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Efficient removal of natural organo-chromium(Ⅲ)through selfcirculating decomplex and immobilization with nanoscale zerovalent iron

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Nano Research 2024年第1期17卷 364-371页

作者： Zhicheng Dong Yunyun Xu can wu Jin Chao Chen Tian Zhang Lin School of Metallurgy and Environment Central South UniversityChangsha 410083China Chinese National Engineering Research Center for Control&Treatment of Heavy Metal Pollution Changsha 410083China College of Ecology and Environment Chengdu University of TechnologyChengdu 610059China School of Environment and Energy The Key Laboratory of Pollution Control and Ecosystem Restoration in Industry Clusters(Ministry of Education)South China University of TechnologyGuangzhou 510006China

Organo-chromium(III)complex is one of the chromium contaminant species,which would transform to high-toxic Cr(VI)during migrating in the environment.Such natural organo-chromium(III)(NOCr)is difficult to remove by traditional degradation or precipitation methods,due to its high stability and solubility.Herein,we demonstrated a novel NOCr removing method by transforming it to certain structures similar to Cr-Fe minerals in nature,through a self-circulating decomplex and immobilization mechanism with nano zero-valent iron(nZVI).Taking chromium glycinate(Cr-Gly)as a probe,nZVI showed a high Cr removal efficiency of 99.4%under ambient conditions.The removal process included three stages of adsorption,decomplexation,and re-immobilization.Cr-Gly was first adsorbed on the surface of nZVI by chemisorption of the oxide shell.Then,the adsorbed Cr-Gly was decomplexed and oxidized to Cr(VI)by·OH and 1O_(2),which were generated from molecular oxygen activated by nZVI.Meanwhile,the released Cr(VI)could be in-situ adsorbed and re-reduced to Cr(III),which was further immobilized in form of Cr-O-Fe complex.As the Cr-O-Fe complexing structure was similar to that of Cr-Fe minerals(such as chromohercynite)in nature,this work explored a novel and efficient NOCr removing method that was potential to weaken chromium pollution in the environment.

关键词： organo-chromium(III) zero-valent iron adsorption decomplexation Cr immobilization

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Emission and optical characteristics of brown carbon in size-segregated particles from three types of Chinese ships

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Journal of Environmental Sciences 2024年第8期142卷 248-258页

作者： Fengqin Yang Fan Zhang Zeyu Liu Yingjun Chen Yan Zhang can wu Yali Lei Shijie Liu Binyu Xiao Xinyi Wan Yubao Chen Yong Han Min Cui Cheng Huang Gehui Wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 200241China Institute of Eco-Chongming 20 Cuiniao Rd.ChongmingShanghai 202150China State Environmental Protection Key Laboratory of Formation and Prevention of the Urban Air Pollution Complex Shanghai Academy of Environmental SciencesShanghai 200233China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention(LAP3) Department of Environmental Science and EngineeringFudan UniversityShanghai 200438China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China Department of Civil and Environmental Engineering and State Key Laboratory of Marine Pollution The Hong Kong Polytechnic UniversityKowloon 100872Hong KongChina College of Environmental Science and Engineering Yangzhou UniversityYangzhou 225009China

Brown carbon(BrC)is one of the important light absorption substances that have high light absorption ability under short wavelength light.However,limit studies have focused on the BrC emission from ships.In this study,size-segregated particulate matters(PM)were collected from three different types of ships,light absorption characteristics and size distribution of methanol-soluble BrC and water-soluble BrC in PM from ship exhausts were investigated.Results showed that four-stroke low-power diesel fishing boat(4-LDF)had the highest mass concentrations of methanol-soluble organic carbon(MSOC)and water-soluble organic carbon(WSOC),followed by 2-stroke high-power heavy-fuel-oil vessel(2-HHV),and fourstroke high-power marine-diesel vessel(4-HMV).While 2-HHV had obviously higher light absorption coefficients of methanol-soluble BrC(Abs365,M)and water-soluble BrC(Abs365,W)in unit weight of PM than the other two types of ships.The tested ships presented comparable or higher absorption efficiency of BrC in water extracts(MAE365,W)compared with other BrC emission sources.Majority of BrC was concentrated in fine particles,and the particle size distributions of both Abs365,Mand Abs365,Wshowed bimodal patterns,peaking at0.43–0.65μm and 4.7–5.8μm,respectively.However,different particle size distributions were found for MAE365,Mbetween diesel and heavy fuel oil ships.Besides,different wavelength dependence in particles with different size were also detected.Ship exhaust could be confirmed as a non-ignorable BrC emission source,and complex influencing factor could affect the light absorption characteristics of ship emissions.Particle size should also be considered when light absorption ability of BrC was evaluated.

