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  1. Article: Shellfish sanitation monitoring in La Spezia gulf: Chemometric evaluation of data from 2015 to 2021.

    Vaccaro, Erica / Ciccotelli, Valentina / Oliveri, Paolo / Battistini, Roberta / Capelli, Cristina / Lottici, Stefano / Melchiorre, Nunzia / Smirnova, Elena / Ferro, Marta / Costa, Erica / Betti, Barbara / Vivaldi, Barbara / Masotti, Chiara / Serracca, Laura / Iacona, Francesco / Orlandi, Mino / Ercolini, Carlo

    Heliyon

    2023  Volume 9, Issue 6, Page(s) e17032

    Abstract: Shellfish sanitary controls are very important to guarantee consumer health because bivalve molluscs (BVM) are filter-feeders so they can accumulate pathogens, environmental contaminants and biotoxins produced by some algae, causing infections and food ... ...

    Abstract Shellfish sanitary controls are very important to guarantee consumer health because bivalve molluscs (BVM) are filter-feeders so they can accumulate pathogens, environmental contaminants and biotoxins produced by some algae, causing infections and food poisoning in humans after ingestion. The purpose of this work was to analyse with chemometric methods the historical data relating to routine analyses carried out by the competent authority (Liguria Local Health Unit, National Health Service) on the BVM reared in a shellfish farm located in the Gulf of La Spezia (Italy). Chemometric analysis was aimed at identifying any correlations between the variables, as well as any seasonal trends and similarities between the stations, in order to be able to provide further material for a more accurate risk assessment and to improve the monitoring organization for example by reducing sampling stations and/or sampling frequency. The dataset used included 31 variables classified as biotoxicological, microbiological and chemical variables, measured twice a week, monthly or half yearly respectively, for a total of 6 years (from 2015 to 2021), on samples of
    Language English
    Publishing date 2023-06-15
    Publishing country England
    Document type Journal Article
    ZDB-ID 2835763-2
    ISSN 2405-8440
    ISSN 2405-8440
    DOI 10.1016/j.heliyon.2023.e17032
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: A General Route for Growing Metal Sulfides onto Graphene Oxide and Exfoliated Graphite Oxide.

    Lopes, Joana L / Estrada, Ana C / Fateixa, Sara / Ferro, Marta / Trindade, Tito

    Nanomaterials (Basel, Switzerland)

    2017  Volume 7, Issue 9

    Abstract: Graphene-based materials are elective materials for a number of technologies due to their unique properties. Also, semiconductor nanocrystals have been extensively explored due to their size-dependent properties that make them useful for several ... ...

    Abstract Graphene-based materials are elective materials for a number of technologies due to their unique properties. Also, semiconductor nanocrystals have been extensively explored due to their size-dependent properties that make them useful for several applications. By coupling both types of materials, new applications are envisaged that explore the synergistic properties in such hybrid nanostructures. This research reports a general wet chemistry method to prepare graphene oxide (GO) sheets decorated with nanophases of semiconductor metal sulfides. This method allows the in situ growth of metal sulfides onto GO by using metal dialkyldithiocarbamate complexes as single-molecule precursors. In particular, the role of GO as heterogeneous substrate for the growth of semiconductor nanocrystals was investigated by using Raman spectroscopic and imaging methods. The method was further extended to other graphene-based materials, which are easily prepared in a larger scale, such as exfoliated graphite oxide (EGO).
    Language English
    Publishing date 2017-08-31
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2662255-5
    ISSN 2079-4991
    ISSN 2079-4991
    DOI 10.3390/nano7090245
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Prospects for Electrical Performance Tuning in Ca

    Constantinescu, Gabriel / Mikhalev, Sergey M / Lisenkov, Aleksey D / Lopes, Daniela V / Sarabando, Artur R / Ferro, Marta C / Silva, Tiago F da / Sergiienko, Sergii A / Kovalevsky, Andrei V

    Materials (Basel, Switzerland)

    2021  Volume 14, Issue 4

    Abstract: This work further explores the possibilities for designing the high-temperature electrical performance of the thermoelectric ... ...

    Abstract This work further explores the possibilities for designing the high-temperature electrical performance of the thermoelectric Ca
    Language English
    Publishing date 2021-02-19
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2487261-1
    ISSN 1996-1944
    ISSN 1996-1944
    DOI 10.3390/ma14040980
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article ; Online: Biochemical and behavioral responses of zebrafish embryos to magnetic graphene/nickel nanocomposites.

