نتایج جستجو برای: alkylphenols

تعداد نتایج: 298  

2006
Beatrice Jonsson

Present report is a review of the knowledge about the alkylphenols butylphenol (BP), octylphenol (OP) and nonylphenol (NP) with focus on mammalian toxicology and human exposure. The report includes an estimation of human OP and NP intake from Swedish fish. Because of few available data on BP, no conclusion could be drawn about human health risks due to BP-exposure. Alkylphenols have low acute t...

Journal: :Science of The Total Environment 2021

This study provided the first assessment of pyrethroids and pyrethrins in Minnesota, USA lake sediments, second one for alkylphenols (APs) nonylphenol ethoxylates (NPEs). Surficial sediments were collected 2017 from 30 small to medium-sized lakes, encompassing a variety watershed land uses ecoregions. These lakes targeted pool 50 randomly selected included National Lakes Assessment (NLA) study....

2009
Y K Agrawal J P Pancholi J M Vyas

Introduction Calixarene is a macrocycle or cyclic oligomer based on a hydroxyl alkylation product of phenols and aldehydes. Calixarenes have hydrophobic cavities that can hold smaller molecules or ions and belong to the class of cavitands known as host-guest chemistry. In 1940s, Zinke & Ziegler discovered base-induced reaction of p-alkylphenols with formaldehyde, which yields cyclic oligomers. ...

Journal: :Journal of chemical information and computer sciences 2000
Ovidiu Ivanciuc Teodora Ivanciuc Daniel Cabrol-Bass Alexandru T. Balaban

Organic compounds containing heteroatoms or multiple bonds can be conveniently represented as vertex- and edge-weighted molecular graphs. These atom and bond parameters can be computed for any organic compound with two parameter sets that we have recently defined, namely, the relative electronegativity X and the relative covalent radius Y weighting schemes. Structural descriptors computed with ...

Journal: :Polish journal of veterinary sciences 2013
J Kovarova J Blahova L Divisova Z Svobodova

Alkylphenols and their precursors, alkylphenol etoxylates, are a group of manmade chemicals used mainly as surfactants in domestic and industrial applications worldwide. It has been well established that they have endocrine disruption activity, hepatotoxic, genotoxic and other negative effects on animal and human health. In spite of the effort to reduce their use, they persist in the environmen...

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