How To Use Double bond In A Sentence
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In this process some remaining double bonds are flipped from the natural cis configuration to a trans configuration, which imparts the serum cholesterol elevating properties.
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Due to their double bonds they possess negative electrical charges.
Fats, Nutrition and Health
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One example of the use of hydrogen atom transfer in organic synthesis is hydrogenation, i.e. the addition of hydrogen to a carbon-carbon double bond.
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Organic sulfates are esters and are formed by reacting an alcohol with cold sulfuric acid or by the reaction of sulfuric acid with a double bond in an alkene.
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These two molecules cannot be easily interconverted because of the high energy required to rotate a double bond.
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Many nucleophilic additions to carbon-oxygen double bonds are reversible, and the equilibrium position of the reaction determines the overall results.
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The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds.
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27 This causes the hydrogen beyond this present threshold as the Iife form is moved into the lar density level will have to be - double bonds to break and create a where we have been kept by the next phase of the electromagnetic come less dense a n d grow more cyclobutane ring between t h e di - old solar paradigm of Power, spectrum.
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Benzene is planar and has an uninterrupted cyclic array of three conjugated double bonds arranged in a monocyclic six membered ring.
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The type of cyanate ester resin (CE) and its modification by thermosetting, thermoplastics, rubber elastomer and unsaturated compound with double bond are reviewed.
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Fading occurs when any chemical process breaks the sequence of conjugated double bonds constituting the chromophore - the dye moiety that imparts colour.
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This involves the addition of hydrogen to the carbon chain thereby removing the double bonds and producing hydrogenated vegetable oils.
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The alkene carbon-carbon double bond is made from two sp trigonally hybridized carbons.
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Recently we used this method to study the effect of conjugated double bonds in lipid acyl chains on phase behavior and membrane architecture of die lipids.
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Alkanes (sometimes called paraffins) have only single bonds, while alkenes (sometimes called olefins) have a carbon-carbon double bond, and alkynes have a carbon-carbon triple bond.
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The formation of conjugated dienes occurs when free radicals attack the hydrogens of methylene groups separating double bonds and leading to a rearrangement of the bonds.
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Particular attention was given to the family of chlorins that differ from porphyrins only by saturation of a peripheral double bond of the macrocycle.
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The double bond positions of 11 conjugated trienes were unambiguously located through a simple derivatization method amenable to nanogram-scale analyses.
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Recently we used this method to study the effect of conjugated double bonds in lipid acyl chains on phase behavior and membrane architecture of die lipids.
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Oxidation of an aldehyde breaks the double bond within the carbonyl group to give a carboxylic acid.
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One highly characteristic reaction of aldehydes and ketones is nucleophilic addition to the carbon-oxygen double bond.
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The presence of a double bond at position C-2-3 in the flavone and flavonol aglycones, a keto group at C-4, B ring hydroxylation and/or a free hydroxyl group at C-3 may be associated with activity.
Wil's Ebay E-Store
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In common with all unsaturated hydrocarbons hydrogen can be added across the double bond to produce ethane.
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Organic sulfates are esters and are formed by reacting an alcohol with cold sulfuric acid or by the reaction of sulfuric acid with a double bond in an alkene.
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Cycloadditon of one of the double bonds on either the furan or the pyrone ring of a psoralen molecule forms a monoadduct.
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Secondary alcohols can be readily recovered from ketones by breaking the double bond between the oxygen and carbon and adding hydrogen.
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The photoisomerization of C = C double bond is the basic subject of photochemistry.
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These data confirm that cycloaddition occurs between the 8,9-double bond of HFQ and the 5,6-double bond of thymine.
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Ozone attacks a carbon-carbon double bond, initially making an ozonide, a hair-raising five-membered ring that has three oxygens in a row.
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The functional group of an alkene is its carbon-carbon double bond.
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The interatomic distances in the inner ring of factor VIa, which has been called the corrin ring, conform very closely with the distances proposed 12 for a structure containing six resonating double bonds, so closely as to leave almost no doubt of the correct formulation of its chemical structure (cf.Fig. 9).
Nobel Lecture The X-Ray Analysis Of Complicated Molecules
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Ozone is a strong electrophilic reagent which can attack the double bond found in alkenes.
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Greater reductions occur when cis double bonds are located near the middle of the acyl chains.