    Almeida, Ana Rita / Salimian, Maryam / Ferro, Marta / Marques, Paula Aap / Goncalves, Gil / Titus, Elby / Domingues, Inês

    Ecotoxicology and environmental safety

    2019  Volume 186, Page(s) 109760

    Abstract: Graphene nanocomposites are emerging carbon-based materials with interesting electrical, mechanical, optical and magnetic properties, relevant for applications in different fields. Despite this increased use, the impact of graphene nanocomposites ... ...

    Abstract Graphene nanocomposites are emerging carbon-based materials with interesting electrical, mechanical, optical and magnetic properties, relevant for applications in different fields. Despite this increased use, the impact of graphene nanocomposites residues in the environment has not been properly studied. Thus, the goal of this work was to assess the toxicity of two nickel/graphene nanocomposites (G/Ni1 and G/Ni2) differing in size and shape to Danio rerio embryos. Their toxicity was evaluated using apical (mortality, development and hatching), biochemical [cholinesterase (ChE), glutathione-S-transferase (GST), and catalase (CAT) activities] and behavioral (locomotor activity) endpoints. At the tested concentrations, neither of the nanocomposites presented lethal or developmental effects. Nevertheless, both nanocomposites induced behavioral effects, reducing swimming distances. This effect was, however detected at lower concentrations in the G/Ni1 nanocomposite. At biochemical level, only G/Ni1 nanocomposite showed to interfere with the measured parameters, increasing the activities of ChE, CAT and GST. Differences in the effects induced by the two nanocomposites seem to be related not only with their size, but also with the shape and the ability to continuously release nickel ions to aqueous medium. This work highlights the importance of studying graphene nanocomposites effects to aquatic organisms even when acute toxicity is not expected. The relevance of the effects found in this work need to be further analyzed in light of the consequences to the long-term fitness of the organisms and in light of the environmental concentrations expected for this type of compounds.
    MeSH term(s) Animals ; Embryo, Nonmammalian/drug effects ; Embryo, Nonmammalian/metabolism ; Graphite/toxicity ; Locomotion/drug effects ; Magnetic Phenomena ; Nanocomposites/toxicity ; Nickel/toxicity ; Particle Size ; Swimming ; Water Pollutants, Chemical/toxicity ; Zebrafish
    Chemical Substances Water Pollutants, Chemical ; Graphite (7782-42-5) ; Nickel (7OV03QG267)
    Language English
    Publishing date 2019-10-10
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2019.109760
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  5. Article ; Online: Magnetic nanosorbents with siliceous hybrid shells of alginic acid and carrageenan for removal of ciprofloxacin.

    Soares, Sofia F / Rocha, Maria João / Ferro, Marta / Amorim, Carlos O / Amaral, João S / Trindade, Tito / Daniel-da-Silva, Ana L

    International journal of biological macromolecules

    2019  Volume 139, Page(s) 827–841

    Abstract: Water contamination with antibiotics is a serious environmental threat. Ciprofloxacin (CIP) is one of the most frequently detected antibiotics in water. Herein, silica-based magnetic nanosorbents prepared using three seaweed polysaccharides, alginic acid, ...

    Abstract Water contamination with antibiotics is a serious environmental threat. Ciprofloxacin (CIP) is one of the most frequently detected antibiotics in water. Herein, silica-based magnetic nanosorbents prepared using three seaweed polysaccharides, alginic acid, κ- and λ-carrageenan, were developed and evaluated in the uptake of ciprofloxacin. The sorbents were firstly characterized in detail to assess their morphology and composition. A systematic investigation was conducted to study the adsorption performance towards CIP, by varying the initial pH, contact time and initial CIP concentration. The maximum adsorption capacity was 464, 423 and 1350 mg/g for particles prepared from alginic acid, κ- and λ-carrageenan respectively. These high values indicate that these materials are among the most effective sorbents reported so far for the removal of CIP from water. The kinetic data were consistent with the pseudo-second-order model. The CIP adsorption on λ-carrageenan particles followed a cooperative process with sigmoidal isotherm that was described by the Dubinin-Radushkevich model. The high charge density of λ-carrageenan and the propensity of CIP molecules to self-aggregate may explain the cooperative nature of CIP adsorption. The sorbents were easily regenerated in mild conditions and could be reused in CIP removal up to 4 times without a significant loss of adsorptive properties.
    MeSH term(s) Adsorption ; Alginic Acid/chemistry ; Carrageenan/chemistry ; Ciprofloxacin/chemistry ; Ciprofloxacin/isolation & purification ; Hydrogen-Ion Concentration ; Kinetics ; Magnets/chemistry ; Nanostructures/chemistry ; Silicon/chemistry ; Water Pollutants, Chemical/chemistry ; Water Pollutants, Chemical/isolation & purification ; Water Purification/methods
    Chemical Substances Water Pollutants, Chemical ; Ciprofloxacin (5E8K9I0O4U) ; Alginic Acid (8C3Z4148WZ) ; Carrageenan (9000-07-1) ; Silicon (Z4152N8IUI)
    Language English
    Publishing date 2019-08-05
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2019.08.030
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: Magnetic nanosorbents with siliceous hybrid shells of alginic acid and carrageenan for removal of ciprofloxacin

