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Hydrogen peroxide is correlated with browning in peach fruit stored at low temperature

Zhansheng DING, Shiping TIAN, Xianghong MENG, Yong XU,

《化学科学与工程前沿（英文）》 2009年 第3卷 第4期   页码 363-374 doi: 10.1007/s11705-009-0246-x

摘要： The objective of this present research is to study the biological basis of browning in peach fruit during storage at low temperatures. After being immersed in 0 or 2mmol·L salicylic acid (SA) aqueous solution for 10min, peach fruit (Prunus persica L. cv. Hongtao) were stored at 10°C, 5°C or 0°C with or without shelf life at 25°C. During storage, the progress of browning, lipid per-oxidation, phenol content, activities of polyphenol oxidase (PPO, E.C. 1.14.18.1) and guaiacol peroxidase (POD, EC 1.11.1.7), redox state of ascorbate and glutathione, as well as the content, location and metabolism of hydrogen peroxide (HO) in the fruit were examined. The results indicated that a decrease in HO content was correlated with browning, whereas phenol content and activities of PPO and POD were not correlated with the change in HO content. Moreover, HO content was influenced by different responses of antioxidants at different storage conditions. It was concluded that the main effect of HO on browning was to regulate its appearance and development as a signal molecule, and lower HO content was beneficial to browning.

关键词： beneficial     per-oxidation     appearance     decrease     hydrogen peroxide    

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DNAN的高级氧化过程研究 Article

苏海磊, Christos Christodoulatos, Benjamin Smolinski, Per Arienti, Greg O´Connor, 孟晓光

《工程（英文）》 2019年 第5卷 第5期   页码 849-854 doi: 10.1016/j.eng.2019.08.003

摘要：

2,4-二硝基茴香醚（DNAN）是用于替代2,4,6-三硝基甲苯（TNT）的钝感炸药的一种重要成分。为了研究初始pH和过氧化氢（H2O2）剂量对DNAN降解动力学和降解途径的影响，开展了DNAN的光催化H2O2氧化实验。结果显示，初始pH为4~7且H2O2剂量为1500~4500 ppm，使用UV/ H2O2处理浓度为250 ppm的DNAN溶液时，DNAN的降解服从零级反应动力学。但是，当H2O2剂量为750 ppm时，DNAN的降解服从类一级反应动力学。结果表明，DNAN易于被UV/H2O2氧化降解。当H2O2剂量为1500 ppm且初始pH为7时，3 h内DNAN浓度从250 ppm降到1 ppm以内；但3 h内总有机碳（TOC）和总碳（TC）浓度从100 ppm降到70 ppm以下，9 h后降到5 ppm以下，说明生成了其他有机化合物。这些中间产物氧化为CO2的速度慢于DNAN的氧化速度。UV/H2O2氧化过程中，生成的CO2释放到空气中，因为溶液pH迅速降低到3左右。9 h的UV/H2O2处理后，DNAN中的N绝大多数转化为硝态氮。研究表明，UV/H2O2氧化是处理DNAN废水的有效技术。

关键词： 2     4-二硝基茴香醚     高级氧化技术     废水处理     光催化    

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Interaction and combined toxicity of microplastics and per- and polyfluoroalkyl substances in aquatic

《环境科学与工程前沿（英文）》 2022年 第16卷 第10期 doi: 10.1007/s11783-022-1571-2

摘要：

● Adsorption of PFASs on MPs and its mechanisms are critically reviewed.

关键词： Microplastics     Per- and Polyfluoroalkyl substances     Adsorption     Transport     Transformation    

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Preparing construction supply chains for blockchain technology: An investigation of its potential and future directions

