Search results for " s.p.a."

showing 10 items of 253 documents

Hypothesis: Etiologic and Molecular Mechanistic Leads for Sporadic Neurodegenerative Diseases Based on Experience With Western Pacific ALS/PDC

2019

Seventy years of research on Western Pacific amyotrophic lateral sclerosis and Parkinsonism-dementia Complex (ALS/PDC) have provided invaluable data on the etiology, molecular pathogenesis and latency of this disappearing, largely environmental neurodegenerative disease. ALS/PDC is linked to genotoxic chemicals (notably methylazoxymethanol, MAM) derived from seed of the cycad plant (Cycas spp.) that were used as a traditional food and/or medicine in all three disease-affected Western Pacific populations. MAM, nitrosamines and hydrazines generate methyl free radicals that damage DNA (in the form of O6-methylguanine lesions) that can induce mutations in cycling cells and degenerative changes …

0301 basic medicineamyotrophic lateral sclerosisDNA damageDiseaseBiologylcsh:RC346-429Environmental - originProgressive supranuclear palsy03 medical and health sciences0302 clinical medicineHypothesis and TheorymedicinenitrosaminesAmyotrophic lateral sclerosislcsh:Neurology. Diseases of the nervous systemhydrazinesprogressive supranuclear palsymedicine.diseaseatypical parkinsonism030104 developmental biologyBrain degenerationNeurologyImmunologyEtiologycycad methylazoxymethanol and L-BMAADNA damageNeurology (clinical)Alzheimer's diseaseAlzheimer disease030217 neurology & neurosurgeryFrontiers in Neurology
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Genomic characterization of the Braque Français type Pyrénées dog and relationship with other breeds

2018

The evaluation of genetic variability is a useful research tool for the correct management of selection and conservation strategies in dog breeds. In addition to pedigree genealogies, genomic data allow a deeper knowledge of the variability and genetic structure of populations. To date, many dog breeds, such as small regional breeds, still remain uncharacterized. Braque Français type Pyrénées (BRA) is a dog breed originating from a very old type of gun-dog used for pointing the location of game birds to hunters. Despite the ancient background, the knowledge about levels of genetic diversity, degree of inbreeding and population structure is scarce. This may raise concerns on the possibility …

0301 basic medicinedogsHeredityPopulation geneticsLinkage DisequilibriumDog Genetic diversity SNP Markers Braque Français type Pyrénées LUPA project Dog GenotypingDog Genetic diversitySettore AGR/17 - Zootecnica Generale E Miglioramento GeneticoEffective population sizegenetic parametersInbreedingMammalseducation.field_of_studyGenomeMammalian GenomicsMultidisciplinaryEcologyPets and Companion AnimalsSNP MarkersQREukaryotaBraque Français type PyrénéesBreedLUPA projectVertebratesGenetic structureMedicineInbreedingResearch ArticleGenotypeEcological MetricsPopulation SizeScienceAnimal TypesPopulationSNPBiologyPolymorphism Single Nucleotidediversity03 medical and health sciencesPopulation MetricsEffective Population SizeGeneticsgenomicsAnimalsgenetic distancesGenetic variabilityeducationDog GenotypingBraque Français SNP array Genetic diversity and population structurePopulation DensityEvolutionary BiologyGenetic diversityWolvesPopulation BiologyEcology and Environmental SciencesOrganismsGenetic VariationBiology and Life Sciencesbraque françaisBayes TheoremSpecies DiversityGenetics Population030104 developmental biologyAnimal GenomicsEvolutionary biologyAmniotesZoologyPopulation Genetics
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Automated Categorization of Parkinsonian Syndromes Using Magnetic Resonance Imaging in a Clinical Setting

2020

Background Machine learning algorithms using magnetic resonance imaging (MRI) data can accurately discriminate parkinsonian syndromes. Validation in patients recruited in routine clinical practice is missing. Objective The aim of this study was to assess the accuracy of a machine learning algorithm trained on a research cohort and tested on an independent clinical replication cohort for the categorization of parkinsonian syndromes. Methods Three hundred twenty-two subjects, including 94 healthy control subjects, 119 patients with Parkinson's disease (PD), 51 patients with progressive supranuclear palsy (PSP) with Richardson's syndrome, 35 with multiple system atrophy (MSA) of the parkinsoni…

