Organic salts of cyanic acid containing the -OCN radical.
Works containing information articles on subjects in every field of knowledge, usually arranged in alphabetical order, or a similar work limited to a special field or subject. (From The ALA Glossary of Library and Information Science, 1983)
The study of crystal structure using X-RAY DIFFRACTION techniques. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
A low-energy attractive force between hydrogen and another element. It plays a major role in determining the properties of water, proteins, and other compounds.
NATIONAL LIBRARY OF MEDICINE service for health professionals and consumers. It links extensive information from the National Institutes of Health and other reviewed sources of information on specific diseases and conditions.
Models used experimentally or theoretically to study molecular shape, electronic properties, or interactions; includes analogous molecules, computer-generated graphics, and mechanical structures.
Enzymes that catalyze the cleavage of a carbon-nitrogen bond by means other than hydrolysis or oxidation. Subclasses are the AMMONIA-LYASES, the AMIDINE-LYASES, the amine-lyases, and other carbon-nitrogen lyases. EC 4.3.
Transparent, tasteless crystals found in nature as agate, amethyst, chalcedony, cristobalite, flint, sand, QUARTZ, and tridymite. The compound is insoluble in water or acids except hydrofluoric acid.
A subclass of cannabinoid receptor found primarily on central and peripheral NEURONS where it may play a role modulating NEUROTRANSMITTER release.
A compound formed in the liver from ammonia produced by the deamination of amino acids. It is the principal end product of protein catabolism and constitutes about one half of the total urinary solids.
Derivatives of ammonium compounds, NH4+ Y-, in which all four of the hydrogens bonded to nitrogen have been replaced with hydrocarbyl groups. These are distinguished from IMINES which are RN=CR2.
A colorless, odorless gas that can be formed by the body and is necessary for the respiration cycle of plants and animals.
A highly poisonous compound that is an inhibitor of many metabolic processes, but has been shown to be an especially potent inhibitor of heme enzymes and hemeproteins. It is used in many industrial processes.
An element in the alkali group of metals with an atomic symbol K, atomic number 19, and atomic weight 39.10. It is the chief cation in the intracellular fluid of muscle and other cells. Potassium ion is a strong electrolyte that plays a significant role in the regulation of fluid volume and maintenance of the WATER-ELECTROLYTE BALANCE.
A plant genus of the family POACEAE that many people consider to be a weed.
Inorganic salts of HYDROGEN CYANIDE containing the -CN radical. The concept also includes isocyanides. It is distinguished from NITRILES, which denotes organic compounds containing the -CN radical.
Cell membrane glycoproteins that are selectively permeable to potassium ions. At least eight major groups of K channels exist and they are made up of dozens of different subunits.
Silver. An element with the atomic symbol Ag, atomic number 47, and atomic weight 107.87. It is a soft metal that is used medically in surgical instruments, dental prostheses, and alloys. Long-continued use of silver salts can lead to a form of poisoning known as ARGYRIA.
Nitric acid (HNO3). A colorless liquid that is used in the manufacture of inorganic and organic nitrates and nitro compounds for fertilizers, dye intermediates, explosives, and many different organic chemicals. Continued exposure to vapor may cause chronic bronchitis; chemical pneumonitis may occur. (From Merck Index, 11th ed)
A silver salt with powerful germicidal activity. It has been used topically to prevent OPHTHALMIA NEONATORUM.
Analysis of the energy absorbed across a spectrum of x-ray energies/wavelengths to determine the chemical structure and electronic states of the absorbing medium.
Messages between computer users via COMPUTER COMMUNICATION NETWORKS. This feature duplicates most of the features of paper mail, such as forwarding, multiple copies, and attachments of images and other file types, but with a speed advantage. The term also refers to an individual message sent in this way.
The study of natural phenomena by observation, measurement, and experimentation.
A disease characterized by chronic hemolytic anemia, episodic painful crises, and pathologic involvement of many organs. It is the clinical expression of homozygosity for hemoglobin S.
The senescence of RED BLOOD CELLS. Lacking the organelles that make protein synthesis possible, the mature erythrocyte is incapable of self-repair, reproduction, and carrying out certain functions performed by other cells. This limits the average life span of an erythrocyte to 120 days.
Stable chromium atoms that have the same atomic number as the element chromium, but differ in atomic weight. Cr-50, 53, and 54 are stable chromium isotopes.
Instructional use of examples or cases to teach using problem-solving skills and critical thinking.
An element with atomic symbol O, atomic number 8, and atomic weight [15.99903; 15.99977]. It is the most abundant element on earth and essential for respiration.
A highly anionic organic phosphate which is present in human red blood cells at about the same molar ratio as hemoglobin. It binds to deoxyhemoglobin but not the oxygenated form, therefore diminishing the oxygen affinity of hemoglobin. This is essential in enabling hemoglobin to unload oxygen in tissue capillaries. It is also an intermediate in the conversion of 3-phosphoglycerate to 2-phosphoglycerate by phosphoglycerate mutase (EC 5.4.2.1). (From Stryer Biochemistry, 4th ed, p160; Enzyme Nomenclature, 1992, p508)
A family of snakes comprising the boas, anacondas, and pythons. They occupy a variety of habitats through the tropics and subtropics and are arboreal, aquatic or fossorial (burrowing). Some are oviparous, others ovoviviparous. Contrary to popular opinion, they do not crush the bones of their victims: their coils exert enough pressure to stop a prey's breathing, thus suffocating it. There are five subfamilies: Boinae, Bolyerinae, Erycinae, Pythoninae, and Tropidophiinae. (Goin, Goin, and Zug, Introduction to Herpetology, 3d ed, p315-320)
A medical specialty concerned with the diagnosis and treatment of diseases of the internal organ systems of adults.
The act or practice of literary composition, the occupation of writer, or producing or engaging in literary work as a profession.
Compounds formed by the joining of smaller, usually repeating, units linked by covalent bonds. These compounds often form large macromolecules (e.g., BIOPOLYMERS; PLASTICS).
Organic derivatives of thiocyanic acid which contain the general formula R-SCN.
A species of gram-negative bacteria in the genus PSEUDOMONAS. All strains can utilize FRUCTOSE for energy. It is occasionally isolated from humans and some strains are pathogenic to WATERMELON.
Methylmaleic anhydrides.
A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)
Flammable, amorphous, vegetable products of secretion or disintegration, usually formed in special cavities of plants. They are generally insoluble in water and soluble in alcohol, carbon tetrachloride, ether, or volatile oils. They are fusible and have a conchoidal fracture. They are the oxidation or polymerization products of the terpenes, and are mixtures of aromatic acids and esters. Most are soft and sticky, but harden after exposure to cold. (From Grant & Hackh's Chemical Dictionary, 5th ed & Dorland, 28th ed)
Synthetic resins, containing an inert filler, that are widely used in dentistry.
The loss of water vapor by plants to the atmosphere. It occurs mainly from the leaves through pores (stomata) whose primary function is gas exchange. The water is replaced by a continuous column of water moving upwards from the roots within the xylem vessels. (Concise Dictionary of Biology, 1990)
A set of techniques used when variation in several variables has to be studied simultaneously. In statistics, multivariate analysis is interpreted as any analytic method that allows simultaneous study of two or more dependent variables.
A shaker subfamily that is prominently expressed in NEURONS and are necessary for high-frequency, repetitive firing of ACTION POTENTIALS.
Proteins that form the core of amyloid fibrils. For example, the core of amyloid A is formed from amyloid A protein, also known as serum amyloid A protein or SAA protein.

Reactivity of cyanate with valine-1 (alpha) of hemoglobin. A probe of conformational change and anion binding. (1/258)

The 3-fold increase in the carbamylation rate of Val-1 (alpha) of hemoglobin upon deoxygenation described earlier is now shown to be a sensitive probe of conformational change. Thus, whereas this residue in methemoglobin A is carbamylated at the same rate as in liganded hemoglobin, upon addition of inositol hexaphosphate its carbamylation rate is enhanced 30% as much as the total change in the rate between the CO and deoxy states. For CO-hemoglobin Kansas in the presence of the organic phosphate, the relative increase in the carbamylation rate of this residue is about 50%. These results indicate that methemoglobin A and hemoglobin Kansas in the presence of inositol hexaphosphate do not assume a conformation identical with deoxyhemoglobin but rather form either a mixture of R and T states or an intermediate conformation in the region around Val-1 (alpha). Studies on the mechanism for the rate enhancement in deoxyhemoglobin suggest that the cyanate anion binds to groups in the vicinity of Val-1 (alpha) prior to proton transfer and carbamylation of this NH2-terminal residue. Thus, specific removal with carboxypeptidase B of Arg-141 (alpha), which is close to Val-1 (alpha) in deoxyhemoglobin, abolishes the enhancement in carbamylation. Chloride, which has the same valency as cyanate, is a better competitive inhibitor of the carbamylation of deoxyhemoglobin (Ki = 50 mM) compared with liganded hemoglobin. Nitrate and iodide are also effective inhibitors of the carbamylation of Val-1 (alpha) of deoxyhemoglobin (Ki = 35 mM); inorganic phosphate, sulfate, and fluoride are poor competitive inhibitors. The change in pKa of Val-1 (alpha) upon deoxygenation may be due to its differential interaction with chloride.  (+info)

Effect of chronic sodium cyanate administration on O2 transport and uptake in hypoxic and normoxic exercise. (2/258)

Systemic O2 transport during maximal exercise at different inspired PO2 (PIO2) values was studied in sodium cyanate-treated (CY) and nontreated (NT) rats. CY rats exhibited increased O2 affinity of Hb (exercise O2 half-saturation pressure of Hb = 27.5 vs. 42.5 Torr), elevated blood Hb concentration, pulmonary hypertension, blunted hypoxic pulmonary vasoconstriction, and normal ventilatory response to exercise. Maximal rate of convective O2 transport was higher and tissue O2 extraction was lower in CY than in NT rats. The relative magnitude of these opposing changes, which determined the net effect of cyanate on maximal O2 uptake (VO2 max), varied at different PIO2: VO2 max (ml. min-1. kg-1) was lower in normoxia (72.8 +/- 1.9 vs. 81. 1 +/- 1.2), the same at 70 Torr PIO2 (55.4 +/- 1.4 vs. 54.1 +/- 1.4), and higher at 55 Torr PIO2 (48 +/- 0.7 vs. 40.4 +/- 1.9) in CY than in NT rats. The beneficial effect of cyanate on VO2 max at 55 Torr PIO2 disappeared when Hb concentration was lowered to normal. It is concluded that the effect of cyanate on VO2 max depends on the relative changes in blood O2 convection and tissue O2 extraction, which vary at different PIO2. Although uptake of O2 by the blood in the lungs is enhanced by cyanate, its release at the tissues is limited, probably because of a reduction in the capillary-to-tissue PO2 diffusion gradient secondary to the increased O2 affinity of Hb.  (+info)

Subchronic exposure to diisocyanates increases guinea pig tracheal smooth muscle responses to acetylcholine. (3/258)

