Aflatoxin B1 adsorption by clays from water and corn meal

Influence of Soluble Feed Proteins and Clay Additive Charge Density on Aflatoxin Binding in Ingested Feeds

“…From infrared spectroscopy, Deng et al (2010) concluded that hydrogen bonds between AfB1 carbonyl groups and the hydration water of exchangeable cations in clays is the dominant bonding force under humid conditions. Aflatoxin adsorption from aqueous corn and peanut meal to feed additives was consistent with animal feeding studies that used the feed additives, Novasil, Novasil Plus, Astra-Ben 20, Astra-Ben 20A, sepiolite, and activated (Norit-A) carbon (Jaynes et al, 2007;Seifert et al, 2010). Feed additives that effectively reduced or prevented aflatoxin toxicity in feeding studies adsorbed more AfB1 from aqueous corn and peanut meal.…”

“…The modified method is thoroughly described in Jaynes et al (2007). Briefly, 96-well polystyrene microplates were coated with AfB1-BSA conjugate, washed, and saved for later use.…”

“…Grant & Phillips (1998) fitted AfB1 adsorption from water to Novasil data to the Langmuir and other isotherm equations to calculate adsorption capacities. Jaynes et al (2007) measured AfB1 adsorption from aqueous corn meal after extraction with 60% methanol. Siefert et al (2010) measured AfB1 adsorption to clays in aqueous peanut meal and total extractable aflatoxins in peanut meal/clay water extracts.…”

Nano-scale composition of commercial white powders for development of latent fingerprints on adhesives

“…The different crystal structures, chemistries, ordering and size distributions strongly affect the technological properties of the material and the addition of these components to the TiO 2 powders will affect the oleophobicity and hydrophobicity of the formulations [21,22]; indeed kaolin, alumina or silica are added to some fingerprint development powders to aid adhesion or to act to encapsulate nano-structured particles [23][24][25]. Variation of morphology and chemical composition of the coating, as well as coverage of the aluminosilicates over TiO 2 particles are the principle differences among the powder formulations studied, this will affect the interaction of the composite particles with the components of the latent prints, and may also assist in explaining the differences in background staining between different adhesive types.…”

“…Aluminosilicates and variations such as sodium aluminium silicates are commonly used as anti-caking agents in a range of products to ensure smooth flow of fine powder [19][20][21]. The different crystal structures, chemistries, ordering and size distributions strongly affect the technological properties of the material and the addition of these components to the TiO 2 powders will affect the oleophobicity and hydrophobicity of the formulations [21,22]; indeed kaolin, alumina or silica are added to some fingerprint development powders to aid adhesion or to act to encapsulate nano-structured particles [23][24][25].…”