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46 results on '"Pasqualetti, Marcella"'

9. Treatment of High-Polyphenol-Content Waters Using Biotechnological Approaches: The Latest Update.

Author

Muñoz-Palazon, Barbara, Gorrasi, Susanna, Rosa-Masegosa, Aurora, Pasqualetti, Marcella, Braconcini, Martina, and Fenice, Massimiliano

Subjects
WATER purification, WATER use, GROUNDWATER pollution, MICROBIAL diversity, MICROBIAL metabolism, PLANT polyphenols
Abstract

Polyphenols and their intermediate metabolites are natural compounds that are spread worldwide. Polyphenols are antioxidant agents beneficial for human health, but exposure to some of these compounds can be harmful to humans and the environment. A number of industries produce and discharge polyphenols in water effluents. These emissions pose serious environmental issues, causing the pollution of surface or groundwater (which are used to provide drinking water) or harming wildlife in the receiving ecosystems. The treatment of high-polyphenol-content waters is mandatory for many industries. Nowadays, biotechnological approaches are gaining relevance for their low footprint, high efficiency, low cost, and versatility in pollutant removal. Biotreatments exploit the diversity of microbial metabolisms in relation to the different characteristics of the polluted water, modifying the design and the operational conditions of the technologies. Microbial metabolic features have been used for full or partial polyphenol degradation since several decades ago. Nowadays, the comprehensive use of biotreatments combined with physical-chemical treatments has enhanced the removal rates to provide safe and high-quality effluents. In this review, the evolution of the biotechnological processes for treating high-polyphenol-content water is described. A particular emphasis is given to providing a general concept, indicating which bioprocess might be adopted considering the water composition and the economic/environmental requirements. The use of effective technologies for environmental phenol removal could help in reducing/avoiding the detrimental effects of these chemicals. In addition, some of them could be employed for the recovery of beneficial ones. [ABSTRACT FROM AUTHOR]

Published
2023
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18. Metagenetic profiling of the bacterial communities of an intertidal pool in Kandalaksha Bay (White Sea, Russia)

Author

Gorrasi Susanna, Pesciaroli Chiara, Barghini Paolo, Pasqualetti Marcella, Giovannini Valeria, and Fenice Massimiliano

Subjects
Kandalaksha Bay, intertidal zone, biodiversity, bacterial communities, 454 pyrosequencing
Abstract

GORRASI, S., PESCIAROLI, C., BARGHINI, P., PASQUALETTI, M., GIOVANNINI, V., ANDFENICE, M.2019.Metagenetic profiling of the bacterial communities of an intertidal pool in Kandalaksha Bay (White Sea, Russia).J environ prot ecol. 20(3). 1317-1324. PDF:https://docs.google.com/a/jepe-journal.info/viewer?a=v&pid=sites&srcid=amVwZS1qb3VybmFsLmluZm98amVwZS1qb3VybmFsfGd4OjIxNmIxN2VjOTU0OWFlNzQ

Published
2019
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19. Structure and diversity of the bacterial community of an Arctic estuarine system (Kandalaksha Bay) subject to intense tidal currents

Author

Gorrasi Susanna, Pesciaroli Chiara, Barghini Paolo, Pasqualetti Marcella, and Fenice Massimiliano

Subjects
Kandalaksha Bay, 454 pyrosequencing, Biodiversity, Arctic estuarine system, Bacterial communities
Abstract

Gorrasi Susanna, Pesciaroli Chiara, Barghini Paolo, Pasqualetti Marcella, Fenice Massimiliano (2019):Structure and diversity of the bacterial community of an Arctic estuarine system (Kandalaksha Bay) subject to intense tidal currents. JOURNAL OF MARINE SYSTEMS,196: 77-85, ISSN: 0924-7963, doi:https://doi.org/10.1016/j.jmarsys.2019.04.004

Published
2019

39. Succession of microfungal communities on <e1>Myrtus communis</e1> leaf litter in a Sardinian Mediterranean maquis ecosystem

Author

PASQUALETTI, MARCELLA, MULAS, BONARIA, ZUCCONI, LAURA, and RAMBELLI, ANGELO

Abstract

The succession of microfungal communities on Myrtus communis leaf litter was monitored from Jan. 1993 to Nov. 1994 using the litter bag method. Three main groups of fungal colonizers were identified, whose presence is correlated with the successive decomposition stages of the substrate and with seasonal variations.

