Search results for "microbial"
showing 10 items of 2041 documents
A microcosm experiment to evaluate the influence of location and quality of plant residues on residue decomposition and genetic structure of soil mic…
2007
The effects of location (soil surface vs. incorporated in soil) and nature of plant residues on degradation processes and indigenous microbial communities were studied by means of soil microcosms incubation in which the different soil zones influenced by decomposition i.e. residues, soil adjacent to residues (detritusphere) and distant soil unaffected by decomposition (bulk soil) were considered. Plant material decomposition, organic carbon assimilation by the soil microbial biomass and soil inorganic N dynamics were studied with 13 C labelled wheat straw and young rye. The genetic structure of the community in each soil zone were compared between residue locations and type by applying B- a…
Chemical composition and antimicrobial activity of the essential oil ofPhlomis ferruginea Ten. (Lamiaceae) growing wild in Southern Italy
2006
The essential oil of aerial parts of Phlomis ferruginea (Lamiaceae), growing wild in Southern Italy, was obtained by hydrodistillation and analysed by GC and GC–MS. 60 compounds, representing 92.3% of the oil, were identified. The major components were β-caryophyllene (15.6%), hexadecanoic acid (12.8%), germacrene D (8.9%), caryophyllene oxide (6.7%) and α-thujone (5.5%). The evaluation of antimicrobial activity against some bacterial species has been tested. Copyright © 2006 John Wiley & Sons, Ltd.
Microbial Fuel Cell with Ni–Co Cathode Powered with Yeast Wastewater
2018
Wastewater originating from the yeast industry is characterized by high concentration of pollutants that need to be reduced before the sludge can be applied, for instance, for fertilization of croplands. As a result of the special requirements associated with the characteristics of this production, huge amounts of wastewater are generated. A microbial fuel cell (MFC) forms a device that can apply wastewater as a fuel. MFC is capable of performing two functions at the same time: wastewater treatment and electricity production. The function of MFC is the production of electricity during bacterial digestion (wastewater treatment). This paper analyzes the possibility of applying yeast wastewate…
MICROBIAL FUEL CELL WITH Cu-B CATHODE POWERING WITH WASTEWATER FROM YEAST PRODUCTION
2017
With the increasing standard of living, energy consumption increases as well. So, waste production, including wastewater, increases as well. One of the types of waste-water is wastewater from yeast industry. Wastewater from this industry has not only a high pollutants load but it is produced in great amounts as well. Technical devices that can accomplish the wastewater treatment and electricity production from wastewater is a microbial fuel cell. In microbial fuel cells activated sludge bacteria can be used for electricity production during wastewater treatment. The possibility of using the Cu-B alloy as cathode catalyst for microbial fuel cells to wastewater treatment of wastewater from ye…
Electricity Production from Yeast Wastewater in Membrane-Less Microbial Fuel Cell with Cu-Ag Cathode
2023
Wastewater has high potential as an energy source. Therefore, it is important to recover even the smallest part of this energy, e.g., in microbial fuel cells (MFCs). The obtained electricity production depends on the process rate of the electrodes. In MFC, the microorganisms are the catalyst, and the cathode is usually made of carbon material (e.g., with the addition of Pt). To increase the MFC efficiency (and reduce costs by reducing use of the noble metals), it is necessary to search the new cathode materials. In this work, the electricity production from yeast wastewater in membrane-less microbial fuel cells with Cu-Ag cathode was analyzed. In the first place, the measurements of the sta…
Microbial fuel cell with Ni-Co cathode
2017
Wraz ze wzrostem poziomu życia wzrasta zarówno zużycie energii, jak i ilość ścieków. Istnieje jednak możliwość produkcji energii z jednoczesnym oczyszczaniem ścieków. Urządzeniem, które może zrealizować to zadanie jest mikrobiologiczne ogniwo paliwowe. W ogniwach tego typu bakterie osadu czynnego wykorzystane są do produkcji energii podczas oczyszczania ścieków. Jednym z ograniczeń tego rozwiązania jest niska gęstość uzyskiwanego prądu. Możliwe jest jednak podwyższenie tego parametru przy wykorzystaniu odpowiedniego katalizatora elektrod. W artykule przedstawiono możliwość wykorzystania stopu Ni-Co jako katalizatora katody. Badania obejmowały przygotowanie elektrody oraz porównanie zmian st…
Wastewater treatment and electricity production in a microbial fuel cell with Cu–B alloy as the cathode
2019
The possibility of wastewater treatment and electricity production using a microbial fuel cell with Cu&ndash
High pressure processing of food-grade emulsion systems: Antimicrobial activity, and effect on the physicochemical properties
2019
Abstract The use of high pressure processing (HPP) for development of stable emulsion-based delivery systems has been recently increased. Under adequate conditions, application of high pressures modifies the functionality of protein and polysaccharide molecules and significantly promotes the emulsifying activities. Application of high pressures also modulates the emulsion microstructure without any destabilization and gelation of protein molecules. The lipid oxidation in HPP-treated emulsions can be accelerated, particularly with higher pressure levels, while the HPP utilization on emulsions in acidic conditions can highly inhibit the growth of spoilage and pathogenic microorganisms. In thi…
Bioactive Components from Leaf Vegetable Products
2014
Abstract Traditionally, plant-based products have been used for different purposes. From ancient times, people on all continents have long applied poultices and imbibed infusions of indigenous plants. Numerous reports regarding the use of leaf vegetable products for the treatment of many human diseases have been made. Proven medicinal properties include antioxidant, anti-inflammatory, antiallergic, antibacterial, and antiviral effects. Most of these properties can be attributed to its high content in bioactive compounds. Bioactive compounds are secondary metabolites of plants, which are extra nutritional constituents that typically occur in small quantities in foods. They are being intensiv…
Ligands affecting silver antimicrobial efficacy on Listeria monocytogenes and Salmonella enterica
2013
Although silver is being extensively used in food or other applications as the key component to control microbial proliferation, many factors affecting its real potential are still unknown. In the present work, the presence of specific ligands or the contents in organic matter was correlated with silver speciation and its antibacterial performance. Silver was found to be only active in form of free silver ions (FSI). The presence of chloride ions produced an equilibrium of stable silver chloride complexes which were void of antimicrobial efficacy. However, even at relatively high concentrations of chlorides, a small fraction of FSI may still be present, producing a bactericidal effect with …