1,721,145 research outputs found
Shiro Takatani, ST / LL
Full text linkL'articolo offre un'analisi dello spettacolo di Takatani mettendo al centro le categoria della rapporto tra Visibile e Invisibile, di mutamento di scala e di prospettiva, di percezione e di Figura/oggetto come presenza scenica alternativa al performer in carne ed ossa
Duda Paiva. Blind (2015)
Full text linkL'articolo propone alcune riflessioni sullo spettacolo Blind, mettendone in evidenza procedimenti, fonti di ispirazione, drammaturgia della luce e moltiplicazione delle presenze sceniche
Ebbrezze lunari nella poetica di Paul Scheerbart: la scena come corpo organico di luce, trasparenza, colore
Full text linkL'articolo analizza La danza delle comete di Paul Scheerbart mettendone in evidenza le implicazioni sceniche e l'appartenenza al contesto della sperimentazione primonovecentesca
PySpectro: A modular 3D printed, machine learning assisted optical device for recognition and quantification of samples
No full textOver the past decade, science and technology have achieved great advancements driven by the synergy between materials and manufacturing processes; coupled with the growth of informatics, which offers powerful tools to process and interpret data, new analytical devices have been developed. This work describes a modular 3D printed instrument that utilizes the AS7262 light sensor coupled with a LED to perform absorbance and reflectance measurements. The mode of operation can be switched by conveniently attaching different 3D printed parts. An Arduino Nano is used for operating the electronics, and a python-based software is employed for data handling. The device, beside spectra acquisition, allows rapid identification and quantification of samples through a database and machine learning (ML) algorithms. A recursive methodology for regression specifically designed allowed sample quantification in a range spanning around 2.5 orders of magnitude with errors generally below 10%. PySpectro was used on homogeneous solution and on PADs (Paper-based Analytical Devices) for food dyes and phosphomolybdic assay for phosphate. The device may find applications in any colorimetric detection also outside the laboratory environment and can be a time-saving tool for fast preliminary determinations or educational purposes
A novel strategy for fabrication, activation and cleaning of fully 3D printed flexible planar electrochemical platforms
Full text linkIn recent years, 3D printing of carbon-based conductive filaments has received growing attention for assembling electrodes to be used in a wide variety of electroanalytical devices and applications. Despite the large amount of work present in literature concerning the development of three-dimensional (3D) conductive structures, its potential as dry deposition method for assembling two-dimensional (2D) electrodes to be used in planar configuration is still largely unexplored. In fact, the possibility to rapidly change the geometry of the electrochemical circuits, associated with the reduction of waste and the absence of solvents, which are instead important components of ink and paste formulations, makes this strategy a valid green and efficient alternative to other deposition approaches such as screen-printing technology. We report here a rapid and solvent-free method for assembling fully 3D printed flexible planar electroanalytical platforms (3DEPs) to be used with microliters of liquid. At the same time, a novel protocol for the surface pre-treatment of 3D printed electrodes based on ultrasonication in aqueous NaOH solution followed by electrochemical activation using the same medium, is presented. In addition, the same procedure has proved to be efficient for cleaning the electrode surface after electrochemical passivation, thus confirming the validity of both time-efficient and environmentally-friendly assembling and activation/cleaning procedures developed which allow efficient and reusable electrodes to be produced. Finally, 3DEPs were tested by a proof-of-concept quantification of a commonly used food dye (Brilliant Blue, E-133) in commercial solutions used for homemade food coloring
‘Cose all’italiana’ e alla tedesca ‘in materia di ricreatione’: la circolazione di strumenti, strumentisti e balli fra Mantova e i territori dell’impero romano germanico (1500-1630)
No full text
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Paper-based aptamer-antibody biosensor for gluten detection in a deep eutectic solvent (DES)
Full text linkPaper has been widely employed as cheap material for the development of a great number of sensors such as pregnancy tests, strips to measure blood sugar, and COVID-19 rapid tests. The need for new low-cost analytical devices is growing, and consequently the use of these platforms will be extended to different assays, both for the final consumer and within laboratories. This work describes a paper-based electrochemical sensing platform that uses a paper disc conveniently modified with recognition molecules and a screen-printed carbon electrode (SPCE) to achieve the detection of gluten in a deep eutectic solvent (DES). This is the first method coupling a paper biosensor based on aptamers and antibodies with the DES ethaline. Ethaline proved to be an excellent extraction medium allowing the determination of very low gluten concentrations. The biosensor is appropriate for the determination of gluten with a limit of detection (LOD) of 0.2 mg L−1 of sample; it can detect gluten extracted in DES with a dynamic range between 0.2 and 20 mg L−1 and an intra-assay coefficient of 10.69%. This approach can be of great interest for highly gluten-sensitive people, who suffer from ingestion of gluten quantities well below the legal limit, which is 20 parts per million in foods labeled gluten-free and for which highly sensitive devices are essential. Graphical abstract: [Figure not available: see fulltext.
An Effective Label-Free Electrochemical Aptasensor Based on Gold Nanoparticles for Gluten Detection
Full text linkNanomaterials can be used to modify electrodes and improve the conductivity and the performance of electrochemical sensors. Among various nanomaterials, gold-based nanostructures have been used as an anchoring platform for the functionalization of biosensor surfaces. One of the main advantages of using gold for the modification of electrodes is its great affinity for thiol-containing molecules, such as proteins, forming a strong Au-S bond. In this work, we present an impedimetric biosensor based on gold nanoparticles and a truncated aptamer for the quantification of gluten in hydrolyzed matrices such as beer and soy sauce. A good relationship between the Rct values and PWG-Gliadin concentration was found in the range between 0.1–1 mg L−1 of gliadin (corresponding to 0.2–2 mg L−1 of gluten) with a limit of detection of 0.05 mg L−1 of gliadin (corresponding to 0.1 mg L−1 of gluten). The label-free assay was also successfully applied for the determination of real food samples
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