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1
artículo
Publicado 2019
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Acetylation is a chemical modification of the starch structure that consists of replacing a certain number of hydroxyl groups with acetyl groups using acetic anhydride. This process depends on certain factors, such as starch source, acetic anhydride concentration, reaction time and pH. The aim of this study was to characterize the native starch (isolated from a commercial potato ‘Única’ variety) and the acetylated starches by FT-IR spectroscopy, and evaluate their physicochemical (amylose content, color) and functional properties (swelling power, solubility, water retention capacity, thermal properties, and pasting profile). The evaluated samples were native starch (AN) and modified starches by acetylation with different concentrations of 5 %, 10 % and 15 % acetic anhydride (AAc5%, AAc10% and AAc15%). The apparent amylose contents for native starch and acetylated starch (AAc15%) wer...
2
artículo
Rheological and physicochemical analyses were conducted on nine varieties of peach pulps from Mendoza (Argentina) at a range of soluble solids concentration (12.5 to 28°Brix) and temperatures (30 to 50°C).The rheology of the pulps followed the power law model for all conditions, behaving as pseudoplastic fluids. Rheological: consistency coefficient and flow behavior index, using a rotational type viscometer and physicochemical parameters (methods proposed by AOAC): soluble solids, pH, water content, insoluble solids, acidity and pectin content (refractometric method) were determined in this study. Cluster analysis established two groups (1: Halford, Andross, Astengo, Bowen, Sim’s Cling; 2: Fortuna, Loadel and Palora; Sullivan Cling variety could not be assigned to any group) with significant differences.
3
artículo
Rheological and physicochemical analyses were conducted on nine varieties of peach pulps from Mendoza (Argentina) at a range of soluble solids concentration (12.5 to 28°Brix) and temperatures (30 to 50°C).The rheology of the pulps followed the power law model for all conditions, behaving as pseudoplastic fluids. Rheological: consistency coefficient and flow behavior index, using a rotational type viscometer and physicochemical parameters (methods proposed by AOAC): soluble solids, pH, water content, insoluble solids, acidity and pectin content (refractometric method) were determined in this study. Cluster analysis established two groups (1: Halford, Andross, Astengo, Bowen, Sim’s Cling; 2: Fortuna, Loadel and Palora; Sullivan Cling variety could not be assigned to any group) with significant differences.
4
documento de trabajo
Publicado 2008
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Pocas ideas y actividades han recibido elogios tan hiperbólicos como las presentadas en el mundo por Hernando de Soto sobre la informalidad. Premios Nobel en economía, presidentes de varios países, revistas muy importantes y organizaciones multilaterales han respaldado el impulso del registro de propiedad de los pobres, particularmente sus viviendas, como la clave para lanzar una revolución económica mundial desde abajo. En este trabajo presentamos el respaldo institucional de esas ideas, la sustancia analítica de los principales argumentos, la precisión descriptiva de las instituciones operando en el tercer Mundo y los resultados de la aplicación de los programas de titulación promovidos. De esta manera, evaluamos la relación entre la difusión y el poder de una idea con su contenido formal y su efectividad para cambiar el mundo de los pobres.
5
artículo
Publicado 2024
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Unlike inert matter in equilibrium, active matter such as biological organisms are out of equilibrium generating motion and assemblies from molecular interactions and chemical reactions in the nano and micro-scale. In the past, such properties were considered to be exclusive of living systems, however, developments in colloidal science have enabled to produce synthetic analogues known as active colloids capable of emulating these properties. In this article, we first introduce active colloids and Janus particles, the most well studied examples of this scientific field. Then, we briefly present the common methods to synthesize these particles and the description of the mechanism of propulsion at the single colloid level. Besides, we describe how these particles generate collective behavior and assemblies in conditions out of equilibrium. Finally, we describe important characteristics of t...
6
artículo
Publicado 2022
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Objective: To evaluate the psychometric properties of the Mexican version of the Parental-Caregivers Perceptions Questionnaire. Materials and methods: A psychometric scale validation study developed in Poza Rica (Veracruz-México) that cross-culturally adapted the Parental-Caregivers Perceptions Questionnaire from Peruvian Spanish to Mexican slang. Face validity was evaluated through the judgment of experts who rated the clarity, relevance and importance of the questions. The sample was 241 parents and caregivers. Reliability was assessed using Cronbach's alpha and McDonald's Omega, internal consistency, and discriminant power using Spearman's correlation coefficient, and content validity was assessed using Exploratory Factor Analysis. Results: The scale showed an α=0.81 and ω=0.8. The matrix tests presented a Kaiser-Meyer-Olkin index=0.739 (p=0.001); Bartlett's test (p=0.001). Various...
