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  1. AU="Orellana, Guillermo"
  2. AU=Raff Hershel
  3. AU="Cantore, Italo"
  4. AU="Gillespie, Robert L."
  5. AU=Gravell Rachel J AU=Gravell Rachel J
  6. AU=Chung Leon C.
  7. AU="Nishida, Shuhei"
  8. AU="He, Xiaping"
  9. AU=Ellies Maik
  10. AU="Mahmood, Faiza"
  11. AU="C. Korin Bullen"
  12. AU="Heesen, M"
  13. AU="Besson, Naomi R"
  14. AU="Teh, Selina Shiqing K"
  15. AU=Hamilton P J
  16. AU=Rizo Aleksandra
  17. AU="Nicola Sunter"
  18. AU=Dalinka M K
  19. AU="Slim, Marine"
  20. AU=Colby J
  21. AU="Hadid, Abdenour"
  22. AU=Smarr Cory-Ann
  23. AU="Rende, Mario"
  24. AU="Evans, Leigh"
  25. AU=Brown Erwin
  26. AU=Hehlmann R
  27. AU="Azzopardi, Nicolas"
  28. AU="Surić-Mihić Marija"
  29. AU=Cismasiu Valeriu B
  30. AU="Töpfer, Änne"
  31. AU="Lemcke, Johannes"
  32. AU=Cousins Emily
  33. AU="Clarke Aileen"
  34. AU="Aparecido Corrêa, Nivaldo"
  35. AU="Meng-Ju Wang"
  36. AU=Verrills Paul
  37. AU="Chaudhari, Amol"
  38. AU="Planagumà, Jesús"
  39. AU="de Rezende, Grazielli Rocha"
  40. AU="Mohadeseh NEZAM"
  41. AU="Daniel Pecos-Martín"
  42. AU="Gentle, Popular"
  43. AU=Wang Jirui
  44. AU="Bielik, Martin"
  45. AU="Simon A.F. Darroch"
  46. AU="Suzuki, Kenichi G N"
  47. AU="Hu, Yizhong"
  48. AU=Sasaki Kotaro
  49. AU=Abd-Elsayed Alaa
  50. AU="Jung, Hee-Jun"
  51. AU="Struckmann, Stephan"
  52. AU=Coward Richard
  53. AU="Ghazizadeh, Shabnam"
  54. AU="Rebecca A Butcher"
  55. AU="Kimberlyn Roosa"
  56. AU=Chian Ri-Cheng
  57. AU="Alzalzalah, Sayed"
  58. AU=Kaufman Jonathan J
  59. AU="Kim, Jin K"
  60. AU="Zevakov, S A"
  61. AU="Sui Phang"
  62. AU="Kolomeichuk, Lilia V"
  63. AU="Sabuj Kanti Mistry"
  64. AU="Basurto-Lozada, Daniela"
  65. AU="Takashima, Shin-Ichiro"
  66. AU="Teresinha Leal"
  67. AU="Angélique B van 't Wout"
  68. AU="Roberts, Nicholas J"
  69. AU="Chauhan, Gaurav B"
  70. AU=Hanjaya-Putra Donny
  71. AU=Powell James
  72. AU="Russell, Todd"
  73. AU=Forth Scott
  74. AU="Kreutzer, Susanne" AU="Kreutzer, Susanne"
  75. AU="St John, Maie"
  76. AU=Gerhardy A
  77. AU="Qi, Huixin"
  78. AU="Dobosiewicz, May"
  79. AU="Srivastava, Rakesh"
  80. AU="Grevtsov K.I."

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  1. Buch: Frontiers in chemical sensors

    Alonso, Julián / Orellana, Guillermo

    novel principles and techniques

    (Springer series on chemical sensors and biosensors ; 3)

    2005  

    Verfasserangabe vol. ed.: Guillermo Orellana ... With contributions by J. Alonso
    Serientitel Springer series on chemical sensors and biosensors ; 3
    Überordnung
    Schlagwörter Biosensing Techniques / methods ; Optics and Photonics ; Spectrum Analysis ; Chemischer Sensor
    Schlagwörter Chemosensor
    Sprache Englisch
    Umfang XII, 370 S. : Ill., graph. Darst.
    Verlag Springer
    Erscheinungsort Berlin u.a.
    Erscheinungsland Deutschland
    Dokumenttyp Buch
    HBZ-ID HT014516136
    ISBN 978-3-540-27756-9 ; 3-540-27756-0
    Datenquelle Katalog ZB MED Medizin, Gesundheit

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    SignaturLeihstatusStandort
    2008 A 6227 bestellbar zur Ausleihe Magazin

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  2. Artikel ; Online: Overcoming Biochemical Limitations of Galactose Oxidase through the Design of a Solid-Supported Self-Sufficient Biocatalyst.

