36,203 research outputs found
Updates in the flora of the Maltese Islands (Central Mediterranean)
No full textDuring the last 5 years, this author has been involved in the research and exploration of the flora of the
Maltese islands in order to create and update the website http://www.maltawildplants.com. This paper
consists of several important discoveries of new populations of very rare or endangered floral species for
the Maltese Islands which were recorded during field surveys to collect material for this website. It also
includes the species Calendula bicolor Rafin., which is a new record for the Maltese islands.peer-reviewe
Flora Tristan Life Stories
No full textFlora Tristan is best known as a nineteenth century French social critic and reformer. Her writings can be seen as a precursor to Marxism and Feminism. Flora Tristan: Life Sories by Susan Grogan, investigates the life of Flora Tristan through an exploration of the way she represented herself in her own writings. The author also examines the portrayal of Flora Tristan in paintings and literature. Rather than adopting a chronological approach, the author surveys the personae of Flora Tristan through thematic chapters on her roles as author, socialist, traveller and "Mother of the Workers". She places Flora Tristan in the context of contemporary debates and ideas, adding to our understanding of the times in which Flora Tristan lived. Flora Tristan: Life Stories argues that Flora Tristan's self-representations were attempts to claim a role of authority and significance not open to women in the nineteenth century. This authoritative study also engages with attempts to re-evaluate the writing of biography and to explore the meaning of an individual life in historical context.Book Cover -- Title -- Copyright -- ContentsFlora Tristan is best known as a nineteenth century French social critic and reformer. Her writings can be seen as a precursor to Marxism and Feminism. Flora Tristan: Life Sories by Susan Grogan, investigates the life of Flora Tristan through an exploration of the way she represented herself in her own writings. The author also examines the portrayal of Flora Tristan in paintings and literature. Rather than adopting a chronological approach, the author surveys the personae of Flora Tristan through thematic chapters on her roles as author, socialist, traveller and "Mother of the Workers". She places Flora Tristan in the context of contemporary debates and ideas, adding to our understanding of the times in which Flora Tristan lived. Flora Tristan: Life Stories argues that Flora Tristan's self-representations were attempts to claim a role of authority and significance not open to women in the nineteenth century. This authoritative study also engages with attempts to re-evaluate the writing of biography and to explore the meaning of an individual life in historical context.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
Brazilian Flora 2020: Innovation and collaboration to meet Target 1 of the Global Strategy for Plant Conservation (GSPC). : Brazilian Flora 2020
No full textThe Global Strategy for Plant Conservation (GSPC) was established by the Conference of Parties in 2002 todecrease the loss of plant diversity, reduce poverty and contribute to sustainable development. To achieve thisoverarching goal, the GSPC has established a series of targets, one of which is to ensure that plant diversity iswell understood, so that it can be effectively conserved and used in a sustainable manner. Brazil hosts morethan 46,000 species of plants, algae and fungi, representing one of the most biodiverse countries on Earth, andplaying a key role in the GSPC. To meet the GSPC goals of Target 1 and facilitate access to plant diversity,Brazil committed to preparing the List of Species of the Brazilian Flora (2008–2015) and the Brazilian Flora2020 (2016–present). Managing all the information associated with such great biodiversity has proven to be anextremely challenging task. Here, we synthesize the history of these projects, focusing on the multidisciplinaryand collaborative approach adopted to develop and manage the inclusion of all the knowledge generated thoughdigital information systems. We further describe the methods used, challenges faced, and strategies adopted, aswell as summarize advances to date and prospects for completing the Brazilian flora in 2020.Key words: database, diversity, hotspots, taxonomy.A Estratégia Global para a Conservação das Plantas (GSPC) foi estabelecida pela Conferência das Partes em2002 para diminuir a perda da diversidade vegetal, reduzir a pobreza e contribuir para o desenvolvimentosustentável. Para atingir um objetivo tão abrangente, a GSPC estabeleceu uma série de tarefas, uma das quaisé assegurar um bom conhecimento da diversidade vegetal para que a mesma possa ser conservada de formaefetiva e utilizada de maneira sustentável. O Brasil possui mais de 46 mil espécies de plantas, algas e fungos,representando um dos países com maior biodiversidade no planeta, sendo um participante chave na GSPC.Para atingir os objetivos da GSPC e possibilitar o acesso à diversidade de plantas, o Brasil se comprometeuem preparar a Lista de Espécies da Flora do Brasil (2008-2015) e a Flora do Brasil 2020 (2016 até o presente).Gerenciar todas as informações relacionadas a esta enorme biodiversidade provou ser uma tarefa extremamentedesafiadora. Neste artigo, sintetizamos a história destes projetos e a abordagem multidisciplinar e colaborativaadotada para desenvolver e gerenciar a inclusão de todo o conhecimento gerado em sistemas de informaçãodigitais. Apresentamos ainda os métodos utilizados, desafios enfrentados, e estratégias adotadas, bem comosintetizamos os avanços até o momento e perspectivas para completar a flora do Brasil em 2020.Palavras-chave: banco de dados, diversidade, hotspots, taxonomia.Brazilian Flora 202
An innovative approach for reducing the seismic risk of existing buildings and historic sites.
