Search results for " Luc"
showing 10 items of 195 documents
Cuticular hydrocarbon profiles differ between ant body parts: implications for communication and our understanding of CHC diffusion.
2020
Abstract Insect cuticular hydrocarbons (CHCs) serve as communication signals and protect against desiccation. They form complex blends of up to 150 different compounds. Due to differences in molecular packing, CHC classes differ in melting point. Communication is especially important in social insects like ants, which use CHCs to communicate within the colony and to recognize nestmates. Nestmate recognition models often assume a homogenous colony odor, where CHCs are collected, mixed, and redistributed in the postpharyngeal gland (PPG). Via diffusion, recognition cues should evenly spread over the body surface. Hence, CHC composition should be similar across body parts and in the PPG. To te…
Typification of eight names in Hieracium (Asteraceae)
2012
Eight names in Hieracium (H. atrovirens Froel., H. crinitum Sm., H. lucidum Guss., H. pallidum Biv., H. racemosum subsp. todaroanum Zahn, H. siculum Guss., H. siculum var. minus Guss., H. symphytifolium Froel.), the descriptions of which are based totally or in part on Sicilian material, are typified. Hieracium racemosum subsp. todaroanum is treated as a synonym of H. crinitum, and H. siculum and H. siculum var. minus are treated as synonyms of H. symphytifolium. Hieracium atrovirens is recognized as a subspecies of H. murorum L. (H. murorum subsp. atrovirens (Froel.) Raimondo & Di Grist.).
Fish community structure in mesotrophic and eutrophic lakes of southern Finland: the relative abundances of percids and cyprinids along a trophic gra…
2002
In 36 south Finnish lakes, the number of species, as well as the cyprinids:percids ratio, was dependent, not only on total phosphorus (TP), but also on lake size. Total fish biomass and cyprinid biomass increased along the TP gradient, whereas the dependence of percid biomass was less evident. Perch Perca fluviatilis and roach Rutilus rutilus strongly dominated mesotrophic lakes; in eutrophic lakes the proportion of other cyprinids and percids, such as white bream Blicca bjoerkna, bream Abramis brama, pikeperch Stizostedion lucioperca and ruffe Gymnocephalus cernuus, increased. Perch biomass was weakly related to abiotic factors but depended on roach biomass. Lake size and fish species comp…
Effects of starvation on survival, cannibalism, body mass, and intestinal protozoan profile in the subterranean termite Reticulitermes lucifugus
2019
Scarcity or inadequate nutrition can affect biological and behavioural aspects of subterranean termites and their intestinal protozoan profile. The aim of this study was to investigate changes in survival, cannibalism, body mass, and protist community structure of Reticulitermes lucifugus Rossi subspecies “Sicily” following starvation to provide basic knowledge for the development of more specific studies on a possible survival strategy under stressful conditions. In nature, this termite consumes many food sources and its feeding activity is continuous during the year. In a 35-day laboratory experiment, groups of 50 termites (worker/soldier ratio 49:1) were subjected to two diets, starvatio…
Parvovirus B19V Nonstructural Protein NS1 Induces Double-Stranded Deoxyribonucleic Acid Autoantibodies and End-Organ Damage in Nonautoimmune Mice
2018
Abstract Background Viral infection is implicated in development of autoimmunity. Parvovirus B19 (B19V) nonstructural protein, NS1, a helicase, covalently modifies self double-stranded deoxyribonucleic acid (dsDNA) and induces apoptosis. This study tested whether resulting apoptotic bodies (ApoBods) containing virally modified dsDNA could induce autoimmunity in an animal model. Methods BALB/c mice were inoculated with (1) pristane-induced, (2) B19V NS1-induced, or (3) staurosporine-induced ApoBods. Serum was tested for dsDNA autoantibodies by Crithidia luciliae staining and enzyme-linked immunosorbent assay. Brain, heart, liver, and kidney pathology was examined. Deposition of self-antigens…
