Contenido de nutrientes minerales en leches de vaca y derivados de Argentina / Mineral nutrient content in cow milk and dairy products in Argentina

Cow milk and dairy products supply essential inorganic elements for humans, and constitute the most important source of bioavailable calcium in our diet. In order to obtain data about mineral nutrient composition of dairy products that are produced and sold in Argentina, the contents of Ca, P, Mg, Na, K, Fe, Zn and Cu in whole and low fat fluid milk, dried milk and yogurt were analyzed. P was assessed by a colorimetric method, and the other elements by atomic absorption spectroscopy. In raw milk, the mineral content shows a certain degree of variability, in addition to the variability introduced by the different processing conditions, in order to meet the requirements prescribed by trade regulations and to produce dairy products. In all cases, skimming increases the concentration of mineral nutrients, which is especially remarkable in Ca contained in skimmed milk powder. In yogurt, added milk solids like dried milk or evaporated milk appreciably increase the mineral content, even more so if ultrafiltrates are used. These ultrafiltrates increase the Ca/P ratio, which probably improves Ca bioavailability. The results obtained in these analyses provide data that are not yet available from the National Table of Food Composition, and which prove necessary and fundamental for nutritional and dietary evaluation.

[The modified Shouldice inguinal hernioplasty. A clinical contribution]. / Ernioplastica inguinale secondo Shouldice modificata. Contributo clinico.

The Authors present their personal experience in the surgical treatment, using the Shouldice modified method, of 85 cases of patients suffering from inguinal hernia. The rarity of general and local complications and the relatively low percentage of relapse, if compared with other surgical methods, testify to the validity of this technique.

[Clinical contribution to the knowledge of retroperitoneal tumors of the pelvic excavation]. / Contributo clinico alla conoscenza dei tumori retroperitoneali dello scavo pelvico.

Two cases of primitive retroperitoneal tumors of the pelvic excavation have been reported: a neurinosarcoma and a liposarcoma. Particular, this work emphasizes the rarity of the neurinosarcoma in that seat, the atypical clinical presentation, the complex diagnostic researches performed and the problems of the differential diagnosis. In the diagnosis of these neoplasms, the Authors emphasize, the main role performed by the "classic" radiology and its most recently acquired means as (ECO, TAC, EMR). These can give precise informations about the seat and the size of the neoplasms and especially, about it's relationship with the adjacent tissues. By using these new means, other examinations some what dangerous, can be avoided. The Authors conclude that from the therapeutical point of view, surgery is still the main weapon against these neoplasms, even if sometimes it is demolishing and does not sensibly improve the prognosis. Surgery can be associated with radiotherapy and/or chemotherapy.