Some species possess light-producing organs called photophores ; these are widespread among deep-sea fishes.

In all but one species, Taaningichthys paurolychnus, a number of photophores ( light-producing organs ) are present ; these are paired and concentrated in ventrolateral rows on the body and head.

The vampire squid is almost entirely covered in light-producing organs called photophores.

The coloration is typically dark brown or black ; a few ( mostly Gonostomatoidei ) are silver, and photophores ( light-producing organs ) are common in this order.

Perhaps the most striking feature of the family is seen in mature females ; upon maturity a ring-shaped photophore — a light-producing organ — develops to encircle the mouth.

" Thomas Edison is said to have asked when he learned that Moore had started to tinker with light-producing tubes of gas as a potential replacement for the incandescent bulb.

Players can use their flashlight to repel certain creatures, and killing them is accomplished with such light-producing ammunition as " magnesium bullets " and " phosphorus shells.

Some species ( excluding Planctoteuthis ) are bioluminescent, with photophores ( light-producing organs ) variably present on the inner surface of the ventral arms, on the ventral surface of the eyes ( 1 – 3 patches or bands ), on the ink sac, and near the club terminus.

VLC can be used as a communications medium for ubiquitous computing, because light-producing devices ( such as indoor / outdoor lamps, TVs, traffic signs, commercial displays, car headlights / taillights, etc.

Quorum sensing was first observed in Vibrio fischeri, a bioluminiscent bacterium that lives as a mutualistic symbiont in the photophore ( or light-producing organ ) of the Hawaiian bobtail squid.

They have a number of green or red light-producing photophores aligned along the undersides of their heads or bodies.

Complex, light-producing organs called photophores densely cover the entire underside, except for the collar, and produce a vivid green glow.

This light-producing process, called fluorescence, causes the beams of ions emerging from the cathode to glow.

In the 1850s the market for light-producing liquid fuels was dominated by coal oil and by an increasingly inadequate supply of whale oil.

Although the United States and the U.S.S.R. have been arguing whether there shall be four, five or six top assistants, the most important element in the situation is not the number of deputies but the manner in which these deputies are to do their work.

Eventually it became clear to me, partly with the aid of another schizophrenic patient who could point out my condescension to me somewhat more directly, that this man, with his condescending, `` You're welcome '', was very accurately personifying an element of obnoxious condescension which had been present in my own demeanor, over these months, on each of these occasions when I had bid him good-bye with the consoling note, each time, that the healing Christ would be stooping to dispense this succor to the poor sufferer again on the morrow.

Of course, there is an element of training here: these gifted people, by concentration, study, guidance, have learned to develop their power.

He proposed that each element consists of atoms of a single, unique type, and that these atoms can join together to form chemical compounds.

In order to combine these image elements correctly, it is necessary to keep an associated matte for each element.

One of these was the property, an essential universal true of the species, but not in the definition ( in modern terms, some examples would be grammatical language, a property of man, or a spectral pattern characteristic of an element, both of which are defined in other ways ).

This may be done for every element in these groups or a subsample of elements may be selected within each of these groups.

During the war against the Sandinista government, the contras carried out many violations of human rights, and evidence suggests that these were systematically committed as an element of warfare strategy.

* all the external entities used by these standard document types are referenced by simple attributes, declared with the CDATA type in their standard DTD ( such as the " href " attribute of an anchor " a " element, or the " src " attribute of an image " img " element, whose values are interpreted as a URI, without needing any catalog of public identifiers, i. e., known FPI );

The Indian and African plates ' motions have also been shown to be coupled, with the common element being the position of these plates relative to the location of the Réunion plume head.

The apparent class distinction in almost all of these paintings is completely neutralized by Death as the ultimate equalizer, so that a sociocritical element is subtly inherent to the whole genre.

At the end of each week, the project manager identifies every detailed element of work that has been completed, and sums the PV for each of these completed elements.

In December 1938, the German chemists Otto Hahn and Fritz Strassmann sent a manuscript to Naturwissenschaften reporting they had detected the element barium after bombarding uranium with neutrons ; simultaneously, they communicated these results to Lise Meitner.

There are many different interpretations of these spins and skaters who create new ones may have the element named after them.

These areas do not stand alone, however, as often a particular item or element may fit into more than one of these areas.

In these cases there is a design element ( usually text ) which is not symmetric and should be read in the same direction, regardless of whether the hoist is to the viewer's left or right.

The only element lacking for the creation of these fields was an efficient algebraic notation in which to express his concepts.

A new physical therapy approach for patients with pusher syndrome suggests that the visual control of vertical upright orientation, which is undisturbed in these patients, is the central element of intervention in treatment.

By sorting formulas according to the number of atoms of each element present in the formula according to these rules, with differences in earlier elements or numbers being treated as more significant than differences in any later element or number — like sorting text strings into lexicographical order — it is possible to collate chemical formulas into what is known as Hill system order.

Very rarely the element can be found as grains of native ( free ) metal, but these are not of commercial importance.

This implies that every element of Boolean algebra is idempotent with respect to both of these operations.

The advantage of this technique is that only a medium-resolution monochromator is necessary for measuring AAS ; however, it has the disadvantage that usually a separate lamp is required for each element that has to be determined.

Inside the sealed lamp, filled with argon or neon gas at low pressure, is a cylindrical metal cathode containing the element of interest and an anode.

A mercury ( element ) | mercury arc lamp from a fluorescence microscope.

If the threshold element is a neon lamp, the circuit also provides a flash of light with each discharge of the capacitor.

In the traditional aarti ceremony, the flower represents the earth ( solidity ), the water and accompanying handkerchief correspond with the water element ( liquidity ), the lamp or candle represents the fire component ( heat ), the peacock fan conveys the precious quality of air ( movement ), and the yak-tail fan represents the subtle form of ether ( space ).

In the upper left quadrant, the lamp of learning, which has been an element of the official Bridgeport's seal since 1931, is shown.

Tesla used an incandescent-type lamp globe with a single internal conductive element and excited the element with high voltage currents from a Tesla coil, thus creating the brush discharge emanation.

If the initial polarization filter is inserted between the lamp and the image generation element, the light intensity striking the image element is not any higher than normal without the polarizing filter, and overall image contrast transmitted to the screen is not affected.

In 1906, the Osram incandescent lamp was developed ; its name was formed from the German words OSmium, from the element osmium, and WolfRAM, from the element tungsten ( called wolfram in many languages and an alternative name in English ).

There is the possibility of the front lens element on the lamp head cracking from thermal shock ( though not completely blowing out or shattering ).

GFAA spectrometry instruments have the following basic features: 1. a source of light ( lamp ) that emits resonance line radiation ; 2. an atomization chamber ( graphite tube ) in which the sample is vaporized ; 3. a monochromator for selecting only one of the characteristic wavelengths ( visible or ultraviolet ) of the element of interest ; 4. a detector, generally a photomultiplier tube ( light detectors that are useful in low-intensity applications ), that measures the amount of absorption ; 5. a signal processor-computer system ( strip chart recorder, digital display, meter, or printer ).