Monitoring leafy vegetables through packaging films with

Fresh-cut or minimally processed fruit and vegetables have been physically modified from its original form (by peeling, trimming, washing and cutting) to obtain a 100% edible product that is subsequently packaged (usually under modified atmosphere packaging –MAP) and kept in refrigerated storage. In fresh-cut products, physiological activity and microbiological spoilage, determine their deterioration and shelf-life. The major preservation techniques applied to delay spoilage are chilling storage and MAP, combined with chemical treatments antimicrobial solutions antibrowning, acidulants, antioxidants, etc.). The industry looks for safer alternatives. Consequently, the sector is asking for innovative, fast, cheap and objective techniques to evaluate the overall quality and safety of fresh-cut products in order to obtain decision tools for implementing new packaging materials and procedures. In recent years, hyperspectral imaging technique has been regarded as a tool for analyses conducted for quality evaluation of food products in research, control and industries. The hyperspectral imaging system allows integrating spectroscopic and imaging techniques to enable direct identification of different components or quality characteristics and their spatial distribution in the tested sample. The objective of this work is to develop hyperspectral image processing methods for the supervision through plastic films of changes related to quality deterioration in packed readyto-use leafy vegetables during shelf life. The evolutions of ready-to-use spinach and watercress samples covered with three different common transparent plastic films were studied. Samples were stored at 4 ºC during the monitoring period (until 21 days). More than 60 hyperspectral images (from 400 to 1000 nm) per species were analyzed using ad hoc routines and commercial toolboxes of MatLab®. Besides common spectral treatments for removing additive and multiplicative effects, additional correction, previously to any other correction, was performed in the images of leaves in order to avoid the modification in their spectra due to the presence of the plastic transparent film. Findings from this study suggest that the developed images analysis system is able to deal with the effects caused in the images by the presence of plastic films in the supervision of shelf-life in leafy vegetables, in which different stages of quality has been identified.

Hyperspectral to multispectral imaging for detection of tree nuts and peanut traces in wheat flour

In current industrial environments there is an increasing need for practical and inexpensive quality control systems to detect the foreign food materials in powder food processing lines. This demand is especially important for the detection of product adulteration with traces of highly allergenic products, such as peanuts and tree nuts. Manufacturing industries dealing with the processing of multiple powder food products present a substantial risk for the contamination of powder foods with traces of tree nuts and other adulterants, which might result in unintentional ingestion of nuts by the sensitised population. Hence, the need for an in-line system to detect nut traces at the early stages of food manufacturing is of crucial importance. In this present work, a feasibility study of a spectral index for revealing adulteration of tree nut and peanut traces in wheat flour samples with hyperspectral images is reported. The main nuts responsible for allergenic reactions considered in this work were peanut, hazelnut and walnut. Enhanced contrast between nuts and wheat flour was obtained after the application of the index. Furthermore, the segmentation of these images by selecting different thresholds for different nut and flour mixtures allowed the identification of nut traces in the samples. Pixels identified as nuts were counted and compared with the actual percentage of peanut adulteration. As a result, the multispectral system was able to detect and provide good visualisation of tree nut and peanut trace levels down to 0.01% by weight. In this context, multispectral imaging could operate in conjuction with chemical procedures, such as Real Time Polymerase Chain Reaction and Enzyme-Linked Immunosorbent Assay to save time, money and skilled labour on product quality control. This approach could enable not only a few selected samples to be assessed but also to extensively incorporate quality control surveyance on product processing lines.

Hyperspectral to multispectral imaging for detection of tree nuts and peanut traces in wheat flour.

