Search results for "Eucalypt"
showing 10 items of 62 documents
A Simple Fusion Method for Image Time Series Based on the Estimation of Image Temporal Validity
2015
High-spatial-resolution satellites usually have the constraint of a low temporal frequency, which leads to long periods without information in cloudy areas. Furthermore, low-spatial-resolution satellites have higher revisit cycles. Combining information from high- and low- spatial-resolution satellites is thought a key factor for studies that require dense time series of high-resolution images, e.g., crop monitoring. There are several fusion methods in the bibliography, but they are time-consuming and complicated to implement. Moreover, the local evaluation of the fused images is rarely analyzed. In this paper, we present a simple and fast fusion method based on a weighted average of two in…
Cytotoxic activity of secondary metabolites derived from Artemisia annua L. towards cancer cells in comparison to its designated active constituent a…
2010
Artemisia annua L. (sweet wormwood, qinhao) has traditionally been used in Chinese medicine. The isolation of artemisinin from Artemisia annua and its worldwide accepted application in malaria therapy is one of the showcase success stories of phytomedicine during the past decades. Artemisinin-type compounds are also active towards other protozoal or viral diseases as well as cancer cells in vitro and in vivo. Nowadays, Artemisia annua tea is used as a self-reliant treatment in developing countries. The unsupervised use of Artemisia annua tea has been criticized to foster the development of artemisinin resistance in malaria and cancer due to insufficient artemisinin amounts in the plant as c…
Effects of Kaolin on Ophelimus maskelli (Hymenoptera: Eulophidae) in Laboratory and Nursery Experiments
2011
Although recent research has demonstrated that clays provide satisfactory control of some agricultural insect pests, the effect of clays on gall wasps that damage forest trees has not been previously reported. The aim of the current study is to evaluate the effectiveness of the clay kaolin in the laboratory and in the field in reducing the damage caused by the eulophid Ophelimus maskelli (Ashmead) on seedlings of eucalyptus (Eucalyptus L'Hér.) species. In the laboratory, kaolin + wetting agent significantly reduced the percentage of infested leaves and the number of galls per leaf. In the nursery, gall number per leaf was not correlated with leaf area with kaolin + wetting agent but was rel…
Phytotoxic effects of Lantana camara, Eucalyptus camaldulensis and Eriocephalus africanus essential oils in weeds of Mediterranean summer crops
2009
Abstract The essential oil composition of Lantana camara , Eucalyptus camaldulensis and Eriocephalus africanus was analyzed by means of GC and GC–MS and bioassayed in order to determine their activity against Amaranthus hybridus and Portulaca oleracea . E. camaldulensis essential oil, with spathulenol as the main compound, was the most effective, completely inhibiting germination and seedling growth on both weeds. The essential oil of E. africanus , rich in artemisia ketone, showed activity similar to that of E. camaldulensis on A. hybridus , but it was not so effective against P. oleracea , and L. camara essential oil, with high percentages in sesquiterpene hydrocarbons, also showed higher…
Economic assessment of Eucalyptus (spp.) for biomass production as alternative crop in Southern Italy
2015
The increase in energy prices and the stagnation of sales prices of the main agricultural commodities required a rethinking of farm production strategies. Since during the last years, thanks to a series of policies aimed at promoting renewable sources it has been a rapid diffusion of lignocellulosic biomass species, this paper aimed at evaluating the economic feasibility of the introduction of eucalyptus (Eucalyptus spp.) as energy crop for farmers of Southern Italy, by comparing it with traditional crop rotations. In particular, economic analysis has been carried out in a representative case study located in the Sicilian hilly hinterland where, in 2013, it has been built a biomass plant fo…
