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  1. Article: Microencapsulation of

    García-Jiménez, Jair R / Luna-Guevara, María L / Luna-Guevara, Juan J / Conde-Hernández, Lilia A / Ramos-Cassellis, María E / Hernández-Cocoletzi, Heriberto

    Foods (Basel, Switzerland)

    2024  Volume 13, Issue 7

    Abstract: Bioactive compounds from medicinal plants have applications in the development of functional foods. However, since they are unstable, encapsulation is used as a conservation alternative. This work aimed to assess the bioactive properties (antioxidant and ...

    Abstract Bioactive compounds from medicinal plants have applications in the development of functional foods. However, since they are unstable, encapsulation is used as a conservation alternative. This work aimed to assess the bioactive properties (antioxidant and hypoglycemic) of different extracts, including the infusion, as well as their spray-dried microencapsulates from
    Language English
    Publishing date 2024-03-25
    Publishing country Switzerland
    Document type Journal Article
    ZDB-ID 2704223-6
    ISSN 2304-8158
    ISSN 2304-8158
    DOI 10.3390/foods13071001
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Pseudocrossidium replicatum (Taylor) R.H. Zander is a fully desiccation-tolerant moss that expresses an inducible molecular mechanism in response to severe abiotic stress.

    Ríos-Meléndez, Selma / Valadez-Hernández, Emmanuel / Delgadillo, Claudio / Luna-Guevara, Maria L / Martínez-Núñez, Mario A / Sánchez-Pérez, Mishael / Martínez-Y-Pérez, José L / Arroyo-Becerra, Analilia / Cárdenas, Luis / Bibbins-Martínez, Martha / Maldonado-Mendoza, Ignacio E / Villalobos-López, Miguel Angel

    Plant molecular biology

    2021  Volume 107, Issue 4-5, Page(s) 387–404

    Abstract: Key message: The moss Pseudocrossidium replicatum is a desiccation-tolerant species that uses an inducible system to withstand severe abiotic stress in both protonemal and gametophore tissues. Desiccation tolerance (DT) is the ability of cells to ... ...

    Abstract Key message: The moss Pseudocrossidium replicatum is a desiccation-tolerant species that uses an inducible system to withstand severe abiotic stress in both protonemal and gametophore tissues. Desiccation tolerance (DT) is the ability of cells to recover from an air-dried state. Here, the moss Pseudocrossidium replicatum was identified as a fully desiccation-tolerant (FDT) species. Its gametophores rapidly lost more than 90% of their water content when exposed to a low-humidity atmosphere [23% relative humidity (RH)], but abscisic acid (ABA) pretreatment diminished the final water loss after equilibrium was reached. P. replicatum gametophores maintained good maximum photosystem II (PSII) efficiency (Fv/Fm) for up to two hours during slow dehydration; however, ABA pretreatment induced a faster decrease in the Fv/Fm. ABA also induced a faster recovery of the Fv/Fm after rehydration. Protein synthesis inhibitor treatment before dehydration hampered the recovery of the Fv/Fm when the gametophores were rehydrated after desiccation, suggesting the presence of an inducible protective mechanism that is activated in response to abiotic stress. This observation was also supported by accumulation of soluble sugars in gametophores exposed to ABA or NaCl. Exogenous ABA treatment delayed the germination of P. replicatum spores and induced morphological changes in protonemal cells that resembled brachycytes. Transcriptome analyses revealed the presence of an inducible molecular mechanism in P. replicatum protonemata that was activated in response to dehydration. This study is the first RNA-Seq study of the protonemal tissues of an FDT moss. Our results suggest that P. replicatum is an FDT moss equipped with an inducible molecular response that prepares this species for severe abiotic stress and that ABA plays an important role in this response.
    MeSH term(s) Abscisic Acid/pharmacology ; Adaptation, Physiological/drug effects ; Adaptation, Physiological/genetics ; Alpha-Amanitin/pharmacology ; Bryopsida/genetics ; Bryopsida/metabolism ; Cycloheximide/pharmacology ; Dehydration ; Gene Expression Profiling/methods ; Gene Expression Regulation, Plant/drug effects ; Gene Expression Regulation, Plant/genetics ; Geography ; Mexico ; Nucleic Acid Synthesis Inhibitors/pharmacology ; Plant Growth Regulators/pharmacology ; Protein Synthesis Inhibitors/pharmacology ; RNA-Seq/methods ; Stress, Physiological ; Time Factors
    Chemical Substances Alpha-Amanitin ; Nucleic Acid Synthesis Inhibitors ; Plant Growth Regulators ; Protein Synthesis Inhibitors ; Abscisic Acid (72S9A8J5GW) ; Cycloheximide (98600C0908)
    Language English
    Publishing date 2021-06-29
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 778032-1
    ISSN 1573-5028 ; 0167-4412
    ISSN (online) 1573-5028
    ISSN 0167-4412
    DOI 10.1007/s11103-021-01167-3
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 3458: Show issues Location:
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  3. Article: Pseudocrossidium replicatum (Taylor) R.H. Zander is a fully desiccation-tolerant moss that expresses an inducible molecular mechanism in response to severe abiotic stress