No full textThe seismic risk is one of biggest challenges for civil engineers, and a number of mitigation
strategies have been developed in time with reference to existing or new buildings. Nowadays, refined techniques
based either on structural reinforcement or seismic isolation exist to protect new and existing structures
from seismic shaking. This paper presents some results of a research activity in progress at the University of
Napoli Federico II (Italy), aimed to check the effectiveness of an innovative approach for reducing the seismic
risk by using soft grouting mixtures installed at an optimum depth in the foundation soil. The basic idea is that
a thin grouted layer, with a dynamic impedance much smaller than that of the surrounding soil, will filter most
of the seismic ground motion, with very little energy being transmitted to the overlying soil. The effectiveness
of the insertion of a soft grouted layer in the range of frequency affecting the response of squat buildings was
numerically tested via a parametric analyses, with reference to a simplified one-dimensional scheme
Madrid urban flora: urban wild plants list, Red List of threatened plants and recomendations for the management of the city botanic heritage
No full textSugerencias de referencia o cita bibliográfica:
Para la obra completa
Bot Mad et al. (2023). Madrid flora urbana. Catálogo de la flora silvestre urbana, Lista Roja y recomendaciones para la gestión del patrimonio botánico de la ciudad. Doce Calles, Madrid. Aranjuez. 590 pp.
Para un capítulo:
Domínguez Lozano, F.,Mola, I., Pajarón Sotomayor, S. (2023). La ciudad y la naturaleza urbana. En: Bot Mad et al. (ed.), Madrid flora urbana. Catálogo de la flora silvestre urbana, Lista Roja y recomendaciones para la gestión del patrimonio botánico de la ciudad, pp. 17-31. Doce Calles, Aranjuez.
Para una ficha de especie como:
Mola Caballero de Rodas, I. Chenopodium album L. En: Bot Mad et al. (ed.), Madrid flora urbana. Catálogo de la flora silvestre urbana, Lista Roja y recomendaciones para la gestión del patrimonio botánico de la ciudad, pp. 94. Doce Calles, Aranjuez.Introducción. La ciudad y la naturaleza urbana. Madrid y la importancia de su flora
Metodología. ¿Cómo saber qué plantas silvestres viven dentro de una ciudad?
