Page 46 - final Practical handout PG 303-Cogno-2- 2024-2025
P. 46

root        Ginger rhizome   Curcuma rhizome               Galangal

‫الزنجبيل درن‬P‫ة‬h‫م‬a‫و‬r‫ز‬m‫ري‬acognosy-2 (PG 3(0T3)urmeric)       rhizome

                             ‫ريزومة الكركم‬                 / ‫ريزومة القولنجان‬

                                                           ‫خولنجان‬

ot has a    • Hand with      • Finger shape.               • Branched
pe.           fingers        • Yellow color.                 rhizome.
e has
rrows       • Buff or light                                • Reddish brown
 s.           brown color.                                   color.
r.
            Pungency is
 (due to    destroyed with
ty (due to  alkali
.

                             (1) Few drops of mixture of
                             (Conc. H₂SO₄/ 95%
                             alcohol), then sprinkle a
                             small amount of powder,
                             particles of curcuma turn
                             red.
                             (2) Powder/ether, extract
                             with CHCl₃, dry on filter
                             paper, yellow stain, by

                             treatment with hot saturated
                             boric acid solution, an

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