    Ríos-Meléndez, Selma / Valadez-Hernández, Emmanuel / Delgadillo, Claudio / Luna-Guevara, Maria L. / Martínez-Núñez, Mario A. / Sánchez-Pérez, Mishael / Martínez-y-Pérez, José L. / Arroyo-Becerra, Analilia / Cárdenas, Luis / Bibbins-Martínez, Martha / Maldonado-Mendoza, Ignacio E. / Villalobos-López, Miguel Angel

    Plant molecular biology. 2021 Nov., v. 107, no. 4-5

    2021  

    Abstract: KEY MESSAGE: The moss Pseudocrossidium replicatum is a desiccation-tolerant species that uses an inducible system to withstand severe abiotic stress in both protonemal and gametophore tissues. Desiccation tolerance (DT) is the ability of cells to recover ...

    Abstract KEY MESSAGE: The moss Pseudocrossidium replicatum is a desiccation-tolerant species that uses an inducible system to withstand severe abiotic stress in both protonemal and gametophore tissues. Desiccation tolerance (DT) is the ability of cells to recover from an air-dried state. Here, the moss Pseudocrossidium replicatum was identified as a fully desiccation-tolerant (FDT) species. Its gametophores rapidly lost more than 90% of their water content when exposed to a low-humidity atmosphere [23% relative humidity (RH)], but abscisic acid (ABA) pretreatment diminished the final water loss after equilibrium was reached. P. replicatum gametophores maintained good maximum photosystem II (PSII) efficiency (Fv/Fm) for up to two hours during slow dehydration; however, ABA pretreatment induced a faster decrease in the Fv/Fm. ABA also induced a faster recovery of the Fv/Fm after rehydration. Protein synthesis inhibitor treatment before dehydration hampered the recovery of the Fv/Fm when the gametophores were rehydrated after desiccation, suggesting the presence of an inducible protective mechanism that is activated in response to abiotic stress. This observation was also supported by accumulation of soluble sugars in gametophores exposed to ABA or NaCl. Exogenous ABA treatment delayed the germination of P. replicatum spores and induced morphological changes in protonemal cells that resembled brachycytes. Transcriptome analyses revealed the presence of an inducible molecular mechanism in P. replicatum protonemata that was activated in response to dehydration. This study is the first RNA-Seq study of the protonemal tissues of an FDT moss. Our results suggest that P. replicatum is an FDT moss equipped with an inducible molecular response that prepares this species for severe abiotic stress and that ABA plays an important role in this response.
    Keywords Sander lucioperca ; abiotic stress ; abscisic acid ; air drying ; drought tolerance ; gametophores ; germination ; molecular biology ; mosses and liverworts ; photosystem II ; protein synthesis inhibitors ; protonemata ; rehydration ; relative humidity ; sequence analysis ; transcriptome ; water content
    Language English
    Dates of publication 2021-11
    Size p. 387-404.
    Publishing place Springer Netherlands
    Document type Article
    ZDB-ID 778032-1
    ISSN 1573-5028 ; 0167-4412
    ISSN (online) 1573-5028
    ISSN 0167-4412
    DOI 10.1007/s11103-021-01167-3
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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    In stock of ZB MED Bonn / Germany

    Einzelsign.: Show issues
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  4. Article: Eficiencia de la desinfección con aceites esenciales y ultrasonido sobre Escherichia coli inoculada en frutos de tomate y el impacto sobre la actividad antioxidante.

    Luna Guevara, María L / Luna Guevara, Juan J / Ruiz Espinosa, Héctor / Leyva Abascal, Lucero / Díaz González, Carolina B

    Revista Argentina de microbiologia

    2015  Volume 47, Issue 3, Page(s) 251–255

    Abstract: Fresh produce often harbors a great number of microorganisms; hence, its growing demand may constitute a risk for consumers. The aim of this study was to evaluate the efficacy of several disinfection procedures against enterotoxigenic Escherichia coli ( ... ...

