Catalogare il Patrimonio Scientifico e Tecnologico: da SIC a STS a PST, storia di un percorso (e di una collaborazione)

L'iter effettuato per la messa a punto della scheda <"PST - Patrimonio Scientifico e Tecnologico" licenziata dall'Istituto Centrale del Catalogo e la Documentazione (ICCD), presentata in anteprima dal Ministero per i Beni e le Attività Culturali il 13 ottobre 200

STUDIO DELLA SEPARAZIONE DI FASE CON I METODI DEGLI AUTOMATISMI CELLULARI

We investigate the dynamical behaviour of the phase separation in binary mixtures using a variation on the Rothman Keller cellular automation, in which particles of type A(B) move toward domains of greater concentration of A(B). Domain growth and systems morphologies are determined, via pair correlation function, finding that: 1) the characteristic domain size grows as R(t)~t1/3; 2) the configurations of the mixtures at different times are self-similar

cpDNA barcoding by combined End-Point and Real-Time PCR analyses to identify and quantify the main contaminants of oregano (Origanum vulgare L.) in commercial batches

Oregano (Origanum vulgare L.) is a flowering plant that belongs to the mint family (Lamiaceae). It is used as a culinary herb and is often commercialized as a fine powder or a mixture of small fragments of dried leaves, which makes morphological recognition difficult. Like other commercial preparations of drugs and spices, the contamination of oregano mixtures with vegetable matter of lower quality, or the use of generic misleading names, are frequent and stress the need to develop a molecular traceability system to easily, quickly, and cheaply unveil these scams. The DNA-based analytical approach known as cpDNA barcoding is particularly suited for fraud identification in crop plant species (fresh products and food derivatives), and it represents a promising traceability tool as an alternative or complement to traditional detection methods. In the present study, we used a combined approach based on both qualitative and quantitative cpDNA barcoding with end-point and real-time polymerase chain reaction (PCR) analyses to assess the type and degree of contamination in commercial batches of common oregano. In a preliminary qualitative screening, we amplified, cloned, and sequenced a number of universal trnH-psbA- and trnL-barcoded regions, to identify the main contaminants in the samples under investigation. On the basis of these findings, we then developed and validated a species-specific and sequence-targeted method of testing for the quantitative assessment of contaminants, using trnL gene intron assays. Surprisingly, the results obtained in our case study indicated an almost total absence of O. vulgare in the commercial batches analyzed, but a high presence of group I contaminants (Satureja pilosa Velen.), and a moderate presence of group II contaminants (Cistus lanidifer L./Cistus albidus)

Attraverso lo sguardo del viandante

Il Saggio illustra il progetto scientifico e allestitivo della mostra temporanea "Il corpo e l'anima" ospitata dal Complesso Museale del Santa Maria della Scala di Siena dal dicembre 2014 al maggio 2015

Esperienze didattiche universitarie con strumentaria storica odontoiatrica

L'utilizzo delle Collezioni di strumentaria storica odontoiatrica quale valido strumento didattico nei corsi di Storia della Medicina per il CL Igiene dentale e il CLM di Odontoiatria

I Valori del Museo. Politiche di indirizzo e strategie di gestione.

Il volume tratta i temi più recenti nell'ambito della Museologia Scientifica: dai nuovi criteri per la valutazione del bene culturale alle recenti tecnologie per il restauro di un bene scientifico; dalle schede catalografiche approntate con l'ICCD per le varie tipologie di beni scientifici alle moderne indicazioni per gli allestimenti delle Collezioni scientifiche

Smooth pursuits decrease balance control during locomotion in young and older healthy females.

Dynamic balance control-characterised as movement of the trunk and lower limbs-was assessed during fixation of a fixed target, smooth pursuits and saccadic eye movements in ten young (22.9 ± 1.5 years) and ten older (72.1 ± 8.2 years) healthy females walking overground. Participants were presented with visual stimuli to initiate eye movements, and posture and gaze were assessed with motion analysis and eye tracking equipment. The results showed an increase in medial/lateral (ML) trunk movement (C7: p = 0.012; sacrum: p = 0.009) and step-width variability (p = 0.052) during smooth pursuits compared to a fixed target, with no changes for saccades compared to a fixed target. The elders demonstrated greater ML trunk movement (sacrum: p = 0.037) and step-width variability (p = 0.037) than the younger adults throughout, although this did not interact with the eye movements. The findings showed that smooth pursuits decreased balance control in young and older adults similarly, which was likely a consequence of more complicated retinal flow. Since healthy elders are typically already at a postural disadvantage, further decreases in balance caused by smooth pursuits are undesirable

MOD derived pyrochlore films as buffer layer for all-chemical YBCO coated conductors

We report a detailed study performed on La2Zr2O7 (LZO) pyrochlore material grown by Metal-Organic Decomposition (MOD) method as buffer layers for YBa2Cu3O7-x (YBCO) coated conductors. High quality epitaxial LZO thin films have been obtained on single crystal (SC) and Ni-5%at.W substrates. In order to evaluate structural and morphological properties, films have been characterized by means of X-ray diffraction analyses (XRD), atomic force microscope (AFM) and scanning electron microscope (SEM). Precursors solutions and heat treatments have been studied by thermogravimetric analyses (TG-DTA-DTG) and infrared spectra (FT-IR) with the aim of optimizing the annealing process. Thin films of YBCO have been deposited by pulsed laser ablation (PLD) on this buffer layers. The best results obtained on SC showed YBCO films with critical temperature values above 90 K, high self field critical current density values (Jc > 1 MA/cm2) and high irreversibility field values (8.3 T) at 77 K together with a rather high depinning frequency vp (0.5 T, 77 K)>44 GHz as determined at microwaves. The best results on Ni-5%at.W has been obtained introducing in the heat treatment a pyrolysis process at low temperature in air in order to remove the residual organic part of the precursor solution