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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 increasingdegradation and enhanced the thermal stability of PC during the early and middle stages of thermal degradationpossible existence of a difference in nucleation, nuclei growth, and gas diffusion mechanism in the thermal

Keywords： polycarbonate     polymethylphenylsilsesquioxane     thermal degradation kinetics     activation energy     lifetime    

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Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites

RUN Mingtao, ZHANG Dayu, WU Sizhu, WU Gang

Frontiers of Chemical Science and Engineering 2007, Volume 1, Issue 1,   Pages 50-54 doi: 10.1007/s11705-007-0010-z

Abstract: An iso-conversional procedure developed by Ozawa is used to calculate the apparent activation energyIsothermal degradation results are confirmed with the nonisothermal process, in which PET/MMS showed higher thermal

Keywords： polymerization     isothermal degradation     conversion     nonisothermal degradation     activation    

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Enhanced activation of peroxymonosulfate by CNT-TiO

Xuemin Hao, Guanlong Wang, Shuo Chen, Hongtao Yu, Xie Quan

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1161-0

Abstract: In this work, a UV-light assisted peroxymonosulfate (PMS) activation system was constructed with theirradiation, the photoinduced electrons generated from TiO2 could be continuously transferred to CNT for the activationcatalytic performance was ascribed to the introduction of photoinduced electrons, which could enhance the activation

Keywords： Peroxymonosulfate activation     Carbon nanotubes     TiO2     Water treatment    

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Degradation of carbon tetrachloride in thermally activated persulfate system in the presence of formic acid

Minhui XU,Xiaogang GU,Shuguang LU,Zhouwei MIAO,Xueke ZANG,Xiaoliang WU,Zhaofu QIU,Qian SUI

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 3,   Pages 438-446 doi: 10.1007/s11783-015-0798-6

Abstract: The thermally activated persulfate (PS) degradation of carbon tetrachloride (CT) in the presence of formic acid (FA) was investigated. The results indicated that CT degradation followed a zero order kinetic model, and was responsible for the degradation of CT confirmed by radical scavenger tests. CT degradation rate increased with increasing PS or FA dosage, and the initial CT had no effect on CT degradation rate. However, the initial solution pH had effect on the degradation of CT, and the best CT degradation occurred at initial pH 6. Cl had a negative effect on CT degradation, and high concentration of Cl displayed much strong inhibition. Ten mmol·L promoted CT degradation, while 100 mmol·L inhibited the degradation of CT, but promoted CT degradation in the presence of FA. The measured Cl concentration released into solution along with CT degradation was 75.8% of the total theoretical dechlorination yield, but no chlorinated intermediates were detected. The split of C-Cl was proposed as the possible reaction pathways in CT degradation. In conclusion, this study strongly demonstrated that the thermally activated PS system in the presence of FA is a promising technique in in situ chemical oxidation (ISCO) remediation for CT contaminated site.

Keywords： persulfate     carbon tetrachloride     thermal activation     formic acid     carbon dioxide radical anion    

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Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 4,   Pages 387-394 doi: 10.1007/s11705-022-2250-3

Abstract: straightforward and effective strategy is presented for producing highly porous carbons via a self-activation

Keywords： self-activation     zinc organic salts     abundant mesopores     symmetric supercapacitor     liquid electrolyte    

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Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

Frontiers in Energy 2023, Volume 17, Issue 4,   Pages 545-554 doi: 10.1007/s11708-023-0867-7

Abstract: The effect of oxygen vacancies on the adsorption and activation of CO2 on the surface of differentThe calculations show that the oxygen vacancies contribute greatly to both the adsorption and activationFurthermore, the activation of CO2 on the ZrO2 surface where oxygen vacancies areThis finding demonstrates that the presence of oxygen vacancies promotes the activation of CO2

Keywords： CO2 activation     oxygen vacancies     ZrO2     different phases    

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A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–Hactivation

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 10,   Pages 1485-1492 doi: 10.1007/s11705-022-2169-8

Abstract: Methane activation is a pivotal step in the application of natural gas converting into high-value addedIn present work, methane activation on MgO supported Ni–M (M = Fe, Co, Cu, Pd, Pt) cluster was exploredIn addition, doping the elements of the same family, like Pd and Pt, for CH4 activation isConsequently, C–H bond activation demands a lower energy barrier on Ni–Pt cluster.This work provides insights into understanding the role of promoter metal M on thermal-catalytic activation

Keywords： CH4 dissociation     Ni–M     C–H bond activation     charge transfer    

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Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Frontiers in Energy 2016, Volume 10, Issue 4,   Pages 409-423 doi: 10.1007/s11708-016-0431-9

Abstract: This paper proposes an optimal dynamic reserve activation plan after the occurrence of an emergency situationIt considers the reserves supplied by the conventional thermal generators (spinning reserves), hydroThe proposed reserve activation approaches are solved using the genetic algorithm, and some of the simulationThese results demonstrate the advantage of the proposed integrated/dynamic reserve activation plan over

Keywords： demand-side reserves     dynamic reserve activation approach     hydro power units     post contingency     sequentialreserve activation approach     spinning reserves    

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Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Frontiers of Medicine doi: 10.1007/s11684-023-1010-1

Abstract: Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Keywords： exosomes induce activation     impair function CD19     exosomal CD19 antigen    

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Coronary leukocyte activation in relation to progression of coronary artery disease

Marijke A. de Vries,Arash Alipour,Erwin Birnie,Andrew Westzaan,Selvetta van Santen,Ellen van der Zwan,Anho H. Liem,Noëlle van der Meulen,Manuel Castro Cabezas

