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Abstract  

The study deals with the effect of chemical and physical modifications on thermal properties and solubility properties of films based on amaranth flour starch–protein hydrolysate. Biodegradable and edible films were prepared by casting a 25% (w/w) solution of hydrolysate containing 20% glycerol and various additions of dialdehyde starch (0, 1 and 5%). After thermal exposure of films at 65 and 95 °C (for 6 and 48 h), thermal properties of films were studied employing differential scanning calorimetry and thermogravimetric analysis. Film solubility tests were performed in an aqueous environment at 25 °C. Chemical and physical modifications of films markedly affect their thermal properties and solubility.

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Abstract  

The paper describes the radiochemical and chemical analyses of industrial graphite scraps showing high radioactivity levels. The uranium concentration in some graphite scraps was very high (up to l kBq/g, 7.7%w/w) and its distribution greatly heterogeneus. Some uranium solubility tests carried out on the graphite scraps showed that 60–70% of the element could be dissolved with a buffer solution at pH 4 and that complete dissolution could be obtained by leaching with conc. HNO3 . By taking into account these results it can be concluded that the radioactive contaminant consists of uranium chemically purified and isotopically treated.

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. Thermal study and solubility tests of films based on amaranth flour starch–protein hydrolysate . J Therm Anal Calorim . 2009 ; 98 : 299 – 307 . 10.1007/s10973-009-0106-4 . 17. Sahin , NO

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electrode. The PVA/β-CD nanofibers were continuously collected until 2.5 h. After the electrospinning, nanofibers were exposed to HCl fumes for 1 min to convert into crosslinked PVA/β-CD nanofibers. ‘Water solubility test’ was used to check nanofiber

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Journal of Thermal Analysis and Calorimetry
Authors: S. C. Mojumdar, G. Madhurambal, M. Mariappan, and B. Ravindran

were synthesized, grown by slow evaporation technique at room temperature and studied by thermodynamic, microscopy, optical analysis and solubility test. Experimental procedure There are several methods of measuring the

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Acta Microbiologica et Immunologica Hungarica
Authors: Suncica Popovic, Mirjana Hadnadjev, Ina Gajic, Vera Mijac, Dusan Kekic, Aleksandra Smitran, Lazar Ranin, and Natasa Opavski

confirmed in our laboratory by optochin test, latex agglutination with the Slidex pneumo-kit (bioMérieux, France), bile solubility test, and PCR for the lytA gene. Serotyping was done by the capsular swelling test (Quellung reaction) using pool antisera

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% reaches only 10.15 by using the thermal stabilizer II. This may be due to the good stabilizing effect of investigated compounds I and II that decreases the extent of chain scission of PVC. The solubility test of thermally degraded PVC exhibits the absence

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