关键词： Ship emission Brown carbon Light absorption Size distribution

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Postoperative pneumocranium after endoscopic transnasal optic canal decompression

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International Journal of Ophthalmology(English edition) 2024年第5期17卷 973-975页

作者： Sheng-Jian Lu Bo Yu Wen-can wu The Eye Hospital School of Ophthalmology&OptometryWenzhou Medical UniversityWenzhou 325027Zhejiang ProvinceChina

Dear Editor,We present the first time,a case of a patient developed cerebrospinal fluid(CSF)leak and pneumocranium following optic canal decompression(OCD).INTRODUCTION Indirect traumatic optic neuropathy(ITON)impairs visual functions and quality of life.Endoscopic transnasal optic canal decompression(ETOCD)is one of the standard treatment strategies for the ITON.During the ETOCD,the optic nerve sheath are usually incised for sufficient decompression of optic nerve after removal of optic canal,which is associated with complications like CSF leakage,ophthalmic artery injury,and optic nerve injury[1].Generally,the mild CSF leak is common and can heal spontaneously using conventional treatment,the severe CSF leak requires surgical repair[2].

关键词： decompression nasal traumatic

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Effect of NOx and RH on the secondary organic aerosol formation from toluene photooxidation

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Journal of Environmental Sciences 2022年第4期34卷 1-9页

作者： Shijie Liu Xiaodi Liu Yiqian Wang Si Zhang can wu Wei Du Gehui Wang Key Lab of Geographic Information Science of the Ministry of Education School of Geographic SciencesEast China Normal UniversityShanghai 210062China Institute of Eco-Chongming 3663 North Zhongshan RoadShanghai 200062China

The secondary organic aerosol(SOA)formation mechanism and physicochemical properties can highly be influenced by relative humidity(RH)and NOx concentration.In this study,we performed a laboratory investigation of the SOA formation from toluene/OH photooxidation system in the presence or absence of NOx in dry and wet conditions.The chemical composition of toluene-derived SOA was measured using Aerodyne high-resolution timeof-flight aerosol mass spectrometer(HR-ToF-AMS).It was found that the mass concentration of toluene decreased with increasing RH and NOx concentration.However,the change of SOA chemistry composition(f_(44),O/C)with increased RH was not consistent in the condition with or without NOx.The light absorption and mass absorption coefficient(MAC)of the toluene-derived SOA only increased with RH in the presence of NOx.In contrast,MAC is invariant with RH in the absence of NOx.HR-ToF-AMS results showed that,in the presence of NOx,the increased nitro-aromatic compounds and N/C ratio concurrently caused the increase of SOA light absorption and O/C in wet conditions,respectively.The relative intensity of CHON and CHOxN family to the total nitrogen-containing organic compounds(NOCs)increased with the increasing RH,and be the major components of NOCs in wet condition.This work revealed a synergy effect of NOx and RH on SOA formation from toluene photooxidation.

关键词： Toluene Photooxidation Relative humidity NOx Optical property

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Clinical and prognostic significance of expression of phosphoglycerate mutase family member 5 and Parkin in advanced colorectal cancer

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World Journal of Clinical Cases 2022年第14期10卷 4368-4379页

作者： can wu Ming-Liang Feng Tai-Wei Jiao Ming-Jun Sun Department of Endoscope The First Hospital Affiliated to China Medical UniversityShenyang 110001Liaoning ProvinceChina

BACKGROUND Drugs targeting mitochondria can induce mitophagy and restrain proliferation in colorectal cancer(CRC)cells.Phosphoglycerate mutase family member 5(PGAM5)activates serine/threonine PTEN-induced putative kinase 1/Parkin pathway-mediated mitophagy.However,there are few studies on the clinical and prognostic significance of expression of PGAM5 protein and mitophagy-related protein Parkin in patients.AIM To assess the clinical significance of PGAM5 and Parkin proteins,as biomarkers for diagnosis and prognosis of CRC,by studying their expression in advanced CRC tissues and their association with clinicopathological parameters.METHODS The expression of PGAM5 and Parkin in CRC tissues from 100 patients was determined by immunohistochemistry.Each case was evaluated by using a combined scoring method based on signal intensity staining(scored 0-3)and the proportion of positively stained cancer cells(scored 0-4).The final staining score was calculated as the intensity score multiplied by the proportion score.Specimens were categorized as either high or low expression according to the Youden index,and the association between the expression of PGAM5 or Parkin and clinicopathological factors was ascertained.Additionally,we employed western blot to measure PGAM5 and Parkin protein expression in six matched pairs of CRC and adjacent non-tumor tissues.RESULTS Immunohistochemical and western blot findings showed that both PGAM5 and Parkin protein expression in tumor tissues was significantly higher than that in the adjacent tissues:PGAM5 and Parkin were mainly expressed in the cytoplasm of colonic epithelial cells.PGAM5 and Parkin protein levels were significantly positively correlated in advanced CRC tissues.Moreover,reduced Parkin protein expression was an independent prognostic factor for overall survival and progression-free survival in CRC patients as evinced by multivariate analysis.CONCLUSION The expression of PGAM5 protein and mitophagy-related protein Parkin has diagnostic significance for CRC and may become ne

