When hemoglobin combines with CO, it forms a very bright red compound called carboxyhemoglobin, which may cause the skin of CO poisoning victims to appear pink in death, instead of white or blue.

When using an injection port, the syringe needle always stays above the surface of the skin, thus reducing the number of skin punctures associated with intensive insulinotheraphy.

When he lights the pipe, the blast knocks him unconscious, blackens his skin and burns away all his hair.

When used as a part of an incendiary weapon, napalm can cause severe burns ( ranging from superficial to subdermal ) to the skin and body, asphyxiation, unconsciousness, and death.

When ultraviolet radiation is not absorbed by the atmosphere or other protective coating, it can cause damage to the skin known as sunburn or trigger an adaptive change in human skin pigmentation.

When rubbed on the skin at the painful site, snake oil was claimed to bring relief.

When Louise goes below deck momentarily, a large, strange cloud on the horizon passes over the craft, leaving a reflective mist on Scott's bare skin.

When questioned by his captain, Spender replies " We'll rip it up, rip the skin off, and change it to fit ourselves ... We Earth Men have a talent for ruining big, beautiful things ", referring to Earth.

When kept in aquaria, small sheets of dead skin can be seen in the water ( often appearing to be a thin piece of plastic ) having been sloughed off when the animal deliberately rubs itself against a piece of wood or stone.

When the mosquito first lands on a potential host, her mouthparts will be enclosed entirely in this sheath, and she will touch the tip of the labium to the skin in various places.

When voyagers traveled upstream, they conveniently folded their skin boats and transported them via pack animals.

When the spacesuit is removed on return to the spacecraft, there will be the potential for the dust to contaminate surfaces and increase the risks of inhalation and skin exposure.

When a mosquito carrying dengue virus bites a person, the virus enters the skin together with the mosquito's saliva.

When spores are inhaled, ingested, or come into contact with a skin lesion on a host, they may become reactivated and multiply rapidly.

When the patient enters the operating room, the skin surface to be operated on, called the operating field, is cleaned and prepared by applying an antiseptic such as chlorhexidine gluconate or povidone-iodine to reduce the possibility of infection.

When a strange message written in Max's genetic code makes an appearance on her skin, it is revealed that Sandeman is a renegade from the breeding cult and Ames White is his son, who is still loyal to the cult and hates his father's transgenic creations with a passion.

When the new ICC rule took effect on November 1, passengers were permitted to sit wherever they chose on the bus ; " white " and " colored " signs came down in the terminals ; separate drinking fountains, toilets, and waiting rooms were consolidated ; and lunch counters began serving people regardless of skin color.

When the CFTR protein does not work, chloride and thiocyanate are trapped inside the cells in the airway and outside in the skin.

When Valerian sunk under the weight of shame and grief, his skin, stuffed with straw, and formed into the likeness of a human figure, was preserved for ages in the most celebrated temple of Persia ; a more real monument of triumph, than the fancied trophies of brass and marble so often erected by Roman vanity.

When ramming into a person, the boar will slash the tusks upwards, creating sizeable open lacerations on the skin.

When ultraviolet rays penetrate the skin and damage DNA, thymidine dinucleotide ( pTpT ) fragments from damaged DNA will trigger melanogenesis and cause the melanocyte to produce melanosomes, which are then transferred by dendrite to the top layer of keratinocytes.

When converted to the retinal ( retinaldehyde ) form, vitamin A is essential for vision, and when converted to retinoic acid, is essential for skin health, teeth remineralization and bone growth.

When optic neuritis is associated with MRI lesions suggestive of multiple sclerosis ( MS ) then general immunosuppressive therapy for MS is often prescribed ( IV methylprednisolone may shorten attacks ).

When any of these tests are positive, CT scanning of the adrenal gland and MRI of the pituitary gland are performed to detect the presence of any adrenal or pituitary adenomas or incidentalomas ( the incidental discovery of harmless lesions ).

