Search results for "PELT"
showing 10 items of 30 documents
First report of the bordered straw, Heliothis peltigera, οn sunflower in Greece
2017
Τον Ιούνιο 2015, καταγράφηκαν προσβολές καλλιeργeιών ηλιάνθου από το έντομο Heliothis peltigera (Lepidoptera: Noctuidae) σe αγροτικές πeριοχές της Πeριφeρeιακής Eνότητας Δράμας. Παρατηρήθηκαν διαβρώσeις στα φύλλα και στους οφθαλμούς από τις προνύμφeς του eντόμου, κυρίως στα προανθικά στάδια ανάπτυξης. Οι προσβολές παρατηρήθηκαν στο 80% των αγρών που eπισκοπήθηκαν, ωστόσο το eπίπeδο προσβολής των φυτών ήταν χαμηλό (<5%) και δeν διαπιστώθηκe πρόκληση οικονομικής ζημίας στις καλλιέργeιeς. Το H. peltigera έχeι αναφeρθeί από τη Νότια και Κeντρική Eυρώπη, τον Καναδά, τη Μέση Ανατολή και την Αφρική να προσβάλλeι διάφορους ξeνιστές. Προσβολές σe καλλιέργeιeς ηλιάνθου έχουν αναφeρθeί από την Ινδία, …
Thermoelectric Heat Exchange and Growth Regulation in a Continuous Yeast Culture
2018
We have designed a thermoelectric heat exchanger (TEHE) for microbial fermentations that is able to produce electric power from a microbial continuous culture using the intrinsic heat generated by microbial growth. While the TEHE was connected, the system proved able to stably self-maintain both the temperature and the optical density of the culture. This paves the way toward a more sustainable operation of microbial fermentations, in which energy could be saved by converting part of the metabolic heat into usable electric power.
Effects of landscape composition on hoverflies (Diptera: Syrphidae) in mass-flowering crop fields within forest-dominated landscapes
2022
Agricultural intensification has led to structurally simplified landscapes with reduced and fragmented resources for farmland insects. However, studies on the effects of landscape composition on farmland insects have mainly been performed in areas dominated by open arable land and semi-natural grasslands, while studies from forest-dominated landscapes are scarce. This research examined the effects of landscape composition on hoverfly species richness and abundance in arable land in boreal forest-dominated landscapes. Hoverflies were sampled in 22 mass-flowering caraway (Carum carvi) fields in Central Finland using pan traps. The effects of landscape composition on species richness and abund…
Kivipelto
A new species of the genus Cyclopelta (Hemiptera: Dinidoridae) from Thailand, with a key to its Oriental species
2013
Cyclopelta gibbosasp. nov., a new species of dinidorid bug is described from Thailand and compared with Cyclopelta obscura. It is the ninth Oriental species of the genus, and the fourth known species from Thailand. A key to all the Oriental species of the genus Cyclopelta is also provided. The type specimens are deposited with the Smithsonian National Museum of Natural History, Washington, USA, and the Department of Biosystematics, Opole University, Poland.
Morphological determination of the phototrophic community composition of biological soil crusts in coastal sand dunes in northern Germany
2022
This dataset comprises the microbial community composition of biological soil crusts in north-German sand dunes. For this we obtained enrichment cultures of phototrophic microorganisms, by placing fragments of biocrusts of the same Petri dishes as used for sequencing, in Petri dishes with Bold Basal (1N BBM) agarized medium (Bischoff and Bold 1963). Cultures were grown under standard laboratory conditions: with a 12-hour alteration of light and dark phases and irradiation of 25 μmol photons m-2 s-1 at a temperature 20 ± 5 ºС. Microscopic study of these raw cultures began in the third week of cultivation. Morphological examinations were performed using Olympus BX53 light microscope with Noma…
On the use of a laboratory-scale Pelton wheel water turbine in renewable energy education
2008
Abstract A laboratory-scale Pelton turbine for hydroelectric generation has been constructed and used in the educational curriculum of The Renewable Energy Programme at the University of Jyvaskyla. The construction of the Pelton turbine, the experimental apparatus and the measurement procedure are described. The apparatus is simple to make and uses inexpensive components, most of which can be found in standard science laboratories. From the experimental results, the turbine was found to have a maximum mechanical efficiency of 0.47 ± 0.02 for a water flow rate of 0.17 l / s . The Pelton turbine and apparatus demonstrate the principles of hydropower and are well suited for education in renewa…
In vitro and in vivo effects of Ranunculus peltatus subsp. baudotii methanol extract on models of eicosanoid production and contact dermatitis
2007
Ranunculus (Crowfoot) species are numerous and they are all reputed to be counter-irritants and are used in several topical conditions. In order to study the pharmacological mechanisms of action underlying this popular use, a methanol extract of Ranunculus peltatus was tested in vitro in various assays involving eicosanoid and human elastase release by intact cells as well as in vivo, with models of delayed-type hypersensitivity (DTH) contact dermatitis. The extract proved to be a selective inhibitor of the cyclooxygenase-1 pathway, producing the total inhibition of 12-(S)-HHTrE release at 200 microg/mL, while leaving both 5-lipoxygenase and 12-lipoxygenase activities unaffected at the same…
Restoration of two small Mediterranean lagoons: The dynamics of submerged macrophytes and factors that affect the success of revegetation
2013
Abstract Two small, shallow lagoons newly created from former rice fields in the Mediterranean coast (Albufera de Valencia Natural Park, Spain) were restored by planting several species of submerged macrophytes (Myriophyllum spicatum, Ceratophyllum demersum, Potamogeton spp., Zannichellia peltata and Ranunculus peltatus) in 2008. Charophytes also appeared spontaneously. M. spicatum was the species that dominated both lagoons and almost completely covered their surface. M. spicatum reached a high biomass and displayed a seasonal pattern, declining during the cold season and reappearing in the spring. No submerged vegetation was observed in the lagoons from 2011 onward. The major purpose of t…