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https://purl.org/pe-repo/ocde/ford#2.11.04
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Fermentación
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fermentation
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Evaluación
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Cacao
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fermentación
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fermentation process » termination process (Expander búsqueda), implementation process (Expander búsqueda), creation process (Expander búsqueda)
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1
tesis de maestría
The thesis has two purposes: The first one is to build a mathematical model that better approximates (with respect to the mathematical model in [2]) to the behaviour of the wine fermentation process with the addition of certain amount of nitrogen at some instant of time, based in [2]. This mathematical model is described by mean ordinary differential equations including some parameters which will be identified solving some optimization problems. The second purpose of the thesis is to study the improved model but introducing some control variables in order to stabilize in an appropriated sense the corresponding dynamical system of the new model. This is a kind of MIMO nonlinear system control problems and will be solved using the tools in [6].La tesis tiene dos objetivos: El primero es construir un modelo matemático que aproxime mejor (con respecto al modelo matemático en “Modeling th...
2
tesis de maestría
The thesis has two purposes: The first one is to build a mathematical model that better approximates (with respect to the mathematical model in [2]) to the behaviour of the wine fermentation process with the addition of certain amount of nitrogen at some instant of time, based in [2]. This mathematical model is described by mean ordinary differential equations including some parameters which will be identified solving some optimization problems. The second purpose of the thesis is to study the improved model but introducing some control variables in order to stabilize in an appropriated sense the corresponding dynamical system of the new model. This is a kind of MIMO nonlinear system control problems and will be solved using the tools in [6].
3
artículo
Publicado 2019
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Cocoa beans fermentation is a spontaneous process of post-harvest very important for the development of chocolate aroma and flavor, which involves a number of complex microbial activities. In this work, we identify the microorganisms present in cocoa beans before, during and after the fermentation process, applying DNA sequencing analysis and MALDI TOF / TOF mass spectrometry. With the first method, the predominant bacteria and yeast identified were Lactobacillus plantarum (29%), L. brevis (18%), Bacillus cereus (15%), Pediococcus acidilactici (12%), and Pichia kudriavzevii (100%). The most important peptide sequences of each identified strain by mass fingerprint were characterized too. By the second method, 51 species of microorganisms being 73.7% bacterial species and 26.3% yeast species were identified. Additionally peptide sequences responsible Vicilin protein characteristic aroma of...
4
artículo
Publicado 2019
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Cocoa beans fermentation is a spontaneous process of post-harvest very important for the development of chocolate aroma and flavor, which involves a number of complex microbial activities. In this work, we identify the microorganisms present in cocoa beans before, during and after the fermentation process, applying DNA sequencing analysis and MALDI TOF / TOF mass spectrometry. With the first method, the predominant bacteria and yeast identified were Lactobacillus plantarum (29%), L. brevis (18%), Bacillus cereus (15%), Pediococcus acidilactici (12%), and Pichia kudriavzevii (100%). The most important peptide sequences of each identified strain by mass fingerprint were characterized too. By the second method, 51 species of microorganisms being 73.7% bacterial species and 26.3% yeast species were identified. Additionally peptide sequences responsible Vicilin protein characteristic aroma of...
5
artículo
Publicado 2019
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The chemical composition and apparent digestibility of nutrients of the solid-state fermentation (SSF) of waste taro tubers (Colocasia esculenta (L) Schott) inoculated with natural yogurt fed to growing pigs was determined. Dry matter (DM), organic matter (OM), crude protein (CP), crude fibre (CF), ash, ether extract (EE), nitrogen-free extracts (NFE) and gross energy (GE) were determined. For the study of apparent digestibility of the MS, MO, CP, CF, NFE and GE, 12 castrated Landrace x Duroc x Pietrain male pigs of 25 ± 2 kg were used, distributed in three groups with four animals each and fed with diets containing 0, 10, and 20% of SSF (T0, T10 and T20, respectively). The SSF presented high content of DM (83.33%), OM (93.77%), CP (13.95%), NFE (72.78%) and GE (4162.13 kcal kg MS-1) and low levels of EE (1.50%), CF (5.54%) and ashes (6.23%). The highest digestibility coefficients of th...
