79 research outputs found
Characterization of red-fleshed pear accessions from Emilia-Romagna region
Germplasm collections represent a reservoir of traits and genes that might be used in breeding programs to cope with the evolving market demand. Some old pear accessions still cultivated in the Apennine Mountains in Italy possess a red flesh fruit. This paper reports the molecular analysis of 33 red-fleshed pear accessions, collected in different areas of the Emilia-Romagna region and genotyped with 18 simple sequence repeat (SSR) markers with the aim of improving germplasm conservation strategies for old red-fleshed pears and for supporting ongoing breeding programs. The molecular profiles revealed both cases of synonymy and homonymy and only 6 unique genotypes were identified. S-genotypes were also established in order to highlight the genetic relationships among these landraces. Four of the unique genotypes have been clustered based on pomological data
Monitoraggio ambientale mediante l'impiego di suoli e di muschi per le discariche di Rio Riazzone, Rio Vigne e Poiatica di Reggio Emilia
The purposes of this environmental monitoring was to estimate the concentrations of the elements (Al, As, Bi, Cd, Co, Cr, Cu, Fe, Hg, Mn, Mo, Ni, Pb, Sb, Ti, V, Zn, Pt and Rh) during two years in 15 stations in three landfills located in the hills of Reggio Emilia and to value the flows of element depositions (gram element/hectare area/year). In addition the origin of the element depositions was identified, discriminating between anthropogenic origin and soil-substrate origins. For more complete information, soils and mosses were also collected to know the level of concentration in a wide are around the landfills. The results obtained for the elements investigated using mosses and superficial soils did not amphasise any specific anomalies.JRC.H.6-Spatial data infrastructure
Pengendali Motor Induksi 1 Fasa Dengan Metode PWM Sinusoida Berbasis Mikrokontroler 68HC11
Pada pengendalian motor induksi yang dilakukan secara konvensional tidak diperoleh
pengaturan yang kontinyu dan linier, sehingga perlu dilakukan penelitian tentang pengendalian
motor induksi dengan teknik inverter. Penelitian ini bertujuan melakukan pengembangan dan
evaluasi unjuk kerja pengendalian motor induksi satu fasa dengan metode PWM sunusoida
berbasis mikrokontroler. Pengendalian menggunakan rangkaian jembatan inverter jenis PWMVSI
(DC-Link inverter) dengan teknik modulasi PWM menggunakan mikrokontroler 68HC11E9,
dan diharapkan dapat menggerakkan motor induksi pada kecepatan yang berbeda-beda. Pada
penelitian ini digunakan motor induksi satu fasa Z-406, 220 Volt, 50-60 Hz, 125W. Penelitian
dimulai dengan pembuatan perangkat keras berupa inverter menggunakan MOSFET sebagai
komponen pensaklaran dan diteruskan dengan menyusun rangkaian penggerak inverter satu
fasa. Pola sinyal PWM sinusoida dibentuk dengan teknik perhitungan lima modulasi PWM yang
berbeda. Dari pola gelombang tersebut dibuat program pembangkit pulsa PWM satu fasa dan
perangkat pendukungnya. Selanjutnya dilakukan pengamatan bentuk gelombang PWM
keluaran MCU, tegangan, arus keluaran inverter dan mengukur kecepatan putar motor untuk
lima indeks modulasi, yaitu (1), (0,81), (0,59), (0,37), dan (0,15). Hasil penelitian menunjukkan
bahwa pengaturan kecepatan putar motor induksi untuk frekuensi tetap 50 Hz dengan 5 indeks
modulasi berbeda dengan metode PWM sinusoida berbasis mikrokontroler dapat
menghasilkan putaran motor yang bervariasi
Stable isotope signatures of Holocene syngenetic permafrost trace seabird presence in the Thule District (NW Greenland)
Holocene permafrost from ice wedge polygons in the vicinity of large seabird breeding colonies in the Thule District, NW Greenland, was drilled to explore the relation between permafrost aggradation and seabird presence. The latter is reliant on the presence of the North Water Polynya (NOW) in the northern Baffin Bay. The onset of peat accumulation associated with the arrival of little auks (Alle alle) in a breeding colony at Annikitisoq, north of Cape York, is radiocarbon-dated to 4400 cal BP. A thick-billed murre (Uria lomvia) colony on Appat (Saunders Island) in the mouth of the Wolstenholme Fjord started 5650 cal BP. Both species provide marine-derived nutrients (MDNs) that fertilize vegetation and promote peat growth. The geochemical signature of organic matter left by the birds is traceable in the frozen Holocene peat. The peat accumulation rates at both sites are highest after the onset, decrease over time, and were about 2-times faster at the little auk site than at the thick-billed murre site. High accumulation rates induce shorter periods of organic matter (OM) decomposition before it enters the perennially frozen state. This is seen in comparably high C=N ratios and less depleted 13C, pointing to a lower degree of OM decomposition at