    Lorente-Arevalo, Alvaro / Orellana, Guillermo / Ladero, Miguel / Bolivar, Juan M

    Chembiochem : a European journal of chemical biology

    2023  Band 24, Heft 24, Seite(n) e202300421

    Abstract: Galactose Oxidase (GalOx) has gained significant interest in biocatalysis due to its ability for selective oxidation beyond the natural oxidation of galactose, enabling the production of valuable derivatives. However, the practical application of GalOx ... ...

    Abstract Galactose Oxidase (GalOx) has gained significant interest in biocatalysis due to its ability for selective oxidation beyond the natural oxidation of galactose, enabling the production of valuable derivatives. However, the practical application of GalOx has been hindered by the limited availability of active and stable biocatalysts, as well as the inherent biochemical limitations such as oxygen (O
    Mesh-Begriff(e) Enzymes, Immobilized/metabolism ; Galactose Oxidase/metabolism ; Galactose ; Sepharose ; Biocatalysis ; Hemeproteins/metabolism ; Oxygen
    Chemische Substanzen Enzymes, Immobilized ; Galactose Oxidase (EC 1.1.3.9) ; Galactose (X2RN3Q8DNE) ; Sepharose (9012-36-6) ; Hemeproteins ; Oxygen (S88TT14065)
    Sprache Englisch
    Erscheinungsdatum 2023-10-24
    Erscheinungsland Germany
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2020469-3
    ISSN 1439-7633 ; 1439-4227
    ISSN (online) 1439-7633
    ISSN 1439-4227
    DOI 10.1002/cbic.202300421
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  3. Artikel: Comparative Genomic Analysis of Novel

    Díaz, Romina / Torres-Miranda, Alexis / Orellana, Guillermo / Garrido, Daniel

    Microorganisms

    2021  Band 9, Heft 9

    Abstract: Bifidobacterium ... ...

    Abstract Bifidobacterium longum
    Sprache Englisch
    Erscheinungsdatum 2021-09-08
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms9091906
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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  4. Artikel ; Online: Simultaneous determination of zearalenone and alternariol mycotoxins in oil samples using mixed molecularly imprinted polymer beads.

    Moya-Cavas, Tamara / Navarro-Villoslada, Fernando / Lucas Urraca, Javier / Antonio Serrano, Luis / Orellana, Guillermo / Cruz Moreno-Bondi, María

    Food chemistry

    2023  Band 412, Seite(n) 135538

    Abstract: This work reports the optimization of a method using Molecularly Imprinted Polymers (MIPs) for the simultaneous determination of zearalenone and alternariol mycotoxins. The method was optimized using a chemometric approach where in the optimized ... ...

    Abstract This work reports the optimization of a method using Molecularly Imprinted Polymers (MIPs) for the simultaneous determination of zearalenone and alternariol mycotoxins. The method was optimized using a chemometric approach where in the optimized conditions, the cartridges with a mixture (50:50, w/w) of both MIPs, were loaded with 30 mL of sample, washed with 2 mL of ACN/water (20/80, v/v) and eluted with 2.5 mL of trifluoroacetic acid/MeOH (3/97, v/v). The extracts were analyzed by HPLC coupled to a fluorescence detector (FLD). The optimized method has been applied and validated to the analysis of the mycotoxins in maize, sunflower and olive oils samples with a limit of detection of 5 and 2 µg kg
    Mesh-Begriff(e) Zearalenone/analysis ; Mycotoxins/analysis ; Molecularly Imprinted Polymers ; Tandem Mass Spectrometry ; Solid Phase Extraction/methods ; Molecular Imprinting/methods ; Chromatography, High Pressure Liquid/methods
    Chemische Substanzen Zearalenone (5W827M159J) ; Mycotoxins ; alternariol (KN9L4260JW) ; Molecularly Imprinted Polymers
    Sprache Englisch
    Erscheinungsdatum 2023-01-21
    Erscheinungsland England
    Dokumenttyp Journal Article
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2023.135538
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Z 3634: Hefte anzeigen