6
artículo
Publicado 2019
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The chemical composition and apparent digestibility of nutrients of the solid-state fermentation (SSF) of waste taro tubers (Colocasia esculenta (L) Schott) inoculated with natural yogurt fed to growing pigs was determined. Dry matter (DM), organic matter (OM), crude protein (CP), crude fibre (CF), ash, ether extract (EE), nitrogen-free extracts (NFE) and gross energy (GE) were determined. For the study of apparent digestibility of the MS, MO, CP, CF, NFE and GE, 12 castrated Landrace x Duroc x Pietrain male pigs of 25 ± 2 kg were used, distributed in three groups with four animals each and fed with diets containing 0, 10, and 20% of SSF (T0, T10 and T20, respectively). The SSF presented high content of DM (83.33%), OM (93.77%), CP (13.95%), NFE (72.78%) and GE (4162.13 kcal kg MS-1) and low levels of EE (1.50%), CF (5.54%) and ashes (6.23%). The highest digestibility coefficients of th...
7
artículo
Publicado 2024
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The objective of this study was to assess the effects of saponins derived from Chenopodium quinoa by-products on methane (CH4) production in a ruminal fermentation system under in vitro conditions. Additionally, the study included the analysis of short-chain fatty acids (SCFAs) and true dry matter digestibility (TDMD). The saponin extracts obtained from three quinoa varieties were Altiplano (AS), Quillahuaman (QS), and Salcedo (SS), and were tested at six different doses (0, 0.2, 0.4, 0.6, 0.8, and 1.0mg/mL) each. Rumen fluid was obtained from two fistulated Junín breed sheep, with alfalfa hay (AH) and a 1:1 mixture of maize and bran (MB) was used as basal substrates. The data were processed in a completely randomized design and replicated three times. The CH4 per dry matter (mL/g DM), after 24h of incubation significantly decreased, acetate molar concentration decreased (p<0.05) with A...
8
artículo
Publicado 2018
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We wish to thank Centro de Referencia para Lactobacilos (CERELA-CONICET) collection for supplying the strains. We would also like to thank IBRAC and Sealed Air-Brazil that provided the additives and packaging, respectively. M. Almeida received the support of the Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES), PhD scholarship from Brazil and E. Saldaña received the support of the “Consejo Nacional de Ciencia, Tecnología e Innovación Tecnológica - CONCYTEC” from Perú (CIENCIACTIVA programme, PhD scholarship contract agreement No. 104-2016-FONDECYT). This study was financially supported by the São Paulo Research Foundation (FAPESP) Project No.2012/07113-2; project AGL2012-32146 from MINECO (Spain) and PIP2011-0100406 and PIP2015-0530 from CONICET.
9
tesis de grado
Publicado 2024
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This research presents a comprehensive approach to the design, control, and structure of an innovative fermentation machine for the production of Tocosh from potato fermentation. In order to achieve this objective, a thorough analysis of the various crucial parameters involved in the fermentation process has been carried out. The main objective of the design proposal is the real-time monitoring of essential factors such as pH and temperature in the process. To achieve this, a control system has been designed that will allow precise and constant monitoring of the temperature and pH parameters, and monitoring of the water level was also carried out to improve the quality of the product. Furthermore, the structural analysis of the fermentation chamber is addressed in detail, using Inventor software for the creation of three- dimensional models of each component and for the generation of the...
10
artículo
Publicado 2024
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In local cup chocolate production, the influence of cocoa varieties and fermentation conditions on its sensory characteristics are overlooked. The objective of the study was to sensorially evaluate chocolate made from two varieties and three clones of cocoa (Theobroma cacao L.) fermented for 5, 6, 7 and 8 days. Brix degrees and pH were recorded. Sensory evaluation was carried out with a panel of 10 judges. The research was experimental. Friedman's test and its multiple comparisons test were used. The maximum fermentation temperature reached was 51°C, decreasing to 38°C towards the end of the process. Both pH and initial brix degrees decreased from 4.6 to 4.15 and from 11 to 9.6, respectively. Differences were observed in the cocoa flavor and acidity attributes of Criollo cup chocolate at different fermentation periods. The 5-day fermentation was the one with the highest total score, f...
