How To Use Diazo In A Sentence
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The following ingredients contain formaldehyde, may release formaldehyde or may break down into formaldehyde: 2-bromo-2-nitropropane-1,3-diol, Diazolidinyl urea, DMDM hydantoin, Imidazolidinyl urea, Quaternium 15, 3 1,4 dioxane 3. PHTHALATES
Deborah Burnes: The Good, the Bad and the Beautiful
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C_6H_5·N_2·C_6H_3 (NH_2) _2, first prepared by O. Witt (_Ber. _, 1877, 10, p. 656), is obtained by coupling phenyl diazonium chloride with meta-phenylene diamine.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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The chemical change light effects in the diazotized primuline is not well known.
Photographic Reproduction Processes
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They can be diazotised at the ordinary temperature, and their diazo compounds are much stabler than those, for example, of alpha-and beta-naphthylamine or of aniline, which must always be used as quickly as possible.
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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These nitrites then react to form a diazonium salt which in turn reacts with a chromogen to produce the final color.
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-- The oxyazo compounds are prepared by adding a solution of a diazonium salt to a cold slightly alkaline solution of a phenol.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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* Alla kai tois Ephesiois epistellon hos gnesios henomenois to Onti di 'epignoseos, "ontas" autous idiazontos honomasen, eipon; "tois hagiois tois oisi, kai pistois en Christo Iesou." houto gar kai hoi pro hemon paradedokasi, kai hemeis en tois palaiois ton antigraphon heurekamen: [1486] 1
The Last Twelve Verses of the Gospel According to S. Mark Vindicated Against Recent Critical Objectors and Established
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München, where I found by a simple crystallograpic experiment the molecular weight and probable steroid nature of ecdysone which Hoppe and I later elucidated in atomic detail after my thesis work which was on the crystal structure of a diazo compound (1963).
Robert Huber - Autobiography
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C_6H_5CONH·CH_2CONH·NH_2, and this substance is converted by nitrous acid into diazo-hippuramide, C_6H_5CONH·CH_2·CO·NH·N_2·OH, which is hydrolysed by the action of caustic alkalis with the production of salts of hydrazoic acid.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.
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Phenol can be produced from aniline by reacting aniline with a mixture of sodium nitrite and hydrochloric acid to give benzene diazonium chloride, that when heated gently, gives off nitrogen to leave phenol.
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Alkylated amino-azo-benzenes are also known, and are formed by the coupling of diazonium salts with alkylated amines, provided they contain a free para position with respect to the amino group.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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The limulus lysate activity of LPS preparations were measured by the limulus chromo- genic diazotic assay and was calculated according to their correspondent reference test with standard endotoxin.
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Hydroxyproline was quantified by reverse-phase high performance liquid chromatography (HPLC) of 7-chloro-4-nitrobenzo-oxao-1,3, - diazole - derived acid hydrolysates; the total left lung collagen was then calculated in milligrams, assuming that lung collagen contains 12. 2% (w/w) hydroxyproline.
PLoS ONE Alerts: New Articles
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The manufacture of PY74 would most likely occur through diazotization of 2-amino - 5-nitroanisole to the corresponding diazonium salt and condensation of the diazonium salt with o-acetoacetanisidide.
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: Synthetic fragrance, which can be highly irritating and are also a potential source of questionable sub-ingredients such as phthalates; formaldehyde-donor preservatives-such as diazolidinyl urea, DMD hydantoin, imidazolidinyl urea, and sodium hydroxymethylglycinate-which under certain circumstances of formulation and storage, these ingredients have the potential to release formaldehyde in very small amounts; and chemical sunscreens, such as oxybenzone and octyl methoxycinnamate, have safety concerns since many have been shown to have endocrine-disruption activity.
GOOD
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Lipids were extracted according to the method of Bligh and Dyer, followed by methylation with ethereal diazomethane.
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The following ingredients contain formaldehyde, may release formaldehyde or may break down into formaldehyde: 2-bromo-2-nitropropane-1,3-diol, Diazolidinyl urea, DMDM hydantoin, Imidazolidinyl urea, Quaternium 15, 3 1,4 dioxane 3. PHTHALATES
Deborah Burnes: The Good, the Bad and the Beautiful
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The sensitiveness of diazotized primuline to light, when united to organic substances and the different colors which can be obtained with the unaltered compound, have given rise to an interesting printing method, the invention of Messrs.A. G.
