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    Effectiveness of primate seed dispersers for an ''oversized'' fruit, Garcinia benthamii
    (2015-10-01) Kim R. McConkey; Warren Y. Brockelman; Chanpen Saralamba; Anuttara Nathalang; National Institute of Advanced Studies, Bangalore; Thailand National Center for Genetic Engineering and Biotechnology; Mahidol University
    © 2015 by the Ecological Society of America. The largest fruits found in tropical forests may depend on complementary seed dispersal strategies. These fruits are dispersed most effectively by megafauna, but populations can persist where megafauna... are absent or erratic visitors. Smaller animals often consume these large fruits, but their capacity to disperse these seeds effectively has rarely been assessed. We evaluated the contributions of gibbons (Hylobates lar) and other frugivores in the seed
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    QT dispersion in childhood obstructive sleep apnoea syndrome
    (2011-04-01) Anant Khositseth; Palinee Nantarakchaikul; Teeradej Kuptanon; Aroonwan Preutthipan; Mahidol University
    The difference between maximal and minimal QT interval and corrected QT interval defined as QT dispersion and corrected QT dispersion may represent arrhythmogenic risks. This study sought to evaluate QT dispersion and corrected QT dispersion... QT and RR intervals. Means QT dispersion and corrected QT dispersion were significantly higher in obstructive sleep apnoea syndrome than controls, 52 plus or minus 27 compared to 40 plus or minus 14 milliseconds (p equal to 0.014), and 71 plus
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    Dissolution improvement of high drug-loaded solid dispersion
    (2006-06-02) Siriporn Okonogi; Satit Puttipipatkhachorn; Chiang Mai University; Mahidol University
    This study focused on an investigation of a high drug-loaded solid dispersion system consisting of drug, carrier, and surfactant. Solid dispersions of a water-insoluble ofloxacin (OFX) with polyethylene glycol (PEG) of different molecular weights..., namely binary solid dispersion systems, were prepared at drug to carrier not less than 5:5. Polysorbate 80, a nonionic surfactant, was incorporated into the binary solid dispersion systems as the third component to obtain the ternary solid dispersion
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    Nonredundancy in the dispersal network of a generalist tropical forest tree
    (2011-07-01) Kim R. McConkey; Warren Y. Brockelman; ; Thailand National Center for Genetic Engineering and Biotechnology; Mahidol University
    Plant species with generalized dispersal mutualisms are considered to be robust to local frugivore extinctions because of redundancy between dispersal agents. However, real redundancy can only occur if frugivores have similar foraging and ranging... patterns and if fruit is a limiting resource. We evaluated the quantitative and qualitative contributions of seed dispersers for an endochorus mast-fruiting species, Prunus javanica (Rosaceae) in Khao Yai National Park, Thailand, to evaluate the potential
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    Improvement of dispersion and stability of fine titanium dioxides in silicone fluid using poly(ethylene oxide-b-dimethylsiloxane-b-ethylene oxide) triblock copolymer: Effects of the dispersant structure and concentration
    (2013-11-06) Nisanart Traiphol; Surachet Toommee; Metha Rutnakornpituk; Rakchart Traiphol; Supatra Jinawath; Chulalongkorn University; Naresuan University; Mahidol University
    Suspensions of fine titanium dioxides were prepared in silicone fluid using newly synthesized poly(ethylene oxide-bdimethylsiloxane- b-ethylene oxide) triblock copolymers as dispersants. The block length of the copolymers is systematically modified... to allow fine tuning of the interfacial interaction between titanium dioxide particles and the silicone medium. The properties of the suspension including its rheological behavior, sedimentation rate, particle size distribution, and particle dispersion were
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    Nutmeg-vertebrate interactions in the Asia-Pacific region: Importance of frugivores for seed dispersal in Myristicaceae
    (2013-01-01) Shumpei Kitamura; Pilai Poonswad; Ishikawa Prefectural University; Mahidol University
    In tropical forests, large frugivores are assumed to be important seed dispersers for many large-seeded trees such as the Myristicaceae, a widespread and common family. However, not all frugivores are effective seed dispersers, and understanding... for evaluating the effects of disperser loss for these trees. Studies of fruit characteristics of Myristicaceae were highly biased toward morphological information, and few studies examined reproductive phenology or fruit chemistry. We identified 338 instances
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    Bushmeat poaching reduces the seed dispersal and population growth rate of a mammal-dispersed tree
    (2009-07-01) Jedediah F. Brodie; Olga E. Helmy; Warren Y. Brockelman; John L. Maron; University of Montana; The Institute of Science and Technology for Research and Development, Mahidol University; University of Montana College of Forestry and Conservation; Thailand National Center for Genetic Engineering and Biotechnology
    Myriad tropical vertebrates are threatened by overharvest. Whether this harvest has indirect effects on nonhunted organisms that interact with the game species is a critical question. Many tropical birds and mammals disperse seeds. Their overhunting... in forests can cause zoochorous trees to suffer from reduced seed dispersal. Yet how these reductions in seed dispersal influence tree abundance and population dynamics remains unclear. Reproductive parameters in long-lived organisms often have very low
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    Polymer-magnesium aluminum silicate composite dispersions for improved physical stability of acetaminophen suspensions
    (2009-04-08) Thaned Pongjanyakul; Satit Puttipipatkhachorn; Khon Kaen University; Mahidol University
    The aims of this study were to characterize the morphology and size of flocculates and the zeta potential and rheological properties of polymer-magnesium aluminum silicate (MAS) composite dispersions and to investigate the physical properties... of acetaminophen (ACT) suspensions prepared using the composite dispersions as a flocculating/suspending agent. The polymers used were sodium alginate (SA), sodium carboxymethylcellulose (SCMC), and methylcellulose (MC). The results showed that SA, SCMC, and MC
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    Nondestructive rheological measurement of aqueous dispersions of solid lipid nanoparticles: Effects of lipid types and concentrations on dispersion consistency
    (2010-09-01) Nispa Seetapan; Piyawan Bejrapha; Wanwisa Srinuanchai; Satit Puttipipatkhachorn; Uracha Ruktanonchai; Thailand National Metal and Materials Technology Center; Thailand National Science and Technology Development Agency; Mahidol University
    Purpose: To investigate dispersion consistency of solid lipid nanoparticles as functions of lipid types and concentrations. Methods: Viscoelastic measurement at an application of low stress was employed to characterize the internal microstructure... developed within the dispersions. Pure triglycerides with different length of fatty acid chains, trimyristin (C14), tripalmitin (C16), and tristearin (C18) were studied with respect to the partial triglyceride with C22 chain length (Compritol 888 ATO
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    Fruit production and seed dispersal of Choerospondias axillaris (Anacardiaceae) in Khao Yai National Park, Thailand
    (Mahidol University. Mahidol University Library and Knowledge Center, 2001) Pranom Kunsakorn; Warren Y. Brokelman; Sompoad Srikosamatara; Pilai Poonswad