Eikaliptu saturošo uztura bagātinātāju un medikamentu aprite SIA "Baltfarm" aptieku tīklā un ārstniecisko īpašību novērtējums
2015
Šajā darbā tika pētīta eikaliptu saturošo zāļu un uztura bagātinātāju aprite SIA “Baltfarm” aptieku tīklā, kā arī tika novērtētas eikalipta aktīvo vielu ārstnieciskās īpašības. Par pētījuma metodi tika izvēlēta aptiekas klientu anketēšana un eikalipta saturošu medikamentu aprites analīze par 2013. un 2014.gadu. Tika noskaidrots, ka eikaliptu saturošus preparātus lieto 46% (n=25) aptaujāto. Visbiežāk tos izmanto klepus ārstēšanai (28%, n=20). Vispieprasītākie eikaliptu saturošie preparāti ir “Inhalipts” aerosols kaklam (n=4246, 32%) un deguma pilieni “Pinosol” (n=2865, 29%). Tika novērots, ka zāles un uztura bagātinātāji, kuros eikalipts ir galvenā aktīvā viela, ir maz pieprasīti un tie nepā…
Influence of torrefaction pretreatment on the pyrolysis of Eucalyptus clone: A study on kinetics, reaction mechanism and heat flow
2016
Abstract The adverse nature of biomass requires specific pretreatment processes to better utilize it in bioenergy applications, and torrefaction is one of the most recognized thermal pretreatment methods. In this regard, we studied the effect of torrefaction pretreatment on kinetics, reaction mechanism and heat flow during the pyrolysis of biomass by making a comparative analysis between the pyrolysis of dried and torrefied Eucalyptus wood. Torrefied biomass was produced at three temperatures, namely 250, 275 and 300 °C. Pyrolysis was performed at 700 °C. The char yield during pyrolysis increased from 22.39 percent to 36.34 percent when the torrefaction temperature was increased from 250 to…
Effetti dell’applicazione in post emergenza degli oli essenziali di eucalipto sulle piante infestanti e sulla comunità microbica del suolo
2017
L'uso diffuso di erbicidi sintetici ha un impatto negativo sulla salute umana e sull’ecosistema. Per il superamento di questi problemi, si stanno valutando soluzioni alternative per ridurre l’utilizzo di erbicidi sintetici. Molti studi hanno dimostrato che gli oli essenziali (EO) estratti da alcune piante hanno un'attività erbicida. Gli EO, sono costituiti da composti organici volatili e caratterizzati da un forte odore; vengono utilizzati dalle industrie cosmetiche, farmaceutiche e alimentari in quanto sono considerati composti sicuri per l’uomo, gli animali e l'ambiente. Diversi studi hanno dimostrato che gli EO estratti dalle foglie di eucalipto hanno effetti antimicrobici, antivirali, f…
Sensory analysis integrated by palynological and physicochemical determinations plays a key role in differentiating unifloral honeys of similar botan…
2015
Summary Myrtaceae honeys produced in Sierra Morena (southern Spain, Andalusia) are obtained from both Eucalyptus camaldulensis and Myrtus communis, and honeys can be easily confused when classified as they come from the same botanical family. The characterisation was intended on the basis of their physicochemical, sensory and palynological properties. Cluster analysis (CA) and principal component analysis (PCA) allowed us to make a distinction between two honey profiles. The first one corresponds to the European sensory profile described for Eucalyptus unifloral honeys. The second profile, which sensory characteristics are absolutely different, has not been previously described. Classificat…
Quali sono le specie arboree a rapido accrescimento per la Sicilia?
2018
A dispetto dell’uso diffuso massiccio della locuzione “specie a rapido accrescimento”, riferita a specie utilizzate per la produzione di biomassa, mancano ad oggi riferimenti certi che servano a definire le suddette specie. Si consideri, inoltre, che la locuzione è utilizzata, oltre che in articoli e testi tecnici, anche in testi che hanno carattere applicativo e/o costituiscono norme di riferimento come, ad esempio, le misure dei Piani di Sviluppo Rurale. Una definizione ormai datata della FAO (1967), riferita ai paesi in via di sviluppo, riporta: “Fast-growing species are considered as those capable of a mean annual increment of at least 10 cubic meters per hectare”. Nel frattempo, da qua…