Search results for "Carboni"
showing 10 items of 357 documents
H2-Antihistaminika, 28. Mitt. Synthese und H2-antagonistische Wirkung 3-(3-piperidinomethyl-phenoxy)propyl-substituierter Kohlensäurederivate und Ana…
1986
Es wurden 3-(3-piperidinomethyl-phenoxy)propyl-substituierte Kohlensaurederivate wie Harnstoffe, Thioharnstoffe, Guanidine und Cyanoguanidine sowie analoge Nitroethendiamine dargestellt und am isolierten Meerschweinchenvorhof und zum Teil an der histaminstimulierten Sauresekretion der narkotisierten Ratte auf H2-antagonistische Wirkung untersucht. H2-Antihistaminics, XXVIII: Syntheses and H2-Antagonistic Activity of Derivatives of Carbonic Acid and Analogues Carrying a 3-[3-(Piperidinomethyl)phenoxy]propyl Substituent Derivatives of carbonic acid such as ureas, thioureas, guanidines, and cyanoguanidines as well as the analogous nitroethenediamines were prepared with a 3-[3-(piperidinomethyl…
Hydrocracking ofn-heptane. Study of NiO-MoO3catalysts supported on a HY ultrastable zeolite
1986
The hydrocracking of n-heptane in the temperature range of 573 to 623 K and at 2.45 × 106 Pa pressure has been employed as a test reaction for the study of Ni—Mo bifunctional catalysts supported on a HY ultrastable zeolite. Two groups of catalysts containing 8 and 12 wt% of MoO3 and different amounts of NiO have been studied. In both series a maximum in the activity has been obtained for catalysts with a Ni/Mo atomic ratio of 0.8-1.0. The order of the impregnation of the oxides can have little influence on the activity. The most active catalyst has been obtained when the zeolite is exchanged with NH+4 ions until the Na+ level is less than 2% of the original and calcined at 823 K to obtain a…
The N Variscan margin of the Ruhr coal district (Western Germany): structural style of a buried thrust front?
1988
The Ruhr coal district represents part of an external fold and thrust belt of the Variscan orogen in central Europe. Extensive mining exposed molasse-type, coal-bearing clastic sequences of Upper Carboniferous age, deformed by folding and thrusting. Thrusts range in scale from decameters to 40 kilometers along strike but displacements are below 2.5 km. They are distributed in various stratigraphic levels and no regional detachment horizon is exposed. Displacement is mainly towards NW (towards the foreland) but also towards SE. The thrusts are bound to stockwerk-tectonics and die out towards depth frequently antithetic to the exposed strata. Folds vary in wavelength from decameters to more t…
Influence of basement heterogeneity on the architecture of low subsidence rate Paleozoic intracratonic basins (Ahnet and Mouydir basins, Central Saha…
2018
Abstract. The Paleozoic intracratonic North African Platform is characterized by an association of arches (ridges, domes, swells or paleo-highs) and low subsidence rate syncline basins of different wavelengths (75–620 km). The structural framework of the platform results from the accretion of Archean and Proterozoic terranes during the Pan-African orogeny (750–580 Ma). The Ahnet and Mouydir basins are successively delimited from east to west by the Amguid El Biod, Arak-Foum Belrem, and Azzel Matti arches, bounded by inherited Precambrian sub-vertical fault systems which were repeatedly reactivated or inverted during the Paleozoic. Major unconformities are related to several tectonic events …
Un nouveau modèle d'âge pour l'Autunien du bassin d'Autun à partir de datations U-Pb sur des tonsteins
2021
National audience; Le bassin d’Autun, bassin historique français stéphano-permien connu pour ses huiles de schistes et ses fossiles de plantes et vertébrés terrestres, a permis de définir le stratotype Autunien au 19ème siècle, référence pour les « étages » continentaux du Permien d’Europe. Pendant très longtemps, les âges du bassin et du stratotype Autunien ont reposé sur les biozonations établies par les microflores et macroflores, plus récemment à partir des faunes d’insectes, de crustacés et d’amphibiens (Schneider et al., 2020). L’équivalence d’âge en étages marins reposait sur des corrélations complexes à partir d’environnements mixtes marins et continentaux permettant d’utiliser, ent…
Innesto di catene polimeriche sulla superficie di nanotube di carbonio mediante reazione di accoppiamento radicalico
2015
La modifica di nanotubi di carbonio (CNT) attraverso innesto (grafting) di catene polimeriche sulla loro superficie è un metodo efficace per promuovere la dispersione di queste cariche a livello nanometrico in una matrice polimerica. La funzionalizzazione covalente di CNT con catene polimeriche viene generalmente ottenuta sia attraverso crescita controllata di polimeri a partire dalle pareti della nanocarica mediante metodi "grafting from" sia attraverso metodi di "grafting to" che si basano sulla reazione di condensazione tra polimeri preformati e CNT opportunamente modificati. In questo lavoro viene proposto un nuovo approccio di tipo "grafting to" per innestare catene polimeriche su CNT …
The efficacy and safety of unfixed and fixed combinations of latanoprost and other antiglaucoma medications.
2002
Adjunctive therapy for the management of glaucoma is commonly used. Unfixed combinations of the prostaglandin analog latanoprost and other glaucoma medications have been demonstrated to effectively lower intraocular pressure (IOP). The range of reported additional reductions in IOP compared to a monotherapy baseline are as follows: latanoprost-timolol (13-37%), latanoprost-pilocarpine 2% (7-14%), latanoprost and carbonic anhydrase inhibitors (15-24.1%), and latanoprost and dipivefrin (15-28%). There is a fixed combination of latanoprost (0.005%) and timolol (0.5%) that has been investigated in Phase III trials in Europe and the United States. In these trials, it was noted that the efficacy …
Update on topical carbonic anhydrase inhibitors
2001
Topical carbonic anhydrase inhibitors are a novel addition to the armamentarium of medical glaucoma treatment; dorzolamide has been available since 1995 and brinzolamide since 1998. They lower intraocular pressure by inhibiting carbonic anhydrase, a key enzyme for aqueous humor formation. Intraocular pressure-lowering activity of the substances appears to be the same and is similar to that of most other agents, but it does not reach the activity of the unselective beta-blocker timolol or the prostaglandin latanoprost. On concomitant treatment, additivity is reached with all other topical agents. A possible improvement of blood flow may offer an additional benefit, but its significance for t…
Addition of a fixed combination of brinzolamide 1%/timolol 0.5% to prostaglandin monotherapy in patients with glaucoma or ocular hypertension
2011
Katrin Lorenz1, Klaus Rosbach2, Andreas Matt3, Norbert Pfeiffer11University Medical Center, Johannes Gutenberg-Universität Mainz, Mainz, Germany; 2Private practice, Mainz, Germany; 3Private practice, Köln-Hohenhaus, GermanyBackground: This study was conducted to evaluate the safety and efficacy of adding a fixed combination of brinzolamide 1%/timolol 0.5% to prostaglandin analog (PGA) monotherapy in patients with primary open-angle glaucoma, pigment dispersion glaucoma, or ocular hypertension who require additional intraocular pressure (IOP) reduction.Methods: This was a prospective, multicenter (n = 5), open-label, single-arm, Phase IV clinical trial in which patients cur…
Energy and environmental assessment of powder and structured Ni/GDC catalysts
2019
Power -to-Gas technologies have been recently introduced as a relevant strategy allowing higher shares of renewable generation in the energy sector