How To Use Isomer In A Sentence

Similarly, in ketosteroid isomerase, Asp99 may catalyze proton transfers in the Asp38Ala variant [ PLoS Biology: New Articles
Of the three classes of isomeric anhydrides which can be formed from hydroxybenzoic acids, the chemistry of the natural tannins is only concerned with the class comprising the ester anhydrides. Synthetic Tannins
Therefore a ring opening step will be the first step catalyzed by isomerases for any pentose or hexose substrate. Irwin Rose - Autobiography
For example, the two substances called butyric acid and acetic ether are isomeric bodies. Religion and Chemistry
An aromatic molecule containing two nitro groups will have three positional isomers.

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Trichloroethylene, dihydroxybenzoates, benzene chlorobenzene, toluene, phenol and chlorophenylacetate isomers do not serve as substrates [2]; very broad substrate specificity [3]) [2, 3] P? Recently Uploaded Slideshows
Perhaps the most famous creation of an isomeric compound was Wöhler's accidental synthesis of urea in 1828, when he was attempting to prepare ammonium cyanate (which he later succeeded in preparing by allowing the crystals to form at room temperature instead of by evaporating the solution). Wöhler, Friedrich
Most importantly, stereoisomers are not spatially superimposable.
Not only is manufactured CLA not as good as natural, some of the factory-made stuff is in an isomeric form that has been shown to be detrimental to health. Conjugated linoleic acid (CLA) and breast milk | The Blog of Michael R. Eades, M.D.
Further, the broken site at the TT4 gene contained a potential topoisomerase I cleavage site.
The region includes genes encoding a CoA-dependent methylmalonate semialdehyde dehydrogenase (dntE), a putative NADH-dependent dehydrogenase (ORF13), and a bifunctional isomerase/hydrolase (dntG). Casey Luskin on Kitzmiller & Information
As shown in Table 1, isomerases that are specific for 2R-aldoses were found to activate the 1-R proton of the ketose produced. Irwin Rose - Autobiography
A heart-shaped molecular donut, the topoisomerase II dimer boasts an electropositive tunnel, the likely passage point for DNA.
The anomeric specificities of 5 isomerases were determined in the course of our studies on the isomerases that continued until 1973. Irwin Rose - Autobiography
This meant that the ‘total synthesis’ would have produced a mixture of isomers requiring painstaking separation.
The change adiabatic temperature was small during coupling isomerization with aromatization of hexene - 1 , because both re.
Topoisomerase III is a type I topoisomerase, acting on DNA that is negatively supercoiled and/or contains single-strand regions.
The structural and thermodynamic features of these stereoisomeric adducts are also discussed in relation to their reported low susceptibilities to nucleotide excision repair.
On applying this law to the case of two isomeric benzil derivatives, the molecular weights were found, as expected, to be identical, and not multiples; hence Prof. Meyer is perfectly justified in introducing the necessary modification in the "position in space" theory. Scientific American Supplement, No. 643, April 28, 1888
It was there I got my introduction to optical isomerism and the tetrahedral carbon atom. William S. Knowles - Autobiography
In 1907, he synthesized a pair of geometric isomers that confirmed his predictions.
The enzyme catalyzing this reaction is phosphohexose isomerase (also known as phosphoglucose isomerase).
When we dissolved CpdA in PBS (pH = 7.6) or Tris-HCl buffer (pH = 7.6) rapid formation of two reaction intermediates occurred, which we could identify as the isomeric forms of N-methyl-2 - (4-acetoxyphenyl) - aziridine ( PLoS ONE Alerts: New Articles
Such isomers are called enantiomers and molecules that have enantiomers are said to be chiral or to show chirality.
Some new groups are defined in order to use UNIFAC equation to describe the isomer systems.
Isomerization and alkylation of saturated hydrocarbons to provide high octane gasoline are of particularly great importance in the petroleum industry. Hydrocarbons for the 21st Century - The Work of the Loker Hydrocarbon Research Institute
One example of the application of this technique is in the distinction of trans and gauche rotational isomers.
There is a striking difference between the smells of limonene's two isomers: (+) limonene has a fresh orange smell whereas (-) limonene smells more like turpentine.
