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Transition metal-doped heteropoly catalysts for the selective oxidation of methacrolein to methacrylic

Yanxia Zheng,Heng Zhang,Lei Wang,Suojiang Zhang,Shaojun Wang

Frontiers of Chemical Science and Engineering 2016, Volume 10, Issue 1, Pages 139-146 doi: 10.1007/s11705-015-1548-9

Abstract: The effects of the transition metals on the structure and activity of the catalysts were investigatedFTIR spectra showed that the transition metal-doped catalysts maintained the Keggin structure of thetemperature-programmed desorption and H temperature-programmed reduction results showed that the transitionmetals changed the acid and redox properties of the catalysts.

Keywords： heteropoly compounds transition metals selective oxidation methacrolein

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Epithelial-to-mesenchymal transition in cancer: complexity and opportunities

Yun Zhang, Robert A. Weinberg

Frontiers of Medicine 2018, Volume 12, Issue 4, Pages 361-373 doi: 10.1007/s11684-018-0656-6

Abstract:

The cell-biological program termed the epithelial-to-mesenchymal transition (EMT) plays an important

Keywords： epithelial-to-mesenchymal transition cancer metastasis cancer stem cell

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Phase transition regulation and caloric effect

Frontiers in Energy 2023, Volume 17, Issue 4, Pages 463-477 doi: 10.1007/s11708-023-0860-1

Abstract: worsening the performance in other aspects, like attaining a large caloric effect with narrowing the transitionperformance of materials, consisting of enlarging caloric effects, reducing hysteresis losses, adjusting transitiontemperatures, and widening transition temperature spans, which indicate that further progress can be

Keywords： phase transition regulation caloric effect solid state refrigeration

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ASSESSMENT OF HEAVY METALS IN HYDROCHAR PRODUCED BY HYDROTHERMAL CARBONIZATION OF DAIRY MANURE

Frontiers of Agricultural Science and Engineering 2023, Volume 10, Issue 3, Pages 437-447 doi: 10.15302/J-FASE-2023507

Abstract:

● Content of heavy metals in hydrochar varies considerably, from 50%

Keywords： heavy metals dairy manure hydrochar hydrothermal carbonization waste management

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Energy transition management towards a low-carbon world

Frontiers of Engineering Management 2022, Volume 9, Issue 3, Pages 499-503 doi: 10.1007/s42524-022-0201-9

Keywords： energy transition low-carbon technology system modeling transition path emission reduction

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Effect of lime on speciation of heavy metals during composting of water hyacinth

Jiwan SINGH,Ajay S. KALAMDHAD

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 1, Pages 93-102 doi: 10.1007/s11783-014-0704-7

Abstract: However, the major disadvantage of water hyacinth composting is the high content of heavy metals in thelime sludge significantly reduced most bioavailable fractions (exchangeable and carbonate) of heavy metalsTessier sequential extraction method was employed to investigate the changes in speciation of heavy metalsEffects of physicochemical parameters such as temperature, pH and organic matter on speciation of heavy metalsAddition of lime was very effective for reduction of bioavailability of heavy metals during composting

Keywords： composting lime heavy metals bioavailability factor speciation

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Smart oilfield development and transition of petroleum-based cities

He LIU, Xinhua MA

Frontiers of Engineering Management 2019, Volume 6, Issue 2, Pages 299-301 doi: 10.1007/s42524-019-0024-5

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Energy transition toward carbon-neutrality in China: Pathways, implications and uncertainties

Frontiers of Engineering Management 2023, Volume 10, Issue 2, Pages 358-372 doi: 10.1007/s42524-022-0202-8

Abstract: Achieving carbon neutrality in China before 2060 requires a radical energy transition.To identify the possible transition pathways of China’s energy system, this study presents a scenario-basedThe assessment of the relationship between the energy transition and energy return on investment (EROI) reveals that energy transition may decrease the EROI, which would trigger increased energy investmentThe results also indicate the need for backup capacities to enhance the energy security during the transition

Keywords： carbon neutrality energy transition uncertainty EROI LEAP

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Emerging roles of liquid metals in carbon neutrality

Frontiers in Energy 2022, Volume 16, Issue 3, Pages 393-396 doi: 10.1007/s11708-022-0829-5

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Human health ambient water quality criteria for 13 heavy metals and health risk assessment in Taihu Lake

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 4, doi: 10.1007/s11783-021-1475-6

Abstract:

• The concentrations of 13 heavy metals in Taihu Lake were analyzed.

