281 research outputs found
Commentary: Oxygen regulation of breathing through an olfactory receptor activated by lactate
Observational Equivalence and Full Abstraction in the Symmetric Interaction Combinators
The symmetric interaction combinators are an equally expressive variant of
Lafont's interaction combinators. They are a graph-rewriting model of
deterministic computation. We define two notions of observational equivalence
for them, analogous to normal form and head normal form equivalence in the
lambda-calculus. Then, we prove a full abstraction result for each of the two
equivalences. This is obtained by interpreting nets as certain subsets of the
Cantor space, called edifices, which play the same role as Boehm trees in the
theory of the lambda-calculus
A new perspective on the role of CuZn superoxide dismutase (SOD1)
Abstract
The CuZn superoxide dismutase (SOD1), a member of a group of isoenzymes involved in the scavenger of superoxide anions, is a dimeric carbohydrate free protein, mainly localized in the cytosol. The reactive oxygen species (ROS) are involved in many pathophysiological events correlated with mutagenesis, cancer, degenerative processes and aging. In the first part of this mini-review the well known role of SOD1 and ROS are briefly summarized. Following, a potential novel biological action that SOD1 could exert is described, based on the recent researches demonstrating the secretion of this enzyme in many cellular lines. Moreover, the role of impaired mutant SOD1 secretion, associated with cytoplasmic toxic inclusion, which occurs in familial amyotrophic lateral sclerosis (ALS), is summarized. In addition, a depolarization-dependent release of SOD1 in pituitary GH3 cells and in rat synaptosomes through a calcium and SNARE-dependent mechanism is reported
In vitro fruit trees rooting by Agrobacterium rhizogenes wild type infection
Agrobacterium rhizogenes infection at the base of microcuttings in
vitro can improve the rooting of some fruit species. A study was
carried out comparing rooting of almond, apple, plum, Pyrus pyraster
and two hybrid rootstocks, when infected with A. rhizogenesstrain 1855,
with and without the addition of hormones. Three responses occurred:
genotypes rooted without auxins; genotypes rooted only with auxins;
genotypes rooted only after infection. All genotypes rooted after
bacterial infection. In the first group the auxins increased rooting
percentages. No substantial differences were found with and without
infection in hormone free media, while the rooting percentages tended
to decrease with the combination auxin/infection. In the second group,
infection on hormone free media increased rooting; in addition there
was a synergistic effect between auxins and infection in pears. In the
third group only infection induced rooting. A random sample of roots
obtained from infection was molecularly analysed. Amplification of the
sequences of rolB and vir genes was done using PCR. Roots
non-transgenic and confirmed as transgenic were, respectively, 67 % and
6.8 % respectively. In the remaining 26.2% both genes appeared, thus it
was not possible to confirm their transgenic nature. Some microcuttings
showed both transformed and non-transformed roots
New tree monitoring systems: from Industry 4.0 to Nature 4.0
Recently, Internet of Things (IoT) technologies have grown rapidly and represent now a unique opportunity to improve our environmental monitoring capabilities at extremely low costs. IoT is a new system of thinking in which objects, animals or people are equipped with unique identifiers and transfer data a network without requiring human-to-human or human-to-computer interaction. IoT has evolved from the convergence of wireless technologies, microelectromechanical systems (MEMS) and the Internet. The development of these technologies in environmental monitoring domains allows real-time data transmission and numerous low-cost monitoring points. We have designed a new device, the TreeTalker©, which is capable of measuring water transport in trees, diametrical growth, spectral characteristics of the leaves and microclimatic parameters and transmit data in semi-real time. Here we introduce the device’s features, provide an example of monitored data from a field test site and discuss the application of this new technology to tree monitoring in various contexts, from forest to urban green infrastructures management and ecological research
Effect of beta- and alpha-glucans on immune modulating factors expression in enterocyte-like Caco-2 and goblet-like LS 174T cells
The Cholinergic and ACE-2-Dependent Anti-Inflammatory Systems in the Lung: New Scenarios Emerging From COVID-19
The renin angiotensin system and the cholinergic anti-inflammatory pathway have been recently shown to modulate lung inflammation in patients with COVID-19. We will show how studies performed on this disease are starting to provide evidence that these two anti-inflammatory systems may functionally interact with each other, a mechanism that could have a more general physiological relevance than only COVID-19 infection
Gastric leiomyosarcoma: case report and review of literature
True smooth muscle neoplasms of the wall of digestive tract are rare, in particular in the stomach, and the benign ones are prevalent. We report a case of gastric leiomyosarcoma (LMS) that we observed, diagnosed to a 71 years-old man, with important comorbidities, who had already underwent the amputation of the right lower limb. In consequence of the discovery of anaemia and melaena he underwent an endoscopy of the upper GI tract and CT scan, which showed the presence of a neoformation of the gastric wall, but because of the thrombosis of the common iliac artery and the occurrence of the clinical picture of critical ischaemia, at first the patient underwent the amputation of the left lower limb e only then an intervention of atypical gastroresection. Despite the neoplastic infiltration of the resection margins and the impossibility to undertake an adjuvant chemotherapy, the follow-up at 6, 12 and 28 months did not show a recurrence of the disease that remained in phase of clinical remission
The Mediterranean analysis and forecasting physical system for the Copernicus Marine Service: description and skill assessment
The Mediterranean Analysis and Forecasting System is a numerical ocean prediction system that operationally produces analyses and 10 days forecasts of the main physical parameters for the entire Mediterranean Sea and its Atlantic Ocean adjacent areas.
The system is composed by the hydrodynamic model NEMO (Nucleus for European Modelling of the Ocean) 2-way coupled with the third-generation wave model WW3 (WaveWatchIII) and forced by ECMWF (European Centre for Medium-range Weather Forecasts) atmospheric fields. The forecast initial conditions are produced by a 3D variational data assimilation system which considers a daily assimilation cycle of Sea Level Anomaly, vertical profiles of Temperature and Salinity from ARGO and ship CTDs and heat flux corrections with satellite SST.
The system has been recently upgraded in the framework of the Copernicus Marine Environment Monitoring Service (CMEMS) by increasing the grid resolution from 1/16 to 1/24 degree in the horizontal, thus becoming fully mesoscale resolving and from 72 to 141 vertical levels, by increasing the number of fresh water river inputs and by updating the data assimilation scheme. The model has a non-linear explicit free surface and the forecast is forced by surface pressure, interactive heat, momentum and water fluxes at the air-sea interface.
The focus of this work is to present the latest modeling system upgrades and the related improvements achieved by showing the model skill assessment including comparison with independent (insitu coastal moorings) and quasi-independent (insitu vertical profiles and satellite) datasets.PublishedHalifax, Nova Scotia, Canada4A. Oceanografia e clim
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