Antonio T Matos | UFMG - The Federal University of Minas Gerais (original) (raw)
Papers by Antonio T Matos
Coffee Science, 2008
RESUMO: Objetivou-se, com a realização deste trabalho, avaliar a eficiência de sistemas de tratam... more RESUMO: Objetivou-se, com a realização deste trabalho, avaliar a eficiência de sistemas de tratamento na remoção de sólidos e material orgânico da água utilizada no processamento de frutos do cafeeiro (ARC), de modo a possibilitar sua recirculação. O sistema de recirculação da ARC foi operado em quatro circuitos: circuito curto, sem peneira (CC-SP), no qual a ARC era recirculada sem nenhum tratamento; circuito curto, com peneira (CC-CP), no qual a ARC passava por uma peneira pressurizada de malha; circuito longo, sem peneira (CL-SP), no qual a ARC passava por um tanque de decantação; e circuito longo, com peneira (CL-CP), no qual a ARC passava pela peneira de malha e depois pelo tanque de decantação. A peneira, incluída ao sistema de tratamento da ARC, apresentou baixa eficiência na remoção de CE, ST, SS, DBO e DQO, não resultando em efeitos significativos na qualidade da água em recirculação. Entretanto, o tanque de decantação foi eficiente na remoção das variáveis analisadas. O circuito CL-CP apresentou pequeno acréscimo nas eficiências de remoção, quando comparado ao CL-SP, não justificando a inclusão da peneira de malha no processo. Com base nos resultados obtidos, verificou-se que apenas o tanque de decantação é suficiente no tratamento da ARC, para fins de sua recirculação no processamento dos frutos do cafeeiro (Coffea arabica L.).
Intervirology, 1994
An agent pathogenic for laboratory albino Swiss mice was isolated from a pool of Haemaphysalis pu... more An agent pathogenic for laboratory albino Swiss mice was isolated from a pool of Haemaphysalis punctata ticks collected from cattle on a farm located in Alcácer do Sal county, southern Portugal. The isolated virus was shown to be distinct from but serologically related to virus members of the Bhanja antigenic group. This new virus in the family Bunyaviridae was named Palma for the farm where ticks have been collected for several studies.
ChemInform, 2008
MARCALO, J.; SANTOS, M.; LEAL, J. P.; PIRES DE MATOS, A.; TYAGI, R.; MROZIK, M. K.; PITZER, R. M.... more MARCALO, J.; SANTOS, M.; LEAL, J. P.; PIRES DE MATOS, A.; TYAGI, R.; MROZIK, M. K.; PITZER, R. M.; BURSTEN, B. E.; Eur. Phys.
International Journal of Mass Spectrometry and Ion Processes, 1996
The activation of methane and of several small alkanes and alkenes by thorium cations, as studied... more The activation of methane and of several small alkanes and alkenes by thorium cations, as studied by Fourier transform ion cyclotron resonance/mass spectrometry, is described. Thermalized Th+ ions dehydrogenate methane with a rather low efficiency (k/kL = 0.02) to form ThCH2+. Th+ ions react exothermically with the studied alkanes (ethane, propane, n-butane, isobutane and cyclopropane) and alkenes (ethene, propene and
The Journal of Physical Chemistry, 1995
The air-oxidation of the intermetallic compounds LaCuâ, CeCuâ, PrCuâ, and NdCuâ was followed by t... more The air-oxidation of the intermetallic compounds LaCuâ, CeCuâ, PrCuâ, and NdCuâ was followed by thermogravimetry. The mass uptake occurred over a wide range of temperature (423-1100 K), leading to two stoichiometrics according to the lanthanide; CeCuâOâ and LnCuâO{sub 3.5} (Ln = La, Pr, Nd). The characterization by powder X-ray diffraction, scanning electron microscopy/energy dispersive X-ray analysis, and surface area measurements
mBio, 2015
