A5008036764- Organic and Molecular Conductors Research
- Magnetism in coordination complexes
- Crystallography and molecular interactions
- Analytical Chemistry and Chromatography
- Organic Chemistry Cycloaddition Reactions
- Metabolomics and Mass Spectrometry Studies
- Solid-state spectroscopy and crystallography
- Phytochemicals and Antioxidant Activities
- Mass Spectrometry Techniques and Applications
- Ion Channels and Receptors
- Reproductive Biology and Fertility
- X-ray Diffraction in Crystallography
- Biodiesel Production and Applications
- Lysosomal Storage Disorders Research
- Lipid Membrane Structure and Behavior
- Postharvest Quality and Shelf Life Management
- Photochromic and Fluorescence Chemistry
- Crystallization and Solubility Studies
- Lipid metabolism and biosynthesis
- Sphingolipid Metabolism and Signaling
- Plant Stress Responses and Tolerance
- Spectroscopy Techniques in Biomedical and Chemical Research
- Plant Micronutrient Interactions and Effects
- Research in Cotton Cultivation
- Molecular Junctions and Nanostructures
Universidad de Zaragoza
1996-2024
Instituto de Nanociencia y Materiales de Aragón
2012-2024
Consejo Superior de Investigaciones Científicas
1996-2024
Instituto de Ciencia de Materiales de Sevilla
2012-2015
Instituto de Ciencia de Materiales de Madrid
2001
Durham University
1998
Summary Studies of Iron (Fe) uptake mechanisms by plant roots have focussed on Fe( III )‐siderophores or II ) transport systems. deficency also enhances root secretion flavins and phenolics. However, the nature these compounds, their outside role in Fe nutrition are largely unknown. We used HPLC / ESI ‐ MS ( TOF (ion trap) to characterize fluorescent phenolic‐type compounds accumulated exported culture medium Arabidopsis plants response deficiency. Wild‐type mutant altered either...
Quantification, using an accurate analytical approach, of capsinoids and capsaicinoids was performed on three chili pepper (Capsicum spp.) genotypes: "Chiltepı́n", "Tampiqueño 74", "Bhut Jolokia" at various stages fruit development. The accumulation capsinoids, in all these peppers started between 10 to 20 days post-anthesis (dpa), increased reached the highest capsinoid amount 40 dpa, then decreased until 60 dpa. Conversely, could already be determined dpa their pattern different from that...
Steric interactions between the anthraquinoid core and 1,3-dithiole dicyanomethylene groups play a key role in determining physical properties of system 1. The intramolecular charge transfer this donor–π-acceptor species have been explored cyclic voltammetric data, X-ray crystal structures ab initio calculations are also reported.
Thlaspi arvense (Pennycress) is an emerging feedstock for biofuel production because of its high seed oil content enriched in erucic acid. A transcriptomic and a lipidomic study were performed to analyze the dynamics gene expression, glycerolipid acyl-group distribution during maturation. Genes involved fatty acid biosynthesis expressed at early stages encoding enzymes Kennedy pathway like diacylglycerol acyltransferase1 (TaDGAT1), lysophosphatidic acyltransferase (TaLPAT) or glycerol...
The question of whether exosome lipids can be considered as potential cancer biomarkers faces our current limited knowledge their composition. This is due to the difficulty in isolating pure exosomes, variability biological sources from which they are extracted, and uncertainty methods for lipid characterization. Here, we present a procedure isolate exosomes obtain deep, repeatable, rapid phospholipid (PL) composition extracts, embryonic murine fibroblasts (NIH-3T3 cell line) none (B16-F1)...
High-performance thin-layer chromatography was directly combined with electrospray mass spectrometry (ESI-MS) for structural identification issues below the level of lipid classes in complex samples through a portable, automated, elution-based interface. For as diverse biodiesel and human plasma, separation conditions using Automated Multiple Development were selected each case to provide zones narrow enough ensure direct transfer them ESI-MS. The respective zone interest can be at will....
