Research on density

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Research on density

Defining Powerhouse Fruits and Vegetables: A Nutrient Density Approach. Prev Chronic Dis ; Of 47 foods studied, 41 satisfied the powerhouse criterion and were more nutrient-dense than were non-PFV, providing preliminary evidence of the validity of the classification scheme.

The proposed classification scheme is offered as a tool for nutrition education and dietary guidance. Defining PFV on the basis of nutrient and phytochemical constituents is suggested 1. However, uniform data on food phytochemicals and corresponding intake recommendations are lacking 2.

This article describes a classification scheme defining PFV on the basis of 17 nutrients of public health Research on density per the Food and Agriculture Organization of the United Nations and Institute of Medicine ie, potassium, fiber, protein, calcium, iron, thiamin, riboflavin, niacin, folate, zinc, and vitamins A, B6, B12, C, D, E, and K 3.

Berry fruits and allium vegetables were added in light of their associations with reduced risks for cardiovascular and neurodegenerative diseases and some cancers 8. For each, and for 4 items apples, bananas, corn, and potatoes described elsewhere as low-nutrient-dense 1information was collected in February on amounts of the 17 nutrients and kilocalories per g of food 9.

Because preparation methods can alter the nutrient content of foods 2nutrient data were for the items in raw form. Second, a nutrient density score was calculated for each food using the method of Darmon et al The scores were weighted using available data Table 1 based on the bioavailability of the nutrients As some foods are excellent sources of a particular nutrient but contain few other nutrients, percent DVs were capped at so that any one nutrient would not contribute unduly to the total score 3.

The denominator is the energy density of the food kilocalories per g: The score represents the mean of percent DVs per kcal of food.

Because there are no standards defining good sources of a combination of nutrients-per-kilocalories, the FDA threshold was used for this purpose. The 4 low-nutrient-dense items were classified as non-PFV.

To validate the classification scheme, the Spearman correlation between nutrient density scores and powerhouse group was examined. The robustness of the scheme with respect to nutrients beneficial in chronic disease risk also was examined by comparing foods classified as PFV with those separately classified as such based on densities of 8 nutrients protective against cancer and heart disease ie, fiber, folate, zinc, and vitamins B6, B12, C, D, and E 2,4.

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Top of Page Results Of 47 foods studied, all but 6 raspberry, tangerine, cranberry, garlic, onion, and blueberry satisfied the powerhouse criterion Table 2. Nutrient density scores ranged from Top of Page Discussion The proposed classification scheme is offered in response to the call to better define PFV and may aid in strengthening the powerhouse message to the public.

Messages might specify PFV to help consumers know what they are and choose them as part of their overall fruit and vegetable intake. As numeric descriptors of the amount of beneficial nutrients PFV contain relative to the energy they provide, the scores can serve as a platform for educating people on the concept of nutrient density.

Expressing the nutrient desirability of foods in terms of the energy they provide may help focus consumers on their daily energy needs and getting the most nutrients from their foods. The rankings provide clarity on the nutrient quality of the different foods and may aid in the selection of more nutrient-dense items within the powerhouse group.

Mixture Density Networks - Microsoft Research

Foods within particular groups were studied; thus, other nutrient-dense items may have been overlooked. Because it was not possible to include phytochemical data in the calculation of nutrient density scores, the scores do not reflect all of the constituents that may confer health benefits.

Warranting study is the utility of approaches defining PFV based on the presence regardless of amount of nutrients and phytochemicals. Although nutrient density differences by powerhouse group were examined, a true validation of the classification scheme is needed.

Research on density

Future studies might identify healthful diets and examine correlations with PFV or look for correlations between intake of PFV and health outcomes 3.This report studies the global High Density Expansion Enclosure market status and forecast, categorizes the global High Density Expansion Enclosure market size (value & volume) by manufacturers, type, application, and region.

Research on High-Energy Density and High Power Density Electrochemical Energy Storage Devices High-power density lithium-ion (Li-ion) batteries and electrochemical capacitors with high energy density are increasingly needed in applications such as power tools, robotics, unmanned aerial vehicles (UAV), and hybrid electric vehicles (HEV).

Research vineyard update on planting density and pruning impacts on potential yield. Update on an applied research project on northwest Michigan Riesling grapevines investigating the impacts of planting density and pruning on potential yield.

Weakening of the bones due to the progressive loss of bone mass is a potentially serious side-effect of extended spaceflight. Studies of cosmonauts and astronauts who spent many months on space station Mir revealed that space travelers can lose (on average) 1 to 2 percent of bone mass each month.

Through research, conferences, teaching and projects, the centre aims to shape new thinking and practice on how to make cities fairer and more sustainable for the next generation of urban dwellers, who will make up some 70 per cent of the global population by research focused on the: design, management, and quality of life in high-density developments.

Density project 3: Affordability, development costs and viability – Explored the relationship between increasing.

Research on density
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