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Dive into the research topics where Valentina Roscini is active.

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Featured researches published by Valentina Roscini.


Journal of Dairy Science | 2015

Milk fatty acid composition, rumen microbial population, and animal performances in response to diets rich in linoleic acid supplemented with chestnut or quebracho tannins in dairy ewes

Arianna Buccioni; Mariano Pauselli; Carlo Viti; Sara Minieri; Grazia Pallara; Valentina Roscini; Stefano Rapaccini; M. Trabalza Marinucci; Paola Lupi; Giuseppe Conte; Marcello Mele

The aim of the study was to evaluate milk fatty acid (FA) profile, animal performance, and rumen microbial population in response to diets containing soybean oil supplemented or not with chestnut and quebracho tannins in dairy ewes. Eighteen Comisana ewes at 122±6 d in milking were allotted into 3 experimental groups. Diets were characterized by chopped grass hay administered ad libitum and by 800 g/head and day of 3 experimental concentrates containing 84.5 g of soybean oil/kg of dry matter (DM) and 52.8 g/kg of DM of bentonite (control diet), chestnut tannin extract (CHT diet), or quebracho tannin extract (QUE diet). The trial lasted 4 wk. Milk yield was recorded daily, and milk composition and blood parameters were analyzed weekly. At the end of the experiment, samples of rumen fluid were collected to analyze pH, volatile fatty acid profile, and the relative proportions of Butyrivibrio fibrisolvens and Butyrivibrio proteoclasticus in the rumen microbial population. Hepatic functionality, milk yield, and gross composition were not affected by tannin extracts, whereas milk FA composition was characterized by significant changes in the concentration of linoleic acid (CHT +2.77% and QUE +9.23%), vaccenic acid (CHT +7.07% and QUE +13.88%), rumenic acid (CHT -1.88% and QUE +24.24%), stearic acid (CHT + 8.71% and QUE -11.45%), and saturated fatty acids (CHT -0.47% and QUE -3.38%). These differences were probably due to the ability of condensed versus hydrolyzable tannins to interfere with rumen microbial metabolism, as indirectly confirmed by changes in the relative proportions of B. fibrisolvens and B. proteoclasticus populations and by changes in the molar proportions of volatile fatty acids. The effect of the CHT diet on the milk FA profile and microbial species considered in this trial was intermediate between that of QUE and the control diet, suggesting a differential effect of condensed and hydrolyzable tannins on rumen microbes. Compared with control animals, the presence of B. fibrisolvens increased about 3 times in ewes fed CHT and about 5 times in animals fed QUE. In contrast, the abundance of B. proteoclasticus decreased about 5- and 15-fold in rumen liquor of ewes fed CHT and QUE diets, respectively. The use of soybean oil and a practical dose of QUE or CHT extract in the diet of dairy ewes can be an efficient strategy to improve the nutritional quality of milk.


Meat Science | 2015

Effect of turmeric powder (Curcuma longa L.) and ascorbic acid on physical characteristics and oxidative status of fresh and stored rabbit burgers

Simone Mancini; Giovanna Preziuso; Alessandro Dal Bosco; Valentina Roscini; Zsolt Szendrő; Filippo Fratini; Gisella Paci

The objective of this study was to evaluate the effect of Curcuma longa powder and ascorbic acid on some quality traits of rabbit burgers. The burgers (burgers control with no additives; burgers with 3.5 g of turmeric powder/100g meat; burgers with 0.1g of ascorbic acid/100g meat) were analyzed at Days 0 and 7 for pH, color, drip loss, cooking loss, fatty acid profile, TBARS, antioxidant capacity (ABTS, DPPH and FRAP) and microbial growth. The addition of turmeric powder modified the meat color, produced an antioxidant capacity similar to ascorbic acid and determined a lower cooking loss than other formulations. Turmeric powder might be considered as a useful natural antioxidant, increasing the quality and extending the shelf life of rabbit burgers.


