329 research outputs found

    Triflumizole

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    In the title compound {systematic name: 4-chloro-N-[1-(1H-imidazol-1-yl)-2-propoxyethyl­idene]-2-(trifluoro­meth­yl)aniline}, C15H15ClF3N3O, the dihedral angle between the aniline and imidazole ring planes is 81.80 (4)°. In the crystal structure, weak inter­molecular C—H⋯X (X = N, O or F) hydrogen bonds and C—H⋯π inter­actions help to consolidate the packing

    Reversible photoluminescence switch: A stair-step Cu4I4 coordination polymer based on a dithioether ligand

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    AbstractA two-dimensional network stair-step Cu4I4 coordination polymer (1) based on 1,4-bis((methylthio)propanoyl)piperazine was prepared. No emission was observed from 1 (off state), while a heated sample (2) of 1 emitted a strong green light (on state). Conversion between 1 and 2 was reversible upon removal of acetonitrile or exposure of 2 to acetonitrile

    A Case of Esophageal Squamous Papillomatosis

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    EFFECTS OF THREE PREPARATORY MOVEMENTS ON SIDEWARD PROPULSIVE MOVEMENT

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    This study investigated the effects of three preparatory movements (squat, countermovement and hopping) on the sideward propulsive movement. Seven subjects were analyzed in 3-D to determine how fast they reacted to external signals, using three techniques, to reacl1 an aIming spot. The hopping and the countermovement types were considered better than the squat type in the propulsion. The hopping particularly showed the shortest duration from the external signal to take-off and also recorded high extension moments due to the pre-stretch mechanism for the push-off phase

    Phyllo-poly[[μ2-1,4-bis­(cyclo­hexyl­sulfanylmeth­yl)benzene-κ2 S:S′](μ2-nitrato-κ2 O:O′)silver(I)]

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    The title compound, [Ag(NO3)(C20H30S2)]n, was synthesized by the reaction of silver nitrate and 1,4-bis­(cyclo­hexyl­thio­meth­yl)benzene (bctmb) in acetonitrile. The coordination polymer exhibits a two-dimensional layer structure. The layers are wave-like and parallel to the crystallographic ac plane; AgI ions are linked by the bctmb ligands and nitrate anions along the crystallographic a and c directions, respectively. In addition, the crystal structure is stabilized by C—H⋯O hydrogen bonds

    Pirimicarb: 2-dimethylamino-5,6-dimethylpyrimidin-4-yl dimethyl­carbamate

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    In the title compound, C11H18N4O2 (systematic name: 2-dimethyl­amino-5,6-dimethyl­pyrimidin-4-yl N,N-dimethyl­carb­amate), the pyrimidine ring and dimethyl­amino group are almost in the same plane, making a dihedral angle of 1.6 (1)°. The dihedral angle between the mean plane of the pyrimidine ring and that of the dimethyl­carbamate group is 83.42 (5)°. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds contribute to the stabilization of the packing

    Methidathion: S-(5-meth­oxy-2-oxo-2,3-dihydro-1,3,4-thia­diazol-3-yl)methyl O,O-dimethyl phospho­rodithio­ate

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    The title compound, C6H11N2O4PS3, crystallizes with two independent mol­ecules in the asymmetric unit. The dihedral angles between the thia­diazole ring planes and the PS2 planes of the phospho­rodithio­ate group are 86.51 (5) and 56.33 (5)° in the two mol­ecules. In the crystal, weak inter­molecular S⋯S [3.570 (8) Å] inter­actions and C—H⋯O and C—H⋯N hydrogen bonds contribute to the stabilization of the packing

    Optic Disc Pit with Peripapillary Retinoschisis Presenting as a Localized Retinal Nerve Fiber Layer Defect

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    A 59-year-old woman was referred to our clinic for a glaucoma evaluation. The visual acuity and intraocular pressure were normal in both eyes. However, red-free fundus photography in the left eye showed a superotemporal wedge-shaped retinal nerve fiber layer defect, and visual field testing showed a corresponding partial arcuate scotoma. In an optical coherence tomography examination, the macula was flat, but an arcuate-shaped peripapillary retinoschisis was found. Further, the retinoschisis seemed to be connected with a superotemporal optic pit shown in a disc photograph. After 3 months of a topical prostaglandin analogue medication, the intraocular pressure in the retinoschisis eye was lowered from 14 to 10 mmHg and the peripapillary retinoschisis was almost resolved. We report a rare case of an optic disc pit with peripapillary retinoschisis presenting as a localized retinal nerve fiber layer defect

    A Case of Optic Nerve Atrophy with Severe Disc Cupping after Methanol Poisoning

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    We report a rare case of optic nerve atrophy with severe disc cupping resulting from methanol poisoning. A 30-year-old man presented to the hospital complaining of decreased visual acuity in both eyes a day after drinking alcohol containing methanol. His initial visual acuity allowed for only visualizing hand motion and not corrected in either eye. Initial intraocular pressure was within normal limits in both eyes. Initial fundus examination showed optic disc swelling in both eyes. Four years later, he visited our hospital for an eye evaluation. Visual acuity in both eyes still only allowed for visualizing hand motion. No nystagmus was observed in either eye during the optokinetic nystagmus test, and no waves were found in a visual evoked potential test. No specific change was noted on brain magnetic resonance imaging. On fundus examination, there was disc pallor in both eyes and disc cupping with a high cup/disc (C/D) ratio above 0.9 in the left eye. C/D ratio of the right eye was 0.5. Methanol poisoning may induce glaucomatous disc cupping in the late stage as well as optic atrophy. One possible mechanism of disc cupping is ganglion cell loss due to acute demyelination of the retrobulbar optic nerve. This report is the first photographic evidence of methanol induced optic disc cupping in Korea
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