0301 basic medicinemedicine.medical_specialtyParkinson's diseaseParkinson's diseasemultiple system atrophyProgressive supranuclear palsyDiagnosis Differential03 medical and health sciences0302 clinical medicinePhysical medicine and rehabilitationParkinsonian DisordersmedicineHumansmultimodal magnetic resonance imagingReceiver operating characteristicmedicine.diagnostic_testbusiness.industryParkinsonismMagnetic resonance imagingprogressive supranuclear palsymedicine.diseaseMagnetic Resonance Imaging3. Good healthnervous system diseasesmachine learning algorithm030104 developmental biologyDiffusion Tensor ImagingNeurologyCategorizationnervous systemCohort[SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]Neurology (clinical)Supranuclear Palsy Progressivebusiness030217 neurology & neurosurgeryDiffusion MRI
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Modulating disease-relevant tau oligomeric strains by small molecules

2020

The pathological aggregation of tau plays an important role in Alzheimer's disease and many other related neurodegenerative diseases, collectively referred to as tauopathies. Recent evidence has demonstrated that tau oligomers, small and soluble prefibrillar aggregates, are highly toxic due to their strong ability to seed tau misfolding and propagate the pathology seen across different neurodegenerative diseases. We previously showed that novel curcumin derivatives affect preformed tau oligomer aggregation pathways by promoting the formation of more aggregated and nontoxic tau aggregates. To further investigate their therapeutic potential, we have extended our studies o disease-relevant bra…

0301 basic medicinetau oligomeric strainsCurcuminTau proteinsmall moleculetau ProteinsProtein aggregationBiochemistrytau proteinoligomerProgressive supranuclear palsyprotein aggregationDiagnosis DifferentialSmall Molecule Libraries03 medical and health scienceschemistry.chemical_compoundBiopolymersmental disordersmedicineHumansMolecular BiologyCells CulturedNeurons030102 biochemistry & molecular biologybiologyChemistryDementia with Lewy bodiesbrain-derived tau oligomerstau aggregationtauopathytoxicityBrainMolecular Bases of DiseaseCell Biologymedicine.diseaseSmall moleculeImaging agentCell biology030104 developmental biologyTauopathiesbiology.proteinCurcuminTauopathyThe Journal of Biological Chemistry
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Superfluorinated ionic liquid crystals based on supramolecular, halogen-bonded anions

2016

Unconventional ionic liquid crystals in which the liquid crystallinity is enabled by halogen-bonded supramolecular anions [CnF2 n+1-I⋯I⋯I-CnF2 n+1]- are reported. The material system is unique in many ways, demonstrating for the first time 1) ionic, halogen-bonded liquid crystals, and 2) imidazolium-based ionic liquid crystals in which the occurrence of liquid crystallinity is not driven by the alkyl chains of the cation. Out of the ordinary: The high directionality of halogen bonds and the fluorophobic effect were exploited in the design and synthesis of a new family of unconventional superfluorinated ionic liquid crystals. The liquid crystallinity of the system is driven by halogen-bonded…

116 Chemical sciencesInorganic chemistry1600Supramolecular chemistryIonic bonding010402 general chemistry01 natural sciencesCatalysissupramolecular chemistryCrystallinitychemistry.chemical_compoundLiquid crystal1503ta116Alkylchemistry.chemical_classificationHalogen bondionic liquid crystal010405 organic chemistryChemistryCommunicationChemistry (all)Self-assemblyGeneral MedicineGeneral Chemistryself-assemblyFluorophobic effect; Halogen bonding; Ionic liquid crystals; Self-assembly; Supramolecular chemistry; Chemistry (all); CatalysisCommunicationsfluorophobic effect0104 chemical sciencesCrystallographyhalogen bondingIonic liquidIonic liquid crystalsSettore CHIM/07 - Fondamenti Chimici Delle TecnologieFluorophobic effectSelf-assemblyHalogen bondingionic liquid crystalsSupramolecular chemistry
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Nullità sopravvenuta (una breve riflessione propositiva)

2022

Il contributo ha ad oggetto una riflessione propositiva sulla cosiddetta nullità sopravvenuta, valorizzando nei contratti ad efficacia non ancora esaurita la vigenza della fonte. Da ciò può dedursi che in ogni momento e fase dinamica del contratto sia implicito un costante ancoraggio alla sua giustificazione, che imporrebbe una reiterazione del giudizio di validità. Così che per i casi nei quali il contratto si ponga in un secondo momento in contrasto con regole di validità poste dall’ordinamento per effetto di una circostanza successiva alla sua formazione, pur in senso diacronico (rispetto all’origine), sia ravvisabile una ipotesi di nullità successiva

:CIENCIAS JURÍDICAS Y DERECHO [UNESCO]usura sopravvenutaUNESCO::CIENCIAS JURÍDICAS Y DERECHOcontratti di duratanullità sopravvenuta
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Coronavirus ed esonero da responsabilità per inadempimento di obbligazione ex art. 1218 c.c.: impossibilità sopravvenuta oppure inesigibilità della p…