Bacteria are extremely versatile organisms that rapidly adapt to changing environments. When bact... more Bacteria are extremely versatile organisms that rapidly adapt to changing environments. When bacterial cells switch from planktonic growth to biofilm, flagellum formation is turned off and the production of fimbriae and extracellular polysaccharides is switched on. BolA is present in most Gram-negative bacteria, and homologues can be found from proteobacteria to eukaryotes. Here, we show that BolA is a new bacterial transcription factor that modulates the switch from a planktonic to a sessile lifestyle. It negatively modulates flagellar biosynthesis and swimming capacity in Escherichia coli. Furthermore, BolA overexpression favors biofilm formation, involving the production of fimbria-like adhesins and curli. Our results also demonstrate that BolA is a protein with high affinity to DNA and is able to regulate many genes on a genome-wide scale. Moreover, we show that the most significant targets of this protein involve a complex network of genes encoding proteins related to biofilm development. Herein, we propose that BolA is a motile/adhesive transcriptional switch, specifically involved in the transition between the planktonic and the attachment stage of biofilm formation. IMPORTANCE Escherichia coli cells possess several mechanisms to cope with stresses. BolA has been described as a protein important for survival in late stages of bacterial growth and under harsh environmental conditions. BolA-like proteins are widely conserved from prokaryotes to eukaryotes. Although their exact function is not fully established at the molecular level, they seem to be involved in cell proliferation or cell cycle regulation. Here, we unraveled the role of BolA in biofilm development and bacterial motility. Our work suggests that BolA actively contributes to the decision of bacteria to arrest flagellar production and initiate the attachment to form structured communities, such as biofilms. The molecular studies of different lifestyles coupled with the comprehension of the BolA functions may be an important step for future perspectives, with health care and biotechnology applications.
![Research paper thumbnail of Hydrotris(3,5-dimethylpyrazol-1-yl)borate carboxylate complexes of uranium and thorium. X-ray crystal structure of U(O2CCH3)3[HB(3,5-Me2Pz)3]](https://attachments.academia-assets.com/57226597/thumbnails/1.jpg)
](Polyhedron, 1992
The complexes M(O,CR),[HB(3,5Me,P&] (R = CH3 and Ph for M = U" and R = CH, for M = Th") were prod... more The complexes M(O,CR),[HB(3,5Me,P&] (R = CH3 and Ph for M = U" and R = CH, for M = Th") were produced by reactions of MCl,[HB(3,5-Me2Pz),](thf) with three equivalents of NaO#ZR. The compounds MClCp(O~CR)[HB(3,5-Me~Pz)3], obtained by addition of the sodium carboxylates to MCl,CpfHB(3,5-Me,Pz),],
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is ...
Jornal Chemical Society, Dalton Transactions, 2000
Materials Science Forum, 2012
ABSTRACT Metal nanoparticles inside glass present useful properties to photonic applications and ... more ABSTRACT Metal nanoparticles inside glass present useful properties to photonic applications and have been object of several research works. In particular, laser beams have shown their potential in its creation and both ultraviolet beams with nanosecond pulses, and near-infrared beams with femtosecond pulses, have been used. In this paper, the authors add new possibilities by experimentally demonstrating that it is possible to achieve the same results by using near-infrared laser beams and nanosecond pulses. Copper and gold nanoparticles are created in silica-doped glass using nanosecond laser pulses in the near-infrared. Recorded absorption spectra of the glass samples before, and after laser irradiation and further annealing allowed measuring absorption peaks located at 537 mu for copper and 563 nm for gold, which are in accordance with the expected values. Based on Mie theory and using the full-width half maximum for those peaks, the average particle radii of the embedded nanoparticles was estimated to be about 7 nm for copper and 3 nm for gold nanoparticles, respectively.
EMC 2008 14th European Microscopy Congress 1–5 September 2008, Aachen, Germany, 2008
Lizard erythrocytic viruses (LEVs) were previously found with high prevalence in mountain areas o... more Lizard erythrocytic viruses (LEVs) were previously found with high prevalence in mountain areas of Portugal in three different species of lizards. Similar viruses are known to infect other reptiles, amphibians and fish [1]. A previous attempt to adapt these viruses to cell ...