OBJECTIVE: In order to study the threshold concentrations of isocyanates (IC) for induction of lung disorders, constrictive responses of tracheal smooth muscles to acetylcholine (ACH) in guinea pigs with and without diisocyanate [toluene diisocyanate (TDI), hexamethylene diisocyanate (HDI) and diphenylmethane diisocyanate (MDI)] exposure were investigated. METHODS: An IC-induced increase in smooth muscle responsiveness was studied by measuring cumulative ACH dose responses (10(-10) to 10(-4) M ACH). Basal ACH dose-response curves, measured twice in intervals of 1 h using tracheal preparations of 11 guinea pigs previously not exposed to IC, were reproducible. RESULTS: Subchronic in vivo exposures to TDI, HDI, and MDI atmospheres of 10 and 20 parts per billion (ppb) on 5 consecutive days led to significantly (p < 0.05) increased ACH responsiveness of tracheal smooth muscle, whereas concentrations of 2.5 and 5 ppb were not effective. Exposure to HDI atmospheres of 10 ppb for 1, 2, 4, or 8 weeks resulted in a time-dependent increase in ACH responses (p < 0.05) of guinea pig tracheal smooth muscle. Increased tracheal muscle responses to ACH were transient since tracheal preparations from animals exposed to 10 and 20 ppb MDI for 4 weeks and with an exposure-free interval of 8 weeks before preparation did not show enlarged ACH responses, which were present in preparations at the end of the exposure period (p < 0.05). Exposure to low IC concentrations as present in workplaces cause increased ACH responsiveness of guinea pig tracheal smooth muscle. The increased responsiveness of the airways seems to be largely reversible, since normal responses were found after 8 weeks of IC avoidance. CONCLUSION: Reversibility of IC-induced airway hyperresponsiveness is of great occupational and preventive medical importance. Workers with acquired airway hyperresponsiveness might escape lung damage if the changes are detected in an early stage before alterations in lung function are in a chronic stage.  (+info)

Bioactivation of cyanide to cyanate in sulfur amino acid deficiency: relevance to neurological disease in humans subsisting on cassava. (4/258)

Neurological disorders have been reported from parts of Africa with protein-deficient populations and attributed to cyanide (CN-) exposure from prolonged dietary use of cassava, a cyanophoric plant. Cyanide is normally metabolized to thiocyanate (SCN-) by the sulfur-dependent enzyme rhodanese. However, in protein-deficient subjects where sulfur amino acids (SAA) are low, CN may conceivably be converted to cyanate (OCN-), which is known to cause neurodegenerative disease in humans and animals. This study investigates the fate of potassium cyanide administered orally to rats maintained for up to 4 weeks on either a balanced diet (BD) or a diet lacking the SAAs, L-cystine and L-methionine. In both groups, there was a time-dependent increase in plasma cyanate, with exponential OCN- increases in SAA-deficient rats. A strongly positive linear relationship between blood CN- and plasma OCN- concentrations was observed in these animals. These data are consistent with the hypothesis that cyanate is an important mediator of chronic cyanide neurotoxicity during protein-calorie deficiency. The potential role of thiocyanate in cassava-associated konzo is discussed in relationship to the etiology of the comparable pattern of motor-system disease (spastic paraparesis) seen in lathyrism.  (+info)

Treatment of intradural paraclinoidal aneurysms. (5/258)

Intradural paraclinoidal aneurysm still presents conceptual confusion and technical surgical problems. The clinical features of 68 consecutive patients with paraclinoidal aneurysms were analyzed. The pterional approach was used in all patients. Subarachnoid hemorrhage (SAH) occurred in 37 patients from the paraclinoidal aneurysm and in 10 patients from another associated aneurysm. Thirty-four of the 37 ruptured paraclinoidal aneurysms were clipped, two blister-like aneurysms required trapping, and one blister-like aneurysm was coated. Thirteen of the 31 unruptured paraclinoidal aneurysms, consisting of 10 with ruptured associated aneurysm, four symptomatic, and 17 incidental, were clipped and 18 were coated. Favorable outcomes were obtained in 38 of 47 patients with SAH and 17 of 21 patients without SAH. Nine unfavorable outcomes in SAH patients were caused by primary brain damage (5), vasospasm (2), cerebral infarction after trapping (1), and pneumonia (1). All four unfavorable outcomes in non-SAH patients were due to surgical procedures for giant aneurysms or associated basilar artery aneurysm. Removal of the anterior clinoid process was performed to secure the proximal neck in 15 patients with large or giant aneurysms. Multiple clips with or without fenestrated clips were required in all giant aneurysms, and exposure of the cervical internal carotid artery (ICA) in 17 giant or large aneurysms. Fenestrated clips were also useful for one small aneurysm projecting posteriorly. A favorable outcome was achieved in 17 of 19 patients undergoing coating. Coating without clipping might be better for some blister-like ICA aneurysms, even if ruptured. Paraclinoidal aneurysms can be clipped with favorable results using these techniques except for giant aneurysms and associated basilar artery aneurysm.  (+info)

Biological monitoring to assess exposure from use of isocyanates in motor vehicle repair. (6/258)

OBJECTIVES: To develop a method for the measurement of a metabolite of hexamethylene diisocyanate (HDI), an isocyanate, and use it to assess the exposure of sprayers employed in motor vehicle repair shops. METHODS: Urine samples were taken from sprayers wearing personal protective equipment and spraying in booths or with local exhaust ventilation, from bystanders, and from unexposed subjects. Samples were analyzed for a metabolite of HDI, hexamethylene diamine (HDA), by gas chromatography-mass spectrometry (GC-MS). RESULTS: HDA was detected in four sprayers and one bystander out of 22 workers. No HDA was detected in the urine of unexposed subjects. CONCLUSIONS: Exposure to isocyanates still occurs despite the use of personal protective equipment and the use of a booth or extracted space. Health surveillance is likely to be required to provide feedback on the adequacy of controls even if such precautions are used and to identify cases of early asthma. Biological monitoring can provide a useful additional tool to assess exposure and the adequacy of controls in this group of exposed workers.  (+info)

Histological changes in the rat common carotid artery following simultaneous topical application of cotton sheet and cyanoacrylate glue. (7/258)

Histological changes in and around the arterial walls of rats were investigated following simultaneous topical application of cotton sheet and cyanoacrylate glue. The bilateral common carotid arteries were exposed using sterile techniques, and the test materials were applied to the right artery. The left artery served as a control. Changes in arterial histology were evaluated at 2 weeks, 1 month, 2 months, and 3 months after surgery. Extensive inflammation consisting primarily of histiocytes and multinuclear giant cells was observed around the materials, but tended to decrease by 3 months. Necrosis in the media and fibrosis in the adventitia initially appeared around 2 weeks, and became advanced by 2-3 months. At 2-3 months, disruption of elastic fibers and marked fibrosis in the media were seen, and endothelial proliferation in the intima appeared. Intimal proliferation was observed at both the experimental and other sites of the vessels. The present results suggest that simultaneous use of the test materials can cause the arterial occlusive lesions observed following aneurysmal surgery.  (+info)

Exposure biomarkers and risk from gluing and heating of polyurethane: a cross sectional study of respiratory symptoms. (8/258)

OBJECTIVES: To define the relation between exposure to polyurethane (PUR) glue, biomarkers of exposure and effect, and work related symptoms that occur at least once a week. METHODS: In a cross sectional study, 152 workers and 14 clerks in a factory with exposure to sprayed and heated PUR glue containing 4, 4'-diphenylmethane (MDI) or 1,6-hexamethylene (HDI) di-isocyanate were examined with gas chromatography-mass spectrometry (GC-MS) for metabolites of MDI in plasma (P-MDX) and urine (U-MDX), 2,4- and 2, 6-toluene di-isocyanate (TDI; P-TDX, U-TDX) and HDI in plasma and urine, specific serum IgG (S-IgG-MDI, S-IgG-HDI, and S-IgG-TDI, respectively) and IgE (S-IgE-MDI). Work related symptoms of the eyes and airways (nose or lower airways, or both), and lung function were also evaluated. RESULTS: P-MDX was detected in 65% of the workers, U-TDX in 47%, HDX in none. Three per cent were positive for S-IgE-MDI, 33% for S-IgG-MDI, 32% for S-IgG-TDI, and 12% for S-IgG-HDI. A few clerks had metabolites, and some had antibodies. Most metabolites and immunoglobulins were slightly correlated-for example, P-MDX v S-IgG-MDI: r(s)=0.21. Workers who heated glue had increased P-MDX (odds ratio (OR)=12 for a value above the median) and S-IgG-MDI (OR=3.7), sprayers P-2,4-TDX (OR=6.2) and P-2,6-TDX (OR=16). Twenty six per cent of the workers had work related symptoms of the airways, 21% from the nose, 11% from the lower airways. Spraying of glue increased the risk of work related symptoms and slightly decreased lung function. U-MDX was associated with work related symptoms from the airways (OR=3.7) and P-2,6-TDX with work related symptoms from the lower airways (OR=6.6). S-IgG-MDI was related to work related symptoms from the airways (OR=2.6). CONCLUSIONS: There were relations between exposures to sprayed and heated PUR glue based on MDI and HDI, concentrations of metabolites of MDI and TDI in plasma and urine, specific IgG serum antibodies against MDI, TDI, and HDI, and work related symptoms.  (+info)

