Arsenic Bioaccessibility in Cooked Rice as Affected by Arsenic in Cooking Water

Rice can easily accumulate arsenic (As) into its grain and is known to be the highest As-containing cereal. In addition, the As burden in rice may increase during its processing (such as when cooking using As-polluted water). The health risk posed by the presence of As in cooked rice depends on its release from the matrix along the digestive system (bioaccessibility). Two types of white polished long-grain rice, namely, nonparboiled and parboiled (total As: 202 and 190 mu g As kg(-1), respectively), were cooked in excess of water with different levels of As (0, 10, 47, 222, and 450 mu g As L-1). The bioaccessibility of As from these cooked rice batches was evaluated with an in vitro dynamic digestion process. Rice cooked with water containing 0 and 10 mu g As L-1 showed lower As concentrations than the raw (uncooked) rice. However, cooking water with relatively high As content (>= 47 mu g As L-1) significantly increased the As concentration in the cooked rice up to 8- and 9-fold for the nonparboiled and parboiled rice, respectively. Parboiled rice, which is most widely consumed in South Asia, showed a higher percentage of As bioaccessibility (59% to 99%) than nonparboiled rice (36% to 69%) and most of the As bioaccessible in the cooked rice (80% to 99%) was released easily during the first 2 h of digestion. The estimation of the As intake through cooked rice based on the As bioaccessibility highlights that a few grams of cooked rice (less than 25 g dry weight per day) cooked with highly As contaminated water is equivalent to the amount of As from 2 L water containing the maximum permissible limit (10 mu g As L-1).

Effect of cooking method and rice type on arsenic concentration in cooked rice and the estimation of arsenic dietary intake in a rural village in West Bengal, India

Arsenic (As) contamination of rice plants can result in high total As concentrations (t-As) in cooked rice, especially if As-contaminated water is used for cooking. This study examines two variables: (1) the cooking method (water volume and inclusion of a washing step); and (2) the rice type (atab and boiled). Cooking water and raw atab and boiled rice contained 40 g As l-1 and 185 and 315 g As kg-1, respectively. In general, all cooking methods increased t-As from the levels in raw rice; however, raw boiled rice decreased its t-As by 12.7% when cooked by the traditional method, but increased by 15.9% or 23.5% when cooked by the intermediate or contemporary methods, respectively. Based on the best possible scenario (the traditional cooking method leading to the lowest level of contamination, and the atab rice type with the lowest As content), t-As daily intake was estimated to be 328 g, which was twice the tolerable daily intake of 150 g.

Determination of the persistence of dimetridazole, metronidazole and ronidazole residues in black tiger shrimp (Penaeus monodon) tissue and stability during cooking

The depletion of three banned nitroimidazole drugs (dimetridazole (DMZ), metronidazole (MNZ) and ronidazole (RNZ)) was investigated in black tiger shrimp (Penaeus monodon) following in-water medication. The highest concentrations of residues were measured immediately after the 24 h immersion (day 0). At this time, MNZ and MNZ-OH residues were measured in shrimp tissue samples at concentrations ranging from 361–4189 and 0.28–6.6 μg kg−1, respectively. DMZ and its metabolites HMMNI ranged in concentration between 31509–37780 and 15.0–31.9 μg kg−1, respectively. RNZ and HMMNI concentrations ranged 14530–24206 and 25.0–55 μg kg−1, respectively. MNZ, DMZ and RNZ were the more persistent marker residues and can be detected for at least eight days post-treatment. MNZ-OH was only detectable on day 0 following treatment with MNZ. HMMNI residues were only detectable up to day 1 (0.97–3.2 μg kg−1) or 2 (1.2–4.5 μg kg−1) following DMZ and RNZ treatment, respectively. The parent drugs, MNZ, DMZ and RNZ were still measureable on day 8 at 0.12–1.00, 40.5–55 and 8.8–18.7 μg kg−1, respectively. The study also investigated the stability of nitroimidazole residues under various cooking procedures (frying, grilling, boiling and boiling followed by microwaving). The experiments were carried out in shrimp muscle tissue containing both high and low concentrations of these residues. Different cooking procedures showed the impact on nitroimidazole residue concentration in shrimp tissuetheir concentration depleted significantly, but partially, by boiling and/or microwaving but the compounds were largely resistant to conventional grilling or frying. Cooking cannot therefore be considered as a safeguard against harmful nitroimidazole residues in shrimp.

