Search results for "Methylene"
showing 10 items of 821 documents
CCDC 1014200: Experimental Crystal Structure Determination
2014
Related Article: Hai Yi, Markus Albrecht, Arto Valkonen, Kari Rissanen|2015|New J.Chem.|39|746|doi:10.1039/C4NJ01654H
CCDC 816417: Experimental Crystal Structure Determination
2017
Related Article: Dieter Schollmeyer, Heiner Detert|2017|Tetrahedron Lett.|58|843|doi:10.1016/j.tetlet.2017.01.040
CCDC 684679: Experimental Crystal Structure Determination
2009
Related Article: H.Detert, D.Lenoir, H.Zipse|2009|Eur.J.Org.Chem.|2009|1181|doi:10.1002/ejoc.200801076
Short X···N Halogen Bonds With Hexamethylenetetraamine as the Acceptor
2021
Hexamethylenetetramine (HMTA) and N-haloimides form two types of short (imide)X···N and X–X···N (X = Br, I) halogen bonds. Nucleophilic substitution or ligand-exchange reaction on the peripheral X of X–X···N with the chloride of N-chlorosuccinimide lead to Cl–X···N halogen-bonded complexes. The 1:1 complexation of HMTA and ICl manifests the shortest I···N halogen bond [2.272(5) Å] yet reported for an HMTA acceptor. Two halogen-bonded organic frameworks are prepared using 1:4 molar ratio of HMTA and N-bromosuccinimide, each with a distinct channel shape, one possessing oval and the other square grid. The variations in channel shapes are due to tridentate and tetradentate (imide)Br···N coordi…
Colorimetric quantitation of trace amounts of sodium lauryl sulfate in the presence of nucleic acids and proteins
1992
A fast and sensitive procedure for the colorimetric detection of sodium lauryl sulfate (SDS) is presented. The assay is based upon the formation of a chloroform-extractable ion pair between lauryl sulfate and methylene blue that is quantified spectrophotometrically with an estimated detection limit of 150 ng of SDS. The method is suitable for the monitoring of contaminating traces of SDS in protein or nucleic acid samples that have the potential to interfere with enzymatic manipulations such as proteolytic digest, restriction analysis, or reverse transcription. Since the procedure is extremely simple and no special equipment is required it is accessible to every researcher concerned with SD…
CCDC 741667: Experimental Crystal Structure Determination
2009
Related Article: J.Zhao, V.Bohmer, M.Bolte|2009|Acta Crystallogr.,Sect.E:Struct.Rep.Online|65|o1658|doi:10.1107/S1600536809023344
CCDC 1554869: Experimental Crystal Structure Determination
2019
Related Article: Wenqian Shan, Valentin Quesneau, Nicolas Desbois, Virginie Blondeau-Patissier, Mario L. Naitana, Yoann Rousselin, Claude P. Gros, Zhongping Ou, Karl M. Kadish|2019|J.Porphyrins Phthalocyanines|23|213|doi:10.1142/S1088424619500214
CCDC 658271: Experimental Crystal Structure Determination
2008
Related Article: K.Salorinne, M.Nissinen|2008|Tetrahedron|64|1798|doi:10.1016/j.tet.2007.11.103
CCDC 1414524: Experimental Crystal Structure Determination
2016
Related Article: Vanessa Soto-Cerrato, Pilar Manuel-Manresa, Elsa Hernando, Silvia Calabuig-Fariñas, Alicia Martínez-Romero, Víctor Fernández-Dueñas, Kristoffer Sahlholm, Thomas Knöpfel, María García-Valverde, Ananda M. Rodilla, Eloisa Jantus-Lewintre, Rosa Farràs, Francisco Ciruela, Ricardo Pérez-Tomás, and Roberto Quesada|2015|J.Am.Chem.Soc.|137|15892|doi:10.1021/jacs.5b09970
Chiral Serum Pharmacokinetics of 4-Fluoroamphetamine after Controlled Oral Administration
2021
Abstract Over the last two decades, misuse of 4-fluoroamphetamine (4-FA) became an emerging issue in many European countries. Stimulating effects last for 4–6 hours and can impact psychomotor performance. The metabolism of amphetamine-type stimulants is stereoselective and quantification of (R)- and (S)-enantiomers has been suggested for assessing time of use. To date, no data on enantioselective pharmacokinetics is available for 4-FA in serum samples. An enantioselective liquid chromatography−tandem mass spectrometry (LC–MS-MS) method was developed using a chiral Phenomenex® Lux 3 μm AMP column. Validation of the method showed satisfactory selectivity, sensitivity, linearity (0.5–250 ng/mL…