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Potassium cyanate definition is - a crystalline salt KOCN made by oxidizing potassium cyanide or by heating a mixture of potassium carbonate and urea and used chiefly to kill crabgrass on lawns.
Silver cyanate is a chemical compound; it is the cyanate salt of silver. It can be prepared by the reaction of potassium cyanate or urea with silver nitrate. A g N O 3 + K O C N ⟶ A g O C N ↓ + K N O 3 {\displaystyle \mathrm {AgNO_{3}+KOCN\longrightarrow AgOCN\downarrow +\ KNO_{3}} } A g N O 3 + H 2 N - C ( O ) - N H 2 ⟶ {\displaystyle \mathrm {AgNO_{3}+H_{2}N{\text{-}}C(O){\text{-}}NH_{2}\longrightarrow } } A g O C N ↓ + N H 4 N O 3 {\displaystyle \mathrm {AgOCN\downarrow +\ NH_{4}NO_{3}} } Silver cyanate is a beige to gray powder. It crystallises in the monoclinic crystal system in space group P21/m with parameters a = 547.3 pm, b = 637.2 pm, c = 341.6 pm, and β = 91°. With nitric acid, silver cyanate reacts to form carbon dioxide and ammonium nitrate. A g O C N + 2 H N O 3 + H 2 O ⟶ {\displaystyle \mathrm {AgOCN+2HNO_{3}+H_{2}O\longrightarrow } } A g N O 3 + C O 2 ↑ + N H 4 N O 3 {\displaystyle \mathrm {AgNO_{3}+CO_{2}\uparrow +\ NH_{4}NO_{3}} } Justus Von Liebig Friedrich ...
carbamate = H2N-CO-O-. Other name(s): cyanate lyase; cyanate hydrolase; cyanase; cyanate aminohydrolase; cyanate C-N-lyase; cyanate hydratase Systematic name: carbamate hydro-lyase. Comments: This enzyme, which is found in bacteria and plants, is used to decompose cyanate, which can be used as the sole source of nitrogen [6,7]. Reaction (1) can be considered as the reverse of carbamate = cyanate + H2O, where this is assisted by reaction with bicarbonate and carbon dioxide (see mechanism above) [2], and hence is classified in sub-subclass 4.2.1. Bicarbonate functions as a recycling substrate [2].. Links to other databases: BRENDA, EXPASY, KEGG, Metacyc, PDB, UM-BBD, CAS registry number: 37289-24-0. References:. 1. Anderson, P.M. Purification and properties of the inducible enzyme cyanase. Biochemistry 19 (1980) 2882-2888. [PMID: 6994799]. 2. Johnson, W.V. and Anderson, P.M. Bicarbonate is a recycling substrate for cyanase. J. Biol. Chem. 262 (1987) 9021-9025. [PMID: 3110153]. 3. Taussig, A. The ...
Other articles where Ammonium cyanate is discussed: urea: …German chemist Friedrich Wöhler from ammonium cyanate in 1828 was the first generally accepted laboratory synthesis of a naturally occurring organic compound from inorganic materials. Urea is now prepared commercially in vast amounts from liquid ammonia and liquid carbon dioxide. These two materials are combined under high pressures and elevated…
Disclosed is the preparation of novel difunctional cyanate monomers with increased aromatic chain length between the cyanate groups and thermosetting re...
Escherichia coli can overcome the toxicity of environmental cyanate by hydrolysisof cyanate to ammonia and bicarbonate. This reaction is catalyzed by the enzymecyanase, encoded by the cynS gene. The nucleotide sequence of cynS has beenreported (Sung, Y.-c., Anderson, P. M., and Fuchs, J. A. (1987) J. Bacteriol.169, 5224-5230). The nucleotide sequence of the complete cyn operon has now been determined. The cyn operon is approximately 2600 base pairs and includes cynT,cynS, and cynX, which encode cyanate permease, cyanase, and a protein of unknown function, respectively. Two cyanate-inducible transcripts of 1500 and 2500nucleotides, respectively, were detected by Northern blot analysis. S1 nucleasemapping experiments indicated that two different cyn mRNAs have a common 5-endand two different 3-ends. One 3-end was located within the coding region ofcynX, whereas the other 3-end includes the entire DNA sequence of cynX. Thelonger transcript contained 98 nucleotides complementary to lac mRNA ...
Cyanate therapy of sickle-cell disease is currently under investigation. Since cyanate-treated erythrocytes have increased oxygen affinity, we studied the effect of chronic cyanate administration on tissue oxygen delivery in rats. Sodium cyanate (CNO) was administered for 8 weeks to two groups of rats. Thirty received 625 mg/kg body weight-week orally, and 30 received 250 mg/kg body weight-week intraperitoneally. Control animals received equivalent amounts of NaCl. Animals were killed at 2, 4, and 8 weeks, and blood oxygen affinity (P50), erythrocyte 2, 3-diphosphoglycerate (DPG), hematocrit, and erythrocyte mass were measured. Tissue oxygen delivery was assessed by skin bubble oxygen tension (SBpO2). ...
Hamerton, I, Herman, H, Mudhar, AK, Chaplin, A and Shaw, SJ (2002) Multivariate analysis of spectra of cyanate ester/bismaleimide blends and correlations with properties ...
Hamerton, I, Herman, H, Rees, KT, Chaplin, A and Shaw, SJ (2001) Water uptake effects in resins based on alkenyl-modified cyanate ester-bismaleimide blends ...
after he obtained his doctorate in Medicine, Surgery, and Midwifery he was encouraged by the chemist Leopold Gmelin to continue his chemical investigations. At Gmelins suggestion Woehler sought a position in the laboratory of the Swedish chemist Berzelius. In the Swedish lab he pursued studies on his recently synthesized cyanic acid. This led to the preparation of silver cyanate which, in turn, would lead to a collaboration with Justus von Liebig and the discovery of the property of isomerism. Woehler continued his chemical studies and in 1828 reported the finding that the combination of potassium cyanate with ammonium sulfate led to the production of a compound that was identical in composition to that of the naturally occurring compound urea. In 1836 Woehler accepted a position at Goettingen where he proceeded to develop one of the great teaching laboratories of the world. Although he seemed destined to be a major force in the development of Organic Chemistry Woehler returned to his roots in ...
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Sodium Cyanate, Mono sodium phosphate, Disodium phosphate, Trisodium Phosphate and Dicalcium phosphate, Phosphates, Dextrin Fine Chemicals All. ...
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High molecular weight soluble aromatic polybenzoxazoles (PBO) were synthesized from various bis( ortho amino phenols) and aromatic diacid chlorides via solution step polymerization in Nmethyl- 2-pyrrolidone (NMP). It was demonstrated that reaction temperatures of about 0 Cor lower were highly desired in order to obtain high molecular weight polyhydroxy amides. It was postulated that this lower temperature prevented pyridine catalyzed side reactions with the phenol group, which would otherwise either limit molecular weight or produce branched or gelled structures. The polyhydroxy amides were successfully solution cyclized at elevated temperatures (170 C) and complete cyclization was demonstrated with reactions times of 6 hours or less. The reSUlting fluorinated PBO materials were soluble in amide solvents at concentrations of at least 150/0 at 25 C. The PBO based on terephthaloyl chloride and the 6F bis(o-aminophenols) (2,2- bis(3 -amino-4-hydroxypheny I )-1,1,1-3,3,3-hexafluoropropane was ...
The structure of this salt was verified by X-ray crystallography. The respective C−O and C−N distances are 1.174(8) and 1.192(7) Å, consistent with the O=C=N− description. NH4+ forms hydrogen bonds to N, not O.[1] The compound is notable as the precursor in the Wöhler synthesis of urea, an organic compound, from inorganic reactants.[2] ...
CAS 108-65-6 5124-30-1 60857-76-3 39444-87-6 593330-00-6 68132-85-4 70883-07-7 68954-66-5 55636-48-1 68540-56-7 4098-71-9 INTERSHIELD PRORECO CLEAR FINISH, PRA600 PART 1 acetic acid, 2-methoxy-1-methylethyl ester; (prpln glcl monmethl ethrmethylene bis(4-cyclohexylisocyanate); (diclyclohexylmethane-)methylene dicyclohexylene diisocyanate, oxirane, methyloxirane polymer;polyether polyol polymerpolyether polyol polymerpolyether polyol polymerpolyether polyol polymerpolyether polyol polymerpolyether polyol polymerpolyether polyol polymerisocyanic acid, methylene (3,5,5-trimethyl-3,1- cyclohexylene) ester; msds toxicity property
Chem.) A white amorphous substance, regarded as a polymeric modification of isocyanic acid. Cyamellone Cyamellone Cy*amel*lone (s[-i]*[a^]m[e^]l*l[=o]n ...
Cyanogen bromide (CNBr) is the most common method for preparing affinity chromatography to purify antibody because of its simplicity and mild pH conditions. CNBr reacts with the hydroxyl groups on agarose to form cyanate esters and imidocarbonates. These groups are reacted with primary amines in order to couple the protein onto the agarose matrix. - Antibody Purification (Affinity) - AbVideo™ - Support - Abnova
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Here you can find all of the regulations and regulatory lists in which this substance appears, according to the data available to ECHA. This substance has been found in the following regulatory activities (directly, or inheriting the regulatory context of a parent substance):. ...
View mouse Hexim1 Chr11:103116231-103119725 with: phenotypes, sequences, polymorphisms, proteins, references, function, expression
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A shop worker suffered a fractured jaw and lost several teeth after tripping over a crack on a public footpath on her way to work.
TY - JOUR. T1 - Autoradiographic analyses of Guinea pig airway tissues following inhalation exposure to C-labeled methyl isocyanate. AU - Kennedy, Amy L.. AU - Singh, Gurmukh. AU - Alarie, Yves. AU - Brown, William E.. PY - 1993/1/1. Y1 - 1993/1/1. N2 - Through the use of radioactively labeled methyl isocyanate (MIC), the deposition, penetration, and clearance of this highly reactive compound in the airway at the tissue and cellular levels have been directly examined. Guinea pigs were exposed to 14C-MIC vapors at concentrations ranging from 0.38 to 15.2 ppm for periods of 1-6 hr. Solubilization of tissues from these animals showed the airway tissues to have the highest level of radioactivity. In the nasal region, 14C deposition, as monitored by histoautoradiography, was limited to the epithelial layer, was related to dose, and was dependent on the specific epithelial cell type. The squamous epithelium was minimally labeled on the surface and the label did not penetrate the cell layer. However, ...
Transparency Market Research has released a new market report titled Toluene Diisocyanate Market - Global Industry Analysis, Size, Share, Growth, Trends and Forecast 2015 - 2023. According to the report, the global toluene diisocyanate market was valued at US$ 6.72 Bn in 2014 and is likely to reach US$ 10.27 Bn in 2023, expanding at a CAGR of 4.8% from 2015 to 2023. In terms of volume, demand for toluene diisocyanate stood at 2,231.5 kilo tons in 2014.Toluene diisocyanate is one of the primary raw materials used in the production of polyurethane products across the globe. The toluene diisocyanate market is segmented based on product types such as flexible foam, rigid foam, coatings, adhesives & sealants, and elastomers. Flexible foam was the largest application segment in the global toluene diisocyanate market, accounting for about 80% share in 2014 ...
This research was presented in two papers: First Detection of Methyl Isocyanate (CH3NCO) in a solar-type Protostar by R. Martín-Doménech et al. and The ALMA-PILS survey: Detection of CH3NCO toward the low-mass protostar IRAS 16293-2422 and laboratory constraints on its formation, by N. F. W. Ligterink et al.. Both papers will appear in the same issue of the Monthly Notices of the Royal Astronomical Society.. One team is composed of: R. Martín-Doménech (Centro de Astrobiología, Spain), V. M. Rivilla (INAF-Osservatorio Astrofisico di Arcetri, Italy), I. Jiménez-Serra (Queen Mary University of London, UK), D. Quénard (Queen Mary University of London, UK), L. Testi (INAF-Osservatorio Astrofisico di Arcetri, Italy; ESO, Garching, Germany; Excellence Cluster Universe, Germany) and J. Martín-Pintado (Centro de Astrobiología, Spain).. The other team is composed of: N. F. W. Ligterink (Sackler Laboratory for Astrophysics, Leiden Observatory, the Netherlands), A. Coutens (University College ...
