Roberto Ambrosoli

Roberto Ambrosoli
Università degli Studi di Torino | UNITO · Department of Agricultural, Forest and Food Sciences

About

35
Publications
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942
Citations
Citations since 2016
0 Research Items
351 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050

Publications

Publications (35)
Article
Full-text available
Terpenoids are plant metabolites which can be found in traces in the milk of animals fed with fresh forages. To these compounds, many biological properties, including antimicrobial activity, have been recognized. However, no information about the sensitivity of lactic acid bacteria (naturally occurring in milk and dairy products) to terpenoids are...
Article
The aim of this work was to evaluate the influence exerted by two different commercial organoclays (DELLITE 43B and DELLITE 67G) on a model microbial consortium using microbial metabolic characterization with BIOLOG system and denaturing gradient gel electrophoresis (DGGE) molecular approach. The information obtained from the molecular analyses, in...
Article
A research was undertaken to explore the possibility to express with suitable mathematical models Biolog metabolic curves obtained for oenological yeasts and to use such models for monitoring yeast growth in alcoholic fermentation. Experimental curves of metabolic activity in Biolog YT microplates, obtained in a previous work for various oenologica...
Article
The antimicrobial properties of six volatile organic compounds (VOCs) of essential oils were tested on foodborne microflora of fresh-cut salad by plate-count method and by Biolog methodology, with lettuce-juice as nutritive medium. VOCs examined were eugenol, limonene, cinnamaldehyde, thymol, menthol and γ-terpinene, added in 2 concentrations in th...
Article
A total of about 1000 autochthonous strains were isolated from fresh and fermented artisanal products (cheese and meat) of the Piedmont area (Northwest of Italy) and screened for their antimicrobial activity. Among them, 98 bacteriocin-producing strains were detected and identified by molecular methods and genetic determinants encoding the antimicr...
Article
A research was undertaken to explore the possibility to use Biolog system of microbial metabolic characterization for the monitoring of yeast population evolution during alcoholic fermentation for wine production. An application of Biolog system was employed for the characterization of yeasts of oenological interest, in pure cultures and mixed cons...
Article
Changes in the quality of minimally processed red chicory (Cichorium intybus L.) were studied during storage in a polyvinyl chloride (PVC) film and in a mono-oriented polypropylene (OPP) film at 4 °C. The maximum limit of 5 × 107 CFU g−1 for mesophilic aerobic bacterial count was attained after 4 days using the PVC film and after 4.5 days using the...
Article
Chemical, microbiological and nutritional characteristics of organic Fontina, an Italian Protected Designation of Origin (PDO) raw cow's milk cheese, and of bulk milk used for its production, were studied. Organic winter-indoor and summer-pasture productions were compared; organic summer samples were compared to conventional summer ones. The organi...
Article
To study the evolution of rind microbial communities in Fontina PDO cheese. Four batches were examined for their surface microflora during ripening, carried out in two different maturing caves, at Ollomont and Pré-Saint-Didier, Aosta Valley region, Northwest of Italy. Culture-dependent methodologies were combined with culture-independent analysis (...
Article
To study the relationship between the nature of the substratum and the diversity and stability of the ammonia-oxidizing microbial community in a constructed wetland for the treatment of wastewaters. Samples have been taken the year around from sections of the wetland filled with different substrata. When present, the root zones of the helophyte Phr...
Conference Paper
Full-text available
In food thermal processing, correct time-temperature profiles should be chosen to achieve the necessary safety maintaining, at the same time, the best sensory and nutritional properties. A proper thermal treatment is crucial to obtain a high quality Italian cooked ham. After cooking, hams are cleaned and packaged in a thermo-retractable bag. This p...
Article
Shelf-life of ready-to-use carrots is critically dependent upon storage temperature. A kinetic study was carried out on total mesophilic aerobic bacterial growth, total coliform growth and “whiteness index” (WI) increase of packed Julienne-type carrot sticks at different times and temperatures of storage in air and darkness. Kinetic equations were...
Article
Full-text available
Monitoring the environmental impact of anthropogenic disturbance on soil ecosystem is of great importance for optimizing strategies for soil use, conservation and remediation. The aim of this study was to assess whether and to what extent a long-term, human-induced disturbance could have affected main chemical and biological properties in an agricu...
Article
The quality of minimally-processed carrots was studied during storage at 4 and 10 °C by evaluating: (a) the physicochemical indices, namely: chlorogenic acid, carotenoids, sugars, and whiteness index (WI); (b) the microbial indices, namely: total bacterial count (TBC), coliforms, lactic acid bacteria, yeasts; (c) the sensory attributes, namely: fru...
Article
Full-text available
Polycyclic aromatic hydrocarbons (PAHs) are one of the main classes of contaminants in the terrestrial environment. Concentrations of biphenyl, fluorene, phenanthrene and pyrene were added to soil samples in order to investigate the anaerobic degradation potential of PAHs under denitrifying conditions. A mixed population of microorganisms obtained...
Article
The effects of soil management on some microbiological properties and soil bacterial community structure were evaluated. Two field sites with the same soil type, located on the same geographic area adjacent to one other, have received different soil management practices and cultivation. One site has been subjected for 20 years to intensive horticul...
