Search results

1 – 10 of 349
To view the access options for this content please click here
Article
Publication date: 10 December 2019

Mariana Crivelari Da Cunha, Patrícia da Silva Machado, Ana Beatriz Silva Araújo, Elisângela Elena Nunes Carvalho and Eduardo Valério de Barros Vilas Boas

The potential of the Cerrado fruit could be explored by development of new products, such as jellies that can be used to add value to the fruit, as well as to preserve…

Abstract

Purpose

The potential of the Cerrado fruit could be explored by development of new products, such as jellies that can be used to add value to the fruit, as well as to preserve this biome. This paper aims to evaluate the effect of processing, the glass packaging type and storage time on the quality of jelly, prepared from reconstituted murici pulp, over 12 months of storage.

Design/methodology/approach

The authors used a completely randomized design (CRD) in factorial 2 × 5, with two types of glass packaging (transparent and amber) and five storage periods (0, 3, 6, 9 and 12 months), with four replications and the experimental parcel consisting of 80 g of jelly (two bottles of 40 g). The quality of jelly was monitored through 12 months using physicochemical (proximal composition, color, soluble solids, titratable acidity and pH), microbiological (coliforms at 35 °C and 45 °C, filamentous fungi and Salmonella sp) and sensory analyses (sensory acceptance and purchase intent).

Findings

The pulp processing effectively affected the physicochemical and nutritional composition (proximal composition, soluble solids and color). It was found that only the storage time significantly influenced (p < 0.05) jelly quality, considering the variables analyzed, except the soluble solids, ash, dietary fiber and sensory texture attributes. However, the glass packaging factor (transparent and amber) did not result in significant changes in those variables. Moreover, the pulp processing allows a seasonal fruit with a short harvest period and short post-harvest life to be available to consumers as a new product throughout the year.

Originality/value

Based on the present study, the native Cerrado fruit such as murici [Byrsonima crassifolia (L.) Rich] is appreciated for its pleasant peculiarities such as color, aroma and taste; however, it is underutilized as food for lack of information and studies. Although the fruit does not have widespread use as food, it is necessary to make the population aware about its importance, not only as a source of nutrients, but also for its functional and sensory potential. Therefore, the production of murici jelly can increase consumption of the fruit, besides being a way to add value and extend the shelf life and sensory acceptance of the product prepared.

Details

Nutrition & Food Science , vol. 50 no. 5
Type: Research Article
ISSN: 0034-6659

Keywords

To view the access options for this content please click here
Article
Publication date: 26 April 2018

Vania Silva Carvalho and Ana Carolina Conti-Silva

This paper aims to examine the bioactive compounds and texture properties of cereal bars formulated with banana peel flour during storage.

Abstract

Purpose

This paper aims to examine the bioactive compounds and texture properties of cereal bars formulated with banana peel flour during storage.

Design/methodology/approach

Seven cereal bars were produced and stored during 11 months, under vacuum and protected from the light. The total phenolic compounds, the activity antioxidant by ABTS [2,2′-Azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)] method, the DPPH (2,2-diphenyl-1-picryl-hydrazyl-hydrate) method expressed as EC50 (concentration required to reduce the original amount of free radicals by 50 per cent) and texture properties were evaluated over the storage period.

Findings

In general, total phenolic compounds decreased during storage (from 4.19 to 1.11 mg GAE. g-1f.w.). Although the total antioxidant activity (ABTS method) increased during the fifth month, it reduced during storage (from 3.41 to 0.30 µmol TE.g-1f.w.); and the EC50 was not modified in many formulations, though it decreased in other formulations during storage period (from 3913 to 19221 g fruit.g-1 DPPH). The force of rupture began to increase in the fourth month (reaching 62.4 N), and hardness began to increase in the ninth month (reaching 444 N). The formulation and time factors influenced the total phenolic compounds, total antioxidant activity (ABTS method), force of rupture and hardness, while EC50 was only influenced by the formulation (p-value = 0.001). A principal component analysis showed that time had little effect on the most important characteristics considered in description of the cereal bars.

Originality/value

Cereal bars can be consumed up to the third month of storage, considering the texture of the products. Moreover, the presence of bioactive compounds in cereal bars depends on the addition of banana peel flour, which it contributes to the insertion of total phenolic compounds and total antioxidant activity in cereal bars, aggregating functional properties in these products.