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Where they are on opposite sides of the double bond, the arrangement is the trans arrangement.
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One of the olefinic bonds in isoprene also has a methyl group associated with it, and this alkylation alters the electron distribution of the double bond and makes it more reactive.
Archive 2007-08-01
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Moreover, computational docking suggested that the substrate-binding channel binds a polyene substrate that contains a single cis double bond at the C4 / C5 position, raising the possibility that the C4 = C5 double bond in the enediyne moiety could be generated by the iterative polyketide synthase.
Journal of Biological Chemistry current issue
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By one-step epoxidation of double bond in the side chain of cardanol, epoxy-cardanol has been synthesized, which may interact with diethylene triamine to form amino-cardanol.
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The principal reason for this is the unsaturated nature of the alkene that allows the double bond to polymerize and to participate in many other reactions that the saturated alkanes cannot.
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The alkene carbon-carbon double bond is made from two sp trigonally hybridized carbons, where one of the carbon-carbon bonds is a sigma bond (along the internuclear line) and the other is a pi bond (with side to side bonding).
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Various brews can give you color indicators for the presence of double bonds, methyl ketones, aldehydes and the like.
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Due to their double bonds they possess negative electrical charges.
Fats, Nutrition and Health
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Diene elastomers can be recognized by the presence of double bonds in the main chains of the macromolecular molecules.
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Fading occurs when any chemical process breaks the sequence of conjugated double bonds constituting the chromophore - the dye moiety that imparts colour.
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As the chromophore is a polyene, there are several double bonds capable of isomerization.
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They also rejected bridgehead double bonds and allenes, and (to my surprise) only allowed triple bonds for nitriles (so no acetylenes.)
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Diene elastomers can be recognized by the presence of double bonds in the main chains of the macromolecular molecules.
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They react by adding other chemical agents at the double Bond to form derivatives or polymers.
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It was suggested that the formation of the epoxides was due to the reactivity of singlet oxygen with double bonds.
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Ozone is a strong electrophilic reagent which can attack the double bond found in alkenes.
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Due to their double bonds they possess negative electrical charges.
Fats, Nutrition and Health
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A fat molecule with more than one double bond is called polyunsaturated.
On Food and Cooking, The Science and Lore of the Kitchen
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Organic sulfates are esters and are formed by reacting an alcohol with cold sulfuric acid or by the reaction of sulfuric acid with a double bond in an alkene.
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Due to their double bonds they possess negative electrical charges.
Fats, Nutrition and Health
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In recent years, more and more scientists modify the double bond or benzene ring of resveratrol to get higher active, lower toxicity derivates.
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Kuhn's sixth report on conjugated double bonds already contains structure determinations of polyene dyes from vegetable materials.
Nobel Prize in Chemistry 1938 - Presentation Speech
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Interestingly, in spite of its instability, the O3 molecule can be stabilized as an ozonide between the double bonds of a monounsaturated fatty acid such as oleic acid.
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The next bond is a double bond this happens when two pairs of electrons share.
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Ozone is a strong electrophilic reagent which can attack the double bond found in alkenes.
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Addition reactions of electrophilic reagents to the alkene double bond (yielding substituted alkenes) are the most typical.
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Compared with diolefine rubber, EPDM has less double bond.
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If the ketone side group of the dye is protonated, there will be a shift in the conjugation of the double bonds.
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For example, the cis double bond at the centre of the fatty chain in erucamide and oleamide appears vital for slip performance.
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The conjugated double bonds of this structure allow the chlorophyll molecule to absorb energy from sunlight.
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Fatty acids that contain double bonds between carbon atoms in their chain are termed unsaturated fatty acids.
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This structure has a resonance form, an enolate ion, in which a double bond is formed between this negative carbon and the carbonyl carbon, the C-O bond becomes a single bond, and the negative charge is placed on the oxygen atom.
Citizendium, the Citizens' Compendium - Recent changes [en]
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Secondary alcohols can be readily recovered from ketones by breaking the double bond between the oxygen and carbon and adding hydrogen.
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Consistently, biochemical assays showed that the SpvC-catalyzed reaction can generate both double bond-containing and covalently linked products.
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When eight double bonds are in conjugation, the molecule absorbs visible light and is colored.
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Since there are two atoms bound to the sulfur atom (the less electronegative element), there must be one double bond.