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Search Results: 1 - 10 of 167579 matches for " E. Marongiu "
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S. Virgilio,G. Lorenzoni,E. Marongiu,T. Tedde
Italian Journal of Food Safety , 2013, DOI: 10.4081/ijfs.2010.8.71
Abstract: The progressive diffusion of dinoflagellates belonging to Alexandrium genus (A. catenella and A.minutun) and the contamination of the mussels used usually as food with marine toxins represents an high risk for the human health and for business mussels farms. In this study, the authors reported results of analysis during 2008 for detection P.S.P. (Paralytic Shellfish Poison) toxins in mussels bred in Olbia and Oristano areas and health precautions.
Interaction of reproduction rhythm, suckling and parity on mating incidence, ovarian dynamics and estrogen secretion in the rabbit doe
Maria Laura Marongiu
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2009.s2.793
Abstract: The effects of suckling and remating interval (11 or 21 d post partum) were studied in primiparous (P=25) and multiparous (M=23) hybrid rabbits. In P rabbits, suckling had no signifi- cant effect on mating incidence; however, a higher percentage of females accepted the male on d 11 than on d 21 (P<0.01). In M rabbits, no significant differences in mating performance due to either day, suckling or their interaction were found. A higher proportion of nonsuckled than suckled P rab- bits ovulated (P<0.01). Ovulation incidence was not affected significantly by day of mating, suckling or their interaction in M rabbits. A comparison of the day influence in P and M rabbits on mating incidence showed a greater effect in the P (P<0.05) while the suckling effect on ovulation perform- ance showed an insignificant difference in the two parity groups. Ovulation rate, as assessed by ultrasound, was not influenced significantly by day or suckling in either P or M rabbits. The follicle distribution was marked by fewer large follicles and lower plasma estrogen levels were detected in suckled than in nonsuckled P and M rabbits (P<0.05). Further research is needed to elucidate these phenomena also when AI is performed.
Synthesis and Evaluation of in Vitro Biological Activity of 4-Substituted Arylpiperazine Derivatives of 1,7,8,9-Tetrachloro-10,10-dimethoxy-4-azatricyclo[,6]dec-8-ene-3,5-dione
Jerzy Kossakowski,Magdalena Pakosinska-Parys,Marta Struga,Izabela Dybala,Anna E. Koziol,Paolo La Colla,Laura Ester Marongiu,Cristina Ibba,David Collu,Roberta Loddo
Molecules , 2009, DOI: 10.3390/molecules14125189
Abstract: A series of twenty arylpiperazine derivatives of 1,7,8,9-tetrachloro-10,10-dimethoxy-4-azatricyclo[,6]dec-8-ene-3,5-dione have been prepared. These derivatives were tested in vitro with the aim of identifying novel lead compounds active against emergent and re-emergent human and cattle infectious diseases (AIDS, hepatitis B and C, tuberculosis, bovine viral diarrhea). In particular, these compounds were evaluated in vitro against representatives of different virus classes, such as a HIV-1 (Retrovirus), a HBV (Hepadnavirus) and the single-stranded RNA+ viruses Yellow fever virus (YFV) and Bovine viral diarrhea virus (BVDV), both belonging to the Flaviridae. Compounds 2c, 2g and 3d showed a modest activity against CVB-2. The molecular structures of the starting imide 1 and one of propyl-piperazine derivatives, 3b, have been determined by an X-ray crystallography study.
A six-year investigation on reproductive performance of hybrid rabbits. 1. Pregnancy rate and numerical productivity at weaning as affected by season
M. L. Marongiu,C. Dimauro,B. Floris
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2007.1s.770
Abstract: With the aim to clarify the effect of seasonal variation on reproductive performance of hybrid rabbits, a six-years investigation was carried out. Traits analysed were pregnancy rate of does and numerical productivity at weaning. The data set included: 33588 matings and subsequent pregnancy diagnosis; 245743 young rabbits at weaning. From the statistical analysis, pregnancy rate and numerical productivity at weaning appeared to be significantly (P<0.001) affected by seasonal variation. Furthermore a statistically significant (P<0.001) month influence was also found. Nevertheless a correlation between the two parameters needs to be performed to supplement our analysis.