Details

Nutrition & Food Science, vol. 48 no. 3
Type: Research Article
ISSN: 0034-6659

Keywords

To view the access options for this content please click here
Article
Publication date: 9 May 2016

Tatiane Ferreira da Silva and Ana Carolina Conti-Silva

The purpose of this paper was to replace totally the wheat flour for rice flour, whole soy flour and cassava starch in the formulation of chocolate cookies.

Abstract

Purpose

The purpose of this paper was to replace totally the wheat flour for rice flour, whole soy flour and cassava starch in the formulation of chocolate cookies.

Design/methodology/approach

Chocolate cookies with wheat flour, rice flour, whole soy flour and cassava starch were produced, and compared to a commercial chocolate cookie regarding to physical properties and sensory acceptability.

Findings

The chocolate cookie made with rice flour instead of wheat flour was as liked as the cookie with wheat flour, and the greater acceptability scores received by the rice flour cookies correlated with less colour intensity and a lower specific volume thereof. The cookie with cassava starch stood out because of the intensities of its parameters, its more intense colour, and its acceptability scores among the consumers. The cookie with whole soy flour had lower sensory acceptability scores, and the commercial cookie stood out for its high cutting force (instrumental texture).

Originality/value

Celiac consumers desire products with adequate sensory characteristics. This study presents a new gluten-free product, the chocolate cookie made with rice flour, that has the potential to be produced, as this product is as accepted as a cookie made with wheat flour, and even more accepted than a commercial one also made with wheat flour. Therefore, this study offers subsidies for improving the diet of celiac consumers.

Details

Nutrition & Food Science, vol. 46 no. 3
Type: Research Article
ISSN: 0034-6659

Keywords

To view the access options for this content please click here
Article
Publication date: 3 April 2018

Acácia Gonçalves Ferreira Leal, Rodrigo Luiz Vancini, Paulo Gentil, Ana Amélia Benedito-Silva, Antonio Carlos da Silva, Mário Hebling Campos, Marilia Santos Andrade and Claudio Andre Barbosa de Lira

The purpose of this paper was to assess the knowledge on sport and exercise science held by a sample of Brazilian physiotherapists, nutritionists and physical educators.

Abstract

Purpose

The purpose of this paper was to assess the knowledge on sport and exercise science held by a sample of Brazilian physiotherapists, nutritionists and physical educators.

Design/methodology/approach

A cross-sectional research design was used. The answers given by 1,147 professionals (300 physiotherapists, 705 physical educators and 142 nutritionists) who participated in a qualifying process for a specialization course on exercise physiology were analyzed. Questions were analyzed on maximal oxygen uptake (four questions), physical fitness assessment (three questions), physical training (two questions), bioenergetics (one question) and exercise in extreme environments (one question).

Findings

The results revealed misconceptions held by Brazilian health professionals on a number of concepts related to sport and exercise science, such as maximal oxygen uptake.

Practical implications

These results reinforce the need for continuing education programs to maximize the quality of the service provided by sport and exercise science professionals in Brazil. Improvements in the undergraduate courses curriculum are also recommended.

Originality/value

This is the first study to assess misconceptions about sport and exercise science among Brazilian health professionals.

Details

Health Education, vol. 118 no. 3
Type: Research Article
ISSN: 0965-4283

Keywords

To view the access options for this content please click here
Article
Publication date: 19 June 2017

João Morgado, Inês Flores-Colen, Jorge de Brito and Ana Silva

The purpose of this paper is to propose a maintenance programme for flat roofs in existing buildings, based on the inspection of 26 buildings in-service conditions…

Abstract

Purpose

The purpose of this paper is to propose a maintenance programme for flat roofs in existing buildings, based on the inspection of 26 buildings in-service conditions, located in the Lisbon region, in Portugal. A proactive maintenance of flat roofs in existing buildings allows reducing their pathology, thus improving their performance and service life.

Design/methodology/approach

The maintenance plan was established based on the degradation state of the maintenance source elements (MSEs) analysed, the aggressiveness of the surrounding environment and the age of the roofs and maintenance actions carried out during the roofing systems’ life cycle.

Findings

The maintenance plan proposed in this study includes the prioritization of the interventions, the definition of the required maintenance operations and the definition of the frequency of the intervention, considering the service lives of the MSEs.

