Sentences with phrase «ph value of the water»

Only in our laboratories do we have the opportunity to examine how the fish and the zooplankton react to a drop in the pH value of the water», says the biologist.

Not exact matches

They next determined that the protonema cells absorbed lead well at pH values between 3 and 9, which is important because the acidity of metal - polluted water can vary.

With our new method you can also measure the acidity, that is to say, we measure the pH value and this is seen when the water changes colour after the addition of a pH dye.

And at least one group of Chinese soils is approaching the pH values at which aluminum and manganese start leaching into surface water, with potentially toxic results.

Our model result also showed that the maximum Revelle factors (Δ [CO2] / [CO2]-RRB- / (Δ [DIC] / [DIC]-RRB- among varied pH values (6 — 9) and DIC concentrations (0.5 — 3.5 mmol kg − 1) were between pH 8.3 and 8.5 in fresh water and were between 7.3 and 7.5 in waters with a salinity of 35, reflecting the changing efficiency of dissolving CO2 gas into the DIC solution and the varying stability of this desired DIC solution.

In a laboratory experiment at the Alfred Wegener Institute, ephyra larvae of moon jellies developed perfectly at elevated water temperatures, lower pH values and reduced oxygen concentrations.

Any value below 7 falls in the category of acidic waters, while the water with pH value above 7 is considered as alkaline.

Witch hazel grows best in acidic (pH value of 6 or less), rich, and moist soils and requires regular watering.

For example, raised pollutant levels (i.e. ammonia, nitrite and nitrate) and sudden changes (or unsuitable values) of water pH and hardness can have adverse effects on fish.

The pH system is a logarithmic scale which means that the molar concentration of H +, protons or [H +], in the water is converted to its log value and given a negative sign, pH = - log [H +].

Oceans mop up carbon dioxide from the atmosphere, lowering the water's pH value - an effect that may be exacerbated by burning of fossil fuels.

Human emissions of CO2 lead to higher concentrations in sea water and thus lower its pH value.

if the carbon dioxide content of the air were to increase sevenfold, the acidity (pH) of sea water would not rise more than.5 above its present value».

Based on the ocean acidification fears, Yu et al. conducted research on sea urchin babies larvae immersed in water with lower values of pH to determine its impact on larvae growth and well being.