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Three portion of extracts were collected, dewatered over anhydrous Na2SO4, filtered though filter paper, and evaporated at 40°C under vacuum on a rotary vacuum evaporator.
The amount of each food item that was eaten is measured by using nine non-overlapping intake frequencies (ranging from "rarely eaten" to "eaten more than three times per day") together with three portion sizes (small, average, and large) [ 35].
During the interview, the respondent referred to accompanying photographs to select from eight food frequency categories (ranging from "never or hardly ever" to "two or more times a day") and three portion sizes.
This questionnaire has been validated previously and includes 113 food items with nine non-overlapping intake frequencies over the preceding year (ranging from "rarely eaten" to "eaten more than 3 times per day") and three portion sizes (small, average, or large) [ 27].
To assess alcohol intake during the past year, the FFQ queried consumption of beer during the summer, beer during the rest of the year, liquor or mixed drinks, or wine or wine coolers during the entire year with 10 categories of frequency, ranging from 'never' to '⩾6 times per day', and three portion sizes (<1, 1 2, >2 drinks).
Similar(55)
2 Divide the pastry into three portions.
Most tables order at least three portions at a time".
Or pay an extra 54p and upgrade to three portions.
Recommended amounts for pregnant women were two portions of fish a week and three portions of dairy products a day.
As a guide, two portions of fish a week and three portions of dairy products a day should be sufficient.
Most of us struggle to eat three portions a day, let alone seven or eight.
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