9 research outputs found
Realizations of -Minkowski space, Drinfeld twists and related symmetry algebras
Realizations of -Minkowski space linear in momenta are studied for
time-, space- and light-like deformations. We construct and classify all such
linear realizations and express them in terms of generators.
There are three one-parameter families of linear realizations for time-like and
space-like deformations, while for light-like deformations, there are only four
linear realizations. The relation between deformed Heisenberg algebra, star
product, coproduct of momenta and twist operator is presented. It is proved
that for each linear realization there exists Drinfeld twist satisfying
normalization and cocycle conditions. -deformed
-Hopf algebras are presented for all cases. The
-Poincar\'e-Weyl and -Poincar\'e-Hopf algebras are discussed.
Left-right dual -Minkowski algebra is constructed from the transposed
twists. The corresponding realizations are nonlinear. All known Drinfeld twists
related to -Minkowski space are obtained from our construction.
Finally, some physical applications are discussed.Comment: 35 pages, improved version accepted for publication in EPJ
Influence of ham weight, trimming and pressing on Istrian dry-cured ham seasoning loss
Influence of raw ham weight, trimming form and pressing on seasoning weight loss of Istrian dry-cured hams were studied. Swine thighs were shaped traditionally with skin and subcutaneous fat removed. The pelvis bones were left in the ham (B hams) or experimentally deboned (boneless or BL hams). After trimming the raw hams were weighted and classified into the weight classes. The hams were pressed after dry salting with different loads. High seasoning weight loss (46.31 %) of Istrian hams was expected due to raw ham skinning. However, deboning had no influence on differences in seasoning weight loss. Significantly higher weight loss of light class hams suggest to use raw hams heavier than 10 kg and 9 kg after B and BL dressing, respectively. There was no significant press load effect on seasoning weight loss
Blood serum metabolites and meat quality in crossbred pigs experiencing different lairage time
Pigs of two crosses: A (Duroc x Swedish Landrace) x Pietrain (n=24) and B (Swedish Landrace x Large White) x Pietrain (n=26) were used to investigate the effects of different lairage time (2 and 24 hours) on levels of stress and meat quality traits. No direct effect of lairage time on cortisol, lactate, electrolytes and meat quality parameters was observed. However, after long lairage time, pigs showed lower level of glucose and higher CK, AST and ALT activity. Crossbred B pigs exposed to short lairage time, showed higher blood lactate, sodium, and potassium level, higher drip loss and lower pHi, whereas there were no significant differences between the crossbreeds in the long lairage group. The results indicate that long lairage time decreases blood glucose level and produces signs of muscle damage. In the short lairage period, the crossbreed B showed a higher response to pre-slaughter handling affecting the meat quality