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M Measson - One of the best experts on this subject based on the ideXlab platform.
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valorization of wastepaper sludge ash as Main Component of hydraulic road binder
Waste and Biomass Valorization, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:This paper deals with the valorization of wastepaper sludge ash (WSA) as the Main Component of Hydraulic Road Binder (HRB). The physical, chemical and mineralogical characteristics of this WSA were studied and this characterization was completed by a study of the reactivity of WSA in presence of lime and gypsum. This study led to the optimization of HRB rich in WSA whose characteristics were tested on mortars and on samples of treated soil. The characterization of WSA and the study of its reactivity showed that WSA had hydraulic properties because of the presence of hydraulic minerals: lime (CaO), mayenite (Ca12Al14O33) and α′-Ca2SiO4. The compressive strength of WSA-containing mortars was strongly penalized by the high water demand of the ash but this was not the case for the samples of treated soils. The results obtained on clayey soil treated by a binder optimized by the addition of 20 wt% of gypsum were better than those obtained with conventional commercial binders: their behavior was comparable in the long term but the optimized binder was more efficient in the short term. All the results obtained in this study permit us to conclude that WSA is suitable for use as the Main Component of HRB. This study is a good example of waste valorization: firstly, the calorific value of sludge produced by the paper recycling industry is recovered at the industrial plant and, secondly, the ash formed during this incineration process is reused as the Main Component of HRB with interesting added value.
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utilization of a natural pozzolan as the Main Component of hydraulic road binder
Construction and Building Materials, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:Abstract This paper deals with the utilization of a natural pozzolan as the Main Component of Hydraulic Road Binder (HRB). A study of its reactivity in presence of lime and gypsum leads to a proposal for an optimized binder composed of 80 wt% pozzolan, 15 wt% lime and 5 wt% gypsum. The characteristics of this binder were tested on mortars and on samples of treated soil and the results lead to the conclusion that it is possible to produce an HRB rich in pozzolan and without cement that can efficiently stabilize clayey soils.
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Utilization of a natural pozzolan as the Main Component of hydraulic road binder
Construction and Building Materials, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:This paper deals with the utilization of a natural pozzolan as the Main Component of Hydraulic Road Binder (HRB). A study of its reactivity in presence of lime and gypsum leads to a proposal for an optimized binder composed of 80 wt% pozzolan, 15 wt% lime and 5 wt% gypsum. The characteristics of this binder were tested on mortars and on samples of treated soil and the results lead to the conclusion that it is possible to produce an HRB rich in pozzolan and without cement that can efficiently stabilize clayey soils. (C) 2012 Elsevier Ltd. All rights reserved.
John J Finlayjones - One of the best experts on this subject based on the ideXlab platform.
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terpinen 4 ol the Main Component of the essential oil of melaleuca alternifolia tea tree oil suppresses inflammatory mediator production by activated human monocytes
Inflammation Research, 2000Co-Authors: Prue H Hart, C Brand, Christine F Carson, Thomas V Riley, Rolf H Prager, John J FinlayjonesAbstract:Objective and Design: To evaluate potential anti-inflammatory properties of tea tree oil, the essential oil steam distilled from the Australian native plant, Melaleuca alternifolia.¶Material and Methods: The ability of tea tree oil to reduce the production in vitro of tumour necrosis factor-α (TNFα), interleukin (IL)-1β, IL-8, IL-10 and prostaglandin E2 (PGE2) by lipopolysaccharide (LPS)-activated human peripheral blood monocytes was examined.¶Results: Tea tree oil emulsified by sonication in a glass tube into culture medium containing 10% fetal calf serum (FCS) was toxic for monocytes at a concentration of 0.016% v/v. However, the water soluble Components of tea tree oil at concentrations equivalent to 0.125% significantly suppressed LPS-induced production of TNFα, IL-1β and IL-10 (by approximately 50%) and PGE2 (by approximately 30%) after 40 h. Gas chromatography/ mass spectrometry identified terpinen-4-ol (42%), α-terpineol (3%) and 1,8-cineole (2%, respectively, of tea tree oil) as the water soluble Components of tea tree oil. When these Components were examined individually, only terpinen-4-ol suppressed the production after 40 h of TNFα, IL-1β, IL-8, IL-10 and PGE2 by LPS-activated monocytes. Conclusion: The water-soluble Components of tea tree oil can suppress pro-inflammatory mediator production by activated human monocytes.
Francesca Mondello - One of the best experts on this subject based on the ideXlab platform.
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terpinen 4 ol the Main Component of melaleuca alternifolia tea tree oil inhibits the in vitro growth of human melanoma cells
Journal of Investigative Dermatology, 2004Co-Authors: Annarica Calcabrini, Annarita Stringaro, Laura Toccacieli, Stefania Meschini, Manuela Marra, Marisa Colone, Giuseppe Arancia, Agnese Molinari, Giuseppe Salvatore, Francesca MondelloAbstract:The search for innovative therapeutic approaches based on the use of new substances is gaining more interest in clinical oncology. In this in vitro study the potential anti-tumoral activity of tea tree oil, distilled from Melaleuca alternifolia, was analyzed against human melanoma M14 WT cells and their drug-resistant counterparts, M14 adriamicin-resistant cells. Both sensitive and resistant cells were grown in the presence of tea tree oil at concentrations ranging from 0.005 to 0.03%. Both the complex oil (tea tree oil) and its Main active Component terpinen-4-ol were able to induce caspase-dependent apoptosis of melanoma cells and this effect was more evident in the resistant variant cell population. Freeze-fracturing and scanning electron microscopy analyses suggested that the effect of the crude oil and of the terpinen-4-ol was mediated by their interaction with plasma membrane and subsequent reorganization of membrane lipids. In conclusion, tea tree oil and terpinen-4-ol are able to impair the growth of human M14 melanoma cells and appear to be more effective on their resistant variants, which express high levels of P-glycoprotein in the plasma membrane, overcoming resistance to caspase-dependent apoptosis exerted by P-glycoprotein-positive tumor cells.
