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Showing 1 to 20 of 53 for “"Glycerin"”.
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Glycerin and the market
Glycerin, a trihydric alcohol, had once enjoyed a good market value but, is now faced with global oversupply and this makes the market volatile. It is a byproduct of biodiesel production thought as an added value to biodiesel operations. It is now faced with an unpredictable market and probably …
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The Chemistry of Borax on Glycerin
The object of this paper is to explain how glycerin and borax react with water to produce an acid, and that the acid produced is not boric acid.|That borax and glycerin react with water to produce an acid clearly manifests itself in the presence of a bicarbonate by an effervescence that is most …
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Glycerin reformation in high temperature and pressure water
<p>"The noncatalytic reformation of glycerin in supercritical water was studied in a Haynes 282 tubular reactor. In order to determine which parameters were the most influential, a 2³ experimental matrix was conducted, with temperatures of 500 and 700⁰C, water/glycerin molar ratios of 3:1 and 13:1, …
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Reorientierungsdynamik von Glycerin aus temperaturabhängigen Multi-Kern-NMR-Messungen
Nuclear magnetic resonance is a powerful tool for the investigation of the dynamic of liquids. By determining the longitudinal or spin-lattice-relaxation rates of proton-, deuteron-, and carbon-13-nuclei together with the 13C-nuclear Overhauser enhancement factors (NOE factors) it was possible to …
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The effect of supercritical water on crude glycerin solution
"Crude glycerin solution, a principal byproduct of the conventional biodiesel process, was reacted in supercritical water using a specially designed Haynesʼ Alloy 282 reactor system for the production of hydrogen rich syngas. The effects of temperature, pressure, water-to-carbon molar ratio, …
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Untersuchungen zur Inaktivierung und Reaktivierung der Coenzym B12-abhaengigen Glycerin-Dehydratasen aus Citrobacter freundii und Clostridium pasteurianum
Die Coenzym B12 abhaengige Glycerin-Dehydratase aus Citrobacter freundii ist an der anaeroben Umsetzung von Glycerin involviert. Sie katalysiert die Dehydratisierung von Glycerin zu beta-Hydroxypropionaldehyd. Das Enzym unterliegt einer sogenannten ''Suicide''-Inaktivierung durch eben dieses S! …
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Konstruktion und Durchmusterung von Metagenombanken: Identifizierung und Charakterisierung von Genen und Genprodukten von am Polyol-Stoffwechsel beteiligten Oxidoreduktasen und Coenzym B12-abhängigen Dehydratasen
… neuer Gene für Koenzym B12-abhängige Glycerin-und Diol-Dehydratasen wurden vier sogenannte Metagenom-Banken hergestellt. Als Proben wurde Boden eines Zuckerrübenfeldes, Sediment des Flusses Grone (beide nahe Göttingen, Deutschland), Sediment des Solar Lake (Ägypten) und Sediment des …
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An experimental investigation of the breakup of a viscoelastic non-newtonian fluid in a supersonic stream
… A limited number of test runs were made with glycerin in order to make a comparison between the behavior of Newtonian and viscoelastic non-Newtonian fluids. Several areas concerning the disintegration of the viscoelastic non-Newtonian fluid were investigated, including the effects of free …
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Einfluss von Kernquadrupolmomenten auf die Amplitude von Polarisationsechose in amorphen Festkörpern
… haben wir an amorphem Glycerin den Zerfall der Echoamplitude in Abhängigkeit des Magnetfelds untersucht. Durch partielles Deuterieren wurden gezielt Atome mit Kernquadrupolmoment und bekannter Quadrupolfrequenz in das System eingebracht. Der beobachtete Isotopeneffekt …
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Atlantic Green Chemicals : bio-glycol plants : business plan
… (IPD) about building and managing three Glycerin to Glycols Plants based on IPD patent that transforms glycerin (a byproduct from bio-diesel production) to Propylene Glycol (PG) using steam and hydrogen. PG has till now been made from fossil fuel in oil refineries. PG is in high demand as …
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Behavior of Polymer Solutions and Melts in Shearing and Elongational Flow Using Streak Photography and Birefringence
… carried out for the kinematics of a Newtonian (glycerin solution) and a non-Newtonian (polyacrylamide solution) fluid undergoing flow past a radially oriented cylinder in both a converging and uniform flow field. The glycerin and polyacrylamide solutions are found to follow Newtonian and power …
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Synthesis and Characterization of Solution and Melt Processible Poly(acrylonitrile-co-methylacrylate) statistical copolymers
… Mw = 200 kg/mol to 160 0C as measured via DSC. Glycerin, ethylene glycol and glycerin/water combinations were investigated as potential plasticizers for high molecular weight (~200,000 g/mol), high acrylonitrile (93-96 mole:mole %) content poly(acrylonitrile–co-methyl acrylate) statistical …
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Valorization of banana peels to obtain a bioplastic from acetylated starch
… banana peels, the pH and the concentration of glycerin. To evaluate the quality of the bioplastic obtained, biodegradability tests, tensile tests and Fourier transform infrared spectroscopy (FTIR) were carried out. The results obtained revealed an 80% efficiency in the conversion of banana …
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COMMUNITY ANALYSIS OF A UNIQUE FULL-SCALE WASTEWATER TREATMENT PLANT AS REVEALED BY 454-PYROSEQUENCING
… experiences highly variable flow and utilizes glycerin as a supplemental carbon source due to low-strength carbon influent. In addition, the plant experienced an upset in 2012 with respect to excessive tardigrade growth. In response introduced sludge from another wastewater treatment plant …
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Measured Electron Spin Relaxation Rates in Frozen Solutions of Azurin, Vitamin-B12r, and Nitrosyl Ferrous Myoglobin
Rates in frozen glycerin/water solutions at temperatures between 1.4 K and 20 K are reported for a copper-containing protein, azurin, and a cobalt-containing biomolecular complex, vitamin B$\sb{\rm 12r}$, the paramagnetic product of the photolysis of coenzyme B$\sb $. Results are interpreted in …
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Development of a topical epigallocatechin gallate (EGCG) formulation
… for their ability to form non-aqueous gels with glycerin, the solvent found most suitable for enhancing EGCG's stability. Methacrylic acid derivatives (Carbopols RTM) were found to be the most efficacious gelling agents. Carbopol RTM 974, best known for its mucoadhesive properties, was found to …
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Kritické zhodnocení vybraných metod stanovení síranů ve vodách
… – 20 mg.l-1. Pro stabilizaci koloidu byl využit glycerin, samotné vysrážení síranů bylo provedeno ve formě BaSO4. Z volumetrických metod byla použita titrace na dithizon jako indikátor při použití Pb(NO3)2 jako odměrného činidla. Dále indikátor bromsulfonazo III, který byl použit pro stanovení …
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