Search results for: Mercedes Gallego

Items from 1 to 20 out of 78 results

article

Suicidal ideation among people with Parkinson's disease and comparison with a control group

Diego Santos‐García, Teresa Deus Fonticoba, Carlos Cores Bartolomé, Maria J. Feal Panceiras, more

International Journal of Geriatric Psychiatry > 38 > 5 > n/a - n/a

Background Detection of suicidal ideation (SI) is key for trying to prevent suicide. The aim of this study was to analyze the frequency of SI and related factors in Spanish people with Parkinson's Disease (PwPD) and to compare them with a control group. Methods PD patients and controls recruited from the Spanish cohort COPPADIS from January 2016 to November 2017 were included. Two visits were conducted:...

article

Non‐motor symptom burden is strongly correlated to motor complications in patients with Parkinson’s disease

D. Santos‐García, T. Deus Fonticoba, E. Suárez Castro, A. Aneiros Díaz, more

European Journal of Neurology > 27 > 7 > 1210 - 1223

Background and purpose The objective of this study was to analyze the relationship between motor complications and non‐motor symptom (NMS) burden in a population of patients with Parkinson’s disease (PD) and also in a subgroup of patients with early PD. Methods Patients with PD from the COPPADIS cohort were included in this cross‐sectional study. NMS burden was defined according to the Non‐Motor...

article

Association Between Personality Traits and Onabotulinumtoxin A Response in Patients With Chronic Migraine

Alicia Gonzalez‐Martinez, Eva Rodríguez Vázquez, Henar Red Gallego, David García‐Azorín, more

Headache: The Journal of Head and Face Pain > 60 > 1 > 153 - 161

Objective The aim of this study was to analyze the potential association between personality traits and onabotulinumtoxin A (onabotA) response in patients with chronic migraine (CM). Background Previous studies from a categorial perspective show that patients with CM have anxious or obsessive personality according to the Salamanca screening test. However, the influence of personality traits in...

article

Quantitative analysis of aldehydes in canned vegetables using static headspace–gas chromatography–mass spectrometry

María Serrano, Mercedes Gallego, Manuel Silva

Journal of Chromatography A > 2017 > 1524 > C > 21-28

Volatile aldehydes appear in canned vegetables as constituents and some of them can also be present as disinfection by-products (DBPs) because of the contact between vegetables and treated water. This paper describes two static headspace–gas chromatography–mass spectrometry (SHS–GC–MS) methods to determine 15 aldehydes in both the solid and the liquid phases of canned vegetables. The treatment for...

article

Simultaneous determination of 14 disinfection by-products in meat products using microwave-assisted extraction and static headspace coupled to gas chromatography–mass spectrometry

Maria Jose Cardador, Mercedes Gallego

Journal of Chromatography A > 2017 > 1509 > C > 9-15

This paper described the first analytical method to simultaneously determine 14 disinfection by-products (DBPs) in meat products using microwave-assisted extraction (MAE) and static headspace (SHS) followed by gas chromatography–mass spectrometry (GC–MS). The DBPs included were 4 trihalomethanes, 7 haloacetic acids, 2 haloacetonitriles and trichloronitromethane, which are commonly formed as a consequence...

article

Detection of regulated disinfection by-products in cheeses

Maria Jose Cardador, Mercedes Gallego, Lourdes Cabezas, Jose Fernández-Salguero

Food Chemistry > 2016 > 204 > C > 306-313

Cheese can contain regulated disinfection by-products (DBPs), mainly through contact with brine solutions prepared in disinfected water or sanitisers used to clean all contact surfaces, such as processing equipment and tanks. This study has focused on the possible presence of up to 10 trihalomethanes (THMs) and 13 haloacetic acids (HAAs) in a wide range of European cheeses. The study shows that 2...

article

Static headspace–gas chromatography–mass spectrometry for the simultaneous determination of trihalomethanes and haloacetic acids in canned vegetables

Maria Jose Cardador, Mercedes Gallego

Journal of Chromatography A > 2016 > 1454 > C > 9-14

Canned vegetables appear to be a possible exposure pathway for hazardous disinfection by-products due to the use of sanitizers and treated water by the canning industry in the preparation of these foods. This work reports on two static headspace–gas chromatography–mass spectrometry methods for the simultaneous determination of 10 trihalomethanes (THMs) and 13 haloacetic acids (HAAs) in both solid...

article

Origin of haloacetic acids in milk and dairy products

Maria Jose Cardador, Mercedes Gallego

Food Chemistry > 2016 > 196 > C > 750-756

Haloacetic acids (HAAs) are formed during the process of water disinfection. Therefore their presence in foods can be correlated with the addition of or contact with treated water. To determine the origin of HAAs in milk and dairy products, firstly a chromatographic method was developed for their determination. The sample treatment involves deproteination of milk followed by derivatization/extraction...

