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1 – 10 of 130
Article
Publication date: 18 July 2008

Ramón Benito Infante, Omar E. Garcia, Andrés Carmona and Carlos J. Rivera

Brush border intestinal disaccharidases (maltase, sucrase and lactase) play an important role in carbohydrate assimilation. These enzymes are located on the brush border…

Abstract

Purpose

Brush border intestinal disaccharidases (maltase, sucrase and lactase) play an important role in carbohydrate assimilation. These enzymes are located on the brush border and may interact with legume seed components such as dietary fiber and polyphenols. The purpose of this paper is to assess the effect of legume dietary fiber on rat disaccharidase in vitro.

Design/methodology/approach

Rat intestinal disaccharidases from Sprague‐Dawley rats fed a basal diet for 21 days were partially purified from intestinal scrapings. Enzyme activities were tested in vitro in the absence and presence of total dietary fiber isolated from Phaseolus vulgaris (Varieties Tacarigua and Montalbán) and Vigna unguiculata (Varieties Unare and Tuy) seeds that differ in fiber and polyphenol content. Dietary fiber was purified using the AOAC method.

Findings

The specific activities of the intestinal brush‐border disaccharidases from rats fed the basal diet were 3.29 ± 0.06, 3.13 ± 0.62 and 0.18 ± 0.04 umoles of glucose released/mg of protein/min for maltase, sucrase and lactase, respectively. Total dietary fiber from the legume tested inhibited both sucrase and maltase. Fiber from the four seeds tested affected sucrase similarly (average inhibition 35 per cent) whereas the fiber residue from P. vulgaris Montalbán was more effective on maltase (26.7 per cent) than that from P. vulgaris Tacarigua (12.2 per cent). Effect of V. unguiculata fibers on maltase was similar and somewhat in between those from P. vulgaris.

Originality/value

These results suggest that dietary fiber, as well as other factors from beans with anti‐physiological effect, such as condensed tannins and fitic acid possibly associated with the dietary fiber, may impair carbohydrate availability and may contribute to the low glycemic index proper of these foodstuffs.

Details

Nutrition & Food Science, vol. 38 no. 4
Type: Research Article
ISSN: 0034-6659

Keywords

Article
Publication date: 3 May 2016

Daniela Diaz-Alonso, Mario Moreno-Moreno, Carlos Zuñiga, Joel Molina, Wilfrido Calleja, Juan Carlos Cisneros, Luis Niño de Rivera, Volodymir Ponomaryov, Felix Gil, Angel Guillen and Efrain Rubio

This paper aims to purpose the new design and fabrication scheme of Touch Mode Capacitive Pressure Sensor (TMCPS), which can be used in a wireless integrated resistor…

Abstract

Purpose

This paper aims to purpose the new design and fabrication scheme of Touch Mode Capacitive Pressure Sensor (TMCPS), which can be used in a wireless integrated resistor, inductor and capacitor circuit for monitoring pressure in biomedical applications.

Design/methodology/approach

This study focuses on the design, simulation and fabrication of dynamic capacitors, based on surface micromachining using polysilicon or aluminum films as the top electrode, both structural materials are capped with a 1.5 μm-thick polyimide film.

Findings

The design of microstructures using a composite model fits perfectly the preset mechanical behavior. After the full fabrication, the dynamic capacitors show complete mechanical flexibility and stability.

Originality/value

The novelty of the method presented in this study includes two important aspects: first, the capacitors are designed as a planar cavity within a rigid frame, where two walls contain channels which allow for the etching of the sacrificial material. Second, the electromechanical structures are designed using a composite model that includes a polyimide film capping for a precise pressure sensing, which also protects the internal cavity and, at the same time, provides full biocompatibility.

Details

Microelectronics International, vol. 33 no. 2
Type: Research Article
ISSN: 1356-5362

Keywords

Article
Publication date: 8 September 2014

Kendra Dyanne Rivera and Sarah J. Tracy

“Dirty work” is an embodied, emotional activity, and may best be expressed through narrative thick description. The purpose of this paper is to employ creative analytic…

Abstract

Purpose

“Dirty work” is an embodied, emotional activity, and may best be expressed through narrative thick description. The purpose of this paper is to employ creative analytic techniques through a “messy text” for better understanding the tacit knowledge and emotionality of dirty work and dirty research. The vignettes, based upon ethnographic fieldwork with US Border Patrol agents, viscerally reveal the embodied emotions of dirty work and doing dirty research.

Design/methodology/approach

The research draws on a two and a half year ethnography of the US Border Patrol in which the first author engaged in participant observation, shadowing, and interviews. Based upon the iterative data analysis and narrative writing techniques using verbatim quotations and field data, the essay provides a series of vignettes that explore the multi-faceted feelings of dirty work.

