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Enhanced Poly(ethylene terephthalate) Hydrolase Activity by Protein Engineering Article

Yuan Ma, Mingdong Yao, Bingzhi Li, Mingzhu Ding, Bo He, Si Chen, Xiao Zhou, Yingjin Yuan

Engineering 2018, Volume 4, Issue 6,   Pages 888-893 doi: 10.1016/j.eng.2018.09.007

Abstract: PETase) from Ideonella sakaiensis exhibits a strong ability to degrade poly(ethylene terephthalate) (PETTherefore, we explored the interaction between PETase and the substrate (a dimer of the PET monomer ethyleneterephthalate, 2PET), using a model of PETase and its substrate.The I179F mutant showed the highest activity, with the degradation rate of a PET film reaching 22.5 mg

Keywords： Polyesterase     PET degradation     Cell-free protein synthesis     Polyester     PETase    

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An investigation of local high spatial resolution adaptive PET system

Liu Jingjing,Xie Qingguo

Strategic Study of CAE 2011, Volume 13, Issue 10,   Pages 105-112

Abstract:

A critical challenge in positron emission tomography (PET) is to developWe imagine a PET system, for imaging a region of interest (ROI) with ultra high performances and otherregions with normal performances by use of inhomogeneous performances PET detectors.We propose such a prototype, consisting of a few ultra high intrinsic spatial resolution PET detectors

Keywords： positron emission tomography     adaptive PET system     region of interest     local spatial resolution     inhomogeneousperformance PET detector    

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F-FDG-PET glucose hypometabolism pattern in patients with epileptogenic hypothalamic hamartoma

Frontiers of Medicine 2021, Volume 15, Issue 6,   Pages 913-921 doi: 10.1007/s11684-021-0874-1

Abstract: Epileptogenic hypothalamic hamartoma is characterized by intractable gelastic seizures. A systematic analysis of the overall brain metabolic pattern in patients with hypothalamic hamartoma (HH) could facilitate the understanding of the epileptic brain network and the associated brain damage effects of HH. In this study, we retrospectively evaluated 27 patients with epileptogenic HH (8 female patients; age, 2–33 years) by using 18F-fluorodeoxyglucose-positron emission tomography. The correlations among tomography result, seizure type, sex, and structural magnetic resonance imaging were assessed. Whole metabolic patterns and voxel-based morphometry findings were assessed by group analysis with healthy controls. Assessment of the whole metabolic pattern in patients with HH revealed several regional metabolic reductions in the cerebrum and an overall metabolic reduction in the cerebellum. In addition, areas showing hypometabolism in the neocortex were more widely distributed ipsilaterally than contralaterally to the HH. Reductions in glucose metabolism and gray matter volume in the neocortex were predominant ipsilateral to the HH. In conclusion, the glucose hypometabolism pattern in patients with epileptogenic HH involved the neocortex, subcortical regions, and cerebellum. The characteristics of glucose hypometabolism differed across seizure type and sex. Reductions in glucose metabolism and structural changes may be based on different mechanisms, but both are likely to occur ipsilateral to the HH in the neocortex. We hypothesized that the dentato-rubro-thalamic tract and cerebro-ponto-cerebellar tract, which are responsible for intercommunication between the cerebral cortex, subcortical regions, and cerebellar regions, may be involved in a pathway related to seizure propagation, particularly gelastic seizures, in patients with HH.

Keywords： hypothalamic hamartoma     gelastic seizure     fluorodeoxyglucose-positron emission tomography     voxel-based morphometry    

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4-Amino-1,8-naphthalimide based fluorescent photoinduced electron transfer (PET) pH sensors as liposomalcellular imaging agents: The effect of substituent patterns on PET directional quenching

Miguel Martínez-Calvo, Sandra A. Bright, Emma B. Veale, Adam F. Henwood, D. Clive Williams, Thorfinnur Gunnlaugsson

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 1,   Pages 61-75 doi: 10.1007/s11705-019-1862-8

Abstract: highly pH dependent, the emission being ‘switched on’ in acidic media, while being quenched due to PETNevertheless, at higher pH, PET quenching was also found to occur from the polyamine site.is better described as a receptor -spacer -fluorophore-spacer -receptor system, where the dominant PETprocess is due to (normally less favourable) ‘directional’ PET quenching from the 4-amino-aniline unit