article

Analysis of endogenous aldehydes in human urine by static headspace gas chromatography–mass spectrometry

María Serrano, Mercedes Gallego, Manuel Silva

Journal of Chromatography A > 2016 > 1437 > C > 241-246

Endogenous aldehydes (EAs) generated during oxidative stress and cell processes are associated with many pathogenic and toxicogenic processes. The aim of this research was to develop a solvent-free and automated analytical method for the determination of EAs in human urine using a static headspace generator sampler coupled with gas chromatography–mass spectrometry (HS–GC–MS). Twelve significant EAs...

article

1-Butyl-3-aminopropyl imidazolium—functionalized graphene oxide as a nanoadsorbent for the simultaneous extraction of steroids and β-blockers via dispersive solid–phase microextraction

Maria Serrano, Theodoros Chatzimitakos, Mercedes Gallego, Constantine D. Stalikas

Journal of Chromatography A > 2016 > 1436 > C > 9-18

In this study, we describe the synthesis of graphene oxide functionalized with the ionic liquid 1-butyl-3-aminopropyl imidazolium chloride and its use as an adsorbent for the dispersive solid–phase microextraction (micro SPE) of four anabolic steroids and six β-blockers from aqueous samples of environmental importance, prior to their HPLC-diode array detector analysis. As the ionic liquid is covalently...

article

Simultaneous quantification of trihalomethanes and haloacetic acids in cheese by on-line static headspace gas chromatography–mass spectrometry

Maria Jose Cardador, Jose Fernández-Salguero, Mercedes Gallego

Journal of Chromatography A > 2015 > 1408 > Complete > 22-29

Trihalomethanes (THMs) and haloacetic acids (HAAs) are the two most prevalent classes of disinfection by-products (DBPs) that are present in treated water. Four THMs and six HAAs are regulated by several countries in drinking waters but no regulation for these DBPs has been established in foods. THMs are volatile species that can easily be determined by static headspace (SHS)-GC–MS, but HAAs require...

article

Determination of 14 haloketones in treated water using solid–phase microextraction and gas chromatography–mass spectrometry

Maria Serrano, Manuel Silva, Mercedes Gallego

Journal of Chromatography A > 2015 > 1407 > Complete > 208-215

Haloketones (HKs) are unregulated volatile disinfection by-products that show some potential risk even at low concentrations. While EPA Method 551.1 involves conventional liquid–liquid extraction and a complex series of steps, the simple scientific principles of solid–phase microextraction (SPME) in the headspace (HS) mode can be applied to ensure a solvent-free method to control these substances...

article

Seasonal evaluation of the presence of 46 disinfection by-products throughout a drinking water treatment plant

Maria Serrano, Isabel Montesinos, M.J. Cardador, Manuel Silva, more

Science of the Total Environment > 2015 > 517 > Complete > 246-258

In this work, we studied a total of 46 regulated and non-regulated disinfection by-products (DBPs) including 10 trihalomethanes (THMs), 13 haloacetic acids (HAAs), 6 halonitromethanes (HNMs), 6 haloacetonitriles (HANs) and 11 aldehydes at different points in a drinking water treatment plant (DWTP) and its distribution network. Determining an increased number of compounds and using accurate, sensitive...

article

Haloacetic acids content of fruit juices and soft drinks

María José Cardador, Mercedes Gallego

Food Chemistry > 2015 > 173 > Complete > 685-693

Water used in a food factory is frequently disinfected with chlorine, which originates disinfection by-products: haloacetic acids (HAAs) make up the second most prevalent class of these products. In this paper we propose the first static HS–GC–MS method developed for direct HAA determination in beverages; the method has higher sensitivity, simplicity and reliability than the only alternative available...

article

Graphene‐coated cotton fibers as a sorbent for the extraction of multiclass pesticide residues from water and their determination by gas chromatography with mass spectrometry

Isabel Montesinos, Afroditi Sfakianaki, Mercedes Gallego, Constantine D Stalikas

Journal of Separation Science > 38 > 5 > 836 - 843

A straightforward functionalization procedure is proposed for synthesizing a cotton‐supported graphene as an extraction material, which is effectively employed for the extraction of multiclass pesticides from environmental waters prior to their determination by gas chromatography with mass spectrometry. Different experimental parameters that affect the extraction efficiency, including pH of the extraction,...

article

Analytical method for biomonitoring of perfluoroalkyl acids in human urine

Beatriz Jurado-Sánchez, Evaristo Ballesteros, Mercedes Gallego

Talanta > 2014 > 128 > Complete > 141-146

Perfluoroalkyl acids are an important class of synthetic compounds widely used in commercial and residential settings, which may have potential adverse health effects. The objective of this study was to monitor 6 perfluorocarboxylic acids and perfluorooctane sulphonate in human urine to obtain a way to asses exposure. The target analytes were extracted from urine by using a semi automated solid-phase...