Hydroprocessing of waste cooking oil over a dispersed nano catalyst: Kinetics study and temperature effect

The kinetics of hydrodeoxygenation of waste cooking oil (WCO) is investigated with unsupported CoMoS catalysts. A kinetic model is established and a comprehensive analysis of each reaction pathway is carried out. The results show that hydrodecarbonylation/decarboxylation (HDC) routes are the predominant reaction pathways in the elimination of oxygen, with the rate constant three times as high as that of hydrodeoxygenation (HDO). However, the HDC activity of the CoMoS catalyst deactivates due to gradual loss of sulfur from the catalyst. HDO process is insensitive to the sulfur deficiency. The kinetic modeling shows that direct hydrodecarbonylation of fatty acids dominates the HDC routes and, in the HDO route, fatty acids are transferred to aldehydes/alcohols and then to C-18 hydrocarbons, a final product, and the reduction of acids is the rate limiting step. The HDO route via alcohols is dominant over aldehydes due to a significantly higher reaction rate constant. The difference of C-18/C-17 ratio in unsupported and supported catalysts show that a support with Lewis acid sites may play an important role in the selectivity for the hydrodeoxygenation pathways and promoting the final product quality

Rethinking Rice Preparation for Highly Efficient Removal of Inorganic Arsenic Using Percolating Cooking Water

A novel way of cooking rice to maximize the removal of the carcinogen inorganic arsenic (Asi) is presented here. In conventional rice cooking water and grain are in continuous contact, and it is known that the larger the water:rice cooking ratio, the more Asi removed by cooking, suggesting that the Asi in the grain is mobile in water. Experiments were designed where rice is cooked in a continual stream of percolating near boiling water, either low in Asi, or Asi free. This has the advantage of not only exposing grain to large volumes of cooking water, but also physically removes any Asi leached from the grain into the water receiving vessel. The relationship between cooking water volume and Asi removal in conventional rice cooking was demonstrated for the rice types under study. At a water-to-rice cooking ratio of 12:1, 57±5% of Asi could be removed, average of 6 wholegrain and 6 polished rice samples. Two types of percolating technology were tested, one where the cooking water was recycled through condensing boiling water steam and passing the freshly distilled hot water through the grain in a laboratory setting, and one where tap water was used to cook the rice held in an off-the-shelf coffee percolator in a domestic setting. Both approaches proved highly effective in removing Asi from the cooking rice, with up to 85% of Asi removed from individual rice types. For the recycled water experiment 59±8% and 69±10% of Asi was removed, on average, compared to uncooked rice for polished (n=27) and wholegrain (n=13) rice, respectively. For coffee percolation there was no difference between wholegrain and polished rice, and the effectiveness of Asi removal was 49±7% across 6 wholegrain and 6 polished rice samples. The manuscript explores the potential applications and further optimization of this percolating cooking water, high Asi removal, discovery.

Spectacles of military urbanism in online representations of the Elite Squad of the military police of Rio de Janeiro: a multimodal approach

This paper presents a multimodal analysis of online self-representations of the Elite Squad of the military police of Rio de Janeiro, the Special Police Operations Battalion BOPE. The analysis is placed within the wider context of a “new military urbanism”, which is evidenced in the ongoing “Pacification” of many of the city’s favelas, in which BOPE plays an active interventionist as well as a symbolic role, and is a kind of solution which clearly fails to address the root causes of violence which lie in poverty and social inequality. The paper first provides a sociocultural account of BOPE’s role in Rio’s public security and then looks at some of the mainly visual mediated discourses the Squad employs in constructing a public image of itself as a modern and efficient, yet at the same time “magical” police force.

