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Matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-TOF-MS) provides detailed information for the analysis of ethoxylated alcohols and polymers. In this study, five friction reducers used in commercial hydraulic fracturing processes were analyzed in their as-received form to identify their ethoxylated alcohol content. The friction reducers were then subjected to lab-simulated downhole conditions. Characterization of friction reducers before and after being subjected to reactive conditions can provide fingerprints associated with produced oilfield waste for source apportionment and information on the stability of these key hydraulic fracturing additives.
This article was published in the following journal.
Name: Rapid communications in mass spectrometry : RCM
The friction properties of the water-based surfactant system C8 (octyl ß-D-glucopyranoside) are investigated both at the macro and nanoscale in ring-on-plate and AFM friction experiments, respectivel...
We report herein a ruthenium-catalyzed, oxazoline-directed strategy for C-H allylation of aryl oxazolines using allylic alcohols as the coupling partner. The present transformation unravels the unusua...
An electrostatic friction modulation device based on a tablet computer was used to present pattern stimuli to the fingertip for two tasks: detecting patches of friction and matching a frictional patte...
Co/nano-CeO composite layers were developed by electro-codeposition method from a cobalt electrolyte containing dispersed CeO nanoparticles. The tribocorrosion performances of both Co/nano-CeO and pur...
Though multiple high-level comparative studies have been performed for matrix-assisted autologous chondrocyte transplantation (MACT), quantitative reviews synthesizing best-available clinical evidence...
Flexibility, agility and muscle strength are key factors to either win or lose a game. Recently the effect of a new technique, deep transverse friction massage (DTFM), on muscle extensibil...
With this study the investigators investigate the effects of amino acids (tryptophan in two different concentrations, leucin) and sugar alcohols (xylitol, erythritol) on satiety mechanisms...
Despite the popularity and proved safety of prepectoral implant-based reconstruction, there is little evidence on long-term results and variables which could influence surgical outcome. So...
The aim of this study is to evaluate the effects of different matricing techniques either sectional matrix or circumferential matrix on reproduction of optimum proximal contacts and contou...
This study examines the development of Lid Wiper Epitheliopathy (LWE) in individuals fit with contact lenses having difference coefficients of friction (CoF)
Alkyl compounds containing a hydroxyl group. They are classified according to relation of the carbon atom: primary alcohols, R-CH2OH; secondary alcohols, R2-CHOH; tertiary alcohols, R3-COH. (From Grant & Hackh's Chemical Dictionary, 5th ed)
A mass spectrometric technique that is used for the analysis of large biomolecules. Analyte molecules are embedded in an excess matrix of small organic molecules that show a high resonant absorption at the laser wavelength used. The matrix absorbs the laser energy, thus inducing a soft disintegration of the sample-matrix mixture into free (gas phase) matrix and analyte molecules and molecular ions. In general, only molecular ions of the analyte molecules are produced, and almost no fragmentation occurs. This makes the method well suited for molecular weight determinations and mixture analysis.
Usually high-molecular-weight, straight-chain primary alcohols, but can also range from as few as 4 carbons, derived from natural fats and oils, including lauryl, stearyl, oleyl, and linoleyl alcohols. They are used in pharmaceuticals, cosmetics, detergents, plastics, and lube oils and in textile manufacture. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 5th ed)
Therapy assisted by the use of a horse and/or its movement, including equine-assisted psychotherapy, horseback riding, and hippotherapy.
Alcohols derived from the aryl radical (C6H5CH2-) and defined by C6H5CHOH. The concept includes derivatives with any substituents on the benzene ring.
Multiple Sclerosis MS
Multiple sclerosis (MS) is the most common disabling neurological condition affecting 100,000 young adults in the UK. The condition results from autoimmune damage to myelin, causing interference in nerve signaling. Symptoms experienced depend on the pa...