Search results for "Natural history"
showing 10 items of 124 documents
A century and half of littoral geomorphology
2006
Abstract not available
"Paolo Boccone’s curious observations and the Commitment to Visual Communication of Natural History", speech at International Conference "Art and Sci…
2015
In his "Recherches et observations naturelles" (Amsterdam 1674) the botanist Paolo Boccone (1633- 1704) presents himself as an advocate of a new visual method. He was supported by Jan Swammerdam, with whom he shared his scientific observations. Boccone claims to be the first to apply microscopic dissection to figured stones, in order to distinguish accidental shapes from natural ones. Boccone, as many of the members of the scientific community with whom he corresponded, had a strong commitment to painstaking observation and visual communication, that he was able to handle on many levels. The allegorical frontispiece of "Recherches" is aimed to present a range of moral and psychological atti…
How far do tadpoles travel in the rainforest? : Parent-assisted dispersal in poison frogs
2019
Parents can influence offspring dispersal through breeding site selection, competition, or by directly moving their offspring during parental care. Many animals move their young, but the potential role of this behavior in dispersal has rarely been investigated. Neotropical poison frogs (Dendrobatidae) are well known for shuttling their tadpoles from land to water, but the associated movements have rarely been quantified and the potential function of tadpole transport in dispersal has not been addressed. We used miniature radio-transmitters to track the movements of two poison frog species during tadpole transport, and surveyed pool availability in the study area. We found that parental male…
Karst, acantilados y calas en el Migjorn de Menorca
2017
[spa]La costa sur de la isla de Menorca se caracteriza por la presencia, de forma más o menos continua, de acantilados verticales cortados en los depósitos carbonatados que constituyen una plataforma atribuida al Mioceno superior. Los acantilados se encuentran interrumpidos en la zona litoral por una marcada incisión producida por los barrancos que drenan toda la plataforma miocena del sur de la isla y que, en su desembocadura al mar, dan lugar a las denominadas calas. La forma de éstas viene controlada no tan sólo por la fracturación, que a su vez controla la red de drenaje, sino que también por la contribución de los procesos kársticos que están directamente relacionados con la …
HIV/HCV co-infection: putting the pieces of the puzzle together
2003
The most relevant consequence of human immunodeficiency virus (HIV) infection is the exposure of the patient to opportunistic agents. In addition, HIV may also modify the natural history of some non-opportunistic pathogens, which in turn may alter the course of HIV infection.
Portal Hypertension and Ascites: Patient-and Population-centered Clinical Practice Guidelines by the Italian Association for the Study of the Liver (…
2021
Abstract Portal hypertension and ascites are two crucial events in the natural history of liver cirrhosis, whose appearance marks a downward shift in the prognosis of the disease. Over the years, several international and national societies have issued clinical practice guidelines for the diagnosis and management of portal hypertension and ascites. The present document addresses the needs of an updated guidance on the clinical management of these conditions. Accordingly, the AISF Governing Board appointed a multi-disciplinary committee of experts for drafting an update of the most recent EASL Clinical Practice Guidelines. The aim of this work was to adapt the EASL recommendations to nationa…
International Liver Transplantation Consensus Statement on End-stage Liver Disease Due to Nonalcoholic Steatohepatitis and Liver Transplantation.
2018
Nonalcoholic steatohepatitis (NASH)-related cirrhosis has become one of the most common indications for liver transplantation (LT), particularly in candidates older than 65 years. Typically, NASH candidates have concurrent obesity, metabolic, and cardiovascular risks, which directly impact patient evaluation and selection, waitlist morbidity and mortality, and eventually posttransplant outcomes. The purpose of these guidelines is to highlight specific features commonly observed in NASH candidates and strategies to optimize pretransplant evaluation and waitlist survival. More specifically, the working group addressed the following clinically relevant questions providing recommendations based…
The Gene-Environment Interactions in Respiratory Diseases (GEIRD) Project.
2009
The role of genetic and environmental factors, as well as their interaction, in the natural history of asthma, allergic rhinitis and chronic obstructive pulmonary disease (COPD) is largely unknown. This is mainly due to the lack of large-scale analytical epidemiological/genetic studies aimed at investigating these 3 respiratory conditions simultaneously. The GEIRD project is a collaborative initiative designed to collect information on biomarkers of inflammation and oxidative stress, individual and ecological exposures, diet, early-life factors, smoking habits, genetic traits and medication use in large and accurately defined series of asthma, allergic rhinitis and COPD phenotypes. It is a …
Classical pediatric Hodgkin lymphoma in very young patients: the Italian experience
2019
Many studies have reported a more favorable outcome in younger patients with Hodgkin lymphoma (HL). The aims of this study were to find an appropriate age cutoff able to identify low-risk children and to describe the natural history of 135 very young patients affected by classic HL (cHL). The best age cutoff was identified at 7 years of age. EFS (p = .0451) and PFS (p = .00921) were significantly better in the group of younger patients. The OS rate at 10 years was 97.0% in the younger group and 92.5% in the older one (p = .0448). However, age was not found to be an independent prognostic factor in multivariate analysis and the better prognosis in younger patients seems to be related to more…
A multicentre case control study on complicated coeliac disease: two different patterns of natural history, two different prognoses
2014
Background: Coeliac disease is a common enteropathy characterized by an increased mortality mainly due to its complications. The natural history of complicated coeliac disease is characterised by two different types of course: patients with a new diagnosis of coeliac disease that do not improve despite a strict gluten-free diet (type A cases) and previously diagnosed coeliac patients that initially improved on a gluten-free diet but then relapsed despite a strict diet (type B cases). Our aim was to study the prognosis and survival of A and B cases. Methods: Clinical and laboratory data from coeliac patients who later developed complications (A and B cases) and sex- and age-matched coeliac p…