Lucia M. Valente Soares's research while affiliated with University of Campinas and other places

Publications (18)

Article
Full-text available
Five samplings of leaf vegetables widely consumed in Southern Brazil (lettuce, rucola, watercress, kale, chicory, Chinese cabbage, and cabbage) were taken during the period of a year in food markets of the city of Campinas, Brazil. A selective extraction of potassium, sodium, calcium, magnesium, iron, manganese, copper, and zinc was conducted on th...
Article
Full-text available
Tomatoes are highly susceptible to fungi contamination in the field, during transportation, processing, and storage. Aspergillus flavus and Aspergillus parasiticus have been isolated from tomatoes and tomato products, and both fungi species can produce aflatoxin, mycotoxin with hepatotoxic, carcinogenic, teratogenic, and mutagenic effects on all an...
Article
Full-text available
Samples of beer made in Brazil were analyzed for the presence of fumonisin B, (FBI) and ochratoxin A (OTA). FB(1) was searched for in 58 beer samples from 30 plants located in nine states. The samples were concentrated and cleaned up with strong ion exchange column, derivatized with OPA and analyzed by HPLC with fluorescence detection. The limit of...
Article
Full-text available
Levantamentos de ocorrência de micotoxinas em alimentos foram realizados nas últimas duas décadas nas regiões Sudeste e Sul do Brasil. Levantamentos em alimentos comercializados em outras regiões têm-se limitado a aflatoxinas em amendoim e castanhas do Brasil. O presente trabalho pesquisou a presença de fumonisina B1, aflatoxinas B1, B2, G1 e G2, o...
Article
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O verdadeiro espinafre (Spinacia oleracea) não se desenvolve bem em climas quentes e por esta razão não é comercializado no Brasil. Em seu lugar, um substituto de espinafre (Tetragonia expansa), originário da Nova Zelândia, é amplamente utilizado. A informação sobre o perfil mineral é resumida e inexistente sobre a fração solúvel de minerais deste...
Article
Full-text available
Information on the composition of Brazilian foods is scant. Concentrate fruit juices commercialized in glass bottles are widely used by Brazilian families. The present work eight nutritionally important elements (K, Na, Ca, Mg, Fe, Zn, Cu, Mn) in commercial concentrated fruit juices, pineapple (3 brands), West Indian cherry (2 brands), cashew (5 br...
Article
Butterhead lettuce, rucola, watercress, kale, chicory, cabbage, Chinese cabbage, and a spinach substitute (Tetragonia expansa) are widely consumed in Southern Brazil. Samples were collected five times during a year in food markets and analyzed for total potassium, sodium, calcium, magnesium, iron, manganese, copper, and zinc by flame atomic absorpt...
Article
Fifty-six Brazilian commercial maize cultivars were examined for FB1 and FB2 accumulation after two non-consecutive growing seasons. During the 94/95 growing season 35 cultivars were planted at three locations in the state of São Paulo, Brazil. All samples (total of 105) were contaminated (0.10 micro/g-6.58 microg/g FB1 and 0.04 microg/g-2.15 micro...
Article
Alternariol (AOH), alternariol monomethyl ether (AME) and tenuazonic acid (TEA) are secondary metabolites of Alternaria species. Cyclopiazonic acid (CPA) is produced by fungi belonging to the ubiquitous genera of Penicillium and Aspergillus and has been found in a wide range of foods. These toxins were searched for by liquid chromatography with dio...
Article
Past surveys indicated that the occurrence of aflatoxins, zearalenone and ochratoxin A was not a problem in corn and corn products in the state of São Paulo, Brazil. However, according to recent studies, a change in pattern has been detected. To obtain a better overview, these toxins were searched for in 110 samples of freshly harvested corn, corre...
Article
Eighty-one samples of corn products were acquired from markets and supermarkets in the city of Campinas, SP, Brazil, and were analysed for fumonsins B1 and B2 (FB1 and FB2). Forty samples (49%) were positive for FB1 (0.03-4.93 (micrograms/g) and 44 samples (54%) for FB2 (0.02-1.38 (micrograms/g). The samples, in order of decreasing contamination, w...
Article
Thirty-four samples of roast and ground coffee, 14 samples of instant coffee and two samples of decaffeinated instant coffee were collected in markets and supermarkets in the city of Campinas, Brazil, and analysed for ochratoxin A using immunoaffinity columns for clean-up and HPLC with fluorescence detection for quantification. The limit of detecti...
Article
A procedure for the simultaneous determination of the mycotoxins tenuazonic acid (TEA) and cyclopiazonic acid (CPA) is presented for the first time. It has been applied to tomato products and involves simple extraction, defatting and partitioning steps followed by metal complexation chromatography on a reverse phase C18 column. The quantification l...
Article
Fumonisins B1 (FB1) and B2 (FB2) were determined in 35 samples of corn flour and corn grits destined for human consumption and purchased directly from Buenos Aires food shops and supermarkets from October 1996 to January 1997 and during the month of January 1998. During the first period of sample collecting, 16 out of 19 samples were found to be co...
Article
Wheat from two cultivars with contrasting characteristics were harvested in ten experimental plots located in wheat producing areas of the State of São Paulo, Brazil. The samples (10 of each cultivar) were analyzed by a gas-chromatographic method for deoxynivalenol (DON), nivalenol (NIV), diacetoxyscirpenol (DAS), toxins T-2 (T-2) and HT-2, T-2 tet...
Article
Samples of wheat harvested from 1988 to 1990 and stored in elevators in the south of Brazil (12 Brazilian, 4 Argentinian and 2 Uruguayan) were analysed in 1990 for 14 mycotoxins: deoxynivalenol (DON), nivalenol, diacetoxyscirpenol (DAS), T-2 and HT-2 toxins, T-2 triol, T-2 tetraol, aflatoxins B1, B2, G1, G2, ochratoxin A (OCHRA A), zearalenone and...
Article
A capillary gas chromatographic method with flame ionization detection was evaluated for quantitation and confirmation of 7 trichothecenes known to occur in grain crops. The method was applied to spiked and naturally contaminated wheat samples. Samples were extracted with methanol-aqueous KCI. After clarification with ammonium sulfate and partition...

