The water uptake and erosion of pectin disc increased progressively with the swelling time. The bioadhesion
of dried pectin discs decreased when either the discs were hydrated or the buccal tissue was wet with a small volume of medium. The influencing factors such as pectin type, pectin to lactose ratio, and sweetener type on the formulations were investigated. The results demonstrated that buccal discs prepared from pectin with a high degree of esterification (DE) showed a weaker and more friable characteristic than that with low DE. Decreasing pectin to lactose ratio resulted in the high dissolution rate with low bioadhesive properties. Addition of sweetener in the formulations also affected the hardness, friability, and bioadhesive GSK1120212 properties of the discs. The pectin discs containing sweetening agent showed a higher drug release than those
without sweetener. The results suggested that pectin-based this website bioadhesive discs could be used to deliver carbenoxolone sodium in oral cavity.”
“This study analyzed the effects of ultraviolet curable urethane acrylate resin (UV resin) treatments on surface homogeneity, dimensional stability, and change in colors of medium- and small-diameter softwoods produced in Taiwan. The UV resins were formulated with urethane acrylate oligomer/methyl methacrylate (MMA) monomer by the weight ratio of 50/50, 60/40, 70/30, 80/20, and 90/10, and 3% of photoinitiator (benzil dimethyl ketal) by the total weight of UV resins was added, respectively. Four kinds of softwoods, including Taiwanina, China fir, Taiwan incense cedar and Japanese fir with a diameter of 10-15 cm were obtained from Hui-Sun Forest Station, Taiwan. Results show that the oligomer derived from 2-hydroxyethyl methacrylate (2-HEMA) and polymeric toluene diisocyanate (PTDI) by the molar ratio of NCO/OH = 1.0 could be FK506 readily synthesized and the prepared UV resin were also easily applied to the woods at room temperature and normal pressure. The surface hardness and moisture excluding efficiency (MEE) of woods were markedly
enhanced and correlated with the increased in oligomer content of the UV resins as well as the homogeneity of softwood surfaces were also improved. According to the antiswelling efficiency (ASE), the increased in dimensional stability of woods were achieved; especially for the lower specific gravity China fir had the greatest improved efficiency of 60.68% at oligomer/MMA ratio of 80/20. In addition, a massive, colorful, and warm feeling in sense of sight on UV resin-treated wood, which would appeal to most people, was also obtained. (C) 2011 Wiley Periodicals, Inc. J Appl Polym Sci 121: 1647-1653, 2011″
“This article reports the cointercalation of acrylic acid (AA) and 2-acrylamido-2-methylpropane sulfonic acid (AMPS) in the interlayer region of Mg(2)Al layered double hydroxide (LDH) and the application of this inorganic-organic composite material in the field of water superabsorbent.