In current industrial environments there is an increasing need for practical and inexpensive quality control systems to detect the foreign food materials in powder food processing lines. This demand is especially important for the detection of product adulteration with traces of highly allergenic products, such as peanuts and tree nuts. Manufacturing industries dealing with the processing of multiple powder food products present a substantial risk for the contamination of powder foods with traces of tree nuts and other adulterants, which might result in unintentional ingestion of nuts by the sensitised population. Hence, the need for an in-line system to detect nut traces at the early stages of food manufacturing is of crucial importance. In this present work, a feasibility study of a spectral index for revealing adulteration of tree nut and peanut traces in wheat flour samples with hyperspectral images is reported. The main nuts responsible for allergenic reactions considered in this work were peanut, hazelnut and walnut. Enhanced contrast between nuts and wheat flour was obtained after the application of the index. Furthermore, the segmentation of these images by selecting different thresholds for different nut and flour mixtures allowed the identification of nut traces in the samples. Pixels identified as nuts were counted and with the actual percentage of peanut adulteration. As a result, the multispectral system was able to detect and provide good visualisation of tree nut and peanut trace levels down to 0.01% by weight. In this context, multispectral imaging could operate in conjuction with chemical procedures, such as Real Time Polymerase Chain Reaction and Enzyme-Linked Immunosorbent Assay to save time, money and skilled labour on product quality control. This approach could enable not only a few selected samples to be assessed but also to extensively incorporate quality control surveyance on product processing lines.

PERSONAGENS INFANTIS DO CINEMA NA PROPAGANDA: UMA ESTRATÉGIA NA COMUNICAÇÃO AO PEQUENO CONSUMIDOR

Esta pesquisa tem como foco o varejo de produtos alimentícios que estão em amplo crescimento comercial com o uso de imagens de personagens de cinema infantil na propaganda para potencializar as marcas no mercado. O objetivo é conhecer e interpretar de forma científica, como o uso de imagens de personagens de cinema infantil na publicidade pode resultar no desejo de consumo pelo pequeno consumidor. A metodologia por experimento com crianças de 4 a 6 anos de idade serviu como base para que a questão da pesquisa fosse respondida a partir da aplicação de uma simulação de um ponto direto de venda (PDV). Biscoitos recheados com aplicação nas embalagens de personagens de cinema infantil assim como personagens de publicidade ficaram à disposição de compra do pequeno consumidor. Na conclusão do experimento, observa-se que a questão da pesquisa foi respondida, ressaltando que a publicidade de produtos alimentícios infantis com aplicação de personagens publicitários mantém condições de venda mais favoráveis do que publicidade de produtos alimentícios infantis com aplicação de personagens de cinema infantil, o que cria uma aversão ao discurso do senso comum.(AU)

PERSONAGENS INFANTIS DO CINEMA NA PROPAGANDA: UMA ESTRATÉGIA NA COMUNICAÇÃO AO PEQUENO CONSUMIDOR

Esta pesquisa tem como foco o varejo de produtos alimentícios que estão em amplo crescimento comercial com o uso de imagens de personagens de cinema infantil na propaganda para potencializar as marcas no mercado. O objetivo é conhecer e interpretar de forma científica, como o uso de imagens de personagens de cinema infantil na publicidade pode resultar no desejo de consumo pelo pequeno consumidor. A metodologia por experimento com crianças de 4 a 6 anos de idade serviu como base para que a questão da pesquisa fosse respondida a partir da aplicação de uma simulação de um ponto direto de venda (PDV). Biscoitos recheados com aplicação nas embalagens de personagens de cinema infantil assim como personagens de publicidade ficaram à disposição de compra do pequeno consumidor. Na conclusão do experimento, observa-se que a questão da pesquisa foi respondida, ressaltando que a publicidade de produtos alimentícios infantis com aplicação de personagens publicitários mantém condições de venda mais favoráveis do que publicidade de produtos alimentícios infantis com aplicação de personagens de cinema infantil, o que cria uma aversão ao discurso do senso comum.(AU)

Cyanogenesis in Cassava1 : The Role of Hydroxynitrile Lyase in Root Cyanide Production

