Evaluation of the renal calculi compositions

Design and characterization of sustainable bio‐composites from waste chicken feather keratin and thermoplastic polyurethane

“…The first is a minor mass loss of approximately 4% over the range of $30 to $2308C. This loss is likely due to the fact that water is lost in this temperature range and this water could come from the TPU or the protein [23,24]. Herrera et al [25] also reported that carbon loss was observed during this phase of degradation.…”

“…In the TPU-CFF bio-composites this large mass loss was likely to be the result of several complex processes that include dehydration of the protein structures together with de-polymerization and decomposition of urethane, polyether and of amino acid derived structures [7,[27][28][29]. This stage is associated with the destruction of disulfide bonds and the elimination of H 2 S originating from the amino acid cysteine, which is a major keratin component [23,24]. Moreover, this step involves vaporization of several components of the polyurethane [26,30], resulting in the formation of isocyanate, alcohols, primary or secondary amines, olefins, and more carbon dioxide than the previous stage [25,26,31].…”

May a comprehensive mineralogical study of a jackstone calculus and some other human bladder stones unveil health and environmental implications?

“…A discrimination between anhydrous and hydrated phases occurring in the aggregates forming urinary stones is easily performed by following their thermal transformations recorded in STA analysis [5,23,51,[58][59][60][61][62][63][64]. The TG curve of acid uric (samples KS011B, KS020B and KS023B)…”