Results 81 to 90 of about 39,041 (288)

Sampling and analyses of polychlorinated dibenzo dioxins (PCDDs) and polychlorinated dibenzo furans (PCDFs) emissions in South Africa: A practitioner’s guide

open access: yesClean Air Journal, 2016
Dioxins and furans are toxic chemicals. A draft report released for public comment in September 1994 by the US Environmental Protection Agency clearly describes dioxin as a serious public health threat.
D.L. Posthumus, G.B. Woollatt
doaj   +1 more source

Silver and platinum-catalysed addition of O–H and N–H bonds to allenes [PDF]

open access: yes, 2014
Transition-metal catalysed nucleophile addition to allenes is a very powerful tool for the synthesis of functionalised molecules containing heteroatoms, heterocycles in the intramolecular version, or allyl derivatives in the intermolecular version.
Munoz-Herranz, Maria
core   +1 more source

Synthesis of an Enzyme‐Triggered Chitosan‐Based Drug Delivery System for Peri‐Implantitis Prevention

open access: yesChemistry – A European Journal, EarlyView.
ABSTRACT Dental implants have become a leading solution for tooth loss, yet bacterial infections remain a major complication. Antibacterial implant coatings are an important approach to reduce or prevent bacterial infections at the implant. Given the oral cavity's complex microbiome and the importance of some commensal bacteria, it is crucial to ...
Nelly Senze Nnane   +7 more
wiley   +1 more source

Gold(I)-catalyzed formation of furans from γ-acyloxyalkynyl ketones

open access: yesBeilstein Journal of Organic Chemistry, 2013
Various γ-acyloxyalkynyl ketones were efficiently converted into highly substituted furans with 2.5 mol % of triflimide (triphenylphosphine)gold(I) as a catalyst in dichloroethane at 70 °C.
Marie Hoffmann   +4 more
doaj   +1 more source

Volatile organic compounds and consumer preference for meat from suckling goat kids raised with natural or replacers milk [PDF]

open access: yes, 2019
Most of European Union goats are slaughtered with carcase weights between 5 kg and 11 kg. Some farmers rear kids with milk replacers to produce cheese with the dams’ milk.
Alcalde Aldea, María Jesús   +6 more
core   +3 more sources

Copper‐ and Silver‐Catalyzed Reactions of Active Methylene Isocyanides: Facile Access to Highly Substituted Five‐ and Six‐Membered Heterocycles

open access: yesChemistry – A European Journal, EarlyView.
This review summarizes recent advances in copper‐ and silver‐catalyzed reactions of active methylene isocyanides for the synthesis of highly substituted five‐ and six‐membered heterocycles. Emphasis is placed on [3+n] cycloadditions, annulations, and asymmetric strategies, highlighting current limitations and future opportunities in heterocycle ...
Jimil George, Kyungsoo Oh
wiley   +1 more source

A Diels–Alder probe for discovery of natural products containing furan moieties

open access: yesBeilstein Journal of Organic Chemistry
Natural products (NPs) are fantastic sources of inspiration for novel pharmaceuticals, oftentimes showing unique bioactivity against interesting targets.
Alyssa S. Eggly   +5 more
doaj   +1 more source

Novel carbocationic rearrangements of 1-styrylpropargyl alcohols

open access: yesBeilstein Journal of Organic Chemistry, 2015
The dehydration and subsequent cyclization reactions of 1-styrylpropargyl alcohols was examined. In the course of these studies, numerous scaffolds were synthesized, including a furan, a cyclopentenone, an acyclic enone and even a naphthalenone.
Christine Basmadjian   +2 more
doaj   +1 more source

Changes during the extrusion of semolina in mixture with sugars

open access: yesCzech Journal of Food Sciences, 2001
Wheat semolina and its mixtures with 5% glucose, fructose of sucrose were processed in a sigle screw extruder at the maximum temperature of 140°C and the processing time of 30 s.
A. Farouk Mansour   +3 more
doaj   +1 more source

Furanic Rigid Foams, Furanic-Based Bioplastics and Furanic-Derived Wood Adhesives and Bioadhesives

open access: yes, 2022
In this chapter, we discuss pure furanic foams and tannin-furanic foams as fire-resistant, environmentally friendly, rigid biofoams. We also examine furanic wood adhesives in which a major furan portion is coupled with either synthetics or bioadhesives.
Antonio, Pizzi,, Anish, Khan,
openaire   +3 more sources

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