Weinberg-Salam model at finite temperature and density

We present a new gauge fixing condition for the Weinberg-Salam electro-weak theory at finite temperature and density. After spontaneous symmetry breaking occurs, every unphysical term in the Lagrangian is eliminated with our gauge fixing condition. A new and simple Lagrangian can be obtained where we can identify the propagators and vertices. Some consequences are discussed, as the new gauge dependent masses of the gauge fields and the new Faddeev-Popov Lagrangian. After obtaining the quadratic terms, we calculate exactly the 1-loop effective potential identifying the contribution of every particular field.Comment: 4 pages, no figures. New references added. Typo correcte

A modelling approach to investigate the impact of consumption of three different beef compositions on human dietary fat intakes

Objective: To apply a dietary modelling approach to investigate the impact of substituting beef intakes with three types of alternative fatty acid (FA) composition of beef on population dietary fat intakes. Design: Cross-sectional, national food consumption survey – the National Adult Nutrition Survey (NANS). The fat content of the beef-containing food codes (n 52) and recipes (n 99) were updated with FA composition data from beef from animals receiving one of three ruminant dietary interventions: grass-fed (GRASS), grass finished on grass silage and concentrates (GSC) or concentrate-fed (CONC). Mean daily fat intakes, adherence to dietary guidelines and the impact of altering beef FA composition on dietary fat sources were characterised. Setting: Ireland. Participants: Beef consumers (n 1044) aged 18–90 years. Results: Grass-based feeding practices improved dietary intakes of a number of individual FA, wherein myristic acid (C14 : 0) and palmitic acid (C16 : 0) were decreased, with an increase in conjugated linoleic acid (C18 : 2c9,t11) and trans-vaccenic acid (C18 : 1t11; P < 0·05). Improved adherence with dietary recommendations for total fat (98·5 %), SFA (57·4 %) and PUFA (98·8 %) was observed in the grass-fed beef scenario (P < 0·001). Trans-fat intakes were increased significantly in the grass-fed beef scenario (P < 0·001). Conclusions: To the best of our knowledge, the present study is the first to characterise the impact of grass-fed beef consumption at population level. The study suggests that habitual consumption of grass-fed beef may have potential as a public health strategy to improve dietary fat quality

The Impact of Wealth Status on Food Intake Patterns in Filipino School-Aged Children and Adolescents

Socio-economic status (SES) has an impact on food consumption in developing countries. However, the impact of SES on dietary patterns in Filipino school-aged children is currently unknown. The aim of this study was to fill this knowledge gap, using data from the 2013 National Nutrition Survey. Dietary intake of 11,691 children (6&ndash;18 years) were assessed using a 24-h recall. All food and beverages were assigned to one of 85 food groups. Mean daily intake, percent consuming (prevalence), and contribution to energy intake were determined, and stratified by SES, in 6&ndash;9 years old, 10&ndash;12 years old, and 13&ndash;18 years old. Rice was the most consumed food and the primary source of energy across all three age groups, independent of SES. Children of poor SES presented greater consumption of fish, vegetables, fruit, and table sugar (p &lt; 0.05). In comparison, children of rich and middle SES presented greater consumption of milk, chicken, pork, sausages, and soft-drinks (p &lt; 0.05). In conclusion, SES impacts the type of foods consumed by Filipino children, with children in the poorest households being most at risk of consuming low-variety diets. This analysis could be used to support public health strategies to improve dietary diversity, and potentially nutrient intake, in Filipino children