    Soares, Sofia F / Rocha, Maria João / Ferro, Marta / Amorim, Carlos O / Amaral, João S / Trindade, Tito / Daniel-da-Silva, Ana L

    International journal of biological macromolecules. 2019 Oct. 15, v. 139

    2019  

    Abstract: Water contamination with antibiotics is a serious environmental threat. Ciprofloxacin (CIP) is one of the most frequently detected antibiotics in water. Herein, silica-based magnetic nanosorbents prepared using three seaweed polysaccharides, alginic acid, ...

    Abstract Water contamination with antibiotics is a serious environmental threat. Ciprofloxacin (CIP) is one of the most frequently detected antibiotics in water. Herein, silica-based magnetic nanosorbents prepared using three seaweed polysaccharides, alginic acid, κ- and λ-carrageenan, were developed and evaluated in the uptake of ciprofloxacin. The sorbents were firstly characterized in detail to assess their morphology and composition. A systematic investigation was conducted to study the adsorption performance towards CIP, by varying the initial pH, contact time and initial CIP concentration. The maximum adsorption capacity was 464, 423 and 1350 mg/g for particles prepared from alginic acid, κ- and λ-carrageenan respectively. These high values indicate that these materials are among the most effective sorbents reported so far for the removal of CIP from water. The kinetic data were consistent with the pseudo-second-order model. The CIP adsorption on λ-carrageenan particles followed a cooperative process with sigmoidal isotherm that was described by the Dubinin-Radushkevich model. The high charge density of λ-carrageenan and the propensity of CIP molecules to self-aggregate may explain the cooperative nature of CIP adsorption. The sorbents were easily regenerated in mild conditions and could be reused in CIP removal up to 4 times without a significant loss of adsorptive properties.
    Keywords adsorption ; alginates ; antibiotics ; ciprofloxacin ; lambda-carrageenan ; macroalgae ; magnetism ; models ; pH ; sorbents ; water pollution
    Language English
    Dates of publication 2019-1015
    Size p. 827-841.
    Publishing place Elsevier B.V.
    Document type Article
    ZDB-ID 282732-3
    ISSN 1879-0003 ; 0141-8130
    ISSN (online) 1879-0003
    ISSN 0141-8130
    DOI 10.1016/j.ijbiomac.2019.08.030
    Database NAL-Catalogue (AGRICOLA)

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  7. Article ; Online: Eco-friendly profile of pegylated nano-graphene oxide at different levels of an aquatic trophic chain.

    Loureiro, Susana / Gonçalves, Sandra Filipe / Gonçalves, Gil / Hortiguela, Maria Jesús / Rebelo, Sandra / Ferro, Marta Carmona / Vila, Mercedes

    Ecotoxicology and environmental safety

    2018  Volume 162, Page(s) 192–200

    Abstract: Nanographene oxide (nGO) has been recently proposed as a new antitumoral therapeutic agent, drug delivery carrier and gene transfection vehicle, among others. Treatment is carried out by hyperthermia induced by infrared irradiation. After treatment, the ... ...

