Chemical fixation: This method is useful for stabilizing biological samples. Chemical substances are utilised tocross link protein molecules with nearby molecules. The most frequently used chemical in this process is glutaraldehyde.Không b? ?nh h??ng b?i các tác ??ng c?a môi tr??ng, b?t k? ?i?u ki?n th?i ti?t có ?? ?m cao, l?nh hay nhi?t ?? ca