In the cyanogenic crop cassava (Manihot esculenta, Crantz), the final step in cyanide production is the conversion of acetone cyanohydrin, the deglycosylation product of linamarin, to cyanide plus acetone. This process occurs spontaneously at pH greater than 5.0 or enzymatically and is catalyzed by hydroxynitrile lyase (HNL). Recently, it has been demonstrated that acetone cyanohydrin is present in poorly processed cassava root food products. Since it has generally been assumed that HNL is present in all cassava tissues, we reinvestigated the enzymatic properties and tissue-specific distribution of HNL in cassava. We report the development of a rapid two-step purification protocol for cassava HNL, which yields an enzyme that is catalytically more efficient than previously reported (Hughes, J., Carvalho, F., and Hughes, M. [1994] Arch Biochem Biophys 311: 496–502). Analyses of the distribution of HNL activity and protein indicate that the accumulation of acetone cyanohydrin in roots is due to the absence of HNL, not to inhibition of the enzyme. Furthermore, the absence of HNL in roots and stems is associated with very low steady-state HNL transcript levels. It is proposed that the lack of HNL in cassava roots accounts for the high acetone cyanohydrin levels in poorly processed cassava food products.

Antecedentes históricos de la actividad dietética en España: los trabajos del Laboratorio de Higiene de la Alimentación de la Escuela Nacional de Sanidad (1932-1936)

Se analiza la actividad dietética desarrollada por la Escuela Nacional de Sanidad entre 1932 y 1936. Como principal fuente de información se han utilizado los trabajos publicados por el personal adscrito a su Laboratorio de Higiene de la Alimentación. Con el objeto de poder confeccionar regímenes dietéticos adaptados a la realidad española, se pretendía investigar la composición química (agua, fécula, proteínas, grasa y sales minerales) de los alimentos españoles y su contenido vitamínico. Se estudiaron, siguiendo las recomendaciones y los criterios de los organismos internacionales, algunos de los productos de consumo más frecuente, como aceite de oliva, patatas, tomates frescos y en lata, fresa, fresón, peras, ciruelas e higo chumbo, además de algunas conservas. Los resultados obtenidos ponían de manifiesto las diferencias que existían con los datos ofrecidos por autores extranjeros, entre las que destacaba la mayor riqueza vitamínica de productos como el aceite de oliva andaluz o el tomate fresco valenciano. Estas diferencias se atribuían al factor geoclimático. También se estudiaron, en el caso del cocido, la paella y la yema de huevo, las modificaciones que podían producir los procesos culinarios en la composición de los alimentos empleados.

Stabilizing and Modulating Color by Copigmentation: Insights from Theory and Experiment

Natural anthocyanin pigments/dyes and phenolic copigments/co-dyes form noncovalent complexes, which stabilize and modulate (in particular blue, violet, and red) colors in flowers, berries, and food products derived from them (including wines, jams, purees, and syrups). This noncovalent association and their electronic and optical implications constitute the copigmentation phenomenon. Over the past decade, experimental and theoretical studies have enabled a molecular understanding of copigmentation. This review revisits this phenomenon to provide a comprehensive description of the nature of binding (the dispersion and electrostatic components of π–π stacking, the hydrophobic effect, and possible hydrogen-bonding between pigment and copigment) and of spectral modifications occurring in copigmentation complexes, in which charge transfer plays an important role. Particular attention is paid to applications of copigmentation in food chemistry.

Uso sustentável de pesticidas : análise comparativa entre a União Europeia e o Brasil

Tese de doutoramento, Ciências do Ambiente, Universidade de Lisboa, Faculdade de Ciências, 2016

Russia’s Punitive Trade Policy Measures towards Ukraine, Moldova and Georgia. CEPS Working Document No. 400, September 2014

