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1.
Chemosphere ; 358: 142142, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38677619

RESUMEN

The presence of non-reactive phosphorus (NRP) in environmental waters presents a potential risk of eutrophication and poses challenges for the removal of all phosphorus (P) fractions. This study presents the first investigation on the removal performance and mechanism of three model NRP compounds, sodium tripolyphosphate (STPP), adenosine 5'-monophosphate (AMP) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC), in the sediment microbial fuel cell-floating treatment wetland (SMFC-FTW). Coupling SMFC with plants proved to be effective at removing NRP via electrochemical oxidation and plant uptake, particularly the challenging-to-degrade phosphonates that contain C-P bonds. Compared with the control group, the removal efficiencies of the model NRP in SMFC were observed to increase by 11.9%-20.8%. SMFC promoted the conversion of NRP to soluble reactive phosphorus (sRP) and the transfer of P to sediment. Furthermore, the electrochemical process enhanced both plant growth and P uptake, and increased P assimilation by 72.6%. The presence of plants in the bioelectrochemical system influenced the occurrence and fate of P by efficiently assimilating sRP and supporting microbial transformation of NRP. Consequently, plants enhanced the removal efficiencies of all P fractions in the overlying water. This study demonstrated that SMFC-FTW is a promising technology to remove various NRP species in environmental waters.


Asunto(s)
Fuentes de Energía Bioeléctrica , Sedimentos Geológicos , Fósforo , Contaminantes Químicos del Agua , Humedales , Contaminantes Químicos del Agua/metabolismo , Contaminantes Químicos del Agua/análisis , Sedimentos Geológicos/química , Biodegradación Ambiental , Eutrofización , Eliminación de Residuos Líquidos/métodos
2.
Nat Prod Res ; 30(9): 1068-74, 2016.
Artículo en Inglés | MEDLINE | ID: mdl-26539898

RESUMEN

Two new triterpenoids (1-2) were isolated and elucidated from the roots of Gypsophila oldhamiana, together with four known triterpenoids (3-6). Their structures were identified to be 3ß-hydroxyolean-13(18)-ene-23, 28-dioic acid (1), 3ß, 12α-dihydroxy-23-carboxyolean-28, 13ß-olide (2), 3ß, 16α-dihydroxy-23-oxoolean-13(18)-en-28-oic acid (3), gypsogenin (4), quillaic acid (5) and gypsogenic acid (6) by spectral methods. All compounds were tested for their cytotoxicities against human tumour cell lines (lung cancer H460 and gastric cancer SGC-7901) and for their antiangiogenic effects using a zebra fish model. All compounds showed interesting antiangiogenic activities and the significant cytotoxicities against H460.


Asunto(s)
Caryophyllaceae/química , Triterpenos/análisis , Inhibidores de la Angiogénesis/farmacología , Animales , Antineoplásicos Fitogénicos/farmacología , Línea Celular Tumoral , Ensayos de Selección de Medicamentos Antitumorales , Embrión no Mamífero , Humanos , Espectroscopía de Resonancia Magnética , Ácido Oleanólico/análogos & derivados , Extractos Vegetales/química , Raíces de Plantas/química , Espectrometría de Masa por Ionización de Electrospray , Pez Cebra
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