    Abstract Nanographene oxide (nGO) has been recently proposed as a new antitumoral therapeutic agent, drug delivery carrier and gene transfection vehicle, among others. Treatment is carried out by hyperthermia induced by infrared irradiation. After treatment, the nanosystems will be inevitably excreted and released to the environment. To understand the potential impacts of pegylated nGO (nGO-PEG), three key species from different trophic levels were used: the green micro-algae Raphidocelis subcapitata (growth inhibition test), the cladocera Daphnia magna (acute and chronic tests), and the fish Danio rerio (fish embryo test). Besides a regular standard procedure to assess toxicity, and considering the mode of action of nGO-PEG in cancer treatment, a simultaneous infrared lamp exposure was carried out for D. magna and D. rerio. Additionally, and taking advantage of the phenotypic transparency of D. magna, nGO-PEG was fluorescently tagged to evaluate the potential uptake of nGO-PEG. The R. subcapitata growth inhibition test showed effects during the first 48 h, recovering till the end of the test (96 h). No acute or chronic effects were observed for D. magna, under standard or infrared light exposures although confocal microscope images showed nGO-PEG uptake. Very small percentages of mortality and abnormalities were observed in D. rerio exposed with and without the infrared lamp. Although low hazard may be expected for nGO-PEG in aquatic ecosystems, further studies with species with different life traits should be accomplished, in order to derive more accurate conclusions.
    MeSH term(s) Animals ; Antineoplastic Agents ; Chlorophyta/drug effects ; Chlorophyta/growth & development ; Daphnia/drug effects ; Drug Delivery Systems ; Embryo, Nonmammalian/drug effects ; Food Chain ; Graphite/chemistry ; Graphite/toxicity ; Oxides/chemistry ; Oxides/toxicity ; Polyethylene Glycols/chemistry ; Polyethylene Glycols/toxicity ; Toxicity Tests/methods ; Water Pollutants, Chemical/toxicity ; Zebrafish/embryology
    Chemical Substances Antineoplastic Agents ; Oxides ; Water Pollutants, Chemical ; Polyethylene Glycols (3WJQ0SDW1A) ; Graphite (7782-42-5)
    Language English
    Publishing date 2018-07-11
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 436536-7
    ISSN 1090-2414 ; 0147-6513
    ISSN (online) 1090-2414
    ISSN 0147-6513
    DOI 10.1016/j.ecoenv.2018.06.078
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  8. Article: Photoluminescent Nanocrystals in a Multicomponent Aluminoborosilicate Glass

    Ruivo, Andreia / Ferro Marta / Andrade Suzana M / Rocha João / Pina Fernando / Laia César A. T

    The Journal of Physical Chemistry C. 2016 Nov. 03, v. 120, no. 43

    2016  

    Abstract: In this study, stable and nonexpensive aluminoborosilicate glasses with different photoluminescence colors were synthesized by doping with Pb(II), Ba(II) and sodium halides. While glasses with NaF and NaCl exhibit no (or very low) luminescence, glasses ... ...

    Abstract In this study, stable and nonexpensive aluminoborosilicate glasses with different photoluminescence colors were synthesized by doping with Pb(II), Ba(II) and sodium halides. While glasses with NaF and NaCl exhibit no (or very low) luminescence, glasses doped with NaBr and NaI display room-temperature photoluminescence at 435 and 530 nm, respectively. The observed room-temperature photoluminescence is attributed to nanocrystals whose presence is revealed by transmission electron microscopy. The crystalline nature of the particles, which are pointed out as barium-lead halides, is also revealed by anisotropy measurements for Br and I doped samples. Time-resolved luminescence measurements show a second-order kinetics component combined with a first-order nonradiative rate constant. The photoluminescence properties here described are important for the future design of new optical materials or devices based on lead halide nanocrystals.
    Keywords ambient temperature ; barium ; bromine ; color ; glass ; iodine ; lead ; nanocrystals ; photoluminescence ; physical chemistry ; sodium bromide ; sodium chloride ; sodium fluoride ; transmission electron microscopy
    Language English
    Dates of publication 2016-1103
    Size p. 24925-24931.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021%2Facs.jpcc.6b04552
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Nanodomains Coupled to Ferroelectric Domains Induced by Lattice Distortion in Self-Doped LuMnxO3±δ Hexagonal Ceramics

    Baghizadeh, A / Vieira JoaquimM / Gonçalves JoãoN / Willinger Marc-Georg / Ferro Marta C / Amaral Vitor S

    The Journal of Physical Chemistry C. 2016 Sept. 29, v. 120, no. 38

    2016  

    Abstract: Self-doped h-LuMnₓO₃±δ multiferroic ceramics with 0.92 ≤ x ≤ 1.12 were studied for the dependence of magnetic properties on x. Interlocking of lattice distortion at the nanoscale with ferroelectric (FE) domains in bulk RMnO₃ materials is mostly unknown. ... ...

