“…5), for RT-CS-NPs. The particle size, is although within the range of optimum particle size for intranasal brain drug delivery as reported (Ahmad et al, 2013[3], 2016[2]), still other parameters were studied in order to optimize our formulation, i.e. TTP concentration, CS concentration, pH and stirring speed in order to obtain small particles, maximum loading with maximum encapsulation efficiency as well as PDI (0.206).…”