Search results for "Microbial"
showing 10 items of 2041 documents
Wpływ usytuowania anody na funkcjonowanie mikrobiologicznego ogniwa paliwowego
2018
Mikrobiologiczne ogniwa paliwowe (MFCs - microbial fuel cells) spełniają podwójną funkcję. Oczyszczają ścieki przy jednoczesnym wytwarzaniu energii elektrycznej. Ta dwubiegunowość wyróżnia technologię MFC spośród stosowanych do tej pory w procesach oczyszczania ścieków innych technologii. Istotnym aspektem do rozwiązania jest optymalizacja działania MFC w celu uzyskania jak najwyższej skuteczności oczyszczania ścieków oraz zwiększenia ilości uzyskiwanej energii elektrycznej. Jednym z rozwiązań jest odpowiednie umieszczenie anody. Praca przedstawia badania dotyczące wpływu usytuowania anody na skuteczność oczyszczania ścieków. Wykazano, że zmiana położenia anody wpływa głównie na czas redukc…
Analysis of the possibility of using stainless steel and copper boride alloy as catalyst for microbial fuel cell fuel electrode= Analiza możliwości z…
2015
wytwarzania energii elektrycznej z substancji odpadowych, jak i technologii oczyszczania ścieków. Ogniwa te charakteryzują się niskimi kosztami inwestycyjnymi. Ze względu na znakomite własności katalityczne, w wysokowydajnych ogniwach paliwowych (np. wodorowo-tlenowych), jako katalizator stosowana jest platyna. Jednak koszt platyny praktycznie uniemożliwia stosowanie jej w MFC. Z tego względu należy poszukiwać innych katalizatorów nie zawierających metali szlachetnych. W mikrobiologicznych ogniwach paliwowych najczęściej stosuje się elektrody grafitowe. Praca przedstawia analizę możliwości wykorzystania stali nierdzewnej oraz stopu Cu-B jako katalizatora elektrody paliwowej w mikrobiologicz…
Molluscan antimicrobial peptides, a review from activity-based evidences to computer-assisted sequences
2011
Antimicrobial peptides (AMPs) represent the most universal immune effectors. Molluscs constitute the second largest animal phylum, after Arthropods, in term of number of species. Only a negligible number has been investigated regarding AMPs. The choice of the species to be studied relied on their economical importance and availability. First studies on molluscan AMPs dated from 1996 and were based on biological activities of biochemical-purified fractions. Such approach released all the original structures we know, with biological activity sometimes different from one isoform to another. Then, molecular biology techniques were applied to molluscan AMPs starting in 1999. Complete screening o…
THE ‘CRUCIFIED AND DEPOSED CHRIST’ OF MUSEO DIOCESANO OF PALERMO, ITALY. SCIENTIFIC STUDIES OF A SICILIAN PAPIER-MȂSCHÉ POLYCHROME SCULPTURE
2022
In this paper we describe scientific investigations on the artwork ‘Crucified and deposed Christ’ from the Diocesan Museum of Palermo. Multidisciplinary studies were carried out to obtain interesting information about constitutive materials and executive techniques of XVIII century Sicilian papier mâsché, as well as about the sculpture state of conservation and the recognition of the previous treatments.Examination of the polychrome sculpture was both non-invasive (IRR, IRC, UV fluorescence, EDXRF spectroscopy X-Radiography) and micro invasive (optical microscopy, scanning electron microscopy with energy dispersive X-ray spectroscopy SEM-EDX).SEM-EDX results showed the use of materials like…
Appraisal of Combined Applications of Trichoderma virens and a Biopolymer-Based Biostimulant on Lettuce Agronomical, Physiological, and Qualitative P…
2020
The current research elucidated the agronomical, physiological, qualitative characteristics and mineral composition of lettuce (Lactuca sativa L. var. longifolia) after treatments with a beneficial fungus Trichoderma virens (TG41) alone or in combination with a vegetal biopolymer-based biostimulant (VBP
Obtaining and research of callus mass of Gentiana lutea L roots
2015
The results of introduction to the culture in vitro Gentiana lutea L. are provided. The influence of phytohormones on growth processes of plant cells is researched, the optimal conditions for cultivation of Gentiana lutea L. are defined and chosen. Biomass extract is obtained and is researched on the presence in it the biologically active substances and antimicrobial activity.
Toward Sustainable PLA-Based Multilayer Complexes with Improved Barrier Properties
2019
Poly(lactic acid) or PLA is currently considered as one of the most promising substitutes of conventional plastics, with low environmental impact, especially for food packaging applications. Nevertheless, some drawbacks, such as high permeability to oxygen, are still limiting its industrial applications. The objective of this study was to highly increase the oxygen barrier performance of PLA without compromising its sustainable nature and following the principles of circular economy perspective. Coproducts coming from mill industries, such as wheat gluten proteins (WG), were used to produce PLA-WG-PLA multilayer complexes with improved barrier performance. Different technologies of industri…
Effets du mode de travail du sol sur les microorganismes à l'échelle du profil cultural
2009
Soil tillage modifies the location of crop residues and soil structure and affects microbial populations and activities such as mineralization of soil organic matter. The aim of this work was to compare the effect of two tillage systems (traditional mouldboard ploughing, LT, and reduced tillage, TR) on crop residues distribution and soil structure as well as their consequences on soil microbial biomass (BM), the potential activity of C mineralization (Cmin) and soil bacterial community structure (through T-RFLP). In order to study simultaneously the effects of soil structure modifications and crop residues distribution on these microbial parameters we used a stratified sampling scheme based…
Efficacy and safety of photodynamic therapy with RLP068 for diabetic foot ulcers: a review of the literature and clinical experience
2020
This article is the second part of a literature review concerning diabetic foot ulcers (DFUs) and the use of antimicrobial photodynamic therapy (PDT). PDT involves the topical application of a photosensitiser into the tissue, followed by illumination that induces the formation of reactive oxygen species (ROS). PDT provides bacterial inactivation and promotes wound healing, and it can be used to manage the infection and microbial colonisation of DFUs. It has pivotal advantages in comparison with chemotherapeutics, such as no potential to induce resistance, and a wide spectrum of activity. Tetracationic Zn(II) phthalocyanine derivatives have been developed for PDT. Among these, we would like …
Dynamics of soil organic matter pools after agricultural abandonment
2014
Changes of land use from croplands to natural vegetation usually increase Carbon (C) stocks in soil. However, the contribution of old and new C to various pools still is not clearly analyzed.We measured the 13C signature of soil organic carbon (SOC) pools after vegetation change from vineyard (C3) to grassland (C4) under Mediterranean climate to assess the changes of old and new C in total SOC, microbial biomass (MB), dissolved organic C (DOC), and CO2 efflux from soil. Development of the perennial grass Hyparrhenia hirta (C4) on vineyard abandoned for 15 or 35 years ago increased C stocks for 13% and 16%, respectively (in the upper 15 cm). This increase was linked to the incorporation of n…