Algan TEZEL, Eleni PAPADONIKOLAKI, Ibrahim YITMEN, Per HILLETOFTH

《工程管理前沿（英文）》 2020年 第7卷 第4期   页码 547-563 doi: 10.1007/s42524-020-0110-8

摘要： Blockchain, a peer-to-peer, controlled, distributed database structure, has the potential to profoundly affect current business transactions in the construction industry through smart contracts, cryptocurrencies, and reliable asset tracking. The construction industry is often criticized for being slow in embracing emerging technologies and not effectively diffusing them through its supply chains. Often, the extensive fragmentation, traditional procurement structures, destructive competition, lack of collaboration and transparency, low-profit margins, and human resources are shown as the main culprits for this. As blockchain technology makes its presence felt strongly in many other industries like finance and banking, this study investigates the preparation of construction supply chains for blockchain technology through an explorative analysis. Empirical data for the study were collected through semi-structured interviews with 17 subject experts. Alongside presenting a strengths, weaknesses, opportunities, and threats analysis (SWOT), the study exhibits the requirements for and steps toward a construction supply structure facilitated by blockchain technology.

关键词： blockchain     smart contract     supply chain management     project management     construction    

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Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

《机械工程前沿（英文）》 2013年 第8卷 第1期   页码 3-9 doi: 10.1007/s11465-013-0363-6

摘要：

The study aims to devise means of obtaining polyhedral linkages for homothetic deployment of polyhedral shapes by embedding planar link groups in faces of the polyhedral shape of interest. The questions of which polyhedral shapes may be suitable for such a purpose and what are the compatibility conditions for spatially assembling planar link groups are addressed. Homohedral and tangential polyhedral shapes are found to be suitable for the task and some examples of linkages are worked out.

关键词： polyhedral linkages     homothety     homohedra     tangential polyhedra    

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Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic

《环境科学与工程前沿（英文）》 2023年 第17卷 第1期 doi: 10.1007/s11783-023-1603-6

摘要：

● Terminal carboxylate group activation is PFOA degradation’s rate-limiting step.

关键词： Heterogeneous photocatalysis     Surface frustrated Lewis pairs     Perfluorooctanoic acid     Defluorination efficiency     Environmental remediation    

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Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

《结构与土木工程前沿（英文）》 2017年 第11卷 第2期   页码 143-157 doi: 10.1007/s11709-016-0377-3

摘要： Light-frame timber buildings are often stabilized against lateral loads by using diaphragm action of roofs, floors and walls. The mechanical behavior of the sheathing-to-framing joints has a significant impact on the structural performance of shear walls. Most sheathing-to-framing joints show nonlinear load-displacement characteristics with plastic behavior. This paper is focused on the finite element modeling of shear walls. The purpose is to present a new shear connector element based on the theory of continuum plasticity. The incremental load-displacement relationship is derived based on the elastic-plastic stiffness tensor including the elastic stiffness tensor, the plastic modulus, a function representing the yield criterion and a hardening rule, and function representing the plastic potential. The plastic properties are determined from experimental results obtained from testing actual connections. Load-displacement curves for shear walls are calculated using the shear connector model and they are compared with experimental and other computational results. Also, the ultimate horizontal load-carrying capacity is compared to results obtained by an analytical plastic design method. Good agreements are found.

关键词： shear walls     wall diaphragms     finite element modelling     plastic shear connector     analytical modelling     experimental comparison    

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Phenolic compounds removal by wet air oxidation based processes

Linbi Zhou, Hongbin Cao, Claude Descorme, Yongbing Xie

《环境科学与工程前沿（英文）》 2018年 第12卷 第1期 doi: 10.1007/s11783-017-0970-2

摘要： Wet air oxidation (WAO) and catalytic wet air oxidation (CWAO) are efficient processes to degrade organic pollutants in water. In this paper, we especially reviewed the WAO and CWAO processes for phenolic compounds degradation. It provides a comprehensive introduction to the CWAO processes that could be beneficial to the scientists entering this field of research. The influence of different reaction parameters, such as temperature, oxygen pressure, pH, stirring speed are analyzed in detail; Homogenous catalysts and heterogeneous catalysts including carbon materials, transitional metal oxides and noble metals are extensively discussed, among which Cu based catalysts and Ru catalysts were shown to be the most active. Three different kinds of the reactor implemented for the CWAO (autoclave, packed bed and membrane reactors) are illustrated and compared. To enhance the degradation efficiency and reduce the cost of the CWAO process, biological degradation can be combined to develop an integrated technology.