A procedure for rabbit blood serial collection
M. L. Marongiu,A. Gulinati,B. Floris
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2007.1s.773
FTIR nanobiosensors for Escherichia coli detection
Stefania Mura,Gianfranco Greppi,Maria Laura Marongiu,Pier Paolo Roggero
Beilstein Journal of Nanotechnology , 2012, DOI: 10.3762/bjnano.3.55
Abstract: Infections due to enterohaemorrhagic E. coli (Escherichia coli) have a low incidence but can have severe and sometimes fatal health consequences, and thus represent some of the most serious diseases due to the contamination of water and food. New, fast and simple devices that monitor these pathogens are necessary to improve the safety of our food supply chain. In this work we report on mesoporous titania thin-film substrates as sensors to detect E. coli O157:H7. Titania films treated with APTES ((3-aminopropyl)triethoxysilane) and GA (glutaraldehyde) were functionalized with specific antibodies and the absorption properties monitored. The film-based biosensors showed a detection limit for E. coli of 1 × 102 CFU/mL, constituting a simple and selective method for the effective screening of water samples.
IMAGE: A New Tool for the Prediction of Transcription Factor Binding Sites
R. Casilli,A. Marongiu,S. Melchionna,P. Palazzari
Bioinformatics and Biology Insights , 2008,
Abstract: IMAGE is an application tool, based on the vector quantization method, aiding the discovery of nucleotidic sequences corresponding to Transcription Factor binding sites. Starting from the knowledge of regulation regions of a number of co-expressed genes, the software is able to predict the occurrence of specific motifs of different lengths (starting from 6 base pairs) with a defined number of punctual mutations.
Biological Assays and Chemical Composition of Volatile Oils of Bupleurum fruticosum L. (Apiaceae)
Andrea Maxia,Maria A. Frau,Bruno Marongiu,Alessandra Piras
Records of Natural Products , 2011,
Abstract: The composition of supercritical CO 2 extracts and essential oils obtained by hydrodistillation of Bupleurum fruticosum L., growing spontaneously in Italy and Portugal, and its antifungal activity is reported. The collected extracts were analyzed by GC-FID and GC-MS methods. The minimal inhibitory concentration (MIC) and the minimal lethal concentration (MLC) were used to evaluate the antifungal activity of the oils against Candida albicans, C. tropicalis, C. krusei, C. guillermondii, C. parapsilosis, Cryptococcus neoformans, Trichophyton rubrum, T. mentagrophytes, Microsporum canis, M. gypseum, Epidermophyton floccosum, Aspergillus niger, A. fumigatus and A. flavus.
Influence of weaning age (28 vs. 63 d) on quantitative and qualitative carcass traits of rabbits
M.L. Marongiu,F. Bovera,G. Moniello,A. Nizza
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2005.2s.547
Abstract: Nowadays there is an increasing interest towards breeding systems, also for rabbit meat production, that are more mindful of animal welfare through an attenuation of the productive cycles intensity. These particular rearing techniques provide a delaying of the weaning age to reduce young rabbits stress. The present experiment is part of a wider research (Pinna et al., 2004; Marongiu et al., 2004) conducted in a sardinian farm in which rabbits are usually weaned at about 60 days of age. Surely this managerial choice could be considered rather questionable but from a scientific point of view could also represent the occasion to examine the productive performance of rabbits submitted to such a late weaning. The final part of the survey, regarding the carcass composition and the meat chemical-nutritional characteristics, was carried out through the comparison of two groups of rabbits weaned at 28 and at 63 days of age respectively.
Effect of pre-weaning solid feed and milk intake on caecal content characteristics and performance of rabbits around weaning
Antonino Nizza,Giampiero Stanco,Carmelo Di Meo,Maria Laura Marongiu
Italian Journal of Animal Science , 2010, DOI: 10.4081/ijas.2002.95
Abstract: The aim of this study is to know the effect of different solid feed and milk intake during suckling on performance around weaning and on caecal content characteristics at weaning. In order to obtain different intakes of milk and solid feed, 13 litters of pregnant females (PF) inseminated the day after delivery and 14 litters of non-pregnant females (NPF) were compared. At birth the litters were equalized at eight pups and during lactation dead pups were replaced by pups of the same age from nursing does. Compared to the PF group, rabbits in the NPF group had a higher milk intake (26.0 versus 21.4 g/day; P < 0.01) and lower solid feed intake (9.1 versus 11.5 g/day; P < 0.01) between 20 and 28 days of age. No significant difference was observed between the two groups in weight gain before and post-weaning (28-49 days). At weaning, the rabbits in group PF showed higher values in caecal content (g 26.3 versus 22.6; P < 0.05) and volatile fatty acids (mmol/l 52.2 versus 43.6; P < 0.01) and lower values in empty caecal weight (g 7.18 versus 7.78; P < 0.05), C3 (6.4 versus 9.3%; P < 0.01) and C3/C4 ratio (0.39 versus 0.63; P < 0.01) than the group NPF. On the basis of the above results, it may be concluded that the quantity of solid feed and milk intake before weaning influenced the charac- teristics of the caecal content, but not the performance of rabbits around weaning.
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