Meat Science | 2014

Effect of dietary alfalfa on the fatty acid composition and indexes of lipid metabolism of rabbit meat

A. Dal Bosco; Cecilia Mugnai; Valentina Roscini; Simona Mattioli; S. Ruggeri; C. Castellini

The objective of the study was to analyse and increase the quality of rabbit meat by increasing the levels of natural bioactive compounds through providing fresh alfalfa to rabbits as complementary feed. At 50 days of age, forty rabbits were divided into two homogeneous groups and fed pelleted feed (control group) or pelleted feed plus fresh alfalfa (alfalfa group). The lipid content of meat was significantly higher in the control group likely due to the higher feed consumption observed in this group. The same trend was observed in the contents of myristic, palmitoleic, oleic and linoleic acid. On the contrary, the supplementation of fresh alfalfa increased the stearic, linolenic, eicosatrienoic, eicosapentaenoic, docosapentaenoic, docosahexaenoic and total polyunsaturated fatty acid contents; also the total monounsaturated fatty acids and the α- and γ-tocopherol content was significantly lower. Moreover, alfalfa ingestion decreased the n-6 content, n-6/n-3 ratio and thrombogenicity index.


Meat Science | 2017

Improving pork burgers quality using Zingiber officinale Roscoe powder (ginger)

Simone Mancini; Gisella Paci; Filippo Fratini; Beatrice Torracca; Roberta Nuvoloni; Alessandro Dal Bosco; Valentina Roscini; Giovanna Preziuso

Pork burgers were evaluated for physical-chemical characteristics, fatty acids profile, lipid oxidation, antioxidant capacity, microbiological growth and sensory evaluation during storage time of seven days at 4°C as function of three formulations as only meat (control, B) and meat added with ginger powder at the percentage of 1 and 2% (BG1 and BG2). BG1 and BG2 were less redness than control ones with incremented yellow hue. These modifications in color parameters did not modify sensory characteristics of burgers. PUFA were incremented (both PUFAω3 and PUFAω6) by the addition of ginger. Furthermore, BG1 and BG2 burgers showed to be less sensitive to lipid oxidation and to possess an increase in antioxidant capacity. Microbial growth evaluation of total aerobic count and Pseudomonas spp. showed that ginger powder delayed in time the bacterial contamination. Results highlighted that the presence of ginger led to an enhanced shelf life and health characteristics of burgers (increasing peroxidisability, ratio hypocholesterolemic/hypercholesterolemic and ratio ω3/ω6; reducing atherogenicity and thrombogenicity).


Italian Journal of Animal Science | 2017

Effect of age and feeding area on meat quality of wild boars

M. Pedrazzoli; Alessandro Dal Bosco; C. Castellini; David Ranucci; Simona Mattioli; Mariano Pauselli; Valentina Roscini

Abstract The stomach content and samples of Longissimus dorsi muscle of 32 feral wild boars were collected in two different feeding areas (forest and farmland) of Umbria region (Italy). The animals from each feeding area were divided into two age classes: class 1 (12–24 months of age; 48 kg average weight) and class 2 (animals older than 2 years of age; 84 kg average weight). The major food categories consumed were hard mast and crops (89.02–75.98%). The L*(lightness) and a*(red to green colour) values of the meat were affected by the feeding area as well as the b*(yellow colour) value; the age significantly affected only the a* and the b* value of the meat. The α-tocopherol was the most abundant vitamin E homologue, ranged between 520.63 and 1881.33 ng/g and was higher in farmland areas. The index of lipid oxidation (TBARS) ranged from 0.093 and 0.140 mg MDA/kg and was higher in wild boars from farmland. The monounsaturated fatty acids (MUFA) ranged between 38.36 and 46.75% and were higher in wild boar of class 2. The total polyunsaturated fatty acids (PUFA) as well as PUFAn-6 were affected by age, while PUFAn-3 was only affected by feeding area and ranged from 0.91 and 1.99 in farmland and forest, respectively. The feeding area affects the intramuscular fat contents in terms of nutritional characteristics of the meat: the n-6/n-3 ratio that was lower in meat from animals hunted in the forest area (p ≤ .001), as well as the ARA/(EPA + DHA) ratio (p ≤ .01).


