Aloysia citrodora - Explore the Science & Experts | ideXlab

Scan Science and Technology

Contact Leading Edge Experts & Companies

Aloysia citrodora

The Experts below are selected from a list of 300 Experts worldwide ranked by ideXlab platform

Aloysia citrodora – Free Register to Access Experts & Abstracts

Isabel C.f.r. Ferreira – One of the best experts on this subject based on the ideXlab platform.

  • Effects of gamma radiation on the bioactivity of medicinal and aromatic plants: Mentha × piperita L., Thymus vulgaris L. and Aloysia citrodora Paláu as case studies.
    Food & function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • effects of gamma radiation on the bioactivity of medicinal and aromatic plants mentha piperita l thymus vulgaris l and Aloysia citrodora palau as case studies
    Food & Function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • exploring reserve lots of cymbopogon citratus Aloysia citrodora and thymus citriodorus as improved sources of phenolic compounds
    Food Chemistry, 2018
    Co-Authors: Ingride Rita, Carla Pereira, Lillian Barros, Isabel C.f.r. Ferreira
    Abstract:

    Abstract Given the increasing consumers demand for novelty, tea companies have been presenting new added value products such as reserve lots of aromatic plants. Herein, infusions from different lots of three aromatic plants were assessed in terms of phenolic composition (HPLC-DAD-ESI/MS) and antioxidant properties (reducing power, free radical scavenging and lipid peroxidation inhibition capacity). Cymbopogon citratus (C. citratus; main compound 5-O-caffeoylquinic acid) and Aloysia citrodora (A. citrodora; prevalence of verbascoside) reserve lots revealed higher phenolic compounds concentration than the respective standard lots. Thymus × citriodorus (T. citriodorus; main compound rosmarinic acid) standard lot presented higher amounts of phenolic acids than the reserve lot, nonetheless, total flavonoids and phenolic compounds were not significantly different. The differences between both lots antioxidant activity were more noticeable in C. citratus, with the reserve lot presenting the highest activity. This study provides evidence of the differences between these plants chemical composition and bioactivity depending on the harvesting conditions.

Ferreira, Isabel C.f.r. – One of the best experts on this subject based on the ideXlab platform.

  • Evaluation of gamma-irradiated aromatic herbs: Chemometric study of samples submitted to extended storage periods
    'Elsevier BV', 2018
    Co-Authors: Pereira Eliana, Cabo Verde Sandra, Antonio, Amilcar L., Barros Lillian, Barreira, João C.m., Oliveira Beatriz, Ferreira, Isabel C.f.r.
    Abstract:

    The preserving capacity of gamma radiation (10 kGy) on the chemical, nutritional and antioxidant components of Aloysia citrodora Paláu, Melissa officinalis L., Melittis melissophyllum L. and Mentha piperita L., stored for 12 and 18 months, was evaluated. Despite the maintenance of the main characteristics during the first 12 months of storage, the additional 6 months induced several significant changes in individual compounds. In general, the analyzed species reacted dissimilarly throughout time, but it was possible to verify that the fatty acids, tocopherols and antioxidant capacity presented the most significant changes after 18 months of storage, inclusively in samples submitted to gamma radiation. In fact, the applied treatment (10 kGy) did not seem to be effective to prevent the decrease of free sugars, organic acids and tocopherols, especially considering the 18 months period. On the other hand, the evolution in color parameters indicated a greener color (yet slightly more yellow) among irradiated samples. Likewise, gamma radiation had a positive effect on oleic acid, β-carotene bleaching inhibition (in infusions), DPPH scavenging activity and reducing power (in methanolic extracts). Nevertheless, it might be generally concluded that gamma radiation is less suitable than electron-beam to maintain the characteristics of dried herbs during extended storage periods.The authors are grateful to the Ministry of Agriculture, Portugal (Project PRODER/FEADER/EU, AROMAP), for financial support of the work and E. Pereira grant. Authors also thank Foundation for Science and Technology (FCT, Portugal) for financial support to CIMO (UID/ AGR/00690/2013), REQUIMTE (UID/QUI/50006/2013 – POCI/01/ 0145/FEDER/007265), C2TN (RECI/AAG-TEC/0400/2012 and UID/ Multi/04349/2013 projects), J.C.M. Barreira (BPD/72802/2010) and L. Barros (SFRH/BPD/107855/2015) grants. The authors are also grateful to “MaisErvas – Aromáticas e Medicinais” for providing the plant material.info:eu-repo/semantics/publishedVersio

