The adsorption and desorption efficiencies on flavonoids and polyphenols from Eucommia ulmoides leaves by different resins were investigated, and the most suitable resin for preparation of Eucommia ulmoides leaves antioxidant was chosen. Then the crude extract of Eucommia ulmoides leaves was adsorbed by resin, and the resin was eluted by 20%, 40%, 60% and 80% (in volume) ethanol elution solutio...

BACKGROUND This study compared the storage modulus (E'), the loss modulus (E'') and the loss tangent (tan δ) of various flowable resin composites. MATERIAL AND METHODS Grandio Flow (GRF), GrandioSo Heavy Flow (GHF), Filtek Supreme XTE (XTE) and Filtek Bulk Fill (BUL) flowable resins and Clinpro Sealant (CLI) ultra-flowable pit and fissure sealant resin were used. 25 samples were tested using ...

The effect of acidic ionic liquid (IL) as a new catalyst on the properties of wood-based panels bonded with urea-glyoxal (UG) resins was investigated. Different levels of N-methyl-2-pyrrolidone hydrogen sulfate ([HNMP] HSO4 (0, 1, 2, 3 wt %)) were added to prepared UG resin. The resin was then used for preparing laboratory particleboard panels. Then, the properties of the prepared panels were e...

Sulfur chemical structures present in crude oil products such as petroleum asphaltenes, resins, and maltenes obtained from two different oils have been determined using X-ray absorption nearedge structure (XANES) spectroscopy. Maltenes are pentane soluble portions, resins are pentane insoluble and heptane soluble portions, and asphaltenes are heptane insoluble portions of crude oil. The sulfur ...

Polylactic acid (PLA) was melt-blended with epoxy resin to study the effects of reaction on mechanical and thermal properties PLA. The addition 0.5% (wt/wt) PLA increased maximum tensile strength (57.5 MPa) 67 MPa, whereas 20% improved elongation at break 12%, due crosslinking caused by reaction. morphology PLA/epoxy blends showed nanoparticle dispersion in matrix that presented a smooth fractu...

reduced adsorption of NO3–N and NH4–N by anionic and cationic resins, respectively. Kjonaas (1999) also Ion exchange resins have widely been used in mineralization studies observed no detectable effect of freezing on resin staof organic materials. However, the stability of resin (anionic and cationic) under changing physical environmental conditions is not bility. Lehmann et al. (2001) have obs...

Resin based three-dimensional (3D) printing is popular for many applications including replicating geologic porous media samples. This study the first to explore resin-based 3D of reactive media. Here, digital light projection (DLP) sandstone replicates was performed using photosensitive resin mixed with calcite varying amounts. Printed samples were imaged in X-ray micro computed tomography (μC...

We examine the feasibility and functionality of hydrophilic modifications to a borate glass reinforced resin composite; with the objective of meeting and maintaining therapeutic thresholds for Sr release over time, as a potential method of incorporating antiosteoporotic therapy into a vertebroplasty material. Fifteen composites were formulated with the hydrophilic agent hydroxyl ethyl methacryl...

BACKGROUND Food preservation is basically done to preserve the natural characteristics and appearance of the food and to increase the shelf life of food. Food preservatives in use are natural, chemical and artificial. Keeping in mind the adverse effects of synthetic food preservatives, there is a need to identify natural food preservatives. The aims of this study were to evaluate in vitro antio...