1,720,999 research outputs found
Effects of ranitidine and its photoderivatives in the aquatic environment
No full textThis study was designed to assess the overall ecotoxicity of ranitidine, a histamine H2-receptor antagonist that inhibits stomach acid production. Hence, in addition to ranitidine, its main two photoderivatives, obtained by solar simulator irradiation in water, were investigated. The photoproducts were identified by their physical features. Bioassays were performed on rotifers and microcrustaceans to assess acute and chronic toxicity, while SOS Chromotest and Ames test were utilized to detect the genotoxic potential of the investigated compounds. The results showed that ranitidine did not show any acute toxicity at the highest concentration tested (100 mg/L) for all the organisms utilized in the bioassays. Chronic exposure to these compounds caused inhibition of growth population on rotifers and crustaceans. Genotoxic and mutagenic effects were especially found for one photoproduct suggesting that transformation products, as frequently demonstrated, may show effects higher than the respective parental compound
Fitness e osteoporosi
No full textFitness must be considered as part of an
healthy lifestyle; in addition to physical activity,
a fitness program includes nutrition and attention
to factors that may positively affect health; in this
context, fitness can be a valuable prevention pro-
gram against osteoporosis, contributing to reach
a high peak bone mass until the third decade of
life, and then slowing down the physiological
bone loss
Multidisciplinary approach for poor prognosis sinonasal tumors: Phase II studies of chemotherapy, surgery, photon and heavy ion radiotherapy integration for more effective and less toxic treatment-Trials in progress
No full textFibrolipoma del canale di Guyon: a proposito di un caso
No full textIl fibrolipoma è un tumore lipocitico benigno classificato come una rara variante istotipica del
lipoma convenzionale. In letteratura ne sono descritti molteplici casi ma nessuno a livello dell’arto
superiore. Si illustra un caso di fibrolipoma sviluppato all’interno del canale ulnare distale e si riporta una revisione della letteratura focalizzando
le tematiche eziologiche e diagnostiche.Fibrolipoma is a adipocyte benign tumor classified as a rare histological variant of conventional lipoma. In literature several cases are described
but none at the level of the upper limb.
We Illustrate a case of fibrolipoma developed within the distal ulnar channel and report a literature review focusing on the issues of etiology
and diagnosis
Laser scanner survey and 3-d modeling of the Cetara tower on the amalfitan coast.
No full textThe main goal of this work is to study and experiment the use of the terrestrial laser scanning technique in order to survey an architectural heritage. The experiment concerns the survey and the modeling of a tower characterized by a very articulated plan and a complex geometry placed in Cetara (Amalfitan Coast). We used three different laser scanners: Cyrax HDS2500, Optech ILRIS-3D and Riegl LMSZ420.
The surveys carried out with the three different instruments demanded different design, planning and execution of the experiment. In order to carry out the survey of the Tower it has been necessary to run a high number of scans from various points of view and with different resolutions. This was necessary for the correct reconstruction of the architectonic elements which are complex and difficult to bring to simple and linear geometries. Modeling has been carried out using several commercial softwares used to filter the scan results and to reconstruct the 3D model of point clouds and the solid model by means of triangulation.
By means of the DTMs derived from the three laser scanners we finally elaborated a number of orthophotos using a digital photogrammetrical software. We started from the images acquired with a semi-metric camera, the Nikon D100; we compared our different orthophotos among them and with that one derived from the DTM obtained by means of digital matching on the photogrammetric stereo pair. Such a comparison was made on a number of common check points
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