Catecholamines are water-soluble and are 50 %- bound to plasma proteins, so they circulate in the bloodstream.

Catecholamines are produced mainly by the chromaffin cells of the adrenal medulla and the postganglionic fibers of the sympathetic nervous system.

Catecholamines will also cause peripheral vasoconstriction, which causes increased systemic vascular resistance and ensures that core organs are adequately perfused.

Catecholamines derive from the amino acid tyrosine.

Catecholamines and their metabolites include dopamine, homovanillic acid ( HVA ), and / or vanillylmandelic acid ( VMA ).

Catecholamines cause general physiological changes that prepare the body for physical activity ( fight-or-flight response ).

Catecholamines have the distinct structure of a benzene ring with two hydroxyl groups, an intermediate ethyl chain, and a terminal amine group.

Catecholamines have a half-life of a few minutes when circulating in the blood.

Catecholamines will increase the heart rate and increase the strength of ventricular contraction, directly increasing cardiac output.

The results of present observations of the thermal radio emission of the moon are consistent with the very low thermal conductivity of the surface layer which was derived from the variation in the infrared emission during eclipses ( e.g., Garstung, 1958 ).

From an estimated mass of 25 g for a zero-magnitude meteorite, the other masses are derived with the assumption of a mass decrease by a factor of 2.512 for each unit increase in magnitude.

The figures in the next-to-last column are derived with the assumption of 50 per cent shielding by the Earth ; ;

The data presented are derived almost entirely from X-ray diffraction measurements and include atomic coordinates, cell dimensions, and atomic and ionic radii.

All the other force vectors are derived from these.

The order of the books ( or the teachings from which they are composed ) is not certain, but this list was derived from analysis of Aristotle's writings.

In the Ancient Macedonian language ( pella ) means stone, and some toponyms are derived from this word: ( Pella: capital of Ancient Macedonia ), ( Pellini-Pallini ).

Some of their features are primitive while others are derived.

The test statistics of this derived linear model are closely approximated by the test statistics of an appropriate normal linear model, according to approximation theorems and simulation studies.

There are dozens of alphabets in use today, the most common being the Latin alphabet ( which was derived from the Greek ).

The most widely accepted one suggests it was derived from the Sinhala henakandaya since the phonetic sounds are very similar.

This is because words in Semitic languages are formed from a root consisting of ( usually ) three consonants, the vowels being used to indicate inflectional or derived forms.

They are derived from the characteristics of their spectroscopic lines: sharp, principal, diffuse, and fundamental, the rest being named in alphabetical order ( omitting j ).

# the hydrogen-like atomic orbitals are derived from the exact solution of the Schrödinger Equation for one electron and a nucleus.

The Latin-derived form of the word is " tecnicus ", from which the English words technique, technology, technical are derived.

Adjectives derived from " United States " ( such as United Statesian ) are awkward in English, but similar constructions exist in Spanish ( estadounidense ), Portuguese ( estado-unidense, estadunidense ), Finnish ( yhdysvaltalainen: from Yhdysvallat, United States ), as well as in French ( états-unien ), and Italian ( statunitense ).

# KeyExpansion — round keys are derived from the cipher key using Rijndael's key schedule

Between the Cotton Belt and the Tennessee Valley is the mineral region, the Old Land area — a region of resistant rocks — whose soils, also derived from weathering in silu, are of varied fertility, the best coming from the granites, sandstones and limestones, the poorest from the gneisses, schists and slates.

Closely related and even more numerous are amides derived from primary amines ( R ' NH < sub > 2 </ sub >) with the formula RC ( O ) NHR '.

Amides are also commonly derived from secondary amines ( R ' RNH ) with the formula RC ( O ) NR ' R.

The name of Germany and the German language, in French, Allemagne, allemand, in Portuguese Alemanha, alemão, in Spanish Alemania, alemán, and in Welsh ( Yr ) Almaen, almaeneg are derived from the name of this early Germanic tribal alliance.

The first deposit on the wall of a cavity, forming the " skin " of the agate, is generally a dark greenish mineral substance, like celadonite, delessite or " green earth ", which are rich in iron probably derived from the decomposition of the augite in the enclosing volcanic rock.

Their most widely known ethnonym is derived from the word ainu, which means " human " ( particularly as opposed to kamui, divine beings ), basically neither ethnicity nor the name of a race, in the Hokkaidō dialects of the Ainu language ; Emishi ( Ebisu ) and Ezo ( Yezo ) ( both ) are Japanese terms, which are believed to derive from another word for " human ", which otherwise survived in Sakhalin Ainu as enciw or enju.

This is puzzling to an outsider conscious of the classic tradition of liberalism, because it is clear that these Democrats who are left-of-center are at opposite poles from the liberal Jefferson, who held that the best government was the least government.

At least a dozen men, some armed, are never far away from him.

Now let us imagine a wing of B-52's, on alert near their `` positive control ( or fail-safe ) points '', the spots on the map, many miles from Soviet territory, beyond which they are forbidden to fly without specific orders to proceed to their targets.

Unless all gadgets are properly operated -- and the wires and seals from the handles removed first -- no damage can be done.

The line of an eyebrow, the color of the skin, a ghazal from Hafiz, the purity of spring water, the long afternoon among the boughs which crowd the upper story of a pavilion -- these things are noticed, judged, and valued.

If his dancers are sometimes made to look as if they might be creatures from Mars, this is consistent with his intention of placing them in the orbit of another world, a world in which they are freed of their pedestrian identities.

We get some clue from a few remembrances of childhood and from the circumstance that we are probably not much more afraid of people now than man ever was.

In fact, insofar as science generates any fear, it stems not so much from scientific prowess and gadgets but from the fact that new unanswered questions arise, which, until they are understood, create uncertainty.

Apart from the categorical imperative they derive from the metaphysics of the orgasm, the only affirmation they are capable of making is that art is their only refuge.

The central concern of Erich Auerbach's impressive volume called Mimesis is to describe the shift from a classic theory of imitation ( based upon a recognition of levels of truth ) to a Christian theory of imitation in which the levels are dissolved.

The same command is repeated as many times as there are levels in rank from general to corporal.

So all-important are ideas, we are told, that persons successful in business and happy in social life usually fall into two classes: those who invent new ideas of their own, and those who borrow, beg, or steal from others.

Man, we are told, is endowed with reason and is capable of distinguishing good from bad.

Only by means of an intensive preoccupation with the detailed considerations following from any decision can he ensure attention to the practical details to be dealt with if the implications of immorality in the major decision are effectively to be checked.

These ways are absolutely irreconcilable because they offer two different recipes for man's redemption from chaos.

Its ontological status is itself most tenuous because apart from individual men, who are its `` matter '', tradition, the `` form '' of society exists only as a shared perception of truth.

The problem is rather to find out what is actually happening, and this is especially difficult for the reason that `` we are busily being defended from a knowledge of the present, sometimes by the very agencies -- our educational system, our mass media, our statesmen -- on which we have had to rely most heavily for understanding of ourselves ''.

Second, our military missile program, going forward so successfully, does not suffer from our present lack of very large rocket engines, which are necessary in distant space exploration.

The student of ideas and their place in history will always be concerned with the patterns of transition, which are at the same time patterns of transformation, whereby ideas pass from one area of activity to another.