Photographic Reproduction Processes
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Among these were fifty on ketenes, also works on oxalyl chloride, autoxidation, aliphatic diazo-compounds, explosions, insecticides, synthetic pepper and coffee aroma.
Hermann Staudinger - Biography
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By the action of nitrous acid upon amido-azo bodies a group of bodies called diazo-azo compounds are obtained which contain the group N: N twice over, thus: --
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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In certain cases (lobeline, nicotine, cyanide, sulphide, etc.) the drug acts on the glomus, in others (e.g. Cardiazol) it acts by central stimulation and again in other cases (e.g. Coramine) it acts centrally and peripherally.
Physiology or Medicine 1938 - Presentation Speech
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The most easily obtained mixed azo compounds are those formed by the union of a diazonium salt with the potassium or sodium salt of a nitroparaffin (V. Meyer, _Ber. _, 1876, 9, p. 384):
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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It is a prodrug in which 5-aminosalicylic acid is linked via a diazo bond to 4-aminobenzoyl- alanine, an inert and biologically inactive carrier molecule.
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Noelting and E. Grandmougin (_Berichte_, 1891, 24, p. 2546) obtained azoimide from dinitraniline, C_6H_3 (NO_2) _2·NH_2, by diazotization and conversion of the diazo compound into the perbromide,
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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It is a prodrug in which 5-aminosalicylic acid is linked via a diazo bond to 4-aminobenzoyl- alanine, an inert and biologically inactive carrier molecule.
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R2 contains 3 mmol / L of diazonium ion and 100 mmol / L of hydrochloric acid.
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Mention should also be made of his other investigations; the conversion of chloral into dichloroacetic acid, the series of studies on the amide chlorides, imide chlorides, amidines, glyoxalines, etc., his work on azo dyes and diazo compounds, and many others.
Otto Wallach - Biography
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_Ammonium azoimide_, N_3·NH_4, may be prepared by boiling diazohippuramide with alcoholic ammonia, until no more ammonia escapes, the following reaction taking place:
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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As a result, most patients with glutamate dehydrogenase hyperinsulinism will be responsive to Diazoxide.
Diazoxide
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: Synthetic fragrance, which can be highly irritating and are also a potential source of questionable sub-ingredients such as phthalates; formaldehyde-donor preservatives-such as diazolidinyl urea, DMD hydantoin, imidazolidinyl urea, and sodium hydroxymethylglycinate-which under certain circumstances of formulation and storage, these ingredients have the potential to release formaldehyde in very small amounts; and chemical sunscreens, such as oxybenzone and octyl methoxycinnamate, have safety concerns since many have been shown to have endocrine-disruption activity.
GOOD
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These man-made compounds have a ring of six carbons (the benzo part) joined to a 7-member ring with 5 carbons and 2 nitrogens indicated by diazo.
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The most easily obtained mixed azo compounds are those formed by the union of a diazonium salt with the potassium or sodium salt of a nitroparaffin (V. Meyer, _Ber. _, 1876, 9, p. 384):
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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In other words, the diazotized primuline acts as a mordant only when not altered by the luminous action.
Photographic Reproduction Processes
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If the material so dyed be placed in an acidified solution of nitrous oxide, the primuline is diazotized, forming a derivative compound of a deeper color, which fades in the light, and which in presence of amines and phenols gives rise to a variety of dyes whose color depends on the reagent employed, while, when acted on by light, the resulting compound is entirely deprived of this property.
Photographic Reproduction Processes
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Glauber's salt, then diazotise and develop with naphthylamine ether.
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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They may be prepared by the reduction of nitro compounds in alkaline solution (using zinc dust and alkali, or a solution of an alkaline stannite as a reducing agent); by oxidation of hydrazo compounds; or by the coupling of a diazotized amine and any compound of a phenolic or aminic type, provided that there is a free para position in the amine or phenol.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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In addition to these alkali ions and other metal ions, it has been possible to produce host molecules that bind organic positive ions (cations such as diazonium and alkylammonium ions), as well as other host molecules which can bind small neutral molecules or negative ions
Press Release: The 1987 Nobel Prize in Chemistry
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_ -- The diazo-amines, R·N: N·NHR_1, are obtained by the action of primary amines on diazonium salts; by the action of nitrous acid on a free primary amine, an iso-diazohydroxide being formed as an intermediate product which then condenses with the amine; and by the action of nitrosamines on primary amines.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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Pain management doctor James Gagne said Kapoor was feeding Smith's addiction to prescription medications by excessively prescribing opiates, including methadone and Dilaudid, which is nicknamed "hospital heroin," and sedatives known as benzodiazopines.