Research limitations/implications

The study addresses only roofs located in the Lisbon area. Even though a relatively large sample of 26 roofs was used, the findings and conclusions can clearly be extrapolated for a much wider scope.

Practical implications

The maintenance plan proposed in this study considers a planning of proactive maintenance operations to continuously and effectively monitor all the relevant MSE.

Originality/value

This plan allows minimizing the incidence and spread of defects, thus enabling the optimization of resources, reducing the costs of the entire maintenance system and improving the quality of the built environment.

Details

Property Management, vol. 35 no. 3
Type: Research Article
ISSN: 0263-7472

Keywords

To view the access options for this content please click here
Article
Publication date: 2 September 2019

Carla Ferreira, Lina Lourenço-Gomes, Lígia M. Costa Pinto and Ana Patrícia Silva

The purpose of this paper is to analyze the existence and influence of gender effects on wine choice, specifically whether women and men seek the same cues in wine labelling.

Abstract

Purpose

The purpose of this paper is to analyze the existence and influence of gender effects on wine choice, specifically whether women and men seek the same cues in wine labelling.

Design/methodology/approach

Five focus groups, involving 45 regular wine consumers (22 women and 23 men) from four Portuguese wine regions of origin, were conducted. Sessions included two projective techniques. To gather more information, participants were asked to fill a short questionnaire, relating purchasing and consumption habits, knowledge and socioeconomic characteristics. Qualitative data were transcribed verbatim and content analysis was used.

Findings

Women frequently associate wine to the context of consumption; while men frequently associate wine to convivial and sensorial pleasure. Region of origin and prior knowledge experience seem to be the two main reasons for men to choose a wine; while, women seem to rely more on wine brand and previous experience. Front label information (region of origin, awards and region illustration) seems to be more important for women, while the back label descriptors (grape variety, world heritage site and wine history) are more relevant for men. The typography (font size) and information type were identified as negative aspects of the back label.

Practical implications

Understanding how men and women looking for information on a wine bottle can help marketers communicate with specific market segments. This paper provides insights to design marketing campaigns regarding product customization at the level of label information and design.

Originality/value

The present research contributes to current literature on wine consumer behaviour, exploring behavioural differences, perceptions and motivations by gender. In particular, the relevance of wine cues for choice decision is explored. The evidence of focus groups combined with projective techniques is complemented with data collected through a questionnaire.

Details

International Journal of Wine Business Research, vol. 31 no. 4
Type: Research Article
ISSN: 1751-1062

Keywords

To view the access options for this content please click here
Article
Publication date: 7 November 2016

Ana Catarina Silva and Maria Manuel Borges

The purpose of this paper is to provide a characterization of the editorial design methods of technical books in a hybrid publishing context.

Abstract

Purpose

The purpose of this paper is to provide a characterization of the editorial design methods of technical books in a hybrid publishing context.

Design/methodology/approach

The paper starts by characterizing editorial design as a discipline itself within graphic design, which is then further identified as in urgent need to adapt strategies to technologies, communication processes and existing information flows. Along with the literature review, the paper includes an analysis of one particular case study, O’Reilly Media.

Findings

The paper provides arguments to conclude that the classical approach to the designer’s workflow should be reviewed and the way of framing the editorial problem should also be different: it should focus on the content.

Originality/value

The paper includes implications for the improvement of digital workflows and design processes in the STM hybrid publishing field.

Details

The Electronic Library, vol. 34 no. 6
Type: Research Article
ISSN: 0264-0473

Keywords

To view the access options for this content please click here
Article
Publication date: 12 March 2018

Maria Joao Pinho Moreira, Ana Silva, Cristina Saraiva and José Manuel Marques Martins de Almeida

Consumption of game meat is growing when compared to other meats. It is susceptible to adulteration because of its cost and availability. Spectroscopy may lead to rapid…

Abstract

Purpose

Consumption of game meat is growing when compared to other meats. It is susceptible to adulteration because of its cost and availability. Spectroscopy may lead to rapid methodologies for detecting adulteration. The purpose of this study is to detect the adulteration of wild fallow deer (Dama dama) meat with domestic goat (G) (Capra aegagrus hircus) meat, for samples stored for different periods of time using Fourier transform infrared (FTIR) spectroscopy coupled with chemometric.

Design/methodology/approach

Meat was cut and mixed in different percentages, transformed into mini-burgers and stored at 3°C from 12 to 432 h and periodically examined for FTIR, pH and microbial analysis. Principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) were applied to detect adulteration.

