Sentences with phrase «chemical changes affect»

This may explain why identical twins tend to show more differences as they get older and don't spend as much time together — their natural chemical changes affect their development as individuals.

Thus evolution is a theory that is used to explain biological, genetic, and chemical changes affecting organisms of all types.

Not exact matches

Ultrasound machines don't use radiation and cause no known physical or chemical changes that could affect your baby.

Scientists also speculate that natural chemical changes in our genetic material may affect the way certain genes dominate.

Changes in the brain's chemicals can also affect how a person feels.

It's common to have mood swings during pregnancy, partly because of hormonal changes that affect neurotransmitters (chemical messengers in the brain).

During pregnancy, hormone changes can affect brain chemicals and cause depression and anxiety.

Other molecular changes — chemical tags added to DNA or to proteins called histones — may affect health without injuring DNA.

Meanwhile, the new study suggests the effect will intensify in the future with continued climate change, based on computer models that attempt to project how rising temperatures would affect the Arctic's chemical reservoirs.

It notes «[a] ir impacts that could affect respiratory health,» for example, and «[c] limate change impacts due to methane and other volatile organic chemical releases.»

Later in life the genetic material can be changed by epigenetic modifications, i.e. chemical alterations of the DNA the affect the activity of the genes.

A multicenter team of researchers reports that a full genomic analysis of tumor samples from a small number of people who died of pancreatic cancer suggests that chemical changes to DNA that do not affect the DNA sequence itself yet control how it operates confer survival advantages on subsets of pancreatic cancer cells.

They found that both bunch rot and powdery mildew caused nuanced changes in the composition of (chemical) aroma substances, changing the odor of the wines to the point where the wines» aroma quality was significantly affected.

Epigenetic modifications are chemical changes to DNA that affect how genes are regulated.

During development, chromosomes are subject to chemical changes that don't affect the nucleotide sequence but can turn genes on or off; the best known example is methylation, in which a methyl group is attached to specific DNA regions.

Now plant biologists and immunologists at York have joined forces to examine a very closely related family of these small molecules (flavonoids) to establish how tiny changes to their chemical structures affect their bio-activity.

Wherever they gather, mitochondria change the local chemical microenvironment: They cause a lower pH, and that small change, Van Blerkom believes, can affect the local activity of certain enzymes.

Professor Sinclair said: «It is well established that prior to conception and in the early stages of pregnancy during natural or assisted reproduction subtle chemical changes can affect the human genome leading to development and late - onset chronic diseases.

DNA methylation and other epigenetic alterations — chemical changes to DNA that can alter a gene's expression without affecting its protein - coding sequence — may underlie some of the lasting biochemical havoc, Ghanei says.

Researchers showed that the changes imposed by different pathophysiology specifically affect the top of the functional hierarchy, at the level of chemical species.

Curiosity is climbing a layered Martian mountain and finding chemical evidence of how ancient lakes and wet underground environments changed, billions of years ago, in ways that affected their potential favorability for microbial life.

However, small changes in the chemical composition of particles can affect the environment.

The silicate + CO2 - > different silicate + carbonate chemical weathering rate tends to increase with temperature globally, and so is a negative feedback (but is too slow to damp out short term changes)-- but chemical weathering is also affected by vegetation, land area, and terrain (and minerology, though I'm not sure how much that varies among entire mountain ranges or climate zones)-- ie mountanous regions which are in the vicinity of a warm rainy climate are ideal for enhancing chemical weathering (see Appalachians in the Paleozoic, more recently the Himalayas).

«We are interested in understanding how sunlight affects the chemical composition of organic particles,» said Dr. Adam Bateman, who worked on this and other global change studies.

A mesocosm experiment by scientists from GEOMAR Helmholtz Centre for Ocean Research Kiel, Alfred Wegener Institute, Helmholtz Centre for Polar and Marine Research Bremerhaven (AWI) and the Institute for Baltic Sea Research Warnemünde (IOW) reveals for the first time how ocean change might affect the special physical, chemical and biological characteristics of the ocean's uppermost boundary.

«The privileged position of industry to craft language in the trade agreement without public input, and the unlimited potential of TTIP to affect the ability of countries to regulate on toxic chemicals, energy and climate change, food and agriculture and other critical issues.»

