Sentences with phrase «chemical alterations»

Dog foods that are labelled «natural» mean that all ingredients are in their natural forms and have not undergone scary chemical alterations.

This condition is thought to be caused by chemical alterations in the nervous system that can occur during old age.

According to FDA guidelines, the «natural» label indicates that the food ingredients of the product haven't undergone any chemical alterations.

None of the modified genes has a direct link to cancer, however, making it unclear whether these chemical alterations increase the risk of developing the disease.

Soil layers are identified by coloration and tested for physical and chemical alterations linked to human activity.

Late in life the human brain suffers attrition of certain neurons and undergoes chemical alterations.

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.

The qualities that set this protein powder apart from others is that it gives us the essential and non essential amino acids — omegas, plus vitamins and minerals in one natural product with no high temperature processing and preservatives or chemical alteration of the food.

In addition, researchers replicated the conditions under which the fossils formed to identify the chemical alteration of melanin, subjecting modern feathers to high temperatures and pressures to better understand how chemical signatures changed during millions of years of burial.

Lead author of the study Dr Tom Gernon, Lecturer in Earth Science at the University of Southampton, said: «When volcanic material is deposited in the oceans it undergoes very rapid and profound chemical alteration that impacts the biogeochemistry of the oceans.

Alternatively, prior results might have ignored possible chemical alteration occurring in the comet's tenuous atmosphere.

The first mechanism involves chemical alteration driven by the types of minerals present and by the diverse and abundant microbial community, which both stabilizes and releases carbon.

However, this chemical alteration creates a «monster» which causes cancer and heart disease.

On the other hand, any chemical alteration of a human hormone creates a monster hormone, which is not bioidentical.

It's formulated with quinoa husk extract that's sourced without chemical alteration and with minimal environmental impact in Bolivia to help release dull surface skin.

According to AAFCO, the term «natural» requires a pet food to consist only of natural ingredients, without chemical alteration.

The second study, published April 25, 2018, in Environmental Science & Technology Letters, shows that chemical alteration of oil by sunlight significantly lowers the performance of chemical dispersants, a response tool that helps break up oil into droplets and lessen the amount of oil that reaches coastal ecosystems.

Not exact matches

Marbles in metamorphic aureoles and iron - rich skarns appear to be favored sites for gold mineralization in these deposits, perhaps due to the rheological character, permeability after fracturing, and chemical reactivity of those rocks to alteration by hydrothermal fluids.

That is, if enough different chemical changes are going on, sooner or later some collection of chemicals must undergo a series of alterations that generates a set of conditions much like the original situation.

Physical punishment is associated with a range of mental health problems in children, youth and adults, including depression, unhappiness, anxiety, feelings of hopelessness, use of drugs and alcohol, and general psychological maladjustment.26 — 29 These relationships may be mediated by disruptions in parent — child attachment resulting from pain inflicted by a caregiver, 30,31 by increased levels of cortisol32 or by chemical disruption of the brain's mechanism for regulating stress.33 Researchers are also finding that physical punishment is linked to slower cognitive development and adversely affects academic achievement.34 These findings come from large longitudinal studies that control for a wide range of potential confounders.35 Intriguing results are now emerging from neuroimaging studies, which suggest that physical punishment may reduce the volume of the brain's grey matter in areas associated with performance on the Wechsler Adult Intelligence Scale, third edition (WAIS - III).36 In addition, physical punishment can cause alterations in the dopaminergic regions associated with vulnerability to the abuse of drugs and alcohol.37

For instance, alterations to these chemical switches can change the architecture of the heterochromatin, causing genes to be expressed or silenced.

Yet people who make decisions about safe levels of exposure to chemicals, heavy metals and other environmental factors generally aren't including epigenetic alterations in their deliberations.

The trio concluded that the gene was an indivisible physicochemical unit of molecular size, and they proposed that a mutation involved the alteration of a chemical bond in that molecule.

Soil contamination is the presence of man - made chemicals or other alteration to the natural soil environment.

Such a mechanism could turn chemical ephemera — the ebbing and flowing of calcium ions and gentle currents of nitric oxide — into changes in gene expression and finally into alterations in the «wiring» of the nervous system.

