Acacia senegal (gum)

From AHPA Botanical Identity References Compendium
(Difference between revisions)
Jump to: navigation, search
(add references tag)
Line 1: Line 1:
−
=Introduction=
+
=Nomenclature=
−
=Macroscopic Entries=
+
=Botanical Voucher Specimen=
 +
=Organoleptic Characteristics=
 +
=Macroscopic Descriptions=
 
{{Macroscopy | source=United States Dispensatory (1918)
 
{{Macroscopy | source=United States Dispensatory (1918)
 
| description=The most important of the gum-yielding Acacias is the official ''A. Senegal'' Willd.
 
| description=The most important of the gum-yielding Acacias is the official ''A. Senegal'' Willd.
Line 9: Line 11:
 
}}
 
}}
  
−
=Microscopic Entries=
+
=Microscopic Characteristics=
 
{{Microscopy | source=Schneider, A. (1921) The Microanalysis of Powdered Vegetable Drugs, 2nd ed.
 
{{Microscopy | source=Schneider, A. (1921) The Microanalysis of Powdered Vegetable Drugs, 2nd ed.
 
             | mainimage=Microanalysis_powdered_vegetable_p_202_google_ver_acacia.png‎
 
             | mainimage=Microanalysis_powdered_vegetable_p_202_google_ver_acacia.png‎
Line 21: Line 23:
 
             | adulterants=India gum is the most common adulterant of gum acacia.  Old gum acacia turns yellowish amber color and increases in brittleness. The impurities are generally negligable and should not exceed 1 per cent.
 
             | adulterants=India gum is the most common adulterant of gum acacia.  Old gum acacia turns yellowish amber color and increases in brittleness. The impurities are generally negligable and should not exceed 1 per cent.
 
             | }}
 
             | }}
−
=HPTLC Entries=
+
=High Performance Thin Layer Chromatographic Identification=
 
=Other Points of Interest=
 
=Other Points of Interest=
 
<references />
 
<references />

Revision as of 16:23, 22 January 2014

Contents

Nomenclature

Botanical Voucher Specimen

Organoleptic Characteristics

Macroscopic Descriptions

The most important of the gum-yielding Acacias is the official A. Senegal Willd.

This is a small tree rarely exceeding a height of 6 m., with a grayish bark, the inner layers of which are strongly fibrous, bipinnate leaves, dense spikes of small yellow flowers longer than the leaves, and broad pods containing 5 or 6 seeds.

The gum of the acacias exudes spontaneously from the bark, and hardens on exposure; but incisions are sometimes made in order to facilitate the exudation. The gum is said also to be found immediately under the bark, where it is sometimes collected in regular cavities. It is formed within the plant by metamorphosis of the cells of the inner bark. The tissues involved are chiefly those of the sieve and the cambiform cells. While to some extent it is a natural change, yet it is usually looked upon as being in part a pathological production, as gummosus develops more largely upon the wounding of the trees.

Source: United States Dispensatory (1918) [1]

Microscopic Characteristics

Acacia senecal dried brittle glassy gummy exudation. AKA Gum Arabic.Shows no structure under the microscope. Reduce some of the gum to fine powder and dissolve about five grams in 10 parts water; centrifuge for a short time and examine the sediment for impurities which are usually present, consisting of trace of starch, some dirt and bits of vegetable tissue.

Source: Schneider, A. (1921) The Microanalysis of Powdered Vegetable Drugs, 2nd ed. [2]
Microanalysis powdered vegetable p 202 google ver acacia.png


High Performance Thin Layer Chromatographic Identification

Other Points of Interest

  1. ↑ United States Dispensatory (1918)
  2. ↑ Schneider, A. (1921) The Microanalysis of Powdered Vegetable Drugs, 2nd ed.
Retrieved from "http://sharepointucs.houstontx.gov/index.php?title=Acacia_senegal_(gum)&oldid=4556"
Personal tools
MediaWiki Appliance - Powered by TurnKey Linux