关键词： Phosphoglycerate mutase family member 5 Parkin,Mitophagy Colorectal cancer Diagnostic marker cancer prognosis

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Investigations for vibration and friction torque behaviors of thrust ball bearing with self-driven textured guiding surface

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Friction 2023年第6期11卷 894-910页

作者： can wu Kai YANG Jing NI Shuigen LU Lidan YAO Xinglin LI School of Mechanical Engineering Hangzhou Dianzi UniversityHangzhou310018China Hangzhou Bearing Test&Research Center with Assistance of UNDP/UNIDO Hangzhou310022China Machinery Industry Bearing Quality Inspection Center(Hangzhou) Hangzhou310022China Sinopec Research Institute of Petroleum Processing Beijing100083China

In order to improve the starved lubrication condition of rolling bearings,three kinds of textures,namely dimple,groove texture,and gradient groove texture,were developed on the guiding surface of thrust ball bearings in this study.The results show that gradient groove texture has the one-way self-driving function of liquid droplets.The root mean square(RMS)value of vibration acceleration of gradient groove textured bearing(GGB)decreased by 49.1% and the kurtosis decreased by 24.6% compared with non-textured bearing(NB)due to the directional spreading effect of gradient groove textures on oil.The frequency domain analysis showed that the textures mainly suppressed the medium and high-frequency energy of bearing vibration,and the GGB was reduced the most with 65.3% and 48%,respectively.In addition,whether the grease is sufficiently sheared has a large impact on the oil guiding effect,and the friction torque of GGB could decrease by 10.5% compared with NB in the sufficiently sheared condition.Therefore,the gradient groove texture with oil self-driven effect on the guiding surface of rolling bearing can effectively improve the lubrication condition of the bearing and thus reduce the bearing vibration and friction torque,which has a promising application prospect.

关键词： self-driven textures gradient grooved bearing guiding surface bearing vibration friction torque

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农业文化遗产:地方性知识的生成与演变

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湖南师范大学社会科学学报 2024年第2期53卷 33-41页

作者：吴灿中南大学中国村落文化研究中心湖南长沙410083

农业文化遗产是因地方性知识在流动与发展过程中发生转变而产生的,它生成于“情境”中,带有明显经验性特征的初级知识,在多种因素的推动下向原理化、权威化的知识形态转换。这种转换既是地方性知识本身为适应社会发展与观念变革进行的调... 详细信息

农业文化遗产是因地方性知识在流动与发展过程中发生转变而产生的,它生成于“情境”中,带有明显经验性特征的初级知识,在多种因素的推动下向原理化、权威化的知识形态转换。这种转换既是地方性知识本身为适应社会发展与观念变革进行的调试,也是权威化的农业文化遗产观念被建构的过程。从知识流动过程与发展逻辑对农业文化遗产观念进行观照与反思,将为深入认识农业文化遗产概念、合理进行遗产保护实践提供助益。

关键词：农业文化遗产地方性知识文化观念

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Reusable electrochemical non-enzymatic glucose sensors based on Au-inlaid nanocages

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Nano Research 2022年第7期15卷 6490-6499页

作者： Lu Shen Zhen Liang Zhiyu Chen can wu Xuefeng Hu Jieyu Zhang Qing Jiang Yunbing Wang National Engineering Research Center for Biomaterials Sichuan UniversityChengdu 610065China

Mass detection of glucose,which is required in many applications,remains challenging.The commercial enzyme-based glucose test strips cannot be reused,and current non-enzymatic glucose sensors exhibit a narrow range of detection and slow glucose oxidation kinetics.Herein,controlled etching of Prussian blue analogue(PBA)nanocubes at the vertices is conducted and Au nanoparticles(Au NPs)are subsequently inlaid in the etched cavities by in-situ reduction of HAuCl4.The unique AuNP-PBA nanocomplexes exhibit low electrochemical potential for glucose oxidation,high electrocatalytic activity,and rapid redox electron transfer rate.Covalent immobilization of the Au-inlaid nanomaterials on a fine Au wire leads to a non-enzymatic glucose sensor with a particularly wide linear detection range(10μM to 16 mM),excellent anti-interference,and fast response.More importantly,the sensor is reusable,and its sensitivity is well maintained even after 150 times of detection.This new-concept material promises to enable high-throughput glucose detection at a low cost,which is essential in diabetic management and other healthcare applications.