Citations

... Thin-layer chromatography (TLC) was mainly used in the past but lacks sufficient sensitivity and specificity (Gimeno, 1979;Nowotny et al., 1983;Anaya et al., 2004). Gas chromatography (GC) followed by flame ionisation detection (FID) (Bata et al., 1983;Furlong and Valente Soares, 1995) and by electron capture detection (ECD) (Cohen and Lapointe, 1984) have been reported. GC coupled to mass spectrometric (MS and MS/MS) detection is still popular (Thrane et al., 2004;Schollenberger et al., 2011;Rodr ıguez-Carrasco et al., 2013a,b;Escriv a et al., 2015). ...
... Humidity clearly plays an important role in fumonisin contamination. High levels of fumonisins have been reported under hot and dry weather conditions (Shelby et al. 1994), whereas high levels of fumonisins were associated with high RH in Argentina (Hennigen et al. 2000). ...
... Several studies included fungal species of the genera Aspergillus and Penicillium as the mycotoxigenic agents, considered important in the food industry, mainly with respect to cereal grains and oilseeds (RESTAINO et al., 1995;MCKENZIE et al., 1998;KELLS et al., 2001;MURPHY et al., 2006;KORZUN et al., 2008;KUMAR et al., 2008;McDONOUGH et al., 2011;ALENCAR et al., 2012). Several researchers have reported that these two genera include the species showing significant mycotoxigenic potential, most commonly found in stored maize grains (LAZZARI, 1993;KAWASHIMA;SOARES, 2006). ...
... Fruit juice helps children to fulfill the recommendation to eat more fruits and vegetables and its consumption accounts for 50% of all fruit servings consumed by children [1]. In the last decades, fruit juice consumption by preschoolers has increased in many countries including Brazil [1][2][3]. Although fruit juices have known nutritional beneficial aspects, they may also be detrimental [4]. ...
... Cereals are the most typically contaminated food category (rice, wheat, barley, maize, rye, oat, and millet). FB1 has been found in a variety of dietary products, including asparagus and garlic [102], barley foods [103], beers [104], dried figs [105], and milk [106]. Some of the most typically contaminated foods by FB1 are maize (Zea mays L.) and maize-based products [107]. ...
... Alternative decontamination methods have been proposed such a high-pressure pasteurizing (HPP) however, studies have found it less effective than blanching [49,55]. Blanching remains the best commercial tool available to reduce the microbial load of BSFL, although special consideration would need to be placed on the endospore forming bacteria to ensure they remain below legislated limits [12,49,[55][56][57][58]. Technologies, such as high-pressure pasteurizing in combination with a heat treatment can be effective in reducing bacterial spores, although it typically has poor consequences on the organoleptic properties of the food [56]. ...
... (Kos et al. 2016). Mariutti and Soares (2009) also evaluated the existence of aflatoxins in different tomato-based products, including ketchup, pulp paste, and puree. According to their results, all aflatoxin levels of the samples were found to be within recommended limits. ...
... The occurrence of AFs and FBs in samples of corn, soybean meal and finished feed (freshly prepared and stored in the farms) is presented in table 1. The frequency of samples containing quantifiable levels of AFs in corn samples (65%) was similar to the value reported (55%) in samples of freshly harvested maize in the State of São Paulo, with a highest concentration of AFB 1 of 1,600μg/kg (MACHINSKI et al., 2001). However, the mean value of total AFs for corn in the present study was 29.1±24.4μg/kg, ...
... García-Herreraa et al. (2014) shown that chicory contained higher K and Mn than dandelion, but lower Ca, Cu, Fe, Mn. Also, chicory leaves had 30% more Fe, but 50% less Cu than spinach (Lisiewska et al. 2009;Kawashima and Soares 2003). As can be seen from these results, mineral content of chicory can vary considerably, which is attributable to genotype and ecological conditions, maintenance, maturity, as well as the use of wild or cultivars. ...
... Insofar, CPA has been detected in various foods of plant origin, such as peanut, corn, figs, rice, wheat and tomato, but also in foods of animal origin, such as cheese, milk and ham (Oliveira et al., 2006;da Motta & Valente Soares, 2000;Fernández Pinto et al., 2001;Ostry et al., 2018;Peromingo et al., 2018). However, research on the incidence of CPA in different types of meat products is very limited, although some authors emphasise the possibility of its substantial occurrence in meat products, even in high concentrations (Alapont et al., 2014;Bailly et al., 2005;Bailly & Guerre, 2009). ...