The branched-chain (isomer) paraffins are usually found in heavier fractions of crude oil and have higher octane numbers than normal paraffins. Hydrocarbon chemistry
All these firms have made massive investments in improving the quality of fuel by de-sulphurisation and isomerisation, processes in the refinement of fuel by which its qualityis made better, so that vehicles using it cause minimal pollution. Analysis
“It secretes stereoisomeric protein compounds through a rather unique digestive process.” Daedalus’s Children
In contrast to alpha acids, it is not isomerized beta acids that add bitterness, is the oxidation products of the beta acids, which are bitter and soluble, that make their presence felt. FAQ: The Hops FAQ Revision 3 by Norm Pyle/Mark Garetz and Al Korzonas
These isomers are all considered to be interconverted in humans, and may be less hepatotoxic than retinol.
Because the interconversion of the two tautomers is slower than the actual proton transfer reaction, a conformational change is probably associated with the isomerization.
Although these derivatives are not properly nitrofurans, the 2-furylethylene compounds with the nitro group located outside the furan ring are isomers of position of the classical 5-nitrofuran derivatives.
We had been mistakenly unsuccessful in not finding the small amount of transfer that was later detected in the triose P isomerase reaction. Irwin Rose - Autobiography
Such substates result from a local isomerism of strategic residues of the heme pocket.
Hydrocracking also performs isomerization for pour-point control and smoke-point control, both of which are important in high-quality jet fuel. Cracking
It was shown also that the same critical concentration of spermidine induces aggregation and catenation of DNA rings by topoisomerases.
Because isomer weapons would not involve transmutation of nuclear species, they don't come under the rubric of existing nonproliferation treaties.
In 1907, he synthesized a pair of geometric isomers that confirmed his predictions.
When distilled with potassium hydrate it yields quinoline, lutidine, and two isomeric collidines. Scientific American Supplement, No. 415, December 15, 1883
For complex radicals of a certain type he put forward a steric theory - the octahedron theory - which predicted that certain of these compounds must occur in two stereoisomeric forms, a prediction which has been confirmed by experiment. Nobel Prize in Chemistry 1913 - Presentation Speech
Finally, the stereochemistry of stable cyclization products following the isomerization might provide experimental proof as discussed in the following section.
Ampb peptides are a new class of molecules where the photoisomerizable dye azobenzene is linked to the peptide moiety via a flexible methylene spacer.
The stereochemistry of quinine is formidable: it has four chiral centres, and thus 16 stereoisomers - of which only one is the natural ingredient of cinchona bark.
It had been observed by Harland Wood's group at Western Reserve that when 14C-lactate or 14C-glycerol are fed to a fasted animal the labeling of the glucose units of liver glycogen was such as to suggest that triose-P isomerase had failed to equilibrate its two triose phosphate substrates during synthesis, or that the condensation reaction of FDP aldolase did not give equal labeling of the two halves of Irwin Rose - Autobiography
It is, however, the wrong stereoisomer mirror image - this no links thing is getting really annoying; isn't this the point of comment moderation? Mind Hacks: Drug tampering for fun and profit
As the chromophore is a polyene, there are several double bonds capable of isomerization.
But although government agencies now admit that neurotoxins - for example isomers of tri-cresyl phosphate - are present in these fumes, they claim their quantities pose no threat to health. HEADLINES
This study illuminates some of the similarities and differences in the topoisomerase / DNA complex in eukaryotes and prokaryotes.
The authors concluded that this isomerism could explain the differential biological effects of CHH (hyperglycemia and molt-inhibition).
IBUs are the parts per million of isomerized chemically reconfigured alpha acids. Hey Barkeep! Can I Get A Beer Without Any Of These Hops That Everyone Seems So Keen On?
Ordinary corn syrup is treated with the enzyme glucose isomerase which converts glucose to fructose.
It is during this time that virtually insoluble alpha acids are isomerized FAQ: The Hops FAQ Revision 3 by Norm Pyle/Mark Garetz and Al Korzonas
The stereospecificity was also decreased, as L384A formed the R and S isomers of 10-HPODE and 8-HPODE in a 3: 2 ratio. Journal of Biological Chemistry current issue
It operates effectively at a much more basic level - that of characteristic intervals and gestures, particularly the downward major sixth and (its isomer) the upward minor third.
After several trials, the researchers determined that nickel catalysts, which share similar properties to palladium materials, allowed the α-ketoesters to add to nitroalkenes with high yields and purity; over 90% of the final product corresponded to a specific stereoisomer, a molecule with a hard-to-achieve, geometrically distinct structure. R&D Mag - News
The adduct 6 was a single diastereoisomer while 5 was a mixture of diastereoisomers.