Findings

Tacit knowledge about dirty work is unmasked and known through experiences of the body as well as emotional reactions to the scene. A table listing the emotions that emerged in these stories supplements the narrative text. The analysis shows how communication about emotions provides a sense-making tool that, in turn, elucidates both the challenges and the potential highlights of doing dirty work. In particular, findings suggest that emotional ambiguity the “moral emotions” of guilt and shame may serve as sense-making tools that can help in ethical decision making and a re-framing of challenging situations.

Originality/value

A field immersion alongside dirty workers, coupled with a creative writing approach, provides access to the fleeting, embodied, and fragmented nature of tacit knowledge – answering the questions of what dirty work feels like. The essay provides a behind the scenes exploration of US Border Patrol agents – a profession that is alternately stigmatized or hidden from public view. Finally, the piece provides a self-reflexive account of the messy realities of conducting “dirty research” in a way that is open ended and embodied.

Details

Qualitative Research in Organizations and Management: An International Journal, vol. 9 no. 3
Type: Research Article
ISSN: 1746-5648

Keywords

Article
Publication date: 1 February 1998

Nora Lado, Albert Maydeu‐Olivares and Jaime Rivera

Most researchers have studied economic performance linked to market orientation, while a lesser interest has been shown in validating this construct’s measure. We present…

1904

Abstract

Most researchers have studied economic performance linked to market orientation, while a lesser interest has been shown in validating this construct’s measure. We present a study of market orientation designed to obtain a valid measure of the market orientation construct. After presenting a theoretical model of market orientation, it is applied to investigate the usefulness of this construct in insurance companies of two European countries. Key features of the research methodology include several rounds of pretesting, multiple informant assessment, and a covariance structure procedure to show the structural validity of a measure of market orientation. The results show that the measure proposed is represented by a factorial structure that can be interpreted as an overall market orientation factor in both populations and a country‐specific additional factor.

Details

European Journal of Marketing, vol. 32 no. 1/2
Type: Research Article
ISSN: 0309-0566

Keywords

Book part
Publication date: 23 June 2022

Rosalina Torres-Ortega and Carlos Alberto Santamaria-Velasco

COVID-19 has spread so quickly and uninterruptedly that it has put great pressure on the capacities of emerging countries, especially the Latin America area. Its impacts…

Abstract

COVID-19 has spread so quickly and uninterruptedly that it has put great pressure on the capacities of emerging countries, especially the Latin America area. Its impacts that will have on businesses and entrepreneurs, it can be inferred that the duration of this crisis is still uncertain; thus, the aim on this chapter is to aggregate the current knowledge on how COVID-19 has impacted the entrepreneurship, and their expectations in the short and medium term. We examined 37 articles published between 2020 and 2021. To develop the discussion, we conducted descriptive review including year, affiliation of the first author, type of study, research methods in reviewed papers, and the origin of the empirical sample. We follow our thematic analysis within four broad categories: (1) crisis; (2) digitalization; (3) education; and (4) employment. Our results show that the call to address grand challenges, particularly relate to digitalization, public policies focused on supporting entrepreneurs and education in entrepreneurship in the Latin America context.

Details

The Emerald Handbook of Entrepreneurship in Latin America
Type: Book
ISBN: 978-1-80071-955-2

Keywords

Book part
Publication date: 23 June 2022

Mario Vargas Saenz

This work presents a review of the state of the art of the present century on academic and scientific production in Latin America related to the concept of Social…

Abstract

This work presents a review of the state of the art of the present century on academic and scientific production in Latin America related to the concept of Social Innovation. The analysis is based on articles published in indexed journals, which makes it possible to understand the existing asymmetry between the conceptual and theoretical veins, of the case studies, as well as of good social innovation practices that have been published in recent years. These debates have in some cases transcended public policies, as well as business and social realities where social innovation is a mechanism and strategy for personal, social, and territorial development. Finally, a Latin American community of researchers and academics around social innovation must be consolidated, who choose to continue building theoretical-empirical bodies following the Latin American reality.

Details

The Emerald Handbook of Entrepreneurship in Latin America
Type: Book
ISBN: 978-1-80071-955-2

Keywords

Article
Publication date: 4 January 2021

Carlos Enrique Torres-Aguilar, Pedro Moreno-Bernal, Jesús Xamán, Ivett Zavala Guillen and Irving Osiris Hernández-López

This paper aims to present an evolutionary algorithm (EA) to accelerate the convergence for the radiative transfer equation (RTE) numerical solution using high-order and…

112

Abstract

Purpose

This paper aims to present an evolutionary algorithm (EA) to accelerate the convergence for the radiative transfer equation (RTE) numerical solution using high-order and high-resolution schemes by the relaxation coefficients optimization.

