738 research outputs found
CHEMICAL AND BIOLOGICAL INVESTIGATION OF SOME SPECIES OF SALVIA
No full textOne of the most significant families of herbaceous plants is the Lamiaceae. It includes a large number of species with noteworthy biological and medicinal uses. The genus Salvia is of particular importance due to its production of secondary metabolites such as phenolics, terpenoids, flavonoids and volatile compounds, which are of significant value in the pharmaceutical, food and perfumery industries. An emerging area of interest is the potential of plant extracts as natural alternatives to mitigate agricultural losses caused by phytopathogenic fungi and bacteria. My thesis work mainly focuses on investigating the phytochemical composition and biological activities of various Salvia species. This study aims to contribute to this field by exploring the bioactive potential of Salvia spp. for environmentally friendly agricultural solutions.
The biomass of Salvia spp. was subjected to surface extraction with dichloromethane and purified by applying different chromatographic techniques. The phytochemical profile was studied by LC-MS and NMR analysis. The crude extracts were evaluated for their antimicrobial and insecticidal potential. Exudates of S. discolor and S. karwinskii showed an abundance of clerodane-type diterpenoids. The crude extract demonstrated a broad spectrum of antimicrobial activity against different phytopathogens.
Moreover, surface extracts of S. buchanani, S. corrugata, S. discolor, S. karwinskii, and S. namaensis were evaluated against an invasive pest Tuta absoluta. All extracts showed significant mortality rates, in particular, S. discolor and S. karwinskii exhibited strong antifeedant and insecticidal effects.
In addition, biotechnological approaches were used to develop an in vitro micropropagation protocol and establish hairy roots (HRs) for S. oxyphora. Extracellular vesicles (EVs) were successfully isolated from the liquid culture of HRs. EVs are mixtures of heterogeneous populations of structures with a wide size distribution (30-1000 nm). Plant-derived EVs show great promise as next-generation drug delivery systems, as they can concentrate and transport various bioactive molecules to human cells.
These findings highlight the versatility and potential of Salvia species as a natural, sustainable resource for controlling phytopathogens and pests. By advancing our understanding of their bioactive compounds, this research contributes to developing environmentally friendly solutions to agricultural challenges. It highlights the broader applications of plant-derived products in science and industry
Ananda Devi – pisarka skrzyżowania kultur
No full textAnanda Devi is a francophone-Mauritian writer who lives (and creates) near Geneva. She is the author of numerous novels, short stories and volumes of poetry. Although the stories of her characters are fictitious, Devi’s texts are strongly inspired by her native island, its history and its ethnic, cultural and linguistic heterogeneity. In her novels, Devi employs numerous stylistic devices to empower individuals who are regarded as worse, excluded from the society due to their deficits.Ananda Devi is a francophone-Mauritian writer who lives (and creates) near Geneva. She is the author of numerous novels, short stories and volumes of poetry. Although the stories of her characters are fictitious, Devi’s texts are strongly inspired by her native island, its history and its ethnic, cultural and linguistic heterogeneity. In her novels, Devi employs numerous stylistic devices to empower individuals who are regarded as worse, excluded from the society due to their deficits
Potential of Salvia discolor Extract Against Common Agricultural Pathogens
