The motion of air relative to the earth's surface.

An enzyme of the oxidoreductase class primarily found in PLANTS. It catalyzes reactions between linoleate and other fatty acids and oxygen to form hydroperoxy-fatty acid derivatives.

Forms of energy that are constantly and rapidly renewed by natural processes such as solar, ocean wave, and wind energy. (from McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

An enzyme that catalyzes the oxidation of arachidonic acid to yield 12-hydroperoxyarachidonate (12-HPETE) which is itself rapidly converted by a peroxidase to 12-hydroxy-5,8,10,14-eicosatetraenoate (12-HETE). The 12-hydroperoxides are preferentially formed in PLATELETS.

Materials or phenomena which can provide energy directly or via conversion.

Tools used in dentistry that operate at high rotation speeds.

Units that convert some other form of energy into electrical energy.

An adverse effect occurring with a medical treatment that is not attributable to the actions of the treatment.

Water waves caused by the gravitational interactions between the EARTH; MOON; and SUN.

A course of action or principle adopted or proposed by a government, party, business, or individual that concerns human interactions with nature and natural resources.

A system using beamed and reflected radio signals to and from an object in such a way that range, bearing, and other characteristics of the object may be determined.

Devices that control the supply of electric current for running electrical equipment.

A space which has limited openings for entry and exit combined with unfavorable natural ventilation such as CAVES, refrigerators, deep tunnels, pipelines, sewers, silos, tanks, vats, mines, deep trenches or pits, vaults, manholes, chimneys, etc.

Any sound which is unwanted or interferes with HEARING other sounds.

Supplying a building or house, their rooms and corridors, with fresh air. The controlling of the environment thus may be in public or domestic sites and in medical or non-medical locales. (From Dorland, 28th ed)

An institute of the CENTERS FOR DISEASE CONTROL AND PREVENTION which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals.

A type of non-ionizing radiation in which energy is transmitted through solid, liquid, or gas as compression waves. Sound (acoustic or sonic) radiation with frequencies above the audible range is classified as ultrasonic. Sound radiation below the audible range is classified as infrasonic.

Supplies used in building.

Polymers of high molecular weight which at some stage are capable of being molded and then harden to form useful components.

The process whereby auditory stimuli are selected, organized, and interpreted by the organism.

Order of mammals whose members are adapted for flight. It includes bats, flying foxes, and fruit bats.

The presence of an infectious agent on instruments, prostheses, or other inanimate articles.

Contamination of the air, bodies of water, or land with substances that are harmful to human health and the environment.

An infraorder of chiefly marine, largely carnivorous CRUSTACEA, in the order DECAPODA, including the genera Cancer, Uca, and Callinectes.

An enduring, learned predisposition to behave in a consistent way toward a given class of objects, or a persistent mental and/or neural state of readiness to react to a certain class of objects, not as they are but as they are conceived to be.

A type of stress exerted uniformly in all directions. Its measure is the force exerted per unit area. (McGraw-Hill Dictionary of Scientific and Technical Terms, 6th ed)

Conditions characterized by disturbances of usual sleep patterns or behaviors. Sleep disorders may be divided into three major categories: DYSSOMNIAS (i.e. disorders characterized by insomnia or hypersomnia), PARASOMNIAS (abnormal sleep behaviors), and sleep disorders secondary to medical or psychiatric disorders. (From Thorpy, Sleep Disorders Medicine, 1994, p187)

Institutions which provide medical or health-related services.

The exertion of a strong influence or control over others in a variety of settings--administrative, social, academic, etc.

Warm-blooded VERTEBRATES possessing FEATHERS and belonging to the class Aves.

The external elements and conditions which surround, influence, and affect the life and development of an organism or population.

Methods of creating machines and devices.

Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.

Programs of disease surveillance, generally within health care facilities, designed to investigate, prevent, and control the spread of infections and their causative microorganisms.

The exposure to potentially harmful chemical, physical, or biological agents in the environment or to environmental factors that may include ionizing radiation, pathogenic organisms, or toxic chemicals.

A functional system which includes the organisms of a natural community together with their environment. (McGraw Hill Dictionary of Scientific and Technical Terms, 4th ed)

The selecting and organizing of visual stimuli based on the individual's past experience.

Facilities that convert NUCLEAR ENERGY into electrical energy.

The number of units (persons, animals, patients, specified circumstances, etc.) in a population to be studied. The sample size should be big enough to have a high likelihood of detecting a true difference between two groups. (From Wassertheil-Smoller, Biostatistics and Epidemiology, 1990, p95)

Computer-based representation of physical systems and phenomena such as chemical processes.

Recording of electric currents developed in the brain by means of electrodes applied to the scalp, to the surface of the brain, or placed within the substance of the brain.

Statistical formulations or analyses which, when applied to data and found to fit the data, are then used to verify the assumptions and parameters used in the analysis. Examples of statistical models are the linear model, binomial model, polynomial model, two-parameter model, etc.

Theoretical representations that simulate the behavior or activity of genetic processes or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.

Ultrasonography applying the Doppler effect, with frequency-shifted ultrasound reflections produced by moving targets (usually red blood cells) in the bloodstream along the ultrasound axis in direct proportion to the velocity of movement of the targets, to determine both direction and velocity of blood flow. (Stedman, 25th ed)

A procedure consisting of a sequence of algebraic formulas and/or logical steps to calculate or determine a given task.

The properties, processes, and behavior of biological systems under the action of mechanical forces.