Microscopy and Microanalysis, 2014
![Research paper thumbnail of Bis[hydrotris(pyrazolyl)borate] thorium(IV) complexes: Synthesis and characterization of alkyl, thiolate, alkoxide and aryloxide derivatives and the x-ray crystal structure of Th(HBPz3)2(OPh)2](https://attachments.academia-assets.com/57226595/thumbnails/1.jpg)
](Polyhedron, 1992
A. DOMINGOS et al. in uacuo. The reactions of Th(HBPz&Cl, with LiCHzSiMe3 were carried out at -78... more A. DOMINGOS et al. in uacuo. The reactions of Th(HBPz&Cl, with LiCHzSiMe3 were carried out at -78°C for 2 h and the work-up of the white products involved evaporation of the solutions to dryness, extraction with pentane (ca 10 cm3), separation of the LiCl by centrifugation and evaporation of the supernatants to dryness in VUCUO. Yields for the various reactions were in the range 55-80%. Crystals of the complex Th(HBPz3)2(OPh)2, suitable for X-ray diffraction analysis, were obtained by slow diffusion of pentane into a saturated solution of the complex in THF.
Journal of Hazardous Materials, 2015
Recently, the scientific community became aware of the potential ability of nanoparticles to caus... more Recently, the scientific community became aware of the potential ability of nanoparticles to cause toxicity in living organisms. Therefore, many of the implications for aquatic ecosystems and its effects on living organisms are still to be evaluated and fully understood. In this study, the toxicity of nanodiamonds (NDs) was assessed in the freshwater bivalve (Corbicula fluminea) following exposure to different nominal concentrations of NDs (0.01, 0.1, 1, and 10mgl(-1)) throughout 14 days. The NDs were characterized (gravimetry, pH, zeta potential, electron microscopy, and atomic force microscopy) confirming manufacturer information and showing NDs with a size of 4-6nm. Oxidative stress enzymes activities (glutathione-S-transferase, catalase) and lipid peroxidation were determined. The results show a trend to increase in GST activities after seven days of exposure in bivalves exposed to NDs concentrations (>0.1mgl(-1)), while for catalase a significant increase was found in bivalves exposed from 0.01 to 1.0mgl(-1) following an exposure of 14 days. The histological analysis revealed alterations in digestive gland cells, such as vacuolization and thickening. The lipid peroxidation showed a trend to increase for the different tested NDs concentrations which is compatible with the observed cellular damage.
Virus Genes, 2013
We describe the isolation and characterization of an insect-specific flavivirus (ISF) from Ochler... more We describe the isolation and characterization of an insect-specific flavivirus (ISF) from Ochlerotatus caspius (Pallas, 1771) mosquitoes collected in southern Portugal. The RNA genome of this virus, tentatively designated OCFVPT, for O. caspius flavivirus from Portugal, encodes a polyprotein showing all the features expected for a flavivirus. As frequently observed for ISF, the viral genomes seems to encode a putative Fairly Interesting Flavivirus ORF (FIFO)-like product, the synthesis of which would occur as a result of a -1 translation frameshift event. OCFVPT was isolated in the C6/36 Stegomyia albopicta (= Aedes albopictus) cell line where it replicates rapidly, but failed to replicate in Vero cells in common with other ISFs. Unlike some of the latter, however, the OCFVPT genome does not seem to be integrated in the mosquito cells we tested. Phylogenetic analyses based on partial ISF NS5 nucleotide sequences placed OCFVPT among recently published viral strains documented from mosquitoes collected in the Iberian Peninsula, while analyses of ORF/E/NS3/or NS5 amino acid sequences cluster OCFVPT with HANKV (Hanko virus), an ISF recently isolated from O. caspius mosquitoes collected in Finland. Taking into account the genetic relatedness with this virus, OCFVPT is not expected to be overtly cytopathic to C6/36 cells. The cytopathic effects associated with its presence in culture supernatants are postulated to be the result of the replication of a co-isolated putative new Negev-like virus.
