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The star system was discovered in 1948 by Willem Jacob Luyten in the course of compiling a catalog of stars of high proper motion ; he noted its exceptionally high proper motion of 3.37 arc seconds annually and cataloged it as Luyten 726-8 .	The star system was discovered in 1948 by W.J Luyten in the course of compiling a catalogue of stars of high proper motion ; he noted its exceptionally high proper motion of 3.37 arc seconds annually and catalogued it as Luyten 726-8 .
Like Luyten 726-8A , this star was also found to be variable and given the variable star designation UV Ceti .	The most spectacular is Luyten 726-8B , which was given the variable star designation UV Ceti .
Luyten 726-8 ( also known as Gliese 65 ) is a binary star system that is one of Earth 's nearest neighbors , at about 8.7 light years from Earth in the constellation Cetus .	It is about 8.7 light years from Earth in the constellation Cetus .
The distance between the two stars varies from 2.1 to 8.8 astronomical units ( 310 to 1,320 Gm ) .	The distance between the two stars varies from 2.1 to 8.8 AU .
Many of the original exhibitions at the museum were from the World 's Columbian Exposition of 1893 .	The museum was founded in 1893 and had used old exhibitions that were shown from the World 's Columbian Exposition of 1893 , including exhibits about trains .
The Field Museum of Natural History , located in Chicago , Illinois , USA , is one of the largest natural history museums in the world .	The Field Museum of Natural History ( or Field Museum ) is in Chicago , Illinois , U.S. .
This predatory mollusk sucks air into its stomach to keep it afloat and using its muscular foot it clings to the surface film .	This predatory mollusc sucks air into its stomach to keep it afloat and using its muscular foot it clings to the surface film .
If it finds a small victim Glaucus simply envelops it with its capacious mouth , but if the prey is a larger siphonophore the mollusk nibbles off its fishing tentacles , the ones carrying the most potent nematocysts .	If it finds a small victim Glaucus simply envelops it with its large mouth , but if the prey is a larger siphonophore the mollusc nibbles off its fishing tentacles , the ones carrying the most potent nematocysts .
The surface dwelling nudibranch , Glaucus atlanticus is a specialist predator of siphonophores , such as the Portuguese Man O ' War .	The surface dwelling nudibranch , Glaucus atlanticus is a specialist predator of jellyfish , such as the Portuguese Man o ' War .
Once the specimen is physically irritated or touched by another creature , it will release the mucus automatically .	Once the specimen is physically irritated or touched by another creature , it will release the slime automatically .
All known nudibranchs are carnivorous .	Most nudibranchs are carnivorous .
Another method of protection is the release of an acid from the skin .	Another method of protection is the release of a sour liquid from the skin .
In the course of their evolution , nudibranchs have lost their shell while developing alternative defense mechanisms .	In the course of evolution , sea slugs have lost their shell , and have developed other defense mechanisms .
Some species have venomous appendages ( cerata ) on their sides , which deter predators .	Most species have venomous appendages on their sides .
They lack a mantle cavity .	Unusually for molluscs , they lack a mantle cavity .
Similarly , nudibranchs can also take in plant cells and reuse the chloroplasts ( plant cell organelles used for photosynthesis ) to make food for themselves .	They can also take in plants ' chloroplasts ( plant cell organelles used for photosynthesis ) and use them to make food for themselves .
These stolen nematocysts , called kleptocnidae , wander through the alimentary tract without harming the nudibranch .	The nematocysts wander through the alimentary canal without harming the nudibranch .
Nudibranchs that feed on hydrozoids can store the hydrozoids ' nematocysts ( stinging cells ) in the dorsal body wall , the cerata .	Nudibranchs that feed on hydroids can store the hydroids ' nematocysts ( stinging cells ) in the dorsal body wall .
This group includes some of the most colorful creatures on earth .	Among this group can be found the most colorful creatures on earth .
Nudibranchs are hermaphroditic , and thus have a set of reproductive organs for both sexes , but they can not fertilize themselves .	Nudibranchs are hermaphrodite , and thus have a set of reproductive organs for both sexes , but they rarely fertilize themselves .
Nudibranchs can protect themselves from the hydrozoids and their nematocysts ; the specific mechanism is yet unknown , but special cells with large vacuoles probably play an important role .	It is not yet clear how , but special cells with large vacuoles probably play an important role .
Autogenic training is a relaxation technique developed by the German psychiatrist Johannes Heinrich Schultz and first published in 1932 .	Autogenic training is a relaxation technique developed by the German psychiatrist Johannes Schultz and first published in 1932 .
Each session can be practiced in a position chosen amongst a set of recommended postures ( for example , lying down , sitting meditation , sitting like a rag doll ) .	Each session can be practiced in a position chosen amongst a set of recommended postures ( e.g. lying down , sitting meditation , sitting like a rag doll , etc. ) .
