Search results for "PLANT"
showing 10 items of 11944 documents
The importance of phytoplankton production for carbon budgets in a semiarid floodplain wetland
2011
Phytoplankton production (PP) in wetlands is not measured as often as that of macrophytes. A three year-study during a period of sustained high flooding was undertaken in a central Spanish floodplain wetland (Las Tablas de Daimiel National Park) to determine net PP, its spatial heterogeneity and controlling factors, and compare it with primary production in macrophyte communities. This enabled us to estimate carbon budgets for each community. All PP variables showed high spatial and temporal variability among sites, resulting in low coherence even when flooding connected all sites. Net PP corresponded to 25- 36% of submerged plant production and 3-10% of helophyte production. Net PP was con…
Educación para la sostenibilidad y educación ambiental
2010
En este trabajo se analizan algunos de los obstáculos que están dificultando la implicación de diferentes sectores sociales en la adopción de las medidas necesarias para hacer frente a la actual situación de emergencia planetaria. En particular, analizamos la supuesta confrontación entre educación ambiental y educación para la sostenibilidad. Intentaremos mostrar que no existen razones para dicho antagonismo, sino que responde a malentendidos que es urgente deshacer, porque entorpecen la necesaria convergencia de esfuerzos para lograr una formación ciudadana que haga comprender la gravedad de la situación y prepare para participar en la toma de decisiones. Dans cet article nous analysons qu…
Chemical Composition of the Essential Oil of Bupleurum Fontanesii (Apiaceae) Growing Wild in Sicily and its Activity on Microorganisms Affecting Hist…
2016
Hydrodistillation of the flowers (BpFl) of and fruits (BpFr) of Bupleurum fontanesii Guss. ex Caruel gave two oils that were analyzed by GC and GC-MS. The main components were α-elemol (16.7%), caryophyllene oxide (16.4%) and heptacosane (15.9%) in BpFl, and spathulenol (16.8%), caryophylladienol I (13.2%) and α-elemol (12.8%) in BpFr. A good antimicrobial activity against several microorganisms, including Bacillus subtilis, Staphylococcus aureus, Fusarium oxysporum and Aspergillus niger, all infesting historical art craft, was also determined.
Chemical composition and biological activity of the essential oil of Ballota hispanica (L.) Benth. growing wild in Sicily
2015
Ballota L. comprises several relevant species largely used for their excellent therapeutic properties. Ballota hispanica (L.) Benth. is widely used in herbal medicine, and it is sold in herbalist shops for its sedative and antispasmodic properties. Considering its traditional medicinal use and the lack of scientific studies on the volatile components of this species as well as on its biological activities, in this study the chemical composition of the essential oil from aerial parts of B. hispanica, collected in Sicily, was evaluated by gas chromatography and gas chromatographyâmass spectrometry. α-Elemol was the most abundant component of the oil (10.9%), followed by α-ylangene (8.5%),…
Kognitiivisen suorituskyvyn tehostaminen teknologian avulla
2014
Renko, Roni Kognitiivisen suorituskyvyn tehostaminen teknologian avulla Jyväskylä: Jyväskylän yliopisto, 2014, 25 s. Tietojärjestelmätiede, Kandidaatin tutkielma Ohjaaja: Moilanen, Panu Ihmisen kognitiiviselta suorituskyvyltä vaaditaan yhä enemmän nykyaikaisessa tietoyhteiskunnassa ja kognitiivisen kuormituksen kasvu vaikuttaa jo ihmisen evoluutioon. Suorituskykyä on kuitenkin mahdollista tehostaa normaalien rajoitusten yli muun muassa lisäämällä teknologiaa esimerkiksi ympäristöön tai suoraan ihmiskehoon. Tässä tutkielmassa pyritään selvittämään, mitä teknologioita voidaan käyttää kognitiivisen suorituskyvyn tehostamiseen ja mitä haasteita niiden yleistymiseen liittyy. Tutkielmassa kogniti…
Sammlung offizineller Pflanzen
1828
Izdevums bez titullapas, autors-ilustrators A. Henry uzrādīts tikai uz grāmatas iesējuma muguriņas. Augu nosaukumi pie attēliem doti tikai latīņu valodā.
Augājs kā pilsētvides indikators Daugavpilī
2014
Šajā promocijas darbā ir apkopoti 2006.-2013. gadā veikto pētījumu rezultāti, kuros ir analizēta vides pārveidotības pakāpe Daugavpilī. Pētījumā tiek izmantotas trīs dažādu indikatoru grupas – neofītās vaskulārās augu sugas, epifītie ķērpji un priežu miza. Neofītās augu sugas inventarizētas visos 344 pilsētas kvadrātos, lihenoindikācijas dati iegūti no 82 kvadrātiem, metālu saturs priežu mizās noteikts 50 paraugvietās. Iegūtie rezultāti liecina, ka augstākās Daugavpilī pētīto ķīmisko elementu koncentrācijas priežu mizā konstatētas industriālo objektu tuvumā, lihenoindikācijas zemākie rādītāji saistāmi ar pilsētas centrālo daļu, ko raksturo blīvs ceļu tīkls un intensīva satiksme, kā arī priv…
The chemical composition of the aerial parts essential oil of Achillea cretica L. (Asteraceae) growing wild in Crete (Greece)
2022
Achillea cretica (L.) (Asteraceae) is a suffruticosa camefite plant, mainly distributed in Crete, Aegean Islands, and eastern Mediterranean area. In the present study, the chemical composition of the essential oil from aerial parts of a not previously investigated accession of Achillea cretica, collected in Crete, was analysed by GC-MS. The results showed the presence of large quantity of α-bisabolol (53.88%) followed by the related compound α-bisabolol-oxide (2.76%), and spathulenol (5.94%). Based on the composition of the essential oils of all the other Achillea taxa, several consideration have been carried out.
The chemical composition of the aerial parts essential oil of Ferulago nodosa (L.) Boiss. (Apiaceae) growing wild in Crete (Greece)
2023
Ferulago nodosa (L.) Boiss. (Apiaceae) is a species occurring in the Balkan-Tyrrhenian area being present in Crete, Greece, Albania, and probably in Macedonia. Although the western disjointed population of Sicily has been classified as an endemic sub-species, F. nodosa subsp. geniculata (Guss.) Troia & Raimondo, its official acceptance is quite controversial. In order to verify the existence of two different sub-species, we investigated the chemical composition of the essential oil of F. nodosa, collected in Crete (Greece), not previously reported, and we compared it with the previously oil compositions reported in literature. Main constituents of the Cretan accessions of F. nodosa were…
Characterization and antimicrobial activity of the volatile components of the flowers of Magydaris tomentosa (Desf.) DC. collected in Sicily and Alge…
2014
The essential oils of the flowers of Magydaris tomentosa (Desf.) DC. (Apiaceae) collected in Sicily (MSi) and Algeria (MAl), respectively, were obtained by hydrodistillation, and their compositions were analysed. The analyses allowed the identification and quantification of 23 components in MSi and 60 compounds in MAl, respectively, showing a very different profile in the composition of the two populations. The main components of MSi were cembrene (28.2%), α-springene (17.5%) and β-springene (14.8%), also present in MAl but in lesser amount (0.4%, 1.8% and 0.9%, respectively), whereas the principal constituents of MAl were (E)-nerolidol (35.4%), α-costol (13.3%) and β-costol (6.8%). Both MS…