7
artículo
Publicado 2022
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Objective: To evaluate the psychometric properties of the Mexican version of the Parental-Caregivers Perceptions Questionnaire. Materials and methods: A psychometric scale validation study developed in Poza Rica (Veracruz-México) that cross-culturally adapted the Parental-Caregivers Perceptions Questionnaire from Peruvian Spanish to Mexican slang. Face validity was evaluated through the judgment of experts who rated the clarity, relevance and importance of the questions. The sample was 241 parents and caregivers. Reliability was assessed using Cronbach's alpha and McDonald's Omega, internal consistency, and discriminant power using Spearman's correlation coefficient, and content validity was assessed using Exploratory Factor Analysis. Results: The scale showed an α=0.81 and ω=0.8. The matrix tests presented a Kaiser-Meyer-Olkin index=0.739 (p=0.001); Bartlett's test (p=0.001). Various...
8
artículo
Publicado 2023
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This research aimed to analyze the psychometric evidences of the Brief silence Scale (BRS) in Peruvian university students. A total of 468 students from public and private universities participated, from which 62,6% were women and 37.4% were men aged 18-50 years old (M=23.97, SD=6.58). The confirmatory factor analysis confirmed the adjustment of the oblique model (CFI=.993; TLI=.987; RMSEA=.004; SRMR=.023) and adequate reliability values were obtained (α = .79 y ω = .85). Also, the criterion validity related to the same variable with the Brief Resilient Coping Scale (BRCS) was identified (r=.606); the Life Orientation Test (LOT – R) was used for convergent and divergent validity (r=.617) and the Depression Anxiety Stress Scale-21 (DASS-21), with correlation coefficients of r=-.546 for depression, r=-.515 for anxiety, and r=-.514 for stress. Finally, the invariance was analyzed by gen...
9
artículo
Publicado 2023
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The purpose of this instrumental design study was to analyze the psychometric evidence of the Multidimensional Scale of Perceived Social Support (MSPSS) for its application in university students in Metropolitan Lima. A total of 520 students participated, 292 women (56%) and 228 men (44%), between 18 and 61 years of age (M = 24.89, SD = 5.17). The confirmatory factor analysis showed acceptable values for the bifactor model: χ2/gl = 4.645, CFI = .99, TLI = .98, SRMR = .027, RMSEA = .084 (90% C.I., .072, .096) and WRMR = .99. Additionally, a value of H = .945, PUC = .727, ECV = .695 and the ωH = .85 were obtained for the general factor. Convergent validity was examined with the General Self-Efficacy Scale (GSES) (r = .50; r2 = .25) and divergent validity with the Test Anxiety Inventory-State (TAI-State) (r = -.32; r2 = .10). In addition, reliability was determined through the ordinal ome...
10
artículo
Publicado 2023
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In this article, the author studies the delay or slowness of the procedures for the granting of urban and building licenses, which is mainly due to the lack of knowledge of the applicable regulations and/or the arbitrary or deficient exercise of municipal officials, which in turn results in the demand for greater requirements than those contemplated in the national regulatory framework, the creation of new administrative procedures, among others.The delay of such procedures not only affects real estate projects, but also has an impact on the complementary activities and services necessary for their execution, such as the design, preparation and execution of the projects, the supervision of the works, the hiring and beginning of work by contractors, suppliers of inputs and services, administrators and workers, purchasers of real estate units, among other serv...
11
artículo
Publicado 2021
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The Peruvian government’s Law N. 27811, an intellectual property law passed in 2002 and designed to register and protect tradItional knowledge, provides productive opportunities for critical analysis. Framed within the trajectory of international intellectual property rights and discussions that complicate the integration of Traditional Ecological Knowledge (TEK) into Cartesian scientific frameworks, this paper critically examines how the Peruvian law has been implemented and its impacts in Indigenous communities, particularly in the Andean Amazon region. The analysis is based on the author’s work assisting Indigenous communities in San Martin register their knowledge through this law. While the law represents an advanced legal attempt to address power inequalities, it remains problematic. It does not address the impoverishment of Indigenous Peoples and continues to subordinate ...
12
artículo
Publicado 2016
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Camu camu is the fruit that has the highest content of vitamin C, which is 100 times higher than the lemon. This tropical fruit is native to the Amazon region and it is mainly distributed in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. In its composition, it has different bioactive compounds such as carotenoids, antioxidants, vitamins and phenolic compounds such as anthocyanins and tannins that give it the characteristics of a functional food. It also has beneficial properties on the health of those who consume it, because it is considered a powerful antioxidant, anti-inflammatory and antimicrobial; it is also a great ally against cardiovascular diseases and for people suffering from obesity. Research shows a positive effect for the treatment of early stages of diabetes, as well as providing other benefits. This review work aimed to study the literature regarding camu-camu as ...
13
artículo
Publicado 2016
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Camu camu is the fruit that has the highest content of vitamin C, which is 100 times higher than the lemon. This tropical fruit is native to the Amazon region and it is mainly distributed in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. In its composition, it has different bioactive compounds such as carotenoids, antioxidants, vitamins and phenolic compounds such as anthocyanins and tannins that give it the characteristics of a functional food. It also has beneficial properties on the health of those who consume it, because it is considered a powerful antioxidant, anti-inflammatory and antimicrobial; it is also a great ally against cardiovascular diseases and for people suffering from obesity. Research shows a positive effect for the treatment of early stages of diabetes, as well as providing other benefits. This review work aimed to study the literature regarding camu-camu as ...
