isomerization

Definitions

  • WordNet 3.6
    • n isomerization the conversion of a compound into an isomer of itself
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Century Dictionary and Cyclopedia
    • n isomerization In chem., the production of isomeric forms of a given substance or class of substances.
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Usage

In literature:

It is in such cases that isomerism is observed to occur.
"A History of Science, Volume 4(of 5)" by Henry Smith Williams
To such substances the term Isomeric (from 1/ao1/ equal and aei1/o1/ part) is applied.
"Familiar Letters of Chemistry" by Justus Liebig
The artificial alkaloid paraconine, isomeric with the natural conine, will be referred to later.
"Scientific American Supplement, No. 415, December 15, 1883" by Various
A Bibliography of Geometrical Isomerism.
"Scientific American Supplement, No. 832, December 12, 1891" by Various
Further, the allotropic modifications of elements and the isomerism of compounds increased the difficulties.
"Scientific American Supplement, No. 643, April 28, 1888" by Various
C. in a sealed tube for two hours, it becomes an isomeric compound, boiling at 175 deg.
"Scientific American Supplement, No. 711, August 17, 1889" by Various
More than one hypothesis has been proposed to account for these cases of isomerism, but no one has shown itself to be entirely satisfactory.
"Scientific American Supplement, No. 633, February 18, 1888" by Various
The constitution of the isomeric diazo hydroxides has given rise to much discussion.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 4" by Various
Many substitution derivatives are known: the monosubstitution derivatives being capable of existing in three isomeric forms.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 5" by Various
There are also isomeric quinones of the naphthalene series known as naphthaquinones.
"Coal" by Raphael Meldola
Below the temperatures G and H, isomeric transformation does not occur in measurable time.
"The Phase Rule and Its Applications" by Alexander Findlay
It corresponds to tartaric acid, and, like this substance, it occurs in four stereo-isomeric forms.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 7" by Various
It is therefore isomeric with the hydrocarbon of caoutchouc and with that of oil of turpentine.
"Encyclopaedia Britannica, 11th Edition, Volume 12, Slice 6" by Various
Or how is it that even isomeric compounds may exhibit different qualities?
"A Review of the Systems of Ethics Founded on the Theory of Evolution" by C. M. Williams
A further distinction is necessary to a survey of the subdivisions of isomerism regarded in its widest sense.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 8" by Various
Berzelius cited these acids as examples of compounds which are ISOMERIC.
"Smithsonian Institution - United States National Museum - Bulletin 240" by Anonymous
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In news:

Arrestin Translocation Is Stoichiometric to Rhodopsin Isomerization and Accelerated by Phototransduc.
Saccharide Isomerate to Deeply Hydrate Skin and Scalp.
Saccharide Isomerate to Deeply Hydrate Skin and Scalp CosmeticsAndToiletries.com.
Metabolism of Trans and Cis Fatty Acid Positional Isomers Compared to Non-Isomeric Fatty Acids.
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In science:

An examination of the motion of ionic tra jectory seen as a movie indicates that isomerization (Fig. 8(a)) is responsible for the weak peak.
The electronic structures, the equilibrium geometries and finite temperature properties of Na_n (n=39-55)
The δrms in Fig. 7(b) shows the effect of isomerization around 160 K.
The electronic structures, the equilibrium geometries and finite temperature properties of Na_n (n=39-55)
Thus it is difficult to identify a definite melting temperature. A similar behavior is also seen in that of Na52 except for the small peak seen 180 K due to isomerization (Fig. 12(c)).
The electronic structures, the equilibrium geometries and finite temperature properties of Na_n (n=39-55)
Either the transition must populate an isomeric excited state with a subsequent electromagnetic de-excitation, or the final state needs to be unstable in order to provide a coincidence tag to discriminate against background events such as ES signals and radioactive decays.
Astrophysical Neutrino Telescopes
Another recent result is that the isomerization of H2CO and CH3OH, in particular the shifting of a D atom from one side of the molecule to another, appears inefficient (Osamura et al. 2004).
The chemistry of high-mass star formation
Leermakers et al. used similar ideas to study self-assembled bilayers composed of polymer chains with random-walk and RIS (Rotational Isomeric State) statistics [ 205].
Biological and synthetic membranes: What can be learned from a coarse-grained description?
Protons from the 184-cyclotron directed on a tantalum target created the isotopes. “The bombardment of tantalum with protons of energy 10 to 70 Mev has led to the characterization of five new radioactive isotopes of wolfram.” Wilkinson counted the observation of an isomeric state in 179W as the fifth isotope.
Discovery of the Tungsten Isotopes
The existence of the isomeric state has not been confirmed.
Discovery of the Barium Isotopes
However, because this value is almost a factor of two larger than the accepted value and closer to the claimed isomeric state, it is likely that the state had been misidentified.
Discovery of the Barium Isotopes
Although the latter process it known to occur, the former is much more probable and favors the assignment to Ba133 .” The observed half-life of this isomeric state agrees with the present value of 38.9(1) h.
Discovery of the Barium Isotopes
The superscripts t, g and m for 26Al refer to the total, ground state and isomeric state rate, respectively. b Reaction Q-value from Audi, Wapstra and Thibault , unless noted otherwise.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
Comments: Altogether, 82 resonances at energies of Ecm r = 37− 1761 keV are taken into account in calculating the total reaction rates for the formation of either the ground or isomeric 26Al state.
Charged-Particle Thermonuclear Reaction Rates: II. Tables and Graphs of Reaction Rates and Probability Density Functions
For exotic nuclei with production rates between about 1 per second and 1 per hour it is possible to study the gamma-decay of excited states populated either in the radioactive decay of the mother nucleus or in the decay of a long-lived isomeric state populated in the production reaction of the exotic nucleus.
New magic numbers
To resolve this, we have proposed a method of extracting sensitivity to α-variation using direct laboratory measurements of the change in nuclear mean-square charge radius between the isomers (isomeric shift) .
Astronomical and laboratory searches for space-time variation of fundamental constants
In view of the procedure used to obtain this isotope, it is identified as Tl189 .” This half-life corresponds to an isomeric state.
Discovery of the thallium, lead, bismuth, and polonium isotopes
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