    Title translation Efficacy of disinfection treatments using essential oils and ultrasound on tomato fruits inoculated with Escherichia coli and impact on antioxidant activity.
    Abstract Fresh produce often harbors a great number of microorganisms; hence, its growing demand may constitute a risk for consumers. The aim of this study was to evaluate the efficacy of several disinfection procedures against enterotoxigenic Escherichia coli (ETEC) inoculated on tomato fruits and the conservation of the antioxidant properties of these disinfected fruits. Fruits were immersed for 5 or 10min in oregano or thyme essential oil dispersions (5, 10ppm), with or without ultrasound treatment. Antioxidant activity of disinfected fruits was determined as the ability to scavenge 2,2-diphenyl-1-pricrylhydrazyl (DPPH) radicals and was reported as percentage of inhibition (%I). The most efficient disinfectant treatments showing significant differences (p≤.05) between the reductions log10 CFU/g (S) of ETEC were those using 10ppm oregano for 10min, with S=3.05 in individual treatments and S=4.03 in mixed treatments. The highest %I was obtained with individual sonication treatments (69.52 and 72.48), while in combined treatments the %I values increased with thyme oil 5ppm and ultrasound for 5min (51.27%) and 10min (53.31%).
    MeSH term(s) Antioxidants/pharmacology ; Disinfectants ; Disinfection/methods ; Emulsions ; Enterotoxigenic Escherichia coli/drug effects ; Food Microbiology ; Lycopersicon esculentum/microbiology ; Oils, Volatile/isolation & purification ; Oils, Volatile/pharmacology ; Origanum/chemistry ; Oxidation-Reduction ; Plant Leaves/chemistry ; Plant Oils/isolation & purification ; Plant Oils/pharmacology ; Sonication ; Thymus Plant/chemistry
    Chemical Substances Antioxidants ; Disinfectants ; Emulsions ; Oils, Volatile ; Plant Oils
    Language Spanish
    Publishing date 2015-07
    Publishing country Argentina
    Document type Comparative Study ; English Abstract ; Evaluation Studies ; Journal Article
    ZDB-ID 731952-6
    ISSN 0325-7541
    ISSN 0325-7541
    DOI 10.1016/j.ram.2015.04.004
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4243: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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  5. Article: Eficiencia de la desinfección con aceites esenciales y ultrasonido sobre Escherichia coli inoculada en frutos de tomate y el impacto sobre la actividad antioxidante

    Luna Guevara, María L / Luna Guevara, Juan J / Ruiz Espinosa, Héctor / Leyva Abascal, Lucero / Díaz González, Carolina B

    Asociación Argentina de Microbiología Revista argentina microbiología. 2015 July, Sept., v. 47, no. 3

    2015  

    Abstract: Fresh produce often harbors a great number of microorganisms; hence, its growing demand may constitute a risk for consumers. The aim of this study was to evaluate the efficacy of several disinfection procedures against enterotoxigenic Escherichia coli ( ... ...

    Abstract Fresh produce often harbors a great number of microorganisms; hence, its growing demand may constitute a risk for consumers. The aim of this study was to evaluate the efficacy of several disinfection procedures against enterotoxigenic Escherichia coli (ETEC) inoculated on tomato fruits and the conservation of the antioxidant properties of these disinfected fruits. Fruits were immersed for 5 or 10min in oregano or thyme essential oil dispersions (5, 10ppm), with or without ultrasound treatment. Antioxidant activity of disinfected fruits was determined as the ability to scavenge 2,2-diphenyl-1-pricrylhydrazyl (DPPH) radicals and was reported as percentage of inhibition (%I). The most efficient disinfectant treatments showing significant differences (p≤.05) between the reductions log₁₀ CFU/g (S) of ETEC were those using 10ppm oregano for 10min, with S=3.05 in individual treatments and S=4.03 in mixed treatments. The highest %I was obtained with individual sonication treatments (69.52 and 72.48), while in combined treatments the %I values increased with thyme oil 5ppm and ultrasound for 5min (51.27%) and 10min (53.31%).
    Keywords antioxidant activity ; antioxidants ; disinfectants ; disinfection ; enterotoxigenic Escherichia coli ; fresh produce ; oregano ; risk ; sonication ; thyme ; thyme oil ; tomatoes ; ultrasonic treatment ; ultrasonics
    Language English
    Dates of publication 2015-07
    Size p. 251-255.
    Publishing place Elsevier España, S.L.U.
    Document type Article
    Note NAL-AP-2-clean
    ZDB-ID 731952-6
    ISSN 0325-7541
    ISSN 0325-7541
    DOI 10.1016/j.ram.2015.04.004
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Zs.A 4243: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
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    Jg. 1995 - 2021: Lesesall (2.OG)
    ab Jg. 2022: Lesesaal (EG)

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