11
tesis de grado
Publicado 2024
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Abstract—This study focused on the development of a coffee fermenting machine designed to enhance the organoleptic characteristics of the Catimor variety in the province of Chanchamayo, with the aim of increasing the value of Peruvian coffee in the international market. The implementation of this machine not only benefits local coffee farmers by improving their income, but also contributes to the consolidation of Peruvian coffee as one of the best in the world. The methodology adopted for the design process follows the guidelines of the German VDI 2221 standard, which allowed for an effective understanding of the steps required to complete the proposed design. Furthermore, the designed machine manages to reduce the fermentation time from approximately 24 to 12 hours, while improving the sensory properties of the coffee when tasted. The design approach was based on a thorough analysis o...
12
artículo
Publicado 2021
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The use of citrus by-products was evaluated through the fermentation of the orange peel by means of Aspergillus niger van Tieghem strain, 1867, which was obtained by inoculation in a petri dish, at a temperature of 35°C and a pH of 4,3. The crushed orange peel was used as a substrate, partially dehydrated, spread on trays, dried in cardboard trays and without heat pretreatment, adding only components and mineral nutrients, and A. niger was cultivated at different fermentation temperatures between 8°C and 40 °C. Upon completion of the fermentation process of the pretreated orange peel, maximum percentages of transformation of mineral nitrogen to organic nitrogen of 34.5% were obtained, for a value of the thermal integral between 0°C and 320°C per day, obtaining for a kg of dry matter, 6.6% protein for 600 g of product (feed) with 18% protein. Finally, the variation of the pH of the s...
13
artículo
Publicado 2020
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The aim of this study was to determine the viability and nutritional characteristics of shrimp head silage and fish waste destined for pig feeding. In the conservation process, molasses and rice powder were used as a substrate and Lactobacullus fermentus, obtained from the digestive tract of the piglet, as a fermenter. Temperature, pH and percentage of acidity data were recorded, as well as organoleptic and nutritional characteristics in the first 30 days of conservation. The treatments were T1 = Shrimp head with molasses and yogurt; T2 = Shrimp head with rice powder and yogurt; T3 = Fish residue with molasses and yogurt; and T4 = Fish residue with rice powder and yogurt. T1 and T3 presented acidity and low pH, as well as low temperature during the first week, stabilizing the process on day 15. The fermentation of T2 and T4 was inadequate (not feasible). Aerobic mesophilic microorganisms...
14
artículo
Publicado 2020
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The aim of this study was to determine the viability and nutritional characteristics of shrimp head silage and fish waste destined for pig feeding. In the conservation process, molasses and rice powder were used as a substrate and Lactobacullus fermentus, obtained from the digestive tract of the piglet, as a fermenter. Temperature, pH and percentage of acidity data were recorded, as well as organoleptic and nutritional characteristics in the first 30 days of conservation. The treatments were T1 = Shrimp head with molasses and yogurt; T2 = Shrimp head with rice powder and yogurt; T3 = Fish residue with molasses and yogurt; and T4 = Fish residue with rice powder and yogurt. T1 and T3 presented acidity and low pH, as well as low temperature during the first week, stabilizing the process on day 15. The fermentation of T2 and T4 was inadequate (not feasible). Aerobic mesophilic microorganisms...
15
tesis de grado
Publicado 2025
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En Perú, uno de los mayores problemas es la gestión del agua: más del 50% de la población costera depende solo del 2% del abastecimiento disponible. Esta escasez provoca la pérdida de miles de hectáreas agrícolas por falta de riego. Paralelamente, el 45% del lactosuero total producido, subproducto de la industria quesera, se desecha, ocasionando contaminación de suelos y ríos. Como alternativa, se propone aplicar hidrogeles biodegradables en suelos agrícolas para disminuir el estrés hídrico durante periodos de sequía. La tesis plantea el diseño de un proceso para producir hidrogeles de almidón reticulados con ácido cítrico obtenido por fermentación sumergida por lotes de lactosuero con Aspergillus niger. El ácido cítrico se recupera mediante precipitación química con hidróxido de calcio y ácido sulfúrico, seguido de la síntesis del hidrogel de almidón. Se defin...
