Results 61 to 70 of about 3,669 (219)
Synthesis and structure of 3-(14H-dibenzo[a,j]xanthen-14-yl)phenyl nicotinate
Acta Crystallographica Section E: Crystallographic CommunicationsIn the title compound, C33H21NO3, the dihedral angle between the naphthalene units is 10.85 (4)° and the pyran ring adopts a shallow boat conformation. In the crystal, C—H...N and C—H...O hydrogen bonds link the molecules, enclosing R22(16) ring motifs ...
Ekaterina A. Akishina +6 more
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Investigation of efficient synthesis of 1, 8-dioxo-octahydroxanthene derivatives under solvent-free grinding method [PDF]
, 2013 In these studies, we had observed polyaniline (PANI) supported p-toluene sulfonic acid (TsOH) and FeCl3 (PANI- TsOH, PANI-FeCl3) as excellent reusable solid acid catalysts for the synthesis of 1, 8-dioxo-octahydroxanthene derivatives 4(a-g) under solvent-
P. Dutta, P. Sarma, R. Borah
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E-Journal of Chemistry, 2011 A simple and efficient method have been described for the synthesis of 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one derivatives employing a one-pot, three-component reaction of aryl aldehydes, 2-naphthol and dimedone in the presence of ...
Zahed Karimi Jaber +3 more
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Kinetic models for the electrochemical decolouration of two reactive azo dyes [PDF]
, 2018 In this work, the indirect oxidation of two azo dyes (Colour Index Reactive Orange 4 and 13) was performed in an electrochemical batch cell in the presence of chloride as an electrolyte.
Buscio Olivera, Valentina +3 more
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Research Progress of Near-Infrared Fluorescence Immunoassay
Micromachines, 2019 Near-infrared fluorescence probes (NIFPs) have been widely used in immunoassay, bio-imaging and medical diagnosis. We review the basic principles of near-infrared fluorescence and near-infrared detection technology, and summarize structures, properties ...
Xiao-Hui Chang +8 more
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Pentoxifylline: A New Armamentarium in Diabetic Foot Ulcers [PDF]
Journal of Clinical and Diagnostic Research, 2014 Background: Diabetic foot ulcers are estimated to affect 15% of all diabetics and precede almost 85% of foot amputations. Pentoxyfylline a substituted xanthenes’ derivative has been reported to increase the blood flow to the microcirculation and ...
Venkatesh Rewale +2 more
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E-Journal of Chemistry, 2012 Saccharin sulfonic acid (SaSA) is utilized as a highly efficient, green and inexpensive sulfonic acid-containing catalyst for the following one-pot multi-component organic transformations: (i) the condensation of dimedone (2 eq.) with aromatic aldehydes (
Abdolkarim Zare +3 more
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Artichoke (Cynara scolymus L.) pests in the Mediterranean
Glasnik Zaštite Bilja, 2023 Artichoke is a perennial that thanks to its nutritional and health characteristic are becoming an incrisingliy widespread crop in coastal Croatia and the islands.
Kristijan Franin +2 more
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A Study of the Spectral Properties of Rhodamine (6G&B) DyesMixture Dissolved in Chloroform [PDF]
Engineering and Technology Journal, 2012 The spectral properties (absorption and fluorescence) of laser dyes (R6G& R B)mixture have been studied; this type of laser dye belongs to the Xanthenes family,and has been dissolved in chloroform to prepare (1*10-5, 2*10-5, 5*10-5, 7*10-5, 1*10-4M) at ...
Slafa I. Ibrahim
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Summer Ephemeroptera, Plecoptera and Trichoptera of Southwestern of 15 Drainages in Great Smoky Mountains National Park [PDF]
, 2004 INHS Technical Report prepared for unspecified ...
DeWalt, R. Edward
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