No full textPhytopathogenic fungi and bacteria pose a serious threat to global agriculture, leading to significant economic losses and potential health risks. Consequently, the search for natural alternatives to synthetic agrochemicals has garnered increasing scientific attention, with plant extracts emerging as promising environmentally friendly solutions. In this context, the surface extract of Salvia discolor, obtained using dichloromethane, was analyzed for its bioactive potential. Chemical profiling revealed a rich composition of terpenoids and flavonoids. The antimicrobial potential of the ground extract was evaluated against nine phytopathogenic fungi (Alternaria solani, Botrytis cinerea, Colletotrichum lindemuthianum, Fusarium solani, Fusarium oxysporum f. sp. lactucae race 1, Phoma betae, Phaeomoniella chlamydospora, Pythium dissotocum, and Stemphylium sp.), and two phytopathogenic bacteria (Clavibacter michiganesis subsp. michiganesis and Pectobacterium carotovorum subsp. carotovorum), selected from common pathogens of agricultural interest. Complete inhibition of P. chlamydospora at 1000 µg mL−1 and strong activity against P. dissotocum, F. solani and B. cinerea was observed, and low inhibition (<40%) against C. lindemuthianum and F. oxysporum f. sp. lactucae race 1. However, the extract showed promising results in the post-harvest protection of tomatoes against gray mold. Moderate antibacterial activity was seen against C. michiganensis subsp. michiganensis. These findings indicate that S. discolor extract has the potential to serve as an effective natural crop protection agent, though further optimization may be needed for broader application
In Vitro Micropropagation, Rooting and Acclimatization of Two Agastache Species (A. aurantiaca and A. mexicana)
No full textAgastache aurantiaca ‘Sunset Yellow’ and A. mexicana ‘Sangria’ are aromatic plants with edible flowers characterized with good flavors, nutritional values and pleasant aromas. The aim of this study was to establish a successful protocol to ensure fast shoot propagation, rooting and in vivo acclimatization to obtain many vigorous plants for edible flower production. Micropropagation was tested with an agarized Murashige and Skoog (MS) medium enriched with different 6-benzylamino purine (BAP) levels. In vitro rooting trials were carried out using a half-strength MS medium comparing the traditional jar method with an agarized medium and the temporary immersion system (TIS) bioreactor with a liquid medium. After acclimatization in a greenhouse, the survival of plants and their development were recorded. Microscopical analyses were performed on both in-jar and in-TIS leaves at rooting stages and compared with in vivo leaves. In both species, the greatest number of new shoots was noted at 2.22 µM and 3.33 µM of BAP. In TIS, rooting started earlier, resulting in larger plants with more roots and longer roots than in the jar substrate. Any anatomical difference was observed in leaves collected from the jar and TIS during the rooting stage. The best acclimatization performances were recorded in plants coming from the TIS bioreactor
Une interview avec Ananda Devi
No full textAn interview with Ananda Devi, which was conducted by Associate Professor Anna Czarnowus and Dr Marta Mamet-Michalkiewicz in 2019. The author talks about her own multilingualism, the novels where she dicusses violence, including sexual violence, her literary inspirations, the symbolism of her texts, female anger and feminism, the cultural meaning of cooking, and her novel 'The Living Days'.Wywiad z Anandą Devi przeprowadzony przez dr. hab. Annę Czarnowus i dr. Martę Mamet-Michalkiewicz z Uniwersytetu Śląskiego w 2019 roku. W wywiadzie autorka opowiada o swojej wielojęzyczności, powieściach, w których opisuje przemoc, również seksualną, swoich inspiracjach pisarskich, symbolice w swoich tekstach, kobiecym gniewie i feminizmie, kulturowym znaczeniu gotowania oraz powieści 'Les jours vivants'
Ananda Devi: a writer at the crossroads of cultures
No full textAnanda Devi is a francophone-Mauritian writer who lives (and creates) near Geneva. She is the author of numerous novels, short stories and volumes of poetry. Although the stories of her characters are fictitious, Devi’s texts are strongly inspired by her native island, its history and its ethnic, cultural and linguistic heterogeneity. In her novels, Devi employs numerous stylistic devices to empower individuals who are regarded as worse, excluded from the society due to their deficits
An Interview with Ananda Devi
