clathrates of urea and thiourea springerlink

  • clathrates of urea and thiourea springerlink

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US6051730A - Surfactant clathrates and agricultural chemical clathrates of urea and thiourea springerlink

US6051730A US08/850,455 US85045597A US6051730A US 6051730 A US6051730 A US 6051730A US 85045597 A US85045597 A US 85045597A US 6051730 A US6051730 A US 6051730A Authority US Unite Trapping of oil molecules in clathrates: Oil trapping clathrates of urea and thiourea springerlink The salts viz.; sodium chloride, urea, thiourea and hydroquinone were used in different concentrations and combination to enhance the clathrates formation for maximum oil trapping. The effect of various parameters like pH, contact time, rpm, salts concentration and nature of the soil samples were studied. Trapping of oil molecules in clathrates: Oil trapping clathrates of urea and thiourea springerlink In the present study, oil spiked soil samples were cleaned up using clathrates, by proposing an innovative mechanism, formed by different combinations of salts like sodium chloride, urea, thiourea and hydroquinone. The clathrates formed act as trap for the oil molecules present in the contaminated soil.

Surfactant co-clathrates - Rhodia Inc.

A "non-clathratable" chemical is one which is difficult to clathrate, i.e. the chemical does not form a clathrate with urea or forms clathrates with urea only at low percentages of the chemical, when subjected to a standard clathration process, e.g. organosilicone surfactants wherein the organic group has less than about 12 oxyethylene units clathrates of urea and thiourea springerlink Surfactant clathrates and agricultural chemical formulations clathrates of urea and thiourea springerlink Urea and Thiourea Complex of High Molecular Weight Poly(Ethylene Oxide)", Journal of Polymer Science, vol. 49, pp. 397-406 (1961). clathrates of urea and thiourea springerlink Clathrates, also referred to as clathrates of urea and thiourea springerlink Related searches clathrates of urea and thiourea springerlink

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Notes - Urea Complexes of Some Higher Methylalkanes | The clathrates of urea and thiourea springerlink

A solid-state NMR study of the 2,15-dimethylhexadecane/urea inclusion compound. Journal of Molecular Structure 2007, 837 clathrates of urea and thiourea springerlink Clathrates of urea and thiourea. Inclusion polymerization of isoprene in deoxycholic acid clathrates of urea and thiourea springerlink Urea and thiourea were high-purity grades from Carlo Erba and Riedel de Haen, respectively. Standard trans-1,4-polyisoprene was obtained from Aldrich. Irradiation was made in a gamma cell from Atomic Energy of Canada equipped with a 60 Co radiation source at a dose rate of 2.0 kGy/h. High-Pressure Sorption of Hydrogen in Urea | The Journal of clathrates of urea and thiourea springerlink Hydrogen sorption in urea C(NH2)2O has been probed by direct measurements in Sieverts apparatus at 7.23 and 11.12 MPa as well as by Raman spectroscopy for the sample compressed and heated in a high-pressure gas-loaded diamond-anvil cell up to 14 GPa. Both these methods consistently indicate the occurrence of small nonstoichiometric sorption of hydrogen in urea phase I. The compression of clathrates of urea and thiourea springerlink

Evidence of photo- and thermal-induced reversible clathrates of urea and thiourea springerlink

@article{osti_6296280, title = {Evidence of photo- and thermal-induced reversible intermolecular hydrogen-atom transfer in. gamma. -irradiated thiourea clathrates as studied by electron spin resonance}, author = {Ichikawa, T}, abstractNote = {There has been a report (M. Iwasaki and Toriyama) on an electron spin resonance study of reversible intramolecular radical conversion due to photo- and clathrates of urea and thiourea springerlink Clathrate and inclusion compounds : part 13. Vibrational and clathrates of urea and thiourea springerlink IR spectroscopy - Raman spectroscopy - 13C MAS NMR spectroscopy - clathrates - inclusion compounds - carboxylic acids - urea - thiourea View graph of relations Vibrational and NMR spectroscopic studies of carboxylic acid guests in urea. Clathrate and Inclusion Compounds. Part 13 [1]. Vibrational clathrates of urea and thiourea springerlink Thiourea does not forminclusion compounds with any of the C1 to C10acids. The vibrational and NMR data support theconclusion that the acids are present ashydrogen bonded dimers in the channels of thehost.

Application of urea complexes in the purification of fatty clathrates of urea and thiourea springerlink

Application of urea complexes in the purification of fatty acids, esters, and alcohols. clathrates of urea and thiourea springerlink Clathrates of urea and thiourea, Journal of Structural Chemistry, 10.1007 clathrates of urea and thiourea springerlink Adhesion of gold and silver nanoparticles onto urea clathrates of urea and thiourea springerlink We report the synthesis and characterization of a new series of urea inclusion compounds containing primary alkylamine (octyl, decyl and dodecyl) as guests, as well as the deposition of gold and silver nanoparticles onto the crystalline surface of these complexes. X-ray diffraction confirms the inclusion process of the amine in the urea cavities. The structures determined for the three clathrates of urea and thiourea springerlink A Raman spectroscopic investigation of the conformation of clathrates of urea and thiourea springerlink The Raman spectra of the cyclohexyl halidethiourea clathrates have been investigated. It is found that whereas cyclohexyl chloride and bromide exist only in the axial conformation in the clathrate, cyclohexyl iodide exists in both the axial and equatorial conformations in the clathrate.

WO1999056543A1 - Surfactant clathrates and agricultural clathrates of urea and thiourea springerlink

A solid, water-soluble complex comprising: a) a water-miscible polysiloxane of formula (I), wherein n is from to 2 to 6; a is from 8 to 25; and b is from 0 to 25; and the oxyalkylene groups may be random or block mixtures; y is from 0 to 5; x is from 1 to 5; and R is selected from the group consisting of hydrogen, C1-C4 alkyl, and a C1-C4 alkyl ester; or (II) wherein A is a linear or branched clathrates of urea and thiourea springerlink Urea | NH2CONH2 - PubChem Urea is a nitrogenous compound containing a carbonyl group attached to two amine groups with osmotic diuretic activity. In vivo, urea is formed in the liver via the urea cycle from ammonia and is the final end product of protein metabolism. Urea extraction crystallization - chemical processes .. I Urea-paraffin-adduct can be filtered and thereby separated from the isoparaffins and other non-paraffinic components. By washing with solvent, the resulting solid precipitate of the adduct is. Washing the clathrates with hot water of about 75 With splits of clathrates and free of waxes. The obtained N-paraffins purity of about 99%.

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