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Topic: Methine

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HMS Sluys

	Photographic compositions and elements spectrally sensitized with new methine dyes - Patent 4283488
		As used herein, the term "methine dye" means a dye comprising two nuclei, at least one of which is a heterocycle containing at least one nitrogen atom, the two nuclei being joined by a methine linkage, which is a conjugated chain of carbon atoms.
		Methine dyes are generally known, as is the use of such dyes as spectral sensitizers in silver halide photographic compositions.
		Methine dyes of the present invention are similar in structure to known methine dyes, except that they have a trialkylsilylalkyl group attached to a nitrogen atom in a heterocyclic ring or ring system of one or both of the nuclei of the dye.
	www.freepatentsonline.com /4283488.html (4708 words)

	Methine dyes - Patent 4102688
		The methine dye of claim 1, wherein said dye has the general formula (B), and said nucleus formed by Z is a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, an oxazole nucleus, a benzoxazole nucleus or a naphthoxazole nucleus.
		The methine dye of claim 4, wherein R.sub.2 represents a hydrogen atom, an alkyl group, an aralkyl group or an aryl group.
		The methine dye of claim 6, wherein m is 2.
	www.freepatentsonline.com /4102688.html (7325 words)

	Journal of Essential Oil Research: JEOR: Composition of the Essential Oil of Helichrysum forsskahlii (Gmel) Hilliard et ...
		Furthermore, the methine proton at δ 2.50 (H-4) is coupled with the methyl protons at δ 1.16 (H-14) and with the methylene protons at δ 1.54 (H-3), which are coupled to the methylene protons at δ 1.82 and 1.45 (H-2).
		HMBC correlations were observed between the methine proton at δ 2.50 (H-4) with the quaternary carbons at δ 35.0 (C-IO) and 148.3 (C-5), the methine carbon at δ 123.6 (C-6), the methyl carbon at δ 23.0 (C-14) and the methylene carbon at δ 34.1 (C-3).
		The methine proton at δ 5.22 (H-6) was correlated with the methine carbons at δ 38.8 (C-4) and 42.1 (C-7) and the methylene carbon at δ 22.9 (C-8).
	www.findarticles.com /p/articles/mi_qa4091/is_200501/ai_n9474334/pg_2 (894 words)

	Methine dye and silver halide photographic material containing the same - Patent 6750003 (Site not responding. Last check: 2007-10-18)
		Methine compounds have hitherto been used as a spectral sensitizing dye of silver halide photographic materials.
		The methine group may be taken together with other methine group to form a ring, or may be taken together with an auxochrome to form a ring.
		Preferably, the methine group is an unsubstituted, ethyl group-substituted, or methyl group-substituted methine group.
	www.freepatentsonline.com /6750003.html (11913 words)

	Encyclopedia: Heme
		Heterocyclic compounds are substances which contain a ring structure as found in benzene and the aromatic compounds, or aromatic hydrocarbons, but in which other atoms than carbon, such as sulfur, oxygen or nitrogen are found as part of the ring.
		Category: Biochemistry In organic chemistry, a chlorin is a large heterocyclic aromatic ring consisting, at the core, of 3 pyrroles and one reduced pyrrole coupled through 4 methine linkages.
		A corrin is a polyaromatic ring related to the porphyrin ring in hemoglobin, consisting of 4 pyrrole subunits, joined on opposite sides by a C-CH3 methylene link, on one side by a C-H methylene link, and with the two of the pyrroles joined directly.
	www.nationmaster.com /encyclopedia/Heme (1568 words)

	3O14D - Answers for Problem Sheet 8 (Site not responding. Last check: 2007-10-18)
		Using NOE experiments, you would irradiate each of the signals in the spectrum (one by one) and observe the remaining resonances to assess whether there was an observable enhancement.
		Irradiation of the methine proton would provide an enhancement of the doublet CH In the trans isomer, irradiation of the singlet CH group would be expected to provide an enhancement of the methine proton.
		Irradiation of the methine proton would provide an enhancement of the doublet CH as well enhancing the singlet CH group.
	assign2.chem.usyd.edu.au /thirdyear/organic/field/nmr/ans08.htm (753 words)