Undefined
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Ladislav von Meduna started seizure therapy by intravenous injection of cardiazol (in depressive states), a therapy that was abandoned when in 1938 the Italians Cerletti and Bini introduced electric convulsive therapy, E.C.T., for severe mental states.
Controversial Psychosurgery Resulted in a Nobel Prize
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When the material to print upon is thick and wholly impregnated with diazotized primuline, it is advisable, since the insulation could not be prolonged to effect the change through, to expose the back of the material for a certain but short period in order to _clear_ it.
Photographic Reproduction Processes
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With diazomethane itself, you can watch its color disappear and know that something's happening.
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It is ironic that the human eye, but not the Hitachi 917, can easily distinguish the pink color of the genuine diazo reaction from the white turbidity of the precipitate.
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Georg Theander, a topic to investigate, i.e. to measure the duration of action of pentylenetetrazol (Cardiazol), a convulsant at that time frequently used as an "artaleptic" to wake up people who had taken an overdose of a hypnotic or sedative, and also used as a forerunner of electroconvulsive therapy.
Arvid Carlsson - Autobiography
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Somewhat later, they found that it could be prepared from diazobenzene imide, provided a nitro group were present in the ortho or para position to the diazo group.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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When these amido bodies are treated with sodium nitrite and hydrochloric acid they undergo a chemical change, the feature of which is that the nitrogen atoms present in the amido compound and in the nitrite unite together and a new compound is produced which is called a diazo compound, and the operation is called "diazotisation".
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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Hydroxyproline was quantified by reverse-phase high performance liquid chromatography (HPLC) of 7-chloro-4-nitrobenzo-oxao-1,3, - diazole - derived acid hydrolysates; the total left lung collagen was then calculated in milligrams, assuming that lung collagen contains 12. 2% (w/w) hydroxyproline.
PLoS ONE Alerts: New Articles
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These are thought to be formed by the release of nitrogen gas during the photolysis of the diazo group.
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It would be ironic if courts, seeing opposing expert witnesses giving odds of correct identification differing a million-fold (105: 1 versus 1011: 1), were to decide that DNA evidence is hopelessly unreliable, and turn instead to eye-witness identification (odds of correct identification diazonium salt -- couples to enzyme tyrosine groups
Archive 2004-12-01
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The group says consumers can look out for ingredients that are likely to contain either of the chemicals, though, including: peg-100 stearate, sodium laureth sulfate, polyethylene and ceteareth-20, quaternium-15, DMDM hydantoin, imidazolidinyl urea, diazolidinyl urea and sodium hydroxymethoylglycinate. —
Group finds carcinogens in kids bath products
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The dried samples were methylated with fresh ethereal diazomethane.
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Progress in the Study on the Synthesis and the Activities as Insect Growth Regulators of 2,5- Disubstituted 1,3,4-Oxadiazoles.
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It is discovered that nitrite, diazo compound and 2-naphthalin-1-sulfonic intensively disturb the determination of anilin.
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[166] Alla kai tois Ephesiois epistellon hos gnesios henomenois to Onti di 'epignoseos, "ontas" autous idiazontos honomasen, eipon; "tois hagiois tois oisi, kai pistois en Christo Iesou." houto gar kai hoi pro hemon paradedokasi, kai hemeis en tois palaiois ton antigraphon heurekamen.
The Last Twelve Verses of the Gospel According to S. Mark Vindicated Against Recent Critical Objectors and Established
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It may be prepared by the action of ammonia on diazobenzene perbromide; by the action of hydroxylamine on a diazonium sulphate (K. Heumann and L. Oeconomides,
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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(This allows the diazo groups to covalently couple to the tyrosine phenolic groups on the enzyme)
Archive 2004-12-01
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Samples were evaporated to dryness under vacuum, redissolved in 20 mm of methanol, then diazomethane added to methylate ABA.