When this happens, severe symptoms including blistering skin lesions, septic shock, and even death can occur.

When hemangiomas interfere with vision, breathing, or threaten significant cosmetic injury ( facial lesions and in particular, nose and lips ), they are usually treated.

When viewed with MRI, glioblastomas often appear as ring-enhancing lesions.

When the kohen comes to perform the inspection, he looks for lesions on the wall that appear either intense green ( ירקרקת ) or intense red ( אדמדמת ) and that appear sunken below the plane of the wall's surface ( שפל מן הקיר, literally " lower than the wall ").

When lesions involve other oral mucosa in addition to the dorsal and lateral tongue, the condition is called migratory stomatitis ( or ectopic geographic tongue ); in this uncommon condition, lesions infrequently involve also the ventral tongue and buccal or labial mucosa, the soft palate and floor of the mouth.

When lamb and mutton are irradiated at substerilization doses, the meat becomes dehydrated, the fat becomes chalky, and, again, unnatural changes in color occur.

When used appropriately, opioids and similar narcotic analgesics are otherwise safe and effective, however risks such as addiction and the body becoming used to the drug ( tolerance ) can occur.

When subjected to loading, debonding may occur at different locations in the adhesive joint.

When an APAF-1 gene trap is introduced into cells, many morphological changes occur, such as spina bifida, the persistence of interdigital webs, and open brain.

When assured by Mersenne that it was, indeed, the product of the son not the father, Descartes dismissed it with a sniff: " I do not find it strange that he has offered demonstrations about conics more appropriate than those of the ancients ," adding, " but other matters related to this subject can be proposed that would scarcely occur to a sixteen-year-old child.

When barter did in fact occur, it was usually between either complete strangers or would-be enemies.

When context switches occur frequently enough the illusion of parallelism is achieved.

When the process of escape and return reaches an equilibrium, the vapor is said to be " saturated ," and no further change in either vapor pressure and density or liquid temperature will occur.

When the bid matches the offer, a transaction can easily occur ( even instantenously, as in a typical stock market ).

* When certain consonants occur together, special conjunct symbols are used which combine the essential parts of each letter.

When President Aristide returned to Haiti, some improvements did occur in the manufacturing sector.

When making assessments of how often relatively rare events will occur, analyses are made in terms of the return period of such events.

When inspired air contains CO levels as low as 0. 02 %, headache and nausea occur ; if the CO concentration is increased to 0. 1 %, unconsciousness will follow.

# When a given style of production relations no longer supports further progress in the productive forces, either further progress is strangled, or ' revolution ' must occur.

When this approach is used, the hash function must be chosen so that the result has fairly uniform distribution between 0 and n − 1, for any value of n that may occur in the application.

When the Sun is active, strong solar flares can occur that will hit the sunlit side of Earth with hard X-rays.

When either writing through or directly to physical device registers, this may, but not necessarily, cause a real interrupt to occur at the device's central processor unit ( CPU ), if it has one.

When units occur in exponentiation, such as in square and cubic forms, any multiplier prefix is considered part of the unit, and thus included in the exponentiation.

When a hydrated crystal is left in air, dehydration may occur slowly.

When transaction costs are low and parties involved are perfectly informed, a mutually beneficial agreement will occur: whoever values the property the highest will end up with it.

When a fluid is flowing through a closed channel such as a pipe or between two flat plates, either of two types of flow may occur depending on the velocity of the fluid: laminar flow or turbulent flow.

When Luthor admits that he had not only anticipated the attack, but had arranged for it to occur in order to lure Superman out, the Mayor deputizes Superman to arrest Luthor for reckless endangerment.

When a peripheral fiber is severed, the myelin sheath provides a track along which regrowth can occur.

When core convection does not occur, a helium-rich core develops surrounded by an outer layer of hydrogen.

When this did not occur, he soon returned to Rome, discussing a truce with the assassins ' faction.