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  5. Artikel: Comparative Genomic Analysis of Novel Bifidobacterium longum subsp. longum Strains Reveals Functional Divergence in the Human Gut Microbiota

    Díaz, Romina / Torres-Miranda, Alexis / Orellana, Guillermo / Garrido, Daniel

    Microorganisms. 2021 Sept. 08, v. 9, no. 9

    2021  

    Abstract: Bifidobacterium longum subsp. longum is a prevalent group in the human gut microbiome. Its persistence in the intestinal microbial community suggests a close host-microbe relationship according to age. The subspecies adaptations are related to metabolic ... ...

    Abstract Bifidobacterium longum subsp. longum is a prevalent group in the human gut microbiome. Its persistence in the intestinal microbial community suggests a close host-microbe relationship according to age. The subspecies adaptations are related to metabolic capabilities and genomic and functional diversity. In this study, 154 genomes from public databases and four new Chilean isolates were genomically compared through an in silico approach to identify genomic divergence in genes associated with carbohydrate consumption and their possible adaptations to different human intestinal niches. The pangenome of the subspecies was open, which correlates with its remarkable ability to colonize several niches. The new genomes homogenously clustered within subspecies longum, as observed in phylogenetic analysis. B. longum SC664 was different at the sequence level but not in its functions. COG analysis revealed that carbohydrate use is variable among longum subspecies. Glycosyl hydrolases participating in human milk oligosaccharide use were found in certain infant and adult genomes. Predictive genomic analysis revealed that B. longum M12 contained an HMO cluster associated with the use of fucosylated HMOs but only endowed with a GH95, being able to grow in 2-fucosyllactose as the sole carbon source. This study identifies novel genomes with distinct adaptations to HMOs and highlights the plasticity of B. longum subsp. longum to colonize the human gut microbiota.
    Schlagwörter Bifidobacterium longum subsp. longum ; adults ; breast milk ; carbon ; computer simulation ; functional diversity ; genomics ; glycosidases ; host-pathogen relationships ; humans ; intestinal microorganisms ; intestines ; microbial communities ; oligosaccharides ; phylogeny
    Sprache Englisch
    Erscheinungsverlauf 2021-0908
    Erscheinungsort Multidisciplinary Digital Publishing Institute
    Dokumenttyp Artikel
    ZDB-ID 2720891-6
    ISSN 2076-2607
    ISSN 2076-2607
    DOI 10.3390/microorganisms9091906
    Datenquelle NAL Katalog (AGRICOLA)

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  6. Artikel ; Online: Simultaneous determination of zearalenone and alternariol mycotoxins in oil samples using mixed molecularly imprinted polymer beads

    Moya-Cavas, Tamara / Navarro-Villoslada, Fernando / Lucas Urraca, Javier / Antonio Serrano, Luis / Orellana, Guillermo / Cruz Moreno-Bondi, María

    Food Chemistry. 2023 June, v. 412 p.135538-

    2023  

    Abstract: This work reports the optimization of a method using Molecularly Imprinted Polymers (MIPs) for the simultaneous determination of zearalenone and alternariol mycotoxins. The method was optimized using a chemometric approach where in the optimized ... ...

    Abstract This work reports the optimization of a method using Molecularly Imprinted Polymers (MIPs) for the simultaneous determination of zearalenone and alternariol mycotoxins. The method was optimized using a chemometric approach where in the optimized conditions, the cartridges with a mixture (50:50, w/w) of both MIPs, were loaded with 30 mL of sample, washed with 2 mL of ACN/water (20/80, v/v) and eluted with 2.5 mL of trifluoroacetic acid/MeOH (3/97, v/v). The extracts were analyzed by HPLC coupled to a fluorescence detector (FLD). The optimized method has been applied and validated to the analysis of the mycotoxins in maize, sunflower and olive oils samples with a limit of detection of 5 and 2 µg kg⁻¹, respectively. Recoveries were in the range of 94 % to 108 % (RSD < 6 %) for zearalenone and 92 % to 113 % (RSD < 5 %) for alternariol. The results were confirmed by HPLC-MS/MS.
    Schlagwörter Helianthus annuus ; chemometrics ; corn ; detection limit ; fluorescence ; food chemistry ; molecular imprinting ; oils ; olives ; polymers ; zearalenone ; Molecularly imprinted polymer ; Solid Phase Extraction ; Mycotoxin ; Alternariol
    Sprache Englisch
    Erscheinungsverlauf 2023-06
    Erscheinungsort Elsevier Ltd
    Dokumenttyp Artikel ; Online
    Anmerkung Use and reproduction
    ZDB-ID 243123-3
    ISSN 1873-7072 ; 0308-8146
    ISSN (online) 1873-7072
    ISSN 0308-8146
    DOI 10.1016/j.foodchem.2023.135538
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    Z 3634: Hefte anzeigen