Design methodology/approach

The objective function minimizes the residual value difference between iterations in each control volume until its difference is lower than the convergence criterion. The EA approach is evaluated in two configurations, a two-dimensional cavity with scattering media and absorbing media.

Findings

Experimental results show the capacity to obtain the numerical solution for both cases on all interpolation schemes tested by the EA approach. The EA approach reduces CPU time for the RTE numerical solution using SUPERBEE, SWEBY and MUSCL schemes until 97% and 135% in scattering and absorbing media cases, respectively. The relaxation coefficients optimized every two numerical solution iterations achieve a significant reduction of the CPU time compared to the deferred correction procedure with fixed relaxation coefficients.

Originality/value

The proposed EA approach for the RTE numerical solution effectively reduces the CPU time compared to the DC procedure with fixed relaxation coefficients.

Details

Engineering Computations, vol. 38 no. 6
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 14 June 2022

Juliette Senn, Mercedes Luque-Vílchez and Carlos Larrinaga

The purpose of this study is to provide insights into how accounting and accountability systems can contribute to transforming metrics used thus far in research…

Abstract

Purpose

The purpose of this study is to provide insights into how accounting and accountability systems can contribute to transforming metrics used thus far in research performance evaluation. New metrics are needed to increase research impact on the challenges addressed by science. In particular, we document and reflect on accounting transformations towards responsible research and innovation (RRI).

Design/methodology/approach

The study draws on the European H2020 MULTI-ACT research project that focuses on the development of a collective research impact framework in the area of health research. We document, analyse and report our engagement in this project, which also included research funders, patient organizations, health researchers, accounting practitioners and health care providers. Drawing on RRI, Mode 2 knowledge production and accounting performativity, we inquire into the potential of accounting technologies to foster knowledge production and increase research impact.

Findings

The study shows how the engagement of accounting with other disciplines enables the development of new and relevant forms of research impact assessment. We document how accounting can be mobilised for the development of new forms of research impact assessment (i.e. indicators that evaluate key accountability dimensions to promote RRI) and how it helps to overcome the difficulties that can emerge during this process. We also show how the design of multiple accountabilities’ indicators, although chronically partial, produced a generative interrogation and discussion about how to translate RRI to research assessment in a workable setting, and the pivotal role of certain circumstances (e.g. the presence of authoritative actors) that appear during the knowledge production process for creating these generative opportunities.

Practical implications

This study illustrates the key role of accounts in the generation of knowledge. It also shows the value of considering the stakes of all affected actors in devising fruitful accounting approaches. This collective perspective is timely in the accounting discipline and could foster the connection between academics and practice which is so far under-reported. This perspective should be useful for policymakers such as the European Union and managers in the design of new policies, initiatives and practices.

Social implications

Discussing and devising appropriate research assessment frameworks is strategic for the maximization of the social impact of research results. Accounting has a key role to play in optimizing a sustainable return on investment in research.

Originality/value

How to assess research impact in a more balanced way is in an early stage of development. The study provides empirical and practical material to advance further work and develop its potential to broaden the conceptualization of accountability.

Details

Sustainability Accounting, Management and Policy Journal, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 2040-8021

Keywords

Article
Publication date: 12 June 2020

Juan Manuel Bruno, Francisco J. Sarabia-Sanchez and Enrique Carlos Bianchi

This study verifies the influence of the dimensions of corporate social responsibility (CSR) practices and consumer involvement on the identification of the individual…

Abstract

Purpose

This study verifies the influence of the dimensions of corporate social responsibility (CSR) practices and consumer involvement on the identification of the individual with the company and the corporate reputation, moderated by the product category.

Design/methodology/approach

A covariance-based structural equation modelling is used to test the model, using a sample of 568 Argentine consumers. A multigroup analysis is employed to assess the moderating effect of the product category.

Findings

CSR practices have heterogeneous influence based on their dimension, and this influence is moderated by the product category. Accordingly, environmental practices promote consumer identification with the company, whereas those economically oriented have a direct influence on reputation. In contrast, social practices contribute to reputation if they are connected to the business model.

Research limitations/implications

The study is focussed on Argentina, analysing two product categories (laptops and financial services for final consumers) and using a large, but not strictly random, sample. In order to mainstream the results, it would be relevant to replicate the proposed model in other countries and with other product categories.

Originality/value

It provides information about the perception of consumers regarding the CSR practices from a multi-dimensional perspective, since they have an uneven effect on identification of consumer with the company and corporate reputation due to the moderating effect of the product category. The findings of this study may be relevant for managers of technology and banking service companies.