Published
1999

41. Variabilita intraspecifica in Beltrania rhombica Penzig

Author

Rambelli, Angelo and Pasqualetti, Marcella

Abstract

Intraspeciphic variability in Beltrania rhombica Penzig. - Some dimentional and morphological characters of two different strains of Beltrania rhombica Penzig, isolated from dead leaves of Pistacia lentiscus L. in Sardinia and from tropical forest litter in Ivory Coast, are compared to Penzig's and Ellis descriptions. The strains examined are considered ecotypes presumably characteristic of different environments.

Published
1990
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42. Primo contributo alla micoecologia della lettiera di lentisco in alcune isole minori della Sardegna meridionale

Author

Mulas, Bonaria, Pasqualetti, Marcella, and Rambelli, Angelo

Abstract

Preliminary account of the microfungi colonizing Pistaca lentiscus L. litter - A preliminary account of the microfungi colonizing Pistacia lentiscus L. leaf litter in five small islands of South Sardinia is carried out. Two species, Beltrania rhombica Penzig and Endophragmiella boewei (Crane) Hughes are present in almost all the samples investigated. A very low index in richness of species seems to be characteristic of this particular area.

Published
1990
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43. Study of bacterial diversity of a saltern crystallisation pond ('Saline di Tarquinia', Italy) and its correlation with salinity variations

Author

Barghini Paolo, Pasqualetti Marcella, Gorrasi Susanna, and Fenice Massimiliano

Subjects
crystallisation pool, marine saltern, total bacterial community, Saline di Tarquinia
Abstract

BARGHINI P., PASQUALETTI M., GORRASI S., ANDFENICEM.2018.Study of bacterial diversity of a saltern crystallization pond (“Saline di Tarquinia", Italy) and its correlation with salinity variations. J environ prot ecol.19(1): 139–145. PDF online: https://docs.google.com/a/jepe-journal.info/viewer?a=v&pid=sites&srcid=amVwZS1qb3VybmFsLmluZm98amVwZS1qb3VybmFsfGd4OjIyNTM3Mzg1MWQ0YmJmM2Y &nbsp

44. High lutein production by a halo-tolerant strain of Dunaliella sp. (chlorophyceae) isolated from solar salterns in central Italy

Author

Barghini Paolo, Giovannini Valeria, Fenice Massimiliano, Gorrasi Susanna, and Pasqualetti Marcella

Subjects
lutein, photobioreactor, biomass production, Dunaliella
Abstract

BARGHINI P., GIOVANNINI V.,FENICEM., GORRASI S., AND PASQUALETTI M.2018.High lutein production by a halo-tolerant strain ofDunaliellasp. (Chlorophyceae) isolated from solar salterns in Central Italy. J environ prot ecol.19(2): 704–712 PDF online:https://docs.google.com/a/jepe-journal.info/viewer?a=v&pid=sites&srcid=amVwZS1qb3VybmFsLmluZm98amVwZS1qb3VybmFsfGd4OjVkYjU0YmFmYmM5NzVkMDA

45. From ethnobotany to experimental research: the therapeutic properties of Sicilian hellebore

Author

Ali S. Faqi, Marcella Pasqualetti, Francesco Maria Raimondo, Vivienne Spadaro, Spadaro, Vivienne, Pasqualetti, Marcella, Faqi, Ali Said, Raimondo, Francesco Maria, and V. SPADARO, M. PASQUALETTI, A. S. FAQI, F. M. RAIMONDO