«It is important to begin mechanistic studies of these declines,» the team concludes in a paper presenting the finding published in today's Science, «with habitat alteration, climate change and agricultural chemical usage being potential key drivers of observed shifts.»

New research illuminates definitive brain alterations in troops with Gulf War Illness (GWI) thought to result from the exposure to neurotoxic chemicals, including sarin gas, during the first Persian Gulf War.

«One possibility is alterations in stress hormones and epigenetic changes (chemical modifications) in DNA» Stroud says.

«Most previous studies have focused on using one technique at a time, even though we have evidence that there are alterations in the brain in autism in terms of structure, white - matter connectivity, and brain chemical concentrations.

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.

More recently, brain scans have directly linked these conditions with changes in levels of neurotransmitters — chemicals that convey messages across neurons — or alterations in the number or structure of neurons in different brain areas.

Alterations in the genetic coding for a nerve cell receptor, which detects a chemical signal that is key to behavioral change, could point the way to designing therapies most effective for patients suffering from schizophrenia, drug addiction and other mental illnesses.

The other is a chemical reaction called serpentization, a mineral alteration reaction that is common in such ancient rocks.

«We've analyzed epigenetic alterations, namely the chemical signal called DNA methylation in 500 breast tumors and have compared the patterns obtained with the clinical behavior of these cancers,» says Esteller.

This, researchers say, suggests that a significant proportion of the oceanic crust alterations long attributed to a chemical - physical process may stem from a biological one.

In the course of this work, he has pioneered several new approaches in the fruit fly that have had important implications for mammalian neurobiology, including: the demonstration that the fruit fly has a sleep - like behavior similar to that of mammals, studies of physiological and behavioral consequences of mutations in a neurotransmitter system affecting one of the brain's principal chemical signals, studies making highly localized genetic alterations in the nervous system to alter behavior, and molecular identification of genes causing naturally occurring variation in behavior.

diagenesis: The physical, chemical or biological alteration of sediments into sedimentary rock at relatively low temperatures and pressures that can result in changes to the rock's original mineralogy and texture.

This allows researchers to determine the causal effects on behaviour of temporary alterations in the chemical function of these regions.

Babies are particularly sensitive to chemical changes in their environment because any short - term alterations can have life - long consequences by disrupting proper developmental programming.

Environmental pollutants, such as commonly used insecticides and chemicals in plastics, can impair pituitary gland function, resulting in dysfunction of testosterone - producing cells in the testicles of men and alterations in the reproductive cycles of women.

Immunotoxicology is the study of alterations in the immune system caused by chemicals and drugs.

These behavioral changes were associated with alterations in the GABA system of the brain in the probiotic group, matching the known effects of antidepressant or anxiolytic chemical agents (for example, anxiolytic agents such as benzodiazepines work at GABA receptors)[91].

Depletion of a normal gut microbiome in early life, especially during the post-weaning period, may affect cognitive and social behaviours in the brain through the alteration of neuropeptides (chemical messengers) such as vasopressin and oxytocin (19,20).

Health experts often recommend choosing organic products when shopping for vegetables if you want to avoid chemical interference in food or possible genetic alterations.

Damage can include alteration of the enamel surface, reduced strength of resin - based filling materials, damaged and inflamed gums, chemical burns, blistering of mouth and gum tissues and severe tooth sensitivity.

All the above items are not covered for damage due to accident, misuse, alteration, insufficient or improper maintenance, contaminated or poor quality fuel, damage or corrosion due to chemical treatments or Aftermarket products and impact, use, or the environment.

That's because a sedentary lifestyle leads to an alteration in the three major brain chemicals responsible for mood — and that can create emotional issues.

Lake Turkana is a closed basin lake, and with climate change, you already have increased evaporation, which leads to alteration of the chemical composition of the lake — and alters the ecosystem, and the fish and all the animals living in it.

We can both agree that we should work to minimize the human alteration of the chemical composition of the Earth's atmosphere, but still disagree whether we can skillfully predict the climate consequences of such actions.

Human alteration of environments produces multiple effects, some advantageous to societies, such as enhanced food production, and some detrimental, like environmental pollution with toxic chemicals, excess nutrients and carbon emissions from fossil fuels, and the loss of wildlife and their habitats.