Keywords： sensors     pH     photoinduced electron transfer     cellular imaging     confocal microscopy    

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Solubility of CO in solid-state PET measured by pressure-decay method

CHEN Miaocan, ZHAO Ling, LIU Tao, WU Jiangwei, YUAN Weikang

Frontiers of Chemical Science and Engineering 2008, Volume 2, Issue 2,   Pages 214-219 doi: 10.1007/s11705-008-0040-1

Abstract: The solubility of CO in solid-state PET was measured using a pressure-decay method.In order to calculate the solubility of CO in the amorphous region of PET, the crystallinity of solidstate PET dissolved in CO at different pressures and temperatures was measured by differential scanningThe solubility of CO in the amorphous region of PET at 373.15 K, 398.15 K and 423.15 K was correlated

Keywords： Sanchez-Lacombe equation     solid-state PET     different     relationship     calorimetry    

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Laser sintering of Cu nanoparticles on PET polymer substrate for printed electronics at different wavelengths

Juan Carlos HERNANDEZ-CASTANEDA, Boon Keng LOK, Hongyu ZHENG

Frontiers of Mechanical Engineering 2020, Volume 15, Issue 2,   Pages 303-318 doi: 10.1007/s11465-019-0562-x

Abstract: This study explores the feasibility of different laser systems to sinter screen-printed lines from nonconductive copper nanoparticles (Cu NPs) on polyethylene terephthalate polymer film. These materials are commonly used in manufacturing functional printed electronics for large-area applications. Here, optical and thermal characterization of the materials is conducted to identify suitable laser sources and process conditions. Direct diode (808 nm), Nd:YAG (1064 nm and second harmonic of 532 nm), and ytterbium fiber (1070 nm) lasers are explored. Optimal parameters for sintering the Cu NPs are identified for each laser system, which targets low resistivity and high processing speed. Finally, the quality of the sintered tracks is quantified, and the laser sintering mechanisms observed under different wavelengths are analyzed. Practical considerations are discussed to improve the laser sintering process of Cu NPs.

Keywords： laser sintering     copper nanoparticles     printed electronics    

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Erratum to: On secondary new particle formation in China

Markku KULMAMA,Tuukka Petäjä,Veli-Matti KERMINEN,Joni KUJANSUU,Taina RUUSKANEN,Aijun DING,Wei NIE,Min

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 5, doi: 10.1007/s11783-016-0857-7

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Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of 18F-FDG PET

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Frontiers of Medicine 2017, Volume 11, Issue 3,   Pages 440-444 doi: 10.1007/s11684-017-0523-x

Abstract: and splenomegaly. 18F-fluoro-deoxy-glucose positron emission tomography/computed tomography (18F-FDG PET

Keywords： Philadelphia chromosome     acute myeloid leukemia     mass     osteolysis     positron emission tomography    

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Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 3,   Pages 781-792 doi: 10.1007/s11709-021-0733-9

Abstract: construction of lightweight cellular concrete (LCC), material damage frequently occurs, causing the degradation

Keywords： lightweight cellular concrete     construction-induced damage     freeze-thaw action     microstructure     degradation    

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Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

Frontiers of Chemical Science and Engineering 2020, Volume 14, Issue 6,   Pages 956-966 doi: 10.1007/s11705-019-1907-z

Abstract: Its catalytic activity has been investigated for the degradation of orange II dye using three differentThe last system exhibits the maximum degradation efficiency of 90%, much higher than the photocatalysisFurthermore, the potential degradation mechanisms applicable to the three systems are discussed withactive species such as Mn(III), O , h , e , SO and HO are proposed to be responsible for the excellent degradation

Keywords： ZnMn2O4     photo-chemical catalysis     bisulfite     dye degradation    

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Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 4,   Pages 493-497 doi: 10.1007/s11783-007-0079-0

Abstract: Batch experiments were carried out to investigate the promotive effect of pyridine on indole degradation

Keywords： wastewater treatment     coal-coking wastewater     promotive     degradation    

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anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 7,   Pages 893-905 doi: 10.1007/s11705-022-2290-8

Abstract: In the tap water system and simulated seawater system, the degradation time of p-nitrophenol atMoreover, the catalyst exhibited outstanding performance in the degradation experiment of four typical

Keywords： double-network hydrogel     dye degradation     silver nanoparticles     alginate    

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Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 4, doi: 10.1007/s11783-020-1346-6

Abstract:

•Wood and its reassemblies are ideal substrates to develop novel photocatalysts.