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  7. Artikel ; Online: Unprecedented Reversible Real-Time Luminescent Sensing of H

    Urriza-Arsuaga, Idoia / Bedoya, Maximino / Orellana, Guillermo

    Analytical chemistry

    2019  Band 91, Heft 3, Seite(n) 2231–2238

    Abstract: Hydrogen sulfide monitoring has become essential in the natural gas industry, biogas production, wastewater treatment plants, paper mills, sewers, and landfills of waste due to its toxic, irritating, extremely flammable, and corrosive features. However, ... ...

    Abstract Hydrogen sulfide monitoring has become essential in the natural gas industry, biogas production, wastewater treatment plants, paper mills, sewers, and landfills of waste due to its toxic, irritating, extremely flammable, and corrosive features. However, each of the current monitoring technologies (gas chromatography, lead acetate tape, electrochemical, UV and NIR absorption) has its own limitations. Furthermore, the existing luminescent molecular probes for H
    Sprache Englisch
    Erscheinungsdatum 2019-01-09
    Erscheinungsland United States
    Dokumenttyp Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.8b04811
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.A 4033: Hefte anzeigen Standort:
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    bis Jg. 1994: Bestellungen von Artikeln über das Online-Bestellformular
    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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  8. Artikel ; Online: Interaction of a 1,3-Dicarbonyl Toxin with Ru(II)-Biimidazole Complexes for Luminescence Sensing: A Spectroscopic and Photochemical Experimental Study Rationalized by Time-Dependent Density Functional Theory Calculations.

    Quílez-Alburquerque, José / García-Iriepa, Cristina / Marazzi, Marco / Descalzo, Ana B / Orellana, Guillermo

    Inorganic chemistry

    2021  Band 61, Heft 1, Seite(n) 328–337

    Abstract: A family of ruthenium(II) complexes containing one 2,2'-biimidazole (bim) ligand and two polypyridyl (NN) ligands has been prepared and their photophysical and photochemical features have been tested in the presence of tenuazonic acid (TeA), a widespread ...

    Abstract A family of ruthenium(II) complexes containing one 2,2'-biimidazole (bim) ligand and two polypyridyl (NN) ligands has been prepared and their photophysical and photochemical features have been tested in the presence of tenuazonic acid (TeA), a widespread food and feed mycotoxin of current concern. While not tested in in vivo studies, TeA and other secondary metabolites of
    Sprache Englisch
    Erscheinungsdatum 2021-12-19
    Erscheinungsland United States
    Dokumenttyp Journal Article
    ZDB-ID 1484438-2
    ISSN 1520-510X ; 0020-1669
    ISSN (online) 1520-510X
    ISSN 0020-1669
    DOI 10.1021/acs.inorgchem.1c02887
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  9. Artikel: Unprecedented Reversible Real-Time Luminescent Sensing of H2S in the Gas Phase

    Urriza-Arsuaga, Idoia / Bedoya, Maximino / Orellana, Guillermo

    Analytical chemistry. 2018 Dec. 26, v. 91, no. 3

    2018  

    Abstract: Hydrogen sulfide monitoring has become essential in the natural gas industry, biogas production, wastewater treatment plants, paper mills, sewers, and landfills of waste due to its toxic, irritating, extremely flammable, and corrosive features. However, ... ...