All operations were carried out on ice under a dim green safe light to prevent photodegradation, isomerization and structural changes of the pigments.
Conjugated linoleic acid is a mixture of positional and geometric isomers of linoleic acid.
Reforming represents the total effect of numerous reactions such as cracking, polymerization, dehydrogenation, and isomerization taking place simultaneously (Figure 9). Cracking
A single enzyme molecule can make many millions of single isomer product molecules per minute in a chemical reactor.
Both topoisomerase I and RNA polymerase II reactivity occurs in the minor groove of DNA.
The mutation results in loss of RAD51 focus formation in response to DNA damage and in increased cellular sensitivity to the DNA interstrand cross-linking agent mitomycin C and the topoisomerase-1 inhibitor camptothecin. Naturejobs - All Jobs
The value for the ancestor was expressed relative to the midpoint topoisomer of plasmid that was completely relaxed by using calf-thymus topoisomerase I and assigned = 0.
A heart-shaped molecular donut, the topoisomerase II dimer boasts an electropositive tunnel, the likely passage point for DNA.
Because of its intense sweetness, the R, R stereoisomer in particular should be economically competitive compared to other high intensity sweeteners. FoodAndDrinkEurope RSS
Many forms of D. dumetorum contain a convulsant alkaloid which is a mixture of stereoisomers of dihydrodioscorine. Chapter 37
In the absence of DNA, only two photoproducts (cis and trans isomers) were detected for all compounds.
The article proclaimed the dawn of the age of atomic aircraft powered by hafnium-178 isomer reactors.
The results reveal that metal cation binding affects the protein conformation, the retinal isomeric composition as well as lipid head groups.
Such isomers are called enantiomers and molecules that have enantiomers are said to be chiral or to show chirality.
There are two possible arrangements of the atoms in the butyl group, which means there are two isomers: n-butyl and isobutyl.
But ultraviolet light converts the molecule to the cis isomer, in which both propellers are on the same side.
An example that Blackmond often uses is the asymmetric hydrogenation of the allylic alcohols geraniol and its isomers (g geraniol and nerol) carried out while she was at Merck.
In this Topic, we will concentrate on stereoisomerism in organic compounds, although this phenomenon also occurs in other compounds such as transition metal complexes.
Other arguments are drawn from chemistry, especially from the facts of isomerism, polymerism, and allotropism. The Catholic Encyclopedia, Volume 4: Clandestinity-Diocesan Chancery
When G6P was used with isomerase in D2O the colorimetric analysis for fructose-6-P passed through a maximum before reaching a final value. Irwin Rose - Autobiography
However, after isomerization, the planarity is lost, presumably due to intermolecular effects as well as steric hindrance between the carbonyl oxygen and the aromatic ring atoms.
This domain, which is not found in eukaryotic topoisomerases, might be involved in the bending and right-handed wrapping of DNA observed for both Gyrase and Topo IV.
In nature, the function is performed by the enzyme triose phosphate isomerase.
The plant material contains only the active isomers.
The various CLA are produced in the rumen of ruminant animals mainly by the bacteria Butyrivibrio fibrisolvens through reactions of isomerization and biohydrogenation. Conjugated linoleic acid (CLA) and breast milk | The Blog of Michael R. Eades, M.D.
Reforming represents the total effect of numerous reactions such as cracking, polymerization, dehydrogenation, and isomerization taking place simultaneously (Figure 9). Cracking
I don't know if anything besides hops have alpha acids - if they did and they become isomerized, IBU tests would measure them. Hey Barkeep! Can I Get A Beer Without Any Of These Hops That Everyone Seems So Keen On?
Each molecule blend, each dimer and isomer, will have different properties. The Volokh Conspiracy » A Step Toward Sanity on Medical Marijuana
To get any kind of explosion, start with the hafnium isomer 178m2. Knight Rider: Because Hafnium is better than none-ium
The model reaction using ethanol as probe molecule could be used to characterize the acid function of a support, and thus provide useful instructions in selecting hydroisomerization catalyst supports.
Nuclear isomers are excited states that eventually decay to the ground state, mostly by gamma radiation.
The propyl group exists in two distinct isomeric forms.
