Cr(VI) reduction    

HTML PDF Collect

Light-induced variation in environmentally persistent free radicals and the generation of reactive radical

Yafang Shi, Yunchao Dai, Ziwen Liu, Xiaofeng Nie, Song Zhao, Chi Zhang, Hanzhong Jia

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1285-2

Abstract: Abstract • Light irradiation increased the concentration of free radicals on HS. • The increased spindensities on HS readily returned back to the original value. • The “unstable” free radicals inducedthe formation of reactive radical species. • Reactive radicals’ concentration correlated strongly withEnvironmentally persistent free radicals (EPFRs) in humic substances play an essential role in soil geochemicalAnd the superoxide radicals increased to 1.05 × 1014–1.46 × 1014 spins/g while the alkyl radicals increased

Keywords： Peat     Humic substances     Environmentally persistent free radicals     Light irradiation     Reactive radical species    

HTML PDF Collect

NADPH oxidase and reactive oxygen species as signaling molecules in carcinogenesis

Gang WANG

Frontiers of Medicine 2009, Volume 3, Issue 1,   Pages 1-7 doi: 10.1007/s11684-009-0018-5

Abstract: Reactive oxygen species (ROS) are small molecule metabolites of oxygen that are prone to participate in redox reactions their high reactivity. Intracellular ROS could be generated in reduced nicotinamide-adenine dinucleotidephosphate (NADPH) oxidase-dependent and/or NADPH oxidase-independent manners. Physiologically, ROS are involved in many signaling cascades that contribute to normal processes. One classical example is that ROS derived from the NADPH oxidase and released in neurotrophils are able to digest invading bacteria. Excessive ROS, however, contribute to pathogenesis of various human diseases including cancer, aging, dimentia and hypertension. As signaling messengers, ROS are able to oxidize many targets such as DNA, proteins and lipids, which may be linked with tumor growth, invasion or metastasis. The present review summarizes recent advances in our comprehensive understanding of ROS-linked signaling pathways in regulation of tumor growth, invasion and metastasis, and focuses on the role of the NADPH oxidase-derived ROS in cancer pathogenesis.

Keywords： free radicals     tumor     phox     cell proliferation     cancer therapy    

HTML PDF Collect

One-pot hydrothermal fabrication of BiVO/FeO/rGO composite photocatalyst for the simulated solar light-driven degradation of Rhodamine B

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 3, doi: 10.1007/s11783-021-1470-y

Abstract:

• BiVO4/Fe3O4/rGO has excellent photocatalytic activity under solar light radiation.

Keywords： Photocatalysis     Ternary magnetic photocatalyst     Visible-light-driven     Free radicals trapping     Reusability    

HTML PDF Collect

Predictive models on photolysis and photoinduced toxicity of persistent organic chemicals

Qing ZHANG

Frontiers of Environmental Science & Engineering 2013, Volume 7, Issue 6,   Pages 803-814 doi: 10.1007/s11783-013-0547-7

Abstract: Photodegradation is a major abiotic transformation pathway of toxic chemicals in the environment, which in some cases might lead to photoinduced toxicities. The data on photodegradation kinetics and photoinduced toxicities of organic chemicals are essential for their risk assessment. However, the relevant data are only available for a limited number of chemicals, due to the difficulty and high cost of experimental determination. Quantitative structure-activity relationship (QSAR) models that relate photodegradation kinetics or photoinduced toxicity of organic chemicals with their physicochemical properties or molecular structural descriptors may enable simple and fast estimation of their photochemical behaviors. This paper reviews the QSAR models on photodegradation quantum yields and rate constants for toxic organic chemicals in different media including liquid phase, gaseous phase, surfaces of plant leaves, and QSAR models on photoinduced toxicity of organic chemicals to plants, bacteria, and aquatic invertebrates. Further prospects for QSAR model development on photodegradation kinetics and photoinduced toxicity of refractory organic chemicals are proposed.

Keywords： quantitative structure-activity relationship (QSAR) models     photodegradation     persistent organic pollutants    

HTML PDF Collect

Characterization of bacterial communities during persistent fog and haze events in the Qingdao coastal

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 3, doi: 10.1007/s11783-020-1334-x

Abstract:

• Light haze had little effect on bacterial communities.