    Abstract Self-doped h-LuMnₓO₃±δ multiferroic ceramics with 0.92 ≤ x ≤ 1.12 were studied for the dependence of magnetic properties on x. Interlocking of lattice distortion at the nanoscale with ferroelectric (FE) domains in bulk RMnO₃ materials is mostly unknown. Here we report occurrence of nanodomains in transmission electron microscopy (TEM) images with the presence of antiphase boundaries/ferroelectric domain walls separating nano-FE domains. Observed chemical inhomogeneity across the crystalline grains of the ceramics causes distortion in the lattice. Formation of nanostructural domains revealed across particles of Mn deficient or Lu deficient samples includes bands of strained atomic planes, structural antiphase boundaries, and planar defects similar to stacking fault ribbons. Nanotwins exist in the basal plane, the twin boundary representing disorder of the stacking of atomic planes along the [110] direction. Image contrast in high resolution HRTEM images and TEM image simulation confirm the role of planar defects on switching of electrical polarization, which cause topology breaking of sixfold vortices of FE domains in h-RMnO₃ oxides. The local orbital arrangements of ions are investigated by EELS spectroscopy of O K-edge supported by theoretical analysis. Irreversibility in magnetization below the Néel temperature of antiferromagnetic ordering of the h-LuMnₓO₃±δ multiferroic solid solution is found for all ceramics showing dependence on cation vacancy type and nominal content. The main features observed in the irreversibility of magnetization were correlated to defects and inhomogeneity in the nanoscale images of the lattice of ceramics. The interplay of lattice distortion linked to extended defects and magnetic/ferroelectric properties of multiferroic ceramics is further discussed.
    Keywords cations ; ceramics ; crystals ; ferrimagnetic materials ; magnetic properties ; magnetism ; manganese ; oxides ; physical chemistry ; spectroscopy ; temperature ; topology ; transmission electron microscopy
    Language English
    Dates of publication 2016-0929
    Size p. 21897-21904.
    Publishing place American Chemical Society
    Document type Article
    ISSN 1932-7455
    DOI 10.1021%2Facs.jpcc.6b04478
    Database NAL-Catalogue (AGRICOLA)

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  10. Article: Non-invasive Prenatal Diagnosis of Feto-Maternal Platelet Incompatibility by Cold High Resolution Melting Analysis.

    Ferro, Marta / Macher, Hada C / Noguerol, Pilar / Jimenez-Arriscado, Pilar / Molinero, Patrocinio / Guerrero, Juan M / Rubio, Amalia

    Advances in experimental medicine and biology

    2016  Volume 924, Page(s) 67–70

    Abstract: Fetal and Neonatal alloimmune thrombocytopenia (FNAIT) is a condition which could occur when pregnant women develop an alloimmunization against paternally inherited antigens of the fetal platelets. Approximately 80 % of FNAIT cases are caused by anti-HPA- ...

    Abstract Fetal and Neonatal alloimmune thrombocytopenia (FNAIT) is a condition which could occur when pregnant women develop an alloimmunization against paternally inherited antigens of the fetal platelets. Approximately 80 % of FNAIT cases are caused by anti-HPA-1a, about 15 % by anti-HPA-5b and 5 % by other HPA antibodies. Only 2 % of the total population is HPA-1a negative (HPA-1b1b). The HPA-1a allele differs by one single nucleotide from HPA-1b allele, yet it represents around 27 % of total severe thrombocytopenias. HPA-1 was studied in serum cDNA from 12 volunteer pregnant women to determine their HPA-1 genotype by HRM (high resolution melting) PCR. When an homozygous HPA-1 gene was detected in a mother, a COLD HRM was performed to determine whether or not the fetal genotype differs from the mother's.The differences in the melting curve shapes allow us to accurately distinguish the three pregnants genotypes. The fetal heterozygous genotype of homozygous pregnant women was correctly detected by COLD PCR HRM in maternal serum. HPA-1 genotyping by HRM may be a useful aproach for genotyping all pregnant women in inexpensively. Moreover, when HPA-1 homozygosis was detected in a pregnant woman, fetal heterozygosis may be diagnosed by COLD HRM to select pregnancies for preventive monitoring.
    MeSH term(s) Antigens, Human Platelet/blood ; Antigens, Human Platelet/genetics ; Antigens, Human Platelet/immunology ; Blood Platelets/metabolism ; Cost-Benefit Analysis ; DNA/blood ; DNA/genetics ; Female ; Genotype ; Genotyping Techniques/economics ; Genotyping Techniques/methods ; Humans ; Infant, Newborn ; Maternal-Fetal Exchange/genetics ; Maternal-Fetal Exchange/immunology ; Nucleic Acid Denaturation ; Polymerase Chain Reaction/methods ; Pregnancy ; Prenatal Diagnosis/methods ; Reproducibility of Results ; Sequence Analysis, DNA/methods ; Thrombocytopenia, Neonatal Alloimmune/blood ; Thrombocytopenia, Neonatal Alloimmune/genetics ; Thrombocytopenia, Neonatal Alloimmune/immunology
    Chemical Substances Antigens, Human Platelet ; ITGB3 protein, human ; DNA (9007-49-2)
    Language English
    Publishing date 2016-10-15
    Publishing country United States
    Document type Journal Article
    ISSN 2214-8019 ; 0065-2598
    ISSN (online) 2214-8019
    ISSN 0065-2598
    DOI 10.1007/978-3-319-42044-8_13
    Database MEDical Literature Analysis and Retrieval System OnLINE

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