Results 21 to 30 of about 2,546 (256)

Environmental fate and trophic transfer of synthetic musk compounds and siloxanes in Geum River, Korea: Compound-specific nitrogen isotope analysis of amino acids for accurate trophic position estimation

Environment International, 2022
Despite the extensive usage of synthetic musk compounds (SMCs) and siloxanes in various personal care products (PCPs), trophic magnification of such chemicals in aquatic environments remains unexplored.
Dokyun Kim, Ha-Eun Cho, Eun-Ji Won, Hye-Jin Kim, Sunggyu Lee, Kwang-Guk An, Hyo-Bang Moon, Kyung-Hoon Shin   +7 more
doaj   +1 more source

Synthesis of block copolymers of methyl siloxane, phenyl siloxane, vinyl siloxane, etc [PDF]

, 1979
Synthesis of homo poly(dimethylsiloxane) PDMS, homo poly(diphenylsiloxane PDPS, and di- and tri- block copolymers of PDMS and PDPS have been carried out by anionic living polymerization, using the following reagents: hexamethylcyclotrisiloxane, HMTS and hexaphenylcyclotrisiloxane, HPTS (monomers), n-BuLi and dilithium diphenyldisilanolate, DLS ...
Ibemesi, J.A., Meier, D.J.
openaire   +2 more sources

Assessment bioaccumulation factor (BAF) of methyl siloxanes in crucian carp (Carassius auratus) around a siloxane production factory

Ecotoxicology and Environmental Safety, 2021
Methyl siloxanes are identified as emerging persistent toxic compounds and the ecological environment risks of these compounds have been caused of great concern worldwide.
Weijun Guo, Yang Dai, Xiaoting Chu, Song Cui, Yeqing Sun, Yi-Fan Li, Hongliang Jia   +6 more
doaj   +1 more source

Unexpected Formation of a Silicon-Centered Spirocyclic Oligosiloxane Bearing Eight Pendant Ferrocene Units

Crystals, 2022
An intriguing but rare silicon-centered spirocyclic compound, spiro[5.5]octaferrocenylpentasiloxane (4) featuring silicon fused six-membered ferrocenyl-functionalized siloxane rings, has been obtained during the thermally induced transformation of ...
Sonia Bruña, Isabel Cuadrado, Josefina Perles   +2 more
doaj   +1 more source

Hybrid Disila-Crown Ethers as Hosts for Ammonium Cations: The O–Si–Si–O Linkage as an Acceptor for Hydrogen Bonding

Inorganics, 2018
Host-guest chemistry was performed with disilane-bearing crown ethers and the ammonium cation. Equimolar reactions of 1,2-disila[18]crown-6 (1) or 1,2-disila-benzo[18]crown-6 (2) and NH4PF6 in dichloromethane yielded the respective compounds [NH4(1,2 ...
Fabian Dankert, Kirsten Reuter, Carsten Donsbach, Carsten von Hänisch   +3 more
doaj   +1 more source

Approaches to the Functionalization of Organosilicon Dendrones Based on Limonene

Applied Sciences, 2023
Previously, we reported the synthesis of carbosilane and carbosilane-siloxane dendrons of various generations based limonene, a natural terpene. Limonene that contains two double bonds, namely cyclohexene and isoprenyl ones, was shown to undergo ...
Aleksei I. Ryzhkov, Fedor V. Drozdov, Georgij V. Cherkaev, Aziz M. Muzafarov   +3 more
doaj   +1 more source

Multi-matrix contamination by cyclic and linear siloxanes in a highly industrialized estuarine environment of Korea: source identification, seasonal variation, and bioaccumulation potential

Frontiers in Marine Science
Cyclic and linear siloxanes are widely used in personal care, industrial, and consumer products. To better understand their fate and ecological risks in estuarine environments, this study investigated spatial distribution, seasonal variations, and the ...
Wenming Chen, Sunggyu Lee, Hyun-Kyung Lee, Moonjin Lee, Hyo-Bang Moon   +4 more
doaj   +1 more source

Acute exacerbation of idiopathic pulmonary fibrosis after inhalation of a water repellent

International Journal of Occupational Medicine and Environmental Health, 2015
The natural course of idiopathic pulmonary fibrosis (IPF) is unpredictable at the time of diagnosis. Some patients may experience episodes of acute respiratory worsening that have been termed acute exacerbations.
David Bennett, Elena Bargagli, Rosa Metella Refini, Maria Grazia Pieroni, Antonella Fossi, Riccardo Romeo, Luca Volterrani, Maria Antonietta Mazzei, Paola Rottoli   +8 more
doaj   +1 more source

Thermal Stability and Thermodynamic Performances of Pure Siloxanes and Their Mixtures in Organic Rankine Cycles

Energies, 2022
Organic Rankine cycles are often the best solution for the conversion of thermal energy. The many working fluids include silicon oils. One crucial issue that determines the choice of a working fluid is its thermochemical stability, as this sets a limit ...
Gioele Di Marcoberardino, Costante Mario Invernizzi, Paolo Iora, Luca Arosio, Marcello Canavese, Angelo Lunghi, Antonella Mazzei   +6 more
doaj   +1 more source

Biogas Upgrading Approaches with Special Focus on Siloxane Removal—A Review

Energies, 2020
Biogas, a product of anaerobic digestion process that consists mainly of methane and carbon dioxide is a suitable alternative fuel if unwanted impurities are removed as they have a negative impact on the equipment.
Pardon Nyamukamba, Patrick Mukumba, Evernice Shelter Chikukwa, Golden Makaka   +3 more
doaj   +1 more source