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Transformation of triclosan by a novel cold-adapted laccase from

Yuanyuan Shi, Deyang Kong, Jiayang Liu, Junhe Lu, Xiaoming Yin, Quansuo Zhou

《环境科学与工程前沿（英文）》 2017年第11卷第3期 doi: 10.1007/s11783-017-0927-5

摘要： This work investigated the transformation of triclosan (TCS) by laccase produced by a pathogen isolated from rotten tomato. The pathogen was characterized as sp. FQ, belonging to subphylum . The laccase exhibited cold-adaptation with relatively high activity at 20°C. The laccase could effectively transform TCS. Approximately 62% TCS could be removed at dose of 1.0 unit·mL in 120 min. The reaction rate appeared to be to the concentration of the substrate, suggesting the laccase activity remained stable during the reaction. Transformation products of TCS were analyzed by mass spectrometry and it was revealed that TCS dimers were formed via radical coupling pathways. During this process, laccase catalyzed oxidation of TCS to form a radical intermediate is the rate limiting step. However, this step can be reversed by humic acid. Overall, the laccase showed great potential in the treatment of phenolic contaminants. Since laccase is widely presented in natural environment, this study also revealed an important pathway involved in the transformation of phenolic contaminants in the environment.

关键词： Laccase Botrytis cinerea Triclosan Transformation Kinetics

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The transformation of PAHs in the sewage sludge incineration treatment

Hui ZHANG,Le XU,Yifei ZHANG,Mengchan JIANG

《环境科学与工程前沿（英文）》 2016年第10卷第2期页码 336-340 doi: 10.1007/s11783-014-0766-6

摘要： The release of pollutants from sewage sludge in the treatment process is a worldwide tricky problem in the field of sludge treatment. In this paper, the release and reaction between monomers of polycyclic aromatic hydrocarbons (PAHs) in the sewage sludge incineration treatment were studied based on simulated experiments. The result indicates that the transformation may occurre between monomers of PAHs during their release in the treatment. Over 90% of total PAHs in sewage sludge are released at the the temperature of 300°C–750°C. The possible transformation of Naphthalene to indeno(1, 2, 3-cd)pyrene was related to the temperature of the treatment system. Here, we showed that the output rate of transformation reactions for indeno(1, 2, 3-cd)pyrene is 94% at 300°C. These findings, by identifying corresponding treatment conditions as well as techniques, can help to understand the reactions and control real outputs of PAHs in the treatment process.

关键词： release of monomers transformation of monomers PAHs sewage sludge incineration treatment

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TRANSFORMATION OF FOOD SYSTEMS: HOW CAN IT BE FINANCED?

《农业科学与工程前沿（英文）》 2023年第10卷第1期页码 109-123 doi: 10.15302/J-FASE-2023483

摘要：

● The analysis of financing for the transformation of food systems requires first a consideration of costs.

关键词： financial markets food systems development financing consumer expenditures public budgets Sustainable Development Goals

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FOOD SYSTEMS TRANSFORMATION: CONCEPTS, MECHANISMS AND PRACTICES

《农业科学与工程前沿（英文）》 2023年第10卷第1期页码 1-3 doi: 10.15302/J-FASE-2023491

摘要： FOOD SYSTEMS TRANSFORMATION: CONCEPTS, MECHANISMS AND PRACTICES

关键词： TRANSFORMATION SYSTEMS FOOD CONCEPTS MECHANISMS

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Livelihood transformation from fishing to tourism: an adaptive sustainable livelihood framework for understanding

《农业科学与工程前沿（英文）》 doi: 10.15302/J-FASE-2024560

摘要： Livelihood transformation from fishing to tourism: an adaptive sustainable livelihood framework for understanding lakeside communities of China

关键词： communities China livelihood framework lakeside

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面向数字化转型的“互联网 +”战略升级研究

何伟,张伟东,王超贤

《中国工程科学》 2020年第22卷第4期页码 10-17 doi: 10.15302/J-SSCAE-2020.04.002

摘要：

“互联网 +”行动计划推出5年来，新一代信息技术创新进一步加快，经济社会数字化转型呈现诸多新特征，这就要求深入研究构建转型新体系和探索转型新路径，谋划“互联网 +”行动举措演进升级。本文遵循技术产业变革的客观规律，基于技术经济理论范式，着重分析了当前技术、应用和政策等层面数字化转型新态势和转型前沿实践探索。研究表明，当前数字化转型技术体系和技术能力日益完善，新的转型目标蓝图逐步显现，信息技术和实体经济融合进入新阶段，面临着重构数字化转型框架体系，强化转型关键要素、突破转型关键环节的重要任务。对此建议，在“互联网 +”行动后续政策设计、国家“十四五”规划制定的过程中，发掘数字化要素潜力，推动数字化转型生态建设，构建转型创新网络，升级“互联网 +”政策保障体系，推动经济社会数字化转型迈向更高发展水平。

关键词：技术产业变革数字化转型互联网+ 产业升级

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Improve the industrial digital transformation through Industrial Internet platforms

《工程管理前沿（英文）》 2024年第11卷第1期页码 167-174 doi: 10.1007/s42524-023-0286-9

摘要： Improve the industrial digital transformation through Industrial Internet platforms