Autogenic Training is contraindicated for people with heart conditions or psychotic disorders .	Autogenic Training is counter-indicated , or needs to be adapted , for a series of conditions including : heart problems such as myocardial infarction , diabetes , psychotic conditions such as schizophrenia , glaucoma , alcohol or drug abuse , epilepsy .
This contraction ( more formally called Lorentz contraction or Lorentz-FitzGerald contraction after Hendrik Lorentz and George FitzGerald ) is usually only noticeable at a substantial fraction of the speed of light .	The Lorentz contraction is also called the Fitzgerald contraction or the Lorenz-Fitzgerald contraction .
Many pathways are involved in the abnormal proliferation and contraction of the smooth muscle cells of the pulmonary arteries in patients with pulmonary arterial hypertension .	Three major pathways are involved in abnormal proliferation and contraction of the smooth-muscle cells of the pulmonary artery in patients with pulmonary arterial hypertension .
Therefore diagnosis of PAH requires right-sided cardiac catheterization .	Therefore diagnosis of PAH requires a cardiac catheterization .
Diagnosis of PAH requires the presence of pulmonary hypertension .	Diagnosis of PAH requires the presence of pulmonary hypertension with two other conditions .
Pulmonary hypertension can be a severe disease with a markedly decreased exercise tolerance and heart failure .	Depending on the cause , pulmonary hypertension can be a severe disease with a markedly decreased exercise tolerance and right-sided heart failure .
A detailed family history is established to determine whether the disease might be familial .	A detailed family history is taken to determine whether the disease might be familial .
A physical examination is performed to look for typical signs of pulmonary hypertension , including a loud S2 ( pulmonic valve closure sound ) , ( para ) sternal heave , jugular venous distension , pedal edema , ascites , hepatojugular reflux , clubbing etc. .	Physical examination is performed to look for typical signs of pulmonary hypertension including a loud P2 ( pulmonic valve closure sound ) , ( para ) sternal heave , jugular venous distension , pedal edema , ascites , hepatojugular reflux , clubbing etc. .
It was first identified by Ernst von Romberg in 1891 .	It was first identified by Dr Ernst von Romberg in 1891 .
These generally include pulmonary function tests ; blood tests to exclude HIV , autoimmune diseases , and liver disease ; electrocardiography ( ECG ) ; arterial blood gas measurements ; X-rays of the chest ( followed by high-resolution CT scanning if interstitial lung disease is suspected ) ; and ventilation-perfusion ...	These generally include pulmonary function tests , blood tests , electrocardiography ( ECG ) , arterial blood gas measurements , X-rays of the chest ( followed by high-resolution CT scanning if interstitial lung disease is suspected ) , and ventilation-perfusion or V\/Q scanning to exclude chronic thromboembolic pulmon...
The U.S. FDA approved Sildenafil , a selective inhibitor of cGMP specific phosphodiesterase type 5 ( PDE5 ) , for the treatment of PAH in 2005 .	Sildenafil , a selective inhibitor of cGMP specific phosphodiesterase type 5 ( PDE5 ) , was approved for the treatment of PAH in 2005 .
Because pulmonary hypertension can be of five major types , a series of tests must be performed to distinguish pulmonary arterial hypertension from venous , hypoxic , thromboembolic , or miscellaneous varieties .	Because pulmonary hypertension can be of 5 major types , a series of tests must be performed to distinguish pulmonary arterial hypertension from venous , hypoxic , thomboembolic , or miscellaneous varieties .
Epoprostenol ( synthetic prostacyclin , marketed as Flolan ) is given via continuous infusion that requires a semi-permanent central venous catheter .	Epoprostenol ( synthetic prostacyclin , marketed as Flolan ® ) is given via continuous infusion that requires a semi-permanent central venous catheter .
The dual ( ETA and ETB ) endothelin receptor antagonist bosentan ( marketed as Tracleer ) was approved in 2001 .	The dual ( ETA and ETB ) endothelin receptor antagonist bosentan ( marketed as Tracleer ® ) was approved in 2001 .
Normal pulmonary arterial pressure in a person living at sea level has a mean value of 8-20 mm Hg ( 1066-2666 Pa ) at rest .	Normal pulmonary arterial pressure in a person living at sea level has a mean value of 12-16 mm Hg ( 1600-2100 Pa ) .
Although pulmonary arterial pressure can be estimated on the basis of echocardiography , pressure measurements with a Swan-Ganz catheter through the right side of the heart provides the most definite assessment .	Although pulmonary arterial pressure can be estimated on the basis of echocardiography , pressure sampling with a Swan-Ganz catheter provides the most definite measurement .
Treprostinil ( Remodulin ) can be given intravenously or subcutaneously , but the subcutaneous form can be very painful .	Treprostinil ( Remodulin ® ) can be given intravenously or subcutaneously , but the subcutaneous form can be very painful .