148 research outputs found
Relazioni tra muscolosità stimata in vivo e produzione di latte in vacche Pezzate Rosse.
No full textComparison of Two Isoflurane Delivery Systems for Maintaining Anesthesia in Horses: End-Tidal Closed-Loop Target-Controlled Versus Out-Of-Circuit Vaporizer
No full textApplicability of different test day models and effect on time at first evaluation of Italian Simmental bulls
No full textIl presente lavoro si prefigge di valutare l’effetto che l’ap- plicazione di diversi modelli test day esercita sul numero di bovine e d’allevamenti coinvolti nel pro- gramma di valutazione, sul numero di tori valutati e sull’età degli stessi alla prima valutazione in una popolazione bovina a ridotta dimensione aziendale. L’applicazione di modelli univariati e multivariati a regressioni casuali comporta una notevole riduzione del numero di bovine e d’allevamenti che apportano informazioni fenotipiche. Tale perdita determina un aumento dell’età alla prima valutazione dei tori che si ripercuote sul progresso genetico annuo
Comportamento e produzione di latte in bovine Frisone all'inizio della stagione di pascolo.
No full textAbdominal ultrasound features and reference values in 21 healthy rabbits.
No full textThis study aimed to determine the ultrasonographic features and reference values of the abdominal anatomy in mixed-breed dwarf rabbits. Complete abdominal ultrasonographic examination was performed in 21 mixed-breed rabbits (12 males and 9 females) referred for
examination to the Department of Animal Medicine, Production and Health, University of
Padua, Italy. All animals were sedated during the procedure. The ultrasonographic anatomy of the abdomen was determined, including measurement (mean±SD) of the right kidney (length 2.87±0.34 mm; width 1.62±0.17 mm; height 1.66±0.14 mm) and left kidney (length 2.86±0.33 mm; width 1.72±0.19; height 1.58±0.15 mm), left adrenal gland (width 0.38±0.11 mm; length 0.71±0.14), right adrenal gland (width 0.34±0.08 mm; length 0.73±0.15 mm) and thickness of the walls of the stomach (0.10±0.01 mm), pylorus (0.28±0.04 mm), duodenum (0.19±0.04 mm), sacculus rotundus (0.22±0.06 mm), caecum (0.08±0.01 mm), appendix (0.19±0.04 mm), spiral loop of the ascending colon (0.14±0.04 mm) and distal colon (0.10±0.02 mm). A significant positive correlation between bodyweight and kidney size, adrenal gland length, stomach wall and sacculus rotundus wall was detected
Change in body condition score of Holstein cows as affected by parity and mature equivalent milk yield
No full textCows from 25 dairy herds were scored for body
condition at 3-mo intervals for over 2 yr to study the
pattern of changes during lactation and the effects of
parity and milk yield capability of cows on changes in
body reserves. Data were recorded for 1395 Holstein
cows grouped into three parity classes and five classes
of mature equivalent milk yield. The analysis model
accounted for nearly 70% of the variation in body
condition score. Body reserves decreased during early
lactation until about 100 DIM and were restored during
mid and late lactation. The pattern of change in
body condition score varied among lactations and
dairy merit of cows. Depletion and subsequent recovery
of body reserves were less intense for primiparous
cows than for multiparous cows. Loss of body condition
scores was higher and more prolonged for cows of
higher dairy merit. The minimum body condition
score occurred at 3 mo after calving for the worst
yielding cows and at 4 mo after calving for the best
yielding cows; the highest yielding cows had twice the
loss in body condition as the lowest yielding cows.
General equations are presented as a proposed guideline
to examine changes in body condition score of
Holstein cows of different parities and dairy merit
Accrescimento, rilievi somatici e muscolosita dei torelli Marchigiani, Chianini e Romagnoli in performances test.
No full textEvaluation of quality and safety of beef hamburgers fortified with Ozonated Extra Virgin Olive Oil
No full textThis study investigates the impact of Ozonated Extra Virgin Olive Oil (OEVO) on the shelf life and quality of beef hamburgers during a 15-day storage period. Firstly, the Extra Virgin Olive Oil (EVO) was ozonated, and its oxidative stability and Fatty Acid Profile (FAP) were evaluated before and after ozonation. The oxidative stability of EVO decreased insignificantly (p > 0.05) after ozonation with a 3.54% Reduction in Induction Period (RIP). However, ozonation significantly increased (p 0.05) between the redness (a* value) of hamburgers on different days, excluding days 7, 13, and 15. The combined properties of EVO and ozone had a prominent antimicrobial effect, increasing the shelf life of the beef hamburgers by reducing the number of Total Viable Count (TVC), Lactic Acid Bacteria (LAB), Enterobacteriaceae (EB), and Coliforms (CF)
Bias and accuracy of single milking testing schemes to estimate daily and lactation milk yield
No full textThis study evaluated the adequacy of
an alternate a.m.-p.m. testing scheme for
milk yield in comparison with the official
test method based on weighing two
milkings within 24 h. A total of 88,558
single test day milking weights from
15,670 Italian Friesian cows in 610 herds
in the province of Milano (Italy) were
collected between September 1991 and
October 1992. Ratios were computed for
daily milk yield to a.m. and p.m. milking
weights (direct yield ratios) and ratios of
a.m. and p.m. milking weights to daily
milk yield (inverse yield ratios). Analysis
of variance indicated that the milking
interval is the most important source of
variation for yield ratios. Factors for estimating
daily milk yield from single
milking weights adjusted for milking intervals
were derived through regression
analysis of direct and inverse yield ratios
on the length of the milking interval.
Daily milk yield was estimated more
precisely and accurately when adjustment
factors were used than when single
milking weights were doubled. The doubling
of a.m. and p.m. milking weights
overestimated and underestimated (5%
on average) daily milk yield, respectively.
For 305-d lactation yield, accuracies
of these methods were comparable.
In conclusion, alternate recording of a.m. and p.m. milking weights led to reliable
estimates of milk yield. Effects of the
alternate a.m.-p.m. testing scheme on estimates
of milk components and genetic
evaluation of dams of sires should be
investigated
- …
