Monthly Archives: April 2009

gastric emptying and fat

The physical state and the spatial distribution of fat within the gastric lumen during digestion are critical factors influencing the rate of fat delivery to the small intestine. This will affect the rate of fat absorption and metabolism and the signalling between the gut and brain. Fat digestion commences in the mouth with the secretion…

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body composition and skin fold measurements.

This is an important paper relating to central topic in nutrition, body composition equations.Generalised skinfold equations developed in the 1970s are commonly used to estimate laboratory-measured percentage fat (BF%). The equations were developed on predominately white individuals using Siri’s two-component percentage fat equation (BF%-GEN). Jackson and colleagues have cross-validated the Jackson-Pollock (JP) generalised equations with…

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Resting energy expenditure and fat mass

Inter-individual variance in resting energy expenditure (REE) is important in interpreting (i.e. normalizing) or even predicting metabolic rate. Fat-free mass (FFM) explains 70-80 % of variance in REE. FFM is regarded as the metabolically active, oxygen-consuming body cell mass. By contrast, fat mass (FM) is the metabolically inert lipid compartment of the body. FM (in…

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osteoporosis and vitamin D status

An adequate vitamin D status is of major importance for bone health. And is dependent on adequate vitamin D intake and sun exposure. Fish is the only natural important dietary sources of vitamin D. Milk, some milk products and cereals are supplemented to different degrees depending on the country, with a much higher degree of…

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neonatal vitamin A supplementation

Vitamin A supplementation in children aged 1-4 is an important intervention for improving health and mortality rates in developing countries. Improvements of 20-30% have been observed. Gogia and Sachdev have looked at the value of supplementation in reports on babies aged less than 1 month. There was no benefit from such interventionGogia and Sachdev 2009…

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medium chain acylcoenzyme A dehydrogenase deficiency

Newborn screening in England and Northem Ireland includes screening for medium chain acylcoenzyme A dehydrogenase (MCAD) deficiency within the entire newborn population. M CAD deficiency is the most common inherited disorder of mitochondrial fatty acid oxidation in people from northern Europe. This autosomal recessive metabolic disease affects about one in 10000 people in the United…

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light diet and obstetric labour

A strength of the double blind trial in clinical work is to challenge old postures in care and give clear and safe guidelines.Such a trial was to determine whether or not a light diet affects women’s ability to deliver normally and safely. Every Maternity suite throughout the world has its own policy.Such a trial is…

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Hot tea and cancer of the oesophagus

Tea has been promoted as a health engendering drink, and no doubt it is. However a very important paper from Iran and a supporting Editorial in the BMJ of 11th April 2009 indicate that tea drunk at temperatures over 75° C results in an enhanced risk of cancer of the oesophagus. Mrs Beeton suggested, (did…

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Carbon dioxide and plants

Trees and plants are growing faster and bigger in response to the large amounts of carbon dioxide being excreted into the atmosphere as a result of the carbon fuels being burnt. This increase is right across the range of plants, rain forests to British sugar beet. However this utilisation is only a fraction of the…

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drugs and sport

Any one interested in sport and Sport’s nutrition will be aware of. The UK national anti-doping agency UK Sport has published its figures for the period 2004 to 2008 f the problem of drugs to enhance performance. There are interesting sports e.g. snooker where doping is commoner than in many other sports. Number of positive…

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