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1 淀粉粒、蛋白质、脂肪油的鉴别 淀粉粒多存在于植物的根、茎及种子等器官的薄壁细胞中,如半夏、葛根等。淀粉粒是由造粉体(白色体的一种)积累贮藏淀粉所形成,淀粉积聚时,先从一处开始形成淀粉的核心(脐点),然后环绕核心继续积累。由于日夜贮积有所不同,贮积的数量分布不均匀,以及听堆积的淀粉中含水量的不同,使在脐点的周围显出了轮纹(层纹)。在普通光学显微镜下只要调弱光线,就能见到环状条纹。从化学结构来分别,淀粉加碘化钾碘液:侧链淀粉呈紫色,直链淀粉呈蓝色。 细胞中贮藏的蛋白质,没有淀粉普遍,它与组织原生质的活性蛋白质不同,是化学性稳定的无生命物质。蛋白质一般以糊粉粒的状态存在于细胞的任何部分,如液泡、细胞
1 Identification of Starch Granules, Proteins, and Fat Oils Starch granules are found in the thin-walled cells of plants such as roots, stems and seeds, such as Pinellia ternate and Pueraria lobata. Starch granules are formed by accumulating and storing starch from a powdered body (a type of white body). When starch accumulates, the starch core (umbilical point) begins to form from one place, and then continues to accumulate around the core. Due to the difference in storage between day and night, the uneven distribution of the amount of storage, and the difference in water content in the starch that accumulates, rounding (laminates) appears around the umbilical point. Under the ordinary optical microscope, as long as the light is weakened, you can see the ring stripes. From the chemical structure, potassium iodide solution was added to the starch: the side chain starch was purple and the amylose was blue. The proteins stored in the cells are not common to starch, and unlike the active proteins of the tissue protoplasm, they are chemically stable and inanimate substances. Proteins generally exist in any part of the cell, such as vacuoles, cells, in the form of aleurone.