Monoclonal Antibody-Based ELISAs for Part-per-Billion Determination of Polycyclic Aromatic Hydrocarbons: Effects of Haptens and Formats on Sensitivity and Specificity
作者:Kai Li、Rongliang Chen、Bitao Zhao、Mei Liu、Alexander E. Karu、Victoria A. Roberts、Qing X. Li
DOI:10.1021/ac980765d
日期:1999.1.1
As a first step toward developing sensitive enzyme-linked immunosorbent assays (ELISAs) for multianalyte detection of polycyclic aromatic hydrocarbons (PAHs), haptens with different lengths of carboxylic acid spacers at various positions were derived from naphthalene, fluorene, anthracene, phenanthrene, pyrene, fluoranthene, chrysene, and benzo[a]pyrene (BaP). These haptens were coupled with bovine serum albumin (BSA) to form competitor conjugates. All of these haptens were recognized to different extents by monoclonal antibodies (MAbs) 4D5 and 10C10 originally derived by Gomes and Santella (Chem. Res. Toxicol. 1990, 3, 307−310). The most sensitive indirect ELISAs were obtained by coating wells with the least competitive conjugates. Direct ELISAs using horseradish peroxidase conjugates of pyrene and BaP were less sensitive. The MAbs bound BaP with spacers at either C1 or C6. The cross-reactivity profiles of the eight PAHs were different with each PAH−BSA conjugate used as coating antigen. The ELISA results for BaP closely correlated with those by gas chromatography (GC), but the detection limit of the ELISA was ∼150-fold more sensitive than that of GC, with 2−600 nM spike recoveries of 80−127% from human urine and canal and tap water.
Photoionization Studies of Chromophore-Labeled Amino Acids and Peptides
作者:Christopher T. Houston、James P. Reilly
DOI:10.1021/jp001246t
日期:2000.11.1
of a naphthol chromophore covalently tethered to a few different aminoacids and small peptides are investigated. To isolate the chromophore from the biological molecules the linkage between them is constructed from saturated alkyl chains of up to 12 carbons in length. Experimental results are compared with those of previous studies that explored the photoionization of macromolecules.
HYPERBRANCHED POLYMERS FOR ORGANIC PIGMENT DISPERSIONS AND WATER-SENSITIVE PIGMENTS
申请人:BASF Coatings GmbH
公开号:US20190106592A1
公开(公告)日:2019-04-11
Aryl-modified hyperbranched polyols are described, as are coating compositions containing these polyols. These polyols enable waterborne coating compositions that: include water-sensitive pigments; are storage stable; and have a low content of VOCs, as well as solventborne coating compositions that: include organic pigments; are storage stable; and enable certain enhanced color properties.
Synthesis of plant-growth regulators. Part III. ω-2-Naphthyloxyalkanecarboxylic acids
作者:P. M. Pope、D. Woodcock
DOI:10.1039/jr9540001721
日期:——
Naphthalene and 2,3-dihydrobenzo[b][1,4]dioxine derivatives with extended side chains as new scaffolds of CB<sub>2</sub>-selective ligands
作者:Noha A. Osman、Amr H. Mahmoud、Christian D. Klein、Marco Allarà、Vincenzo Di Marzo、Khaled M. Abouzid、Ashraf H. Abadi
DOI:10.1039/c4md00232f
日期:——
Herein, we report the synthesis of naphthalene, dihydrobenzodioxine and fluorene derivatives with extended side chains and their biological evaluation as ligands of CB1 and CB2 receptors.