Because all amino acids except glycine are chiral, biosynthetic pathways must generate the correct isomer with high fidelity. Are Stereochemical Explanations Causally Sufficient?
The metal ion holds the reacting molecules close together, and may control the stereochemistry of the reaction so that only a particular diastereoisomer is produced.
Perhaps one codon codes for one isomeric form of an amino acid, and another codes for a different isomeric form of the same amino acid. An evolutionary prediction: "Silent" mutations are not always silent - The Panda's Thumb
Among other applications, tungstated zirconia is used to improve the octane content of gasoline through a process called isomerization, in which a straight chain alkane molecule is converted into a branched chain molecule. PhysOrg.com - latest science and technology news stories
The isomerisation unit will allow Baiji to produce a super high-quality fuel that pollutes less. Iraq Updates - Latest News
Enantiomers are stereoisomers whose molecules are nonsuperposable mirror-images of each other.
The glycerol used to make archaeal phospholipids is a stereoisomer of the glycerol used to build bacterial and eukaryotic membranes.
These DNA-binding proteins include polymerases, helicases, nucleases, isomerases, ligases, histones, and others.
As in our system, here again the cis isomer remains photoactive.
They possess a common chromophore, retinal, that upon absorption of light isomerizes and thereby triggers biological functions ranging from light energy conversion to phototaxis and vision.
It realized the isomerism form to have the auto - adapted wireless sensor network long - distance information monitor.
This is tautomerism, where two isomers exist in dynamic equilibrium with each other.
Technetium-99m decays by a process called "isomeric"; which emits gamma rays and low-energy electrons. Radioisotopes in medicine
A stereoisomer can have any chemical properties any other molecule can, relatively unrelated biologically, their general properties will be similar. Design Challenge Results: "Evolution is Smarter than You Are" - The Panda's Thumb
The dextrorotatory isomer of zopiclone is displaced from its salt by means of a base such as sodium hydroxide.
Process for selective hydrogenation of highly unsaturated compounds and isomerization of olefins in hydrocarbon streams
They can, however, be chemically isomerized into the more stable trans-form, thereby creating another range of soft waxes that seem to have considerable commercial potential of their own. 1 Introduction and Summary
All these firms have made massive investments in improving the quality of fuel by de-sulphurisation and isomerisation, processes in the refinement of fuel by which its qualityis made better, so that vehicles using it cause minimal pollution. Analysis
The researchers were not very concerned about the occurrence of fumarate, which is the trans isomer of maleate, because the levels were relatively low.
The practice of identifying a chemical compound only by its composing elements was the norm in chemistry, until the discovery of isomerism by Friedrich Woehler in 1827. Natural Kinds
However, the intensity pattern of these vibrations is very much alike, which points to the same isomeric structure for these photoproducts.
The firm explained that hydrolysis, oxidation, polymerization, isomerization and cyclization are common chemical reactions in frying oil that produce both volatile and nonvolatile compounds. FoodNavigator RSS
Sometimes her brains get a little too big for her Bible: On '' Mary Jane, '' she fails to find a rhyme for '' tetrahydrocannabinol pure isomer dronabinol. '' Tori Amos - Undented
Clopidogrel is the common name of the dextrorotatory isomer of the chemical compound named methyl alpha-5 (4,5,6,7-tetrahydro (3,2-c) thienopyridyl) (2-chlorophenyl) - acetate. Patent Baristas
There is evidence that tocopherol isomers differ from each other in their functional properties.
The evolution of protein disulfide isomerases presents a difficult but important phylogenetic question.
This is carried out by chemical and petrochemical industries in processes such as isomerization, alkylation homologation, etc. Hydrocarbons for the 21st Century - The Work of the Loker Hydrocarbon Research Institute
In unrelated experiments I observed a puzzling phenomenon with G6P isomerase. Irwin Rose - Autobiography
In addition to cracking, catalytic activities include dehydrogenation, hydrogenation, and isomerization. Cracking
However, since the formyl derivatives, especially diformyl derivative, have spectroscopic features similar to those of PpIX, it is difficult to distinguish these isomers from PpIX by spectroscopic means.
It reduced levels of glycolytic enzymes such as hexokinase, phosphoglucoisomerase and aldolase levels, which are increased in hepatoma-bearing rats, and increased levels of gluconeogenic enzymes such as glucose. 6-phosphatase and fructose-I Find Me A Cure
However, several research groups have suggested cis isomers of lycopene are better absorbed than the all-trans form.
