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Search Results: 1 - 10 of 219551 matches for " Bonacina C "
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Lake Orta: the undermining of an ecosystem
Carla BONACINA
Journal of Limnology , 2001, DOI: 10.4081/jlimnol.2001.53
Abstract: From 1927 to 1986 Lake Orta (North-western Italy) received loadings coming from a rayon factory, rich in copper and ammonium sulphate. Immediately after the onset of pollution, the food web was destroyed: first phytoplankton, then zooplankton, and finally fish and ultraplankton disappeared from the lake. Twenty years later a rise in nitrate nitrogen and copper ions was recorded and in the early sixties ammonium nitrogen started to accumulate and pH to fall. In the meanwhile, a poorly structured biological community appeared, mainly composed of Cyclops abyssorum (copepod), Hexarthra fennica (rotifer) and Coccomyxa minor (green alga). Fish and benthonic animals were still absent. In 1986 the ammonium loading was substantially reduced (copper had been partially recovered since 1956), so that the in-lake ammonium concentration began to decrease. Some phyto- and zooplankton as well as benthic species were recorded in this period. Nevertheless, as pH was still very acid and alkaline reserve absent: a proposal to lime the lake was accepted and funded by regional authorities. Liming was performed in May 1989-June 1990 and resulted in a real improvement of the environment.
Has Lake Orta completely recovered from its heavy polluted condition? A seventy years long history
Carla BONACINA
Journal of Limnology , 2001, DOI: 10.4081/jlimnol.2001.1.285
Abstract: Taking in account the results obtained from the 16 previous papers, the present conditions of Lake Orta are stated. While chemical features are now almost normal, it was demonstrated that sediments still contain large amounts of heavy metals in the upper 10 cm and are thus to be considered still toxic for benthic fauna. Algal community shows evidence of increasing complexity and stability, so does zooplankton, albeit to a lesser extent. Benthic fauna is still affected by past water pollution and is very poor both in number of species and of individuals.
Shrinking the room for invasive ventilation in hypercapnic respiratory failure
Scarpazza P, Incorvaia C, Melacini C, Cattaneo R, Bonacina C, Riario-Sforza GG, Casali W
International Journal of Chronic Obstructive Pulmonary Disease , 2013, DOI: http://dx.doi.org/10.2147/COPD.S41374
Abstract: inking the room for invasive ventilation in hypercapnic respiratory failure Rapid Communication (260) Total Article Views Authors: Scarpazza P, Incorvaia C, Melacini C, Cattaneo R, Bonacina C, Riario-Sforza GG, Casali W Published Date March 2013 Volume 2013:8 Pages 135 - 137 DOI: http://dx.doi.org/10.2147/COPD.S41374 Received: 10 December 2012 Accepted: 21 January 2013 Published: 15 March 2013 Paolo Scarpazza,1 Cristoforo Incorvaia,2 Chiara Melacini,1 Roberta Cattaneo,1 Cristiano Bonacina,1 Gian Galeazzo Riario-Sforza,2 Walter Casali1 1Pneumology Unit, Ospedale Civile, Vimercate, 2Pulmonary Rehabilitation, Istituti Clinici di Perfezionamento, Milan, Italy Abstract: Noninvasive ventilation (NIV) was introduced as an alternative to invasive mechanical ventilation for acute respiratory failure caused from exacerbations of chronic obstructive pulmonary disease in the 1980s, and its use gradually rose worldwide. Seventy-eight patients (57 males, mean age 78.3 ± 9.2 years) undergoing NIV were evaluated. Of them, 48 (62.3%) had acute hypercapnic respiratory failure because of a chronic obstructive pulmonary disease exacerbation, and the remaining 30 had acute hypercapnic respiratory failure from other causes, mainly cardiac failure. All patients were treated by NIV using the bi-level positive airway pressure set up at high pressure/high backup rate. NIV was successful in 67 subjects (85.9%) and the patients were discharged, 57 of whom continued NIV at home and ten had spontaneous breathing. NIV was unsuccessful in eleven patients, ten of whom died and one was successfully treated by invasive mechanical ventilation. Significant differences were detected for a higher basal Glasgow Coma Scale score in successfully treated patients (P = 0.007), a higher basal Acute Physiology and Chronic Health Evaluation score in unsuccessfully treated patients (P = 0.004), and a lower pH after 1 hour in unsuccessfully treated patients (P = 0.015). These findings show a very high rate of success of NIV in patients with acute hypercapnic respiratory failure not only from chronic obstructive pulmonary disease but also from cardiac failure. This suggests that the use of invasive mechanical ventilation may be further reduced, with a decrease in its known complications as well.