Findings

The PCA model, applied to the spectral region from 1,138 to 1,180, 1,314 to 1,477, 1,535 to 1,556 and from 1,728 to 1,759 cm−1, describes the adulteration using four principal components which explained 95 per cent of variance. For the levels of Adulteration A1 (pure meat), A2 (25 and 50 %w/wG) and A3 (75 and 100 %w/wG) for an external set of samples, the correlation coefficients for prediction were 0.979, 0.941 and 0.971, and the room mean square error were 8.58, 12.46 and 9.47 per cent, respectively.

Originality/value

The PLS-DA model predicted the adulteration for an external set of samples with high accuracy. The proposed method has the advantage of allowing rapid results, despite the storage time of the adulterated meat. It was shown that FTIR combined with chemometrics can be used to establish a methodology for the identification of adulteration of game meat, not only for fresh meat but also for meat stored for different periods of time.

Details

Nutrition & Food Science, vol. 48 no. 2
Type: Research Article
ISSN: 0034-6659

Keywords

To view the access options for this content please click here
Article
Publication date: 17 July 2020

Carlos Francisco Alves and Ana Luísa Silva

Investor relations literature reports that after an era that “the higher the stock price, the better”, currently investor relations entered into a new era where…

Abstract

Purpose

Investor relations literature reports that after an era that “the higher the stock price, the better”, currently investor relations entered into a new era where “overvaluation is perhaps as bad as undervaluation” (Laskin, 2018a, p. 19). This paper searches for evidence on whether news coverage around abnormal returns indicates that corporate communication effectively seek fair value prices.

Design/methodology/approach

Using data of the Portuguese market, it investigates if the news coverage and the investor relations' influence on such coverage (namely as a source of the news) are symmetrical before and after extreme abnormal positive or negative returns. This paper uses event study methodology, performs content analysis and applies statistical and econometric analyses.

Findings

The findings are consistent with the idea that companies communicate differently in face of positive and negative abnormal returns. Particularly, before the event, companies are more frequently cited as a source of the news for positive events. This indicates that companies seek to capitalize the positive impact of the favourable subsequent disclosures. After the occurrence of abnormal returns, companies are more often a source of the news for negative cases, seeking to mitigate their impact. Additionally, after negative events companies are more frequently mentioned in the news with a positive content than they are mentioned before.

Social implications

The new approach of this study allows the companies' information stakeholders (namely investors and regulators) to become more informed and critical in the analysis of news coverage and its sources.

Originality/value

As far as the authors of the paper know, this is the first study that addresses the question of eventual asymmetric behaviour of companies’ communication in face of positive and negative abnormal returns.

Details

Corporate Communications: An International Journal, vol. 26 no. 2
Type: Research Article
ISSN: 1356-3289

Keywords

To view the access options for this content please click here
Article
Publication date: 28 November 2018

Alexandra Pereira Nunes, Ana Rita Silva Gaspar, Andry M. Pinto and Aníbal Castilho Matos

This paper aims to present a mosaicking method for underwater robotic applications, whose result can be provided to other perceptual systems for scene understanding such…

Abstract

Purpose

This paper aims to present a mosaicking method for underwater robotic applications, whose result can be provided to other perceptual systems for scene understanding such as real-time object recognition.

Design/methodology/approach

This method is called robust and large-scale mosaicking (ROLAMOS) and presents an efficient frame-to-frame motion estimation with outlier removal and consistency checking that maps large visual areas in high resolution. The visual mosaic of the sea-floor is created on-the-fly by a robust registration procedure that composes monocular observations and manages the computational resources. Moreover, the registration process of ROLAMOS aligns the observation to the existing mosaic.

Findings

A comprehensive set of experiments compares the performance of ROLAMOS to other similar approaches, using both data sets (publicly available) and live data obtained by a ROV operating in real scenes. The results demonstrate that ROLAMOS is adequate for mapping of sea-floor scenarios as it provides accurate information from the seabed, which is of extreme importance for autonomous robots surveying the environment that does not rely on specialized computers.

Originality/value

The ROLAMOS is suitable for robotic applications that require an online, robust and effective technique to reconstruct the underwater environment from only visual information.

Details

Sensor Review, vol. 39 no. 3
Type: Research Article
ISSN: 0260-2288

Keywords

1 – 10 of 349