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, with the use of cre-lox technology, a caspase 8 knock-out has been created that exhibits an increase in peripheral T cells, an impaired T cell response, and a defect in neural tube closure.

However, in August 1939, due to the imminence of war and the likelihood of air-raids the Parthenon Sculptures along with Museum's most valued collections were dispersed to secure basements, country houses, Aldwych tube station, the National Library of Wales and a quarry.

However, the yolk sac, extra-embryonic membranes, egg membranes and endocardial tube are considered caenogenetic features.

However, such circular wales are possible using Swiss darning, a form of embroidery, or by knitting a tube separately and attaching it to the knitted fabric.

However, it was less popular when commercial radio broadcasting began in the 1920s, mostly due to the need for an extra tube ( for the oscillator ), the generally higher cost of the receiver, and the level of technical skill required to operate it.

However it was not until around 1912 that other researchers, while attempting to improve the service life of the Audion, stumbled on the principle of the true vacuum tube.

However, tubes still find uses where solid-state devices have not been developed, are impractical, or where a tube has superior performance, as with some devices in professional audio and high-power radio transmitters.

However, it was Lee De Forest who is credited with inventing the triode tube in 1907 while continuing experiments to improve his original Audion tube, a crude forerunner of the triode.

However, reliability was compromised, and production costs for the tube were much greater.

However, far fewer CTs of this design have been produced, mainly due to the higher cost associated with building a much larger X-ray tube and detector array.

However, numerous accounts exist that by 1794 Murdoch was producing coal gas from a small retort containing heated coals with a three or four foot iron tube attached, through which he piped the gas before sending it through an old gun barrel and igniting it to produce light.

However, neutron-sensitive tubes can be produced which either have the inside of the tube coated with boron, or the tube contains boron trifluoride or helium-3 as the fill gas.

However, a ' Ventilation station ', in similar architectural style to tube stations of the time was provided at the site, and is visible today.

However, Fizeau showed the speed of light in water to be less than in air, not more, by inserting a tube of water in the light path.

However, the situation is more complex, since comparative embryology shows that the length axis of the neural tube ( the primordium of the brain ) has three internal bending points, namely two ventral bendings at the cervical and cephalic flexures ( cervical flexure roughly between the medulla oblongata and the spinal cord, and cephalic flexure between the diencephalon and the midbrain ), and a dorsal ( pontine or rhombic ) flexure at the midst of the hindbrain, behind the cerebellum.

However plastic ones are now manufactured which are even less sharp and less likely to puncture the tube.

However, if something interferes and the tube fails to close properly, a neural tube defect will occur.

However, the Waterloo & City was designed and built as a deep tube line ; were this to be connected to the Northern City line this would mean either a reversion to using deep tube stock along the whole length ( as when the NCL was part of the Northern line ), or converting the Waterloo & City for main line sized rolling stock.

( However, the fermenting agent is a bacterium, Clostridium acetobutylicum, that feeds on cellulose, not sugars like the Saccharomyces yeast that produces ethanol.

However, silane produces a lower-quality oxide than the other methods ( lower dielectric strength, for instance ), and it deposits nonconformally.

However, reduction in alkaline liquor produces the water soluble alkali metal salt of the dye, which, in this leuco form, has an affinity for the textile fibre.

However, when energy is transferred by means other than matter-transfer, the transfer produces changes in the second system, as a result of work done on it.

However, there have been examples of poor manufacture ( underprocessing ) and poor hygiene allowing contamination of canned food by the obligate anaerobe Clostridium botulinum, which produces an acute toxin within the food, leading to severe illness or death.

However, gravitational stripping of the interstellar gas and dust that makes up the spiral arms produces a long train of stars known as tidal tails.

However, it also has some features of covalent bonding: it is directional, stronger than a van der Waals interaction, produces interatomic distances shorter than sum of van der Waals radii, and usually involves a limited number of interaction partners, which can be interpreted as a kind of valence.

However, if mediation produces a settlement, legal rights and obligations are affected in differing degrees.

However, like methadone, buprenorphine produces similar cognitive dehabilitation in multiple areas of mental function in both memory and timed choice task tests, which may persist after cessation of substitution treatment.

However, this has been disputed, primarily on the basis that oxycodone produces effects typical of μ-opioid agonists.

However, the Chinese developed a technique in the 1990s in which a penholder uses both sides of the racket to hit the ball, where the player produces a backhand stroke ( most often topspin ) by turning the traditional side of the racket to face one's self, and striking the ball with the opposite side of the racket.

However, scientists have silenced the gene that produces the toxin, making it a potential food crop.

However Daniel P. Whitmire's 1975 analysis indicates that a ramjet may achieve net power via the CNO cycle, which produces fusion at a much higher rate (~ 10 < sup > 16 </ sup > times higher ) than the proton-proton chain.

However, modifying this function produces a bijection from T to the interval ( 0, 1 )— that is, the real numbers > 0 and < 1.

However the lifting occurs, the air cools due to expansion in lower pressure, which in turn produces condensation.

However, it is not the absolute value of the energy level, but the difference between them, which produces the observed frequencies, due to electronic transitions within the atom emitting / absorbing photons of light.

However, an animal directly produces haploid gametes by meiosis.

However, this first harvest almost always produces poor quality or " male " cork.

However, dry granulation often produces a higher percentage of fine granules, which can compromise the quality or create yield problems for the tablet.

However, if the gas from the primary coolant can be made radioactive by the neutrons in the reactor, or a fuel defect could still contaminate the power production equipment, it may be brought instead to a heat exchanger where it heats another gas or produces steam.

However, the same 1, 000 lumens, spread out over ten square metres, produces a dimmer illuminance of only 100 lux.

However, with sufficient care, a system can be designed that produces cryptographically secure random numbers from the sources of randomness available in a modern computer.

However, Jessica falls in love with Leto, and produces a son for him, Paul ( there is some indication that Jessica believed she could achieve the Kwisatz Haderach herself, one generation early ).

However, it produces simple and tractable mathematical models which are useful for gaining insight into the underlying behavior of a system before these other phenomena are considered.