Search results for " microbiologia"
showing 10 items of 907 documents
Novel marine invertebrate-derived antimicrobial peptides against staphylococcal biofilm
2009
The seed endophytic microbiota of Citrus limon L. Burm. F
2017
Background Plant seeds possess a complex microbiota which may play a crucial rolein a plethora of mechanisms, such as preservation, germination, seedling development, plant growth and health. In particular, seed endophytic microbiota is gaining more and more consideration due to the fact that it may be vertically transmitted to ensure individual competitive advantages. The Citrusspecies, including C.limon,areone of the most economically important evergreen fruit crops in the world. Objectives i)Identification and characterization ofmicrobial isolates from Citrus limon L. Burm. F. seed endosphere. ii) Structure of Citrus limon L. Burm. F. seed endosphytic microbiota. Methods -Surface-sterili…
Response of Soil Microbial Communities to Iron-Porphyrin Catalytic Amendments.
2010
Intensive agricultural practices strongly increase CO2 emission from soil. Synthetic metal-porphyrins were shown to significantly decreased CO2 emission from soil due to an in-situ catalysis of oxidative polymerization of soil organic matter. This research aimed to assess the effects of iron-porphyrin (POR) amendments on soil microbial communities in three arable soils under wheat and maize cropping located in Naples, Turin and Piacenza, characterized by different pedological and climatic conditions. Bulk-soil and rhizo-soil were sampled during 4 years and the microbial groups directly involved in organic matter (OM) mineralization and in key processes of the nitrogen cycle were examined. M…
Tolerance, Adaptation, and Cell Response Elicited by Micromonospora sp. Facing Tellurite Toxicity: A Biological and Physical-Chemical Characterization
2022
The intense use of tellurium (Te) in industrial applications, along with the improper disposal of Te-derivatives, is causing their accumulation in the environment, where oxyanion tellurite (TeO32−) is the most soluble, bioavailable, and toxic Te-species. On the other hand, tellurium is a rare metalloid element whose natural supply will end shortly with possible economic and technological effects. Thus, Te-containing waste represents the source from which Te should be recycled and recovered. Among the explored strategies, the microbial TeO32− biotransformation into less toxic Te-species is the most appropriate concerning the circular economy. Actinomycetes are ideal candidates in…
Giant cell arteritis associated with chronic active Epstein-Barr virus infection
2013
Giant cell arteritis is an inflammatory vasculopathy that preferentially affects medium-sized and large arteries. A viral cause has been suspected but not confirmed in polymyalgia rheumatica and giant-cell arteritis. We report the case of a 81-year-old female who suffered from chronic active Epstein-Barr virus infection and developed giant cell temporal arteritis.
Isolation and characterization of Gordonia SoCg n-alkane degradation cluster
2008
Gordonia strain SoCg is a Gram-positive GC rich n-alkane degrader, isolated from a long-term contaminated beach in Sicily for her ability to degrade long (dodecane C12) and very long chain n-alkanes up to hexatriacontane (C36) (P.Quatrini et al., J. Appl. Microbiol., 2007). PCR analysis, using degenerated primers, reveled that it carries one alkane-hydroxylase gene (alkB); PFGE and Southern analysis showed that this gene is localized on the chromosome. In order to isolate the alk cluster of Gordonia strain SoCg, an enriched gene bank was constructed in E.coli DH10B by isolating restriction fragments of the desired size from a preparative gel. One clone, containing a DNA insert of about 7 kb…
Gene cloning and characterization of an alkane hydroxylase system in the long chain n-alkane- degrader Gordonia sp. SoCg
2008
Development of an ad hoc natural whey starter culture for the production of Vastedda della valle del Belìce cheese
2013
This work was aimed to characterize the autochthonous lactic acid bacteria (LAB) of PDO Vastedda della valle del Belìce cheeses, produced in several dairy factories, for the development of an ad hoc starter culture preparation for the production of this cheese. To this purpose, winter and spring productions were analysed, in order to isolate LAB adapted to perform the fermentation at low temperatures. Plate counts showed the total microbial counts (TMC) till levels of 9 -1almost 10 CFU g and all cheese samples were dominated by coccus LAB. Not all samples were positive for the presence of enterobacteria, but when they were found their concentrations were at similar levels in both seasons. A…
EVALUATING THE RISK OF HEPATITIS B REACTIVATION IN PATIENTS WITH HAEMATOLOGICAL MALIGNANCIES: IS THE SERUM HEPATITIS B PROFILE RELIABLE?
2009
Background/Aim: Patients with an occult hepatitis B virus (HBV) infection undergoing deep immunosuppression are potentially at risk of HBV reactivation. In order to assess whether a polymerase chain reaction (PCR) assay for HBV DNA in serum could be used to predict the reactivation of an occult HBV infection, we performed a retrospective study in a cohort of Sicilian patients with oncohaematological diseases. Methods: We studied by a highly sensitive ad hoc nested PCR for serum HBV DNA 75 HBsAg-negative oncohaematological patients requiring chemotherapy. Results: Thirty-three patients (44%) were HBV seronegative (anti-HBc and anti-HBs negative) and 42 patients (56%) were HBV seropositive (a…