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  1. Article: Chemotypes and radical scavenging activity of the essential oils from Artemisia arborescens L. growing in three areas of Bejaia (Algeria)

    Abderrahim, Azedine / Belhamel, Kamel / Chalard, Pierre / Figuérédo, Gilles

    Journal of food measurement & characterization. 2019 Sept., v. 13, no. 3

    2019  

    Abstract: Artemisia arborescens L. is a medicinal and aromatic plant used in traditional medicine for its therapeutic properties to treat lung diseases, gastrointestinal disorders, diabetes and inflammations. The leaves of A. arborescens L. were harvested in ... ...

    Abstract Artemisia arborescens L. is a medicinal and aromatic plant used in traditional medicine for its therapeutic properties to treat lung diseases, gastrointestinal disorders, diabetes and inflammations. The leaves of A. arborescens L. were harvested in Amizour, Cap Bouak and Sahel (Bejaia, Algeria) and their essential oils were analyzed by Gas Chromatography/Flame Ionization Detector and Gas Chromatography/Mass Spectrometry. The main constituents were β-thujone in the essential oil of Cap Bouak (59.8%), camphor in the volatile oil of Sahel (58.7%) and chamazulene in that of Amizour (31.4%). The radical scavenging activity of these essential oils was evaluated against DPPH and ABTS radicals by calculation of IC50. The best activity against DPPH and ABTS radicals were that of Sahel essential oil with IC50 DPPH = 133.0 μg/mL and IC50 ABTS = 211.6 μg/mL. The Spearman test revealed no significant correlations between IC50 DPPH and the chemical composition of the essential oil from A. arborescens L., while correlations with IC50 ABTS indicated that hydrocarbon monoterpenes, oxygenated monoterpenes and hydrocarbon sesquiterpenes promote activity against ABTS radical. These results can give prospects of using essential oils from A. arborescens L. as a natural adjunct in medicine formulations to treat diseases caused by oxidative stress.
    Keywords 2,2-diphenyl-1-picrylhydrazyl ; antioxidant activity ; Artemisia ; camphor ; chemical composition ; chemotypes ; diabetes ; essential oils ; flame ionization ; free radicals ; gas chromatography-mass spectrometry ; gastrointestinal diseases ; inhibitory concentration 50 ; leaves ; medicinal properties ; oxidative stress ; respiratory tract diseases ; Sahel ; sesquiterpenoids ; traditional medicine ; Algeria
    Language English
    Dates of publication 2019-09
    Size p. 2491-2499.
    Publishing place Springer US
    Document type Article
    ZDB-ID 2754612-3
    ISSN 2193-4134 ; 2193-4126
    ISSN (online) 2193-4134
    ISSN 2193-4126
    DOI 10.1007/s11694-019-00169-6
    Database NAL-Catalogue (AGRICOLA)

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  2. Article ; Online: A global outlook to the interruption of education due to COVID-19 pandemic

    Bozkurt, Aras / Jung, Insung / Xiao, Junhong / Vladimirschi, Viviane / Schuwer, Robert / Egorov, Gennady / Lambert, Sarah R / Al-Freih, Maha / Pete, Judith / Olcott, Jr. Don / Rodes, Virginia / Aranciaga, Ignacio / Bali, Maha / Alvarez, Jr., Abel V / Roberts, Jennifer / Pazurek, Angelica / Raffaghelli, Juliana Elisa / Panagiotou, Nikos / Coëtlogon, Perrine de /
    Shahadu, Sadik / Brown, Mark / Asino, Tutaleni I / Tumwesige, Josephine / Ramírez Reyes, Tzinti / Barrios Ipenza, Emma / Ossiannilsson, Ebba / Bond, Melissa / Belhamel, Kamel / Irvine, Valerie / Sharma, Ramesh C / Adam, Taskeen / Janssen, Ben / Sklyarova, Tatiana / Olcott, Nicoleta / Ambrosino, Alejandra / Lazou, Chrysoula / Mocquet, Bertrand / Mano, Mattias / Paskevicius, Michael

    Asian Journal of Distance Education 15(1) 1-126

    Navigating in a time of uncertainty and crisis

    2020  

    Abstract: Uncertain times require prompt reflexes to survive and this study is a collaborative reflex to better understand uncertainty and navigate through it. The Coronavirus (Covid-19) pandemic hit hard and interrupted many dimensions of our lives, particularly ... ...

    Abstract Uncertain times require prompt reflexes to survive and this study is a collaborative reflex to better understand uncertainty and navigate through it. The Coronavirus (Covid-19) pandemic hit hard and interrupted many dimensions of our lives, particularly education. As a response to interruption of education due to the Covid-19 pandemic, this study is a collaborative reaction that narrates the overall view, reflections from the K12 and higher educational landscape, lessons learned and suggestions from a total of 31 countries across the world with a representation of 62.7% of the whole world population. In addition to the value of each case by country, the synthesis of this research suggests that the current practices can be defined as emergency remote education and this practice is different from planned practices such as distance education, online learning or other derivations. Above all, this study points out how social injustice, inequity and the digital divide have been exacerbated during the pandemic and need unique and targeted measures if they are to be addressed. While there are support communities and mechanisms, parents are overburdened between regular daily/professional duties and emerging educational roles, and all parties are experiencing trauma, psychological pressure and anxiety to various degrees, which necessitates a pedagogy of care, affection and empathy. In terms of educational processes, the interruption of education signifies the importance of openness in education and highlights issues that should be taken into consideration such as using alternative assessment and evaluation methods as well as concerns about surveillance, ethics, and data privacy resulting from nearly exclusive dependency on online solutions.

