1,721,036 research outputs found
Germination data of four Mediterranean species of coastal sand dunes
Full text linkThe present work gathers new germination assays of four Mediterranean species of coastal sand dunes. The studied species are: Anthemis maritima L. subsp. maritima, Crucianella maritima L., Eryngium maritimum L. and Thinopyrum junceum (L.) Á.Löve. Seeds were collected at the time of natural seed dispersal in two sites in the South of Sardinia. The germination tests were carried out at the Sardinian Germplasm Bank (BG-SAR). Our results show a high germination capability and germination rate for the tested plant species
Urbanisation processes in landscape protected areas in Sardinia
No full textLandscape protection measures apply to a considerable part of territory
in the Island of Sardinia, where local valuable landscapes were deemed
subject to strong anthropogenic pressure.
Within this context, aim of the study presented in this paper is to supply
quantitative evidence for a preliminary assessment of past and current urbanization
processes in protected areas as support for revision and further
development of existing protection strategies and measures within the
framework of the Regional Landscape Plan and its update process currently
under development.
This contribution focuses specifically on landscape protection areas as
defined by the National Law no. 1497/1939.
The Analysis are based on the spatial data of the new Sardinian Regional
SDI demonstrating the added-value of the availability of harmonized digital
spatial data as support for spatial analysis and policy support
SYNTHESIS OF SOME 1-(3-HYDROXY-4-METHOXYBENZYL)-2-ALKYL-6,7-METHYLENEDIOXY-1,2,3,4-TETRAHY DROISOQUINOLINES AND THEIR BINDING AFFINITIES TO DA RECEPTOR SUBTYPES
No full textLesions of substantia nigra by kainic acid: effects on apomorphine-induced stereotyped behaviour
No full textFifteen days after bilateral lesions of the substantia nigra by local infusion of kainic acid (0.75 microgram) or after intranigral injection of vehicle, rats were administered 0.1, 0.25, 1.0 and 2.5 mg/kg s.c. of apomorphine and the stereotyped items (locomotion, sniffing and gnawing) were recorded on an event-recorder and motility was measured by a photocell apparatus. After low doses of apomorphine (0.1, 0.2 mg/kg), rats lesioned in the substantia nigra with kainic acid showed a degree of stimulation of motility and of sniffing similar to controls; on the other hand, in rats lesioned with kainic acid in the nigra, a dramatic reduction of gnawing and its replacement by sniffing was observed after administration of higher doses of apomorphine (1.0, 2.5 mg/kg). Bilateral infusion of kainic acid (0.75 microgram) into the reticular information, 2.0 mm dorsal to the substantia nigra, had no effect on apomorphine-induced stereotyped behaviour. These results are in agreement with the concept that the substantia nigra, through non-DA pars reticulata neurons, mediates motor and behavioural syndromes of striatal origin
Cephalaria mediterranea (Viv.) Szabó - Schede per una Lista Rossa della Flora vascolare e crittogamica Italiana
No full textRole of substantia nigra pars reticulata neurons in the expression of neuroleptic-induced catalepsy
No full textBilateral kainate-induced lesions of the substantia nigra prevented or dramatically reduced the catalepsy produced by haloperidol. In contrast, infusion of 1 or 4 micrograms 6-OHDA in the medial forebrain bundle, which decreased striatal DA by 30% and 80% respectively, failed to affect or actually potentiated haloperidol catalepsy. Since intranigral kainate, in contrast to 6-OHDA, destroys pars reticulata neurons it appears that these neurons are essential for the expression of haloperidol-catalepsy
Irreversible neuronal damage after intrastriatal injection of colchicine.
No full textIntrastriatal injection of 2 or 4 mg of colchicine results in loss of striatal perikarya without damage of mielinated boundies of passage. Neurochemical markers of intrinsle and afferent striatal neurons are markedly reduced on the lesioned sid
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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