article

Fast and “green” method for the analytical monitoring of haloketones in treated water

María Serrano, Manuel Silva, Mercedes Gallego

Journal of Chromatography A > 2014 > 1358 > Complete > 232-239

Several groups of organic compounds have emerged as being particularly relevant as environmental pollutants, including disinfection by-products (DBPs). Haloketones (HKs), which belong to the unregulated volatile fraction of DBPs, have become a priority because of their occurrence in drinking water at concentrations below 1μg/L. The absence of a comprehensive method for HKs has led to the development...

article

Eco-friendly microextraction method for the quantitative speciation of 13 haloacetic acids in water

María José Cardador, Mercedes Gallego

Journal of Chromatography A > 2014 > 1340 > Complete > 15-23

This paper describes the first micro liquid–liquid extraction (MLLE) gas chromatography–mass spectrometry (GC–MS) method for the speciation of emerging iodinated acetic acids, along with conventional chlorinated and brominated acids in water. The haloacetic acids (HAAs) were derivatised using 3 reagents for their methylation, both in aqueous and organic media. The acidic methanol derivatisation in...

article

Cotton-supported graphene functionalized with aminosilica nanoparticles as a versatile high-performance extraction sorbent for trace organic analysis

Maria Jose Cardador, Efthymia Paparizou, Mercedes Gallego, Constantine Stalikas

Journal of Chromatography A > 2014 > 1336 > Complete > 43-51

Cotton fibers were functionalized, following the coating of fibers with graphene oxide (GO), the covalent attachment of aminosilica nanoparticles and the reduction to the cotton-GR-aminosilica material. Employing the cotton-supported graphene (GR)-aminosilica material, a novel and easily applicable extraction mode was put forward. Several groups of analytes were employed such as PAHs, phthalates,...

article

Transformation of Tributyltin in Zebrafish Eleutheroembryos (Danio rerio)

Aline Rocha Borges, Ana López-Serrano Oliver, Mercedes Gallego-Gallegos, Riansares Muñoz-Olivas, more

Biological Trace Element Research > 2014 > 162 > 1-3 > 317-323

Organotin compounds are highly versatile group of organometallic chemicals used in industrial and agricultural applications. Their endocrine-disrupting effects are well known and their extensive uses as biocide materials, e.g., in antifouling paints, for many years have led to serious environmental problems. So far, attention has mainly been given to tributyltin pollution in water, sediments, and...

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INFONA - science communication portal

Search results for: Mercedes Gallego

Suicidal ideation among people with Parkinson's disease and comparison with a control group

Non‐motor symptom burden is strongly correlated to motor complications in patients with Parkinson’s disease

Association Between Personality Traits and Onabotulinumtoxin A Response in Patients With Chronic Migraine

Quantitative analysis of aldehydes in canned vegetables using static headspace–gas chromatography–mass spectrometry

Simultaneous determination of 14 disinfection by-products in meat products using microwave-assisted extraction and static headspace coupled to gas chromatography–mass spectrometry

Detection of regulated disinfection by-products in cheeses

Static headspace–gas chromatography–mass spectrometry for the simultaneous determination of trihalomethanes and haloacetic acids in canned vegetables

Origin of haloacetic acids in milk and dairy products

Analysis of endogenous aldehydes in human urine by static headspace gas chromatography–mass spectrometry

1-Butyl-3-aminopropyl imidazolium—functionalized graphene oxide as a nanoadsorbent for the simultaneous extraction of steroids and β-blockers via dispersive solid–phase microextraction

Simultaneous quantification of trihalomethanes and haloacetic acids in cheese by on-line static headspace gas chromatography–mass spectrometry

Determination of 14 haloketones in treated water using solid–phase microextraction and gas chromatography–mass spectrometry

Seasonal evaluation of the presence of 46 disinfection by-products throughout a drinking water treatment plant

Haloacetic acids content of fruit juices and soft drinks

Graphene‐coated cotton fibers as a sorbent for the extraction of multiclass pesticide residues from water and their determination by gas chromatography with mass spectrometry

Analytical method for biomonitoring of perfluoroalkyl acids in human urine

Fast and “green” method for the analytical monitoring of haloketones in treated water

Eco-friendly microextraction method for the quantitative speciation of 13 haloacetic acids in water

Cotton-supported graphene functionalized with aminosilica nanoparticles as a versatile high-performance extraction sorbent for trace organic analysis

Transformation of Tributyltin in Zebrafish Eleutheroembryos (Danio rerio)

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