Search results for "TRIM"
showing 10 items of 1942 documents
Concentration dependence of amplified spontaneous emission in two oligo-(p-phenylenevinylene) derivatives
2005
Amplified spontaneous emission sASEd in optically pumped polystyrene sPSd films doped with two different oligo-sp-phenylenevinylened derivatives sOPVsd, with three s3-OPVd and five s5-OPVd monomer units is reported. It is observed that there is a maximum content of oligomer s25 wt. % for 3-OPV and 20 wt. % for 5-OPVd that can be introduced in the films, due to degradation sin 3-OPVd and ASE quenching sin 5-OPVd. Optimal concentrations swith minimum pump-intensity thresholds for the observation of ASEd of 15 wt. % and 9 wt. % are measured for the trimer and the pentamer, respectively. The concentration dependence of the ASE threshold is discussed in terms of the optical absorption spectra. G…
Selective determination of trimethylamine in air by liquid chromatography using solid phase extraction cartridges for sampling.
2004
Abstract The selective determination of trimethylamine (TMA) in air by liquid chromatography is reported. Sampling is effected by flushing air through C18-packed solid-phase extraction (SPE) cartridges at a flow rate of 15 mL/min for 15 min. Next, TMA is desorbed from the cartridges and injected into the chromatographic system. The analyte is then selectively retained on a precolumn ( 20 mm ×2.1 mm i.d., packed with 30 μm, Hypersil C18 phase), and derivatized on-line by injecting 9-fluorenylmethyl chloroformate (FMOC). Finally, the TMA-FMOC derivative is transferred to the analytical column ( 125 mm ×4 mm i.d., LiChrospher 100 RP18, 5 μm), and monitored at 262 nm. The method was applied to …
Determination of trimethoprim by the linear absorbances method
1995
The determination of trimethoprim in the presence of dyphylline, proxyphylline, theophylline and caffeine by the linear absorbances method is described. Collinear couples of wavelengths, for the interfering dyphylline-proxyphylline-theophylline-caffeine system (in H2SO4, 0.05 mol/L), are provided in order to allow the determination of the analyte in the presence of these interfering substances.
Comparison between micellar liquid chromatography and capillary zone electrophoresis for the determination of hydrophobic basic drugs in pharmaceutic…
2007
[EN] The determination of highly hydrophobic basic compounds by means of conventional reversed-phase liquid chromatographic methods has several drawbacks. Owing to the characteristics of micellar liquid chromatography (MLC) and capillary electrophoresis (CE), these techniques could be advantageous alternatives to reversed-phase chromatographic methods for the determination of these kinds of compounds. The objective of this study was to develop and compare MLC and CE methods for the determination of antipsychotic basic drugs (amitryptiline, haloperidol, perphenazine and thioridazine) in pharmaceutical preparations. The chromatographic determination of the analytes was performed on a Kromasil…
Vēsture: Latvijas Universitātes Žurnāls, Nr.11/12
2021
PP-329 Menstrual Angina Improved after Trimetazidine Treatment in Middle Age Female
2014
I diritti degli animali
2022
Il contributo affronta il tema dei diritti degli animali nell'ambito delle opere di Paolo Cendon, analizzandolo nel quadro delle fragilità esistenziali. Per danno da perdita dell’animale di affezione si intende, infatti, il danno non patrimoniale, di tipo esistenziale, derivante al proprietario dalla perdita o dal ferimento dell’animale di affezione, capace di caratterizzare e, talvolta, dominare, del tutto, la rete affettiva familiare. Non si tratta, cioè, di risarcire la lesione di un diritto alla vita dell’animale, bensì di compensare la lesione del diritto alla relazione affettiva intrattenuta con l’animale, nell’ambito della quale l’individuo può esplicare la propria personalità relazi…
Possible Fungistatic Implications of Betulin Presence in Betulaceae Plants and their Hymenochaetaceae Parasitic Fungi
2010
Betulin and its derivatives (especially betulinic acid) are known to possess very interesting prospects for their application in medicine, cosmetics and as bioactive agents in pharmaceutical industry. Usually betulin is obtained by extraction from the outer layer of a birch bark. In this work we describe a simple method of betulin isolation from bark of various species of Betulaceae trees and parasitic Hymenochaetaceae fungi associated with these trees. The composition of the extracts was studied by GC-MS, whereas the structures of the isolated compounds were confirmed by FTIR and 1H NMR. Additionally, the significant fungistatic activity of betulin towards some fi lamentous fungi was deter…
Un testigo del arte barroco "novator" valenciano de "La Vall de Gallinera": la iglesia parroquial de San Miguel de Benissivà
2002
El estudio nos presenta una muestra de recuperación de artesanías tradicionales en el medio rural como proyecto de enseñanza-aprendizaje de la Universitat de València y su Área de Conservació del Patrimoni Cultural, desde unos análisis histórico-material, histórico-artístico y técnico, en torno a la intervención llevada a cabo en la iglesia de San Miguel de Benissivà de Alicante. Buscando su valoración dentro del conjunto patrimonial al cual pertenece, se acomete una investigación sobre dicho templo y sus transformaciones, sus orígenes, evolución y creadores (entendidos dentro de la etapa artística valenciana de esplendor barroco y clasicismo matemático en la que se encuentran inmiscuidos),…
A Xylochemically Inspired Synthesis of Lamellarin G Trimethyl Ether via an Enaminone Intermediate.
2019
A concise high yielding synthesis of lamellarin G trimethyl ether has been achieved from precursors and solvents that can in principle be derived from xylochemical (woody biomass) sources. The route is comparatively green in that some reactions are performed without solvent or with relatively benign solvents. In addition, chromatographic purification of products is avoided, and only a single aqueous workup is performed. The novelty of the synthesis lies in the intermediacy of an enaminone for the construction of the central pyrrole ring. The overall yield of the product is among the highest reported to date.