	Dye compound and photographic element containing same - Patent 5288738 (Site not responding. Last check: 2007-10-18)
		The absorption of red light requires that the sensitizing dye contain an extended chromophore such as that of a dicarbocyanine structure, which is characterized by a link of three methine groups.
		Examples of substituents for methine groups include alkyl (e.g., of from 1 to 6 carbon atoms), aryl (e.g., phenyl), aralkyl (e.g., benzyl), alkoxy (e.g., methoxy, ethoxy).
		In a preferred embodiment, the methine groups are unsubstituted.
	www.freepatentsonline.com /5288738.html (3001 words)

	Professor Les Field: NMR Spectroscopy in Organic Chemistry and Advanced NMR Spectroscopy (Site not responding. Last check: 2007-10-18)
		H NMR spectrum of this molecule, the methine hydrogen occurs at
		1.2 ppm, estimate the position of the methine proton in (1).
		In the complex 3-dimensional structure of a protein, groups are held in relatively fixed positions by hydrogen bonding.
	assign2.chem.usyd.edu.au /thirdyear/organic/field/nmr/prb02.htm (179 words)

	Pharmacokinetic evaluation of conventional and controlled-release product of naproxen. Quantitative determination of ...
		Quantitative determination of dextran-naproxen ester pro-drugs with varying molecular weights and degrees of substitution in biological media by means of high-performance size exclusion chromatography with fluorescence detection.
		Metabolic chiral inversion of anti-inflammatory 2-arylpropionates: lack of reaction in liver homogenates, and study of methine proton acidity.
		Using 2-dimethylaminoethanethiol 2-phenylpropionate (DEPP) as a model acyl thioester, the acidity of the methine proton was investigated by monitoring the proton/deuterium exchange occurring in deuterated solvents using high-resolution n.m.r.
	www.hairmillion.com /rx-online-info/naproxen-online-rx/naproxen-online-rx.24.html (591 words)

	GaussView Windows
		The calculated shielding anisotropy for the methine proton is 23.9 ppm while the calculated isotropic chemical shift is -4.4 ppm relative to TMS, in good agreement with the experimental value of -4.0 ppm.
		The current density is induced by an external magnetic filed parallel to the C3 axis and leads to a -3 ppm deshielding contribution to the phenyl proton from the bonded carbon and the two neighboring carbons.
		The phenyl proton shielding is in sharp contrast to that for the methine proton (left the phenyl ring, along the C3 axis), where the shielding contribution from its own atom is the same as that for the phenyl proton.
	www.compuchem.com /gaussvw.htm (1587 words)

	Alliance for the Polyurethanes Industry - Building Codes & Standards: Polyurethane Raw Materials Test Methods
		H NMR method is based on the chemical shift differences between the methyl group of propylene oxide (PO) and the backbone methylene and methine groups from EO and PO, respectively.
		The peak at 78 ppm is the methine carbon of the glycerin initiator.
		The two intense groups of peaks are due to the methylene and methine carbons of PO.
	www.polyurethane.org /standards/purmac_docs/article5.asp (2723 words)

	Process NMR Associates LLC - Process and Analytical NMR Services and Consulting 1H-13C NMR Derived Average Molecule ...
		Methine Carbon - Atomic percent of aliphatic (naphthenic or paraffinic) methine carbons.
		Methylene/Methine-Substituted Aromatic Carbon - Atomic percent carbon present as aromatic carbon substituted by an alkyl group through a methine or methylene carbon.
		Average Number of Napthenic Substitutions per Cluster - Average number of aromatic carbons substituted by a naphthenic carbon (methine or methylene).
	www.process-nmr.com /Table%204%2013C%20Average%20Molecule%20Param.htm (748 words)