    Bozkurt, A., Jung, I., Xiao, J., Vladimirschi, V., Schuwer, R., Egorov, G., Lambert, S. R., Al-Freih, M., Pete, J., Olcott, Jr., D. Rodes, V., Aranciaga, I., Bali, M., Alvarez, Jr., A. V., Roberts, J., Pazurek, A., Raffaghelli, J. E., Panagiotou, N., de Coëtlogon, P., Shahadu, S., Brown, M., Asino, T. I. Tumwesige, J., Ramírez Reyes, T., Barrios Ipenza, E., Ossiannilsson, E., Bond, M., Belhamel, K., Irvine, V., Sharma, R. C., Adam, T., Janssen, B., Sklyarova, T., Olcott, N. Ambrosino, A., Lazou, C., Mocquet, B., Mano, M., & Paskevicius, M. (2020). A global outlook to the interruption of education due to COVID-19 pandemic: Navigating in a time of uncertainty and crisis. Asian Journal of Distance Education, 15(1), 1-126. https://doi.org/10.5281/zenodo.3778083
    Keywords emergency remote education ; distance education ; online learning ; Coronavirus Pandemic ; Covid-19 ; emergency remote teaching ; Education ; Educational Technology ; Coronavirus ; covid19
    Subject code 370
    Language English
    Publishing date 2020-06-05
    Publishing country eu
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: A global outlook to the interruption of education due to COVID-19 pandemic

    Bozkurt, Aras / Jung, Insung / Xiao, Junhong / Vladimirschi, Viviane / Schuwer, Robert / Egorov, Gennady / Lambert, Sarah R. / Al-Freih, Maha / Pete, Judith / Olcott, Don Jr / Rodes, Virginia / Aranciaga, Ignacio / Bali, Maha / Alvarez, Abel V. Jr / Roberts, Jennifer / Pazurek, Angelica / Raffaghelli, Juliana Elisa / Panagiotou, Nikos / de Coëtlogon, Perrine /
    Shahadu, Sadik / Brown, Mark / Asino, Tutaleni I. / Tumwesige, Josephine / Ramírez Reyes, Tzinti / Barrios Ipenza, Emma / Ossiannilsson, Ebba / Bond, Melissa / Belhamel, Kamel / Irvine, Valerie / Sharma, Ramesh C. / Adam, Taskeen / Janssen, Ben / Sklyarova, Tatiana / Olcott, Nicoleta / Ambrosino, Alejandra / Lazou, Chrysoula / Mocquet, Bertrand / Mano, Mattias / Paskevicius, Michael

    Navigating in a time of uncertainty and crisis

    2020  

    Abstract: Uncertain times require prompt reflexes to survive and this study is a collaborative reflex to better understand uncertainty and navigate through it. The Coronavirus (Covid-19) pandemic hit hard and interrupted many dimensions of our lives, particularly ... ...

    Abstract Uncertain times require prompt reflexes to survive and this study is a collaborative reflex to better understand uncertainty and navigate through it. The Coronavirus (Covid-19) pandemic hit hard and interrupted many dimensions of our lives, particularly education. As a response to interruption of education due to the Covid-19 pandemic, this study is a collaborative reaction that narrates the overall view, reflections from the K-12 and higher educational landscape, lessons learned and suggestions from a total of 31 countries across the world with a representation of 62,7% of the whole world population. In addition to the value of each case by country, the synthesis of this research suggests that the current practices can be defined as emergency remote education and this practice is different from planned practices such as distance education, online learning or other derivations. Above all, this study points out how social injustice, inequity and the digital divide have been exacerbated during the pandemic and need unique and targeted measures if they are to be addressed. While there are support communities and mechanisms, parents are overburdened between regular daily/professional duties and emerging educational roles, and all parties are experiencing trauma, psychological pressure and anxiety to various degrees, which necessitates a pedagogy of care, affection and empathy. In terms of educational processes, the interruption of education signifies the importance of openness in education and highlights issues that should be taken into consideration such as using alternative assessment and evaluation methods as well as concerns about surveillance, ethics, and data privacy resulting from nearly exclusive dependency on online solutions.

    We would like to thank Apostolos Koutropoulos, Bea de los Arcos, Christian Dalsgaard, George Veletsianos, Ken Bauer Favel, and Martin Weller for their support to reach co-authors from different countries. Besides, we appreciate the suggestions from three anonymous reviewers who provided prompt feedbacks in a tight schedule. We also acknowledge the support of Anadolu University SRP Commission (1905E079).

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    Reviewed
    Keywords emergency remote education ; distance education ; online learning ; Coronavirus Pandemic ; covid19
    Subject code 370
    Language English
    Publisher Asian Journal of Distance Education
    Publishing country ca
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

    More links

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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