Life cycle assessment of photovoltaic implementation: an Italian case study

The energy efficiency is the possibility and ability to carry out a production process consume with the involves of less energy and minor environmental impact. Life Cycle Assessment is one of the major tools involved in the economic, social and environmental evaluation. The aim of this work is the LCA application to an Italian company that provides to install a photovoltaic plant for the energy self-maintenance, in order to break down costs and environmental impacts. The photovoltaic business can be an interesting solution especially for companies which consume more energy during the day. In the case study was highlighted that an average of 400.00 €/month was spent, equal to about 900 kWh / month. The company installed a 10 kWp photovoltaic system and with this implementation the energy consumption diminished of 84% and the costs of 57%

The function of integron-associated gene cassettes in Vibrio species: The tip of the iceberg

The integron is a genetic element that incorporates mobile genes termed gene cassettes into a reserved genetic site via site-specific recombination. It is best known for its role in antibiotic resistance with one type of integron, the class 1 integron, a major player in the dissemination of antibiotic resistance genes across Gram negative pathogens and commensals. However, integrons are ancient structures with over 100 classes (including class 1) present in bacteria from the broader environment. While, the class 1 integron is only one example of an integron being mobilized into the clinical environment, it is by far the most successful. Unlike clinical class 1 integrons which are largely found on plasmids, other integron classes are found on the chromosomes of bacteria and carry diverse gene cassettes indicating a non-antibiotic resistance role(s). However, there is very limited knowledge on what these alternative roles are. This is particularly relevant to Vibrio species where gene cassettes make up approximately 1-3% of their entire genome. In this review, we discuss how emphasis on class 1 integron research has resulted in a limited understanding by the wider research community on the role of integrons in the broader environment. This has the capacity to be counterproductive in solving or improving the antibiotic resistance problem into the future. Furthermore, there is still a significant lack of knowledge on how gene cassettes in Vibrio species drive adaptation and evolution. From research in Vibrio rotiferianus DAT722, new insight into how gene cassettes affect cellular physiology offers new alternative roles for the gene cassette resource. At least a subset of gene cassettes are involved in host surface polysaccharide modification suggesting that gene cassettes may be important in processes such as bacteriophage resistance, adhesion/biofilm formation, protection from grazers and bacterial aggregation. © 2013 Rapa and Labbate

Filiera della canapa industriale (Cannabis sativa L.): sfide e nuove opportunità

La Cannabis Sativa è una pianta utilizzata in maniera sempre maggiore in diverse filiere del mercato: agro- alimentare, tessile, edile, cosmetico e della chimica verde, sostituendo prodotti "classici" con nuovi prodotti più performanti dal punto di vista ambientale e tecnologico. La "canapa industriale" ha un contenuto in tetraidriocannabinolo (THC) inferiore allo 0,2%, che ne permette la coltivazione e la commercializzazione in Europa (Reg. CE n.1673/2000 e Reg. CE n.73/2009). Ampiamente coltivata in Italia e nel mondo fino alla metà del secolo scorso, principalmente per ottenerne prodotti da impiegare nell'industria tessile, motivazioni economiche e politiche (Legge 22/12/1975 n.685) ne hanno segnato il declino. Oggi comunque questa coltura sta conoscendo un nuovo periodo di espansione per le caratteristiche e i molteplici usi che la rendono particolarmente vicina ai principi della green economy. In Europa la superficie coltivata ha raggiunto il valore di circa 25.000 ha nel 2016, in crescita del 37% rispetto al 2014. Il ritorno della canapicoltura sta avvenendo su basi completamente diverse rispetto al passato, quando l'unico prodotto vendibile era la fibra lunga, per la creazione di tessuti e cordami, ottenuta attraverso procedimenti che richiedevano enormi impieghi di manodopera. Oggi, dal punto di vista delle possibilità d'impiego, la canapa presenta caratteristiche di versatilità che rendono questa materia prima utilizzabile in molti settori per le sue proprietà: produzione di carta (la canapa ha una resa in polpa per ettaro 4 volte superiore rispetto al legno, oltre a richiedere 1/7 del quantitativo di solventi chimici), industria chimica, industria alimentare (attraverso l'impiego di olio e farine ricavate dai semi della canapa) e produzione di energia pulita. Inoltre è importante ricordare la capacità fitodepuratrice della canapa (già sfruttata nel nostro Paese per il recupero dell'area industriale di Porto Marghera nel Veneziano). Le radici fittonanti riescono a raggiungere profondità maggiori rispetto ad altre piante a rapido accrescimento, inoltre gli inquinanti vengono accumulati in foglie e semi, permettendo un utilizzo sicuro della fibra. Dunque la canapa, pur essendo una coltura tradizionale, ben si presta a molteplici utilizzazioni innovative, che la identificano come una delle colture erbacee più promettenti nello scenario agricolo internazionale. Il presente lavoro ha l'obiettivo di analizzare il mercato e le potenzialità di crescita della canapa nei differenti settori, tenendo in considerazione anche le iniziative finalizzate a promuovere e sostenere, sul territorio, un modello di sviluppo diffuso fondato sulla valorizzazione delle risorse presenti a livello locale e, quindi, sull'integrazione delle diverse attività economiche potenzialmente interessate all'impiego della canapa

Deletion of Integron-Associated Gene Cassettes Impact on the Surface Properties of Vibrio rotiferianus DAT722