2020

La crisi economica e la fase emergenziale di questi giorni sollecitano l?attenzione sull?influenza del diffondersi del contagio da Coronavirus sull?esecuzione dei rapporti obbligatori. Con particolare riferimento alla responsabilità del debitore da inadempimento di obbligazione, ex art. 1218 c.c., ci si chiede se l?epidemia COVID-19 , nel determinare l?applicazione di un regime normativo che esclude la relativa imputabilità al debitore, configuri un?ipotesi di impossibilità sopravvenuta oppure di inesigibilità della prestazione. Prima facie, le menzionate figure sembrerebbero coincidere; invero, ad un?analisi più attenta, identificano categorie diverse. Dall?analisi di siffatti profili diff…

:CIENCIAS JURÍDICAS [UNESCO]inadempimentotutela della saluteUNESCO::CIENCIAS JURÍDICASresponsabilità del debitoresolidarietàImpossibilità sopravvenutainesigibilità della prestazione
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Abordaje supracerebeloso transtentorial suprameatal a la totalidad de la región mediobasal del lóbulo temporal

2015

La región mediobasal del lóbulo temporal (RMT), por su compleja anatomía y su localización, constituye a día de hoy un reto neuroquirúrgico de primer orden. El desarrollo de la cirugía microquirúrgica de base craneal y los nuevos horizontes de la cirugía endoscópica siguen sin ofrecer un abordaje óptimo para aquellas lesiones asentadas en la totalidad de la RMT (principalmente oncológicas y vasculares). La exposición parcial de la RMT y el compromiso de estructuras neurovasculares no implicadas en la patología a tratar suponen los principales inconvenientes a la hora de plantear el abordaje de dichas lesiones. Las lesiones con frecuencia tumorales, que afectan la totalidad de la RMT, requie…

:CIENCIAS MÉDICAS ::Cirugía ::Neurocirugía [UNESCO]petrosectomía suprameatalregión mediobasal temporalUNESCO::CIENCIAS MÉDICAS ::Cirugía ::Neurocirugíaabordajes neuroquirúrgicossupracerebeloso transtentorial
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Esclerectomía profunda no perforante con espolonectomía e implante supraciliar : una nueva propuesta para la cirugía no penetrante del glaucoma

2013

Actualmente la cirugía del glaucoma se encuentra en evolución. La trabeculectomía es el procedimiento quirúrgico hipotensor más realizado, por lograr grandes disminuciones de la presión intraocular, pero tiene el inconveniente de que al tratarse de un procedimiento penetrante, puede traer consigo mayores complicaciones como la hipotensión y disestesias de la ampolla conjuntival, por ello la cirugía no penetrante goza cada vez de mas defensores. Entre los procedimientos quirúrgicos no penetrantes, la esclerectomía profunda no perforante (EPNP) es la más realizada, con esta técnica el humor acuoso filtra a través de la membrana trabéculodescemética y de allí drena por la vía subconjuntival. S…

:CIENCIAS MÉDICAS::Ciencias clínicas::Oftalmología [UNESCO]glaucoma:CIENCIAS MÉDICAS::Cirugía::Cirugía ocular [UNESCO]oftalmologíacirugía del glaucomaUNESCO::CIENCIAS MÉDICASUNESCO::CIENCIAS MÉDICAS::Ciencias clínicas::Oftalmologíaespolonectomíaimplante supraciliar:CIENCIAS MÉDICAS [UNESCO]UNESCO::CIENCIAS MÉDICAS::Cirugía::Cirugía ocular
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Computations on electroactive molecular materials: from donor–acceptor architectures to supramolecular polymers

2017

En la presente tesis, se ha realizado un estudio teórico exhaustivo sobre una gran variedad de sistemas moleculares electroactivos con propiedades ópticas, electónicas y de autoensamblaje interesantes para ser explotadas en electrónica molecular y ciencia de nuevos materiales. Los resultados del trabajo de investigación se resumen en tres secciones de acuerdo con: Arquitecturas dador–acceptor covalentes Se han caracterizado teóricamente las propiedades electrónicas y ópticas de cromóforos dador–aceptor que absorben luz en todo el espectro visible. En particular, los cálculos DFT han proporcionado información sobre los regioisómeros más interesantes de exTTF-DCF para obtener un máximo benefi…

:CIENCIAS TECNOLÓGICAS::Tecnología de materiales [UNESCO]interacciones no covalentesestructura electrónicaUNESCO::QUÍMICA::Química físicaquímica supramolecular:QUÍMICA::Química física [UNESCO]UNESCO::FÍSICA::Física atómica y nuclear ::Conversión de energíasistemas dador-aceptorquímica computacionalUNESCO::CIENCIAS TECNOLÓGICAS::Tecnología de materiales:FÍSICA::Física atómica y nuclear ::Conversión de energía [UNESCO]
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