While EU and US sanctions against Russia over its aggression in Ukraine, and Russia’s counter-sanctions, are much discussed due to their evident political significance, less attention has been given to Russia’s punitive sanctions against the three Eastern European states – Ukraine, Moldova and Georgia – that have signed with the EU Association Agreements (AA), which include Deep and Comprehensive Free Trade Area (DCFTA) provisions. This paper therefore documents these trade policy restrictions and embargoes imposed by Russia, and provides some first indications of their impact. The immediate impact on trade flows, especially for agri-food products, has been substantial, albeit with some leakage through Belarus. The main instrument for the Russian measures has been allegations of non-conformity with Russian technical standards, although the correlation of these allegations with movements in Russia’s geopolitical postures makes it obvious that the Russian technical agencies are following political guidelines dressed up as scientific evidence. These measures also push the three states into diversifying their trade marketing efforts in favour of the EU and other world markets, with Georgia already having taken significant steps in this direction, since in its case the Russian sanctions date back to 2006. In the case of Ukraine, Russia’s threat to cancel CIS free trade preferences infiltrated trilateral talks between the EU, Ukraine and Russia, leading on 12 September to their proposed postponement until the end of 2015 of the ‘provisional’ implementation of a large part of the AA/DCFTA. This was immediately followed on 16 September by ratification of the AA/DCFTA by both the Rada in Kyiv and the European Parliament, which will lead to its full and definitive entry into force when the 28 EU member states have also ratified it. However Putin followed the day after with a letter to Poroshenko making an abusive interpretation of the 12 September understanding.

Imports into the United States for consumption, by countries, for the calendar year 1936. W. P. A. statistical project 265-31-7000, Richmond, Virginia ...

"Compiled from preliminary statistics of imports supplied by the Department of commerce."

Grown from the heart in the heartland cookbook : a collection of Illinois product recipes /

Contains a collection of recipes highlighting Illinois food products with a directory of community farmers markets in Illinois plus sections on measurements and helpful & healthful hints.

Non-additivity of attractive potentials in modeling of N-2 and Ar adsorption isotherms on graphitized carbon black and porous carbon by means of density functional theory

We present a new approach accounting for the nonadditivity of attractive parts of solid-fluid and fluidfluid potentials to improve the quality of the description of nitrogen and argon adsorption isotherms on graphitized carbon black in the framework of non-local density functional theory. We show that the strong solid-fluid interaction in the first monolayer decreases the fluid-fluid interaction, which prevents the twodimensional phase transition to occur. This results in smoother isotherm, which agrees much better with experimental data. In the region of multi-layer coverage the conventional non-local density functional theory and grand canonical Monte Carlo simulations are known to over-predict the amount adsorbed against experimental isotherms. Accounting for the non-additivity factor decreases the solid-fluid interaction with the increase of intermolecular interactions in the dense adsorbed fluid, preventing the over-prediction of loading in the region of multi-layer adsorption. Such an improvement of the non-local density functional theory allows us to describe experimental nitrogen and argon isotherms on carbon black quite accurately with mean error of 2.5 to 5.8% instead of 17 to 26% in the conventional technique. With this approach, the local isotherms of model pores can be derived, and consequently a more reliab * le pore size distribution can be obtained. We illustrate this by applying our theory against nitrogen and argon isotherms on a number of activated carbons. The fitting between our model and the data is much better than the conventional NLDFT, suggesting the more reliable PSD obtained with our approach.

Multicomponent adsorption on activated carbons under supercritical conditions

Adsorption of binary mixtures onto activated carbon Norit R1 for the system nitrogen-methane-carbon dioxide was investigated over the pressure range up to 15 MPa. A new model is proposed to describe the experimental data. It is based on the assumption that an activated carbon can be characterized by the distribution function of elements of adsorption volume (EAV) over the solid-fluid potential. This function may be evaluated from pure component isotherms using the equality of the chemical potentials in the adsorbed phase and in the bulk phase for each EAV. In the case of mixture adsorption a simple combining rule is proposed, which allows determining the adsorbed phase density and its composition in the EAV at given pressure and compositions of the bulk phase. The adsorbed concentration of each adsorbate is the integral of its density over the set of EAV. The comparison with experimental data on binary mixtures has shown that the approach works reasonably well. In the case of high-pressure binary mixture adsorption, when only total amount adsorbed was measured, the proposed model allows reliably determining partial amounts of the adsorbed components. (C) 2004 Elsevier Inc. All rights reserved.