Tuesday, June 3, 2014

Aloe vera compounds under the microscope

Aloe vera contains a colorless gel that turn to a deep brown color on air. It is used for many pharmaceutical and cosmetic applications.
This is dried aloe gel under the microscope. After an old instruction (from H.Mölisch: Die Mikrochemie der Pflanze, 1913), I added a drop of glycerin to the juice. After some days small needle like crystals where formed. Molisch described them as aloin (Barbaloin) or a substance similar to aloin.

Aloe   crystals from the gel under the microscope
Crystals from the gel of Aloe vera under the microscope (magnification 200x and polarized light).

Crystals from the gel of Aloe vera under the microscope
Crystals from the gel of Aloe vera under the microscope (magnification 200x and polarized light).

Aloin Crystals under the microscope
Crystals from the gel of Aloe vera under the microscope (magnification 200x and polarized light).

Aloe vera
Aloe vera. 

2 comments:

  1. Unusual pictures and fascinating information too. Thank you for sharing.

    ReplyDelete
  2. What amazing camera work ...they're beautiful .... I used to use the gel often ... Had kind of forgotten about it.

    ReplyDelete

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