Lake Orta: a case study (Part 1)
Carla BONACINA,Renato BAUDO
Journal of Limnology , 2001, DOI: 10.4081/jlimnol.2001.50
Abstract: Preface The extraordinary case of industrial pollution in Lake Orta was followed and documented by the Istituto Italiano di Idrobiologia from its very origin in 1926. Many papers were published regarding the effects of the pollution on chemistry and biology of the lake but they were scattered in various scientific journals and in a long time period. Now the time has come to draw the conclusions of our long work and the long history of the lake. We planned to publish a monographic volume, but technical reasons made it impossible to realise this project. The papers which could have formed the volume will be splitted into issues 60(1) and 60(2) of Journal of Limnology.
Zooplankton of Lake Orta after liming: an eleven years study
Carla BONACINA,Andrea PASTERIS
Journal of Limnology , 2001, DOI: 10.4081/jlimnol.2001.101
Abstract: Lake Orta (N. Italy) was severely polluted from 1927 by an effluent from a rayon factory, which discharged great amounts of ammonium nitrogen and copper into the lake. In the mid nineteen fifties, some plating factories also started dumping chromium and aluminum. As a result of ammonium oxidation, the lake became very acid and the concentration of metals in the waters reached very high values. Phytoplankton, zooplankton and fish disappeared suddenly from the lake which was by 1930 classified as “sterile”. Later on, about the fifties, a small population of Cyclops abyssorum re-colonised the lake together with some rotifers, in particular Hexarthra fennica. In mid eighties following the introduction of anti-pollution legislation, ammonium loads were greatly reduced and Daphnia obtusa was recorded. The lake waters however were still very acid, prompting the proposal of the Istituto Italiano di Idrobiologia to lime the lake with calcium carbonate to neutralise the excess acidity and reconstruct the alkaline reserve. This was done successfully from May 1989 to June 1990. pH values began to rise and in the same time the metal concentrations decreased, so that at present the lake waters are almost “normal”. In the meantime, due to the increased pH values, D. obtusa was replaced by D. longispina and, as toxic metal concentrations became lower, Megacyclops viridis, Bosmina longirostris, Diaphanosoma brachyurum, Keratella quadrata, Asplanchna priodonta. and other Brachionidae species appeared. Diaptomidae are still absent, except for some specimens of Arctodiaptomus wierzejskii.
Elabora??o de empanado a partir da corvina (Micropogonias furnieri)
Bonacina, Marlice;Queiroz, Maria Isabel;
Ciência e Tecnologia de Alimentos , 2007, DOI: 10.1590/S0101-20612007000300019
Abstract: this study involved the preparation of breaded whitemouth croaker (micropogonias furnieri). the fish were measured and weighed, their freshness was evaluated based on ph and total volatile bases (tvb), and their proximal composition was analyzed. the average size and weight were 28.0 cm and 268.3 g, respectively. the specimens? ph and concentrations of n-tvb were within the limits established by the brazilian legislation. the proximal composition of the whitemouth croaker was moisture: 78.7%, protein: 18.8%, ash: 1.2%, and fat: 1.1%. preliminary tests were carried out to define the base formulation, which served to determine the 30-second pre-frying time of the product. the final formulation of the product was defined based on a complete 23 factorial plan with central points in triplicate, varying the washing time of the muscle (0, 15, and 30 seconds), the sodium lactate concentration (0, 0.8 and 1.6%) and the powdered milk (0, 1, and 2%). the response variables were cra, moisture, protein and fat, the overall sensory quality, and the attributes of appearance, crunchiness, texture and flavor. the results indicated that the muscle washing time was the factor that most strongly affected the product?s sensorial characteristics, while the physical characteristics were influenced by the three factors studied. therefore, the chosen formulation was subjected to the following conditions: 30 seconds of muscle wash, 2% of powdered milk and absence of sodium lactate.
Abstract Canonical Inference
Maria Paola Bonacina,Nachum Dershowitz
Computer Science , 2004, DOI: 10.1145/1182613.1182619
Abstract: An abstract framework of canonical inference is used to explore how different proof orderings induce different variants of saturation and completeness. Notions like completion, paramodulation, saturation, redundancy elimination, and rewrite-system reduction are connected to proof orderings. Fairness of deductive mechanisms is defined in terms of proof orderings, distinguishing between (ordinary) "fairness," which yields completeness, and "uniform fairness," which yields saturation.