Subjects
Endophytic fungi, Ranunculaceae, Plant Science, Biology, Hellebore, Plant use of endophytic fungi in defense, Plant science, medicine, Helleborus bocconei subsp. intermediu, Settore BIO/15 - Biologia Farmaceutica, Traditional medicine, Folk veterinary medicine, Settore BIO/02 - Botanica Sistematica, Pneumonia, biology.organism_classification, medicine.disease, Endemic plant, language.human_language, Experimental research, Helleborus bocconei subsp. siculus, ranunculacea, folk veterinary medicine, Chaetomium strumarium strain RR1, endophytic ascomycete, antibiotic property assays, Ethnobotany, language, Sicilian, Pneumonia (non-human)
Abstract

In Sicily, the genus Helleborus (Ranuculaceae) is only represented by H. bocconei subsp. siculus (= H. bocconei subsp. intermedius). In some mountain areas of the Island, the rhizomes of this plant, harvested in a particular month of the year (May) and dried, are used in traditional veterinary practice for treating pneumonia in domestic animals, cattle and horses in particular. The same usage – with rhizomes of other Helleborus species or subspecies – is reported from various other areas of Mediterranean Europe. Phytochemical tests have permitted the isolation and characterization of new biologically active molecules. The extracts of rhizomes and aerial parts of the plant were shown antibacterial properties. Some compounds, isolated from the methanolic extract of the rhizomes, were shown to be cytotoxic. In addition, morpho-anatomical studies have revealed the presence of different endophytic and commensal fungi in all organs of the plant, which could be isolated and cultured. One of the isolates has been identified as the endophytic fungus Botrytis byssoidea, which is also widely present in the soil. Further fungal isolates include Chaetomium strumarium, strain RR1, an endophytic ascomycete the identity of which was confirmed by molecular analyses. When cultured, it developed plentifully; the filtered broth from these cultures was used in antibiotic property assays. The tests were positive; the detailed results are forthcoming. They support our initial hypothesis, that the therapeutic effect the hellebore’s rhizomes extract is due to metabolites produced by an endophytic fungus. It remains to be seen whether the plant itself, devoid of the microfungus, produces the same therapeutically effective metabolites that are present in the extracts of plants from the wild or from outdoor cultivation. The study of the Sicilian hellebore, beyond its biological interest, has potential for its relevance for therapeutic applications both in veterinary and human medicine.

Published
2018

46. Polyextremophilic Chitinolytic Activity by a Marine Strain (IG119) of Clonostachys &nbsp; rosea .

Author

Pasqualetti M, Gorrasi S, Giovannini V, Braconcini M, and Fenice M

Subjects
Biotechnology, Chitin chemistry, Chitinases isolation & purification, Extremophiles isolation & purification, Extremophiles metabolism, Fermentation, Salinity, Chitinases metabolism, Hypocreales enzymology, Hypocreales metabolism
Abstract

The investigation for novel unique extremozymes is a valuable business for which the marine environment has been overlooked. The marine fungus Clonostachys rosea IG119 was tested for growth and chitinolytic enzyme production at different combinations of salinity and pH using response surface methodology. RSM modelling predicted best growth in-between pH 3.0 and 9.0 and at salinity of 0-40‱, and maximum enzyme activity (411.137 IU/L) at pH 6.4 and salinity 0‱; however, quite high production (>390 IU/L) was still predicted at pH 4.5-8.5. The highest growth and activity were obtained, respectively, at pH 4.0 and 8.0, in absence of salt. The crude enzyme was tested at different salinities (0-120‱) and pHs (2.0-13.0). The best activity was achieved at pH 4.0, but it was still high (in-between 3.0 and 12.0) at pH 2.0 and 13.0. Salinity did not affect the activity in all tested conditions. Overall, C. rosea IG119 was able to grow and produce chitinolytic enzymes under polyextremophilic conditions, and its crude enzyme solution showed more evident polyextremophilic features. The promising chitinolytic activity of IG119 and the peculiar characteristics of its chitinolytic enzymes could be suitable for several biotechnological applications (i.e., degradation of salty chitin-rich materials and biocontrol of spoiling organisms, possibly solving some relevant environmental issues).

Published
2022
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