Thermochimica Acta, 2004
In our laboratories we have been studying the synthesis and reactivity of binary actinide and lan... more In our laboratories we have been studying the synthesis and reactivity of binary actinide and lanthanide intermetallic compounds. In this work, the air-oxidation of ThCu 2 and AnNi 2 (An = Th, U) was followed by thermogravimetry (TG) and the products were characterized by X-ray powder diffraction (XRD). The heterobimetallic oxides obtained are described by the formulas 2MO·ThO 2 (M = Cu, Ni) and 2NiO·UO 3 . The thermogravimetric analysis under hydrogen of these heterobimetallic oxides show one mass loss for 2MO·ThO 2 and two mass losses for 2NiO·UO 3 over a wide range of temperature (293-1273 K). The characterization by XRD shows that the reduction products are 2M·ThO 2 (M = Cu, Ni) and 2Ni·UO 2 , with all the actinides in the 4+ oxidation state. The actinide heterobimetallic oxides were described as copper or nickel supported catalysts.
The Journal of Physical Chemistry A, 2006
The Journal of Physical Chemistry A, 2002
The first gas-phase ion chemistry studies of the transuranium actinides Np and Pu by Fourier Tran... more The first gas-phase ion chemistry studies of the transuranium actinides Np and Pu by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR-MS) have been performed. Reactions of An + and AnO + (An = Th, U, Np, and Pu) with N 2 O, C 2 H 4 O (ethylene oxide), H 2 O, ...
![Research paper thumbnail of Europium(II) and ytterbium(II) aryloxide chemistry: synthesis and crystal structure of [Eu(OC6H3But2-2,6)2(THF)3]·0.75C7H8 and [Yb(OC6H3But2-2,6)2(NCMe)4]](https://attachments.academia-assets.com/57226594/thumbnails/1.jpg)
](Polyhedron, 2003
The reactions of europium and ytterbium with 2,6-di-tert -butylphenol were studied by the metal v... more The reactions of europium and ytterbium with 2,6-di-tert -butylphenol were studied by the metal vapour synthesis technique and by dissolution in liquid ammonia. The lanthanide complexes [Eu(OC 6 H 3 Bu t 2 -2,6) 2 (THF) 3 ] ×/0.75C 7 H 8 1 and [Yb(OC 6 H 3 Bu t 2 -2,6) 2 (NCMe) 4 ] 2 were synthesized and characterized by X-ray diffraction studies. #
Coffee Science, 2008
RESUMO: Objetivou-se, com a realização deste trabalho, avaliar a eficiência de sistemas de tratam... more RESUMO: Objetivou-se, com a realização deste trabalho, avaliar a eficiência de sistemas de tratamento na remoção de sólidos e material orgânico da água utilizada no processamento de frutos do cafeeiro (ARC), de modo a possibilitar sua recirculação. O sistema de recirculação da ARC foi operado em quatro circuitos: circuito curto, sem peneira (CC-SP), no qual a ARC era recirculada sem nenhum tratamento; circuito curto, com peneira (CC-CP), no qual a ARC passava por uma peneira pressurizada de malha; circuito longo, sem peneira (CL-SP), no qual a ARC passava por um tanque de decantação; e circuito longo, com peneira (CL-CP), no qual a ARC passava pela peneira de malha e depois pelo tanque de decantação. A peneira, incluída ao sistema de tratamento da ARC, apresentou baixa eficiência na remoção de CE, ST, SS, DBO e DQO, não resultando em efeitos significativos na qualidade da água em recirculação. Entretanto, o tanque de decantação foi eficiente na remoção das variáveis analisadas. O circuito CL-CP apresentou pequeno acréscimo nas eficiências de remoção, quando comparado ao CL-SP, não justificando a inclusão da peneira de malha no processo. Com base nos resultados obtidos, verificou-se que apenas o tanque de decantação é suficiente no tratamento da ARC, para fins de sua recirculação no processamento dos frutos do cafeeiro (Coffea arabica L.).
