Search results for "raw materials"
showing 10 items of 30 documents
Fungal contaminants in Sicilian livestock feeds and first studies on the enzymatic activity of Aspergillus isolates
2019
The purposes of this study were 1) to determine the total fungal contamination in Sicilian raw materials and livestock, 2) to evaluate the occurrence of Aspergillus spp., Penicillium spp. and Fusarium spp., 3) to identify fungi belonging to the genus Aspergillus and 4) to determine their ability to produce cellulolytic enzymes. Fourteen feed samples were collected in a feed mill near to Palermo (Sicily, Italy). Analysis of the total mycobiota was performed on Sabourad Dextros Agar (SAB) and Potato Dextrose Agar (PDA) and total fungal counts were expressed as CFU/g. Aspergillus spp. isolates were selected on the basis of the frequency of isolation and identifed using micro and macro-morpholo…
Definizione composizionale delle "Argille Ceramiche" presenti nella Sicilia Nord-Occidentale: Inquadramento geologico e ricadute di carattere archeom…
2006
Resource depletion of a Lithium ion battery cell technology
2018
Lithium-ion batteries (LIBs) are the dominating storage technology for electric vehicles (EVs). Different types of LIBs, using diverse cathode materials are available in the market, such as LiMn2O4, Li(Ni1/3Co1/3Mn1/3)O2. The cathodes contain a wide range of raw materials (RMs), among which e.g. cobalt is in the 2017 list of CRMs for the Europe Union (EU). CRMs are both of high economic importance for the EU, and vulnerable to supply security. In the last years, the increasing demand of LIBs has triggered a growing interest in the need to ensure the security and the sustainability of the supply of the CRMs used in LIBs and in general in EVs. In this context, lithium rich layered oxides from…
Critical Raw Materials and Supply Chain Disruption in the Energy Transition
2022
The energy transition towards efficient energy production, transport, and use, renewable energy (RE) technologies and innovative energy management brings benefits to reducing greenhouse gas (GHG) emissions and achieving climate targets. The transition requires resources, minerals, metals, and materials for RE technologies themselves, for example, solar photovoltaics (PV), hydrogen fuel cell vehicles (HFCVs) as well as innovative supporting technologies for variable RE, for example, energy storage systems (ESSs). This requirement of resources and materials occurs over the whole supply chain of the technologies, from the extraction of resources, the manufacture of technology, and the deployme…
Mountain Environment and Landscape in prehistoric Sicily: The Madonie region (Palermo, Italy)
2008
The present paper would like to show a research project still in progress, presenting the first preliminary archaeological data. The aim of the Madonie project is to analyse mobility strategies and the use of a mountain territory by prehistoric and historic age population, relating geomorphological features, raw material sources and landscape to settlements. In this occurence we are going to discuss about the prehistoric periods.
Prehistoric Settlement and Population in the Madonie Mountains. New Data from the Archaeological Survey
2010
The aim of the Madonie research project is to analyse mobility strategies and the use of a mountainous territory by relating geomorphologic features, raw material sources and landscape to the prehistoric settlement. For this purpose we planned an intensive and systematic survey of sample areas, selected on geo-morphological, altimetric and archaeological criteria, correlated to a palaeoenvironmental investigation based on the study of palynological sequence samples coming from wet areas of the Madonie territory and from archaeological deposits. Le projet de recherche sur la Madonie analyse les stratégies de mobilité et l’exploitation du territoire de montagne, en reliant les caractéristique…
Novel monolithic materials for miniaturized separation techniques
2015
En esta tesis, se describe el uso de nuevos materiales porosos polimericos y su potencial aplicación en técnicas de separación miniaturizadas. La primera sección (capítulos 1-3), contiene una introducción general, donde el impacto de los materiales polímeros (capítulo 2)en cromatografía es discutido. En el capítulo 3, se presenta una introducción a la caracterización de algunos polímeros y aceites esenciales. Los capítulos 1-3 se escribieron siguiendo la normativa de la Universidad Valencia. La segunda parte de esta tesis está enfocada en la preparación, caracterización y aplicación de nuevos materiales monoíticos usados en cromatografía líquida capilar y electrocromatografía (CEC). En esto…
Współczesna wojna - model klasyfikacyjny surowców krytycznych
2016
The paper adresses the problem of the list of critical raw materials for the European Union. The theoretical model of classification of the critical raw materials was presented. The presented model is based on two variables: index of the compatibility (substitutability index) and recycling index.
The use of botanical raw materials in hair dyeing
2021
Rynek kosmetyczny bogaty jest w produkty umożliwiające zmianę koloru włosów. Dostępne są trzy możliwości koloryzacji chemicznej zależne od czasu utrzymywania się docelowego koloru. Wśród nich wyróżnia się farbowanie krótkotrwałe, półtrwałe oraz długotrwałe. Przy użyciu składników syntetycznych możliwe jest uzyskanie pełnego przekroju kolorystycznego. Doniesienia o niepożądanych skutkach ubocznych farb chemicznych, zarówno dotyczących skóry głowy jak i struktury włosów przemawiają za powrotem naturalnych sposobów koloryzacji włosów, i za rozwojem tego kierunku. Celem opracowania było przybliżenie możliwości zastosowania surowców roślinnych celem koloryzacji włosów. Scharakteryzowano następuj…
Natural Ingredients of Transdermal Drug Delivery Systems as Permeation Enhancers of Active Substances through the Stratum Corneum
2023
In recent years, significant progress has been made in transdermal drug delivery systems, but there is still a search for enhancers that can improve the absorption of active substances through the stratum corneum. Although permeation enhancers have been described in the scientific literature, the use of naturally occurring substances in this role is still of particular interest, because they can offer a high level of safety of use, with a low risk of skin irritation, and high efficiency. In addition, these ingredients are biodegradable, easily available, and widely accepted by consumers due to the growing trust in natural compounds. This article provides information on the role of naturally…