关键词： non-enzymatic glucose sensors Prussian blue analogues gold nanoparticles electrochemistry reusable sensors

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Nano-TiO_(2) coate d nee dle carbon fib er reinforced phenolic aerogel composite with low density, excellent heat-insulating and infrared radiation shielding performance

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Journal of Materials Science & Technology 2023年第21期152卷 181-189页

作者： Yiwu Pan Xiangyu Jin Hebing Wang He Huang can wu Xiaojie Yan Changqing Hong Xinghong Zhang National Key Laboratory of Science and Technology on Advanced Composites in Special Environments Harbin Institute of TechnologyHarbin 150001China

High-performance thermal protection materials(TPMs)for spacecraft are becoming current research hotspots.Lightweight polymer-based ablators are considered to be the most promising candidates for TPMs due to their excellent designability and versatility.In this study,a unique nano-TiO_(2) coated needled carbon fiber felt/phenolic resin aerogel composite(TiCF/PR)is reported.Wherein the anatase nano-TiO_(2) was in-situ coated on the surface of carbon fibers uniformly through the sol-gel and calcination method,then,the phenolic resin aerogel was in-situ synthesized in the nano-TiO_(2) coated needled carbon fiber felt(TiCF)preform through vacuum impregnation and solvothermal method.The as-prepared aerogel com-posite possesses a low density(0.30–0.32 g/cm^(3)),low thermal conductivity(0.034 and 0.312 W/(m K)in the z and xy directions),and excellent thermal stability with 13.86%residual weight at 1300℃ in air.It is worthwhile to note that the TiCF/PR composite exhibits excellent antioxidant ablation and infrared(IR)radiation shielding properties in a high-temperature heating environment.With an oxygen-acetylene blaze heating of 1.5 MW/m^(2) for 150 s,the linear ablation rates decreased by 13.4%,and the backside temperature reduced from 322.3 to 179.1℃ compared to that of the sample without nano-TiO_(2) coating.The experimental and theoretical analysis showed that the present TiCF/PR nanocomposite has competitive and potential application prospects in the field of future TPMs.

关键词： Carbon fiber Opacifier Mechanical properties Thermal properties Ablation performance

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Mechanism of ELL-associated factor 2 and vasohibin 1 regulating invasion,migration,and angiogenesis in colorectal cancer

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World Journal of Gastroenterology 2023年第24期29卷 3770-3792页

作者： Ming-Liang Feng Ming-Jun Sun Bo-Yang Xu Meng-Yuan Liu Hui-Jing Zhang can wu Department of Endoscopy The First Hospital Affiliated to China Medical UniversityShenyang 110001Liaoning ProvinceChina

BACKGROUND As a novel endogenous anti-angiogenic molecule, vasohibin 1(VASH1) is not only expressed in tumor stroma, but also in tumor tissue. Moreover, studies have shown that VASH1 may be a prognostic marker in colorectal cancer(CRC). Knockdown of VASH1 enhanced transforming growth factor-β1(TGF-β1)/Smad3 pathway activity and type Ⅰ/Ⅲ collagen production. Our previous findings suggest that ELL-associated factor 2(EAF2) may play a tumor suppressor and protective role in the development and progression of CRC by regulating signal transducer and activator of transcription 3(STAT3)/TGF-β1 signaling pathway. However, the functional role and mechanism of VASH1-mediated TGF-β1 related pathway in CRC has not been elucidated.AIM To investigate the expression of VASH1 in CRC and its correlation with the expression of EAF2. Furthermore, we studied the functional role and mechanism of VASH1 involved in the regulation and protection of EAF2 in CRC cells in vitro.METHODS We collected colorectal adenocarcinoma and corresponding adjacent tissues to investigate the clinical expression of EAF2 protein and VASH1 protein in patients with advanced CRC. Following, we investigated the effect and mechanism of EAF2 and VASH1 on the invasion, migration and angiogenesis of CRC cells in vitro using plasmid transfection.RESULTS Our findings indicated that EAF2 was down-regulated and VASH1 was upregulated in advanced CRC tissue compared to normal colorectal tissue. KaplanMeier survival analysis showed that the higher EAF2 Level group and the lower VASH1 Level group had a higher survival rate. Overexpression of EAF2 might inhibit the activity of STAT3/TGF-β1 pathway by up-regulating the expression of VASH1, and then weaken the invasion, migration and angiogenesis of CRC cells.CONCLUSION This study suggests that EAF2 and VASH1 may serve as new diagnostic and prognostic markers for CRC, and provide a clinical basis for exploring new biomarkers for CRC. This study complements the mechanism of EAF2 in CRC cells, enriches the role and mechanism o

关键词： ELL-associated factor 2 Vasohibin 1 Transforming growth factor-β1 Signal transducer and activator of transcription 3 Colorectal cancer Angiogenesis

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