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Naphthaquinones from some Boraginaceous Taxa-A Chemical Review
Khatoon, Sayyada,Mehrotra, Shanta The Korean Society of Pharmacognosy 1996 Natural Product Sciences Vol.2 No.2
The naphthaquinones-isohexenylnaphthazarins-are mostly found in the ceratenchymatous cells of the roots of some boraginaceous taxa. A total of 34 naphthazarins and their derivatives have been isolated from these taxa till date.
Pharmacognostical Evaluation of Gymnema sylvestre R. Br.
Adarsh Kumar Agnihotri,Sayyada Khatoon,Manisha Agarwal,Ajay Kumar Singh Rawat,Shanta Mehrotra,Palpu Pushpangadan 한국생약학회 2004 Natural Product Sciences Vol.10 No.4
In India, Gymnema sylvestre due to the unique property of the plant to antagonize the sweet taste is known as ‘Gur-mar’. It has several ethnomedicinal values as various tribals/traditional communities and rural peoples of India find diverse medicinal uses viz. antidiabetic, stomachic, diuretic, and is useful in cough and throat troubles. Besides, it has strong effect on reducing blood sugar. The present communication deals with the detailed pharmacognostical evaluation of the aerial parts of G. sylvestre collected from three places of the country- Varanasi (U.P), Panchmarhi (M.P), Salem (Tami Nadu) and commercial sample procured from local market. The botanical and physico-chemical parameters of all the samples were quite similar though little variations were observed in foaming index, alcohol and water soluble extractives of local sample. The microscopic characteristics of the drug are horse shoe shaped petiole with 3 amphicribal vascular bundles, sieve tubes well developed; anomocytic stomata only on the abaxial surface of the leaf, the fan shapedamphicribal vascular bundle, presence of intraxylary phloem. The TLC fingerprint profile of all the samples was more or less similar only the quantity of some of the compounds varied.
Pharmacognostic Evaluation of the Root of Berberis aristata DC.
Sharad Kumar Srivastava,Sayyada Khatoon,Ajay Kumar Singh Rawat,Shanta Mehrotra,Palpu Pushpangadan 한국생약학회 2001 Natural Product Sciences Vol.7 No.4
Berberis aristata (family Berberidaceae), known as `Daruharidra` in Ayurvedic system of medicine, is an important medicinal plant used extensively for treating a variety of ailments in various systems of indigenous medicine. Being an important medicinal plant it is being adulterated and in the absence of any pharmacognostic information it is very difficult to check the adulteration. The present study was therefore, carried out to provide the requisite pharmacognostic details. Morphological, anatomical and phytochemical aspects of B. aristata were carried out. Diagnostic features of B. aristata root were identified and characterized from the above investigations and presented in the present communication. Some of the diagnostic features of the root drug noted from the anatomical study are patches of pericyclic fibre, pitted sclerieds, berberine containing cells and heterocyclic medullary rays. HPTLC analysis showed three distinct bands of which berberine was identified as the major constituents. The R_f value of other bands was also calculated.