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Lower blood malondialdehyde is associated with past pesticide exposure:findings in Gulf War illness and healthy controls

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Military Medical Research 2022年第2期9卷 205-214页

作者： beatrice alexandra golomb Sridevi Devaraj Alexis K.Messner Hayley Jean Koslik Jun Hee Han Barnabas Yik Department of Medicine School of MedicineUniversity of CaliforniaSan DiegoLa JollaCA 92093USA Department of Pathology and Immunology Baylor College of MedicineHoustonTX 77030USA Swedish Medical Center SeattleWA 98109USA Henry M.Jackson Foundation for the Advancement of Military Medicine San DiegoCA 92134USA Santa Clara Valley Medical Center San JoseCA 95128USA

Background: Malondialdehyde(MDA) is a candidate general marker of oxidative stress(OS). We sought to assess the relation of MDA to Gulf War illness(GWI) and to a variety of ***: This is an observational study involving subjects from Southern California recruited from October 2011 to May 2014. MDA was assessed in 81 participants(41 GWI-cases, 40 controls). General and Gulf-specific exposures were elicited. MDA case–control comparison was restricted to 40 matched pairs. The potential association between MDA and exposures was assessed using regression analyses. Gulf-specific exposures were incorporated into a case-specific ***: Plasma MDA was significantly lower in GWI-cases than controls. Composite pesticide and fuel-solvent exposures negatively predicted MDA in the total sample, as well as in the analyses that included either GWI-cases or controls only. Self-reported exposure to organophosphate(OP) nerve gas was a strong predictor for lower MDA level in veterans with ***: Past pesticide exposures predicted lower MDA in both veterans with GWI and in healthy controls.

关键词： Malondialdehyde Oxidative stress Free radical Gulf War veterans Gulf War illness Pesticide

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Utilization of Pineapple Crown Fiber and Recycled Polypropylene for Production of Sustainable Composites

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Journal of Renewable Materials 2020年第10期8卷 1327-1341页

作者： alexandra Augusta Reichert Mariana Ribas de Sá Gabriela Escobar Hochmuller da Silva Cesar Augusto Gonçalves beatrice AndréRicardo Fajardo Amanda Dantas de Oliveira Postgraduate Program in Materials Science and Engineering(PPGCEM) Federal University of Pelotas(UFPel)Pelotas96075-630Brazil Technology Development Center(CDTec) Materials EngineeringFederal University of Pelotas(UFPel)Pelotas96075-630Brazil Postgraduate Program in Materials Science and Engineering(PPGCEM) Federal University of São Carlos(UFSCar)São Carlos13565-905Brazil Laboratory of Technology and Development of Composites and Polymeric Materials Federal University of Pelotas(UFPel)Pelotas96010-900Brazil

Nowadays,the production of consumer goods is based on the use of non-renewable raw materials,which in recent years has been performing as a problem for the *** the large number of available biofibers in nature,their use in the development of polymeric composites has inevitably emerged,it is also necessary to take into account the countless discarded plastics that still have the potential to be *** this work,fibers were extracted from pineapple crown residues and utilized to compose sustainable composites using recycled polypropylene from cups discarded in the trash as a ***,it is known that for good performance,it is necessary to achieve a good chemical interaction between the fiber and the *** order to improve this interaction,alkaline mercerization treatment was carried out on the surface of the fibers removing some components incompatible with the *** this work,the effect of the mercerization treatment on the properties of the fibers was studied,as well as their interaction with the *** effect of fiber concentration on the mechanical and thermal properties of composites was also *** of 5 and 7 wt%were used for both natural and mercerized fibers.A decrease in the number of degradation stages was observed through thermogravimetry analyses(from four in natural fiber to two in mercerized fibers),showing that the mercerization performed on the fibers was *** increase in the degree of crystallinity of mercerized fibers was also observed through the results of X-ray *** techniques indicate that amorphous compounds,such as hemicellulose and lignin,were partially *** the tensile test,it could be noted that all composites presented higher values of de elastic modulus than recycled polypropylene without added load;however,there were no differences in the elastic modulus between the different types of fibers and load ***,it is interesting to use fibers as r

关键词： Recycling composites polypropylene biofibers pineapple crown

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