Background: The integron is a genetic recombination system that catalyses the acquisition of genes on mobilisable elements called gene cassettes. In Vibrio species, multiple acquired gene cassettes form a cassette array that can comprise 1-3% of the bacterial genome. Since 75% of these gene cassettes contain genes encoding proteins of uncharacterised function, how the integron has driven adaptation and evolution in Vibrio species remains largely unknown. A feature of cassette arrays is the presence of large indels. Using Vibrio rotiferianus DAT722 as a model organism, the aim of this study was to determine how large cassette deletions affect vibrio physiology with a view to improving understanding into how cassette arrays influence bacterial host adaptation and evolution. Methodology/Principal Findings: Biological assays and proteomic techniques were utilised to determine how artificially engineered deletions in the cassette array of V. rotiferianus DAT722 affected cell physiology. Multiple phenotypes were identified including changes to growth and expression of outer membrane porins/proteins and metabolic proteins. Furthermore, the deletions altered cell surface polysaccharide with Proton Nuclear Magnetic Resonance on whole cell polysaccharide identifying changes in the carbohydrate ring proton region indicating that gene cassette products may decorate host cell polysaccharide via the addition or removal of functional groups. Conclusions/Significance: From this study, it was concluded that deletion of gene cassettes had a subtle effect on bacterial metabolism but altered host surface polysaccharide. Deletion (and most likely rearrangement and acquisition) of gene cassettes may provide the bacterium with a mechanism to alter its surface properties, thus impacting on phenotypes such as biofilm formation. Biofilm formation was shown to be altered in one of the deletion mutants used in this study. Reworking surface properties may provide an advantage to the bacterium's interactions with organisms such as bacteriophage, protozoan grazers or crustaceans. © 2013 Rapa et al

Differential expression profiles of cell-to-matrix-related molecules in adrenal cortical tumors: Diagnostic and prognostic implications

The molecular mechanisms of adrenocortical carcinoma development are incompletely defined. De-regulation of cellular-to-extracellular matrix interactions and angiogenesis appear among mechanisms associated to the malignant phenotype. Our aim was to investigate, employing PCR-based array profiling, 157 molecules involved in cell-to-matrix interactions and angiogenesis in a frozen series of 6 benign and 6 malignant adrenocortical neoplasms, to identify novel pathogenetic markers. In 14 genes, a significant dysregulation was detected in adrenocortical carcinomas as compared to adenomas, most of them being downregulated. Three exceptions—hyaluronan synthase 1 (HAS-1), laminin α3 and osteopontin genes—demonstrated an increased expression in adrenocortical carcinomas of 4.46, 4.23 and 20.32-fold, respectively, and were validated by immunohistochemistry on a series of paraffin-embedded tissues, including 20 adenomas and 73 carcinomas. Osteopontin protein, absent in all adenomas, was expressed in a carcinoma subset (25/73) (p = 0.0022). Laminin α3 and HAS-1 were mostly expressed in smooth muscle and endothelial cells of the vascular network of both benign and malignant adrenocortical tumors. HAS-1 was also detected in tumor cells, with a more intense pattern in carcinomas. In this group, strong expression was significantly associated with more favorable clinicopathological features. These data demonstrate that cell-to-matrix interactions are specifically altered in adrenocortical carcinoma and identify osteopontin and HAS-1 as novel potential diagnostic and prognostic biomarkers, respectively, in adrenal cortical tumors

A genomic island integrated into recA of Vibrio cholerae contains a divergent recA and provides multi-pathway protection from DNA damage

© 2015 Society for Applied Microbiology and John Wiley & Sons Ltd. Lateral gene transfer (LGT) has been crucial in the evolution of the cholera pathogen, Vibrio cholerae. The two major virulence factors are present on two different mobile genetic elements, a bacteriophage containing the cholera toxin genes and a genomic island (GI) containing the intestinal adhesin genes. Non-toxigenic V.cholerae in the aquatic environment are a major source of novel DNA that allows the pathogen to morph via LGT. In this study, we report a novel GI from a non-toxigenic V.cholerae strain containing multiple genes involved in DNA repair including the recombination repair gene recA that is 23% divergent from the indigenous recA and genes involved in the translesion synthesis pathway. This is the first report of a GI containing the critical gene recA and the first report of a GI that targets insertion into a specific site within recA. We show that possession of the island in Escherichia coli is protective against DNA damage induced by UV-irradiation and DNA targeting antibiotics. This study highlights the importance of genetic elements such as GIs in the evolution of V.cholerae and emphasizes the importance of environmental strains as a source of novel DNA that can influence the pathogenicity of toxigenic strains

Clemson University’s Teacher Learning Progression Program: Personalized Advanced Credentials for Teachers

This chapter provides an overview of Clemson University\u27s Teacher Learning Progression program, which offers participating middle school science, technology, engineering, and/or mathematics (STEM) teachers with personalized advanced credentials. In contrast to typical professional development (PD) approaches, this program identifies individualized pathways for PD based on teachers\u27 unique interests and needs and offers PD options through the use of a “recommender system”—a system providing context-specific recommendations to guide teachers toward the identification of preferred PD pathways and content. In this chapter, the authors introduce the program and highlight (1) the data collection and instrumentation needed to make personalized PD recommendations, (2) the recommender system, and (3) the personalized advanced credential options. The authors also discuss lessons learned through initial stages of project implementation and consider future directions for the use of recommender systems to support teacher PD, considering both research and applied implications and settings