Sentences with phrase «ph changes»

Given the parameters you mention above, I can't help thinking that you might be on to something important here, i.e. with respect to changes due to dissolved CO2 and the attendant, albeit small pH changes.

«'' On both a monthly and annual scale, even the most stable open ocean sites see pH changes many times larger than the annual rate of acidification,» say the authors of the study, adding that because good instruments to measure ocean pH have only recently been deployed, «this variation has been under - appreciated.»

Approaching 400 ppmv, there's plentiful indication of stresses from ocean pH changes and climate shifts that point toward future extinctions, especially of species already at risk due other factors.

Another recent study, by scientists from the U.K., Hawaii and Massachusetts, concluded that «marine and freshwater assemblages have always experienced variable pH conditions,» and that «in many freshwater lakes, pH changes that are orders of magnitude greater than those projected for the 22nd - century oceans can occur over periods of hours.

Not only that, life is abundant where the pH changes by a quarter of a unit in a week.

The fact is pH changes rapidly with depth and there would be considerable uncertainty depending how a 200 meter average was derived.

But how do you know what the future pH changes will be?

As such, ocean acidification could represent an abrupt climate impact when thresholds are crossed below which organisms lose the ability to create their shells by calcification, or pH changes affect survival rates (see the Extinctions section below for more discussion of these issues).

When you speak of other constituents being used to calculate pH changes, you again remind us of the complexity and chaos of the chemistry of our oceans.

[52] In fact, some places have daily pH changes well in excess of those projected from rising CO2 levels.

The individual molecular residence time is on the order of 5 years, where pH changes occur — but we have to ask what rates apply to CO2 entering or leaving the carbon cycle.

We've seen a change in ocean pH already, and further pH changes will reduce the amount of CO2 that the oceans can hold.

Thus for pH changes, the total C is important and not the isotopic abundances.

While scientific models can tell us what is going to happen as the earth warms, climate change will also be influenced by small so far neglected fluctuations in chemistry such as these pH changes in our oceans, affecting billions of creatures, and of course, us.

Thus major changes in remaining buffering capacity may occur while pH changes very little.

Repeat hydrography has been used to document a decadal increase in the inventory of DIC in the Pacific (8); however, the technique has not yet been applied to the detection of pH changes.

We show here that weak bases bypass the Na — H ion exchange, cause both the internal and external pH changes directly by their passive diffusion into the egg, and that the initial increase in the rate of protein synthesis is proportional to the amount of weak base entering the egg.

This led to the suggestion that the pH changes induced by weak bases were mediated by a mechanism similar to the Na — H ion exchange.

Are you saying that if the pH changes fro 8.5 to 7.5, the result is 10 times more acidic?

This process tends to buffer the chemistry of the seawater so that pH changes are lessened» and «Essentially this is an area of great uncertainty.

This process tends to buffer the chemistry of the seawater so that pH changes are lessened (see section 2.2.3 and Annex 1 for a more detailed review).»

The problem is that intense ketone production leads to metabolic pH changes leading to acidic blood and dangerous electrolyte imbalances.

The pH changes create an environment in the bladder that is favorable for bacteria to «set up shop» and create an infection.

I'd like to think it creates bacteriocins (its own natural antibiotics) and pH changes that can then allow Bifido to properly reproduce and thrive as indicated.

These pH changes can eat away at collagen.

Fluorescent probes can be used to detect different parameters such as: cell cycle, proliferation, apoptosis, pH changes and calcium flux.

The MedSeA project quantifies the rate of pH decrease in the Mediterranean water masses and ultimately provide maps to identify sectors of the Mediterranean Sea that are currently most affected by pH changes.

Selective labeling and monitoring pH changes of lysosomes in living cells with fluorogenic pH sensors.

Daily medium exchanges help alleviate cellular stresses associated with pH changes and resource consumption due to the high cell density of the culture.

Four years ago, during a magnetic resonance experiment with tumor cells, TUM physicist Dr. Franz Schilling found signals from a molecule that was highly sensitive towards pH changes.

He says: «It was not realised before that the blood pH changes we see in patients with kidney disease can have an impact on their ability to monitor blood calcium levels.

«The tolerance of herring larvae to pH changes could be due to their life history strategy.

«But because this sets the stage for looking at more subtle biological effects [from smaller pH changes], this is incredibly important work.»

Many cells in the BLA possess acid - sensing ion channels called ASIC1a, which respond to pH changes in the environment outside of the cell.

But what has remained unknown is just how soil pH changes between wet and dry climates.

«Soil fertility: Global map of soil pH: How soil pH changes between wet and dry climates.»

Marcia Pires, polymer science researcher, Braskem, said intelligent packaging uses specific indicators such as pH changes to demonstrate the state of conservation of its contents, emitting an external alert.

The sensor's technical goals are threefold: to operate at depths of at least 3,000 meters, take measurements that are precise to the level of the annual pH change (roughly 0.002 on an acid - to - base scale that stretches from 0 to 14) and avoid the need for frequent recalibration.

«This «responsive porous host» approach is expected to be applicable to different stimuli, such as photo - irradiation, heat application and pH change, and open the path for devising a generic strategy for the development of stimuli - responsive materials in a controllable and predictable fashion,» said Dr. Hirotoshi Sakamoto, a group leader of the JST - ERATO project.

Multiple incorporations cause linear increases in the pH change, so homopolymers should be less of a problem than 454.

One group of scientists was curious about why ocean pH changed as it had during those 60,000 years.

Therefore, there is, as yet, no robust evidence for realized severe disruptions of marine socioecological links from ocean acidification to anthropogenic CO2, and there are significant uncertainties regarding the level of pH change that would prompt such impacts.

I'd just like to add: Though I'm very curious myself about the burgeoning scientific understandings of gut flora, you may want to consider pointing out factors having to do with pH change.

The pH change in the mouth allows bacteria to live below the gingival surface where the bacteria causes infection, damage to teeth, and to other underlying structures.

The ocean pH change will persist for thousands of years.

So it is very reasonable to assume that the contribution of human - produced CO2 levels to the ph change today in upwelled waters is thus (45 / 120) *.1 or.0375.

I know it's been suggested as the connection between CO2 and local areas where various organisms are showing effects of pH change.

A pH over 7 is alkaline, thus a pH change from 8.25 to 8.14 is less alkaline (and indeed more towards the acid side, but not directly «more acidic»).

Although (1) the effects of a pH change have been demonstrated in the lab, and (2) it's a longer - term change than ozone depletion, which fixes itself on a time scale of decades after freon emission is stopped.

Tatoosh Island pH change is 10 times worse than modelled — upwelling is a major influence on pH in that part of the world.