the little auk site, while the opposite pattern can be discerned at the thick-billed murre site. Peat accumulation rates correspond to 15N trends, where decreasing accumulation led to increasing depletion in 15N as seen in the little-auk-related data. In contrast, the more decomposed OM of the thick-billed murre site shows almost stable 15N. Late Holocene wedge ice fed by cold season precipitation was studied at the little auk site and provides the first stable-water isotopic record from Greenland with mean 18O of 8:00:8, mean D of 36:25:7, mean d excess of 7:70:7, and a 18O-D slope of 7.27, which is close to those of the modern Thule meteoric water line. The syngenetic ice wedge polygon development is mirrored in testacean records of the little auk site and delineates polygon low-center, dry-out, and polygon-high-center stages. The syngenetic permafrost formation directly depending on peat growth (controlled by bird activity) falls within the period of neoglacial cooling and the establishment of the NOW, thus indirectly following the Holocene climate trends
Climate change impacts on lakes: an integrated ecological perspective based on a multi-faceted approach, with special focus on shallow lakes
Freshwater ecosystems and their biodiversity are presently seriously threatened by global development and population growth,
leading to increases in nutrient inputs and intensification of eutrophication-induced problems in receiving fresh waters, particularly in
lakes. Climate change constitutes another threat exacerbating the symptoms of eutrophication and species migration and loss. Unequivocal
evidence of climate change impacts is still highly fragmented despite the intensive research, in part due to the variety and
uncertainty of climate models and underlying emission scenarios but also due to the different approaches applied to study its effects.
We first describe the strengths and weaknesses of the multi-faceted approaches that are presently available for elucidating the effects
of climate change in lakes, including space-for-time substitution, time series, experiments, palaeoecology and modelling. Reviewing
combined results from studies based on the various approaches, we describe the likely effects of climate changes on biological communities,
trophic dynamics and the ecological state of lakes. We further discuss potential mitigation and adaptation measures to counteract
the effects of climate change on lakes and, finally, we highlight some of the future challenges that we face to improve our capacity for
successful prediction
From intensive care to rehabilitation: survey on the satisfaction with care received during prolonged hospitalization for COVID-19 at a northern Italian university hospital
Objective: Investigating the experiences perceived by COVID-19 inpatients is a fundamental research area that is starting to be explored. For this reason, our objective was to provide the first Italian survey on COVID-19 inpatients' satisfaction, obtained through a self-completed questionnaire previously used in a reference study in a UK cohort of COVID-19 patients.
Subjects and methods: Hospitalized COVID-19 patients (>20 days) admitted to Ferrara University Hospital who underwent rehabilitation during their hospital stay were invited to complete an anonymous questionnaire. The survey's questions explored the patients' satisfaction with the health services received, and their completion took place approximately one year after hospitalization. Information on sex, number of wards, ICU stays, and hospital discharge dates was collected.
Results: Sixty-two completed questionnaires were analyzed. The average overall satisfaction score obtained from the answers indicated by the participants in the tenth question was 4.7 out of 5.0. Very positive responses were observed for information about discharge plans, privacy, management of pain, sleep quality, and feeling of safety. The possibility of being consulted about medications and side effects received a very low satisfaction score. Considering overall satisfaction, no significant differences were noted for sex or ICU stay. The obtained results were almost superimposable to those reported in the cohort of COVID-19 patients of the reference study.
Conclusions: This survey suggested that COVID-19 patients' healthcare satisfaction was high. Nevertheless, some areas must be improved, such as the communication and involvement of the patients in the decision-making of care and the discussion about medications or possible side effects
Habitat heterogeneity on feeding habit of two sympatric and congeneric characidae fishes in two tropical reservoirs
Sound production and pectoral spine locking in a Neotropical catfish (Iheringichthys labrosus, Pimelodidae)
Sviluppi dell'e-commerce in Cina
Technical Report del Dipartimento di Informatica dell'Università Ca' Foscari di Venezi
- …