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Bior.mediation Potential of the Macr.alga Ulva lactuca (Chlor.phyta) for.Ammonium r.moval in Elastomer.Industr. Wastewater

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Advances in Bioscience and Biotechnology 2024年第6期15卷 325-343页

作者： Diego Lelis Alex Enr.ch-Pr.st camille r. chaves Thuane Mendes Anacleto r.ber.a r. C. Per.ir. Vinicius P. de Oliveir. Pr.gr.ma de Ps-Gr.duao em Biotecnologia Vegetal e Biopr.cessos Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Unidade Multiusur.o de Anlises Ambientais Universidade Federal do Rio de Janeiro Rio de Janeiro Brazil Institute of Mar.ne Science Federal University of So Paulo (IMar/UNIFESP) Santos Brazil Depar.ment of Thematic StudiesEnvir.nmental Change and Biogas Solutions r.sear.h Center.(BSr.) Linkping University Linkping Sweden Depar.ment of Mar.ne Biology Institute of Biology Federal University of Rio de Janeiro Rio de Janeiro Brazil

Dur.ng the pr.duction of nitr.le r.bber. significant amounts of nitr.gen in the for. of ammonium ar. gener.ted in the wastewater. The dischar.e of this high-nitr.gen wastewater.can lead to ser.ous envir.nmental issues, including eutr.phication, disr.ption of aquatic ecosystems, and gr.undwater.contamination. To mitigate these impacts, this r.sear.h explor.d the bior.mediation capabilities of the macr.algae Ulva lactuca (Chlor.phyta) for.r.moving nitr.gen fr.m nitr.le r.bber.pr.duction wastewater. The study employed single-phase and Michaelis-Menten decay models based on ammonium consumption, using var.ous dilutions of wastewater.to identify the optimal concentr.tion for.tr.atment. The physiological state of the macr.algae was monitor.d by measur.ng the photosynthetic capacity and specific gr.wth r.te dur.ng the exper.ments. In the pr.sence of U. lactuca, ammonium concentr.tions decr.ased in all tr.atment gr.ups, confir.ing that the ammonium kinetics confor.ed to both applied models. Our.r.sults show that U. lactuca effectively r.duces ammonium concentr.tions, with an appr.ximate r.moval r.te of 0.020 µM·g−1·min−1 acr.ss differ.nt wastewater.concentr.tions (70%, 80%, 90%, and 100%). Notably, the tr.atments with 70%, 80%, and 90% wastewater.str.ngth achieved about 67% r.duction in ammonium, demonstr.ting the alga’s capacity to tr.at high-nitr.gen wastewater. The photosynthetic per.or.ance of U. lactuca initially declined in contr.l conditions but stabilized acr.ss all tr.atments, highlighting its adaptability. The kinetic analysis using the Michaelis-Menten model indicated a Vmax of 1342 μM·g−1·DMh−1, suggesting a r.bust capacity for.ammonium uptake when fully satur.ted. Our.study under.cor.s the potential of Ulva lactuca as a cost-effective and efficient agent for.wastewater.bior.mediation, par.icular.y in settings with high nitr.gen loads.

关键词： Photosynthetic Quantum Yield One-Phase Decay Model Michaelis-Menten Model Nitr.gen Physiological Par.meter. Elastomer.

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Intestinal Obstr.ction Associated with Phar.acobezoar.in a Patient with Cr.hn’s Disease: A Case r.por.

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Sur.ical Science 2023年第7期14卷 469-473页

作者： Mar.na Gabr.elle Epstein Gabr.el Gar.ato Gabr.el Maccapani camille Diem Benatti Ivan Car.os Batista Luis Henr.que Bar.eto chaves Amanda Domit Dall’Alba Vila Nova Star.Hospital S&#227o Paulo Brazil Alber. Einstein Medical School S&#227o Paulo Brazil

Cr.hn’s disease might r.sult fr.m a complex inter.lay between genetic susceptibility, envir.nmental factor., and alter.d gut micr.biota, leading to dysr.gulated innate and adaptive immune r.sponses. The r.por.ed case pr.sents a patient with intestinal subocclusion associated with a phar.acobezoar.who had a good evolution with clinical tr.atment. This case r.por. aims to demonstr.te the complexity of diagnostic sear.h, even with the classic ver.ion of the disease. And it also comes to show the need for.a thor.ugh medical histor. and differ.ntial diagnosis investigation.

关键词： Intestinal Obstr.ction Phar.acobezoar. Cr.hn’s Disease

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