14
artículo
Publicado 2024
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The germination of quinua improves the content of polyphenols, flavonoids, amino acids, dietary fiber, vitamin E, antioxidants and other bioactive compounds, making this pseudocereal a nutritious and healthy source for the preparation of functional foods. The aim of this work was to assess the effect of the germination of quinua on the nutritional, biological and functional properties, in turn to be able to analyze the potential that this golden grain has in the food industry. For the systematic review, the databases (Scopus, Scielo and Science Direct) were used, following the PRISMA guideline and the PIO strategy (Population, Intervention, Outputs), which helped to formulate the search equations and to identify the most relevant articles of the last 5 years. The results of the bibliometric analysis showed that the germination of quinua improves the nutritional properties and the content...
15
artículo
Publicado 2024
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The germination of quinua improves the content of polyphenols, flavonoids, amino acids, dietary fiber, vitamin E, antioxidants and other bioactive compounds, making this pseudocereal a nutritious and healthy source for the preparation of functional foods. The aim of this work was to assess the effect of the germination of quinua on the nutritional, biological and functional properties, in turn to be able to analyze the potential that this golden grain has in the food industry. For the systematic review, the databases (Scopus, Scielo and Science Direct) were used, following the PRISMA guideline and the PIO strategy (Population, Intervention, Outputs), which helped to formulate the search equations and to identify the most relevant articles of the last 5 years. The results of the bibliometric analysis showed that the germination of quinua improves the nutritional properties and the content...
16
artículo
Publicado 2021
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The present research aimed to evaluate the effect of pH and NaCl on the absorption power of water, gelling, emulsifying and foaming capacity of residual linseed meal (Linum usitatissimum L.). The residual flour (without mucilage) was obtained by boiling the seeds in distilled water, for their subsequent filtration and drying (40 °C x 48 hours) and conversion into flour (type A flour). Whole flaxseed flour was also obtained (without extracting the mucilage) which was called type B flour. The techno-functional properties were determined at pH 3, 5, 7 and 9 as well as at NaCl concentrations of 0.1, 0.25 and 0.5 M. The highest water absorption capacity in type A and B flour was 2.81 and 2.38 g H2O / g solid respectively at pH 5. The oil absorption in type A and B flour was 1.87 and 1.26 g oil / g solid. The highest emulsion in type A flour (45.8%) was obtained at pH 9, while for type B flou...
17
revisión
Publicado 2021
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This paper was written in the context of the project: Desarrollo de un software para predecir el desempe no structural de product terminado en el proceso de fabricacion por manufactura aditiva de materiales compuestos founded by Cienciactiva, CONCYTEC, under the contract number No 112-2018-FONDECYT-BM-IADT-MU. The authors of this manuscript appreciate the financial support from the Peruvian Government.
18
artículo
Publicado 2013
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Constitutional doctrine has little addressed on the General Comptroller of the Republic and its controlling function of public resources execution and management. Efforts have been made to explain this situation in other realities, regarding high budgetary, accounting and auditing content needed to carry out auditing activities constitutionally assigned to this kind of entities. Nevertheless, identifying competences of the General Comptroller of the Republic and its nature of autonomous constitutional body shapes an important expression of Constitutional State and the principle of powers division. This entity controls State’s Public Budget execution contributing to constitutional property protection, legality of budget implementation and the appropriate management of public resources, also the «efficiency» of social needs, proper functioning of public administration and prevention of...
19
artículo
Publicado 2014
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A partir de la teoría de la función social de los derechos, el autor aborda el trasfondo jurídico de la expropiación como figura que limita el ejercicio de la propiedad en beneficio de otros derechos de carácter social. Para ello, analiza los diferentes tipos garantías a favor de los propietarios de bienes que pueden ser objeto de una medida expropiatoria, así como los principales elementos inherentes a esta figura jurídica de naturaleza constitucional.
20
artículo
Publicado 2015
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We have obtained and characterized chemical, physicochemical and functional starch quinoathree varieties: black Collana (VC), red pasankalla (VP) and white Junín (VB). Proximalchemical analysis and grain quinoa starch were performed by the AOAC method (2000),starch extraction was performed in laboratory scale; the highest yield is 30.62% in the VBfollowed by VP with 26.71 %, while VC won at least 18,95%; there is significant differenceat (p <0.05) between varieties. For functional properties of starch samples have low solubilityof 5% and restricted swelling power of 0.7% so that there are no significant differences (p>0.05) granules are finding that their forces or links very strong union; a high gelatinizationtemperature range (66-69°C) which showed no significant difference (p> 0.05); plus a slightpeak viscosity of 2006cp to VC, 1521VB and minimum VP 1009 cp. Resulting in ex...
