Santa Fe de la Vera Cruz, Argentina

University of Latinamerican Education Centre
Santa Fe de la Vera Cruz, Argentina
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Aimaretti N.R.,National University of Santa | Aimaretti N.R.,University of Latinamerican Education Centre | Ybalo C.V.,University of Latinamerican Education Centre | Rojas M.L.,Spanish University for Distance Education (UNED) | And 2 more authors.
Bioresource Technology | Year: 2012

A revalorization of discarded carrots as substrate for the production of second-generation ethanol is proposed. In order to increase the fermentable sugar concentration of the musts two strategies were studied: Strategy 1 consisted in the enzymatic hydrolysis of bagasse must and Strategy 2 by which carrots were milled, dropped into distilled water and hydrolyzed with different enzymes prior to compressing and filtering to obtain carrot must. By applying Strategy 2 using 0.05% (v/v) of the enzyme Optimase CX255 at 70 °C and pH 5.5 during 2.5 h, the fermentable sugars extracted increased 3.5 times. In this way, the production of 77.5 L of ethanol for each ton of discarded carrots was achieved. This process yielded bagasse as byproduct, which could be used for animal feed. © 2012 Elsevier Ltd.

Aimaretti N.R.,National University of Santa | Aimaretti N.R.,University of Latinamerican Education Centre | Clementz A.L.,National University of Santa | Clementz A.L.,University of Latinamerican Education Centre | And 3 more authors.
International Journal of Energy and Environmental Engineering | Year: 2013

An integrated and sustainable fermentation process was developed which enabled both the revalorization of two regional agro-industrial discards as well as by-product reuse. Carrot and brewer's yeast, which are commonly used for animal feed, were processed to obtain 77.5 L of ethanol, 450 kg of solid waste called bagasse, 970 L of liquid effluent called vinasse, and 39.8 kg CO2 per each ton of discarded carrot. Results showed that the obtained bagasse was suitable for feeding 55 animals (calfs). The dilution of vinasse with fresh water (1:5) satisfied the requirements necessary to be used as beverage for the same number of animals, leaving a remnant which could be newly diluted (1:5) and used to irrigate a 0.025-ha carrot crop, the land dimension required to grow 1 ton of carrot. © 2013 Aimaretti et al.

Hernandez Guiance S.N.,Pontifical Catholic University of Argentina | Coria I.D.,University of Latinamerican Education Centre | Irurzun I.M.,National University of La Plata | Mola E.E.,National University of La Plata
Chemical Physics Letters | Year: 2016

In the present work we experimentally determine the activation energies of CH4,SO2 and O2 reactions on Cr2O3/γ-Al2O3. To our knowledge there is no previous determination of these parameters, so fundamental information is provided to determine the velocity laws of these reactions and understand their kinetic behavior. © 2016

Sanchez V.,Pontifical Catholic University of Argentina | Baeza R.,Pontifical Catholic University of Argentina | Ciappini C.,University of Latinamerican Education Centre | Zamora M.C.,Pontifical Catholic University of Argentina | And 2 more authors.
Food Control | Year: 2010

The aim of this work was to compare refractometric index (RI) and Karl Fischer (KF) titration methods for water content measurement in honeys. In addition, the effectiveness of two different solvents (methanol (M) and methanol:formamide in the ratio 1:1 (M + F)) was evaluated. Results indicated that RI and KF methods yielded similar results for water content determination in honeys; mainly, when the solvent M + F was used. This solvent mixture (M + F) also allowed a reduction in titration time which may be a potential advantage for measuring water content in honey. © 2009 Elsevier Ltd. All rights reserved.

