1,365 research outputs found
Fresh fruit and vegetables: a world of multiple interactions : the case of the Buenos Aires Central Wholesale Market (BACWM)
No full textThis research explores ethnographically the everyday social interactions between the ‘users’ of a particular marketplace, the Buenos Aires Central Wholesale Market (BACWM). The ‘users’ of this marketplace are the social actors who work there everyday, and who bring and buy fresh produce. These ´users´ are the ´makers´ of the BACWM since, through their everyday practices, interactions and interpretations and knowledge, they socially construct this hub of distribution
A Laboratory for Mathematics
No full textMacchine matematiche; dalla storia alla scuola is a book by Maria Grazia Bartolini Bussi and Michela Maschietto that provides a description of the reconstruction of many
historical machines for drawing, and their impact on the history of mathematics. Underlying the book’s thesis are ideas about
education and developments in neuroscience. Laura Tedeschini Lalli discussed the book and the educational experiments and
their goals with author Maria Grazia Bartolini Bussi
Maria Cristina Arellana, Georgina Estevez, and Laura Tobie
No full textThis 1965 photograph shows Maria Cristina Arellana of Havana, Cuba, Georgina Estevez and Laura Tobie, both of Caracas, Venezuela in Hubert Hayes Memorial Log Cabin. Founder and director of the Mountain Youth Jamboree, Hubert H. Hayes (1901-1964) auditioned and directed youth to perform in folk dance, music, and folk and ballad singing. The jamboree was held in the Asheville City Auditorium (now known as Thomas Wolfe Auditorium) from 1948 to 1973, and Hayes’ wife, Leona Trantham Hayes (1913-1989) continued to direct the program after his death in 1964. Hubert Hayes was an author, playwright, and alumni of Duke University
A demonstration of nesting in two antarctic icefish (genus Chionodraco) using a fin dimorphism analysis and ex situ videos.
No full textVisual observations and videos of Chionodraco hamatus icefish at the "Acquario di Genova" and histological analyses of congeneric species C. hamatus and C. rastrospinosus adults sampled in the field provided new anatomical and behavioral information on the reproductive biology of these white blooded species that are endemic to the High-Antarctic region. During the reproductive season, mature males of both species, which are different from females and immature males, display fleshy, club-like knob modifications of their anal fin that consisted of a much thicker epithelium. Histology indicated that the knobs were without any specialized glandular or sensorial organization, thus suggesting a mechanical and/or ornamental role of the modified anal fin. In addition, the occurrence of necrotic regions at the base of the thickened epithelium and the detachment of the knobs in post-spawning C. hamatus males indicated the temporary nature of the knobs. The role of these structures was confirmed as mechanical and was clarified using visual observations and videos of the behavior of two C. hamatus during a reproductive event that occurred in an exhibit tank at the "Acquario di Genova". The reproductive process included pre-spawning activity, preparation of the nest, egg guarding and successfully ended with egg hatching. When the spawning event approached, the male prepared the nest. The nest was constructed on an accurately selected bottom surface, which was flattened and maintained free from sand or debris by a combination of radial body movements and continuous anal fin sweeping, thus demonstrating the important mechanical/abrasive function of the anal fin knobs. The present data are the first records of active nesting in icefish and clarify the meaning of dimorphic temporary structures, whose function would have been difficult to obtain in the field
Co-infection of Streptococcus pneumoniae in Respiratory Infections Caused by SARS-CoV-2
No full textAbstract: Viral respiratory infections are often associated with bacterial co-infections that often lead
to increased severity and mortality of the disease. During the recent pandemic caused by severe acute
respiratory syndrome coronavirus 2 (SARS-CoV-2), hospitalized patients reported developing
secondary bacterial infections ranging from 0 to 40% of the cases. In the previous influenza pandemics,
Streptococcus pneumoniae was the most isolated bacterial pathogen causing increased mortality in
patients affected by viral pneumonia. Due to the difficulty to detect pneumococcal infection in SARSCoV-2 patients by a rapid clinical test, the real prevalence of S. pneumoniae might be underestimated,
and only a few cases have been documented so far. It has been estimated that 90% of patients admitted
to the Intensive Care Unit are empirically treated with antimicrobial. The application of more rapid and
sensitive diagnostic methods could help with targeted antibiotic therapy. Additionally, pneumococcal
vaccination of high-risk individuals could reduce bacterial pneumonia, hospital admissions, and
