Sentences with phrase «relatively small chemical»

Not exact matches

However, a group of Dutch scientists has discovered that if aphids are exposed to the active chemical present in their «alarm» pheromone, they emerge from the lettuce hearts and can be killed by relatively small doses of insecticide (Journal of Applied Entomology, vol 115, p 432).

«Even relatively small changes in the temperature and water content of the magma can drastically alter the chemical and physical properties of the unerupted magma,» explained lead author Dr. Mike Cassidy from the Institute of Geosciences at Mainz University.

Smell or olfaction occurs when chemicals stimulate olfactory receptors on a relatively small patch of tissue located high in the nasal cavity.

The discovery team presumes that VP113 has an icy reflective surface like other relatively small, outer Solar System objects, as the dwarf planet is observed to have a pink tinge, which is hypothesized to result from chemical changes produced by the effect of radiation on frozen water, methane, and carbon dioxide.

Dorland medical dictionary further defines a poison as «any substance which, when relatively small amounts are ingested, inhaled, or absorbed, or applied to, injected into, or developed within the body, has chemical action that may cause damage to structure or disturbance of function, producing symptomatology, illness or death.»

«Tom Webster, associate chair of environmental health at Boston University's School of Public Health and a paper coauthor, says scientists are particularly concerned about the potential risk that such chemicals pose to small children, who can unintentionally consume relatively large amounts of dust.»

The problem is that relatively small concentrations of these chemicals can cause adverse health effects.»

This relatively small public school in Providence offers a few stimulating opportunities for undergraduate psychology students, such as a behavioral neuroscience minor and a concentration in chemical dependency and addiction studies.