Despite great efforts to develop a vaccine against human immunodeficiency virus (HIV), which causes AIDS if untreated, no approved HIV is available date. A promising class of vaccines are virus-like particles (VLPs), were shown be very effective for the prevention other diseases. In this study, production HI-VLPs using different 293F cell lines, followed by three-step purification HI-VLPs, was ...

in this study, total factor productivity(tfp) growth of sugar beet in iran during 1989-1990 through 2007-2008 was analyzed, using nonparametric malmquist approach. so, amounts of inputs usage including seeds, fertilizers, insecticides, herbicides, labor, water use and acreage in one hand and output of sugar beet production on the hand were taken into account. results showed that sugar beet prod...