It is now known, thanks to the researches of Perkin, Schunck, Roemer, Graebe, and Liebermann, that in the manufacture of artificial alizarin there are produced three distinct coloring matters -- alizarin, iso or anthrapurpurin, and flavopurpurin, the two latter being isomers of purpurin. Scientific American Supplement, No. 286, June 25, 1881
The artificial alkaloid paraconine, isomeric with the natural conine, will be referred to later. Scientific American Supplement, No. 415, December 15, 1883
When G6P was used with isomerase in D2O the colorimetric analysis for fructose-6-P passed through a maximum before reaching a final value. Irwin Rose - Autobiography
However, each set of to occupy those realms by multiple complete physical form into an mand for the regeneration of the bodies can be made to carry a dif - physical embodiments all connected energy form which can be pro - Adamic race and the preparation of ferent nucleic acid template on with one mind. jected to a vehicle or a n environ - the Christ people for n e w worlds which proteins of specific 15 Thus, one mind will transmit ment in the lower heavens where it of creation, a change in biological stereoisomeric forms have been to many bodies as one genetic code can be remodulated into the same life could not now evolve on Earth, synthesized. is used a s the master code for physical form. Recently Uploaded Slideshows
Post-translational aging of proteins in osteoarthritic cartilage and synovial fluid as measured by isomerized aspartate Recently approved feeds from Syndic8.com
The product is manipulated, using a process that includes alpha-amylase, oligosaccharides, and xylose isomerase, into a syrup that is anywhere from 90% fructose/10% glucose to 42% fructose/58% glucose. Sophie Brickman: Why Is It Easier To Buy A Gun Than High-Fructose Corn Syrup?
It has five chiral carbons and only the naturally occurring diastereoisomer is biologically active.
It had been observed by Harland Wood's group at Western Reserve that when 14C-lactate or 14C-glycerol are fed to a fasted animal the labeling of the glucose units of liver glycogen was such as to suggest that triose-P isomerase had failed to equilibrate its two triose phosphate substrates during synthesis, or that the condensation reaction of FDP aldolase did not give equal labeling of the two halves of Irwin Rose - Autobiography
Although there are several ER-localized HSPs that can potentially chaperone PRRs, including calnexin, calreticulin, protein disulfide isomerase, gp96, thiol-oxidoreductase ERp57, and BiP, to date only gp96 has been demonstrated to function in PRR-folding PLoS ONE Alerts: New Articles
However, esters formed from other pentanol isomers amyl alcohols, or mixtures of pentanols, are often referred to as amyl acetate. A Special Message Just for You
As observed in all consequent experiments, both left-handed (L) and right-handed (D) optical isomers were created in a racemic mixture Ambiguity Tolerance
However, the extent of trans isomer was greater in the extracted samples.
An in vitro study showed that the collision between a moving replication fork and a stalled topoisomerase can convert the complex to a nonreversible form.
Trans isomers increase lipoproteina, a non-dietary-related risk of atherogenesis, to levels higher than the corresponding chain-length saturated fatty acid…. Trans Fats
Aconitate isomerase catalyzes the interconversion of cis - and trans-aconitate by a 1, 3 allylic rearrangement that uses the (pro-S) hydrogens of the two substrates. Irwin Rose - Autobiography
The region includes genes encoding a CoA-dependent methylmalonate semialdehyde dehydrogenase (dntE), a putative NADH-dependent dehydrogenase (ORF13), and a bifunctional isomerase/hydrolase (dntG). Casey Luskin on Kitzmiller & Information
Together they provided the first indication of an isomeric state in Carbon Walther Bothe and the Physics Institute: the Early Years of Nuclear Physics
For the pathway of cis-trans isomerization of olefins, we suggest distinguishing conjugated olefins (including stilbenes) of little polarity from other cases.
Sometimes, Mrs. Janner, it is important to remember that life is an isomerism in which the isomers change into one another with great ease so that they ordinarily exist together in equilibrium. Trisomy
The major component is 3,7-dimethyl-1,3-octadien-5-one, which is a monoterpene with two geometrical isomers as shown: Chapter 7
Because all amino acids except glycine are chiral, biosynthetic pathways must generate the correct isomer with high fidelity. Are Stereochemical Explanations Causally Sufficient?
