In any instance, you should determine the exposure according to the type of light which falls on most of the subject area.

Also, the light sources are shielded from dirt and weather exposure and cannot obstruct the view of the sign.

Figure 2, above, shows the aging properties of urethane foams as determined by the percent of change in tensile strength during exposure to ultra-violet light.

Many cultural works are sensitive to environmental conditions such as temperature, humidity and exposure to light and ultraviolet light.

For example, sunglasses that counter exposure to particular light wavelengths can improve seizure control in certain photosensitive epilepsies.

This new rating is not a change to the stock itself-it is merely a way of calculating exposure without figuring out the compensation after each light reading.

Kodak's Double-X stock is rated 250D / 200T, since the tungsten light will give slightly less exposure than an equivalent amount of daylight.

After electrophoresis the gel is illuminated with an ultraviolet lamp ( usually by placing it on a light box, while using protective gear to limit exposure to ultraviolet radiation ).

Even short exposure of nucleic acids to UV light causes significant damage to the sample.

If the DNA is to be used after separation on the agarose gel, it is best to avoid exposure to UV light by using a blue light excitation source such as the XcitaBlue UV to blue light conversion screen from Bio-Rad or Dark Reader from Clare Chemicals.

With pest problems reduced, and nutrients constantly fed to the roots, productivity in hydroponics is high, although plant growth can be limited by the low levels of carbon dioxide in the atmosphere, or limited light exposure.

Restriction of blood flow can arise from impaired endothelial function due to the usual causes associated with coronary artery disease, but can also be caused by prolonged exposure to bright light.

The window allows the memory contents of the chip to be erased, by exposure to strong ultraviolet light in an eraser device.

The application in carbon arc light led to the exposure of people to rare earth element oxides and fluorides, sometimes led to pneumoconiosis.

This time exposure ( photography ) | exposure photo of New York City at night shows skyglow, one form of light pollution.

Environmental stress, such as prolonged exposure to elevated sound levels or bright light, can also affect libido.

Lithography in MEMS context is typically the transfer of a pattern into a photosensitive material by selective exposure to a radiation source such as light.

Erasing the EPROM required exposure to ultraviolet light through a transparent quartz lid.

Besides the formation of cis isomer in stilbene-containing brighteners ( only the trans isomer is optically active ), continued exposure to UV-containing light will actually cleave the molecule and start the process of degradation.

Since exposure to light leads to greening of the skins and the development of solanine, growers are interested in covering such tubers.

Typically, a lens is used to focus the light reflected or emitted from objects into a real image on the light-sensitive surface inside a camera during a timed exposure.

The lack of family history does not rule out CMT, but it will allow the doctor to rule out other causes of neuropathy such as diabetes or exposure to certain chemicals or drugs.

Deforestation causes increased erosion rates due to exposure of mineral soil by removing the humus and litter layers from the soil surface, removing the vegetative cover that binds soil together, and causing heavy soil compaction from logging equipment.

The downside of this is that prolonged exposure causes hallucinations, and in some cases, insanity.

The most common cause of lung cancer is long-term exposure to tobacco smoke, which causes 80 – 90 % of lung cancers.

Poor ventilation of the mines causes exposure to harmful gases, heat and dust inside sub-surface mines, which can cause injury, illness and death.

The clinic received a large amount funding from John D. Rockefeller Jr. and his family, which continued to make donations to Sanger's causes in future decades, but generally made them anonymously to avoid public exposure of the family name, and to protect family member Nelson Rockefeller's political career since openly advocating birth control could have led to the Catholic Church opposing him politically.

While the exposure of the wheels to the airstream causes a very high aerodynamic drag at high speeds, it allows improved cooling of the brakes, which is important on road courses with their frequent changes of pace.

Light exposure causes greening from chlorophyll synthesis, thus giving a visual clue as to areas of the tuber that may have become more toxic ; however, this does not provide a definitive guide, as greening and glycoalkaloid accumulation can occur independently of each other.

Because the presence of moisture causes the glue to set, exposure to moisture in the air can cause a tube or bottle of glue to become unusable over time.

In addition, recent studies are indicating more possible causes for gender dysphoria, stemming from genetic reasons and prenatal exposure to hormones, as well as other psychological and behavioral reasons.

While they may through sheer exposure become involved in causes or controversies ( as Paris Hilton did in the US presidential election, 2008 ) it's clearly not correct to label all individually unique talent or economic value as being an " intellectual " asset.

While in certain cases there is no identifiable cause, typical causes include problems in intrauterine development ( e. g. exposure to radiation, infection ), asphyxia before birth, hypoxia of the brain, and birth trauma during labor and delivery, and complications in the perinatal period or during childhood.

Environmental medicine specialists claim MCS causes negative health effects in multiple organ systems, and respiratory distress, seizures, cognitive dysfunction, heart arrhythmia, nausea, headache, and fatigue can result from exposure to levels of common chemicals that are normally deemed as safe.

With regard to the potential for exposure to chemicals in the workplace and MCS, the U. S. Occupational Safety and Health Administration ( OSHA ) has indicated MCS is highly controversial and there is insufficient scientific evidence to explain the relationship between the theorized causes of MCS and its symptoms.

High noise levels can contribute to cardiovascular effects and exposure to moderately high levels during a single eight hour period causes a statistical rise in blood pressure of five to ten points and an increase in stress and vasoconstriction leading to the increased blood pressure noted above as well as to increased incidence of coronary artery disease.

During the first few weeks after exposure, the infection typically causes a mild, flu-like illness or no illness.

" Short-term exposure to microgravity causes space adaptation syndrome, a self-limiting nausea caused by derangement of the vestibular system.

Long-term exposure causes multiple health issues.

This causes increased coughing in order to remove the mucus, and is often a result of extended periods of exposure to cigarette smoke.

When a space weather event causes radiation exposure to exceed the safe level set by aviation authorities, the aircraft's flight path is deviated to avoid the polar region.

With other causes including burns, environmental exposure and excess urine loss due to diabetic ketoacidosis and diabetes insipidus.

It causes an ion-selective depletion of near surface layers of glasses and gives an inverse square root dependence of corrosion rate with exposure time.