Sentences with phrase «calcium concentrations in»

Calcium concentrations in the blood and fluid that surround cells are tightly controlled in order to preserve normal physiological function.

Schulz et al. (1993) found that although ingestion of both types of resistant starch lowered the cecal pH and increased the calcium concentrations in the liquid phase of the cecal contents, only ingestion of the native resistant starch lowered the ileal pH and increased the calcium and magnesium concentrations in the liquid phase of the ileal contents.

The ways that we regulate phosphorus and calcium concentrations in the body are complex, and involve the kidney, the lungs, and a number of hormones.

We observed similar robust increases of intracellular calcium concentrations in response to KCl and ATP in both GFP - expressing (n = 28) and GFP - nonexpressing cells (n = 12), whereas 5 - HT elicited an increase in intracellular calcium only in GFP - expressing cells (KCl: t (40) = 0.98, p = 0.33; ATP t (38) = 1.04, p = 0.30; 5 - HT: t (38) = 5.24, p < 0.0001 Student's t tests; Fig. 4A, B, F).

None of the sites showed a decrease in calcium concentrations in the organic layer, and a few showed an increase.

The reason may be an eggshell - like mineral layer that the virus acquires due to the high calcium concentration in the intestines of birds.

Calcium ions rapidly stream into the presynaptic terminal and the calcium concentration in the presynaptic terminal rises.

Using the robotic microscope system, they found that, when a worm is trying to find out the favorable direction to move away from the odor, the calcium concentration in a nerve cell raises slowly according to the mathematical integration of the amount of decrease in the odor concentration, that is, it adds up for a certain period of time.

As this only happened in specific precise areas and at relatively high levels — it could also be deduced that the elusive sites of calcium concentration in neurons had finally been found.

Simultaneous exposure to ATP and phenylephrine induces a sustained elevation in the intracellular calcium concentration in supraoptic neurons.

The calcium concentration in the blood is tightly regulated, and any excess is stored in bones.

The exact mechanism how dopamine enhances hGH is still being researched, however experts believe that it does so by increasing another hormone called GHRH which acts by increasing intracellular calcium concentration in pituitary cells which secrete growth hormone.

Not exact matches

The higher concentration of calcium, potassium and magnesium in delactosed permeate can enhance the nutritional profile of many foods.

An Indian study also found that cheese with no sugar added can increase the calcium and phosphate concentration in dental plaque, which reduces the likelihood of cavities.

It was later discovered that having a high concentration of calcium in the blood without sufficient levels of vitamin D meant it could not be absorbed.

This allowed them to track changes in calcium ion concentrations in the cells around wounds in living tissue (as opposed to the cell cultures used in many previous wound response studies) and to do so with an unprecedented, millisecond precision.

This increased calcium concentration, in turn, triggers their transformation from a static to a mobile form, allowing them to begin sealing off the wound.

Measurement with the fluorescent calcium indicator fura - 2 indicated that the IgG treatment reduced potassium - stimulated increase in free intracellular calcium concentration.

When elevating calcium ion concentration directly at the presynaptic terminal with the use of caged calcium, cleavage of SNAP - 25 by botulinum toxin A (BoNT / A) produced a strong reduction in the calcium sensitivity for release, whereas cleavage of syntaxin using BoNT / C1 and synaptobrevin using tetanus toxin (TeNT) produced an all - or - nothing block without changing the kinetics of remaining vesicles.

Dorte Haubjerg Søgaard has discovered that these frost flowers hold extremely high concentrations of calcium carbonate, which can have a further significant impact on the potential CO2 uptake in the Arctic.

They measured the concentration of calcium ions in the nerve cells to visualize their activity when a moth was stimulated with an odor.

Bronte Tilbrook at CSIRO in Hobart, Tasmania, Australia, measured the concentration of aragonite — a form of calcium carbonate used by some creatures to build shells — at over 200 locations on the reef.

In these species, the mineralization capacity depends on the concentrations of calcium carbonate (CaCO3) dissolved in the water column, the temperature and pressure of these waterIn these species, the mineralization capacity depends on the concentrations of calcium carbonate (CaCO3) dissolved in the water column, the temperature and pressure of these waterin the water column, the temperature and pressure of these waters.

To maintain the solubility constant, which, however, slightly differs for the phases precipitated in different pH ranges, the solubility concentration of calcium ions is specifically lower at higher concentrations of carbonate (higher pH).