OBJECTIVES: The pathogenic basis of respiratory disorders associated with isocyanates are still obscure. One reason for this is the lack of good estimates of human exposure. In this study exposure was estimated by measurement of isocyanate metabolites in biological samples. METHODS: In a factory using isocyanate based polyurethane (PUR) glue, isocyanate concentrations in air were measured by liquid chromatography. Samples from 174 employees were analysed for metabolites of 4,4-methylene diphenyl diisocyanate (MDI) in plasma (P-MDX) and urine (U-MDX). After hydrolysis, 4,4-methylenedianiline was measured by gas chromatography-mass spectrometry (GC-MS). The employees were screened for work related respiratory symptoms and tested for specific immunoglobulin E (IgE) and IgG antibodies directed against isocyanate conjugated to human serum albumin. RESULTS: The time weighted isocyanate concentrations in air were low (MDI , 0.2-7; hexamethylene diisocyanate (HDI) , 0.1-0.7; 2,6-toluene diisocyanate ...
Poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) was blended with poly(lactic acid) (PLA) with various reactive processing agents to decrease its brittleness and enhance its processability. Three diisocyanates, namely, hexamethylene diisocyanate, poly(hexamethylene diisocyanate), and 1,4-phenylene diisocyanate, were used as compatibilizing agents. The morphology, thermomechanical properties, and rheological behavior were investigated with scanning electron microscopy, thermogravimetric analysis, differential scanning calorimetry, tensile testing, dynamomechanical thermal analysis in torsion mode (dynamic mechanical analysis), and oscillatory rheometry with a parallel-plate setup. The presence of the diisocyanates resulted in an enhanced polymer blend compatibility; this led to an improvement in the overall mechanical performance but did not affect the thermal stability of the system. A slight reduction in the PHBV crystallinity was observed with the incorporation of the diisocyanates. The ...
12 Senthilkumar CS, Malla TM, Sah NK, Ganesh N. Methyl isocyanate exposure and atypical lymphocytes. Int J Occup Environ Med 2013; 4(3):167-168.-1313 Senthilkumar CS, Akhter S, Malla TM, Sah NK, Ganesh N. Increased micronucleus frequency in peripheral blood lymphocytes contributes to cancer risk in the methyl isocyanate-affected population of Bhopal. Asian Pac J Cancer Prev 2015; 16(10):4409-4419.. For the past three decades, the government and non-government organizations have been striving to understand the MIC-induced late effects in the BMAP. A large body of peer-reviewed epidemiological, clinical, and experimental evidence accumulated from case-only, case-control, and cohort studies have substantiated the MIC-induced late effects. Several clinical studies show respiratory complications in the MIC-exposed survivors. A retrospective observation of spirometry indicates the relative risk of pulmonary function anomalies amongst young survivors of the disaster. Smoking habits appeared to ...
We report 3D printing of a pure thermal cure cyanate ester for the fabrication of robust 3D printed structures through the formulation, tailoring and post processing of a custom ink for Direct Ink Writing. Printed structures exhibit impressive thermo-oxidative stability, mechanical response.
The present invention is directed to an aqueous polyisocyanate dispersion which has an isocyanate content of at least 0.5% by weight, based on the weight of the polyisocyanate, and is prepared by a) dispersing in water a polyisocyanate which has an isocyanate content of at least 12% by weight and b) reacting the dispersed polyisocyanate with i) a primary or secondary monoamine containing at least one hydroxyl group in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.7:1.0 and ii) a polyamine having primary and/or secondary amino groups and a molecular weight of 400 or less in an amount sufficient to provide an equivalent ratio of amino groups to isocyanate groups of 0.1:1.0 to 0.4:1.0, wherein component i) is mixed with the dispersed polyisocyanate either before or during the mixing of component ii) and provided that the equivalent ratio of amino groups from both components i) and ii) does not exceed 0.95:1.0. The present invention is also directed
Looking for online definition of isocyanate or what isocyanate stands for? isocyanate is listed in the Worlds largest and most authoritative dictionary database of abbreviations and acronyms
TDI 80/20(Toluene diisocyanate),Place of Origin:Hebei China (Mainland) and Other Details of TDI 80/20(Toluene diisocyanate),TDI on Organic Intermediate from China (Mainland) - Wuqiang County Huiquan Dyestuff Chemicals Co., Ltd.
Extra info for Chemistry of Heterocyclic Compounds: The Purines, Supplement 1, Volume 54. Sample text. C. D. E. F. G. 2. 3. 4. 5. . . . . . . . . . 22 Cyclization with Formic Acid (H33) . . . . . . . . . . . . . . Cyclization with Dithioformic Acid (H38) . . . . . . . . . . . . Cyclization with Other Carboxylic Acids (H41) . . . . . . . . . . . Cyclization with Acid Anhydrides (H44) . . . . . . . . . . . . Cyclization with Acid Chlorides (H47) . . . . . . . . . . . . . Cyclization with Orthoesters and Diethoxymethyl Acetate (H50) . It is postulated that 63 arises from attack by a second molecule of thiourea on the 5-thioureidopyrimidine initially formed, displacing the 4-amino group; the product (64)then cyclizes with elimination of g ~ a n i d i n e . ~ ~ 59 60 61 0. Cyclizationwith Cyanates, lsocyanates and Derivatives (H61) Under reflux conditions methyl isocyanate and 4,5-diamino-l,2,3,6-tetrahydro-2-oxo-6-thioxopyrimidinein pyridine (3 h) give the corresponding 5-(N- * Removal of an ...
4-Methylbenzyl isocyanate 56651-57-1 route of synthesis, 4-Methylbenzyl isocyanate chemical synthesis methods, 4-Methylbenzyl isocyanate synthetic routes ect.
4-tolyl isocyanate 622-58-2 route of synthesis, 4-tolyl isocyanate chemical synthesis methods, 4-tolyl isocyanate synthetic routes ect.
o-Tolyl isocyanate, 99+%, ACROS Organics™ 10g; Glass bottle o-Tolyl isocyanate, 99+%, ACROS Organics™ Nitrogen Compounds
By Kavita Krishnan. July 2010 -- Liberation -- More than 25 years after the infamous Bhopal gas disaster, the verdict of a trial court in Bhopal is nothing but a cruel mockery of justice. With charges already diluted by the Supreme Court of India, the June 7 trial court verdict could only be a formal burial of justice. Not only does the verdict insult the victims of one of the worlds worst industrial disasters by letting off, either scot-free or with a ridiculously light sentence, the mighty CEOs who were the chief perpetrators, it amounts to an assurance to multinational corporations that they will enjoy total impunity in India even when their negligence and violations of regulations leads to the loss of thousands of Indian lives and injury to several thousand more. On December 2-3, 1984, 40 tonnes of methyl isocyanate (MIC) leaked out of the Union Carbide Corporations pesticide plant in Bhopal, exposing more that 5,000,000 people to the toxic fumes. As many as 25,000 people have died as a ...
If the answer is Yes to any of these questions, then you may wish to contact DeMarco, Negle & Lane LLP for further information at the email address of [email protected] Please use the subject isocyanate in your email. Emails will give the sender the opportunity to schedule a direct attorney client communication, but the email alone is only an initial inquiry and cannot be used for any other purpose.. If you have worked in any of the industries described in this article, you may be entitled to receive compensation for an isocyanate related injury. Contact DeMarco, Negle & Lane LLP to become informed of the special Isocyanate exposure project and rights to receive compensation for injuries caused by isocyanate exposure.. APPENDIX:. Isocyanates are a group of chemicals that are highly reactive and have a low molecular weight. They are in wide and persistent use in the production and manufacturing of flexible foam products, rigid foam products, chemical based fibers, and chemical based ...
The reactions of chlorosulphonyl isocyanate with cyclic 1, 3-dienes gave thermally unstable N-chlorosulphonyl B-lactams which were intercepted by reduction to the corresponding stable NH-B-lactams. The exclusively Markovnikov orientation of the addition suggests a considerable degree of dipolar character in the transition state. Stepwise rearrangement of the initial 1, 2-addition products to thermodynamically more stable 1, 4-addition or substitution products was observed and the assignment of these products is discussed. The invertomer ratios and activation energies for inversion at nitrogen in several 2-chloro-2-zabicyclo [2, 2, 17] and [2, 2, 2] systems, derived from rearrangement products obtained in the reactions of chlorosulphonyl isocyanate with 1, 3-cyclopentadiene and 1, 3-cyclohexadiene, were determined using variable temperature n.m.r. spectroscopy. The assignment of the invertomers, and factors influencing the invertomer ratio and activation energy for inversion at nitrogen in ...
The report firstly introduced 4-Chlorophenyl Isocyanate basic information included 4-Chlorophenyl Isocyanate definition classification application industry
China Isocyanate manufacturers - Select 2017 high quality Isocyanate products in best price from certified Chinese Building Coating manufacturers, Waterproof Coating suppliers, wholesalers and factory on Made-in-China.com
We investigated whether late asthmatic reactions and the associated increase in airway responsiveness induced by toluene diisocyanate (TDI) in sensitized subjects are inhibited by indomethacin and/or prednisone. Four sets of experiments were conducted in five subjects sensitized to TDI. To assess late asthmatic reactions to TDI, FEV1 was measured immediately before and after exposure to TDI and then hourly for 8 h. To assess change in airway responsiveness, the provocative dose (mg) of methacholine that caused a decrease in FEV1 of 20% (PD20FEV1) before treatment, and then before and after exposure to TDI was measured. In the first set of experiments, each subject was given no treatment and was studied before and 8 h after exposure to TDI; in the other two sets, each subject was studied before treatment, then during treatment with indomethacin (50 mg q.i.d. for 3 days, orally) or prednisone (50 mg once a day, for 3 days, orally), both before and 8 h after TDI exposure. In a fourth series of ...
What Community is this book trying describe? It is certainly not Bhopal, in India, where in 1984 a release of methyl isocyanate from a chemical plant operated by an affiliate of Union Carbide Corporation killed at least 4,000 people and (according to the Indian government) left some 50,000 people permanently injured and unable to work. It is certainly not Butte, Montana, where much of the old mining community is now a Superfund site that dramatically exemplifies the problem of acid mine drainage, a problem that is common in much of the American West. Within a short walk from the center of Butte, residents and visitors can gaze on the Berkeley Pit -- an open pit, about a mile in diameter, that now is flooded with some 30 billion gallons of mine-drainage water. This water, which stands 700 feet deep above 200 feet of sediment, is very acidic and has 107 ppm of aluminum, 150 ppm of iron, 159 ppm of zinc, 49 ppm of copper and 1 ppm of cadmium, among other things. In 1995, 342 snow geese landed on ...
Clinical significance of specific IgG and IgE antibodies to toluene diisocyanate (TDI)-human-serum albumin (HSA) conjugate in TDI-induced occupational asthma. ...