What’s behind Russia’s military build-up in Syria?

It seems unlikely that Moscow can hope for an outright victory in Syria’s civil war, so some kind of political compromise with the moderate opposition is in the offing. This, however, is at best a long shot given the hostility to Assad in the West and the intensity of the conflict in Syria.

Instead, the immediate priority seems to be to ensure a survival of the Syrian state and military institutions in the areas it can control, what one Russian observer called an “Alawite Israel” – a strip of land from the Mediterranean coast to Damascus, able to at least contain IS with some external support.

The Kremlin has consistently prioritised stability over revolutionary change and sovereign rights over humanitarian intervention. In fact, from the Russian point of view, the Western interventionist agenda of democratisation, which ignored local conditions, has made the situation in the Middle East worse – from Iraq to Libya and Syria.

Domestic Cooking and Food Skills: A Review

Domestic cooking skills (CS) and food skills (FS) encompass multiple components, yet there is a lack of consensus on their constituent parts, inter-relatedness or measurement, leading to limited empirical support for their role in influencing dietary quality. This review assessed the measurement of CS and FS in adults (>16 years); critically examining study designs, psychometric properties of measures, theoretical basis and associations of CS/FS with diet. Electronic databases (PsychInfo), published reports and systematic reviews on cooking and home food preparation interventions (Rees et al. 2012 ; Reicks et al. 2014 ) provided 834 articles of which 26 met the inclusion criteria. Multiple CS/FS measures were identified across three study designs: qualitative; cross-sectional; and dietary interventions; conducted from 1998-2013. Most measures were not theory-based, limited psychometric data was available, with little consistency of items or scales used for CS/FS measurements. Some positive associations between CS/FS and FV intake were reported; though lasting dietary changes were uncommon. The role of psycho-social (e.g., gender, attitudes) and external factors (e.g. food availability) on CS/FS is discussed. A conceptual framework of CS/FS components is presented for future measurement facilitation, which highlights the role for CS/FS on food-related behaviour and dietary quality. This will aid future dietary intervention design.

'Rosie Hackett, the Irish Citizen Army and the Military Service Pensions Collection'

This chapter uses the newly released Military Service Pensions files to examine the contribution of Rosana 'Rosie' Hackett and the members of the Irish Citizen Army to the Irish revolution. It also includes and assessment of the collection as a source for studying the revolution and assesses how it helps reassess the role of the ICA in the revolution. It was produced to mark the naming of a Liffey bridge in Dublin after Rosie Hackett

Tanzanian scepticism of a militarised East African Federation and underlying military concerns

Attitudes towards a regional military force are of paramount importance when exploring public support for regional integration. Until now, however, scholarly research has not considered the influence of attitudes towards a regional military mechanism in the sub-Saharan African context. Using Afrobarometer data, we demonstrate that military concerns are vital when exploring Tanzanian attitudes towards the proposed political federation of the East African Community (EAC), the East African Federation (EAF). More specifically, opposition to military cooperation strongly influences Tanzanian scepticism of the EAF. This finding is highly relevant given that referendums in the participating member states must be passed to facilitate political integration. Heightened opposition towards military cooperation raises the possibility of the public rejecting a politically integrated EAC. This poses a potential obstacle to the implementation of joint security policies and crucial mechanisms to provide a more stable region at large. We account for alternative explanations of Tanzanian opinion formation and reflect on the strength of military-orientated concerns for investigating public support for the East African project specifically and regional integration in sub-Saharan Africa more widely.

