The purpose of this study was to evaluate the meiotic behavior and determine the meiotic index and pollen viability of representative plants of the wild species V.goudotiana, V.quercifolia and J.spinosa.Meiotic analysis confirmed that the species are diploid and have 18 chromosomes.Meiosis was partially normal, since some abnormalities, e.g, sticky
A new type of rigid-flexible coupling three degrees of freedom (3-DOF) micro-positioning platform with high positioning accuracy and high bearing capacity is developed, which consists of flexible drive mechanism and rigid platform.The flexible drive mechanism consists of three sets of bookers 2022-04 symmetrical parallel round flexible hinge struct
One of the important principles in the theory of Islamic literature is to look at any social phenomenon through its true location in the context of the social system that is subject to the divine laws that govern the movement of history and civilizational development, and are linked to the laws of God in the universe in general.Its line is drawn in