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Phenol can be produced from aniline by reacting aniline with a mixture of sodium nitrite and hydrochloric acid to give benzene diazonium chloride, that when heated gently, gives off nitrogen to leave phenol.
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* Lead as activator in the fluorescent powder (1% lead by weight or less) of discharge lamps when used as sun tanning lamps containing phosphorus and when used as specialty lamps for diazo printing reprography, lithography, insect traps, photochemical and curling processes.,
Purchasing - Top Stories
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Improved yield and selectivity are observed while applying this technology on diazo - coupling reactions.
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Mention should also be made of his other investigations; the conversion of chloral into dichloroacetic acid, the series of studies on the amide chlorides, imide chlorides, amidines, glyoxalines, etc., his work on azo dyes and diazo compounds, and many others.
Otto Wallach - Biography
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The diazonium salt can also be reacted and joined to phenolic groups and amines to give azo compounds.
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However, because of the two dithiadiazole functionalities at either end of the molecule, the solid state structure is polymeric rather than dimeric.
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They may be prepared by the reduction of nitro compounds in alkaline solution (using zinc dust and alkali, or a solution of an alkaline stannite as a reducing agent); by oxidation of hydrazo compounds; or by the coupling of a diazotized amine and any compound of a phenolic or aminic type, provided that there is a free para position in the amine or phenol.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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_ -- The diazo-amines, R·N: N·NHR_1, are obtained by the action of primary amines on diazonium salts; by the action of nitrous acid on a free primary amine, an iso-diazohydroxide being formed as an intermediate product which then condenses with the amine; and by the action of nitrosamines on primary amines.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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By itself diazotized primuline is slowly influenced by light, but quickly acted on in presence of organic substances.
Photographic Reproduction Processes
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Caution: the reaction sequence should be carried out behind a blast shield and in the hood because diazomethane is a vapor.
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The sap samples were thawed and an internal standard of [H 6] ABA was added before they were dried, methylated with ethereal diazomethane, dried and redissolved in methanol for analysis by gc/ms.
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[33] and involves three steps, namely reduction of thiol groups using TCEP (tris (CarboxyEthyl) Phosphine), protein precipitation with trichloroacetic acid, and derivatization with SBD-F (7-fluorobenzene-2-oxy-1,3-diazolic-4-am monium sulfate).
PLoS ONE Alerts: New Articles
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However, the products obtained from reactions with halides can be rather surprising - ie the dithiadiazole can trap free radical intermediates.
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The group says consumers can look out for ingredients that are likely to contain either of the chemicals, though, including: peg-100 stearate, sodium laureth sulfate, polyethylene and ceteareth-20, quaternium-15, DMDM hydantoin, imidazolidinyl urea, diazolidinyl urea and sodium hydroxymethoylglycinate. —
Study links formaldehyde to more common cancers
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The fizzing is the diazo group breaking down, with nitrogen gas being given off as the compound reacts.
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By the action of nitrous acid upon the salts of the primary organic amines the so-called diazo compounds are formed.
The Dyeing of Cotton Fabrics A Practical Handbook for the Dyer and Student
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A series of azo hydroxyporphyrin - oxadiazole compounds were synthesized and characterized by 1 HNMR, FAB - MS, IR and UV - Vis spectra.
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Alkylated amino-azo-benzenes are also known, and are formed by the coupling of diazonium salts with alkylated amines, provided they contain a free para position with respect to the amino group.
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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Noelting and E. Grandmougin (_Berichte_, 1891, 24, p. 2546) obtained azoimide from dinitraniline, C_6H_3 (NO_2) _2·NH_2, by diazotization and conversion of the diazo compound into the perbromide,
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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Th. Zincke found that the products obtained by coupling a diazonium salt with [alpha] - naphthol, and by condensing phenyl-hydrazine with
Encyclopaedia Britannica, 11th Edition, Volume 3, Part 1, Slice 1 "Austria, Lower" to "Bacon"
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There have long been films impregnated with diazo dyes which form a picture without development, so that it is already there as soon as the camera has been operated.
As We May Think
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Noyori asymmetric hydrogenation is the asymmetric reduction of β-keto-esters Amines can be converted to diazonium salts which are then hydrolyzed.
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