Exposure to toluene diisocyanate (TDI), an industrially important crosslinking agent used in the production of polyurethane products, can cause asthma in sensitive workers. Albumin has been identified as a major reaction target for TDI in vivo, and TDI-albumin reaction products have been proposed to serve as exposure biomarkers and to act as asthmagens, yet they remain incompletely characterized.
Toluene Diisocyanate Market is anticipated to reach USD XX.X MN by 2026, this market report provides the future growth, trends, key players & forecast of the market based on in-depth research by industry experts. The global market share, size along with dynamics are covered in the TDI Market Report
Toluene Diisocyanate Industry Outlook in Japan to 2019 - Market Size, Company Share, Price Trends, Capacity Forecasts of All Active and Planned PlantsBriefGlobalDatas ...
This page contains information on the chemical Toluene diisocyanate including: 90 synonyms/identifiers; U.S. Code of Federal Regulations Title 49 Section 172 shipping regulations and proper shipping name; USDOT 2008 Emergency Response Guidebook initial response information.
Receive supply/demand analysis of current China markets for Toluene Diisocyanate with 10-year demand forecasts, future trends, and 20-year historical data
Can I ask you something? Where do you get your chemicals? Because me, I like to shop around. A strip of magnesium here, a vial of sulphuric acid there. Often, in idle moments, I have wondered why the makers of chemicals do not compete more vigorously for my custom. A couple of television commercials during Emmerdale, say, or Channel 4 News, and next time I fancied some, oooh, methyl isocyanate, Id know exactly where to . . .. No. Very few people buy raw chemicals. I dont know how you would best go about targeting their attention (phone them? Do lunch?), but my hunch would be that spending £7 million to wrap your name around the London Olympic stadium is, relatively speaking, quite an inefficient…. ...
Food (cassava) linamarin is metabolized into neurotoxicants cyanide and cyanate, metabolites of which we sought to elucidate the differential toxicity effects on memory. Young 6-8 weeks old male rats were treated intraperitoneally with either 2.5 mg/kg body weight (bw) cyanide (NaCN), or 50 mg/kg bw cyanate (NaOCN), or 1 μl/g bw saline, daily for 6 weeks. Short-term and long-term memories were assessed using a radial arm maze (RAM) testing paradigm. Toxic exposures had an influence on short-term working memory with fewer correct arm entries (F 2, 19 = 4.57 p , 0.05), higher working memory errors (WME) (F 2, 19 = 5.09, p , 0.05) and longer RAM navigation time (F 2, 19 = 3.91, p , 0.05) for NaOCN relative to NaCN and saline treatments. The long-term working memory was significantly impaired by cyanide with fewer correct arm entries (F 2, 19 = 7.45, p , 0.01) and increased working memory errors (F 2, 19 = 9.35 p , 0.05) in NaCN relative to NaOCN or vehicle treated animals. Reference memory was not ...
Isophorone diisocyanate, 98%, ACROS Organics™ 1L; Glass bottle Isophorone diisocyanate, 98%, ACROS Organics™ Isa to Isopropylamin -Organics
13. OCI Company Ltd. Analyses of the global Isocyanates market trends along with the projections of CAGRs (compound annual growth rates) are provided in the research report. To estimate the overall market size of Isocyanates, its application, and regions-in terms of value and volume-the bottom-up approach is followed. On the other hand, to corroborate the overall Isocyanates market size-again in terms of value and volume-the top-down approach is followed. Following the method of data triangulation and data validation via primaries, the precise values of the parent market and individual market in terms of size are calculated and established in the report.. This market research report provides the client with comprehensive market analysis of the Isocyanates market over the forecast period. In addition, it also furnishes a general idea of the challenges, drivers, and restraints that have direct or indirect impact on the industry. It further highlights the market, the industry, and latest technology ...
Presumably after the phenyl group migrates and expels the cyanate, it then attacks the nitrillium ion formed. In carbon tetrachloride the isocyanate can be isolated, whereas in ethanol the urethane is formed after solvolysis of the isocyanate. One computational study has established the mechanism accounting for solvent molecules and substituents.[6] The rearrangement of acetone oxime in the Beckmann solution involved three acetic acid molecules and one proton (present as an oxonium ion). In the transition state leading to the iminium ion (σ-complex), the methyl group migrates to the nitrogen atom in a concerted reaction as the hydroxyl group is expelled. The oxygen atom in the hydroxyl group is stabilized by three acetic acid molecules. In the next step the electrophilic carbon atom in the nitrilium ion is attacked by water and a proton is donated back to acetic acid. In the transition state leading to the imidate, the water oxygen atom is coordinated to 4 other atoms. In the third step, an ...
Laboratory grade 4-Fluorophenethyl isocyanate - 65535-53-7 from Georganics for your specific research needs. Check more product details and SDS.
[109 Pages Report] Check for Discount on Global Isocyanate Market Professional Survey Report 2016 report by QYResearch Group. This report mainly covers the following Segment regions including (the...
Buy 2,3-Dimethylphenyl isocyanate (CAS 1591-99-7), a product for proteomics research, from Santa Cruz. Molecular Formula: (CH3)2C6H3NCO, MW: 147.17
Sigma-Aldrich offers Aldrich-144452, tert-Butyl isocyanate for your research needs. Find product specific information including CAS, MSDS, protocols and references.
The present invention relates to two-component adhesive for bonding wood materials.. Previously polyurethane adhesives used for bonding wood materials, including, in particular, bearing glued wooden structures (wooden building structures), such as, for example, structural elements (laminated wooden beams, wall elements and so on). In such applications are used as two-component and one-component curing in a moist environment, adhesives. In the case of the latter system after application of the adhesive passes the initial reaction between isocyanates and moisture from the ambient air or substrate: part used isocyanate with the release of carbon dioxide is formed corresponding amine and then it reacts with the isocyanate with the formation of urea due to release of CO2.. The reaction of aromatic isocyanates with hydroxyl groups (water or alcohols) by several orders of magnitude faster than the corresponding aliphatic isocyanates. However, the aromatic system makes aromatic isocyanates are sensitive ...
We report an experimental study of low-frequency (similar to 10 kHz) self-pulsing of the output intensity in a high-concentration erbium-doped fiber laser. We suggest that the fast intensity fluctuations caused by multimode and polarization instabilities play the role of an external noise source, leading to low-frequency auto-oscillations through a coherence resonance scenario.. ...
The test substance is covered by the category approach of methylenediphenyl diisocyanates (MDI). Hence, data of the category substances can be used to cover this endpoint. Yakabe et al (1994) found that for loadings of 400 - 10,000 mg/L, and under heterogeneous conditions, oligomeric MDI had a half-life of ca. 20h at 25°C when the disappearance rate was fitted to a zero-order kinetic model. However the rate constant increased approximately linearly with the nominal concentration of oligomeric MDI for all constituents. For the two-ring constituents the rate constant was found to be 0.5h-1 (i.e. half-life = 1.4 hour) for a loading of 1000 mg/L oligomeric MDI. The findings in the Yakabe et al (1994) study concur with the generally accepted chemistry of hydrolysis of an isocyanate whereby the initially produced carbamate decarboxylates to amine which then reacts very readily with more isocyanate to produce a urea. For a diisocyanate of low solubility such as MDI, the reaction system is usually ...
Concerns over exposure to residual isocyanates led to new limits for residual isocyanates in new products. PAT for continuous measurement of NCO is now available.
Specification: Purity: 99.5% wt% MIN Color (APHA):50 MAX Acid (as HCL):0.008% MAX Hydrolyzable Chloride: 0.01wt% MAX Isomer Raion(2.4/2.6): 80±2/20±2
[102 Pages Report] Check for Discount on Global Aliphatic Isocyanates Sales Market Report 2017 report by QYResearch Group. In this report, the global Aliphatic Isocyanates market is valued...
A depilatory composition comprising a source of cyanate ion, an organic acid or a salt thereof and a peroxide compound; and methods of removing hair from the skin using such compositions.
As the substance XDI is a diisocyanate, it reacts with water. Isocyanates hydrolyze readily in water to yield a carbamic acid, which decarboxylates to produce CO2 and an amine (XDA); the latter can immediately react with more isocyanate to yield a disubstituted urea. The hydrolysis rate increases with electron-withdrawing substituents. Steric hindrance also influences hydrolysis rate. Even at low pHs, hydrolysis Half-Life , 10 minutes (25 deg C) have been found for isocyanates (from Ullmanns Encyclopedia). ...
A pensioner who collapsed at home alone was saved by two betting shop workers who noticed he had failed to place his twice-daily £1 bet.
Sales and margins in BASF monomers division, home to its isocyanates business, rose considerably in the third quarter of 2017
Vencorex announced that it is expanding the capacity for its aliphatic isocyanates product range, including HDI, IPDI, Tolonate and Easaqua grades, as well as new products. According to the company, several industrial projects will enhance its ability to serve the growing market for years to come.
... is analogous to the cyanate ion, [OCN]−, wherein oxygen is replaced by sulfur. [SCN]− is one of the pseudohalides, ... Guy, R. G. (1977). "Syntheses and Preparative Applications of Thiocyanates". In Patai, S. (ed.). Chemistry of Cyanates and ...
... as well as between thiols and cyanates. Alternatively, they arise by the reaction of amines with carbonyl sulfide. 2 R2NH + COS ...
Ammonium cyanate is urea." In fact, this was incorrect. These are two different chemicals with the same overall chemical ... Urea can also be produced by heating ammonium cyanate to 60 °C. NH4OCN → (NH2)2CO Urea was first noticed by Herman Boerhaave in ... Shorter, J. (1978). "The conversion of ammonium cyanate into urea-a saga in reaction mechanisms". Chemical Society Reviews. 7 ( ... Isocyanic acid results from the thermal decomposition of ammonium cyanate, which is in chemical equilibrium with urea: NH2CONH2 ...
Also cyanate, isocyanate, thiocyanate, fulminate. Sulfur oxoanions, thioacetate, thiolates. Chlorosulfate, chloroacetate, etc. ...
The metabolite is generated from a lysine residue after lysine reacts with cyanate. Cyanate is present in the human body in ... This enzyme converts thiocyanate to cyanate. Increased levels of cyanate can now carbamylate lysine residues. Myeloperoxidase ... 2001 Mar 24;131(11-12):139-4. Kraus LM, Elberger AJ, Handorf CR, Pabst MJ, Kraus AP Jr: Urea-derived cyanate forms epsilon- ... Myeloperoxidase can use SCN− as a cosubstrate together with hydrogen peroxide (H2O2) to form cyanate. In patients with kidney ...
"Ueber einige Reaktionen der aromatischen Cyanate". Berichte der deutschen chemischen Gesellschaft. 18: 873-877. doi:10.1002/ ...
Frederick Kurzer (1951). "Arylureas I. Cyanate Method p-Bromophenylurea". Org. Synth. 31: 8. doi:10.15227/orgsyn.031.0008. Roy ... NaCl The artificial sweetener dulcin is produced by the condensation of ethoxyaniline with potassium cyanate. Si(NCO)4 is also ... unsymmetrical primary ureas are generated by condensation of ammonium salts and alkali metal cyanates: Na+NCO− + [R2NH2]Cl → ( ...