Keywords： Bacterial community     Persistent fog and haze     Particle size    

HTML PDF Collect

Addressing the environmental risk of persistent organic pollutants in China

Bin WANG, Jun HUANG, Shubo DENG, Xiaoling YANG, Gang YU

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 2-16 doi: 10.1007/s11783-011-0370-y

Abstract: The Stockholm Convention on persistent organic pollutants (POPs) was adopted in 2001.

Keywords： persistent organic pollutant (POPs)     environmental risk assessment     inventory     environmental monitoring    

HTML PDF Collect

Kinetics and mechanism of nitrobenzene degradation by hydroxyl radicals-based ozonation process enhanced

Weizhou Jiao, Shengjuan Shao, Peizhen Yang, Kechang Gao, Youzhi Liu

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 5,   Pages 1197-1205 doi: 10.1007/s11705-020-1998-6

Abstract: This study investigated the indirect oxidation of nitrobenzene (NB) by hydroxyl radicals (·OH) in a rotating

Keywords： high gravity technology     hydroxyl radicals     nitrobenzene     reaction kinetics    

HTML PDF Collect

Enhanced degradation of trichloroethene by calcium peroxide activated with Fe(III) in the presence of citric acid

Xiang ZHANG,Xiaogang GU,Shuguang LU,Zhouwei MIAO,Minhui XU,Xiaori FU,Muhammad DANISH,Mark L. BRUSSEAU,Zhaofu QIU,Qian SUI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 502-512 doi: 10.1007/s11783-016-0838-x

Abstract: Trichloroethene (TCE) degradation by Fe(III)-activated calcium peroxide (CP) in the presence of citric acid (CA) in aqueous solution was investigated. The results demonstrated that the presence of CA enhanced TCE degradation significantly by increasing the concentration of soluble Fe(III) and promoting H O generation. The generation of HO? and O ? in both the CP/Fe(III) and CP/Fe(III)/CA systems was confirmed with chemical probes. The results of radical scavenging tests showed that TCE degradation was due predominantly to direct oxidation by HO?, while O ? strengthened the generation of HO? by promoting Fe(III) transformation in the CP/Fe(III)/CA system. Acidic pH conditions were favorable for TCE degradation, and the TCE degradation rate decreased with increasing pH. The presence of Cl , HCO , and humic acid (HA) inhibited TCE degradation to different extents for the CP/Fe(III)/CA system. Analysis of Cl production suggested that TCE degradation in the CP/Fe(III)/CA system occurred through a dechlorination process. In summary, this study provided detailed information for the application of CA-enhanced Fe(III)-activated calcium peroxide for treating TCE contaminated groundwater.

Keywords： calcium peroxide     trichloroethene (TCE)     citric acid     ferric ion     free radicals     oxidation    

HTML PDF Collect

Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 12,   Pages 1689-1699 doi: 10.1007/s11705-022-2186-7

Abstract: Radicals are important intermediates in direct coal liquefaction.Certain radicals can cause the cleavage of chemical bonds.of large organic molecules, which can break strong chemical bonds through the induction pyrolysis of radicalsUsing the hydroxyl and ether bonds as indicators, the effects of different radicals on the cleavage of

Keywords： direct coal liquefaction     hydrogen-donor solvent     induced pyrolysis     radical mechanism     density functional theory calculations    

HTML PDF Collect

Analysis of US National Research Council’s Persistent Forecasting System of Disruptive Technologies

Zhang Xiaolin

Strategic Study of CAE 2018, Volume 20, Issue 6,   Pages 117-121 doi: 10.15302/J-SSCAE-2018.06.019

Abstract:

The National Research Council’s (NRC) report on Persistent ForecastingDisruptive Technologies analyzes the key issues of disruptive technology forecasting and proposes an ideal persistentconnotation and challenges of disruptive technology forecasting, presents the attributes of the ideal persistent

Keywords： disruptive technologies     persistent forecasting     ideal forecasting system    

HTML PDF Collect

Perfluoroalkane acids in human milk under the global monitoring plan of the Stockholm Convention on Persistent

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 10, doi: 10.1007/s11783-022-1541-8

Abstract:

● Perfluorooctanesulfonic acid and perfluorooctanoic acid highest in human milk.