Frontiers of Medicine 2016, Volume 10, Issue 1,   Pages 85-90 doi: 10.1007/s11684-016-0435-1

Abstract:

Leukocyte activation has been linked to atherogenesis, but there is little in vivo We evaluated the predictive value for progression of coronary artery disease (CAD) of leukocyte activation

Keywords： coronary artery disease     inflammation     integrin     myeloperoxidase     leukocyte activation    

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NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Frontiers of Medicine 2023, Volume 17, Issue 2,   Pages 263-274 doi: 10.1007/s11684-022-0935-0

Abstract: Melanoma is the most aggressive cutaneous tumor. Neuropilin and tolloid-like 2 (NETO2) is closely related to tumorigenesis. However, the functional significance of NETO2 in melanoma progression remains unclear. Herein, we found that NETO2 expression was augmented in melanoma clinical tissues and associated with poor prognosis in melanoma patients. Disrupting NETO2 expression markedly inhibited melanoma proliferation, malignant growth, migration, and invasion by downregulating the levels of calcium ions (Ca2+) and the expression of key genes involved in the calcium signaling pathway. By contrast, NETO2 overexpression had the opposite effects. Importantly, pharmacological inhibition of CaMKII/CREB activity with the CaMKII inhibitor KN93 suppressed NETO2-induced proliferation and melanoma metastasis. Overall, this study uncovered the crucial role of NETO2-mediated regulation in melanoma progression, indicating that targeting NETO2 may effectively improve melanoma treatment.

Keywords： melanoma     neuropilin and tolloid-like 2     Ca2+/CaMKII signaling pathway    

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Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 9, doi: 10.1007/s11783-023-1706-0

Abstract:

● A CNT filter enabled effective KMnO4 activation via

Keywords： KMnO4     Carbon nanotubes     Non-radical pathway     Electron transfer     Water treatment    

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The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Frontiers of Environmental Science & Engineering 2019, Volume 13, Issue 5, doi: 10.1007/s11783-019-1158-8

Abstract: Here, the role of MnOx (as both oxidants and catalysts) in the activation of Oxone was briefly discussed

Keywords： Peroxymonosulfate     Manganese oxides     Catalyst     Oxidant    

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to water purification for resource-constrained settings: Production of activated biochar by chemical activation

Mohit Nahata, Chang Y. Seo, Pradeep Krishnakumar, Johannes Schwank

Frontiers of Chemical Science and Engineering 2018, Volume 12, Issue 1,   Pages 194-208 doi: 10.1007/s11705-017-1647-x

Abstract: temperature of 450 °C, the loading of DAP over cellulose is systematically varied, and its effect on activation

Keywords： cellulose     DAP     activation     heteroatom     microporous    

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Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 10,   Pages 1581-1592 doi: 10.1007/s11705-023-2327-7

Abstract: significant support for the rational development of catalysts with high catalytic activity for persulfate activation

Keywords： Cu–Al bimetallic oxides     mesoporous silica spheres     peroxydisulfate     bisphenol A    

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Title Author Date Type Operation

Thermal degradation kinetics and lifetime estimation for polycarbonate/polymethylphenylsilsesquioxane

Jiangbo WANG, Zhong XIN

Journal Article

Thermal decomposition of poly(ethylene terephthalate)/mesoporous molecular sieve composites

RUN Mingtao, ZHANG Dayu, WU Sizhu, WU Gang

Journal Article

Enhanced activation of peroxymonosulfate by CNT-TiO

Xuemin Hao, Guanlong Wang, Shuo Chen, Hongtao Yu, Xie Quan

Journal Article

Degradation of carbon tetrachloride in thermally activated persulfate system in the presence of formic acid

Minhui XU,Xiaogang GU,Shuguang LU,Zhouwei MIAO,Xueke ZANG,Xiaoliang WU,Zhaofu QIU,Qian SUI

Journal Article

Hierarchical porous carbon derived from one-step self-activation of zinc gluconate for symmetric supercapacitors

Journal Article

Enhanced performance of oxygen vacancies on CO adsorption and activation over different phases of ZrO

Journal Article

A density functional theory study of methane activation on MgO supported NiM cluster: role of M on C–Hactivation

Journal Article

Optimal dynamic emergency reserve activation using spinning, hydro and demand-side reserves

S. Surender REDDY,P. R. BIJWE,A. R. ABHYANKAR

Journal Article

Tumor-derived exosomes induce initial activation by exosomal CD19 antigen but impair the function of

Journal Article

Coronary leukocyte activation in relation to progression of coronary artery disease

Marijke A. de Vries,Arash Alipour,Erwin Birnie,Andrew Westzaan,Selvetta van Santen,Ellen van der Zwan,Anho H. Liem,Noëlle van der Meulen,Manuel Castro Cabezas

Journal Article

NETO2 promotes melanoma progression via activation of the Ca/CaMKII signaling pathway

Journal Article

Insights into the electron transfer mechanisms of permanganate activation by carbon nanotube membrane

Journal Article

The role of manganese oxides in the activation of peroxymonosulfate (PMS)

Jianzhi Huang, Huichun Zhang

Journal Article

to water purification for resource-constrained settings: Production of activated biochar by chemical activation

Mohit Nahata, Chang Y. Seo, Pradeep Krishnakumar, Johannes Schwank

Journal Article

Enhanced activation of persulfate using mesoporous silica spheres augmented Cu–Al bimetallic oxide particles

Journal Article