Intervirology, 1994
An agent pathogenic for laboratory albino Swiss mice was isolated from a pool of Haemaphysalis pu... more An agent pathogenic for laboratory albino Swiss mice was isolated from a pool of Haemaphysalis punctata ticks collected from cattle on a farm located in Alcácer do Sal county, southern Portugal. The isolated virus was shown to be distinct from but serologically related to virus members of the Bhanja antigenic group. This new virus in the family Bunyaviridae was named Palma for the farm where ticks have been collected for several studies.
ChemInform, 2008
MARCALO, J.; SANTOS, M.; LEAL, J. P.; PIRES DE MATOS, A.; TYAGI, R.; MROZIK, M. K.; PITZER, R. M.... more MARCALO, J.; SANTOS, M.; LEAL, J. P.; PIRES DE MATOS, A.; TYAGI, R.; MROZIK, M. K.; PITZER, R. M.; BURSTEN, B. E.; Eur. Phys.
International Journal of Mass Spectrometry and Ion Processes, 1996
The activation of methane and of several small alkanes and alkenes by thorium cations, as studied... more The activation of methane and of several small alkanes and alkenes by thorium cations, as studied by Fourier transform ion cyclotron resonance/mass spectrometry, is described. Thermalized Th+ ions dehydrogenate methane with a rather low efficiency (k/kL = 0.02) to form ThCH2+. Th+ ions react exothermically with the studied alkanes (ethane, propane, n-butane, isobutane and cyclopropane) and alkenes (ethene, propene and
The Journal of Physical Chemistry, 1995
The air-oxidation of the intermetallic compounds LaCuâ, CeCuâ, PrCuâ, and NdCuâ was followed by t... more The air-oxidation of the intermetallic compounds LaCuâ, CeCuâ, PrCuâ, and NdCuâ was followed by thermogravimetry. The mass uptake occurred over a wide range of temperature (423-1100 K), leading to two stoichiometrics according to the lanthanide; CeCuâOâ and LnCuâO{sub 3.5} (Ln = La, Pr, Nd). The characterization by powder X-ray diffraction, scanning electron microscopy/energy dispersive X-ray analysis, and surface area measurements
mBio, 2015
Bacteria are extremely versatile organisms that rapidly adapt to changing environments. When bact... more Bacteria are extremely versatile organisms that rapidly adapt to changing environments. When bacterial cells switch from planktonic growth to biofilm, flagellum formation is turned off and the production of fimbriae and extracellular polysaccharides is switched on. BolA is present in most Gram-negative bacteria, and homologues can be found from proteobacteria to eukaryotes. Here, we show that BolA is a new bacterial transcription factor that modulates the switch from a planktonic to a sessile lifestyle. It negatively modulates flagellar biosynthesis and swimming capacity in Escherichia coli. Furthermore, BolA overexpression favors biofilm formation, involving the production of fimbria-like adhesins and curli. Our results also demonstrate that BolA is a protein with high affinity to DNA and is able to regulate many genes on a genome-wide scale. Moreover, we show that the most significant targets of this protein involve a complex network of genes encoding proteins related to biofilm development. Herein, we propose that BolA is a motile/adhesive transcriptional switch, specifically involved in the transition between the planktonic and the attachment stage of biofilm formation. IMPORTANCE Escherichia coli cells possess several mechanisms to cope with stresses. BolA has been described as a protein important for survival in late stages of bacterial growth and under harsh environmental conditions. BolA-like proteins are widely conserved from prokaryotes to eukaryotes. Although their exact function is not fully established at the molecular level, they seem to be involved in cell proliferation or cell cycle regulation. Here, we unraveled the role of BolA in biofilm development and bacterial motility. Our work suggests that BolA actively contributes to the decision of bacteria to arrest flagellar production and initiate the attachment to form structured communities, such as biofilms. The molecular studies of different lifestyles coupled with the comprehension of the BolA functions may be an important step for future perspectives, with health care and biotechnology applications.
