abstractthe purpose of this study was to investigate the controllable operating parameters influence, including ph, solid content, collector, co-collector, and depressant dose, and conditioning time, on apatite flotation kinetics. four first order flotation kinetic models are tested on batch flotation time-recovery profiles. the results of batch flotation tests and the fitting of first-order ki...

• Estimating the expansion of granular activated carbon (GAC) in water is complex. The incipient porosity GAC much higher compared to rigid particles. Combining fluidisation and characterisation experiments enables modelling. modelling complex but possible. Granular filtration an important unit operation drinking treatment. widely used for its adsorption capabilities as a barrier undesired orga...

Feed technology has advanced in the past two decades. However, NRC (1994) vitamin requirements for the non-ruminant species have not changed to any great extent due to limited research in this area. Conditioning temperatures have increased to reduce microbial contamination and improve pellet quality and/or production rate. From a practical standpoint, vitamin activity may be decreased in finish...

spending costs in construction of road pavements has turned this subject into one of the significant points in transportation infrastructure of countries. concrete slabs consider as a paving method with ability of reducing the rehabilitation needs. therefore, to manage costs and optimize the thickness of concrete pavements, recognizing the amount of determinative factors’ influence will be requ...

in this paper, moment-curvature behavior and ductility of prestressed concrete members based on nonlinear analysis is investigated. influence of various design parameters on ductility of flexural members is determined according to appropriate materials models for stress-strain curves of concrete, prestressing steel and conventional reinforcements. parameters studied include reinforcing index (ω...

objective: this study aimed to evaluate the effect of seasonal variability on the assisted reproductive technique (art) success rate. materials and methods: this study was a descriptive – analytical survey performed on 91 infertile women undergoing  intracytoplasmic sperm injection – embryo transfer (icsi-et) in different seasons. the patients aged less than 35 years old and had normal lh/fsh r...