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931.
The evolution of cranial base and face in Cercopithecoidea and Hominoidea: Modularity and morphological integration 下载免费PDF全文
932.
Giovanni Sanesi Raffaele Lafortezza Pasquale A. Marziliano Alessandro Ragazzi Luigi Mariani 《Landscape and Ecological Engineering》2007,3(2):187-198
During the early part of the 1980s, a major project called Parco Nord was undertaken by the Lombardia Region to establish
forest resources within an industrial area located in the northern part of the city of Milan. Since 1983, more than 60 ha
of formerly industrial land has been converted into urban forest plantations, thus creating large patches of trees with the
potential to sustain a wide range of functions and services. This paper describes an integrative study aimed to assess the
current status of forest resources in Parco Nord. It focuses on the actions taken to determine whether forest resources significantly
changed their status 20 years after their establishment, considering historical field data and records of management practices.
Analyses have been conducted at both stand and tree level by collecting quantitative and qualitative parameters. Stand-level
analysis gave a quantitative estimation of the response of species to ecological conditions and management practices while
tree-level analysis provided evidence of species renovation after thinning operations. 相似文献
933.
Pasquale Gallo Michele Saviano Filomena Rossi Vincenzo Pavone Carlo Pedone Raffaele Ragone Paola Stiuso Giovanni Colonna 《Biopolymers》1995,36(3):273-281
Cyclophilin A, a peptidyl-prolyl cis–trans isomerase that catalyzes the otherwise slow isomerization of Xaa-Pro imidic bond, specifically binds the immunosuppressant cyclosporin A. Herein we reportevidence on binding of cyclolinopeptide A and its synthetic analogue, [Aib5,6-D -Ala8] cyclolinopeptide, to bovine cyclophilin A. Binding experiments were monitored by fluorescence. CD, and second-derivative spectroscopies, evidencing no remarkable rearrangement of protein structure organization. The possibility that cyclolinopeptide A could act as a substitute of cyclosporin A in the immunosuppression modulation is also briefly discussed. © 1995 John Wiley & Sons, Inc. 相似文献
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935.
G Costa A Trovato F Abate R De Pasquale E M Galati 《Bollettino della Società italiana di biologia sperimentale》1979,55(15):1492-1497
In ovariectomized rats treated with estradiol benzoate, the pre-treatment with bromocriptine or metergoline on increase of PRL secretion induced by some prostaglandins has been investigated. The PGs used were able to hinder the drop in PRL levels induced by metergoline, a blocker of 5-HT receptors, but not that produced by bromocriptine, a dopamine receptor agonist. Therefore it is possible to suppose that the PGs are involved in the monoaminergic hypothalamic regulation of the PRL secretion. 相似文献
936.
Valentina Pasquale Sergio Martinoia Michela Chiappalone 《Journal of computational neuroscience》2010,29(1-2):213-229
Dissociated networks of neurons typically exhibit bursting behavior, whose features are strongly influenced by the age of the culture, by chemical/electrical stimulation or by environmental conditions. To help the experimenter in identifying the changes possibly induced by specific protocols, we developed a self-adapting method for detecting both bursts and network bursts from electrophysiological activity recorded by means of micro-electrode arrays. The algorithm is based on the computation of the logarithmic inter-spike interval histogram and automatically detects the best threshold to distinguish between inter- and intra-burst inter-spike intervals for each recording channel of the array. An analogous procedure is followed for the detection of network bursts, looking for sequences of closely spaced single-channel bursts. We tested our algorithm on recordings of spontaneous as well as chemically stimulated activity, comparing its performance to other methods available in the literature. 相似文献
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938.
939.
Carlo Meloro Nilton Cáceres Francesco Carotenuto Federico Passaro Jonas Sponchiado Geruza Leal Melo Pasquale Raia 《Zoologischer Anzeiger》2014,253(4):345-359
Our aim is to identify ecomorphological adaptations in the skull shape of the South American howler monkeys (species of the genus Alouatta, Lacépède, 1799, Primates, Atelidae). Since Alouatta is relatively homogenous in feeding ecology, we expect skull shape variation to be relatively conservative across species. We used geometric morphometrics to quantify craniodental morphology in six species of Alouatta. Multivariate regression, two-block Partial Least Squares, and variation partitioning were used to test for the impact of taxonomy, sexual dimorphism, allometry, geography and climate on skull shape. We found morphological overlap among species and sexes, although some discrimination occurs between species living in seasonal environments as opposed to rain forest species. There was a negative latitudinal gradient in skull size across species, with size explaining 34% of total shape variance. Latitude and climate, though important, were secondary in explaining shape variance. Amazonian Alouatta are larger, have thinner molars, wide incisors, and proportionally larger neurocranium. Overall, the shape of southern species seem well adapted to cope with proportionally tougher food items, whereas Amazonian species seem better equipped to deal with a diet richer in fruits, as confirmed by independent field observations. The small size of Alouatta in the South is possibly linked to the effect of competition with the larger folivorous atelid Brachyteles. 相似文献
940.
The elongation factor G (EF-Gchl) and elongation factor Tu (EF-Tuchl) present in spinach chloroplasts become labelled when isolated chloroplasts are incubated in the light with radioactive methionine. EF-Gchl and EF-Tuchl account for approximately 0.04% and 0.2% respectively of the total radioactivity incorporated by isolated organelles. 相似文献