    Abstract Hydrogen sulfide monitoring has become essential in the natural gas industry, biogas production, wastewater treatment plants, paper mills, sewers, and landfills of waste due to its toxic, irritating, extremely flammable, and corrosive features. However, each of the current monitoring technologies (gas chromatography, lead acetate tape, electrochemical, UV and NIR absorption) has its own limitations. Furthermore, the existing luminescent molecular probes for H2S cannot monitor it continuously due to the irreversibility of their reaction with the analyte. Herein, we report the development and application of the first reversible H2S luminescent sensor. The sensing layer capitalizes on the highly photooxidizing phosphorescent [bis(1,10-phenanthroline)(1,4,5,8-tetraazaphenanthrene)]ruthenium(II) dication immobilized on alkali-treated silica microspheres, interrogated with a dedicated fiber-optic phase-sensitive luminometer. The chemosensing mechanism is a fully reversible electron transfer from the analyte to the photoexcited dye. The H2S optosensor exhibits a 0.34–50 ppmv dynamic range, a limit of detection equal to 0.025 ppmv, repeatability, and reproducibility better than 3.2%, plus response and recovery times (t90 and t–90) shorter than 240 s. The H2S luminescent sensor performance has been verified for more than six months in a biomethane production plant, showing an excellent stability with automatic daily maintenance.
    Schlagwörter absorption ; biogas ; detection limit ; dyes ; electrochemistry ; electron transfer ; fiber optics ; gas chromatography ; gas production (biological) ; gases ; hydrogen sulfide ; landfills ; lead acetate ; methane ; microparticles ; monitoring ; oil and gas industry ; phosphorescence ; pulp and paper mills ; ruthenium ; sewer systems ; silica ; toxicity ; wastes ; wastewater treatment
    Sprache Englisch
    Erscheinungsverlauf 2018-1226
    Umfang p. 2231-2238.
    Erscheinungsort American Chemical Society
    Dokumenttyp Artikel
    ZDB-ID 1508-8
    ISSN 1520-6882 ; 0003-2700
    ISSN (online) 1520-6882
    ISSN 0003-2700
    DOI 10.1021/acs.analchem.8b04811
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  10. Artikel ; Online: Optimization of Temperature Sensing with Polymer-Embedded Luminescent Ru(II) Complexes.

    Bustamante, Nelia / Ielasi, Guido / Bedoya, Maximino / Orellana, Guillermo

    Polymers

    2018  Band 10, Heft 3

    Abstract: Temperature is a key parameter in many fields and luminescence-based temperature sensing is a solution for those applications in which traditional (mechanical, electrical, or IR-based) thermometers struggle. Amongst the indicator dyes for luminescence ... ...

    Abstract Temperature is a key parameter in many fields and luminescence-based temperature sensing is a solution for those applications in which traditional (mechanical, electrical, or IR-based) thermometers struggle. Amongst the indicator dyes for luminescence thermometry, Ru(II) polyazaheteroaromatic complexes are an appealing option to profit from the widespread commercial technologies for oxygen optosensing based on them. Six ruthenium dyes have been studied, engineering their structure for both photostability and highest temperature sensitivity of their luminescence. The most apt Ru(II) complex turned out to be bis(1,10-phenanthroline)(4-chloro-1,10-phenanthroline)ruthenium(II), due to the combination of two strong-field chelating ligands (phen) and a substituent with electron withdrawing effect on a conjugated position of the third ligand (4-Clphen). In order to produce functional sensors, the dye has been best embedded into poly(ethyl cyanoacrylate), due to its low permeability to O₂, high temperature sensitivity of the indicator dye incorporated into this polymer, ease of fabrication, and excellent optical quality. Thermosensitive elements have been fabricated thereof as optical fiber tips for macroscopic applications (water courses monitoring) and thin spots for microscopic uses (temperature measurements in cell culture-on-a-chip). With such dye/polymer combination, temperature sensing based on luminescence lifetime measurements allows 0.05 °C resolution with linear response in the range of interest (0⁻40 °C).
    Sprache Englisch
    Erscheinungsdatum 2018-02-26
    Erscheinungsland Switzerland
    Dokumenttyp Journal Article
    ZDB-ID 2527146-5
    ISSN 2073-4360 ; 2073-4360
    ISSN (online) 2073-4360
    ISSN 2073-4360
    DOI 10.3390/polym10030234
    Datenquelle MEDical Literature Analysis and Retrieval System OnLINE

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