16
artículo
Publicado 2012
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Dragon fruit juice from three variety (red, pink, and white) were evaluated in pH, total soluble solids, titratable acidity, color, phenolic compounds, antioxidant capacity, while in fermented dragon fruit juice with Saccharomyces cerevisiae were also evaluated the mesophylls and yeasts plus molds, and alcohol grade. The contents of total soluble solids and pH decreased in the fermented juice of all varieties as consequence of the fermentation process. The phenolic compounds were higher in the red dragon fruit juice, followed by the pink and white dragon fruit with average values of 45.3, 32.1 y 24.6 mg of Gallic acid/100 mL of juice, respectively. Therefore, the antioxidant activity was higher in the red dragon fruit juice (160.84 mg of Trolox/100 mL of juice). Fermenting the juice increased the phenolic compounds (changing of 45.31 to 51.38 mg of galic acid/100 mL of juice, in red drag...
17
artículo
Publicado 2012
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Dragon fruit juice from three variety (red, pink, and white) were evaluated in pH, total soluble solids, titratable acidity, color, phenolic compounds, antioxidant capacity, while in fermented dragon fruit juice with Saccharomyces cerevisiae were also evaluated the mesophylls and yeasts plus molds, and alcohol grade. The contents of total soluble solids and pH decreased in the fermented juice of all varieties as consequence of the fermentation process. The phenolic compounds were higher in the red dragon fruit juice, followed by the pink and white dragon fruit with average values of 45.3, 32.1 y 24.6 mg of Gallic acid/100 mL of juice, respectively. Therefore, the antioxidant activity was higher in the red dragon fruit juice (160.84 mg of Trolox/100 mL of juice). Fermenting the juice increased the phenolic compounds (changing of 45.31 to 51.38 mg of galic acid/100 mL of juice, in red drag...
18
artículo
Publicado 2018
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This research was supported by the Programa Nacional de Innovación para la Competitividad y Productividad (Innovate Perú), under the contract N° 223-FINCyT-IA-2013 and Fondo Nacional de Desarrollo Científico, Tecnológico y de Innovación Tecnológica (FON-DECYT), research project PROCYT N° 316-2011-CONCYTEC-OAJ from Peru.
19
artículo
Publicado 2016
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This research aims to determine the time of anaerobic fermentation by reducing sugar intake, inoculating the wort with 4 g/L of Saccharomyces Cerevisiae yeast strains (Lalvin D 47), keeping the fermentation to the following conditions: Acidity 6.5 g/L, temperature 16 °C and Ammonium phosphate 0,2 g/L (nutrient). It was used as raw material grape Italy, from the Province of Cañete. The initial conditions must have been: Brix, 22; acid, 5.7 g / L. The fermentation process was performed in a glass container of 10 L, to which a gas trap adapted to output the CO2 formed during fermentation. To maintain the fermentation temperature, cooling equipment was used. The fermentation time to the above conditions has been 21 days, yielding a wine with residual sugar 1%, aromatic and of good quality.
20
artículo
Publicado 2016
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This research aims to determine the time of anaerobic fermentation by reducing sugar intake, inoculating the wort with 4 g/L of Saccharomyces Cerevisiae yeast strains (Lalvin D 47), keeping the fermentation to the following conditions: Acidity 6.5 g/L, temperature 16 °C and Ammonium phosphate 0,2 g/L (nutrient). It was used as raw material grape Italy, from the Province of Cañete. The initial conditions must have been: Brix, 22; acid, 5.7 g / L. The fermentation process was performed in a glass container of 10 L, to which a gas trap adapted to output the CO2 formed during fermentation. To maintain the fermentation temperature, cooling equipment was used. The fermentation time to the above conditions has been 21 days, yielding a wine with residual sugar 1%, aromatic and of good quality.