Polyhedron, 1992
The complexes M(O,CR),[HB(3,5Me,P&] (R = CH3 and Ph for M = U" and R = CH, for M = Th") were prod... more The complexes M(O,CR),[HB(3,5Me,P&] (R = CH3 and Ph for M = U" and R = CH, for M = Th") were produced by reactions of MCl,[HB(3,5-Me2Pz),](thf) with three equivalents of NaO#ZR. The compounds MClCp(O~CR)[HB(3,5-Me~Pz)3], obtained by addition of the sodium carboxylates to MCl,CpfHB(3,5-Me,Pz),],
ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was e... more ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is ...
Jornal Chemical Society, Dalton Transactions, 2000
Materials Science Forum, 2012
ABSTRACT Metal nanoparticles inside glass present useful properties to photonic applications and ... more ABSTRACT Metal nanoparticles inside glass present useful properties to photonic applications and have been object of several research works. In particular, laser beams have shown their potential in its creation and both ultraviolet beams with nanosecond pulses, and near-infrared beams with femtosecond pulses, have been used. In this paper, the authors add new possibilities by experimentally demonstrating that it is possible to achieve the same results by using near-infrared laser beams and nanosecond pulses. Copper and gold nanoparticles are created in silica-doped glass using nanosecond laser pulses in the near-infrared. Recorded absorption spectra of the glass samples before, and after laser irradiation and further annealing allowed measuring absorption peaks located at 537 mu for copper and 563 nm for gold, which are in accordance with the expected values. Based on Mie theory and using the full-width half maximum for those peaks, the average particle radii of the embedded nanoparticles was estimated to be about 7 nm for copper and 3 nm for gold nanoparticles, respectively.
EMC 2008 14th European Microscopy Congress 1–5 September 2008, Aachen, Germany, 2008
Lizard erythrocytic viruses (LEVs) were previously found with high prevalence in mountain areas o... more Lizard erythrocytic viruses (LEVs) were previously found with high prevalence in mountain areas of Portugal in three different species of lizards. Similar viruses are known to infect other reptiles, amphibians and fish [1]. A previous attempt to adapt these viruses to cell ...
Microscopy and Microanalysis, 2014
Polyhedron, 1992
A. DOMINGOS et al. in uacuo. The reactions of Th(HBPz&Cl, with LiCHzSiMe3 were carried out at -78... more A. DOMINGOS et al. in uacuo. The reactions of Th(HBPz&Cl, with LiCHzSiMe3 were carried out at -78°C for 2 h and the work-up of the white products involved evaporation of the solutions to dryness, extraction with pentane (ca 10 cm3), separation of the LiCl by centrifugation and evaporation of the supernatants to dryness in VUCUO. Yields for the various reactions were in the range 55-80%. Crystals of the complex Th(HBPz3)2(OPh)2, suitable for X-ray diffraction analysis, were obtained by slow diffusion of pentane into a saturated solution of the complex in THF.
Journal of Hazardous Materials, 2015
Recently, the scientific community became aware of the potential ability of nanoparticles to caus... more Recently, the scientific community became aware of the potential ability of nanoparticles to cause toxicity in living organisms. Therefore, many of the implications for aquatic ecosystems and its effects on living organisms are still to be evaluated and fully understood. In this study, the toxicity of nanodiamonds (NDs) was assessed in the freshwater bivalve (Corbicula fluminea) following exposure to different nominal concentrations of NDs (0.01, 0.1, 1, and 10mgl(-1)) throughout 14 days. The NDs were characterized (gravimetry, pH, zeta potential, electron microscopy, and atomic force microscopy) confirming manufacturer information and showing NDs with a size of 4-6nm. Oxidative stress enzymes activities (glutathione-S-transferase, catalase) and lipid peroxidation were determined. The results show a trend to increase in GST activities after seven days of exposure in bivalves exposed to NDs concentrations (>0.1mgl(-1)), while for catalase a significant increase was found in bivalves exposed from 0.01 to 1.0mgl(-1) following an exposure of 14 days. The histological analysis revealed alterations in digestive gland cells, such as vacuolization and thickening. The lipid peroxidation showed a trend to increase for the different tested NDs concentrations which is compatible with the observed cellular damage.