Hyphenated HPTLC has been used to analyze several neutral sphingolipids acting as lysosomal storage disease (LSD) biomarkers. Automated multiple development (AMD) provides separation of lipid peaks, which are detected and quantified using fluorescence detection by intensity changes (FDIC) after primuline post-impregnation. A final online transfer a mass spectrometer means an elution-based interface allows their identification electrospray ionization (ESI) atmospheric pressure chemical...
Synthetic routes to the first unsymmetrical annelated tetrathiafulvalene–S2O4 crowns are reported; methodology is versatile, affording parent system 8, functionalised derivatives 6, 7 and 9–12, amphiphilic 6 13. UV–VIS spectroscopic studies of metal binding (Na+, Ag+ Ba2+) crown–TTF systems 8 13, bis(crown)–TTF 14 have been performed in solution, stability constants calculated. The data establish that for crown compounds 13 1 : complexes formed, whereas bis(crown) compound both [14(Na+)] 2...
Fertilization is a key physiological process for the preservation of species. Consequently, different mechanisms affecting sperm and oocyte have been developed to ensure successful fertilization. Thus, acrosome reaction necessary egg coat penetration sperm-oolema fusion. Several molecules are able induce reaction; however, this should be produced coordinately in time space allow success fertilization between gametes. The goal study was analyze metabolites secreted by cumulus-oocyte-complex...
High-performance thin-layer chromatography (HPTLC)-densitometry was directly combined with electrospray (ESI) tandem mass spectrometry for obtaining rapid and relevant structural identification of phospholipids (PL) species associated to membrane proteins (MP), in non-sulfur, purple bacteria having photosynthetic activity. Thus, belonging phosphatidylcholines (PC), phosphatidylethanolamines (PE), cardiolipins (CL) phosphatidylglycerols (PG) MP were investigated bacterial extracts from...
Langmuir-Blodgett (LB) films of the novel amphiphilic ethylenedithiotetrathiafulvalene derivative [EDT–TTF–CH2OC(O)C17H35, 5] assembled on a range solid substrates have room temperature in-plane do conductivity values as high σrt= 10–2–10–3 S cm–1 deposited; iodine doping results in an immediate decrease to σrt=ca. 10–6 cm–1, which subsequently increases over few hours 10–3 stable mixed-valence state is attained. The LB been characterized by ellipsometry, UV–VIS spectroscopy and cyclic...
Abstract Electron ionization mass spectra of ethylenedithiotetrathiafulvalene and some derivatives were studied by accurate measurements, metasable analysis collisional activation. A retro Diels‐Alder reaction involving ethylene extrusion is the most characteristic fragmentation process for these compounds.
Abstract Capsinoids exhibit health-promoting properties and are therefore compounds of interest for medical food sciences. They minor present in relatively high concentrations only a few number pepper cultivars. It is desirable to quantify capsinoids provide selected cultivars with capsinoid contents, which can then be employed as health product. Quantifying low from fruit requires precise selective analytical technique such HPLC coupled electrospray ionization - mass spectrometry,...
ADVERTISEMENT RETURN TO ISSUEPREVNoteNEXTUnambiguous Identification of Regioisomeric Tetrathiafulvalenes by Mass Spectrometry: Application to Dihalogeno Derivatives and the First Synthesis 4,4'(5')-DichlorotetrathiafulvaleneRaquel Andreu, María J. Blesa, Javier Garín, Ana López, Jesús Orduna, SavirónView Author Information Departamento de Química Orgánica, ICMA, Universidad Zaragoza-CSIC, E-50009 Zaragoza, SpainCite this: Org. Chem. 1997, 62, 16, 5642–5644Publication Date (Web):August 8,...
Abstract The electron impact ionization mass spectra of 4,5‐bis(alkylthio)‐1,3‐dithiole‐2‐thiones and their 1,2‐dithiole‐3‐thione isomers were studied by accurate measurements linked scans. relative abundance ions formed following the extrusion S 2 , CS or allows an unambiguous isomer differentiation. Isomerization molecular was means metastable ion analysis collision‐induced dissociation. order reactivity analogous to that observed in isomerization under photochemical conditions.