This type of cooperative chemical communication, in which a molecule binding at one site influences chemical activity at another site on the enzyme, is driven by structural and bonding changes and affects the function of the biocatalysts.

Long - term use also causes changes in other brain chemical systems and circuits as well, affecting functions that include:

Studies link the latter to mood changes and memory issues; an uptick in inflammatory chemicals can affect your nervous system.

We believethat these microbiome - induced chemical changes may in turn affect behavior, by, for example, alleviating anxiety.

Environmental chemicals, lack of dietary fiber, excess dietary fat, estrogens in cow's milk, lack of plant - derived phytoestrogens, and resulting obesity are some of the means by which diet adversely affects hormones.6 - 10 Most importantly, when a woman changes to a low - fat, plant - food based diet her reproductive hormones correct and most troublesome female problems, like heavy menstrual bleeding, fibrocystic breast disease, and PMS are alleviated.

Many people have no clue that changes in hormone production are affecting them in multiple ways, and that balancing these delicate chemical levels can improve a wide array of problems, including libido and sexual performance.

Genetic changes that affect the body's ability to process food preservatives (and other environmental chemicals) have also shown to play a role.

To avoid these negative epigenetic changes that may affect not only your health but also that of your children and grandchildren, it is important to make lifestyle changes to reduce your chemical exposure.

If the trachea is affected by cigarette smoke, chemical irritants or dust, the owner will be asked to change the dog's living environment.

CDS is believed to be caused by physiological and chemical changes in the brain of aging dogs that affect brain function.

Just as the miner's canary alerted mine workers to poison gases in a shaft, natural areas can alert us to biological, chemical, and environmental changes that will affect our quality of life and the survival of species.

When changing the players, the users can flick the Right Stick to the right so as to view how the swapping will affect the chemical composition of the other stakeholders.

The temporal effect of chemical, biological and physical forces applied to his work affect the original materials and change their form to produce a feeling of atmosphere and endlessness, while beauty and sensual value take on significantly different properties.

Chemical processes that may affect CO2 uptake include changes to the CO2 buffering capacity (Sarmiento et al 1995) and the effects of temperature on CO2 solubility.

The upper atmosphere is generally cooling and contracting, and related changes in chemical composition are affecting the ionosphere.

One theory of many behind the solar / volcanic connection is that MUONS, a by product of galactic cosmic rays can affect the calderas of certain volcanoes by changing the chemical composition of the matter within the silica rich magma creating aerosols which increase pressure in the magma chamber and hence lead to an explosive eruption.

So Monckton and Salby have discovered that real, long - term, natural, climate changes will affect our atmosphere's chemical composition.

These include solar - related chemical - based UV irradiance - related variations in stratospheric temperatures and galactic cosmic ray - related changes in cloud cover and surface temperatures, as well as ocean oscillations, such as the Pacific Decadal Oscillation and the North Atlantic Oscillation that significant affect the climate.

Changes in ozone depletion may also affect climate change, and many of the chemicals involved in ozone depletion and their substitutes also can influence climate.

Jim, the bottom line for me is that for the earth to be in radiative thermal equiibrium with the sun, it has not been demonstrated that any change in chemical composition of the earth or atmosphere is able to affect the equilibrium temperature, providing this does not change albedo.

Here we examine the hypothesis4 that CO2 variations arose from changes in ocean circulation that affected the distribution of chemical properties and thus of P CO 2 in the surface waters of the world ocean.

Changes in global weather patterns (e.g. El Nino events or global warming) can alter breeding behavior, affect reproductive success, decrease immune functions and increase amphibian sensitivity to chemical contaminants.

The collaborative international project began in 1993 as an effort to address how Amazonia functions as a regional entity within the larger Earth system, and how changes in land use there might affect the region's biological, chemical, and physical functions and influence global climate.

As a smaller fraction of the excess CO2 goes into the oceans, a larger fraction may remain in the atmosphere, and the chemical changes in seawater that can affect organisms will continue to grow in lockstep with the relentless increases in the excess CO2 in the overlying atmosphere caused by human activities.