Search results for "Materiali"

Green Composites Based on Mater-Bi® and Solanum lycopersicum Plant Waste for 3D Printing Applications

2023

3D printability of green composites is currently experiencing a boost in importance and interest, envisaging a way to valorise agricultural waste, in order to obtain affordable fillers for the preparation of biodegradable polymer-based composites with reduced cost and environmental impact, without undermining processability and mechanical performance. In this work, an innovative green composite was prepared by combining a starch-based biodegradable polymer (Mater-Bi®, MB) and a filler obtained from the lignocellulosic waste coming from Solanum lycopersicum (i.e., tomato plant) harvesting. Different processing parameters and different filler amounts were investigated, and the obtained sample…

L'igiene sociale nel XIX e XX secolo. I lavatoi pubblici

2014

In the renewal of hygienic standards promoted by European Nations, many build-ings had to align themselves with the latest dictates of medical science and of "hy-gienist" engineers: one of these were the public laundries. The Exhibition of Hygiene clarified the objectives to be followed in the design: first of all, the laundries had to satisfy the needs of public health, preventing the spread of infectious germs and ensuring the health of the people, often subjected to serious influences for the infected garments and the moisture that they endured for most of the day; at the same time, these buildings had to create the decorum in the popular districts of the city and therefore they had to b…

The brighter side of materialism : Managing impressions on social media for higher social capital

2022

Individuals adjust their behavior on social media to varying extent, and commonly in their idealized way. Most studies have focused on the problems associated with materialism and social media use, yet their potential positive contributions remain less clear. In fact, impression management holds potential for both negative and positive: it has been linked with materialistic attitudes, but also increased amounts of self-reported social capital. This study examines how young people's materialistic values connect with status-seeking impression management on social media, and subsequently to social capital, within the same model. Eight hundred Finnish participants aged 15–19 participated in our…

Novel organo-modifier for thermally-stable polymer-layered silicate nanocomposites

2015

A new novel approach for the stabilisation of polymer-clay nanocomposites has been investigated based on reacting chemically an antioxidant function, a hindered phenol moiety, with an organic modifier based on a quaternary ammonium salt. The chemically linked antioxidant-containing organic modifier (AO-OM) was then introduced into natural montmorillonite (MMt) through a cation-exchange reaction resulting in antioxidant-containing organo-modified clay (AO-OM-MMt). The new antioxidant-containing modified clay, along with other organo-modified clays having a similar organo-modifier but without the reacted antioxidant, were characterised by spectroscopic, thermogravimetric and x-ray diffraction…

“I Have Karelia in My Soul” – Intra-action of Students, Seniors and Artefacts in a Community-Engaged Service-Learning Collaboration

2022

AbstractIn this chapter we examine a foreign language learning environment in a community-engaged setting in a Canadian city through a new materialist lens. As part of a service-learning project, Canadian students of Finnish language and culture visit a Finnish language seniors’ centre regularly to participate in different activities and spend time with the Finnish-speaking seniors. We examine the assemblage of the participants (seniors and students) and one artefact, a map, and offer a close analysis of the intra-action that takes place during one visit at the centre. In our analysis, our service-learning collaboration does not merely give a voice and agency to seniors. Rather, the seniors…

Sosiomateriaalinen näkökulma vuorovaikutukseen muuttuvissa työtiloissa

2022

Työelämään ja organisaatioihin ovat viime vuosina vaikuttaneet monet eri muutokset. Yksi voimakkaimmista muutoksista koskee sitä, missä töitä tehdään eli työnteon tiloja. Tutkimuksissa on tarkasteltu muun muassa tilojen roolia ihmisten välisen vuorovaikutuksen edistämisessä, työntekijöiden oppimisen tukemisessa sekä inklusiivisuuden ja monimuotoisuuden vahvistamisessa. Viime aikoina huomiota on kiinnitetty erityisesti siihen, miten tilat vaikuttavat ihmisten toimijuuteen eli kykyyn ja mahdollisuuksiin toimia tai vaikuttaa erilaisiin työhön liittyviin tilanteisiin. Tässä puheenvuorossa keskityn siihen, miten tilojen ja ihmistoimijuuden välistä suhdetta voidaan tutkia niin kutsutusta sosiomat…

Peter E. Gordon: Adorno and Existence

2017

Ultrasensitive and highly specific detection of iodine ions using zirconium (IV)-enhanced oxidation

2022

Nuclear energy has significantly promoted the development of human society. However, nuclear pollution caused by nuclear accidents can lead to significant hazards to the environment and human health. As a major radioactive product, radioactive iodine (mainly existing as I−) detection has attracted significant attentions. In this study, zirconium(IV) is used to enhance the oxidation of environmental I− to form I2. Subsequently, the generated I2 oxidizes the chemical chromogenic substrate 3,3′,5,5′-tetramethylbenzidine, which is used for I− detection and realizes an ultralow limit of detection (LoD) of 0.176 nM. The LoD of our method, to the best of our knowledge, is the lowest among those of…

The Ideal Learner as Envisioned by Can Do Statements and Grammar Revisions: How Textbook Agency Is Constructed

2022

AbstractIn this chapter, we analyse the features of textbooks that enable and facilitate their role as material agents in the classroom. Rather than analyse the ways textbooks are used in interaction with humans, we analyse the elements in the textbook itself that facilitate intra-action and the ensuing material agency. Based on a discursive analysis of self-assessment in one textbook and discussing that construct against the Finnish national core curriculum and previous research, we present an ‘ideal imaginary’ of classroom activities as construed in the textbook. This helps us understand the textbooks in their pedagogical ergonomics; i.e. as socio-material in the classroom. We conclude by…

Comportamento al creep di biocompositi a base di PLA in presenza di irraggiamento UV

2018

Negli ultimi anni, l’interesse nei confronti dei biocompositi (spesso chiamati “compositi verdi”), realizzati con matrici polimeriche biodegradabili/compostabili e riempitivi organico-naturali ha conosciuto un livello crescente di interesse, sia da parte del mondo accademico che dell’industria. La letteratura fornisce numerose informazioni riguardo il comportamento di tali materiali (in particolare, riguardo il comportamento meccanico), ma di contro sono disponibili solo pochi dati riguardo il comportamento a creep [1] e, a nostra conoscenza, non sono disponibili studi sistematici riguardo il comportamento a creep sotto azione di raggi ultravioletti. Ci siamo quindi occupati di condurre uno…