Other effects of the B12 coenzymes are still not easy to explain in detail, particularly the part they play in the isomerisation reactions which led to their discovery. Nobel Lecture The X-Ray Analysis Of Complicated Molecules
However, isomerization of b-G6P occurs at a significant rate. Irwin Rose - Autobiography
In the case just now assumed we arrive at the oxychloride; when, however, the metal and chlorine change places in the water molecule, the isomeric hypochlorous salts are the result. Scientific American Supplement No. 822, October 3, 1891
This is carried out by chemical and petrochemical industries in processes such as isomerization, alkylation homologation, etc. Hydrocarbons for the 21st Century - The Work of the Loker Hydrocarbon Research Institute
As to segregation of replicated daughter molecules, to be discussed later, topoisomerase II is thought to locate DNA crossovers such as those present in catenated molecules.
Taken together, these results indicate that the overexpression of the topoisomerase I gene causes DNA damage that is lethal only in the scaA - background.
This is important because once alpha acids have been oxidized they can no longer be isomerized into iso-alpha acid, thus decreasing the hop's bittering potential. FAQ: The Hops FAQ Revision 3 by Norm Pyle/Mark Garetz and Al Korzonas
This appeal is focused on the question of patentability of this dextrorotatory isomer in view of its known racemate described in earlier Sanofi patents, specifically, Sanofi's Patent Baristas
Slide 18: Cis, Trans Isomerism • trans-cyclooctene is the smallest trans cyclooctene that has been prepared in pure form and is stable at room temperature • the cis isomer is 38 kJ (9.1 kcal) / mol more stable than the trans isomer • the trans isomer is chiral even though it has no chiral center trans Cyclooctene (a pair of enantiomers) 5-18 Recently Uploaded Slideshows
Depending on the location of the side groups and the nature of the starting monomers, linear polymers can have various structural isomers denoted as isotactic, syndiotactic, or atactic.
On the other hand, every chemist knows that it is only the simpler of the carbohydrates which are so individualised as to be connoted by a particular formula in the stereoisomeric system. Researches on Cellulose 1895-1900
However, esters formed from other pentanol isomers amyl alcohols, or mixtures of pentanols, are often referred to as amyl acetate. A Special Message Just for You
The stereochemistry of quinine is formidable: it has four chiral centres, and thus 16 stereoisomers - of which only one is the natural ingredient of cinchona bark.
The enzyme catalyzing this reaction is phosphohexose isomerase (also known as phosphoglucose isomerase).
In addition, the reaction mechanism of bond isomerization of butene catalyzed by HF has been investigated.
B fork the deterministic isomer generator back to the CDK Things to do...
Other categories include transferases, oxidoreductases, ligases, lyases, isomerases, proteases, molecular chaperons, and GTPases.
I thought it as well, therefore, to recommence the study of daturine, the more so as I had already determined the incorrectness of the long accepted point of fusion of atropine, and that my researches on hyoscyamine convinced me that this base is an isomer of atropine, although very analogous to it. Scientific American Supplement, No. 324, March 18, 1882
In nonpolar polyenes the lowest-lying funnel corresponds to a 3 kink with both double and adjacent single bonds twisted, which may initiate hula-twist isomerization.
To illustrate some of the features of the equilibrium phenomenon, let us look at the reaction in which cyclobutene is isomerized to 1.3-butadiene.
The chemist is acquainted with numerous groups of substances which we call isomeric compounds, and two substances are said to be isomeric when they not only consist of the same elements united in the same proportions, but also have the same density in the state of vapor, so that according to the molecular theory their molecules must have the same weight. Religion and Chemistry
[Greek: b] - digallic acid, one of two dibasic isomers having the composition -- Synthetic Tannins
Among the genes affected by supercoiling are the topoisomerase genes.
So storing energy in a hafnium isomer is one thing. Knight Rider: Because Hafnium is better than none-ium
As tartaric acid possesses two stereogenic carbon atoms, it exists in three stereoisomeric forms.
Nuclear isomers are excited states that eventually decay to the ground state, mostly by gamma radiation.
It has an asymmetric carbon atom and therefore has levo and dextro isomers but is supplied as a racemic mixture for anesthetic use.
Initially the propellers sit on opposite sides of the molecule: the so-called trans isomer.