Journal of Dairy Science | 2018

Effect of increasing amounts of olive crude phenolic concentrate in the diet of dairy ewes on rumen liquor and milk fatty acid composition

Alice Cappucci; Susana P. Alves; Rui J.B. Bessa; Arianna Buccioni; Federica Mannelli; Mariano Pauselli; Carlo Viti; Roberta Pastorelli; Valentina Roscini; Andrea Serra; Giuseppe Conte; Marcello Mele

Agro-industrial by-products contain several secondary plant metabolites, such as polyphenols, tannins, saponins, and essential oils. The effects of these compounds on animal metabolism may vary significantly according to the dose, the chemical nature of the molecules, and the overall composition of the diet. In the Mediterranean area, the olive oil extraction is associated with 2 by-products: olive pomace and wastewater, both rich in polyphenols. In particular, wastewater may be further processed to obtain olive crude phenolic concentrate (OCPC). An experiment was carried out aiming to evaluate animal performance, milk fatty acid (FA) profile, diversity of rumen microbial population, and rumen liquor FA profile in dairy ewes fed diets containing extruded linseed (EL) and increasing doses of OCPC. Twenty-eight Comisana ewes in mid lactation were allotted to 4 experimental groups. The experiment lasted 5 wk after 3 wk of adaptation. Diets were characterized by lucerne hay administrated ad libitum and by 800 g/ewe and day of 4 experimental concentrates containing 22% of EL on dry matter and increasing dose of OCPC: 0 (L0), 0.6 (L0.6), 0.8 (L0.8), and 1.2 (L1.2) g of OCPC/kg of dry matter. Milk yield was daily recorded and milk composition was analyzed weekly. At the beginning and at the end of the experiment, samples of rumen liquor were collected to analyze FA profile, changes in rumen microbial population, and dimethylacetal (DMA) composition. The inclusion of OCPC did not affect milk yield and gross composition, whereas milk from L0.8 and L1.2 sheep contained higher concentrations of linoleic (+18%) and α-linolenic acid (+24%) and lower concentration of the rumen biohydrogenation intermediates. A similar pattern was observed for rumen liquor FA composition. No differences were found in the diversity of the rumen microbial population. Total amount of DMA did not differ among treatments, whereas significant differences were found in the concentration of individual DMA; in the diet with a higher amount of OCPC, DMA 13:0, 14:0, 15:0, and 18:0 increased, whereas DMA 16:0 decreased. Probably the presence of polyphenols in the diet induced a rearrangement of bacteria membrane phospholipids as a response to the rumen environment stimulus. Overall, the use of OCPC allowed a significant increase in the polyunsaturated FA content of milk, probably due to a perturbation of the rumen biohydrogenation process. Further studies are needed to understand the correlation between diet composition and the pattern of DMA in rumen liquor.


BioMed Research International | 2017

Effect of Dietary Chestnut or quebracho tannin supplementation on microbial community and fatty acid profile in the rumen of dairy ewes.

Arianna Buccioni; Grazia Pallara; Roberta Pastorelli; Letizia Bellini; Alice Cappucci; Federica Mannelli; Sara Minieri; Valentina Roscini; Stefano Rapaccini; Marcello Mele; Luciana Giovannetti; Carlo Viti; Mariano Pauselli

Ruminants derived products have a prominent role in diets and economy worldwide; therefore, the capability to control the rumen microbial ecosystem, for ameliorating their quality, is of fundamental importance in the livestock sector. The aim of this study was to evaluate the effect of dietary supplementation with chestnut and quebracho tannins on microbial community and fatty acid profile, in the rumen fluid of dairy ewes. Multivariate analysis of PCR-DGGE profiles of rumen microbial communities showed a correlation among the presence of chestnut or quebracho in the diet, the specific Butyrivibrio group DGGE profiles, the increase in 18:3 cis9, cis12, and cis15; 18:2 cis9 and cis12; 18:2 cis9 and trans11; 18:2 trans11 and cis15; and 18:1 trans11 content, and the decrease in 18:0 concentration. Phylogenetic analysis of DGGE band sequences revealed the presence of bacteria representatives related to the genera Hungatella, Ruminococcus, and Eubacterium and unclassified Lachnospiraceae family members, suggesting that these taxa could be affected by tannins presence in the diets. The results of this study showed that tannins from chestnut and quebracho can reduce the biohydrogenation of unsaturated fatty acids through changes in rumen microbial communities.