Facteurs associés à l'intégration stratégique des TIC par le personnel enseignant

Le présent mémoire porte sur l'analyse des facteurs qui incitent le personnel enseignant au primaire et au secondaire à faire une intégration stratégique des technologies de l'information et de la communication (TIC). Lors de nos visites dans les écoles au Québec et au Luxembourg, nous avons remarqué qu'une partie des enseignants et des enseignantes, en faible proportion, réussissent à faire une telle intégration. L'objectif de cette recherche est d'identifier les facteurs qui tendent à avoir une influence sur ce phénomène, de saisir leur rôle et de comprendre comment ils opèrent. Dans une première partie, nous décrivons l'influence des TIC sur la société et analysons en quoi les technologies peuvent constituer un apport substantiel dans le processus de l'apprentissage. Par la suite, nous définissons le rôle du personnel enseignant dans l'intégration des TIC et nous démontrons qu'il y a une grande variabilité sur ce plan chez le personnel enseignant, tant au niveau primaire que secondaire. Quant au cadre théorique, il présente une définition de"l'intégration stratégique des TIC" basée sur les caractéristiques du paradigme de l'apprentissage et des cinq potentialités des TIC dans un contexte éducatif.

Le rapport au travail en collaboration du personnel enseignant d'écoles secondaires du Québec

Cette recherche a pour but de connaitre le rapport au travail en collaboration du personnel enseignant d'écoles secondaires du Québec. Ce rapport comporte deux dimensions, à savoir les représentations dont les dispositions à collaborer et les pratiques de collaboration. La recension des écrits soulève quatre types d'éléments qui sont mis en cause dans le travail en collaboration chez le personnel enseignant : des facteurs de contexte, entre autres, la réforme de l'éducation au Québec (1997-1998), les représentations du personnel enseignant au regard du travail en collaboration, des représentations au regard des pratiques d'enseignement, l'identité professionnelle des enseignantes et enseignants. Sur le plan méthodologique, cette étude s'inscrit dans le paradigme compréhensif, interprétatif. La cueillette des informations, par entrevues semi-structurées, a été réalisée auprès de trente-cinq enseignantes et enseignants issus de trois écoles de tailles différentes en 2006 et en 2007. Les résultats révèlent qu'une forte proportion du personnel interrogé montre des dispositions positives ou plutôt positives à la collaboration. Par ailleurs, un peu plus des trois quarts des participantes et participants ont des pratiques de collaboration très développées ou développées. Quant au rapport à la collaboration, une majorité des participantes et participants présente un rapport positif ou plutôt positif. Les résultats de notre recherche ont permis d'identifier quatre types de collaboratrices et de collaborateurs : la personne solitaire et individualiste, la collaboratrice ou le collaborateur occasionnel, la collaboratrice ou le collaborateur sélectif, la collaboratrice ou le collaborateur engagé. Plusieurs facteurs conditionnent le travail en collaboration et ils se regroupent en quatre catégories : les facteurs personnels, la relation, la production, la dimension organisationnelle et contextuelle. Les résultats de cette recherche contribuent à mieux connaître le rapport au travail en collaboration du personnel enseignant ainsi que ce qui influence la dynamique de collaboration.

L'accompagnement du personnel enseignant au regard de l'enseignement et l'évaluation des attitudes au collégial.

La présente recherche-intervention s'intéresse à l'accompagnement des enseignantes et des enseignants vers l'appropriation de pratiques pédagogiques qui visent l'enseignement et l'évaluation des attitudes. Le développement d'attitudes professionnelles se retrouve parmi les ojectifs de la plupart des programmes techniques au collégial. Parfois, appelées valeur, savoir-être, habiletés de type socioaffectif et dimension affective, un fait demeure, l'enseignement et l'évaluation des attitudes représentent un défi de taille pour les enseignants. C'est dans ce contexte que la conseillère ou le conseiller pédagogique joue son rôle d'accompagnateur. Mais dans quelle mesure l'accompagnement d'enseignantes et d'enseignants du secteur technique pour enseigner et évaluer des attitudes professionnelles peut-il être efficace? Une méthode méthodologie interprétative a été adoptée pour réaliser cette recherche.