Propósito

El presente estudio comprueba la influencia de las dimensiones de las prácticas de responsabilidad social empresarial y de la implicación del consumidor sobre la identificación del individuo con la empresa y sobre la reputación empresarial, moderadas por la categoría de producto.

Metodología

Se aplican ecuaciones estructurales basadas en covarianzas para contrastar el modelo, empleando una muestra de 568 consumidores argentinos. Se efectúa un análisis multigrupo para analizar el efecto moderador de la categoría de producto.

Hallazgos

Las prácticas de RSE tienen influencia heterogénea según su dimensión, moderada la influencia por la categoría de producto. Así, las prácticas ambientales promueven la identificación del consumidor con la empresa mientras que aquéllas con orientación económica influyen directamente sobre la reputación. Por el contrario, las prácticas sociales contribuyen a la reputación si están vinculadas al modelo de negocio.

Limitaciones de la investigación

El estudio se ha focalizado en Argentina, analizando dos categorías de producto (computadoras portátiles y servicios financieros para consumidor final) y usando una muestra elevada pero no estrictamente aleatoria. Para generalizar los resultados sería relevante replicar el modelo planteado en otros países y otras categorías de producto.

Originalidad

Proporciona información sobre la percepción de los consumidores respecto de las prácticas de RSE desde una perspectiva multidimensional, pues éstas tienen efecto dispar sobre la identificación del consumidor con la empresa y la reputación empresarial dado el efecto moderador de la categoría de producto. Los hallazgos de este estudio pueden ser relevantes para gerentes de empresas de tecnología y de servicios bancarios.

Details

Academia Revista Latinoamericana de Administración, vol. 33 no. 3/4
Type: Research Article
ISSN: 1012-8255

Keywords

Article
Publication date: 5 March 2018

Urbi Garay

The purpose of this paper is to present the progress and trends of the literature on art as an investment and to outline potential research lines to be developed.

Abstract

Objective

The purpose of this paper is to present the progress and trends of the literature on art as an investment and to outline potential research lines to be developed.

Design/methodology/approach

This work gathers, analyses and critically discusses the attributes of investments in art in general, and in Latin American art in particular.

Findings

Most studies report that art (art in general, and Latin American in particular) has offered relatively low but positive real returns, which have tended to be below those offered by stocks and similar to those realized by bonds. Art has a low correlation with other investments.

Research limitations and implications

The literature on the attributes of Latin American art as an investment is limited and new research would help to close the knowledge gap with respect to this segment of the art market as it continues to grow.

Practical implications

Similarly to the research carried out into other segments of the art market, studies on Latin American art suggest that the works of art are worth more, ceteris paribus: the more renowned the artist, the larger the work, whether they were executed in oil, and if they were auctioned at Sotheby’s or Christie’s. The paper also details a series of practical implications for those who participate in the art market.

Originality/value

To the best of the authors’ knowledge, this is the first exhaustive review of the literature on the attributes of Latin American art as an investment. The findings of this study are useful for academics, art collectors, auction houses, gallerists and others who take part in the arts market.

Propósito

Presentar los avances y las tendencias de la literatura sobre el arte como inversión, y delinear líneas de investigación a ser desarrolladas.

Diseño/metodología/enfoque

Este trabajo reúne, analiza y discute críticamente los atributos de inversión del arte, en general, y latinoamericano, en particular.

Hallazgos

La mayoría de los estudios reportan que el arte (tanto el arte, en general, como el arte latinoamericano, en particular) ha ofrecido rendimientos reales positivos, aunque relativamente bajos, los cuales tienden a ser inferiores de los de las acciones y a ser similares a los de los bonos. El arte tiene una baja correlación con otras inversiones.

Limitaciones e implicaciones de la investigación

La literatura sobre los atributos del arte latinoamericano como inversión es limitada. Es de esperar que nuevas investigaciones permitan ir cerrando la brecha del conocimiento con respecto a esta parte del mercado del arte a la par que éste continúe creciendo.

Implicaciones prácticas

Los estudios de arte latinoamericano sugieren, similar a las investigaciones sobre otros segmentos del mercado del arte, que las obras de arte valen más, ceteris paribus: cuando el artista es más reputado, a medida que el área de las obras es mayor, si han sido ejecutadas en óleo, y cuando son subastadas en las casas de subastas Sotheby’s o Christie’s. En el trabajo se detallan, además, una serie de implicaciones prácticas para los participantes del mercado de arte.

Originalidad/valor

Hasta donde se ha podido comprobar, esta es la primera revisión exhaustiva acerca de los atributos del arte latinoamericano como inversión. Los resultados de esta investigación son de utilidad para: académicos, coleccionistas de arte, casas de subastas, galeristas, y demás participantes en el mercado del arte.

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