Objetivo: Determinar la incidencia de cultura tributaria en gestión recupero del Impuesto General a las Ventas (IGV) Organizaciones No Gubernamentales (ONG) proyección social el Perú inscritas Agencia Peruana Cooperación Internacional (APCI). Método: La investigación fue enfoque cualitativo, con alcance descriptivo y diseño no experimental; se obtuvo información 1 502 ONG APCI. técnica utilizad...

Extracts of apple fruits (Malus domestica cv. "Brettacher") were analysed by HPLC with photodiode array detection. An unknown peak was monitored displaying the same retention time as isorhamnetin 3-O-glucoside. Preliminary identification of the isorhamnetin aglycone was performed by comparison of UV spectral data of the unknown compound with a reference substance. Using atmospheric pressure che...

A highly sensitive screening method based on high performance liquid chromatography atmospheric pressure ionization mass spectrometry (HPLC-API-MS) has been developed for the analysis of 21 nitroaromatic, nitramine and nitrate ester explosives, which include the explosives most commonly encountered in forensic science. Two atmospheric pressure ionization (API) methods, atmospheric pressure chem...

A set of titania–silica mixed oxide materials were prepared by a cosolvent-induced gelation method using ethanol and toluene as solvent cosolvent, respectively. These extensively characterized utilizing several characterization techniques assessed for phenol degradation under UV illumination. The follows first-order kinetics, fragmented products formed during the qualitatively identified high p...

An on-line UV-HPLC / APCI-MS (atmospheric pressure chemical ionization) tandem by a platinium C18 column with an isocratic solvent system after optimizing was applied to the separation and the identification of different carotenoids including astaxanthin, canthaxanthin, apocarotenoic ester, torularhodin and beta carotene. This method was used to identify particular carot...

Carotenoids are naturally occurring fat-soluble pigments found in many organisms. Because of their extensively conjugated carbon–carbon double bond system, carotenoids potent antioxidants. Although the most abundant carotenoid and best singlet oxygen quencher red tomatoes is lycopene, profiles may vary between genotypes. The objective this work was to perform profile indentification using HPLC-...