Long-term survival in elderly patients with a do-not-intubate order treated with noninvasive mechanical ventilation
Scarpazza P, Incorvaia C, Amboni P, di Franco G, Raschi S, Usai P, Bernareggi M, Bonacina C, Melacini C, Cattaneo R, Bencini S, Pravettoni C, Riario-Sforza GG, Passalacqua G, Casali W
International Journal of Chronic Obstructive Pulmonary Disease , 2011, DOI: http://dx.doi.org/10.2147/COPD.S18501
Abstract: ng-term survival in elderly patients with a do-not-intubate order treated with noninvasive mechanical ventilation Original Research (4007) Total Article Views Authors: Scarpazza P, Incorvaia C, Amboni P, di Franco G, Raschi S, Usai P, Bernareggi M, Bonacina C, Melacini C, Cattaneo R, Bencini S, Pravettoni C, Riario-Sforza GG, Passalacqua G, Casali W Published Date April 2011 Volume 2011:6 Pages 253 - 257 DOI: http://dx.doi.org/10.2147/COPD.S18501 Paolo Scarpazza1, Cristoforo Incorvaia2, Paolo Amboni3, Giuseppe di Franco1, Stefania Raschi1, Pierfranco Usai1, Monica Bernareggi1, Cristiano Bonacina1, Chiara Melacini1, Roberta Cattaneo1, Serena Bencini1, Chiara Pravettoni2, Gian Galeazzo Riario-Sforza2, Gianni Passalacqua4, Walter Casali1 1Divisione di Broncopneumotisiologia, Ospedale Civile, Vimercate, Italy; 2Pulmonary Rehabilitation, Istituti Clinici di Perfezionamento, Milan, Italy; 3Clinical Chemistry Laboratory, Ospedali Riuniti, Bergamo, Italy; 4Allergy and Respiratory Diseases, University Of Genoa, Genoa, Italy Background: Noninvasive mechanical ventilation (NIMV) is an effective tool in treating patients with acute respiratory failure (ARF), since it reduces both the need for endotracheal intubation and the mortality in comparison with nonventilated patients. A particular issue is represented by the outcome of NIMV in patients referred to the emergency department for ARF and with a do-not-intubate (DNI) status because of advanced age or excessively critical conditions. This study evaluated long-term survival in a group of elderly patients with acute hypercapnic ARF who had a DNI order and who were successfully treated by NIMV. Methods: The population consisted of 54 patients with a favorable outcome after NIMV for ARF. They were followed up for 3 years by regular control visits, with at least one visit every 4 months, or as needed according to the patient’s condition. Of these, 31 continued NIMV at home and 23 were on long-term oxygen therapy (LTOT) alone. Results: A total of 16 of the 52 patients had not survived at the 1-year follow-up, and another eight patients died during the 3-year observation, with an overall mortality rate of 30.8% after 1 year and 46.2% after 3 years. Comparing patients who continued NIMV at home with those who were on LTOT alone, 9 of the 29 patients on home NIMV died (6 after 1 year and 3 after 3 years) and 15 of the 23 patients on LTOT alone died (10 after 1 year and 5 after 3 years). Conclusion: These results show that elderly patients with ARF successfully treated by NIMV following a DNI order have a satisfactory long-term survival.
Sulla risoluzione degli indirizzi IP - Parte II - Domain Name System
S. Bonacina,Francesca Giuratrabocchetti,D. Stefanoni
Bollettino del CILEA , 2003, DOI: 10.1472/bc.v86ifebbraio.798
Abstract: Prosegue anche in questo numero la pubblicazione di una monografia a puntate sul riconoscimento degli indirizzi IP. Il lavoro è originato dalla attività di dottorato di Stefano Bonacina, dottorando in Bioingegneria del Politecnico di Milano. Il documento originale è stato curato e rivisto nel suo complesso dagli specialisti di reti del CILEA, anche per tenere conto delle attuali evoluzioni delle soluzioni software. Questa seconda parte descrive il Domain Name System, il servizio software che si occupa di tradurre gli indirizzi numerici, adatti ai computers, in nomi a dominio, più adatti agli umani.
Sulla risoluzione degli indirizzi IP - Parte III - Domain Name System
S. Bonacina,Francesca Giuratrabocchetti,D. Stefanoni
Bollettino del CILEA , 2003, DOI: 10.1472/bc.v87iaprile.804
Abstract: Con questo articolo continua la pubblicazione a puntate della monografia sul riconoscimento degli indirizzi IP. Il lavoro è originato dalla attività di dottorato di Stefano Bonacina, dottorando in Bioingegneria del Politecnico di Milano. Il documento originale è stato curato e rivisto nel suo complesso dagli specialisti di reti del CILEA, anche per tenere conto delle attuali evoluzioni delle soluzioni software. Questa terza parte riprende e conclude la descrizione del Domain Name System, il servizio che, sulla rete Internet, si occupa della traduzione degli indirizzi IP in nomi a dominio e viceversa. Le prime due puntate sono state pubblicate sui numeri 85 e 86 del Bollettino del CILEA.
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