P Segui - One of the best experts on this subject based on the ideXlab platform.
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valorization of wastepaper sludge ash as Main Component of hydraulic road binder
Waste and Biomass Valorization, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:This paper deals with the valorization of wastepaper sludge ash (WSA) as the Main Component of Hydraulic Road Binder (HRB). The physical, chemical and mineralogical characteristics of this WSA were studied and this characterization was completed by a study of the reactivity of WSA in presence of lime and gypsum. This study led to the optimization of HRB rich in WSA whose characteristics were tested on mortars and on samples of treated soil. The characterization of WSA and the study of its reactivity showed that WSA had hydraulic properties because of the presence of hydraulic minerals: lime (CaO), mayenite (Ca12Al14O33) and α′-Ca2SiO4. The compressive strength of WSA-containing mortars was strongly penalized by the high water demand of the ash but this was not the case for the samples of treated soils. The results obtained on clayey soil treated by a binder optimized by the addition of 20 wt% of gypsum were better than those obtained with conventional commercial binders: their behavior was comparable in the long term but the optimized binder was more efficient in the short term. All the results obtained in this study permit us to conclude that WSA is suitable for use as the Main Component of HRB. This study is a good example of waste valorization: firstly, the calorific value of sludge produced by the paper recycling industry is recovered at the industrial plant and, secondly, the ash formed during this incineration process is reused as the Main Component of HRB with interesting added value.
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utilization of a natural pozzolan as the Main Component of hydraulic road binder
Construction and Building Materials, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:Abstract This paper deals with the utilization of a natural pozzolan as the Main Component of Hydraulic Road Binder (HRB). A study of its reactivity in presence of lime and gypsum leads to a proposal for an optimized binder composed of 80 wt% pozzolan, 15 wt% lime and 5 wt% gypsum. The characteristics of this binder were tested on mortars and on samples of treated soil and the results lead to the conclusion that it is possible to produce an HRB rich in pozzolan and without cement that can efficiently stabilize clayey soils.
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Utilization of a natural pozzolan as the Main Component of hydraulic road binder
Construction and Building Materials, 2013Co-Authors: P Segui, Jeanemmanuel Aubert, Bernard Husson, M MeassonAbstract:This paper deals with the utilization of a natural pozzolan as the Main Component of Hydraulic Road Binder (HRB). A study of its reactivity in presence of lime and gypsum leads to a proposal for an optimized binder composed of 80 wt% pozzolan, 15 wt% lime and 5 wt% gypsum. The characteristics of this binder were tested on mortars and on samples of treated soil and the results lead to the conclusion that it is possible to produce an HRB rich in pozzolan and without cement that can efficiently stabilize clayey soils. (C) 2012 Elsevier Ltd. All rights reserved.
Prue H Hart - One of the best experts on this subject based on the ideXlab platform.
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terpinen 4 ol the Main Component of the essential oil of melaleuca alternifolia tea tree oil suppresses inflammatory mediator production by activated human monocytes
Inflammation Research, 2000Co-Authors: Prue H Hart, C Brand, Christine F Carson, Thomas V Riley, Rolf H Prager, John J FinlayjonesAbstract:Objective and Design: To evaluate potential anti-inflammatory properties of tea tree oil, the essential oil steam distilled from the Australian native plant, Melaleuca alternifolia.¶Material and Methods: The ability of tea tree oil to reduce the production in vitro of tumour necrosis factor-α (TNFα), interleukin (IL)-1β, IL-8, IL-10 and prostaglandin E2 (PGE2) by lipopolysaccharide (LPS)-activated human peripheral blood monocytes was examined.¶Results: Tea tree oil emulsified by sonication in a glass tube into culture medium containing 10% fetal calf serum (FCS) was toxic for monocytes at a concentration of 0.016% v/v. However, the water soluble Components of tea tree oil at concentrations equivalent to 0.125% significantly suppressed LPS-induced production of TNFα, IL-1β and IL-10 (by approximately 50%) and PGE2 (by approximately 30%) after 40 h. Gas chromatography/ mass spectrometry identified terpinen-4-ol (42%), α-terpineol (3%) and 1,8-cineole (2%, respectively, of tea tree oil) as the water soluble Components of tea tree oil. When these Components were examined individually, only terpinen-4-ol suppressed the production after 40 h of TNFα, IL-1β, IL-8, IL-10 and PGE2 by LPS-activated monocytes. Conclusion: The water-soluble Components of tea tree oil can suppress pro-inflammatory mediator production by activated human monocytes.