comorbidities associated with serious illness
Changes in the oral status and periodontal pathogens in a Sardinian rural community from pre-industrial to modern time
No full textThe oral microbial profile in humans has evolved in response to lifestyle changes over the course of different eras. Here, we investigated tooth lesions and the microbial profile of periodontal bacteria (PB) in dental calculus of a Sardinian pre-industrial rural community. In total, 51 teeth belonging to 12 historical individuals buried in an ossuary in the early 1800s and 26 modern teeth extracted from 26 individuals from the same geographical area were compared to determine the oral health status, bacterial load and amount of most relevant PB. Total caries and bacterial genomes count appeared to be sex-related in historical samples. Historical females presented a higher incidence of caries, PB pathogens and a higher bacterial load than historical males. Furthermore, we compared the PB profile of the historical individuals with the modern ones, revealing a notable increase in modern individuals of PB belonging to “Red complex bacteria” often associated with periodontitis and other chronic diseases of modern life. Our findings could be explained through an analysis of environmental factors such as socioeconomic, hygienic and healthy conditions that can have a great impact on oral health and bacterial composition among individuals of the same and different era
L'unificazione del mondo. Alexandre Kojève e lo Stato universale e omogeneo
No full textThe Author reconstructs the genesis and the later developments of the concepts of the «universal and homogeneous State» in Kojève’s writings. From the lectures on Hegel to the Phenomenology of Right and the correspondence with Leo Strauss and Carl Schmitt, the paper analyses Kojève’s thought on the universal and homogeneous State as the political form of the post-historical age. In the last part, the Author reflects on Kojève’s vision of the political form of Europe
In vitro Interactions between Streptococcus intermedius and Streptococcus salivarius K12 on a Titanium Cylindrical Surface
No full textPeri-implantitis is a steadily rising disease and is caused by oral bacterial pathogens able to form biofilm on implant surfaces and peri-implant tissues, making antibiotics treatment less effective. The use of commercial probiotics against oral pathogens could serve as an alternative to prevent biofilm formation. Streptococcus intermedius is one of the early colonizers of biofilm formation in dental implants. The aim of this study was to model the interaction between S. intermedius and Streptococcus salivarius strain K12, a probiotic bacterium producing bacteriocins. S. intermedius was co-cultured with S. salivarius K12 in an in vitro model simulating the biofilm formation in a dental implant composed by a titanium cylinder system. Biofilm formation rate was assessed by Real-Time PCR quantification of bacterial count and expression levels of luxS gene, used in response to cell density in the biofilm. Biofilm formation, bacteriocin production, luxS expression patterns were found to be already expressed within the first 12 h. More importantly, S. salivarius K12 was able to counter the biofilm formation in a titanium cylinder under the tested condition. In conclusion, our dental implant model may be useful for exploring probiotic-pathogen interaction to find an alternative to antibiotics for peri-implantitis treatment
Immagini della libertà
No full textThis essay reconstructs several images of political concept of freedom in the
modern and contemporary tradition. In the first part the Author traces the genealogy
of modern political concept of freedom that produces the achievement of
sovereignty and the individual rights in the age of revolutions. This political and
historical process shows an image of freedom as property of the modern subject
which is free because safe, autonomous and independent. In the second part, the
Author introduces a different imagine of freedom in accord with the arendtian
position of What is freedom? So political freedom can be sketched as an action,
a new beginning, an unexpected event; and thus, this different image of freedom
is showed as a possible way out from our age of crisis
Alla ricerca dell'utopia?
No full textThe Author traces the modern history of political concept of utopia from the publication of More’ Utopia. The historic-philosophical analysis shows that the opposition utopia vs realism and its transformations was (and still is now) central to develop the dialectic between reality and imagination, which is one of the axis of the western political Modernity. But, the epistemic and socio-political crisis of the XXth Century reveals the aporia and contradictions within this dialectic. However, in front of fear and angst ruling our present, the Author shows that a possible way out of our crisis could be in starting up again this dialectic along giving birth to new forms of our political coexistence
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