No full textAn interview with Ananda Devi, which was conducted by Associate Professor Anna Czarnowus and Dr Marta Mamet-Michalkiewicz in 2019. The author talks about her own multilingualism, the novels where she dicusses violence, including sexual violence, her literary inspirations, the symbolism of her texts, female anger and feminism, the cultural meaning of cooking, and her novel \u27The Living Days\u27.Wywiad z Anandą Devi przeprowadzony przez dr. hab. Annę Czarnowus i dr. Martę Mamet-Michalkiewicz z Uniwersytetu Śląskiego w 2019 roku. W wywiadzie autorka opowiada o swojej wielojęzyczności, powieściach, w których opisuje przemoc, również seksualną, swoich inspiracjach pisarskich, symbolice w swoich tekstach, kobiecym gniewie i feminizmie, kulturowym znaczeniu gotowania oraz powieści \u27Les jours vivants\u27
Alpinist adaptive potential and the dynamics of adaptation in Janusz Klarner’s „Nanda Devi”
No full textWyprawa alpinistów na Nanda Devi była pierwszą polską pomyślnie zakończoną wędrówką w Himalajach. Nanda Devi była bardzo trudnym wyzwaniem dla polskiej ekipy, ale po wielu niebezpiecznych sytuacjach w końcu osiągnęli szczyt. W kolejnym kroku alpiniści chcieli zdobyć szczyt Tirsuli. Niestety, dwóch ekspedytorów zostało zasypanych lawiną na zboczach lodowca. Janusz Klarner (członek ekipy polskich alpinistów) po kilku latach napisał książkę Nanda Devi, opartą na jego prywatnym dzienniku ekspedycyjnym. Główną tezą artykułu jest to, że dotarcie do Nanda Devi było możliwe dzięki odpowiedniej szybkości adaptacji. Himalaje były zupełnie nieznanym miejscem dla polskich alpinistów. Okoliczności wymagały adaptacji do nowych, wymagających warunków. W artykule autor analizuje te adaptacje. Niektóre z nich miały wymiar symboliczny, inne: kulturowy, techniczny oraz aksjologiczny. Korzystając z ustaleń Deleuze'a z Bergsonizmu, autor uznaje, że zdolność do odpowiednio dynamicznej adaptacji jest wynikiem odpowiedniego uporządkowania występującego w danym momencie. Podsumowując, autor rozważa różne powiązania wzorców kulturowych, przyczynowości osobistej i względów środowiskowychAlpinist expedition to the Nanda Devi was the first Polish successfully ended hiking in the Himalaya. Nanda Devi was a very tough challenge for Polish team but after many dangerous situations they finally reached the peak. As a next step alpinists wanted to reach Tirsuli peak. Unluckily, two of the expeditors were buried in an avalanche on the slopes of a glacier. Janusz Klarner (the member of the Polish alpinists team) after few years wrote a book Nanda Devi which is based on his private expedition journal. The main thesis of the article is that reaching Nanda Devi was possible by the accurate speed of adaptation. The Himalaya was a completely different and unknown place for Polish alpinists. Alpinists were forced to various adaptations in many different situations. In the article author analyses emerging changes and adaptations. Among them are symbolic, cultural, technical and axiological adaptations. Using Deleuze's findings from Bergsonizm, the author recognizes that the capacity for appropriately dynamic adaptation is the result of an appropriate arrangement occurring at a point in time. To sum up, an author considers various connections between cultural patterns, personal causality and environmental considerations
Ananda Devi et certains de l’exil
No full textInspired by Devi’s Ceux du large (2017) and by authors connected to her, a performance has been created by the author, who was to conduct an oral creative workshop among whose participants were young immigrants. Trying to take into account both dimensions of such an artistic but also human experience, the text points out the links between Ananda Devi’s words and the young immigrants’ ones, and also the influence of having read them on the way to lead the workshop. But, above all, it shows how such a poetic writing is necessary not to reduce migration to a simple and measurable fact.Inspirée par des pages de Ceux du large (Ananda Devi, 2017) et des pages d’autres auteurs avec lesquels Ananda Devi est en lien, une performance été faite par un artiste-chercheur devant aussi animer un atelier de création sonore et à la même période. Parmi les participants se trouvaient de jeunes migrants. Essayant de prendre en compte toutes les dimensions d’une telle expérience aussi bien humaine qu’artistique, le texte fait apparaître les liens entre les mots d’Ananda Devi et ceux des jeunes migrants, et aussi l’influence de les avoir lus sur la façon de conduire l’atelier. Mais, par-dessus tout, il s’agit de montrer combien une telle écriture poétique est nécessaire pour ne pas réduire la migration à un simple fait mesurable
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