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Effect of silicification on the water sorption properties of microcrystalline cellulose II BJPS
Camargo,John Rojas; Garcia,Carlos Andrés Ortiz.
The aim of this study was to investigate the water sorption behavior of cellulose II:SiO2 composites and to determine the influence of silicification on this property. These composites were prepared by spray-drying at a cellulose II:SiO2 ratio of 98:2, 95:5, 90:10 and 80:20. The nonlinear models of Guggenheim-Anderson-de Boer (GAB), Generalized D'Arcy and Watt (GDW) and Hailwood & Horrobin (HH), were used for the characterization and analysis of the isotherms. The infrared and powder X-rays characterization showed no signs of chemical modification or change in the polymorphic form of cellulose II by SiO2. The parameters derived from these models indicated that only a 20% level of silicification was able to hinder the water sorption properties of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cellulose II; Silicon dioxide; Silicification; Water sorption isotherms; Disintegration.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000100016
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Histological Changes in Ovaries of Mice Exposed to Butea monosperma: Preliminary Study International Journal of Morphology
Gupta,Neelam; Singh,Gajendra; Singh,S. M; Reddy,K. R. C.
In Ayurvedic practice Butea monosperma (Palash) is in clinical use for hundreds of years as a contraceptive. Seeds of Butea monosperma are also used as an anthelmitic (Ansani et al., 1979) and antimicrobial (Avirutnant & Pongpan, 1983). Butea monosperma (Fabaceae family) locally known as Palash (Dhak) if given for 3 consecutive days acts as an antifertility agent for which it has been is traditionally used since time immemorial. The objective of the present study was to search the effect of Butea monosperma seeds on the ovary of mice. Observations in the present study were massive degeneration of ova in almost all the follicles, irrespective of the stage of their development. The ova from treated animals showed different stages of necrotic process....
Tipo: Journal article Palavras-chave: Palash; Butea monosperma; Apoptosis; Disintegration; Follicles.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-95022010000400051
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