Cespedes M.,University of Latinamerican Education Centre | Cardenas P.,University of Latinamerican Education Centre | Staffolani M.,University of Latinamerican Education Centre | Ciappini M.C.,University of Latinamerican Education Centre | Vinderola G.,CONICET
Journal of Food Science | Year: 2013

The increase in vegetarianism as dietary habit and the increased allergy episodes against dairy proteins fuel the demand for probiotics in nondairy products. Lactose intolerance and the cholesterol content of dairy products can also be considered two additional reasons why some consumers are looking for probiotics in other foods. We aimed at determining cell viability in nondairy drinks and resistance to simulated gastric digestion of commercial probiotic lactobacilli commonly used in dairy products. Lactobacillus casei LC-01 and L. casei BGP 93 were added to different commercial nondairy drinks and viability and resistance to simulated gastric digestion (pH 2.5, 90 min, 37 °C) were monitored along storage (5 and 20 °C). For both strains, at least one nondairy drink was found to offer cell counts around 7 log orders until the end of the storage period. Changes in resistance to simulated gastric digestion were observed as well. Commercial probiotic cultures of L. casei can be added to commercial fruit juices after a carefull selection of the product that warrants cell viability. The resistance to simulated gastric digestion is an easy-to-apply in vitro tool that may contribute to product characterization and may help in the choice of the food matrix when no changes in cell viability are observed along storage. Sensorial evaluation is mandatory before marketing since the product type and storage conditions might influence the sensorial properties of the product due to the possibility of growth and lactic acid production by probiotic bacteria. Practical Application: Many probiotic cultures are available for application in dairy products. However, care must be taken before applying them to different foods and the necessary control of viable cells must be carried out in order to diversify the market of probiotic products with the present available commercial strains. © 2013 Institute of Food Technologists®.

Molinas J.L.,University of Latinamerican Education Centre | Torrent M.C.,University of Latinamerican Education Centre | Zapata M.E.,University of Latinamerican Education Centre
Revista Espanola de Nutricion Comunitaria | Year: 2010

Background: Sea fish (SF) is a natural source of omega-3 fatty acids (O3FA). Intake of O3FA reduces the production of arachidonic acid derivatives, which have antiinflammatory activity, and elevates levels of eicosapentaenoic acid derivatives, with lower activity. O3FA also inhibit T helper-2 lymphocytes, which mediate allergic inflammatory reactions. SF is a major food allergen and could also act as a histamine-releasing food. The objective of this study was to analyze the association between SF consumption and the presence of allergic symptoms. Methods: We conducted a cross-sectional study in 765 randomly selected students (83.4% women), aged 17-65 years old, attending the Universidad del Centro Educativo Latinoamericano. The students completed validated questionnaires on allergic diseases and the frequency of SF intake. Results: The prevalence of asthma symptoms in the previous 12 months was 8.0% among participants reporting SF consumption daily, weekly or once a month or more (46.7%) and was 12.9% in those reporting SF consumption less than once a month or never (p<0.05). Similar results were obtained when we evaluated exercise-induced asthma (7.9% vs 12.2%; p<0.05), nocturnal dry cough not associated with infections (13.3% vs 19.6%; p<0.05), allergic rhinoconjunctivitis in the last year (20.8% vs 27.5%; p<0.05) and symptoms of both allergic respiratory diseases (4.2% vs 8.7%; p<0.005). Statistical significance was maintained when stratification by sex, age, obesity, reflux and smoking habits was performed. In contrast, a higher frequency of urticaria symptoms was found in participants who reported SF consumption more than twice a week (29.5% vs 12.5%; p<0.05). Conclusions: These data suggest that SF consumption at least once a month could protect against diseases such as asthma and allergic rhinoconjunctivitis, due to the O3FA content of SF. However, high SF intake could increase the prevalence of urticaria, probably because of allergic or pseudoallergic phenomena. © 2010 SENC.

Zapata M.E.,University of Latinamerican Education Centre | Hoet A.M.,University of Latinamerican Education Centre | Simonini D.,University of Latinamerican Education Centre
Revista Espanola de Nutricion Humana y Dietetica | Year: 2013

