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Application of Molecular Distillation Process to Extend the True Boiling Point Curve of Petroleum Residues 400 ℃ ＋

Journal of Chemistry and Chemical Engineering 2011年第2期5卷 116-120页

作者： Erica Roberta Lovo da Rocha melina savioli lopes Maria Regina Wolf Maciel Rubens Maciel Filho Cesar Benedito Batistella Lilian Carmem Medina Separation Process Development Laboratory （LDPS） School of Chemical Engineering University of Campinas Unicamp Campinas-SP 13083-970 Brazil Cenpes/Pdp/Tpap/Petrobras Brazil

True Boiling Point （TBP） distillation is one of the most common experimental techniques for determination of petroleum properties. The methods for performing TBP distillation experiments are described by ASTM D2892 and by ASTM D5236. However, these methods are established for petroleum fractions that reach temperatures up to 565 ~C. In this work, two petroleum residues were distilled in a falling film molecular distillation prototype and the data were used to obtain the extension of the TBP curve above a temperature of 565 ~C. It was possible to extend the TBP curve of both petroleum up to temperatures close to 700 ~C with consistency and continuity in comparison to the standard curve. In addition, an amount of raw material that was been treated as residue could be reused.

关键词： Molecular distillation true boiling point petroleum fraction.

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Breast Milk Micronutrients in Lactating Mothers from Ribeirao Preto(SP),Brazil

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Food and Nutrition Sciences 2014年第13期5卷 1196-1201页

作者： Marco Túlio Soares Andrade Luiz Antonio Del Ciampo Ieda Regina lopes Del Ciampo Ivan savioli Ferraz Fernando Barbosa Junior Department of Puericulture and Pediatrics Faculty of Medicine of Ribeirao PretoUniversity of Sao PauloSao PauloBrazil Department of Clinical Toxicological and Bromatological AnalysesFaculty of Pharmaceutical Sciences of Ribeirao PretoUniversity of Sao PauloSao PauloBrazil

Breast milk is the ideal food for infants and should be consumed as the exclusive food for the first six months and then be complemented up to two years of age. The aim of this study is to determine breast milk’s content of macro and micronutrient in lactating mothers from the Ribeir?o Preto (SP) region, in Brazil. A cross-sectional study was conducted with breast milk samples of 70 mothers from the city of Ribeir?o Preto (SP). The samples were analyzed in order to determine iron, copper, zinc, calcium and magnesium concentrations. They were analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). The study was approved by the Research Ethics Committee of the University Hospital, Faculty of Medicine of Ribeir?o Preto, University of S?o Paulo, and all subjects gave written informed consent to participate. The current study revealed that all 70 lactating mothers were healthy and delivered babies more than 38 weeks gestation;71.4% of them were younger than 30 years and 47.1% were primiparae. The iron, copper, zinc, calcium and magnesium concentrations detected in milk were 2.7 ± 0.4, 0.4 ± 0.02, 3.6 ± 0.2, 142 ± 21.6 and 39.8 ± 4.2 mg/L, respectively. Therefore, it can be concluded that in the present sample, except for calcium, all other mineral concentrations were adequate for the infant’s requirements according to the Dietary Reference Intake (DRI).

关键词： Human Milk Breastfeeding Micronutrients ICP-MS

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