locant. (chemistry). The portion of a chemical name, usually a number or a letter, that designates the position of an atom or group of atoms in a formula unit. 1  Facebook. 2  Twitter.
A back-to-back cargo movement is generally understood as the transfer of loose goods from one truck to another---in its literal form, positioning two trucks with their backs to one another. Primitive variants involve labor-intensive handling and placement of cargo on the ground during the transfer.t is, however, the hallmark of cargo transfer at every crossing between Israel and the Palestinian areas as well as at a number of checkpoints inside the West Bank. Even the new border terminals under development by the Government of Israel envision variants of this type of back to back system.
Bulk transport is the movement of substances across a membrane within a small vacuole (a temporary vacuole formed for this process - much smaller than the permanent vacuoles of plant cells). It is the means by which larger molecules and particles move through membranes enclosed by vesicles formed by sections of cell membrane.