Earth System Threshold Measure Boundary Current Level Preindustrial Climate Change CO2 Concentration 350 ppm 387 ppm 280 ppm Biodiversity Loss Extinction Rate 10 pm > 100 pm * 0.1 - one pm Nitrogen Cycle N2 Tonnage 35 mmt ** 121 mmt 0 Phosphorous Cycle Level in Ocean 11 mmt 8.5 - 9.5 mmt — 1 mmt Ozone Layer O3 Concentration 276 DU # 283 DU 290 DU Ocean Acidification Aragonite ^ ^ Levels 2.75 2.90 3.44 Freshwater Usage Consumption 4,000 km3 ^ 2,600 km3 415 km3 Land Use Change Cropland Conversion 15 km3 11.7 km3 Low Aerosols Soot Concentration TBD TBD TBD Chemical Pollution TBD TBD TBD TBD * pm = per million ** mmt = millions of metric tons #DU = dobson unit ^ km3 = cubic kilometers ^ ^ Aragonite is a form of calcium carbonate.

Neural signals are transmitted within neurons by changing calcium concentrations, so the researchers used this technique to measure the amount of calcium contained within the Purkinje cells in real time.

Having the right concentrations of sodium and calcium ions in cells enables healthy brain communication, heart contraction and many other processes.

«We thought that the conflicting results for sodium channels might be related to difficulties in existing methods to control the calcium concentrations that might affect these channels,» Ben - Johny says.

They found that, as with calcium channels, increasing calcium concentrations caused calmodulin to bind within the resemblance element of sodium channels and prevent their opening, just as in calcium channels.

The nerve cell's activity was measured via concentration of calcium ion in the cell, and the team analyzed the changes in calcium concentration using a mathematical model.

Various mouse lines have been developed to express proteins that can be used to visualize changes in concentrations of calcium, which increase when neurons become active.

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.

The concentration of calcium in cells is a measure of stress, but the injection itself may cause stress and so invalidate the reading.

Either the increased concentration of free calcium ions or their increased mobility (likely both, the researchers speculate) results in a decrease in the electrical resistance throughout the material, which can be detected with a multimeter connected to electrodes embedded in the film.

An array of proteins that are specialized for binding calcium regulate its concentration in the cell and mediate its effects

In one series, excised rat heart muscle tissue was mounted onto a device that directly measured the force of contraction at the same time as intracellular calcium concentration.

Monk notes, however, that other studies have shown that the swishing cilia also influence calcium concentrations, and it is possible that a similar effect is at work in developing mice.

The authors analyzed the relationship between the blood levels of vitamin D and a number of menopause symptoms, including hot flashes, night sweats, sleep disturbance, concentration, and forgetfulness in 530 women who participated in the calcium and vitamin D WHI trial.

They showed that endocrine disruptors — applied at concentrations measured in body fluids — directly open CatSper and, thereby, increase calcium levels in sperm, change their swimming behavior, and trigger the release of digestive enzymes that help sperm to break through the egg coat.

Exposing S. pistillata to seawater with an elevated calcium concentration resulted in up - regulation of gene expression during the day relative to the night.

It is a true multi-talent: Its calcium carbonate platelets carry organic material from the surface to the deep ocean, which regulates carbon dioxide concentrations in the atmosphere.

Four coral fragments of S. pistillata were incubated for 1.5 h in each of the two different calcium concentrations (SW, SW + 100), and for two time points: in the mid-day (11:00) and at night - time (23:00).

This will be achieved by exposing the coral to seawater with high calcium concentrations to induce an alteration in gene expression profiles, identified using a DNA microarray analysis.

During the night, coral fragments treated with high calcium concentrations showed active genes that are involved in the mitochondrial synthesis of ATP and ribosomal metabolism.

In addition, we explored the differential genes expressions between day and night in the presence of high calcium concentration seawater in order to identify the presence of networks of regulatory genes in a basal metazoaIn addition, we explored the differential genes expressions between day and night in the presence of high calcium concentration seawater in order to identify the presence of networks of regulatory genes in a basal metazoain the presence of high calcium concentration seawater in order to identify the presence of networks of regulatory genes in a basal metazoain order to identify the presence of networks of regulatory genes in a basal metazoain a basal metazoan.

In addition, the effect of the high calcium concentration was stronger in the calcification rates during day compared to the night (Fig. 2In addition, the effect of the high calcium concentration was stronger in the calcification rates during day compared to the night (Fig. 2in the calcification rates during day compared to the night (Fig. 2).

Changes in the carbonate ion concentration in seawater can affect the saturation state (and hence biological availability) of several types of calcium carbonate (e.g., calcite, aragonite, or high - magnesian calcite.

Then the team restricted evidence to just three measurements that can be obtained from shell samples in sediment cores: cadmium concentration and carbon and oxygen isotope ratios in the calcium carbonate shells.

As ocean acidification proceeds, carbonate becomes less and less abundant, so at one point the carbonate concentration in the water is limiting the precipitation of calcium carbonate and organisms have a harder time to make their shell and skeleton since one of the bricks needed to make the wall is becoming less and less abundant.

This triggers chemical reactions that reduce not only the pH of that water, but also the concentration of calcium carbonate, a mineral that many sea creatures use in making their shells.