1,721,041 research outputs found
Effect of two different protein/fat ratios of the diet on meagre (Argyrosomus regius) traits
No full textThe aim of this study was to evaluate the effect of two diets with different protein/fat ratios (P/F) (diet A: P/F 2.26; diet B: P/F 3.36) on the chemical composition, fatty acid profile and some somatic indexes of meagre (Argyrosomus regius). The trial was carried out on two groups of meagre raised in two different sea cages during 15 months. At the end of the production cycle biometric measures as well as chemical-nutritional analysis of the fillets were conducted on 25 fishes per group. Diet A, with a lower P/F, furnished animals with higher percentages of mesenteric fat (0.48 vs 0.41%; P<0.01) and of fillet yield (51.21 vs 48.12; P<0.01). Moreover, the fillets obtained with the diet A showed higher percentage of fat (3.60 vs 2.41%; P< 0.01), lower moisture (74.10 vs 75.42%; P<0.01), lower losses of water under pressure (16.73 vs 20.20%; P<0.01) and after 48 h of refrigeration (3.08 vs 4.23%; P<0.01). The fatty acids profile of fillets was affected by the diet. Diet A resulted in a higher level of saturated fatty acids (26.44 vs 23.17% of total lipid; P<0.01) and a lower percentage of polyunsaturated fatty acids (31.56 vs 36.08%; P<0.01) in the fillet, mainly due to the lower content of linoleic acid (13.63 vs 19.77%; P<0.01). The atherogenic (AI) and thrombogenic (TI) indexes, which resulted very low in the fish of Group B (AI=0.48 vs 0.60, P<0.01; TI=0.33 vs 0.37, P<0.01), together with the low lipid content of meat in both groups, confirmed the very high nutritional quality of meagre fillets
Influenza della dieta su alcuni parametri rilevati infra vitam e post mortem negli struzzi
No full text
Cinta Senese protein requirements from 30 to 65 kg: effects of different dietary protein levels on slaughtering traits and protein deposition indexes
No full textEffect of sodium nitrite replacement with natural antioxidants on aromatic profile and consumer acceptance of Cinta Senese dry-fermented sausage
No full textVitamin and water requirements of dairy sheep
No full textThe authors review the physiological role and the daily requirement of fat-soluble vitamins (A, D, E and K), vitamin C and water in dairy sheep. Regarding the vitamins, classical clinical symptoms and/or non-specific parameters, such as lowered production and reproduction rates are associated with their deficiencies or excesses. Until the last decade, these compounds were considered important only for the prevention of such alterations; currently, there is more emphasis on their function as the vitamins can play a key role in optimising animal health. In this respect, of particular interest is the action of the antioxidant vitamins (especially vitamin C, vitamin E and beta-carotene) in improving the efficiency of the immune system
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Gene structure analysis of donkey oxytocin-neurophysin I (OXT) gene and genetic variability detection
No full textOxytocin is a neurohypophysial peptide released into general
circulation from posterior pituitary gland. It is involved in different
physiological roles, including milk ejection from the mammary
gland, stimulation of uterine smooth muscle contraction
during labour and affects cognitive processes, tolerance, adaptation
and complex sexual and maternal behaviour. The main objective
of the present research was to determine the complete
donkey oxytocin-neurophysin I encoding gene (OXT) sequences
and to detect genetic diversity at this locus. Using the genomic
DNA as template, we sequenced and compared the whole OXT
gene of 5 Italian donkeys: 2 Amiatine, 2 Ragusana and 1 Grigio
Siciliano donkeys. On average the gene extends over 946 bp, composed
of 517 bp of exonic regions and 429 bp of intronic regions,
with an A/T and G/C content of about 27% and 73%, respectively.
Furthermore, the 5’ flanking region (876 bp) was sequenced. The
gene contains only three exons, ranging in size from 202 bp
(exons 2) to 155 bp (exon 3), and two introns of 315 bp (intron
1) and 114 bp (intron 2). The first exon encodes a peptide leader
(19 amino acids residues encoded by the nucleotides from 41 and
97), the nonapeptide hormone (from nucleotide 98 to 124), the
tripeptide processing signal (GKR) (from nucleotides 125 and
133) and the first 9 of 94 residues of neurophysin I; the second
exon encodes the central part of neurophysin I (67 aa), while the
third exon encodes the COOH–terminal region of neurophysin I
(18 aa). Among the different species of animals of species of
livestock animals, the OXT donkey gene sequence showed the
highest degree of similarity with the horse (98%) vs. ruminants
(75%) and camelids (76%). The comparison of the sequences
obtained allowed the identification of 5 SNPs: g.263A>G,
g.334A>G, g.436T>C and g.304A>C in intron 1 and g.124G>A in
promoter region. This last polymorphic site falls into a potential
binding site for the transcription factor GATA-1 (www.generegulation.
com). With this study, we provide the first contribution to
the characterisation of the genomic sequence of the OXT gene
and first examples of markers found at this locus in donkey. The
detected polymorphisms represent a good opportunity to carry
out studies focussed on the identification of significant association
with the physiological processes controlled by this hormone
as already performed in other species
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