Sentences with phrase «metal concentrations»

Because toxic chemicals and heavy metal concentrations in fish are unpredictable, I limit fish - containing meals to two days per week.

They recommend keeping the initial metal concentration in these products low to help reduce their environmental impact while still maintaining their ability to fight off microbes.

And after washing, the shirts still retained their antimicrobial effect even if their remaining metal concentration was low.

Can be mixed with urine or saliva to give an indicator of heavy metal concentration within the body.

That's why it is critical to know your specific heavy metal concentration and to use this information for developing a balanced detox regimen.

Based on the findings, current and future new types of catalytic converters can be improved and their economic efficiency can be increased, as the noble metal concentration can be reduced by up to 50 %.

Specifically, coniferous soils had 30 percent to 50 percent less calcium, potassium, magnesium, manganese and zinc than deciduous stands, while metal concentrations also were smaller in coniferous needles than deciduous leaves.

Immediately after each takeoff, metal concentrations spiked in the waters around the launch pads.

The study revealed that MSCs isolated from the bone marrow of patients with elevated bone marrow metal concentrations had lost the ability to differentiate into bone - forming osteoblasts.

Her work includes analysis of pond sediments, soils, and more collecting to document plant diversity... We're also hoping to cast a broader net across Providence with an analysis of historical specimens of Plantago [plantain] in an attempt to match terrestrial trends in heavy metal concentration with measurements taken from nearby marine sediments in Narragansett Bay [south of Providence].»

This is one of the first studies, however, to demonstrate the efficacy of using herbarium specimens of herbaceous plants to track changes in heavy metal concentrations over time.

Using herbaceous plant specimens from Brown University's herbarium collected from 1846 to 1916, Dr. Tim Whitfeld, senior author of the study, and his colleagues extracted and quantified heavy metal concentrations including copper, lead, and zinc.

According to Whitfeld, «Sofia is building on this project with a more detailed analysis of heavy metal concentrations at one of our study sites.

Tissue samples from 286 autopsied brains were taken to measure brain metal concentrations.

When an FDA laboratory determines metal concentration they use either and ICP / AES or an ICP / MS whose readings will match very closely the values that are indicated on the lab analysis pages.

They're advised to test soil regularly for heavy metals and to adjust fertilizer combinations and relative nitrogen, phosphorous, and potassium levels in the soil when metal concentrations rise.

The question of how to monitor that responsibility, however, is complicated by the fact that there are as yet no federal limits on heavy - metal concentrations applicable to all fertilizers.

Volumes (800 ml) were added to triplicate polycarbonate bottles and spiked with an f / 50 nutrient derivative (10 µm NaNO3 −, 0.8 µm NaH2PO43 −, 10 µm Na2SiO3 and f / 50 vitamin and trace metal concentrations [27,28]-RRB- to promote diatom growth.

Those veterans will be reanalyzed every five years for high metal concentrations and corresponding health issues, says clinical toxicologist Melissa McDiarmid of the Baltimore Veterans Affairs Medical Center.

She is testing the limits of survivability of some archaea under different conditions of acidity, pressure, temperature, and metal concentration in order to determine the range of environmental conditions in which these organisms could be found.

Rice used for protein manufacturing is carefully scrutinized and tested at the lowest levels tests will allow because when the concentrated protein is fractioned out, the naturally occurring heavy metal concentration can also increase.

The metal concentrations, usually in the millimolar (mM) amount, need to be low in order to prevent aggregation of the nanoparticles into larger clusters that could significantly limit the amount of material that can be prepared at any one time.

In addition to the study's goal of demonstrating the usefulness of herbarium specimens to measure levels of heavy metal concentrations, the study had a second, equally important goal.

The metal concentration in parts - per - million (ppm) expresses the weight of the metal vs. the weight of the liquid it is suspended in.

Incidents of flamingo mortality, perhaps attributable to algal toxins or heavy metal concentrations, are puzzling and a cause of concern.

As a starting point, we explore what the traces of the Anthropocene will be in millions of years — carbon isotope changes, global warming, increased sedimentation, spikes in heavy metal concentrations, plastics and more — and then look at previous examples of similar events in the geological record.

The forced movement of the super high - pressure liquid CH4 from the liquid core and drop out of the organic metals at specific pressures explains why there is heavy metal concentration in the crust of in some cases a million times more than the mantel.

Beyond the comparative impact of organic vs. conventional systems on the soil's heavy - metal concentration, there's the question of how easily these trace elements enter crops.