关键词： Wet air oxidation     Catalytic wet air oxidation     Phenolic compounds     Heterogeneous catalysts     Mechanism    

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论单位生产总值钢产量及钢产量、钢铁行业的能耗、物耗和排放

陆钟武,岳强,高成康

《中国工程科学》 2013年 第15卷 第4期   页码 23-29

摘要：

单位生产总值钢产量指标对于调控钢产量，开展钢铁行业的节能、降耗和减排工作具有重要意义。首先给出了单位生产总值钢产量定义式，引入了“在役钢量”概念及其计算式；然后对单位GDP钢产量的定义式进行了两次变换，导出具有分析功能的新定义式；并以新定义式和钢产量计算式、钢铁行业能耗、物耗和排放计算式为依据，对钢产量及钢铁行业的能耗、物耗和排放进行了分析；最后，进行了与钢铁行业相关各参数的分类，并提出全面推进钢铁行业节能、降耗、减排工作的总体看法。

关键词： 单位生产总值钢产量     钢产量     在役钢     单位在役钢GDP     能耗    

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β-Cyclodextrin promoted oxidation of primary amines to nitriles in water

Dongpo SHI, Hongbing JI, Zhong LI

《化学科学与工程前沿（英文）》 2009年 第3卷 第2期   页码 196-200 doi: 10.1007/s11705-009-0051-6

摘要： A facile, efficient and substrate-selective oxidation of the primary amines with NaClO as oxidant catalyzed by cyclodextrin ( CD) has been developed in water for the first time, and the behavior of cyclodextrin that catalyzed the primary amines to nitriles in water was investigated. It was found that the primary amines which could form host-guest complexes with cyclodextrin were oxidized to nitriles with excellent yields at ambient temperature. The results show that cyclodextrin worked not only as a solubilizing agent but also as a catalyst in these reactions.

关键词： substrate-selective     amines oxidation     β-cyclodextrin    

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Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

《环境科学与工程前沿（英文）》 2021年 第15卷 第6期 doi: 10.1007/s11783-021-1416-4

摘要：

• Solvent-free chitosan oxidation is obtained by rapid mechanochemical reaction.

关键词： Chitosan     High energy ball milling     Mechanochemistry     Oxidation    

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SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

《农业科学与工程前沿（英文）》 2023年 第10卷 第2期   页码 248-261 doi: 10.15302/J-FASE-2023499

摘要：

● Establishment of a rapid tool for monitoring soil carbon sequestration in farmer fields.

关键词： 4 per 1000 initiative     carbon sequestration     climate action     farmer fields     SDG13     soil organic carbon     soil testing    

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Plasma-assisted oxidation of benzoic acid

Anna Khlyustova, Nikolay Sirotkin

《化学科学与工程前沿（英文）》 2020年 第14卷 第4期   页码 513-521 doi: 10.1007/s11705-019-1825-0

摘要： Plasma-assisted oxidation of organic compounds is one of the developing technologies for wastewater treatment. Plasmas effectively accelerate degradation processes due to plasma generated reactive species and ultra-violet radiation. Oxidation of benzoic acid in aqueous solutions by the atmospheric pressure glow discharge and underwater diaphragm discharge was studied and monitored by fluorescence and spectrophotometric methods. Discharge type and solution pH affect the formation rates of mono- and dihydroxybenzoic acids. Dihydroxyl derivatives were formed only by glow discharge action. The yields of hydroxyl radical were estimated on the kinetics data for the hydroxylation of benzoic acid. The steps of the hydroxylation processes and further oxidation were described.