Introduction: a diet high in fiber has associated with better glycaemic control in diabetes 2 patients, being the soluble fraction of the most effective in the control of blood sugar levels. The aim of the study is determine the amount of total, soluble and insoluble dietary fiber intake by patients with type 2 diabetes who attended a medical centre for diabetics in Rosario. Material and methods: descriptive, observational, cross-sectional study was conducted. It was determined a sample of 60 adults with a diagnosis of diabetes type 2 >6 months, 18 to 70 years old, with no disease or intestinal disorders. A semiquantitative food frequency questionnaire of foods source of dietary fiber, and a photo album was used to identify the portion size. Descriptive statistical analysis was performed and Chi-square and ANOVA test was used to evaluate the association. Results: the average consumption of total fiber was 18,8±5,9 g/d, 14, 8±4,6 g/d corresponded to insoluble fiber and 4,0±1,5 g/d to soluble fiber. Fruits and vegetables contributed 82% of soluble fiber. Most patients (62%) had a consumption of fiber total less than the recommendation of the ADA, and 60% presented an inadequate relationship between intake of soluble and insoluble fiber. Conclusions: it is necessary to increase the contribution of total dietary fiber, especially the soluble fraction in diabetes 2 patients, because there are evidences that supports its benefits.

Clementz A.L.,CONICET | Aimaretti N.R.,CONICET | Aimaretti N.R.,University of Latinamerican Education Centre | Manuale D.,CONICET | And 2 more authors.
International Journal of Energy and Environmental Engineering | Year: 2015

Discarded carrots are a valuable source of biomass amenable for valorization. Their use as raw material for ethanol production by fermentation, using yeasts immobilized in Calcium alginate, was proposed. The biocatalyst immobilization method, the existence of internal and external mass transfer limitations, the effect of the initial pH and the reuse of immobilized yeasts were particularly evaluated. Results indicate that beads made with a 2 % solution of Sodium alginate and a 30 % solution of Saccharomyces cerevisiae were strong enough to allow an efficient nutrient transfer into the matrix and to prevent cell leaking. A stirring rate of 200 rpm was needed to avoid external mass transfer limitations. These beads were used in three successive fermentations. An initial pH of 5.5 reached the best fermentation parameters. Non-enriched, non-sterile carrot must was fermented through immobilized yeasts; and values of ethanol concentration (29.9 g L−1), Yp/s (0.409 g g−1), and productivity (7.45 g L−1 h−1) were obtained. These values were similar to those registered when free cells were used. © 2014, The Author(s).

Vinderola G.,CONICET | Cespedes M.,University of Latinamerican Education Centre | Mateolli D.,University of Latinamerican Education Centre | Cardenas P.,University of Latinamerican Education Centre | And 3 more authors.
International Journal of Dairy Technology | Year: 2011

This study investigated the gastric acid resistance ofLactobacillus caseiin commercial fermented milks during refrigerated storage. Samples of fermented milks (natural, strawberry, fruits of the forest, vanilla and multifruits) were obtained from three different manufacturers. In vitro gastric acid resistance (GAR) was assessed in samples upon arrival to the laboratory and after 10 and 20days of refrigerated storage at 5°C and 12°C. The GAR ofL.caseiin fermented milks may increase or decrease during storage in relation to the flavour and storage conditions. The occurrence of this phenomenon in commercial fermented milks containing probiotic bacteria may induce changes in their functionality after consumption. © 2011 Society of Dairy Technology.

PubMed | University of Latinamerican Education Centre
Type: Journal Article | Journal: Nutricion hospitalaria | Year: 2016

The aim of this work was to assess the prevalence of overweight, obesity, abdominal-obesity and short stature among Rosario (Argentina) adult population.A cross-sectional nutritional survey was carried out in Rosario (2012-2013). A random sample (n = 1194) of adult population (18-70 years old) was interviewed. Anthropometric measurements and a general questionnaire incorporating questions related to socio-demographic and lifestyle characteristics, education level and physical activity were used.The current study detected a high prevalence of overweight and obesity among adult population in Rosario. The prevalence of overweight was 32.7% (43.9% in men and 27.6% in women, p < 0.001), of obesity was 23.5% (21.6% in men and 24.3% in women), and of abdominal obesity was 57.5% (63.5% in men vs.54.8% in women, p < 0.005). Multivariate analysis showed that the prevalence of overweight/obesity and abdominal obesity increased according the age and abdominal obesity decreased with high physical activity in men. In women prevalence of overweight/obesity, and abdominal obesity increased with age, marital status (married or coupled), presence of at least one child at home and low educational level.The prevalence of short stature was higher in women (16.4% vs. 8.4%, p < 0.001) and was related with age, overweight and abdominal obesity.

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