Results 71 to 80 of about 38,056 (273)

Methyl on the Bridge: 2‐Methyl Propellane as Precursor for 1,3‐Substituted 2‐Methylated Bicyclo[1.1.1]Pentanes

open access: yesChemistry – A European Journal, EarlyView.
The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve   +4 more
wiley   +1 more source

Synthesis, metal complexation and biological evaluation of a novel semi-rigid bifunctional chelating agent for 99mTc labelling [PDF]

open access: yes, 2006
A novel bifunctional chelating agent bearing an aromatic ring has been synthesised and characterised. This ligand formed well-defined oxorhenium complexes.
Benoist, Eric   +4 more
core   +2 more sources

Investigations Into the Human Metabolism of Trestolone (7α‐Methyl‐19‐Nortestosterone)

open access: yesDrug Testing and Analysis, EarlyView.
As the known metabolites of 7α‐methyl‐19‐nortestosterone (MENT), M1 and M2, suffer from chromatographic issues under routine doping control conditions, the human metabolism of MENT was reinvestigated. From the numerous new metabolites detected, especially, M5 and M10 were identified as the most promising candidates to be implemented into routine ...
Thomas Piper   +2 more
wiley   +1 more source

Type of Adsorbent and Column Height in Adsorption ProcessofUsedCookingOil [PDF]

open access: yes, 2015
. The purpose of this research was to find out the best adsorbent and column height that can adsorb color and soluble impurities substances in used cooking oil.
Hasnelly, DS   +2 more
core   +1 more source

Contribution of Free Fatty Acids to Emulsion Building and Stability: Understanding the Mechanism From the Case Study of a Crude Red Palm Oil (Elaeis guineensis)—Based Emulsion Consumed in Africa and Known as Achu Soup/Sauce Jaune/Ncha

open access: yesFood Chemistry International, EarlyView.
In an aqueous alkaline medium, fatty acids (from the hydrolysis of triglycerides or freely present in the oil) are ionised in order to form emulsifiers (carboxylates) which will physically stabilise the prepared emulsion. The higher the free fatty acids content of the oil and alkalinity of the solution, the higher will be the stability of the prepared ...
Ngoualem Kégah Franklin   +3 more
wiley   +1 more source

Beeswax: Food and beyond

open access: yesFood Biomacromolecules, EarlyView.
Abstract Honeybees (Apis mellifera L.) are an important class of insects that are the most beneficial in terms of economy. Beeswax is the second most important bee products after honey. Its commercial importance is due to its antimicrobial, antioxidant, anti‐inflammatory and antiseptic as well as regenerative properties.
Rajshri Naveen, Manickam Loganathan
wiley   +1 more source

Adhesive properties of water-soluble and biodegradable hot-melt adhesive based on partially saponified poly(vinyl acetate)

open access: yesMaterials Research Express, 2020
Partially saponified low molecular weight (LMW) PVAc was synthesized and blended with a tackifier for use as hot-melt adhesive with water-solubility and biodegradibility.
Yong-Ho Kim   +3 more
doaj   +1 more source

Optimization in Eugenol Production from Clove Oil with Saponification – Neutralization Process by using Response Surface Methods [PDF]

open access: yes, 2014
The objective of this research was to obtain optimum condition in eugenol production from clove oil with response surface methods. Clove oil was founded from essential oil cluster in Batang district Central Java.
Cahyono, Bambang   +3 more
core  

Transannular O‐Heterocyclization Reactions of Cyclododeca‐1,5,9‐triene Derivatives: A New Concept for the Preparation of Key Intermediates for Total Syntheses of Annonaceous Acetogenins

open access: yesHelvetica Chimica Acta, EarlyView.
Four stereogenic centers are formed diastereoselectively in one step from a cyclic (E,E)‐1,5‐diene system using an electrophilic addition reaction. Subsequent ozonolytic cleavage of the intact Z‐double bond, followed by intramolecular nucleophilic substitution, yields an octahydroterfurandione with a threo,cis,threo configuration, an arrangement found ...
Holger Schimanski   +6 more
wiley   +1 more source

Separation of gadolinium and europium from chloride media by the solvent extraction technique

open access: yesREM: International Engineering Journal, 2019
Obtaining rare earth elements (REE) is a complicated task, due mainly to the difficulty of separating and purifying them. Solvent extraction is the most widely used technique for separating REE, and the most common extractants used are organophosphorus ...
Ysrael Marrero Vera   +1 more
doaj   +1 more source

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