Article
Full-text available
In the North-West Italy, close spaced and low trunk vines are vertically trellised and Guyot pruned. In these conditions the permanent grass cover may compete with grapevine leaves and clusters for air and light, and with grapevine roots for water and nitrogen. In a «White Muscat» vineyard, grafted onto «420A», the following soil management techniq...
Article
Biolog methodology was used for the preliminary screening of different cultural conditions in order to detect the best combination/s of factors influencing the metabolic performance of bacterial consortia active in the degradation of hydrocarbons. Two microbial consortia were tested for their activity on 2 hydrocarbons (nonadecane and eicosane) in...
Article
Active microbial degraders of the herbicide prosulfocarb (PSC) were isolated to evaluate their performance in soil with a view to their use for bioremediation. The isolated cultures (a microbial consortium and a Pseudomonas sp. strain) were active when tested in mineral medium with PSC as the only carbon source, but had an adverse effect on the soi...
Article
Full-text available
Before planning the large-scale use of nonpathogenic strains of Fusarium oxysporum as biocontrol agents of Fusarium wilt, their behaviour and potential impact on soil ecosystems should be carefully studied as part of risk assessment. The aim of this work was to evaluate the effects of antagonistic F. oxysporum strains, genetically manipulated (T26/...
Article
Considerable half-life differences (8.7 to 23.6 days) were observed when persistence of prosulfocarb (PSC) was tested in three Italian soils. Subsequent assessment of biodegradation in the dissipation of PSC showed that it was strongly adsorbed on the microbial cells but no differences in the microbial activity of the three soils were detected. Che...
Article
The occurrence of carbofuran accelerated biodegradation has been ascertained in two Italian soils utilized for sugarbeet cultivation and treated with the pesticide every other year for 5 years. Control soils with similar agrochemical characteristics but no carbofuran treatment history were also chosen. The results obtained showed that in the treate...
Article
We isolated and identified four spore-forming bacteria from activated sludges and soil, three of which were able to degrade acifluorfen. Biochemical characteristics, DNA base composition and DNA-DNA homology indicated that the degrading strains belonged to the species Bacillus thuringiensis, Clostridium perfringens and Clostridium sphenoides. The f...
Article
Fenoxaprop-ethyl was found to be metabolized by a mixed microbial population isolated from a leachate from a landfill. Fenoxaprop acid and 6-chloro-2(3H)-benzoxazolone were detected as metabolic products in the culture broths. It was shown that the microbial population could utilize fenoxapropethyl as a source of carbon and nitrogen, but the presen...
Article
Laboratory experiments were conducted to study the degradation of acifluorfen 5-[2-chloro-4-(trifluoromethyl)-phenoxyl]-2-nitrobenzoic acid by a mixed microbial population. Concentrations of acifluorfen up to 100 mg/l had no inhibitory effect on the growth of microbial culture. The microorganisms degraded acifluorfen through a cometabolic process i...
Article
A laboratory study on the biodegradation of acifluorfen in anaerobic conditions was conducted. Mixed and pure cultures isolated from activated sludges of a waste water treatment plant and from a soil with a long history of acifluorfen applications could reduce acifluorfen to aminoacifluorfen in a medium with the herbicide as sole source of carbon....
Article
A microbial mixed culture able to grow on fluazifop-butyl and fluazifop was isolated. Fluazifop degradation by this microbial population was studied either when the herbicide was applied as the sole carbon source or in the presence of a second carbon source (sodium acetate or sodium propionate). The degradation rate was enhanced by sodium propionat...
Article
Samples of goat milk with low and high alpha S1-casein content collected from animals of Alpine and Saanen breeds in the same stage of lactation were compared for coagulation properties (coagulation time, rate of curd formation, curd firmness) and chemical composition (total solids, ash, total protein, total casein, whey protein, fat, Ca, P, pH). M...
Article
Full-text available
The effects of ethylene oxide (EtO) on survival of soil microflora and on selected chemical properties of a sandy-loam soil were examined. Soil sterilization was achieved after 8 hours exposure to EtO. Ethylene oxide treatment increased soil pH and organic matter content. Extractable Mn and Fe slightly increased whereas P content decreased. Total...
Article
Samples with different dry matter contents of Lolium italicum A. Br., Medicago sativa L., have been ensiled in hermetically sealed containers, in order to study the evolution of microflora and its activity. The principal microbial groups (coliforms, proteolytics , lactic acid bacteria, clostridia, yeasts) have been detected and enumerated, in anaer...
Article
Fresh and wilted samples of Lolium italicum A. Br., Dactylis glomerata L., Medicago sativa L., have been ensiled in laboratory microsilos for the study of microflora evolution. The principal microbial groups (coliforms, proteolytic bacteria, clostridia, lactic acid bacteria, yeasts) have been detected and enumerated, in anaerobic atmosphere, after...
Article
In two solid urban wastes piles, one treated with 7.5% of good bovine manure, the other used as a test, the evolution of the microflora has been studied, during the first period of biodegradation and at the end of the maturation process, in order to control if bioactivation can positively affect the biodegradation development. Actinomytcetes and fu...

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