Keywords： Heavy metals Human health ambient water quality criteria Taihu Lake Health risk assessment Contribution

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Policy entry points for facilitating a transition towards a low-carbon electricity future

Frontiers of Engineering Management Pages 462-472 doi: 10.1007/s42524-022-0214-4

Abstract: This study extends the ambit of the debate on electricity transition by specifically identifying possibletransformative and enduring changes can be made in the electricity and socio–economic systems to facilitate the transitionGuided by the “essence” of the multi-level perspective — a prominent framework for the study of energy transitionphase-out on coal mining regions in terms of economic development and jobs; and 4) facilitating a shift in transition

Keywords： electricity transition multi-level perspective policy entry points

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Predicting non-carcinogenic hazard quotients of heavy metals in pepper (

Marzieh Mokarram, Hamid Reza Pourghasemi, Huichun Zhang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1331-0

Abstract: Abstract • There was significant absorption of heavy metals by the pepper in contaminated soils. • TheGiven the tendency of heavy metals to accumulate in soil and plants, the purpose of this study was toFor this purpose, we measured the uptake of the four heavy metals by peppers grown in the heavy metalElectromagnetic waves were also applied for analyzing the responses of the target plants to various heavy metalsTherefore, in future studies, instead of examining the amount of heavy metals in plants by chemical analysis

Keywords： Heavy metals Plants Target Hazard Quotient (THQ) Principal Component Analysis (PCA) Random search Electromagnetic

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Re-evaluation of several heavy metals removal by natural limestones

Ali SDIRI,Samir BOUAZIZ

Frontiers of Chemical Science and Engineering 2014, Volume 8, Issue 4, Pages 418-432 doi: 10.1007/s11705-014-1455-5

Abstract: Different treatment technologies have been efficiently applied to remove heavy metals from wastewaterOn the other hand, heavy metals are the most threatening groundwater contaminants because of their toxicityThe removal of toxic metals may include different mechanisms (e.g., physisorption, chemisorptions, precipitationSorption of toxic metals (e.g., Pb, Cu, Cd, Zn, Cr, Hg, etc.) onto natural limestone involved precipitation

Keywords： limestone heavy metals sorption wastewater passive treatment technology

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Kinetic roughening transition and missing regime transition of melt crystallized polybutene-1 tetragonal

Motoi YAMASHITA

Frontiers of Chemical Science and Engineering 2009, Volume 3, Issue 2, Pages 125-134 doi: 10.1007/s11705-009-0001-3

Abstract: The kinetic roughening transition occurs around 85°C.

Keywords： isotactic polybutene-1 tetragonal phase (form Ⅱ) melt crystallization growth rate kinetic roughening morphology

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Microwave-induced high-energy sites and targeted energy transition promising for efficient energy deployment

Frontiers in Energy 2022, Volume 16, Issue 6, Pages 931-942 doi: 10.1007/s11708-021-0771-y

Abstract: In this study, a high-energy-site phenomenon and targeted-energy transition mechanism were identifiedEnergy efficiency was thereby greatly improved in the electricity-microwaves-effective heat transitionincluding microwave energy concentration and intense site-energy release, shapes a targeted-energy transitionThe microwave-induced high-energy sites and targeted energy transition provide an important pathway for

Keywords： microwave discharge high-energy sites targeted-energy transition morphology design energy efficiency