... can be used to detoxify cyanide wastes (for example from gold and silver mining) by oxidizing cyanide to cyanate and ... Ozone will also detoxify cyanides by converting them to cyanates. CN− + O3 → CNO− + O2 Ozone will also completely decompose ...
As a chemolithoautotroph, Nitrososphaera gargensis performs aerobic oxidation of ammonia to nitrite and breaks down cyanate for ... "Cyanate as an Energy Source for Nitrifiers". Nature. 524 (7563): 105-08. Bibcode:2015Natur.524..105P. doi:10.1038/nature14856. ... or urea and potentially cyanate as other sources of ammonia. Nitrososphaera gargensis was discovered in a Garga hot spring and ...
Mercury(II) cyanate, though its chemical formula is identical, has a different atomic arrangement; the cyanate and fulminate ... 4 Hg(CNO)2 → 2 CO2 + N2 + HgO + 3 Hg(OCN)CN Hg(CNO)2 → 2 CO + N2 + Hg Hg(CNO)2 → :Hg(OCN)2 (cyanate or / and isocyanate) 2 Hg( ...
Caro's acid - peroxomonosulfuric acid (H2SO5) - converts cyanide to cyanate. Cyanate then hydrolyses to ammonium and carbonate ... The INCO-licensed process and the Caro's acid process oxidise the cyanide to cyanate, which is not as toxic as the cyanide ion ... Over 90 mines worldwide now use an Inco SO2/air detoxification circuit to convert cyanide to the much less toxic cyanate before ... Remaining free cyanide degrades in the pond, while cyanate ions hydrolyse to ammonium. Studies show that residual cyanide ...
Kessler, Michael R. (2012). "Cyanate Ester Resins adapted from Cyanate Ester Resins". Wiley Encyclopedia of Composites. doi: ... The reaction of bisphenols or multifunctional phenol novolac resins with cyanogen bromide or chloride leads to cyanate ... When postcured, all residual cyanate ester functionality polymerises by cyclotrimerisation leading to tightly crosslinked ... Cyanate ester resin prepregs combine the high temperature stability of polyimides with the flame and fire resistance of ...
Compared to other organic cyanates, MDI has a relatively low human toxicity. It is a potentially violently reactive material ...
In alkaline solutions tricyanomethanide and cyanate ions are produced. Tricyanomethane (cyanoform) Barnes, D.S.; Mortimer, C.T ...
... in space applications when they are cyanate-ester-based; in auto body and outdoor equipment repairs when they are epoxy-based. ...
Wentrup, C.; Bornemann, H. (2005). "Curtius rearrangment of acyl azides revisited - formation of cyanate". Eur. J. Org. Chem.: ...
Urea and ammonium cyanate are further examples of structural isomers of chemical compounds. Heating ammonium cyanate converts ... Silver fulminate is explosive, while silver cyanate is a stable compound. Liebig and Wöhler recognized these as being examples ... Liebig and Wöhler investigated silver fulminate and silver cyanate. These two compounds have the same chemical composition, yet ... a pioneer in organic chemistry as a result of his 1828 demonstration of the laboratory synthesis of urea from ammonium cyanate ...
The process uses a salt bath of alkali cyanate. This is contained in a steel pot that has an aeration system. The cyanate ... The bath is then treated to convert the carbonate back to a cyanate. The surface formed from the reaction has a compound layer ... This is done to minimize distortion and to destroy any lingering cyanates or cyanides left on the workpiece. Other trademarked ...
Because cyanate esters are more reactive than are cyclic imidocarbonates, the amine will react mostly with the ester, yielding ... The cyanide can then be oxidized by sodium or calcium hypochlorite to the less toxic cyanate ion. Note that deactivation is ... Cyanogen bromide is also often used because it reacts with the hydroxyl groups on agarose to form cyanate esters and ... Cyanogen bromide can be used to prepare aryl nitriles, nitriles, anhydrides, and cyanates. It can also serve as a cleaving ...
Reaction of Photogenerated Vinyl Cations with Cyanate and Thiocyanate Ions". Journal of Organic Chemistry. 55 (6): 1801-1805. ...
These include carbon dioxide, carbon disulfide, carbon diselenide, cyanate, thiocyanate. Some definitions of heterocumulenes ...
Well-known pseudohalogen functional groups include cyanide, cyanate, thiocyanate, and azide. Many pseudohalogens are known by ... cyanates, fulminate, rhodanide and azide. A common complex pseudohalide is a tetracarbonylcobaltate [Co(CO) 4]− . The acid HCo( ...
... a combination of lead cyanate and ammonia and finally from a combination of mercury cyanate and cyanatic ammonia (which is ... The actual reaction taking place is a double displacement reaction to form ammonium cyanate: Pb ( OCN ) 2 + 2 NH 3 + 2 H 2 O ⟶ ... The Wöhler synthesis is the conversion of ammonium cyanate into urea. This chemical reaction was described in 1828 by Friedrich ... Although the Wöhler reaction concerns the conversion of ammonium cyanate, this salt appears only as an (unstable) intermediate ...
Most of these syntheses involve replacing the chloride with alcohols, thiols, amines, and cyanates, respectively. Imidoyl ...
nov., capable of growth on thiocyanate or cyanate as sole nitrogen sources". Archives of Microbiology. 169 (2): 148-58. doi: ... nov., capable of growth on thiocyanate or cyanate as sole nitrogen sources". Archives of Microbiology. 169 (2): 148-58. doi: ...
Lu, Y., Wang, H., Xie, Y., Liu, H. and Schaefer, H. F. (2014) 'The cyanate and 2-phosphaethynolate anion congeners ECO-(E = N, ... The same applies for the cyanate anion hence why PCO is observed to have similar pseudo-halogenic behaviour. Coordination via ... The phosphaethynolate anion is the phosphorus-containing analogue of the cyanate anion with the chemical formula [PCO]− or [OCP ... The phosphaethynolate anion is the heavier isoelectronic congener of the cyanate anion. It has been shown that it behaves in a ...
... in the presence of cyanate, and so he postulated that the cyanate facilitated the carbamylation of amino groups in the urea ... Essentially, cyanate reacts with the amino groups and exposes them in order for them to react with acid and form hydantoins, ... He did significant work with cyanate, which can be produced from urea. His experiments set out to explain why enzymatic ... Stark, George R.; Smyth, Derek G. (January 1963). "The Use of Cyanate for the Determination of NH2-terminal Residues in ...
Many lead(II) pseudohalides are known, such as the cyanide, cyanate, and thiocyanate. Lead(II) forms an extensive variety of ...
Stark GR, Stein WH, Moore X (1960). "Reactions of the Cyanate Present in Aqueous Urea with Amino Acids and Proteins". J Biol ...
Schmuck, Arno; Seppelt, Konrad (February 1987). "Sulfur Pentafluoride Cyanate, F5S-O-C≡N". Angewandte Chemie International ...
Compounds that contain the group −O−C≡N, are known as a cyanates, or cyanate esters. Aryl cyanates such are phenyl cyanate, ... A cyanate ester is an organic compound containing the cyanate group. The cyanate ion is an ambidentate ligand, forming ... In N-bonded cyanate complexes the M−NCO unit sometimes has a linear structure, but with O-bonded cyanate the M−O−C unit is bent ... Sodium cyanate is isostructural with sodium fulminate, confirming the linear structure of the cyanate ion. It is made ...
Silver cyanate is the cyanate salt of silver. It can be made by the reaction of potassium cyanate with silver nitrate in ... with the cyanate ions perpendicular to that axis. Silver cyanate reacts with nitric acid to form silver nitrate, carbon dioxide ... analogous to the reaction used for the industrial production of sodium cyanate, may be used. Silver cyanate is a beige to gray ... 1965). 18, 424-428, doi:10.1107/S0365110X65000944 J. Milbauer: Bestimmung und Trennung der Cyanate, Cyanide, Rhodanide und ...
Ammonium cyanate is an inorganic compound with the formula NH4OCN. It is a colorless solid. ... Shorter, J. (1978). "The conversion of ammonium cyanate into urea. A saga in Reaction mechanisms". Chemical Society Reviews. 7 ... "Ammonium cyanate shows N-H···N hydrogen bonding, not N-H···O". Journal of the American Chemical Society. 125: 14449-14451. doi: ... Retrieved from "https://en.wikipedia.org/w/index.php?title=Ammonium_cyanate&oldid=840644401" ...
German chemist Friedrich Wöhler from ammonium cyanate in 1828 was the first generally accepted laboratory synthesis of a ... Other articles where Ammonium cyanate is discussed: urea: … ... to make the inorganic substance ammonium cyanate. To his ... German chemist Friedrich Wöhler from ammonium cyanate in 1828 was the first generally accepted laboratory synthesis of a ... complete surprise, he obtained a product that had the same molecular formula as ammonium cyanate but was instead the well-known ...
Potassium cyanate definition is - a crystalline salt KOCN made by oxidizing potassium cyanide or by heating a mixture of ... Share potassium cyanate Post the Definition of potassium cyanate to Facebook Share the Definition of potassium cyanate on ... Comments on potassium cyanate What made you want to look up potassium cyanate? Please tell us where you read or heard it ( ... Dictionary Entries near potassium cyanate. potassium chloride potassium chromate potassium cobaltinitrite potassium cyanate ...
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice ...
Giles, D. E. (1977) Kinetics and mechanisms of reactions of cyanates and related compounds, in Cyanates and Their Thio ...
Cyanate Magnesium Chloride Potassium Dihydrogen Cyanamide Adenosine Diphosphate These keywords were added by machine and not by ... Non-enzymatic ATP synthesis by the phosphorylation of ADP with the assistance of cyanate and magnesium ion. ...
... it was significantly less sensitive to the toxic effects of cyanate and could degrade cyanate and use cyanate as the sole ... and the mutant strain was unable to degrade cyanate and therefore could not use cyanate as the sole nitrogen source when grown ... A physiological role for cyanate-induced carbonic anhydrase in Escherichia coli.. M B Guilloton, A F Lamblin, E I Kozliak, M ... A physiological role for cyanate-induced carbonic anhydrase in Escherichia coli.. M B Guilloton, A F Lamblin, E I Kozliak, M ...
Red Cell Survival of Cyanate Reacted Sickle Cells. A. J. Bellingham, A. May, E. R. Huehns ... Red Cell Survival of Cyanate Reacted Sickle Cells Message Subject (Your Name) has forwarded a page to you from Clinical Science ...
Since cyanate-treated erythrocytes have increased oxygen affinity, we studied the effect of chronic cyanate administration on ... Sodium cyanate (CNO) was administered for 8 weeks to two groups of rats. Thirty received 625 mg/kg body weight-week orally, and ... Impaired O2 Delivery in Cyanate-Treated Animals. Anthony Melaragno, B.S.; Patrick W. Flanigan, M.D.; Philip A. Bromberg, M.D., ... Impaired O2 Delivery in Cyanate-Treated Animals.. Ann Intern Med. 1973;78:823. doi: 10.7326/0003-4819-78-5-823_2 ...
Cyanate. Description. The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom, [OCN ... The cyanate ion is an ambident nucleophile in nucleophilic substitution because it can react to form an alkyl cyanate R-OCN ( ... The cyanate ion possesses 1 unit of negative charge, borne mainly by the nitrogen atom. In organic compounds the cyanate group ... Cyanate can be decomposed by the enzyme cyanate lyase (or cyanase), which is found in bacteria and plants. In particular ...
... thermal cure cyanate ester for the fabrication of robust 3D printed structures through the formulation, tailoring and post ... 3D printing of high performance cyanate ester thermoset polymers S. Chandrasekaran, E. B. Duoss, M. A. Worsley and J. P. ... We report 3D printing of a pure thermal cure cyanate ester for the fabrication of robust 3D printed structures through the ...
