However, there are also variant types, such as infrared film ( in black and white or false color ); specialist technical films, such as those used for X-rays ; and obsolete processes, such as orthochromatic film.

However, as is the case with X-rays, materials with high atomic number such as lead or depleted uranium add a modest ( typically 20 % to 30 %) amount of stopping power over an equal mass of less-dense and lower atomic weight materials ( such as water or concrete ).

However, as the pole of Vega is facing us and a polar coronal hole may be present, confirmation of a corona as the likely source of the X-rays detected from Vega ( or the region very close to Vega ) may be difficult as most of any coronal X-rays would not be emitted along the line of sight.

However, because X-ray emissions are blocked by the Earth's atmosphere, observation of celestial X-ray sources is not possible without lifting instruments to altitudes where the X-rays can penetrate.

However, in May 2005, highly focused X-rays produced at the Stanford Linear Accelerator Center in Menlo Park, California, were used by Drs.

However, all known microquasars produce large quantities of X-rays, whereas the object's X-ray flux is below the measurement threshold.

However other methods of detection such as X-rays are used for less visible areas of teeth and to judge the extent of destruction.

However, any surrounding mass which had absorbed the X-rays ( and other " heat ") would gain this gram of mass from the resulting heating, so the mass " loss " would represent merely its relocation.

) However, the denser instruments used for gamma rays and hard X-rays make INTEGRAL the heaviest scientific payload ever flown by ESA.

However, the Geiger counter could not distinguish X-rays produced from specific elements and in 1950, Castaing added a quartz crystal between the sample and the detector to permit wavelength discrimination.

However, in recent decades, for what doubtless are multiple reasons, an unannounced but nonetheless readily observable shift has occurred in both facets of national activity.

However, in the context of legal and civic policy, these controversies are less than novel.

However, despite the insight of many of his observations, his own conclusions are open to suspicion because of his failure to employ at all times the correct research methods.

However, there are still several types of calls that necessitate the use of telephone operators.

However, he states unequivocally `` the scandals in business are far less significant than the scandals in labor ''.

However, few are taxed, and the owners and location of most boats are unknown to the assessors on the date of assessment of town valuations.

However, the surface temperature gradient can produce erroneous vapor-pressure measurements for the bulk liquid helium unless precautions are taken to isolate the tube ( which passes through the surface to the vapor pressure bulb ) from the liquid helium surface.

However, if their United States income is not subject to the withholding of tax on wages, their returns are due June 15, 1962, if they use a calendar year, or the 15th day of the 6th month after the close of their fiscal year.

However, the aircraft which we have today are tied to large, `` soft '' airfields.

However, some formulas are used more than others.

However, there is also much to be gained by making use of the abilities of the local people who are available and interested in recreation.

However, there are photographs of suspended drops of cyclohexanol phthalate ( viscosity 155 poises ) suspended in corn syrup of 71 poises in a paper by Mason and Bartok.

However, any oxygen nonequivalence would shorten either the already extremely short Af interlayer distance of 2.55 A or the non-hydrogen-bonded Af interlayer interactions which are already quite short at 2.58 Aj.

However, as so many of the records are not certainly based on newborn snakes, these data must be taken tentatively ; ;

However, if these procedures are applied more often, conditioned emotional responses are temporarily abolished.

However, it cannot be presumed, informal though the structure of the population seems, that there are not well-defined roles within the system.

However, the differences in procedure are fundamental.

However, the regionally differentiated results, which appear below in tables, are interesting evidence of the problems of developing self-government under even the most favorable circumstances.

However, if Federal funds are used, it would be entirely appropriate to train workers for jobs which could be obtained elsewhere as well as for jobs in the area of chronic unemployment.

However, it is not known to either the union or the public precisely how much of a cost increase is caused by a given change in the basic wage rate, although the companies are presumed to have reliable estimates of this magnitude.

However, there are relatively few such political constituencies, and, as has been pointed out, there is seldom a clear-cut distinction between the educational interests of one social class and those of another.

However, modesty and triviality are different qualities.

`` However, evidence that the Axis powers are making significant preparations indicative of such an intention is being reported with increasing frequency from a variety of sources.

However, both protons and neutrons are composite particles composed of elementary particles called quarks.

However, this definition only works well for substances that are composed of molecules, which is not true of many substances ( see below ).

However, metallic bonds are more collective in nature than other types, and so they allow metal crystals to more easily deform, because they are composed of atoms attracted to each other, but not in any particularly-oriented ways.

However, the primary cell wall, can be defined as composed of cellulose microfibrils aligned at all angles.

However, on the screen, the light is always found to be absorbed as though it were composed of discrete particles or photons.

However, the later discovery of the photoelectric effect demonstrated that under different circumstances, light can behave as if it is composed of discrete particles.

However, Schmidt left this composition unfinished, and in the summer and autumn of 1938, a few months before his death, set it aside to devote himself to two other commissioned works for the one-armed pianist Paul Wittgenstein, for whom he had often composed: the Clarinet Quintet in A major and the solo Toccata in D minor.

However, Rossini composed the rest of the score in 1841.

However, more recent scholarship shows that this mass was in fact composed before the cardinals convened to discuss the ban ( possibly as much as ten years before ).

However, while his poetry features some Aeolisms there are no words that are certainly Boeotian — he composed in the main literary dialect of the time ( Homer's dialect ): Ionian.

However states and nations are composed of thousands or millions of unrelated individuals.

However, task-orientated behaviors composed the in-role category and the extra-role category included interpersonally-oriented behaviors, down-time behaviors and destructive and hazardous behaviors.

However it was the Franks who came to dominate Western and Central Europe after the fall of Rome, and they generally fielded armies composed of large masses of infantry, with an infantry elite, the comitatus, which often rode to battle on horseback rather than marching on foot.

However, whether a specific meteoroid trail will be primarily composed of small or large particles, and thus the relative brightness of the meteors, was not understood.

However, almost all high medieval armies in Europe were composed of a great deal of paid core troops, and there was a large mercenary market in Europe from at least the early 12th century.

However, both Scotland and Ireland shared a common Gaelic culture during the period in which the poems are set, and some Fenian literature common in both countries was composed in Scotland.

However, when Ferdinand Marcos declared martial law, he formed his own party, the Kilusang Bagong Lipunan ( KBL, New Society Movement ) composed mainly of his loyal allies from the Nacionalista Party and Liberal Party, as well as some other parties.

However, as it is composed of both pure goodness and pure evil, it might have enough power to rival that of God Himself.

However, the 4th Army was composed of 520 tanks, all of which were the obsolete T-26, as opposed to the authorized strength of 1, 031 newer medium tanks.

However, Oppian of Corycus, a Greek author wrote a major treatise on sea fishing, the Halieulica or Halieutika, composed between 177 and 180.

However, the first designated full blown scores were composed earlier, in 1908, by Camille Saint-Saëns, for The Assassination of the Duke of Guise, and by Mikhail Ippolitov-Ivanov, for Stenka Razin.

However, he also enjoyed personal and artistic support from a new generation of Russian performers, notably Sviatoslav Richter and Mstislav Rostropovich and for the latter he composed his Symphony-Concerto.

However, the most common image of terrorism is that it is carried out by small and secretive cells, highly motivated to serve a particular cause and many of the most deadly operations in recent times, such as the September 11 attacks, the London underground bombing, and the 2002 Bali bombing were planned and carried out by a close clique, composed of close friends, family members and other strong social networks.

However, some older operating systems ( such as OS / VS1 and OS / VS2 SVS ) and even modern ones ( such as IBM i ) are single address space operating systems that run all processes in a single address space composed of virtualized memory.