	UofS Chemistry - NMR Booking Schedules (Site not responding. Last check: 2007-10-18)
		The J modulation experiment, also known as APT or Attached Proton Test, is easily understood using the vector model.
		Let's consider what happens in turn to each of the four different types of carbon signals (quaternary, methine, methylene, methyl) beginning with quaternary.
		The quaternaries and methylenes are generally phased negatively and the methines and methyls phased positively.
	chem4823.usask.ca /jmod.html (331 words)

	Springer WienNewYork - Applied Magnetic Resonance
		We have studied the hydration dependence of the internal protein of hen egg white lysozyme by naturally abundant
		(only for carbon experiments) were measured in the temperature range from 0 to 50°C. The spectral resolution in carbon cross-polarization magic angle spinning spectrum allows to treat methine, methylene and methyl carbons separately, while proton experiments provide only one integral signal from all protons at a time.
		The relaxation times were quantitatively analyzed by the well-established correlation function formalism and model-free approach.
	www.springer.at /periodicals/article_latest_issue.jsp?articleID=xxxxxxxxxx80xxxxxx375109&volumeIssueID=xxxxxxxxxx61xxxxxx375108&periodicalID=0937-9347&supplement=null (355 words)

	Tetrapyrroles and related compounds (Site not responding. Last check: 2007-10-18)
		Derivatives of the corrin nucleus, which contains four reduced or partly reduced pyrrole rings joined in a macrocycle by three =CH- groups and one direct carbon-carbon bond linking alpha positions.
		Complexes consisting of an iron ion coordinated to a porphyrin acting as a tetradentate ligand, and to one or two axial ligands.
		-positions by four methine groups to form a macrocyclic structure (porphyrin is designated porphine in Chemical Abstracts indexes).
	www.chem.qmw.ac.uk /iupac/class/tetpy.html (172 words)

	CHI C - Online Information article about CHI C
		Similarly a CH group may be replaced by a nitrogen atom with the production of compounds of similar stability; thus benzene gives pyridine, naphthalene gives quinoline and isoquinoline; anthracene gives See also:
		Similarly, two or more methine groups may be replaced by the same number of nitrogen atoms with the formation of rings of considerable stability.
		pyrrol, each of which contains four methine or CH groups, and an oxygen, sulphur and imido (NH) member respectively; a series of compounds containing selenium is also known.
	encyclopedia.jrank.org /CHA_CHR/CHI_C.html (5934 words)

	Carbocyclization Reaction of Active Methine Compounds with Unactivated Alkenyl or Alkynyl Groups Mediated by TiCl4-Et3N (Site not responding. Last check: 2007-10-18)
		Carbocyclization Reaction of Active Methine Compounds with Unactivated Alkenyl or Alkynyl Groups Mediated by TiCl4-Et3N
		, iodocarbocyclization reaction of various active methine compounds having alkenyl groups gave iodocycloalkane derivatives in good yields.
		This reaction proceeds with high streoselectivity through a cis-addition of trichlorotitanium enolates of active methine compounds to alkynes, and the resulting vinyltitanium intermediates can be further functionalized by the reaction with various electrophiles.
	pubs.acs.org /cgi-bin/jtext?joceah/63/i25/abs/jo981603k (138 words)

	[No title] (Site not responding. Last check: 2007-10-18)
		Update: Analysis of L-Tryptophan for the Etiology of Eosinophilia-Myalgia Syndrome In August 1990, CDC and the Food and Drug Administration proposed a structure for peak 97 (Figure 1A), the high performance liquid chromatographic (HPLC) peak that was most predictive of L-tryptophan (LT) lots associated with eosinophilia-myalgia syndrome (EMS) cases(1).
		Analyses of the product of LT and acetaldehyde show that the product is the di-L-tryptophan aminal of acetaldehyde (DTAA), with the methine bridge coupling the two tryptophan molecules across the indolenitrogens (Figure 1B) rather than the amino nitrogens (Figure 1A).
		Thissynthesized product has the same proton nuclear magnetic resonance(NMR) spectra, mass spectra, and HPLC chromatographic properties aspeak 97.
	www.textfiles.com /drugs/notptryp.txt (420 words)

	Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations
		Energy Citations Database (ECD) Document #6455498 - Facile deuterium exchange of alkyl and methine protons in octaalkylprophyrins
		Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link.
		Facile deuterium exchange of alkyl and methine protons in octaalkylprophyrins
	www.osti.gov /energycitations/product.biblio.jsp?osti_id=6455498 (129 words)

	US PATENT SUBCLASS 430 / 595-- .~.~.~.~.~ Odd number of carbons in acyclic methine chain (Site not responding. Last check: 2007-10-18)
		US PATENT SUBCLASS 430 / 595--.~.~.~.~.~ Odd number of carbons in acyclic methine chain
		.~.~.~.~.~ Odd number of carbons in acyclic methine chain
		Odd number of carbons in acyclic methine chain:
	www.patentec.com /data/class/defs/430/595.html (80 words)

	US PATENT SUBCLASS 8 / 657-- .~ Basic dye, including diphenylmethane, triphenylmethane, xanthene, ... (Site not responding. Last check: 2007-10-18)
		.~ Basic dye, including diphenylmethane, triphenylmethane, xanthene, fluorene, methine, acridine, oxazine, phenazine, flavylium, naphthoperinone, quinophthalone, etc., group-containing
		Basic dye, including diphenylmethane, triphenylmethane, xanthene, fluorene, methine, acridine, oxazine, phenazine, flavylium, napthoperinone, quinophthalone, etc., group-containing:
		See the Glossary for a definition of basic dye.
	www.patentec.com /data/class/defs/8/657.html (130 words)

	Class Schedule for Class 8 BLEACHING AND DYEING; FLUID TREATMENT AND CHEMICAL MODIFICATION OF TEXTILES AND FIBERS
		Basic dye, including diphenylmethane, triphenylmethane, xanthene, fluorene, methine, acridine, oxazine, phenazine, flavylium, naphthoperinone, quinophthalone, quaternary ammonium group, etc., containing
		Basic dye, including diphenylmethane, triphenylmethane, xanthene, fluorene, methine, acridine, oxazine, phenazine, flavylium, napthoperinone, quinophthalone, quaternary ammonium group, etc., containing
		Vat dye or sulfur dye, e.g., quinonic or indigoid reducible, or sulfur organic compound reaction product dye, etc.
	www.uspto.gov /go/classification/uspc008/sched008.htm (784 words)

	DEPT Experiment (Site not responding. Last check: 2007-10-18)
		The DEPT Experiment creates Distortionless Enhancement by Polarization Transfer.
		This experiment can be used to increase the signal intensities of 13C, or can be used to distinguish quaternary, methine, methylene, and methyl carbons.
		Type dept to set up the DEPT experiment.
	nmr.chem.indiana.edu /NMRguide/1dexpt/dept.html (166 words)

	The NMR Mosaic: Faculty (Site not responding. Last check: 2007-10-18)
		Your students will analyze each peak in the spectrum.
		Based on the integration, multiplicity, and chemical shift, they will construct molecular fragments (by affixing static cling pieces to base methyl, methylene, and methine pieces that make up the molecule).
		An example PowerPoint is available to explain NMR interpretation and show students how to interpret NMR spectra using the NMR Mosaic.
	www.tlu.edu /academics/chemistry/nmr/fac.html (427 words)

	US Patent Class 430-- RADIATION IMAGERY CHEMISTRY: PROCESS, COMPOSITION, OR PRODUCT THEREOF
		.~.~.~ Intercyclic methine or azomethine and cyclic ring containing
		.~.~.~.~.~ Methine linked hetero ring with hetero group bridged or fused thereto
		.~.~.~.~.~ One or both methine linked rings carbocyclic
	www.patentec.com /data/class/430.html (2380 words)

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