  • Avaliação do perfil fenólico de duas plantas comummente utilizadas na medicina tradicional, após aplicação de irradiação ionizante
    , 2018
    Co-Authors: Pereira Eliana, Cabo Verde Sandra, Antonio, Amilcar L., Barros Lillian, Pimenta Andreia, Calhelha, Ricardo C., Santos-buelga Celestino, Mandim Filipa, Ferreira, Isabel C.f.r.
    Abstract:

    Os compostos fenólicos têm sido associados a diversos efeitos benéficos nomeadamente, na prevenção de algumas doenças, tais como, diabetes, cancro, doenças cardiovasculares, obesidade, doenças neuro-degenerativas, entre outras. São várias as matrizes que representam uma boa fonte deste tipo de compostos, principalmente no reino vegetal. Assim, este estudo pretendeu avaliar os efeitos da radiação gama na composição fenólica de extratos aquosos, obtidos por infusão de duas plantas comummente apreciadas pelo consumidor e usadas na medicina tradicional – Aloysia citrodora L. (limonete) e Mentha x piperita L. (hortelã-pimenta). O tratamento de irradiação foi realizado através de uma câmara de 60Co, aplicando as doses de 1 e 10 kGy e os resultados foram comparados com amostras controlo (0 kGy). O perfil fenólico foi obtido por HPLC-DAD-ESI/MS. Foram identificados 11 e 14 compostos fenólicos (derivados de flavonoides e ácidos fenólicos) nas espécies A. citrodora e M. piperita, respetivamente. Relativamente aos resultados obtidos após a aplicação deste tipo de processamento, foi evidente que as amostras submetidas a uma dose de irradiação de 10 kGy, revelaram diferenças estatisticamente significativas no perfil fenólico de ambos os extratos estudados, comparativamente com a amostra controlo (0 kGy), evidenciando um aumento na maioria dos compostos, como também nos teores de ácidos fenólicos totais e compostos fenólicos totais. Assim, este estudo contribuiu para um conhecimento mais amplo dos efeitos da irradiação gama nestas moléculas, revelando também que este tipo de processamento pode ser aplicado em plantas aromáticas e medicinais.FCT, Portugal e ao FEDER no âmbito do programa PT2020 pelo apoio financeiro ao CIMO (UID/AGR/00690/2013) e CTN (RECI/AAG-TEC/0400/2012) e contracto de L. Barros; Programa FEDER-Interreg España-Portugal pelo apoio financeiro através do projeto 0377_Iberphenol_6_E.info:eu-repo/semantics/publishedVersio

  • Effects of gamma radiation on phenolic composition, cytotoxicity, antibacterial and virucidal activities of two medicinal plants
    , 2018
    Co-Authors: Pereira Eliana, Cabo Verde Sandra, Antonio, Amilcar L., Barros Lillian, Pimenta Andreia, Calhelha, Ricardo C., Santos-buelga Celestino, Ferreira, Isabel C.f.r.
    Abstract:

    The consumers’ interest for a healthier diet and the use of natural products in the prevention and/or treatment of health problems has triggered an intensive search for bioactive plant compounds. Plants are a good source of phenolic compounds, terpenoids, alkaloids, quinones, carotenoids, sterols, glucosinolates and other compounds, which provide health benefits due to their wide range of biological properties. This work aimed to evaluate the effects of gamma radiation on the phenolic composition, cytotoxicity, virucidal and antimicrobial properties of Aloysia citrodora L. and Mentha x piperita L. infusions. Gamma radiation treatment was performed in a 60Co chamber, applying the doses of 1 and 10 kGy and the results were compared with the control sample (0 kGy). The phenolic compounds profile was obtained by HPLC-DAD-ESI/MS and the cytotoxicity was evaluated in human tumour cell lines and in a primary cell culture. For virucidal efficacy evaluation, MNV-1 and HAdV-5 viral titers were determined by plaque assay in Raw264.7 and A549 cell lines, respectively. The antibacterial activity was evaluated against Gram-negative and Gram-positive bacteria. Radiation treatment has been shown to cause different effects on phenolic concentrations and virucidal efficacy, depending on the plant species studied, the virus and the absorbed dose. In cytotoxicity assay A. citrodora did not reveal significant statistically differences considering the different doses applied, however M. piperita at 10 kGy stood out with the highest cytotoxic potential in all tested cell lines. Regarding antibacterial assays, S. aureus was the only bacteria that was sensible to the infusions of non-irradiated and 1 kGy irradiated in both species. Thus, this study contribute to a wider knowledge of the effects of gamma irrairradiation on several relevant bioactive potentials of some aromatic and medicinal plants and showed that gamma radiation is a technique recommended for these matrices.The authors are grateful to the Foundation for Science and Technology (FCT, Portugal) and FEDER under Programme PT2020 for financial support to CIMO (UID/AGR/00690/2013) and CTN (RECI/AAG-TEC/0400/2012). The authors are also grateful to FEDER-Interreg España-Portugal programme for financial support through the project 0377_Iberphenol_6_E.info:eu-repo/semantics/publishedVersio

Lillian Barros – One of the best experts on this subject based on the ideXlab platform.

  • Effects of gamma radiation on the bioactivity of medicinal and aromatic plants: Mentha × piperita L., Thymus vulgaris L. and Aloysia citrodora Paláu as case studies.
    Food & function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • effects of gamma radiation on the bioactivity of medicinal and aromatic plants mentha piperita l thymus vulgaris l and Aloysia citrodora palau as case studies
    Food & Function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • exploring reserve lots of cymbopogon citratus Aloysia citrodora and thymus citriodorus as improved sources of phenolic compounds
    Food Chemistry, 2018
    Co-Authors: Ingride Rita, Carla Pereira, Lillian Barros, Isabel C.f.r. Ferreira
    Abstract:

    Abstract Given the increasing consumers demand for novelty, tea companies have been presenting new added value products such as reserve lots of aromatic plants. Herein, infusions from different lots of three aromatic plants were assessed in terms of phenolic composition (HPLC-DAD-ESI/MS) and antioxidant properties (reducing power, free radical scavenging and lipid peroxidation inhibition capacity). Cymbopogon citratus (C. citratus; main compound 5-O-caffeoylquinic acid) and Aloysia citrodora (A. citrodora; prevalence of verbascoside) reserve lots revealed higher phenolic compounds concentration than the respective standard lots. Thymus × citriodorus (T. citriodorus; main compound rosmarinic acid) standard lot presented higher amounts of phenolic acids than the reserve lot, nonetheless, total flavonoids and phenolic compounds were not significantly different. The differences between both lots antioxidant activity were more noticeable in C. citratus, with the reserve lot presenting the highest activity. This study provides evidence of the differences between these plants chemical composition and bioactivity depending on the harvesting conditions.

Sandra Cabo Verde – One of the best experts on this subject based on the ideXlab platform.