The $45 million contract for Czech company Chemoprojekt, Czech Design, Engineering and Contracting Company to install an isomerisation unit is half completed and will be concluded in 2010, Ubaidi said. Iraq Updates - Latest News
Currently, technical proposals are being reviewed for the construction of three units: a 32,000 bbl/d continuous catalytic reformer (CCR) unit; a 27,000 bbl/d isomerization unit; and a 62,000 bbl/d hydrotreater. Energy profile of Iran
Several cannibinoids will isomerize in a non reducing environment below 140 degrees C (which molten butter will be - the water not only keeps the butter from scorching it also keeps temperture below boiling). Firedoglake
Down-regulated topoisomerase II gene expression in etoposide-selected cells has also been shown to be associated with an increased rate of spontaneous polyploidization.
Sommelet rearrangements as well as intra-anionic ether isomerisation. Georg Wittig - Curriculum Vitae
The region includes genes encoding a CoA-dependent methylmalonate semialdehyde dehydrogenase (dntE), a putative NADH-dependent dehydrogenase (ORF13), and a bifunctional isomerase/hydrolase (dntG). Casey Luskin on Kitzmiller & Information
Depending on the location of the side groups and the nature of the starting monomers, linear polymers can have various structural isomers denoted as isotactic, syndiotactic, or atactic.
The word isomerism was coined by Berzelius to express this anomalous condition of things, which seemed to negative the most fundamental truths of chemistry. A History of Science: in Five Volumes. Volume IV: Modern Development of the Chemical and Biological Sciences
DNA topoisomerase I may play a major role in transcription; the enzyme is physically associated with actively transcribed regions of chromatin where it reduces torsional stress generated during transcription.
These DNA-binding proteins include polymerases, helicases, nucleases, isomerases, ligases, histones, and others.
The precipitated diastereoisomer was pressed out and washed with approx.20 l of ice-cold 2-propanol.
= -- Numerical inequality in the case of the pistil, as compared with the other whorls of the flower, is of such common occurrence, under ordinary circumstances, that in some text-books it is looked on as the normal condition, and a flower which is isomerous in the outer whorls is by some writers not considered numerically irregular if the number of the carpels does not coincide with that of the other organs. Vegetable Teratology An Account of the Principal Deviations from the Usual Construction of Plants
AdoMet can exist in two diastereoisomeric states with respect to its sulfonium ion. Vimeo / Recent Public Videos
Even in his earlier investigations into certain metal ammonias he was able to show that numerous cases of isomerism in complex cobalt and platinum compounds could only be satisfactorily explained by steric approach. Nobel Prize in Chemistry 1913 - Presentation Speech
In nature, the function is performed by the enzyme triose phosphate isomerase.
After photoisomerization, a bathochromic (red-shifted) intermediate, called K, forms in 3 ps.
Structural isomerism is not a form of stereoisomerism, and is dealt with on a separate page.
For instance, in the case of the two active stereoisomers we showed that only the stereochemistry at the amine and hydroxyl functions on the scaffold were important - the third chiral centre is not.
However, significant differences in the structure of the two linked channels, which arise from a different orientation of the two stereoisomeric forms of the dioxolane ring with respect to the axis of the pore, were identified.
Chrisomer literally means an infant buried in its baptism robe (chrisom).
Thalidomide, for instance, is a powerful, safe anti-nausea drug, but it’s stereoisomer causes nasty birth defects. Design Challenge Results: "Evolution is Smarter than You Are" - The Panda's Thumb
The second major type of isomerism is stereoisomerism.
It plans to install a 1. 8-million tonnes a year or 40,700 bpd diesel hydrotreater to produce Euro IV-compliant diesel and 140,000 tonnes or 3,910 bpd isomerisation unit to produce blending component to improve petrol specifications by mid-2010. Moneycontrol Top Headlines
Phosphoglucose isomerase is a protein with multiple functions.
The phenomenon of isomerism is often regarded as a success for atomism.
The majority of quantitative reports have involved azobenzene, styryl or thioindigo structures, which undergo a cis-trans isomerization when photolyzed.
< 1, 3 > [2, 3] S Additional information (molecular mechanism of intracellular degradation of type I collagen in normal corneal endothelial cells, role of the enzyme and protein-disulfide isomerase, which is the b subunit of the enzyme, during procollagen I biosynthesis [72]) [72] P? Recently Uploaded Slideshows
Differ in the way in which the atoms within the molecule are oriented in space are called stereoisomer .

How To Use Isomer In A Sentence

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