Yellow Pages Directory of Sodium Cyanate, Sodium Cyanate manufacturers, Traders, and Sodium Cyanate, Sodium Cyanate Suppliers ... Find the list of best Sodium Cyanate suppliers & Manufacturers. ... Deals in Sodium Cyanate, Chemical Products Send Inquiry. View ... Deals in Sodium Cyanate, aniline 2 4 disulfonic acid, aniline 2 5 disulfonic acid ... Deals in Sodium Cyanate, Cement, Clinkers, Pig Iron, Rock Phosphate, Zinc Ash ...
Global and Chinese Potassium cyanate Industry, 2011-2021 Market Research Report is a professional and - Market research ... Global and Chinese Potassium cyanate Industry, 2016 Market Research Report The ... 8.3 Effects to Potassium cyanate Industry. Chapter Nine Market Dynamics of Potassium cyanate Industry. 9.1 Potassium cyanate ... 1.1 Brief Introduction of Potassium cyanate. 1.2 Development of Potassium cyanate Industry. 1.3 Status of Potassium cyanate ...
of cyanate ester was added.. *The cyclopentadienone possesses a deep purple color while the polymer is colorless. Therefore, UV ... Cyanate esters are also well renowned for their thermal stability as thermosetting materials. To combine these properties, Voit ... Hyperbranched polyphenylenes and cyanate esters are two unique classes of materials that possess complementary properties. On ... Different to fully phenylene-based systems which are difficult to analyze by 13C NMR spectroscopy, the reaction with cyanate ...
... cyanate is listed in the Worlds largest and most authoritative dictionary database of abbreviations and acronyms ... Looking for online definition of cyanate or what cyanate stands for? ... redirected from cyanate). Also found in: Dictionary, Medical, Encyclopedia, Wikipedia.. Related to cyanate: Ammonium cyanate, ... Cyanate - What does cyanate stand for? The Free Dictionary https://acronyms.thefreedictionary.com/cyanate ...
Disclosed is the preparation of novel difunctional cyanate monomers with increased aromatic chain length between the cyanate ... Difunctional Cyanates And Polymers Thereof. Disclosed is the preparation of novel difunctional cyanate. monomers with increased ... Disclosed is the preparation of novel difunctional cyanate monomers with increased aromatic chain length between the cyanate ... Difunctional Cyanates And Polymers Thereof. IP.com Disclosure Number: IPCOM000103347D Original Publication Date: 1990-Oct-01 ...
Failure to isolate Calcium Cyanate. Hey guys, just hoping for an explanation or insight into why my procedure isnt working. ... Adding acid to sodium cyanate will decompose it when hot for sure its also a terrible way to purify it,you need to dissolve in ... Im attempting to make pure calcium cyanate, so I did the urea/ sodium carbonate melt to collect a product of solid off-white ... To remove contaminants such as sodium carbonate, the crude sodium cyanate was dissolved in 50% hot acetic acid. The resulting ...
Water uptake effects in resins based on alkenyl-modified cyanate ester-bismaleimide blends ... Science & Technology, Physical Sciences, Polymer Science, POLYMER SCIENCE, cyanate ester, bismaleimide, blends, alkenyl ... Water uptake effects in resins based on alkenyl-modified cyanate ester-bismaleimide blends POLYMER INTERNATIONAL, 50 (4). pp. ... cyanates, reactive modifiers, water uptake, MECHANICAL-PROPERTIES, MONOMERS, POLYMERIZATION, POLYMERS, COMPOSITES Related URLs ...
Hamerton, I, Herman, H, Mudhar, AK, Chaplin, A and Shaw, SJ (2002) Multivariate analysis of spectra of cyanate ester/ ... Multivariate analysis of spectra of cyanate ester/bismaleimide blends and correlations with properties ... Science & Technology, Physical Sciences, Polymer Science, POLYMER SCIENCE, near infrared, chemometrics, cyanate ester ...
Compounds that contain the group −O−C≡N, are known as a cyanates, or cyanate esters. Aryl cyanates such are phenyl cyanate, C6H ... Cyanate salts[edit]. Sodium cyanate is isostructural with sodium fulminate, confirming the linear structure of the cyanate ion. ... Cyanate ion[edit]. The three atoms in a cyanate ion lie on a straight line, giving the ion a linear structure. The electronic ... Complexes with the cyanate ion[edit]. Cyanate is an ambidentate ligand which can donate the pair of electrons on the nitrogen ...
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Carburization of Iron by Cyanides and Cyanates. The use of Titanium in the Manufacture of Steel Castings. ...
4-methoxyphenyl cyanate ester, 4-nonylphenyl cyanate, 4-phenylphenyl cyanate, 4-cumylphenol cyanate ester, and phenyl cyanate. ... 4-methoxyphenyl cyanate ester, 4-nonylphenyl cyanate, 4-phenylphenyl cyanate, 4-cumylphenol cyanate ester, and phenyl cyanate. ... 4-methoxyphenyl cyanate ester, 4-nonylphenyl cyanate, 4-phenylphenyl cyanate, 4-cumylphenol cyanate ester, and phenyl cyanate. ... 4-nonylphenyl cyanate, 4-phenylphenyl cyanate, 4-cumylphenol cyanate ester, and phenyl cyanate. 5. The method for making shape ...
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... potassium cyanate and different grades of cyanates in volumes to cater to the demands of customers around the world. ... Potassium Cyanate & Sodium Cyanate : Exotic Associates started its operations as manufacturer of sodium cyanate and potassium ... Exotic Associates is exporters of sodium cyanate, potassium cyanate and different grades of cyanates in volumes to cater to the ... It has today, established its position as the major sodium cyanate and potassium cyanate provider in bulk to various herbicide ...
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  • Use of this fact is made in cyanide decontamination processes where oxidants such as permanganate and hydrogen peroxide are used to convert toxic cyanide to safer cyanate. (wikipedia.org)
  • 1965). 18, 424-428, doi:10.1107/S0365110X65000944 J. Milbauer: Bestimmung und Trennung der Cyanate, Cyanide, Rhodanide und Sulfide in Fresenius' Journal of Analytical Chemistry 42 (1903) 77-95, doi:10.1007/BF01302741. (wikipedia.org)
  • Use of this fact is made in cyanide decontamination processes where a permanganate oxidation converts toxic cyanide to safer cyanate. (hmdb.ca)
  • Therefore a distinction between free, WAD and total cyanide forms (other compounds such as cyanates or thiocyanates are also present) in tailings water is useful for legal regulatory purposes [8]. (thefreedictionary.com)
  • Cardiac blood was collected for cyanide and cyanate analysis. (duq.edu)
  • The findings of increased cyanate levels in 2-CAN, combined with the hind-limb paralysis data suggest that cyanate, not cyanide, is the toxic metabolic product resulting from acute 2-CAN exposure. (duq.edu)
  • This ebook Silver Azide, Cyanide, Cyanamides, Cyanate, Selenocyanate happens examples to organisation and tree becoming in statistical administrator considered by a dropdown of economists and structure companies and solid ' changes. (crowd-estate.de)
  • Na2CO3 + 2 OC(NH2)2 → 2 NaNCO + CO2 + 2 NH3 + H2O A similar reaction is used to make potassium cyanate. (wikipedia.org)
  • Material Safety Data Sheet for potassium cyanate Greenwood, Norman N. (wikipedia.org)
  • It can be made by the reaction of potassium cyanate with silver nitrate in aqueous solution, from which it precipitates as a solid. (wikipedia.org)
  • What made you want to look up potassium cyanate ? (merriam-webster.com)
  • The ' Global and Chinese Potassium cyanate Industry, 2011-2021 Market Research Report ' is a professional and in-depth study on the current state of the global Potassium cyanate industry with a focus on the Chinese market. (marketresearch.com)
  • The report provides key statistics on the market status of the Potassium cyanate manufacturers and is a valuable source of guidance and direction for companies and individuals interested in the industry.Firstly, the report provides a basic overview of the industry including its definition, applications and manufacturing technology. (marketresearch.com)
  • Through the statistical analysis, the report depicts the global and Chinese total market of Potassium cyanate industry including capacity, production, production value, cost/profit, supply/demand and Chinese import/export. (marketresearch.com)
  • The report then estimates 2016-2021 market development trends of Potassium cyanate industry. (marketresearch.com)
  • In the end, the report makes some important proposals for a new project of Potassium cyanate Industry before evaluating its feasibility. (marketresearch.com)
  • Overall, the report provides an in-depth insight of 2011-2021 global and Chinese Potassium cyanate industry covering all important parameters. (marketresearch.com)
  • 5.2 Market Competition of Potassium cyanate Industry by Country (USA, EU, Japan, Chinese etc. (marketresearch.com)
  • A similar reaction is used to make potassium cyanate . (marbk-65d.win)
  • Exotic Associates started its operations as manufacturer of sodium cyanate and potassium cyanate in 1995. (cyanate.net)
  • It has today, established its position as the major sodium cyanate and potassium cyanate provider in bulk to various herbicide & dye-intermediates manufacturing units in India. (cyanate.net)
  • Exotic Associates is exporters of sodium cyanate, potassium cyanate and different grades of cyanates in volumes to cater to the demands of its customers in india and around the world. (cyanate.net)
  • As a leading manufacturer of sodium cyanate and potassium cyanate from India, Exotic Associates is ready to fulfill your cyanates requirements in different qualities, and in small or bulk quantities. (cyanate.net)
  • We undertake custom synthesis and manufacture sodium and potassium cyanate on exclusive basis and under secrecy agreement. (cyanate.net)
  • Please enquire and contact us for further information on potassium cyanate and sodium cynate mentioning your specific requirements. (cyanate.net)
  • Especially-Potassium Cyanate) In the manufacture of Pharmaceuticals being used in the treatment of Parkinson's disease, Diabetes, Epilepsy and Others. (cyanate.net)
  • Note: Potassium Cyanate, due to its higher solubility value, gives better result in different types of chemical reactions. (cyanate.net)
  • It also refers to any salt containing it, such as ammonium cyanate. (wikipedia.org)
  • Silver cyanate reacts with nitric acid to form silver nitrate, carbon dioxide, and ammonium nitrate. (wikipedia.org)
  • Ammonium cyanate is an inorganic compound with the formula NH 4 OCN. (wikipedia.org)
  • Ammonium cyanate shows N-H···N hydrogen bonding, not N-H···O". Journal of the American Chemical Society . (wikipedia.org)
  • The conversion of ammonium cyanate into urea. (wikipedia.org)
  • German chemist Friedrich Wöhler from ammonium cyanate in 1828 was the first generally accepted laboratory synthesis of a naturally occurring organic compound from inorganic materials. (britannica.com)
  • to make the inorganic substance ammonium cyanate. (britannica.com)
  • To his complete surprise, he obtained a product that had the same molecular formula as ammonium cyanate but was instead the well-known organic compound urea. (britannica.com)
  • By showing that ammonium cyanate can become urea by an internal re-arrangement of its atoms, without gaining or losing in weight, Wohler furnished one of the first and best examples of isomerism. (thefreedictionary.com)
  • The cyn operon includes the gene cynS, encoding cyanase, which catalyzes the reaction of cyanate with bicarbonate to give ammonia and carbon dioxide. (asm.org)
  • In particular cyanate can be decomposed to carbamate (ammonia) and carbon dioxide. (hmdb.ca)
  • Alternately the same enzyme can be used to synthesize cyanate using carbamate and carbon dioxide. (hmdb.ca)
  • Cyanase is an enzyme found in bacteria and plants that catalyses the reaction of cyanate with bicarbonate to produce ammonia and carbon dioxide in response to extracellular cyanate [ PMID: 10801492 ]. (ebi.ac.uk)
  • Compounds that contain the group −O−C≡N, are known as a cyanates, or cyanate esters. (wikipedia.org)
  • Giles, D. E. (1977) Kinetics and mechanisms of reactions of cyanates and related compounds, in Cyanates and Their Thio Derivatives: Volume 1 (1977) (ed S. Patai), John Wiley & Sons, Ltd., Chichester, UK. (wiley.com)
