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The vibrational predissociation of the van der Waals complex HeBr2 have been carry out by wave packet propagation methods. This allow us to understand time dependent process. In the present, two interaction potential between the rare gas and the halogen have been used. The present work accomplish a study of a wide amount of quantum numbers for the Br2 in the excited electronic state, since the low vibrational quantum number (ʋ = 8) to near of the dissociation limits (ʋ = 44). The present methods have good agreement with former results. [ABSTRACT FROM AUTHOR]

Objectives: to verify the effect of three storage conditions on human milk acidity and to determine the quantity of lipids, total solids, ash, calcium, and total proteins. Methods: the sample comprised healthy milk donors to the Human Milk Bank of the University Hospital of Maringá (n37), State of Paraná, Brazil. The quantities of lipids, protein, total solids, ash and calcium were measured, as well as acidity. The study protocol included three storage conditions: time zero, after 4h storage at room temperature and after 24h under refrigeration. Results: the average concentrations of nutrients found in this study were comparable to those described in milk from lactating mothers of developed countries or other Brazilian regions, which is suitable forfeeding newborns. As for acidity, variations were observed between individuals for the storage condi- tions involving 4h and 24h, which did not occur for the condition of Oh. A weak correlation between the variables of acidity and protein content was observed, as well as for acidity and calcium. Conclusions: the acidity does not have a sign iji- cant influence on the concentration of the nutrients, at least under the storage conditions studied here. The best way to preserve human milk is to freeze it imme- diately after collection. [ABSTRACT FROM AUTHOR]

We have studied the ionization and dissociation of cyclopropane through of multiphoton absorption process at 532 and 355 nm. The experiments were performed using the second and third harmonic wavelengths of a Nd: YAG laser system coupled to time-of-flight mass spectrometer. The ionic fragments observed are: m/e = 39,26 y 24, corresponding to C3H3+, C2H2+ y C2, [ABSTRACT FROM AUTHOR]

This work we have measured the kinetic energy distribution of C+ fragments arising from 5 KeV collision-induced dissociation of CO+ ions with helium. These measurements allow us to determine the kinetic energy release (KER) in this process of dissociation. High KER component is evidence of high population of CO+ vibrationally excited. [ABSTRACT FROM AUTHOR]