Use of Ganoderma lucidum (Ganodermataceae, Basidiomycota) as Radioprotector
2020
For millennia, naturopaths and physicians have used Ganoderma lucidum (reishi mushroom) for its diverse therapeutic properties, as recorded in the oldest Chinese herbal encyclopedia. Indeed, a radioprotective effect has been reported in the isolated components of its extracts. A systematic review and meta-analyses (PRISMA) was conducted in March 2020, searching databases including PubMed, Scopus, Embase, and Google Scholar, along with Clinical Trials. The inclusion criteria were ex vivo, in vitro, and in vivo studies, with full texts in English, conducted to determine the radioprotective benefits of G. lucidum, or reports in which ionizing radiation was used. From a total number of 1109 rec…
Täpläravun (Pacifastacus leniusculus) vaikutus särjen (Rutilus rutilus) loisiin Päijänteellä
2013
Täplärapu (Pacifastacus leniusculus) on Suomen vesistöissä verrattain uusi vieraslaji, joka leviää sekä suunnitelluin istutuksin että suunnittelematta uusille alueille. Täplärapu on alun perin tuotu Suomeen korvaamaan rapuruton turmelemia jokirapukantoja, mutta sitä on istutettu myös alueille, joissa ei alkuperäistä rapukantaa ole aiemmin ollut. Kotoperäiseen jokirapuun verrattuna täplärapu on paitsi vastustuskykyisempi rapurutolle, myös nopeampi kasvamaan ja lisääntymään. Täplärapu kasvaa jokirapua suuremmaksi ja on luonteeltaan aggressiivisempi. Vieraslajina täplärapu voi muuttaa uuden elinympäristön rakennetta ja toimintaa. Täplärapu käyttää ravintonaan muun muassa selkärangattomia pohja…
CAN HELICICULTURE ACT AS A TOOL FOR EDIBLE LAND SNAILS’ NATURAL POPULATIONS’ MANAGEMENT IN ROMANIA?
2013
ABSTRACT Edible land snails are intensively exploited and the management of natural populations is a complex issue due the variety of factors involved. Two species of the genus Helix are present in our country, Helix pomatia and Helix lucorum, both of them collected since 1956. Although current legislation regulates the exploited amount and the dimension of collected snails, the exploitable amount is not assessed using appropriate ecological studies. The farming of edible snails has evolved in Romania especially during the period 2004-2008, the first farms being financed by the SAPARD Project. The inappropriate documentation on the matter of snail farming had lead to a quick failure of this…
Recatalogación de Vella lucentina M.B. Crespo (Cruciferae) según las categorías UICN (2001)
2006
Vella lucentina es un endemismo del centro de la provincia de Alicante que habita en matorrales esteparios calcícolas, bajo bioclima termomediterráneo semiárido. Su fragmentada área de ocupación apenas alcanza tres kilómetros cuadrados y se encuentra sometida a una fuerte presión antrópica, por lo que hasta el momento se tiene como especie “vulnerable” (VU), según las categorías de amenaza de la UICN. Sin embargo, últimamente se ha constatado una merma en la calidad de su hábitat y la desaparición de algunos núcleos poblacionales secundarios, a causa a actividades urbanísticas que amenazan a las restantes poblaciones. Los trabajos que se vienen realizando en los últimos meses sobre la biolo…
Persistenza della thòlos nell’architettura contemporanea
2020
La thòlos è una costruzione che può essere assunta come un inizio dell’architettura e che definisce principi che stanno oltre la storia e l’archeologia: rappresenta un archetipo legato al mondo litico, proveniente dall’oriente e diffuso sin dall’età greco-arcaica in tutto il Mediterraneo. Custodisce memorie di epoche mitiche e forme che affiorano con continuità nell’architettura, attraversa la storia e persiste nella modernità soprattutto negli spazi di culto e celebrativi. Lo spazio della thòlos consente di riprendere nel progetto contemporaneo alcuni temi i cui esiti conducono ad una architettura che è in antitesi alla continuità visiva interno-esterno e all’assenza di confini, che all’in…