Publication date: November 2017
Source:Journal of Dairy Science, Volume 100, Issue 11
Author(s): F. Castellani, A. Vitali, N. Bernardi, E. Marone, F. Palazzo, L. Grotta, G. Martino
This study aimed to evaluate the effect of dietary integration of dried olive pomace (DOP), a by-product of olive oil separation, on nutritional and aromatic properties of milk and cheese. Twenty dairy cows were divided into 2 groups that were balanced for milk yield, parity, and days in milk. The control group was fed a conventional diet (20 kg of dry matter/head per day), whereas the experimental group (EG) received the conventional diet supplemented with DOP as 10% of dry matter. During the trial, milk yield was recorded and the samples of milk, cheese, total mixed rations, and DOP were collected and analyzed to determine the chemical–nutritional composition and aromatic profile. Atherogenic and thrombogenic indices were calculated on the basis of the fatty acid (FA) profile of milk and cheese. Data were analyzed according to the mixed model for milk yield and chemical composition, including cows nested within treatment as a random effect, whereas the general linear model was used for the analysis of cheese parameters. Differences were assessed by Tukey's test. The EG diet had a lower content of palmitic, stearic, and linoleic acids and a higher level of oleic acid compared with the control. Dietary DOP integration did not affect milk yield and composition with the exception of protein content, which was greater in EG and significantly affected by diet and period. Instead, period was found to be significant for fat and casein in both groups. Dietary supplementation with DOP modified the FA profile of milk and cheese. There was a decrease in short- and medium-chain FA, but significance was achieved only for palmitic acid. The stearic, isomer trans of oleic (in particular vaccenic acid), oleic, and isomer trans of linoleic acids significantly increased. Monounsaturated FA increased in EG milk and cheese and saturated FA were significantly lower, whereas no difference was marked between the groups regarding level of polyunsaturated FA. Supplementation with DOP reduced atherogenic and thrombogenic indices and increased conjugated linoleic acid in both milk and cheese. The free fatty acids, ketones, lactones, esters, and phenylalanine catabolites were increased in raw milk, whereas only leucine metabolism was affected by diet in pasteurized milk cheese at both 1 and 30 d of ripening. The present results pointed out that DOP supplementation may improve the nutritional and nutraceutical properties and modify the aroma of milk and derived cheese.
http://ift.tt/2hBrXwS
Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com
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! # Ola via Alexandros G.Sfakianakis on Inoreader
Η λίστα ιστολογίων μου
Τετάρτη 11 Οκτωβρίου 2017
Dietary supplementation with dried olive pomace in dairy cows modifies the composition of fatty acids and the aromatic profile in milk and related cheese
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- Linear IgA bullous dermatosis associated with amyo...
- Milia: a useful clinical marker of CYLD mutation c...
- Microphthalmia with linear skin defects (MLS) synd...
- Linear IgA bullous dermatosis associated with amyo...
- Milia: a useful clinical marker of CYLD mutation c...
- Scorpion bite-induced ischaemic stroke
- Oesophageal ischaemia: an uncommon cause of chest ...
- Posterior fossa progressive multifocal leukoenceph...
- Subclinical meningoventriculitis as a cause of obs...
- A unique case of nephrogenic systemic fibrosis fro...
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- Cryptococcus neoformans osteomyelitis and intramus...
- Olfactory bulb agenesis with normal sexual hormones
- Hydatid cyst of the thigh: a challenging diagnosis
- Syncope from radiation-induced baroreceptor failure
- Live 'Baby dance among the red blood cells
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