Influence of breeds genetic composition on the quality of milk from primiparous cows

Abstract

HO x 1/8 Gyr) raised under similar handling and feeding conditions. The sample collection was carried out between January and March 2013. To compare the quality of milk among breeds genetic compositions, the study was set up in a completely randomized design. Data of variables fat, protein, lactose contents, fat free dry matter (DDE), urea, somatic cell count, electrical conductivity, pH, titratable acidity and production were submitted to analysis of variance using the Tukey test at 5% probability for comparison of means between treatment 1 (1/2 HO x 1/2 Gyr), treatment 2 (3/4 HO x 1/4 Gyr) and treatment 3 (7/8 HO x 1/8 Gyr). Statistical analyses were performed using the SISVAR ®-UFLA software. Correlation analysis between variables was performed using the ASSISTAT software. The results demonstrate that the genetic makeup of the different races holstein / Gyr primiparous cows did not affect the quality of the milk produced. The values of the chemical constituents of milk have been considered suitable for human consumption. Titratable acidity and milk production were higher for 3/4 Holstein/Gyr animals.

Kinetics of epoxidation by a Musa paradisiaca chloroperoxidase

“…Epoxidations of various organic compounds having carboncarbon double bonds using chloroperoxidase has been studied. [11][12][13][14][15] However, in the most of the studies reported so far only chloroperoxidase from C. fumago, a marine fungus, has been used. 17 The chloroperoxidase from other sources are not commercially available and have rarely been used in epoxidation reactions.…”

“…Extensive studies on carbon-carbon double bonds have been reported in the literature giving varying degrees of enantiomeric excesses of the epoxides products formed using chemical and biological catalysts. [5][6][7][8][9][10][11][12][13][14][15]19,28,29 However, all the reported studies either involve expensive metal catalysts or purified enzymes. The present communication reports epoxidation using concentrated juice of M. paradisiaca (banana) stem as the crude enzyme.…”

“…[6][7][8][9][10][11] Epoxidation of varieties of compounds containing carboncarbon double bonds have been reported in the literature using biocatalytic methods. 6,11,[13][14][15] However, epoxidation by heme chloroperoxidase is the most convenient and promising enzymatic process 11,13,14 and is still an area of active research. 16 In the most of the epoxidation reactions involving heme chloroperoxidase, the enzyme from Caldariomyces fumago, a marine fungus, has been used.…”

“…19 There is a recent report on the epoxidation of isosafrol catalyzed by radish and turnip peroxidases, but these peroxidases have not been purified and characterized. 15 Yadav et al 20 have purified and characterized a chloroperoxidase from Musa paradisiaca stem juice and have demonstrated the N-oxidation catalyzed by it. 21 The M. paradisiaca chloroperoxidase being an enzyme present in plant juice of an agro waste, banana stem, is a more convenient biocatalyst in comparison to the chloroperoxidases of C. fumago and A. aegerita purification of both of which require fungal growth of more than a week.…”

“…Therefore, there is emphasis on the development of processes based on biocatalytic methods . Epoxidation of varieties of compounds containing carbon‐carbon double bonds have been reported in the literature using biocatalytic methods . However, epoxidation by heme chloroperoxidase is the most convenient and promising enzymatic process and is still an area of active research .…”