Keywords： Wood     Nanocatalysts     Photodegradation     Organic contaminants     Composites    

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Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2,   Pages 167-171 doi: 10.1007/s11705-009-0006-y

Abstract: The thermal degradation behaviors of polycarbonate/polymethylphenylsilsesquioxane (FRPC) composites wereThe isothermal kinetics equation was used to describe the thermal degradation process.The results showed that activation energy ( ), in the case of isothermal degradation, was a quick increasingisothermal condition, the addition of polymethylphenylsilsesquioxane (PMPSQ) retardanted the thermal degradationand enhanced the thermal stability of PC during the early and middle stages of thermal degradation.

Keywords： polycarbonate     polymethylphenylsilsesquioxane     thermal degradation kinetics     activation energy     lifetime    

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bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 7,   Pages 1125-1138 doi: 10.1007/s11705-021-2116-0

Abstract: (110) facet and abundant oxygen vacancies were successfully designed to enhance the photocatalytic degradationOxytetracycline (OTC) and methyl blue dyes were used as targets for pollutant degradation, and 85.6%and 96.5% photocatalytic degradation efficiencies, respectively, were observed in the optimal proportionshowed that •O2– and h+ played a major role in the process of pollutant degradationchromatography-mass spectrography was used to identify the reaction intermediates of OTC, and the possible degradation

Keywords： high-exposure (110) facet     oxygen vacancy-rich     BiOI-110/DCN heterojunction     photocatalytic degradation    

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Title Author Date Type Operation

Enhanced Poly(ethylene terephthalate) Hydrolase Activity by Protein Engineering

Yuan Ma, Mingdong Yao, Bingzhi Li, Mingzhu Ding, Bo He, Si Chen, Xiao Zhou, Yingjin Yuan

Journal Article

An investigation of local high spatial resolution adaptive PET system

Liu Jingjing,Xie Qingguo

Journal Article

F-FDG-PET glucose hypometabolism pattern in patients with epileptogenic hypothalamic hamartoma

Journal Article

4-Amino-1,8-naphthalimide based fluorescent photoinduced electron transfer (PET) pH sensors as liposomalcellular imaging agents: The effect of substituent patterns on PET directional quenching

Miguel Martínez-Calvo, Sandra A. Bright, Emma B. Veale, Adam F. Henwood, D. Clive Williams, Thorfinnur Gunnlaugsson

Journal Article

Solubility of CO in solid-state PET measured by pressure-decay method

CHEN Miaocan, ZHAO Ling, LIU Tao, WU Jiangwei, YUAN Weikang

Journal Article

Laser sintering of Cu nanoparticles on PET polymer substrate for printed electronics at different wavelengths

Juan Carlos HERNANDEZ-CASTANEDA, Boon Keng LOK, Hongyu ZHENG

Journal Article

Erratum to: On secondary new particle formation in China

Markku KULMAMA,Tuukka Petäjä,Veli-Matti KERMINEN,Joni KUJANSUU,Taina RUUSKANEN,Aijun DING,Wei NIE,Min

Journal Article

Philadelphia chromosome-positive acute myeloid leukemia with masses and osteolytic lesions: finding of 18F-FDG PET

Zhan Su, Fengyu Wu, Weiyu Hu, Xiaodan Liu, Shaoling Wu, Xianqi Feng, Zhongguang Cui, Jie Yang, Zhenguang Wang, Hongzai Guan, Hongguo Zhao, Wei Wang, Chunting Zhao, Jun Peng

Journal Article

Influence of construction-induced damage on the degradation of freeze–thawed lightweight cellular concrete

Journal Article

Efficient degradation of orange II by ZnMn

Qingzhuo Ni, Hao Cheng, Jianfeng Ma, Yong Kong, Sridhar Komarneni

Journal Article

Promotive effect of pyridine on indole degradation by activated sludge under anoxic conditions

LI Yongmei, GU Guowei, LI Wenshu

Journal Article

anchored alginate/poly(acrylic acid/acrylamide) double-network hydrogel composites for efficient catalytic degradation

Journal Article

Sustainable wood-based nanotechnologies for photocatalytic degradation of organic contaminants in aquatic

Journal Article

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

Journal Article

bismuth oxyiodide with highly exposed (110) facets on curved carbon nitride for the photocatalytic degradation

Journal Article