关键词： atmospheric pressure glow discharge     underwater diaphragm discharge     oxidation     benzoic acid     hydroxyl radical    

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Novel coprecipitation–oxidation method for recovering iron from steel waste pickling liquor

Shejiang Liu, Hongyang Yang, Yongkui Yang, Yupeng Guo, Yun Qi

《环境科学与工程前沿（英文）》 2017年 第11卷 第1期 doi: 10.1007/s11783-017-0902-1

摘要： Coprecipitation–oxidation method was developed to recover the iron from wastewater. Fe O nanoparticles were well synthesized from steel waste pickling liquor. Promoters greatly improved the properties of synthesized Fe O nanoparticle. Real-time control of the Fe /Fe molar ratio was achieved by ORP monitoring. Waste pickling liquors (WPLs) containing high concentrations of iron and acid are hazardous waste products from the steel pickling processes. A novel combined coprecipitation–oxidation method for iron recovery by Fe O nanoparticle production from the WPLs was developed in this study. An oxidation–reduction potential monitoring method was developed for real-time control of the Fe /Fe molar ratio. The key coprecipitation–oxidation parameters were determined using the orthogonal experimental design method. The use of promoters greatly improved the Fe O nanoparticle crystallinity, size, magnetization, and dispersion. X-ray diffraction patterns showed that the produced Fe O nanoparticles were single phase. The Fe O nanoparticles were approximately spherical and slightly agglomerated. Vibrating sample magnetometry showed that the Fe O nanoparticles produced from the WPLs had good magnetic properties, with a saturation magnetization of 80.206 emu·g and a remanence of 10.500 emu·g . The results show that this novel coprecipitation–oxidation method has great potential for recycling iron in WPLs.

关键词： Waste pickling liquor     Coprecipitation–oxidation     Fe3O4 nanoparticles     Oxidation–reduction potential     Promoter    

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Electricity-driven ammonia oxidation and acetate production in microbial electrosynthesis systems

《环境科学与工程前沿（英文）》 2022年 第16卷 第4期 doi: 10.1007/s11783-021-1476-5

摘要：

• MES was constructed for simultaneous ammonia removal and acetate production.

关键词： Biocathode     Carbon dioxide     Electrochemical oxidation     Graphite anode     Boron-doped diamond    

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标题 作者 时间 类型 操作

Hydrogen peroxide is correlated with browning in peach fruit stored at low temperature

Zhansheng DING, Shiping TIAN, Xianghong MENG, Yong XU,

期刊论文

DNAN的高级氧化过程研究

苏海磊, Christos Christodoulatos, Benjamin Smolinski, Per Arienti, Greg O´Connor, 孟晓光

期刊论文

Interaction and combined toxicity of microplastics and per- and polyfluoroalkyl substances in aquatic

期刊论文

Preparing construction supply chains for blockchain technology: An investigation of its potential and future directions

Algan TEZEL, Eleni PAPADONIKOLAKI, Ibrahim YITMEN, Per HILLETOFTH

期刊论文

Polyhedral linkages obtained as assemblies of planar link groups

GÖkhan KİPER, Eres SÖYLEMEZ

期刊论文

Photo-induced surface frustrated Lewis pairs for promoted photocatalytic decomposition of perfluorooctanoic

期刊论文

Modeling of shear walls using finite shear connector elements based on continuum plasticity

Ulf Arne GIRHAMMAR, Per Johan GUSTAFSSON, Bo KÄLLSNER

期刊论文

Phenolic compounds removal by wet air oxidation based processes

Linbi Zhou, Hongbin Cao, Claude Descorme, Yongbing Xie

期刊论文

论单位生产总值钢产量及钢产量、钢铁行业的能耗、物耗和排放

陆钟武,岳强,高成康

期刊论文

β-Cyclodextrin promoted oxidation of primary amines to nitriles in water

Dongpo SHI, Hongbing JI, Zhong LI

期刊论文

Solvent-free mechanochemical mild oxidation method to enhance adsorption properties of chitosan

期刊论文

SOIL CARBON CHECK: A TOOL FOR MONITORING AND GUIDING SOIL CARBON SEQUESTRATION IN FARMER FIELDS

期刊论文

Plasma-assisted oxidation of benzoic acid

Anna Khlyustova, Nikolay Sirotkin

期刊论文

Novel coprecipitation–oxidation method for recovering iron from steel waste pickling liquor

Shejiang Liu, Hongyang Yang, Yongkui Yang, Yupeng Guo, Yun Qi

期刊论文

Electricity-driven ammonia oxidation and acetate production in microbial electrosynthesis systems

期刊论文