Sentences with phrase «chemical changes forced»

Not exact matches

How this metamorphosis takes place; how a force existing as motion, heat, or light can become a mode of consciousness; how it is possible for aerial vibrations to generate the sensation we call sound, or for the forces liberated by chemical changes in the brain to give rise to emotion, — these are mysteries which it is impossible to fathom.

However, the shape of a molecule can change, for example, through proximity to other molecules, external forces and excitations, and also when a molecule makes a chemical connection with another molecule, for instance in a chemical reaction.

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.

Changes in the force of interaction between the tip and a substrate are measured as a function of chemical conditions.

Instead of trying to force the tank to change through the use of chemicals, we strive to let nature (usually bacteria) maintain the aquarium.

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.

Martini operates the change of state of the inner materials of his works (resins, fibers, cements) through a direct or forced interaction or through the aid of chemical catalyzers.

Once the ice reaches the equator, the equilibrium climate is significantly colder than what would initiate melting at the equator, but if CO2 from geologic emissions build up (they would, but very slowly — geochemical processes provide a negative feedback by changing atmospheric CO2 in response to climate changes, but this is generally very slow, and thus can not prevent faster changes from faster external forcings) enough, it can initiate melting — what happens then is a runaway in the opposite direction (until the ice is completely gone — the extreme warmth and CO2 amount at that point, combined with left - over glacial debris available for chemical weathering, will draw CO2 out of the atmosphere, possibly allowing some ice to return).

However, both the driving force and the climate reconstructions over the pre-industrial era are based on the analysis of the natural archives of climate sensitive quantities, such as the growth of trees and seashells, and the changes of chemical, biological, and isotopic compositions in lake sediments and ice core samples.

Researchers began to take an interest, struggling to understand how the level of carbon dioxide had changed in the past, and how the level was influenced by chemical and biological forces.

The Ozone and Water Vapor Group conducts research on the nature and causes of the depletion of the stratospheric ozone layer and the role of stratospheric and tropospheric ozone and water vapor in forcing climate change and in modifying the chemical cleansing capacity of the atmosphere.

«This project will enable precision measurements of the physical, chemical and biological changes that occur when cells are subjected to mechanical loading, ranging from small perturbations to high - force, high - speed impacts,» said Megan Valentine from UC Santa Barbara.