Journal of applied botany and food quality | 2015

Bioactive compounds and antioxidant characterization of three edible wild plants traditionally consumed in the Umbria Region (Central Italy): Bunias erucago L. (corn rocket), Lactuca perennis L. (mountain lettuce) and Papaver rhoeas L. (poppy)

Angela Maurizi; Alfredo De Michele; Aldo Ranfa; Anna Ricci; Valentina Roscini; Roberto Coli; M. Bodesmo; Giovanni Burini

The leaves of three edible wild plants, Bunias erucago L. (Corn rocket), Lactuca perennis L. (Mountain lettuce) and Papaver rhoaes L. (Poppy) were analysed for their proximate composition, some nutraceutical components and total antioxidant capacity. The protein levels ranged from 2.7 to 4.1 g/100 g of the edible portion. The range of dietary fibre content was 3.8 to 6.4 g/100 g of the edible portion. The amount of ash, carbohydrate and lipid ranged from 1.7 to 1.9, 3.3 to 4.4 and 0.22to 0.45 g/100 g of the edible portion, respectively. Lipids consisted mainly of polyunsaturated fatty acids with the highest value for the Bunias erucago L. (71.8 % of total fatty acids) and Lactuca perennis L. (70.0 %). Potassium (374.0-521.0 mg/100 g) and calcium (204.8-331.8 mg/100 g) were the most representative macro-elements in the species studied. The values of vitamin E, b-carotene and total vitamin C are included in the range from 0.91 to 2.61 mg/100 g, from 1,957 to 2,631 mg/100 g and from 19.2 to 31.0 mg/100 g, respectively. Our results showed that the total antioxidant capacity performed by the Oxygen Radical Absorbance Capacity (ORAC) method, which ranges from 27.2 to 63.7 μmol TE/g, is highly justifiable by the high content of phenolic compounds (159-246 mg GAE/100 g).


Italian Journal of Animal Science | 2015

Response of rumen microbial ecosystem to diets integrated with chestnut or quebracho tannins in dairy ewes

Arianna Buccioni; Carlo Viti; Mariano Pauselli; Roberta Pastorelli; Sara Minieri; Grazia Pallara; Valentina Roscini; Luciana Giovannetti; Marcello Mele

15.30-16.00 Elisabetta Canali, Sara Barbieri, Michela Minero, Valentina Ferrante, Silvana Mattiello, Adroaldo Zanella AWIN project: innovation in animal welfare assessment .......................................................................................................................................C-001 16.00-16.15 Susanna Lolli, Inma Estevez, Lorenzo Ferrari, Tatiane Terumi Negrão Watanabe, Sezen Ozkan, Carlo Tremolada, Valentina Ferrante Protocol development for welfare assessment in commercial turkey farms .....................................................................................................C-002 16.15-16.30 Monica Battini, Sara Barbieri, Guido Bruni, Giorgio Zanatta, Silvana Mattiello Testing the feasibility of a prototype welfare assessment protocol in intensive dairy goat farms ..............................................................C-003 16.30-16.45 Katia Parati, Rossana Capoferri, Livia Moscati, Marco Sensi, Guerino Lombardi, Francesca Battioni, Gianpietro Sandri, Carlo Briani, Andrea Galli The effect of the relaying mode on welfare of the pregnant sow .....................................................................................................................................C-004 16.45-17.00 Marta Brscic, Giulia Vida, Annalisa Scollo, Giulio Cozzi, Flaviana Gottardo Relationship between pig welfare in the pre-slaughter phase and superficial bruises of their carcasses. .................................................C-005 17.00-17.15 Maria Lúcia Pereira Lima, João Alberto Negrão, Claudia Cristina Paro de Paz Corral modification for humane livestock handling can improve cattle behavior and reduce serum cortisol..........................................C-006 17.15-17.30 Isabella Lora, Marta Brscic, Luisa Magrin, Clelia Rumor, Flaviana Gottardo Effects of innovative horizontal fans on beef cattle health, growth and welfare .............................................................................................C-007 17.30-17.45 Miriam Iacurto, Roberto Steri, Germana Capitani, Federico Vincenti Animal welfare in beef cattle: performances and meat quality ............................................................................................................................C-008


Small Ruminant Research | 2017

Chestnut or quebracho tannins in the diet of grazing ewes supplemented with soybean oil: Effects on animal performances, blood parameters and fatty acid composition of plasma and milk lipids

Arianna Buccioni; Mariano Pauselli; Sara Minieri; Valentina Roscini; Federica Mannelli; Stefano Rapaccini; Paola Lupi; Giuseppe Conte; Andrea Serra; Alice Cappucci; L. Brufani; F. Ciucci; Marcello Mele

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Carlo Viti

University of Florence

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