According to the manufacturer (Kodak pathe) of the LR-115 Type 2 films, which are widely used in environmental radioactivity studies, the exposed films should be etched in 10% solution of NaOH, while the temperature of the etching solution is to be kept at 60C. The optimum time of etching depends on different conditions; like geometry of the bath, temperature etc. To determine the optimal etchi...

It is well established that the bulk etch rates for solid state nuclear track detectors are a ected by the concentration and the temperature of the etchant. Recently, we found that the bulk etch rate for the LR 115 detector to be a ected by stirring during etching. In the present work, the e ects of stirring on the bulk etch rate of the CR-39 detector is investigated. One set of sample was etch...

Abstract: Biodiesel is produced through transesterification of vegetable oils or animal fats. It significantly depends on many reaction parameters among which temperature and stirring are most important. In transesterification, reaction rates follow Arrhenius equation (i.e. function of temperature). Also, effect of stirring effect on reaction rate can be described as Boltzmann sigmoid form (as ...

The pilot-scale study on a sludge recycling enhanced coagulation–ultrafiltration (UF) process for surface water treatment is investigated in this paper. The impact of the sludge recycling ratio and coagulation stirring strategy on removal, sedimentation efficiency, and membrane fouling control was studied in this work. Sludge recycling ratios of 0%, 5%, 10%, 15%, and 20% were applied, and the o...

The suspension of different nanoparticles into various conventional thermal fluids to synthesize nanofluids has been proven possess superior thermal, optical, tribological, and convective properties, the heat transfer performance over fluids. This task appears trivial but is complicated significant nanofluid synthesis its subsequent utilization in diverse applications. stability mono hybrid sig...

Apigenin (API) has many biological activities, but its poor solubility limits clinical application. In this research, API nanoparticles were prepared by the liquid antisolvent precipitation (LAP) technique, which effectively improved and bioavailability of API. Through design a single-factor test, effects type dosage surfactants, concentration, to solvent volume ratio, speed time stirring, temp...

pyrolysis of low density polyethylene (ldpe) by equilibrium fluid catalytic cracking (fcc) was studied in a stirred reactor under different process parameters. in this work, the effect of process parameters such as degradation temperature (420-510°c), catalyst/polymer ratio (0-60%), carrier gas type (h2, n2, ethylene, propylene, ar and he), residence time and agitator speed (0-300 rpm) on the c...