Celluloid in museum collections is very unstable; therefore, heritage professionals carry out research studies dedicated to understanding its decay and prolonging lifetime. This paper addresses the need compare select suitable analytical methods for that purpose. Thermogravimetric analysis coupled with Fourier transform infrared spectroscopy, evolved gas analysis–mass spectrometry, double shot ...

Thermoplastic proteins can be prepared by using a suitable plasticizer and by using a proper combination of mechanical shear and heat. The amount of plasticizer and the processing conditions leads to materials with different chemical and physical properties which can be optimized to produce films, fibers and foams. The effect of type and amount of plasticizer, and the effect of processing condi...

background: low molecular weight heparin (lmwh) is used for the treatment and prevention of coagulative disorders. few patients receiving therapeutic doses of lmwh develop major hemorrhage. currently there are few reports in the literature on acute overdose on adults.  in this study, clinical profile, treatment and outcome of 21 patients who acutely overdosed enoxaparin are described. methods: ...

in this study, damar batu (db) − a novel biomaterial− is evaluated for its potential application in pharmaceutical coating. db is a whitish to yellowish resin, characterized initially in terms of solubility, acid value, molecular weight (mw), polydispersity index (mw/mn) and glass transition temperature (tg). neat plasticized films of db are investigated for mechanical, water vapor transmission...

Abstract Background European chemicals management aims to protect human health and the environment from legacy emerging contaminants. The plasticizer market changed in response restriction of low molecular weight (LMW) phthalate plasticizers such as Di (2-ethylhexyl) (DEHP) due their hazardous properties. We investigated patterns trends 19 regulated house dust German homes suspended particulate...

the degradation of poly (vinyl pyrrolidone) (pvp) by means of ultrasound irradiation and itscombination with heterogenous photocatalysis (tio2 nanoparticles) was investigated. emphasiswas given on the effect of additive on degradation rate constants. 24 khz of ultrasoundirradiation was provided by a sonicator, while an ultraviolet source of 30 w was used for uvirradiation. to increase the effic...

in the present work, a titanium-based ziegler-natta catalyst was employed to synthesize ultra molecular weight polyethylene in a slurry medium. the effect of different parameters such as ethylene pressure, temperature, catalyst composition, and hydrogen pressure was studied. as the results indicate, increasing either [al]/[ti] ratio or temperature causes polymerization rate to go through a maxi...