Water salinity effects on performance and rumen parameters of lactating grazing Holstein cows.

Eighteen multiparous lactating grazing Holstein cows, 9 ruminally cannulated, average 136.1 +/- 14.6 days in milk, were randomly assigned to three treatments consisting of water containing different levels of total dissolved solids (TDS; mg/l): Treatment 1 = 1,000; Treatment 2 = 5,000 and Treatment 3 = 10,000, at the Experimental Dairy Unit at Rafaela Experimental Station (31 degrees 11'S latitude) during summer 2005.

[Total bacterial count in raw milk from the dairy farms that characterize the zone northwest of Santa Fe and south of Santiago del Estero].

A total of 6,998 raw milk samples of bulk tank, belonging to 55 dairy farms associated to the Cooperativa Tambera Nueva Alpina Ltda., were collected between the years 1993 and 2002. The Total Mesophilic Aerobic Microorganisms Count was analyzed, obtaining a medium value of 1.

[Nutritional study relative to proteins, energy, and calcium in children eating school meals].

Food consumption and nutritional status were evaluated on 419 children having meals at school located in the surrounding of Santa Fe (Argentina). The protein, energy and calcium content of the meals were analyzed. Anthropometrical evaluation was made by the following indicators: weight to age, height to age and weight to height.

[Thermal inactivation of the enzymes polyphenoloxidase and peroxidase in Swiss chard (Beta vulgaris, cicla)].

The freezing of Swiss chard has just started in Argentina. The blanching stage is fundamentally important to avoid damage of sensorial and nutritional properties during storage. If the process is not properly carried out, darkening can seriously affect the product.