Keywords： Human biomonitoring     Human breast milk     LC-MS/MS analysis     Lifestyle parameters    

HTML PDF Collect

Endosulfan in the Chinese environment: monitoring and modeling

Hongliang JIA, Liyan LIU, Yeqing SUN, Daoji CAI, Jianxin HU, Nanqi REN, Yifan LI

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 1,   Pages 32-44 doi: 10.1007/s11783-011-0375-6

Abstract: This paper reviews the usage and emissions of endosulfan, the newest member of the persistent organic

Keywords： endosulfan     monitoring     modeling     inventories     persistent organic pollutants     persistent organic pollutants    

HTML PDF Collect

combination with determination of bilirubin from duodenal drainage in differential diagnosis of infantile persistent

Sheng-Xuan LIU, Zhi-Hua HUANG

Frontiers of Medicine 2010, Volume 4, Issue 3,   Pages 342-345 doi: 10.1007/s11684-010-0099-1

Abstract: scintigraphy in combination with duodenal fluid examination was used for evaluation in 84 infants with persistent

Keywords： jaundice     radionuclide hepatobiliary scintigraphy     duodenal drainage    

HTML PDF Collect

Title Author Date Type Operation

Persistent free radicals in humin under redox conditions and their impact in transforming polycyclic

Hanzhong Jia, Yafang Shi, Xiaofeng Nie, Song Zhao, Tiecheng Wang, Virender K. Sharma

Journal Article

Decontamination of Cr(VI) facilitated formation of persistent free radicals on rice husk derived biochar

Kaikai Zhang, Peng Sun, Yanrong Zhang

Journal Article

Light-induced variation in environmentally persistent free radicals and the generation of reactive radical

Yafang Shi, Yunchao Dai, Ziwen Liu, Xiaofeng Nie, Song Zhao, Chi Zhang, Hanzhong Jia

Journal Article

NADPH oxidase and reactive oxygen species as signaling molecules in carcinogenesis

Gang WANG

Journal Article

One-pot hydrothermal fabrication of BiVO/FeO/rGO composite photocatalyst for the simulated solar light-driven degradation of Rhodamine B

Journal Article

Predictive models on photolysis and photoinduced toxicity of persistent organic chemicals

Qing ZHANG

Journal Article

Characterization of bacterial communities during persistent fog and haze events in the Qingdao coastal

Journal Article

Addressing the environmental risk of persistent organic pollutants in China

Bin WANG, Jun HUANG, Shubo DENG, Xiaoling YANG, Gang YU

Journal Article

Kinetics and mechanism of nitrobenzene degradation by hydroxyl radicals-based ozonation process enhanced

Weizhou Jiao, Shengjuan Shao, Peizhen Yang, Kechang Gao, Youzhi Liu

Journal Article

Enhanced degradation of trichloroethene by calcium peroxide activated with Fe(III) in the presence of citric acid

Xiang ZHANG,Xiaogang GU,Shuguang LU,Zhouwei MIAO,Minhui XU,Xiaori FU,Muhammad DANISH,Mark L. BRUSSEAU,Zhaofu QIU,Qian SUI

Journal Article

Regulation of radicals by hydrogen-donor solvent in direct coal liquefaction

Journal Article

Analysis of US National Research Council’s Persistent Forecasting System of Disruptive Technologies

Zhang Xiaolin

Journal Article

Perfluoroalkane acids in human milk under the global monitoring plan of the Stockholm Convention on Persistent

Journal Article

Endosulfan in the Chinese environment: monitoring and modeling

Hongliang JIA, Liyan LIU, Yeqing SUN, Daoji CAI, Jianxin HU, Nanqi REN, Yifan LI

Journal Article

combination with determination of bilirubin from duodenal drainage in differential diagnosis of infantile persistent

Sheng-Xuan LIU, Zhi-Hua HUANG

Journal Article