Results 151 to 160 of about 23,178 (223)

LOS PRECIOS INTERNACIONALES DE MAÃZ Y PETRÓLEO Y SU EFECTO SOBRE EL PRECIO DE VENTA DE LOS BECERROS PARA EXPORTACIÓN EN SONORA, MÉXICO [PDF]

open access: yes
An analysis of the available information of years 2006 and 2007 at diverse sources in dependences, institutions and commercialization systems of cattle in Sonora was made.
Arras Vota, Ana Maria   +6 more
core   +1 more source

Desulfurization of Benzothiophene Derivatives by Solvent Extraction Coupled With Oxidation Using Oxomolybdenum(VI) Bis(pyrazolyl)methane Catalysts

open access: yesEuropean Journal of Inorganic Chemistry, Volume 29, Issue 13, 1 May 2026.
A polymeric hybrid material formulated as [MoO3(bis(pyrazolyl)methane)] has been prepared and used as a catalyst precursor for the complete oxidative desulfurization of a model diesel containing recalcitrant benzothiophene derivatives. The precursor is converted in situ to an oxodiperoxo active species which is retained in the recyclable extractant ...
Ana C. Gomes   +4 more
wiley   +1 more source

ANÃLISIS DE FACTIBILIDAD PARA LA INTRODUCCIÓN DEL BIODIESEL EN ECUADOR [PDF]

open access: yes
Increases in petroleum prices have affected the prices of its derived products. In addition, the interest in issues related to the environment and energy security at world-wide level has been increased.
Dominguez, Juan M., Espinel, Ramon L.
core   +1 more source

Cold EI—The Way to Improve GC‐MS and Increase Its Range of Applications

open access: yesMass Spectrometry Reviews, Volume 45, Issue 3, Page 548-582, May/June 2026.
ABSTRACT Gas chromatography‐mass spectrometry (GC‐MS) with Cold electron ionization (EI) is based on interfacing the GC and MS with a supersonic molecular beam (SMB) along with electron ionization of vibrationally cold sample compounds in the SMB in a contact‐free fly‐through ion source (hence the name Cold EI).
Aviv Amirav   +3 more
wiley   +1 more source

Hydrogen enhanced biodiesel production from Botryococcus braunii algal oil for sustainable fuel development. [PDF]

open access: yesSci Rep
Selvam M   +6 more
europepmc   +1 more source

Phenolic Compounds: From Traditional Uses to Innovative Applications and Everything in Between

open access: yesMolecular Nutrition &Food Research, Volume 70, Issue 9, 13 May 2026.
This review deals with many aspects related to the study of phenolic compounds, starting with advances in extraction, detection, and quantification methods, going through bioavailability, bioactivity, and beneficial health properties, and discussing antioxidant and antimicrobial uses and mechanisms.
Marcela de Sá Barreto da Cunha   +5 more
wiley   +1 more source

Effective Removal of Fe and Ca From Coal Fly Ash for High‐Purity and High‐Surface‐Area Zeolite X Synthesis: A Comparative Study of Acid Refluxing and Acid Roasting Methods

open access: yesChemistryOpen, Volume 15, Issue 5, May 2026.
Coal fly ash (CFA) is an abundant industrial waste rich in silica and alumina and represents a viable feedstock for zeolite synthesis; however, high levels of calcium and iron limit zeolite purity and crystallisation. This study evaluates acid refluxing and acid roasting as pre‐treatment strategies for the simultaneous removal of Ca and Fe from high ...
Emmanuel Monkgomotsi Victor Gaolefufa   +4 more
wiley   +1 more source

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