Virus Genes, 2013
We describe the isolation and characterization of an insect-specific flavivirus (ISF) from Ochler... more We describe the isolation and characterization of an insect-specific flavivirus (ISF) from Ochlerotatus caspius (Pallas, 1771) mosquitoes collected in southern Portugal. The RNA genome of this virus, tentatively designated OCFVPT, for O. caspius flavivirus from Portugal, encodes a polyprotein showing all the features expected for a flavivirus. As frequently observed for ISF, the viral genomes seems to encode a putative Fairly Interesting Flavivirus ORF (FIFO)-like product, the synthesis of which would occur as a result of a -1 translation frameshift event. OCFVPT was isolated in the C6/36 Stegomyia albopicta (= Aedes albopictus) cell line where it replicates rapidly, but failed to replicate in Vero cells in common with other ISFs. Unlike some of the latter, however, the OCFVPT genome does not seem to be integrated in the mosquito cells we tested. Phylogenetic analyses based on partial ISF NS5 nucleotide sequences placed OCFVPT among recently published viral strains documented from mosquitoes collected in the Iberian Peninsula, while analyses of ORF/E/NS3/or NS5 amino acid sequences cluster OCFVPT with HANKV (Hanko virus), an ISF recently isolated from O. caspius mosquitoes collected in Finland. Taking into account the genetic relatedness with this virus, OCFVPT is not expected to be overtly cytopathic to C6/36 cells. The cytopathic effects associated with its presence in culture supernatants are postulated to be the result of the replication of a co-isolated putative new Negev-like virus.
Thermochimica Acta, 2004
In our laboratories we have been studying the synthesis and reactivity of binary actinide and lan... more In our laboratories we have been studying the synthesis and reactivity of binary actinide and lanthanide intermetallic compounds. In this work, the air-oxidation of ThCu 2 and AnNi 2 (An = Th, U) was followed by thermogravimetry (TG) and the products were characterized by X-ray powder diffraction (XRD). The heterobimetallic oxides obtained are described by the formulas 2MO·ThO 2 (M = Cu, Ni) and 2NiO·UO 3 . The thermogravimetric analysis under hydrogen of these heterobimetallic oxides show one mass loss for 2MO·ThO 2 and two mass losses for 2NiO·UO 3 over a wide range of temperature (293-1273 K). The characterization by XRD shows that the reduction products are 2M·ThO 2 (M = Cu, Ni) and 2Ni·UO 2 , with all the actinides in the 4+ oxidation state. The actinide heterobimetallic oxides were described as copper or nickel supported catalysts.
The Journal of Physical Chemistry A, 2006
The Journal of Physical Chemistry A, 2002
The first gas-phase ion chemistry studies of the transuranium actinides Np and Pu by Fourier Tran... more The first gas-phase ion chemistry studies of the transuranium actinides Np and Pu by Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FTICR-MS) have been performed. Reactions of An + and AnO + (An = Th, U, Np, and Pu) with N 2 O, C 2 H 4 O (ethylene oxide), H 2 O, ...
Polyhedron, 2003
The reactions of europium and ytterbium with 2,6-di-tert -butylphenol were studied by the metal v... more The reactions of europium and ytterbium with 2,6-di-tert -butylphenol were studied by the metal vapour synthesis technique and by dissolution in liquid ammonia. The lanthanide complexes [Eu(OC 6 H 3 Bu t 2 -2,6) 2 (THF) 3 ] ×/0.75C 7 H 8 1 and [Yb(OC 6 H 3 Bu t 2 -2,6) 2 (NCMe) 4 ] 2 were synthesized and characterized by X-ray diffraction studies. #