Results 1 to 10 of about 29,714,115 (240)

Quantitative analysis of naphthalene, 1-naphthol and 2-naphthol at nanomol levels in geothermal fluids using SPE with HPLC [PDF]

open access: yesMethodsX, 2023
Naphthalene (NAP), 1-naphthol (1-NAP) and 2-naphthol (2-NAP) are the thermal decomposition products of naphthalene sulfonates making them potentially new geothermal reservoir permeability tracers, however, to date, no sensitive and fast detection method ...
Lucjan Sajkowski   +2 more
doaj   +3 more sources

Structural and Energetic Insights on Two Dye Compounds: 1-Acetyl-2-Naphthol and 2-Acetyl-1-Naphthol [PDF]

open access: yesMolecules, 2020
The energy involved in the structural switching of acyl and hydroxyl substituents in the title compounds was evaluated combining experimental and computational studies.
Vera L. S. Freitas   +1 more
doaj   +3 more sources

5-Amino-1-naphthol [PDF]

open access: yesActa Crystallographica Section E, 2009
In the title compound, C10H9NO, the amino and the hydroxy groups act both as a single donor and a single acceptor in hydrogen bonding. In the crystal, molecules are connected via chains of intermolecular ...N—H...O—H...
Agnieszka Czapik   +2 more
doaj   +3 more sources

2,4-Dinitro-1-naphthol

open access: yesActa Crystallographica Section E, 2010
In the title compound, C10H6N2O5, the two fused rings are almost co-planar, with an r.m.s. deviation of 0.0163 Å. The nitro groups are oriented at dihedral angles of 2.62 (11) and 44.69 (11)° with respect ...
Amra Rubab   +3 more
doaj   +3 more sources

Simultaneous Detection of Naphthol Isomers with a 3D-Graphene-Nanostructure-Based Electrochemical Microsensor

open access: yesChemosensors, 2023
Naphthol is a widely used chemical and medical detection biomarker, but it is harmful to human health and the environment. Therefore, a highly sensitive detection method for naphthol is urgently required.
Jiaci Shi   +6 more
doaj   +1 more source

Removal of 1-naphthol from Water via Photocatalytic Degradation Over N,S-TiO2/ Silica Sulfuric Acid under visible Light [PDF]

open access: yesJournal of Advances in Environmental Health Research, 2022
Background: Naphthol, one of the naphthalene derivatives, is the most significant industrial chemical. It is widely used in the biochemical processes, production of dyes, and pharmaceutical industries.Methods: In the present study, N, S-doped TiO2 thin ...
Farhad Mahmoodi   +3 more
doaj   +1 more source

A Simple and Reliable Dispersive Liquid-Liquid Microextraction with Smartphone-Based Digital Images for Determination of Carbaryl Residues in Andrographis paniculata Herbal Medicines Using Simple Peroxidase Extract from Senna siamea Lam. Bark

open access: yesMolecules, 2022
A simple and reliable dispersive liquid-liquid microextraction (DLLME) coupled with smartphone-based digital images using crude peroxidase extracts from cassia bark (Senna siamea Lam.) was proposed to determine carbaryl residues in Andrographis ...
Sam-ang Supharoek   +3 more
doaj   +1 more source

Theoretical study on thermal decomposition mechanism of 1-nitroso-2-naphthol

open access: yesScientific Reports, 2022
1-nitroso-2-naphthol has thermal instability of thermal decomposition, spontaneous combustion and even explosion. Its thermal decomposition characteristics were tested by synchronous thermal analyzer (TGA/DSC); The activation energy of the thermal ...
Xiaohua Fan   +3 more
doaj   +1 more source

A novel RP-HPLC method for quantification of cholinesterase activity in human blood: An application for assessing organophosphate and carbamate insecticide exposure.

open access: yesPLoS ONE, 2022
Several methods have been reported to estimate Acetylcholinesterase (AChE) enzyme activity in blood samples. The Ellman assay is the most important among all but with several shortcomings, and there is a need to develop a method which is accurate ...
Sukesh Narayan Sinha   +4 more
doaj   +1 more source

Potentials of N-(2, 4-dinitro-1-naphthyl)-p-toluenesulphonamide and 2, 4-dinitro-1-naphthol as novel charge transfer acceptors in pharmaceutical analysis of some quinolones and cephalosporins

open access: yesFuture Journal of Pharmaceutical Sciences, 2022
Background Quinolones and cephalosporins are antibiotic agents with activity against Gram-positive and Gram-negative bacteria. They contain chromophores and amine groups which are electron-rich centres capable of donating electrons to electron-deficient ...
O. E. Umoh, O. A. Adegoke, D. E. Effiong
doaj   +1 more source

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