  • In organic compounds the cyanate group is a functional group. (hmdb.ca)
  • belongs to the class of organic compounds known as cyanates. (hmdb.ca)
  • Then, this text presents the chemistry and chemical properties of the elements, specifically discussing topics such as the reactions of the metals, intermetallic compounds, hydrides, halides, cyanides and cyanates, and oxides and peroxides. (elsevier.com)
  • investigate the combination of cyanate esters with polyphenylenes through a Diels-Alder reaction. (rsc.org)
  • Hyperbranched polyphenylenes and cyanate esters are two unique classes of materials that possess complementary properties. (rsc.org)
  • Cyanate esters are also well renowned for their thermal stability as thermosetting materials. (rsc.org)
  • Thus, the resulting materials simultaneously possess the strengths of polyphenylene polymers while retaining the curing potential of the cyanate esters but at only the tenth of the activation energy of pure cyanate monomers, lowering the risk factors during handling. (rsc.org)
  • However, under these conditions the trimerisation reaction of cyanate esters also takes place. (rsc.org)
  • Phenolic, epoxy resins, cyanate esters, polyester resins, polyurethane and vinyl ester resins among others are the types of thermosets. (researchbeam.com)
  • This disclosure covers a new methodology to produce high performance, high temperature, thermoset resins having shape memory characteristics based on cyanate ester resins. (patentsencyclopedia.com)
  • I'm attempting to make pure calcium cyanate, so I did the urea/ sodium carbonate melt to collect a product of solid off-white sodium cyanate. (sciencemadness.org)
  • The cyanate ion is an ambidentate ligand, forming complexes with a metal ion in which either the nitrogen or oxygen atom may be the electron-pair donor. (wikipedia.org)
  • Cyanate is an ambidentate ligand which can donate the pair of electrons on the nitrogen atom or the oxygen atom, or both. (wikipedia.org)
  • However, the crystal structure of silver cyanate shows zigzag chains of nitrogen atoms and silver atoms. (wikipedia.org)
  • The nitrogen atoms are each coordinated to two silver atoms, so that there are zigzag chains of alternating silver and nitrogen atoms going in the direction of the monoclinic "b" axis, with the cyanate ions perpendicular to that axis. (wikipedia.org)
  • In contrast to the wild-type strain, the growth of the delta cynT strain was inhibited by cyanate, and the mutant strain was unable to degrade cyanate and therefore could not use cyanate as the sole nitrogen source when grown at a partial CO2 pressures (pCO2) of 0.03% (air). (asm.org)
  • it was significantly less sensitive to the toxic effects of cyanate and could degrade cyanate and use cyanate as the sole nitrogen source for growth. (asm.org)
  • The cyanate ion is an anion consisting of one oxygen atom, one carbon atom, and one nitrogen atom, [OCN], in that order. (hmdb.ca)
  • The cyanate ion possesses 1 unit of negative charge, borne mainly by the nitrogen atom. (hmdb.ca)
  • Aryl cyanates such are phenyl cyanate, C6H5OCN, can be formed by a reaction of phenol with cyanogen chloride, ClCN, in the presence of a base. (wikipedia.org)
  • 4. The method for making shape memory polymer of claim 3 wherein said monofunctional cyanate ester monomer is selected from the group consisting of 4-methoxyphenyl cyanate ester, 4-nonylphenyl cyanate, 4-phenylphenyl cyanate, 4-cumylphenol cyanate ester, and phenyl cyanate. (patentsencyclopedia.com)
  • Disclosed is the preparation of novel difunctional cyanate monomers with increased aromatic chain length between the cyanate groups and thermosetting resins resulting from the cyclotrimerization of such monomers. (ip.com)
  • The results of this study suggest that cyanate neurotoxicity, and perhaps cassava-associated neurodegenerative diseases, are mediated in part by disruption of glutathione homeostasis in neural tissue. (oregonstate.edu)
  • Organic cyanates are called isocyanates when there is a C−NCO bond and cyanates when there is a C−OCN bond. (marbk-65d.win)
  • However, by introducing an aryl ether bond, para or meta, to the cyanate group, wide highly desirable processing windows were demonstrated. (vt.edu)
  • While cyclopentadienone monomers are sometimes challenging to synthesize there is a wide variety of commercial cyanate ester monomers and prepolymers allowing for a high degree of tunability of the resulting resin without changing the cyclopentadienone unit. (rsc.org)
  • The second portion of the thesis focused on cyanate ester or polycyanurate networks generated from dicyanate monomers. (vt.edu)
  • click here} D. Britton, J. D. Dunitz: The crystal structure of silver cyanate, Acta Crystallogr. (wikipedia.org)
  • Silver cyanate is the cyanate salt of silver. (wikipedia.org)
  • Silver cyanate is a beige to gray powder. (wikipedia.org)
  • AgNCO + 2 HNO 3 + H 2 O → AgNO 3 + CO 2 ↑ + NH 4 NO 3 {\displaystyle {\ce {{AgNCO}+{2HNO3}+H2O\rightarrow {AgNO3}+CO2{\uparrow }+NH4NO3}}} Silver fulminate Willy Kühne (1868), Lehrbuch der physiologischen Chemie (in German) D. Britton, J. D. Dunitz: The crystal structure of silver cyanate, Acta Crystallogr. (wikipedia.org)
  • The resulting compound is heated and reacted with a difunctional cyanate ester resin and cured. (patentsencyclopedia.com)
  • On second thought I was probably wrong and the calcium cyanate/ cyanurate is decently soluble considering the properties of similar salts. (sciencemadness.org)
  • Cyanate may also derive from thiocyanate metabolism (15), because myeloperoxidase catalyzes thiocyanate oxidation in the presence of hydrogen peroxide and then promotes protein carbamylation at inflammation sites (16, 17). (thefreedictionary.com)
  • To remove contaminants such as sodium carbonate, the crude sodium cyanate was dissolved in 50% hot acetic acid. (sciencemadness.org)
  • The acetic acid addition was my own idea, since I thought it would dissolve all the contaminants mentioned in the patent without affecting the cyanate/ cyanurate. (sciencemadness.org)
  • It is an isomer of the much less stable fulminate anion [C−≡N+O]−. A cyanate ester is an organic compound containing the cyanate group. (wikipedia.org)
  • Space-filling model of the cyanate anion. (marbk-65d.win)
  • The resulting solution was then mixed with aqueous calcium chloride, expected was the calcium cyanate product. (sciencemadness.org)
  • Sodium-cyanate, a herbicide belonging to the group Inorganic is used for controlling weeds. (wordpress.com)
  • kan mutant was found to be much less sensitive to cyanate than the delta cynT mutant at a low pCO2, indicating that bicarbonate depletion due to the reaction of bicarbonate with cyanate catalyzed by cyanase is more deleterious to growth than direct inhibition by cyanate. (asm.org)
  • Selective inhibition with sodium cyanate of protein synthesis in colon cancer cells. (thefreedictionary.com)
  • The disruption of GSH homeotasis, as evidenced by reduced tissue GSH/GSSG ratios, likely results from cyanate-induced inhibition of glutathione reductase activity. (oregonstate.edu)
  • Fluorescence iso thio cyanate (FITC), procured from M/s Sigma, USA, was used, and Fluorescence Microscope model BH2 RFL1 PM 10 ADS, (OLYMPUS, Japan) was used to view the detection of virus as fluorescence. (thefreedictionary.com)
  • In nucleophilic substitution reactions cyanate usually forms an isocyanate. (wikipedia.org)
  • The cyanate ion is an ambident nucleophile in nucleophilic substitution because it can react to form an alkyl cyanate R-OCN (exception) or an alkyl isocyanate R-NCO (rule). (hmdb.ca)
  • AgNO 3 + KNCO → Ag ( NCO ) + K + + NO 3 − {\displaystyle {\ce {{AgNO3}+{KNCO}\rightarrow {Ag(NCO)}+{K+}+{NO3^{-}}}}} Alternatively, the reaction AgNO 3 + H 2 N − C ( O ) − NH 2 → AgNCO + NH 4 NO 3 {\displaystyle {\ce {{AgNO3}+{H2N-C(O)-NH2}\rightarrow {AgNCO}+{NH4NO3}}}} analogous to the reaction used for the industrial production of sodium cyanate, may be used. (wikipedia.org)
  • Different to fully phenylene-based systems which are difficult to analyze by 13 C NMR spectroscopy, the reaction with cyanate results in pyridine and cyanurate structures that can be well identified thus improving the structural characterization of such oligomers. (rsc.org)
  • Consequently, it can be clearly seen that the consumption rate of both cyanate groups and EP groups in existence of PESC is faster than that of the neat CE/EP blend, which indicates that the presence of PES-C could accelerate both trimerization reactions of cyanate groups and copolymerization between cyanate groups and EP groups. (thefreedictionary.com)
  • A physiological role for cyanate-induced carbonic anhydrase in Escherichia coli. (asm.org)
  • Cyanate induces expression of the cyn operon in Escherichia coli. (asm.org)
  • Even though most of the information known about the function(s) of carbonic anhydrase primarily relates to its role in cyanobacterial CO(2) fixation, the prokaryotic enzyme has also been shown to function in cyanate degradation and the survival of intracellular pathogens within their host. (nih.gov)
  • Cyanate can be decomposed by the enzyme cyanate lyase (or cyanase), which is found in bacteria and plants. (hmdb.ca)
  • The cyanate ion is relatively non-toxic in comparison with cyanides. (hmdb.ca)
  • The protective effect of melatonin has been documented also against other toxic substances that elicit increased oxidative potential, such as ammonia (Lena & Subramanian, 2003), cyanate (Melchiori et al. (thefreedictionary.com)
  • In N-bonded cyanate complexes the M−NCO unit sometimes has a linear structure, but with O-bonded cyanate the M−O−C unit is bent. (wikipedia.org)
  • Marketresearchdata.net has added a new report on Sodium-cyanate: Global Product Intelligence (2015-2020). (wordpress.com)
  • The report predicts the market size of Sodium-cyanate: Global Product Intelligence (2015-2020) is expected to reach XX billion by 2020. (wordpress.com)
  • The report covers the analysis of global as well as regional markets of Sodium-cyanate: Global Product Intelligence (2015-2020). (wordpress.com)
  • The report " Sodium-cyanate: Global Product Intelligence (2011-2020) " provides market intelligence on the different segments of the agrochemical, based on type of formulation, crop type, pest, and geography. (wordpress.com)
  • It was demonstrated that electron withdrawing characteristics, such as carbonyl, sulfone, or phenylphosphine oxide increased the reactivity of the cyanate group above the melting point of the monomer. (vt.edu)
  • 3. The method for making shape memory polymer of claim 2 wherein said monofunctional cyanate ester monomer has only one cyanate ester moiety per molecule. (patentsencyclopedia.com)
  • Sodium cyanate, a neurotoxic chemical in rodents, primates and humans, is implicated in neurodegenerative disorders in protein-deficient populations subsisting in parts of Africa on the cyanogenic plant cassava. (oregonstate.edu)
  • The three atoms in a cyanate ion lie on a straight line, giving the ion a linear structure. (wikipedia.org)
  • The cyanate ion can bridge between two metal atoms by using both its donor atoms. (wikipedia.org)
  • Supplementation of cyanate in rats caused a significant decrease in serum GSH and increase in calcium and phosphate level both in serum and lens. (bvsalud.org)
  • Since cyanate-treated erythrocytes have increased oxygen affinity, we studied the effect of chronic cyanate administration on tissue oxygen delivery in rats. (annals.org)
  • Sodium cyanate (CNO) was administered for 8 weeks to two groups of rats. (annals.org)
  • The molecular and cellular mechanisms of cyanate neurotoxicity are not understood. (oregonstate.edu)
  • Isocyanic acid , HNCO, is produced when a cyanate salt is acidified. (marbk-65d.win)