1,721,046 research outputs found
Attività di ricerca e conservazione di specie endemiche dell’Appennino Centrale presso la Banca del Germoplasma del Parco nazionale della Majella (Majella Seed Bank).
No full textNumerical and Experimental Characterization of Wrist-Fingers Communication Link for RFID-based Finger Augmented Devices
No full textRadiofrequency-Identification Finger-Augmented Devices (R-FAD) identify a particular wearable technology suitable to turn the human fingers into enhanced sensing surfaces to restore lost senses in impaired people as well as to augment the existing ones. The communication channel of R-FAD, involving a reader’s antenna placed onto the wrist and tag antennas stuck onto the fingers, is here characterized in the UHF RFID band by means of both numerical simulations, accounting for several options of the system, and an experimental campaign with volunteers asked to reproduce natural gestures of the hands. The study identifies the most appropriate placement of the devices and, above all, it quantifies the robustness of the link against the human variability. The channel follows a Lognormal Cumulative probability law indicating that the minimum required power to establish a reliable RFID link is 18-27 dBm depending on the chip sensitivity. Measurements finally revealed a remarkable correlation of the minimum required power from the reader with the volume of the hand
Seed germination reports for Centaurea tenoreana (Asteraceae)
Full text linkThis work aims to study the seed germination capacity for Centaurea tenoreana (Asteraceae). This species is narrowly endemic to the territory of the Maiella National Park, in Abruzzo (Italy). The species did not show dormancy, and excellent germination results were obtained at constant temperatures both in the dark and in the light. The highest
germination value (98.95%) was obtained by sowing the cypselas on 1% agar and then incubating at a constant temperature of 15°C with a light-dark photoperiod of 12/12 hours.
The records of the first germination are provided for the taxon investigated
Aspetti sulla morfologia e test di germinabilità per la conservazione di Bubon macedonicum (L.) subsp. macedonicum specie rara della flora italiana.
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Seed germination and conservation of two endemic species from Central Apennines (Italy)
Full text linkThe Mediterranean mountains are one of the most threatened ecosystems in Europe, and endemic species are a significant feature of this environment.
The definition of germination protocols for endemic, rare or threatened species is an important step for their conservation. The aim of this work
was to analyze seed germination of Phyllolepidum rupestre Ten. Trinajstić and Crepis magellensis F. Conti & Uzunov, two endemic species growing
in small populations in the Majella Nation Park (Central Apennines, Italy). The effects of temperature (5, 10, 15, 20, 25, 25/10 and 20/10°C), irradiance
and gibberellic acid (250 and 500 ppm) on seeds germination were considered. A protocol for the in situ reintroduction was also developed.
The results highlight a significant effect of temperature on seed germination. In particular, seed germination for P. rupestre and C. magellensis was
70.58 ± 3.75 % and 97.30 ± 3.13% at 20°C, respectively. These protocols can be used in reinforcement projects for wild populations
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