A5003716042- Mycotoxins in Agriculture and Food
- Plant Pathogens and Fungal Diseases
- Wheat and Barley Genetics and Pathology
- Plant Disease Resistance and Genetics
- Radiation Effects and Dosimetry
- Agricultural and Food Sciences
- Nail Diseases and Treatments
- Listeria monocytogenes in Food Safety
- Plant-Microbe Interactions and Immunity
- Fungal Infections and Studies
- Fungal Biology and Applications
- Insect and Pesticide Research
- Pesticide Residue Analysis and Safety
- Nanoparticles: synthesis and applications
- Essential Oils and Antimicrobial Activity
- Carcinogens and Genotoxicity Assessment
- Antifungal resistance and susceptibility
- Plant tissue culture and regeneration
- Phytochemistry Medicinal Plant Applications
- Radioactive element chemistry and processing
- Yeasts and Rust Fungi Studies
- Plant and fungal interactions
- Fermentation and Sensory Analysis
- Enterobacteriaceae and Cronobacter Research
- Plant Disease Management Techniques
Universidade de São Paulo
2015-2025
Universidade Cidade de São Paulo
2006-2019
Universidade Estadual de Campinas (UNICAMP)
2018
National Nuclear Energy Commission
2011
Hospital Universitário da Universidade de São Paulo
2002-2008
Universidade de Santo Amaro
2007
Institute of Animal Science and Pastures
2005
Universidade Federal Rural do Rio de Janeiro
2002
Universidade Brasil
1990-2001
Instituto Biológico
2000
In this study was developed a natural process using biological system for the biosynthesis of nanoparticles (NPs) and possible removal copper from wastewater by dead biomass yeast Rhodotorula mucilaginosa. Dead live mucilaginosa used to analyze equilibrium kinetics biosorption in function initial metal concentration, contact time, pH, temperature, agitation inoculum volume. exhibited highest capacity copper, 26.2 mg g−1, which achieved within 60 min contact, at pH 5.0, temperature 30°C,...
A biological system for the biosynthesis of nanoparticles (NPs) and uptake copper from wastewater, using dead biomass Hypocrea lixii was analyzed described first time. The equilibrium kinetics investigation biosorption onto dead, dried live fungus were performed as a function initial metal concentration, pH, temperature, agitation inoculum volume. high capacity observed biomass, completed within 60 min contact, at pH 5.0, temperature 40°C speed 150 rpm with maximum 19.0 mg g−1. data better...
The use of dead biomass the fungus Hypocrea lixii as a biological system is new, effective and environmentally friendly bioprocess for production uptake nickel oxide nanoparticles (NPs), which has become promising field in nanobiotechnology. Dead was successfully used to convert ions into NPs aqueous solution. These accumulated intracellularly extracellularly on cell wall surface through biosorption. average size, morphology location were characterized by transmission electron microscopy,...
The synthesis of nickel oxide nanoparticles in film form using dead biomass the filamentous fungus Aspergillus aculeatus as reducing agent represents an environmentally friendly nanotechnological innovation. optimal conditions and capacity to uptake produce were evaluated by analyzing biosorption fungus. structural characteristics film-forming analyzed scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), photoelectron (XPS), transmission (TEM) atomic force (AFM)....
Fungal and mycotoxin contamination was investigated in field samples of nuts, shells pods the Brazil nut collected during different periods Itacoatiara, State Amazonas, Brazil: day 0, still on tree; days 5, 10 15, contact with soil for 15 days, respectively. The most prevalent fungi were Aspergillus flavus fruit nuts Fusarium spp. shells. Penicillium A. isolated from soil, air. Aflatoxins cyclopiazonic acid not detected any analyzed. high frequency isolation aflatoxigenic strains increases...
This is the first study describing rapid extracellular production of copper nanoparticles by dead biomass Trichoderma koningiopsis. The and uptake koningiopsis were characterized investigating physicochemical factors, equilibrium concentrations biosorption kinetics, combined with scanning electron microscopy (SEM), energy dispersive X-ray (EDS), transmission (TEM), photoelectron spectroscopy (XPS). A successful route for metallic synthesis was achieved, followed a Langmuir isotherm where...
This investigation was undertaken to describe a natural process for the removal of silver and simultaneous recovery Ag/Ag2O nanoparticles by dead biomass yeast Rhodotorula mucilaginosa. The ions from aqueous solution synthesis were analyzed based on physicochemical factors equilibrium concentration, combined with transmission electron microscopy (TEM), scanning (SEM), energy dispersive X-ray spectroscopy (EDS), photoelectron (XPS), infrared (FTIR). A successful obtained, following Langmuir...
Fusarium species threaten yield and quality of cereals worldwide due to their ability produce mycotoxins cause plant diseases. Trichothecenes zearalenone are the most economically significant particular concern in barley, maize wheat. For this reason, aim study was characterize isolates from brewing barley assess deoxynivalenol contamination grains. Characterization strains carried out by phylogeny based on two loci (EF-1α RPB2). Mycotoxin detection quantification were performed LC-MS. The...
The present study is a 1-year follow up of the mycoflora 140 samples Brazilian freshly harvested (10) and stored (130) sorghum, levels aflatoxin fumonisin contamination detected in grains, prevailing abiotic factors (grain moisture content, water activity, temperature, relative humidity, mean rainfall) at time sampling. results show predominance genera Phoma (57.1%), Aspergillus (42.7%), Fusarium (25.0%), Rhizopus (21.4%) presence nine other filamentous fungi. Fusarium, Aspergillus,...
Natural mycoflora and co-occurrence of fumonisins (FB1, FB2) aflatoxins (AFB1, AFB2, AFG1 AFG2) in freshly harvested corn grain samples from four regions Brazil were investigated. Fusarium verticillioides was predominant all samples. Analysis showed that 98% the contaminated with FB1 74.5% + FB2, toxin levels ranging 0.015 to 9.67 μg/g for 3.16 FB2. Twenty-one (10.5%) AFB1, seven (3.5%) AFB2 only one (0.5%) AFG2. Co-contamination observed 7% The highest contamination Nova Odessa (SP) Várzea...
Aflatoxin M1 (AFM1) is a hepatocarcinogen found in milk of animals that have consumed feeds with aflatoxin B1. The carry-over AFM1 from to Minas Frescal cheese produced or without starter cultures was determined. 40 L were divided into 10 each and assigned the following treatments for manufacture: 0.250 ng mL−1, 0.500 mL−1 + starter, starter. Quantification achieved by high performance liquid chromatography. ranged 30.64% 42.26%. There no effect storage time on AFM1. Milk levels studied may...
The aim of this study was to use a polyphasic approach identify Aspergillus section Flavi isolated from Brazil nuts collected in the Amazon forest: investigation macro- and microscopic morphology, production extrolites, heat-resistance fungi, sequencing DNA regions. following species were identified: flavus (75.5%), nomius (22.3%), parasiticus (2.2%). All A. isolates produced aflatoxins B G, but not cyclopiazonic acid (CPA). more diversified high frequency mycotoxigenic strains observed....