Dissolution of fine and intermediate sized galena particles and their interactions with iron hydroxide colloids.

Dissolution of fine (-10 microm) and intermediate (+10-53 microm) galena particles was studied in the presence and absence of iron hydroxide colloids at pH 9 with nitrogen and oxygen purging. X-ray photoelectron spectroscopy (XPS) measurements and ethylene diamine-tetra acid (EDTA) extraction of the galena particles after dissolution indicate that galena dissolution is strongly dependent on particle size. Fine galena particles produced a much higher amount of lead hydroxide species per surface area than intermediate galena particles.

Serum IgE concentrations in the neonatal period.

The aim of the present study was to evaluate the IgE-mediated response as a predictable index of immunosensitization to different types of feeding (breast milk, adapted formula, soya formula and serum protein hydrolyzate formula) in the first days of life. The study population included 231 newborns (128 males and 103 females). There was a family history of atopy (at least 1 parent with an atopic disease) in 116 subjects at risk for allergy.

[A clinical case of autoimmune neonatal thrombocytopenia].

The Authors, after briefly the classification of neonatal thrombocytopenia (NT) and the causes Autoimmune Neonatal Thrombocytopenia (AINT), present the case of thrombocytopenic purpura in a neonate born of a mother affected by asynptomathic idiopathic thrombocytopenic purpura (PTI). The AINT diagnosis, suspected on the basis of the clinical state, is confirmed either by the presence in the mother's serum of free antibody antiplatelet, or measurement of maternal platelet associated IgG (PAIgG). In conclusion the Authors report the management in the case of neonates at "risk" for AINT.

[Determination of various fractions of complement (Cl, C3c, C3a, C4) in a population of healthy neonates].

The authors have studied plasma levels of various complement fractions (C1,C3c,C3att.,C4) in 127 newborns. Referring to gestation period the studied subjects were divided as follows: 25 newborns (less than 37 weeks), 78 newborns (37-41 weeks), 21 newborns (more then 41 weeks).