Popular diets across the world typically focus on the right balance of essential components like protein, fat, and carbohydrates.
These items are called macronutrients, and we consume them in relatively large quantities. However, micronutrients often receive less attention. Micronutrients are chemicals, including vitamins and minerals, that our bodies require in very small quantities. Common mineral micronutrients include zinc, iron, manganese, magnesium, potassium, copper, and selenium.
Tom Warkentin, University of Saskatchewan
A new variety of pea, CDC Saffron. Peas contain micronutrients essential for good nutrition.
A recent study published in Crop Science examined the mineral micronutrient content of crops grown in the province of Saskatchewan, Canada. The study was conducted jointly by the University of Saskatchewan and North Dakota State University. The researchers examined four types of grain legumes (pulses)—field peas, lentils, chickpeas, and common bean.
Although these legumes have up to twice the micronutrients as cereals, according to Tom Warkentin, professor of plant breeding at the University of Saskatchewan, they are not cultivated on the same scale as cereals in most countries. Therefore, grain legume crops are often overlooked as potentially valuable sources of micronutrients.
Diets that do not provide adequate amounts of micronutrients lead to a variety of diseases that affect most parts of the human body. Warkentin says, “Iron deficiency is the most common, followed by zinc, carotenoids, and folate.”
The study found that genetic characteristics (genotype) as well as environmental conditions—such as soil properties and local climate—can affect the micronutrient content of grain legumes. The researchers measured micronutrient levels by a technique known as atomic absorption spectrometry. According to Warkentin, “In the case of selenium, we found that environmental conditions are more important than genotype.”
Warkentin notes, “A 100-gram (3 ½-ounce) serving of any one of the four grain legume crops studied provided a substantial portion of the recommended daily allowance (RDA) of iron, zinc, selenium, magnesium, manganese, copper, and nickel.” The serving size was based on the dry weight of the grain legumes. He adds that lentils were the best source of iron, while chickpeas and common bean were higher in magnesium. Calcium was the only key micronutrient that these crops lacked.
Interestingly, most of the crops studied were high in selenium, with chickpeas and lentils being the best sources. Selenium is an important but often overlooked micronutrient. Selenium deficiency can lead to diseases that weaken heart muscles and cause breakdown of cartilage. It can also give rise to hypothyroidism, since selenium is a required chemical in the production of thyroid hormone.
Warkentin concludes, “Increased production and consumption of grain legume crops should be encouraged by agriculturalists and dietitians around the world.” Since grain legume crops don’t require nitrogen-based fertilizers, which are derived from fossil fuels, they are very sustainable. Warkentin also says, “Grain legume crops are highly nutritious. In addition to the micronutrients described in this research, they also contain 20-25% protein, 45-50% slowly digestible starch, soluble and insoluble fiber, and are low in fat.”
Access the full article here:
Susan Fisk | newswise
A human respiratory tissue model to assess the toxicity of inhaled chemicals and pollutants
26.03.2015 | R&D at British American Tobacco
Sci-Fly study explores how lifeforms know to be the right size
26.03.2015 | Cincinnati Children's Hospital Medical Center
In an experiment at the Department of Energy's SLAC National Accelerator Laboratory, scientists precisely measured the temperature and structure of aluminum as...
The IPH presents a solution at HANNOVER MESSE 2015 to make ship traffic more reliable while decreasing the maintenance costs at the same time. In cooperation with project partners, the research institute from Hannover, Germany, has developed a sensor system which continuously monitors the condition of the marine gearbox, thus preventing breakdowns. Special feature: the monitoring system works wirelessly and energy-autonomously. The required electrical power is generated where it is needed – directly at the sensor.
As well as cars need to be certified regularly (in Germany by the TÜV – Technical Inspection Association), ships need to be inspected – if the powertrain stops...
When an earthquake hits, the faster first responders can get to an impacted area, the more likely infrastructure--and lives--can be saved.
The Atlantic overturning is one of Earth’s most important heat transport systems, pumping warm water northwards and cold water southwards. Also known as the Gulf Stream system, it is responsible for the mild climate in northwestern Europe.
Scientists now found evidence for a slowdown of the overturning – multiple lines of observation suggest that in recent decades, the current system has been...
Because they are regularly subjected to heavy vehicle traffic, emissions, moisture and salt, above- and underground parking garages, as well as bridges, frequently experience large areas of corrosion. Most inspection systems to date have only been capable of inspecting smaller surface areas.
From April 13 to April 17 at the Hannover Messe (hall 2, exhibit booth C16), engineers from the Fraunhofer Institute for Nondestructive Testing IZFP will be...
25.03.2015 | Event News
19.03.2015 | Event News
17.03.2015 | Event News
26.03.2015 | Trade Fair News
26.03.2015 | Trade Fair News
26.03.2015 | Life Sciences