  • Target specific post-harvest treatment by gamma radiation for the microbial safety of dried Melissa officinalis and Aloysia citrodora.
    Applied radiation and isotopes : including data instrumentation and methods for use in agriculture industry and medicine, 2020
    Co-Authors: Márcia Meneses, Amilcar L. Antonio, Sandra Cabo Verde
    Abstract:

    This study aimed to assess a specific gamma radiation dose to be applied as a post-harvest process to guarantee the microbial safety of two medicinal plants, Melissa officinalis and Aloysia citrodora. Dried plants treated with gamma radiation indicated that a dose of 5 kGy could be applied as a post-harvest treatment process of M. officinalis and A. citrodora, assuring the microbial safety of dried medicinal plants and lowering the potentiality of deleterious effects on plants’ quality attributes. This will enhance the safety and quality of the dried plants to be used as raw materials in industrial applications.

  • Effects of gamma radiation on the bioactivity of medicinal and aromatic plants: Mentha × piperita L., Thymus vulgaris L. and Aloysia citrodora Paláu as case studies.
    Food & function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • effects of gamma radiation on the bioactivity of medicinal and aromatic plants mentha piperita l thymus vulgaris l and Aloysia citrodora palau as case studies
    Food & Function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

Eliana Pereira – One of the best experts on this subject based on the ideXlab platform.

  • effects of gamma radiation on the bioactivity of medicinal and aromatic plants mentha piperita l thymus vulgaris l and Aloysia citrodora palau as case studies
    Food & Function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • Effects of gamma radiation on the bioactivity of medicinal and aromatic plants: Mentha × piperita L., Thymus vulgaris L. and Aloysia citrodora Paláu as case studies.
    Food & function, 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, Andreia I. Pimenta, Ricardo C. Calhelha, Isabel C.f.r. Ferreira
    Abstract:

    Irradiation is a feasible and safe decontamination technique, being applied to several types of foods including edible and medicinal plants. The aim of this study was to evaluate the effects of different gamma radiation doses (1, 5 and 10 kGy) on the individual profile of phenolic compounds determined by HPLC-DAD-ESI/MS, and the bioactive potential (cytotoxic, virucidal, and antimicrobial activities) of Aloysia citrodora Palau (lemon verbena), Mentha × piperita L. (peppermint) and Thymus vulgaris L. (thyme). The observed cytotoxic activity varied with the plant and with the applied dose, being higher in Thymus vulgaris irradiated with 10 kGy. The virucidal activity was also dependent on the radiation dose, but was preserved with irradiation treatment. Gamma rays had no effect on the antimicrobial activity of the studied plants. Otherwise, the effects of gamma radiation on the phenolic profile were heterogeneous, with an increase in some compounds and decrease in others, depending on the species and on the radiation dose.

  • Evaluation of gamma-irradiated aromatic herbs: Chemometric study of samples submitted to extended storage periods.
    Food research international (Ottawa Ont.), 2018
    Co-Authors: Eliana Pereira, Sandra Cabo Verde, Amilcar L. Antonio, Lillian Barros, João C.m. Barreira, M. Beatriz P.p. Oliveira, Isabel C.f.r. Ferreira
    Abstract:

    Abstract The preserving capacity of gamma radiation (10 kGy) on the chemical, nutritional and antioxidant components of Aloysia citrodora Palau, Melissa officinalis L., Melittis melissophyllum L. and Mentha piperita L., stored for 12 and 18 months, was evaluated. Despite the maintenance of the main characteristics during the first 12 months of storage, the additional 6 months induced several significant changes in individual compounds. In general, the analyzed species reacted dissimilarly throughout time, but it was possible to verify that the fatty acids, tocopherols and antioxidant capacity presented the most significant changes after 18 months of storage, inclusively in samples submitted to gamma radiation. In fact, the applied treatment (10 kGy) did not seem to be effective to prevent the decrease of free sugars, organic acids and tocopherols, especially considering the 18 months period. On the other hand, the evolution in color parameters indicated a greener color (yet slightly more yellow) among irradiated samples. Likewise, gamma radiation had a positive effect on oleic acid, β-carotene bleaching inhibition (in infusions), DPPH scavenging activity and reducing power (in methanolic extracts). Nevertheless, it might be generally concluded that gamma radiation is less suitable than electron-beam to maintain the characteristics of dried herbs during extended storage periods.