关键词： industrial digital transformation Industrial Internet platform manufacturing big data

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Crystal-to-crystal transformation from the triclinic to the cubic crystal system by partial desolvation

Qianqian Guo, Irmgard Kalf, Ulli Englert

《化学科学与工程前沿（英文）》 2018年第12卷第3期页码 433-439 doi: 10.1007/s11705-018-1743-6

摘要：

Diffusion reaction of the labile building block Mg(acacCN)₂ (acacCN= 3-cyanoacetylacetonate) with silver salts leads to a series of solvated Mg/Ag bimetallic coordination polymers with composition [Mg(acacCN)₃Ag]·solvent. Despite their common stoichiometry, the topology of these polymers depends on the solvent of crystallization. The two-dimensional coordination compound [Mg(acacCN)₃Ag]·4CHCl₃ in space group P $\overset{&OverBar;}{1}$ is obtained as platelet-shaped crystals from a mixture of methanol and chloroform. When kept in the reaction mixture, these thin plates within one week convert to isometric tetrahedral crystals of the 3D network [Mg(acacCN)₃Ag]·2CHCl₃ in the cubic space group P2₁3. The transformation reaction proceeds via dissolution and recrystallization. The co-crystallized solvent molecules play an important role for stabilizing the target structure: They subtend Cl···Cl contacts and interact via non-classical C–H···O hydrogen bonds with the coordination framework. In the new cubic coordination network, both Mg(II) and Ag(I) adopt octahedral coordination, with unprecedented face-sharing by bridging O atoms of three acetylacetonato moieties. Prolonged standing of [Mg(acacCN)₃Ag]·2CHCl₃ in the reaction medium leads to further degradation, under formation of [Ag(acacCN)].

关键词： ditopic ligand substituted acetylacetone desolvation diffraction

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A comprehensive simulation approach for pollutant bio-transformation in the gravity sewer

Nan Zhao, Huu Hao Ngo, Yuyou Li, Xiaochang Wang, Lei Yang, Pengkang Jin, Guangxi Sun

《环境科学与工程前沿（英文）》 2019年第13卷第4期 doi: 10.1007/s11783-019-1144-1

摘要：

A comprehensive pollutant transformation model for sewer systems is established.

The model comprises fermentation, sulfate reduction and ammonification processes.

Biochemical reactions related to distinct carbon sources are depicted in the model.

Pollutant transformation is attributed to different biochemical reaction processes.

关键词： Gravity sewer Modeling Pollutant transformation Biochemical reaction process

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Promoting green transformation by ensuring food security while reducing the environmental footprint of EDITORIAL

《农业科学与工程前沿（英文）》 2024年第11卷第1期页码 1-4 doi: 10.15302/J-FASE-2024549

摘要：

Reconciling the challenges of producing adequate amounts of nutritious food for the increasing global population while limiting environmental damage that can result from operations of our food systems is an enormous challenge. In many parts of the world, agriculture is undergoing major transformations and this has been and still is particularly the case in China. In many countries, historical increases in food production have largely been achieved by increasing inputs of a range of resources, resulting in increased environmental footprints of the food produced. Agricultural development in China has resulted in unprecedented environmental degradation. Demand for food in China remains high and with an emphasis on national self-sufficiency in production of many food crops. There is an urgent need for the development of productive and more environmentally-friendly agricultural systems and improved environmental-economic-social resilience.

关键词： development transformation food security

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我国汽车产业转型升级研究

乔英俊,延建林,钟志华,赵俊玮

《中国工程科学》 2019年第21卷第3期页码 41-46 doi: 10.15302/J-SSCAE-2019.03.001

摘要：

本文全面分析了当前我国汽车产业发展面临的新形势和未来发展的新趋向，研究提出了我国汽车产业转型升级的新内涵，即：新材料、新结构、新工艺、新装备、新能源、新功能、新模式，并分析比较了我国汽车产业转型升级的四种新路径，即自主技术创新、跨界联合发展、政策资源支持、创新商业模式，最后提出了相应的发展建议。

关键词：汽车产业转型升级路径分析

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Polymorphism and crystal transformation of penicillin sulfoxide

Dingding JING, Yongli WANG, Zhijian CHEN, Lina ZHOU, Jingkang WANG

《化学科学与工程前沿（英文）》 2011年第5卷第4期页码 442-447 doi: 10.1007/s11705-011-1140-x

摘要： Penicillin sulfoxide is the intermediate for the synthesis of 7-amino-3-desacetoxycephalosporanic acid which is one of the most important nucleuses of cephalosporin antibiotic. In this contribution, two crystal structures of penicillin sulfoxide (forms I and II) were determined by X-ray diffraction, and their thermotropic properties were investigated by differential scanning calorimetry (DSC). Furthermore, the transformation of form II to form I was studied quantitatively by Raman spectroscopy, and its rates at different temperatures were determined. The results indicate that penicillin sulfoxide is more stable as form I, and the temperature plays an important role in the crystal transformation.

关键词： penicillin sulfoxide crystallization polymorphism crystal transformation Raman spectroscopy