Resultados. Las grandes cifras de la flora madrileña
Lista roja. Las especies en peligro del Madrid Urbano: ensayo metodológico y lista roja
Especies autóctonas. Las plantas madrileñas más frecuentes
Especies alóctonas. Las plantas madrileñas más frecuentes
Ornamentales. El origen de la flora ornamental de Madrid
Análisis. ¿Qué nos dicen los datos? Análisis de los resultados
Perturbaciones. Perturbaciones y procesos de extinción en los entornos urbanos
Recomendaciones. Recomendaciones generales para una gestión de la flora y la vegetación madrileñas
Plan de Biodiversidad. El Plan de Biodiversidad madrileño y la flora urbana de la ciudad
Epílogo. Declaración botánica de Madrid
Anexos: I. Catálogo de la flora vascular del Madrid Urbano. I I . Listado de especies ornamentales presentes en Madrid.I I I . Bibliografía de la BFCMU. ÍndicesAyuntamiento de MadridDepto. de Biodiversidad, Ecología y EvoluciónFac. de Ciencias BiológicasTRUEpu
Bryophyte flora of Western Melanesia
No full textA project dealing with the hepatic and moss floras of New Guinea and the Solomon Islands has proceeded more than halfway. The revision of the flora is based on the study of ca 17000 specimens collected in 1981. Two new genera and ca 50 new species have been described in 33 published papers and seven manuscripts. Many families, genera and species not previously recorded for the area have been added to the flora. More than 300 names have been reduced to synonyms. The percentage of endemic species of liverworts (40 %) is higher than that of mosses (18 %). Most of the endemic species occur at elevations above 1700 m. The geological history of New Guinea suggests that these high altitude endemics may be relatively young, i.e. less than 10 million years old. The moss flora is more closely related to the floras of Indonesia and the Philippines and continental Asia than to that of Australia. This can be explained by plate tectonics. The altitudinal distribution of hepatic and moss floras partly coincides with the zonation of vegetation proposed earlier. Human influence on bryophyte floras is devastating but a part of the flora may survive in gardens and plantations
An evaluation of methods to assess the effect of antimicrobial residues on the human gut flora
No full text1. Barrier effect. Relevant models should include an anaerobic dominant flora that antagonizes minor bacterial populations such as drug resistant E. coli.
2. Anaerobes vs. aerobes. Aerobe counts are more precise and much less time consuming than anaerobe counts. Minor populations of drug resistant aerobes are sensitive markers of the ecosystem balance, and are directly relevant to the potential risk of antimicrobial residues.
3. MIC vs. plate counts. The determination of minimum inhibitory concentrations ( MIC ) of selected clones is time consuming, does not detect subdominant resistance (less than 1 %), and the MIC shift is difficult to test statistically. In contrast, direct counts of bacteria on drug supplemented media allows a rapid measure of minor resistant populations.
4. Statistics: Most published designs do not include adequate statistical evaluation. This is critical for trials made in conventional humans and animals, where data are highly variable.
5. Human trials: The lowest concentration of antibiotic tested in human volunteers (2mg oxytetracycline /d for 7d in 6 subjects) significantly increased the proportion of resistant fecal enterobacteria (P=0.05). However, the huge day-to-day and inter-individual variations of human floras make this evidence rather weak.
6. Gnotobiotic mice inoculated with human flora are living isolated models in which the effect of any antimicrobial on the human gut flora can be tested. This in vivo model does include the barrier effect of dominant anaerobes. Inter-individual and day-to-day variations of bacterial populations are lower in those mice than in humans.
7. Most resistant enterobacteria in the human gut of untreated people come from bacterial contamination of raw foods. The relative contribution of residues in selecting antibiotic resistance seems to be low when compared to bacterial contamination
Dispositivi pittorici nella narrativa di Vincenzo Consolo.
No full textThe study highlights the originality of Consol's stylistic experimentation and examines the iconological construction of novels. The adoption of an iconic perspective is the rhetorical strategy with which the Sicilian author formalizes techniques of metaphorical irradiation and analogical sequences.The problematic intensity of the historic invention is set out in a complex mesh of symmetries and antitheses among pictorial and narrative symbols, and is articulated as metonymic flow of images that are able to show materials and forms of the modern novel
Model Systems of Human Intestinal Flora, to Set Acceptable Daily Intakes of Antimicrobial Residues
No full textThe veterinary use of antimicrobial drugs in food producing animals may result in residues in food, that might modify the consumer gut flora. This review compares three model systems that maintain a complex flora of human origin: (i) human flora associated (HFA) continuous flow cultures in chemostats, (ii) HFA mice, and (iii) human volunteers. The "No Microbial Effect Level" of an antibiotic on human flora, measured in one of these models, is used to set the accept¬able daily intake (ADI) for human consumers. Human volunteers trials are most relevant to set microbio¬log¬ical ADI, and may be considered as the "gold standard". However, human trials are very expensive and unethical. HFA chemostats are controlled systems, but tetracycline ADI calculated from a chemostat study is far above result of a human study. HFA mice studies are less expensive and better controlled than human trials. The tetracycline ADI derived from HFA mice studies is close to the ADI directly obtained in human volunteers
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