title: Antimutagenic and antioxidant activities of quebracho phenolics (Schinopsis balansae) recovered from tannery wastewaters.
abstract: Quebracho extracts are used in tannery due to their high concentration of phenolics. The Mexican tannery industry uses around 450 kg/m(3) of which, 150 kg/m(3) remains in wastewaters and are discharged in drain pipe systems or rivers. The quebracho phenolics recovered from tannery wastewater (QPTW) was characterized by HPLC. The antimutagenic and antioxidant activities as well as the microbiological quality were evaluated. Total phenolic content of QPTW was 621mg catechin equivalent/g sample. Gallic and protocatechuic acids were the major components characterized by HPLC. QPTW showed an inhibition range on aflatoxin B(1) mutagenicity from 16 to 60% and was dose-dependent. Antioxidant activity (defined as beta-carotene bleaching) of QPTW (64.4%) at a dose of 12.3mg/mL was similar to that of BHT (68.7%) at a dose of 0.33 mg/mL, but lower than Trolox (90.8% at a dose of 2.5mg/mL); meanwhile antiradical activity (measured as reduction of DPPH) (60.8%) was higher than that of BHT (50.8%) and Trolox (34.2%). Quebracho residues were demonstrated to be an outstanding source of phenolic acids and for research and industrial uses.
authors.affiliation: Departamento de Ingeniería Bioquímica, Instituto Tecnológico de Celaya, Celaya, Gto, Mexico.
authors.forename: Raúl
authors.initials: R
authors.lastname: Marín-Martinez
authors.forename: Rafael
authors.initials: R
authors.lastname: Veloz-García
authors.forename: Rafael
authors.initials: R
authors.lastname: Veloz-Rodríguez
authors.forename: Salvador H
authors.initials: SH
authors.lastname: Guzmán-Maldonado
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Loarca-Pina
authors.forename: Anabertha
authors.initials: A
authors.lastname: Cardador-Martinez
authors.forename: Lorenzo
authors.initials: L
authors.lastname: Guevara-Olvera
authors.forename: Rita
authors.initials: R
authors.lastname: Miranda-López
authors.forename: Irineo
authors.initials: I
authors.lastname: Torres-Pacheco
authors.forename: Cristina Pérez
authors.initials: CP
authors.lastname: Pérez
authors.forename: Guadalupe
authors.initials: G
authors.lastname: Herrera-Hernández
authors.forename: Francisco
authors.initials: F
authors.lastname: Villaseñor-Ortega
authors.forename: Mario
authors.initials: M
authors.lastname: González-Chavira
authors.forename: Ramón G
authors.initials: RG
authors.lastname: Guevara-Gonzalez
mesh_terms: D027926:Anacardiaceae / Q000378:metabolism*; D016587:Antimutagenic Agents / Q000008:administration & dosage*; D000975:Antioxidants / Q000008:administration & dosage*; D002470:Cell Survival / Q000187:drug effects; D007220:Industrial Waste / Q000517:prevention & control; D009154:Mutation / Q000187:drug effects; D010636:Phenols / Q000008:administration & dosage* / Q000737:chemistry; D010936:Plant Extracts / Q000008:administration & dosage; D012486:Salmonella typhimurium / Q000166:cytology / Q000187:drug effects* / Q000235:genetics*; D013633:Tanning; D014874:Water Pollutants, Chemical / Q000008:administration & dosage* / Q000302:isolation & purification
chemical_list: D016587:Antimutagenic Agents; D000975:Antioxidants; D007220:Industrial Waste; D010636:Phenols; D010936:Plant Extracts; D014874:Water Pollutants, Chemical