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- Ratna Pal, Dinesh Kumar Kulshreshtha, Rajesh Prasad Rastogi
- Journal of pharmaceutical sciences
- 1976

Phytochemical investigation of Tithonia tagitiflora has led to isolation of six new germacranolides, tagitinins A, B, C, D, E, AND F, beta-sitosterol, and its beta-D-glucoside. Among these, tagitinin F possesses antileukemic activity.

- Sayani Bera, Ratna Pal
- 2016

1 Background The purpose of this note is to study the Fatou–Julia dichotomy, not for the iterates of a single holomorphic endomorphism of C , k ≥ 2, but for a family F of such maps. The Fatou set of F will be by definition the largest open set where the family is normal, i.e., given any sequence in F there exists a subsequence which is uniformly convergent… (More)

- Ratna Pal
- 2015

We study some dynamical properties of skew products of Hénon maps of C2 that are fibered over a compact metric space M . The problem reduces to understanding the dynamical behavior of the composition of a pseudorandom sequence of Hénon mappings. In analogy with the dynamics of the iterates of a single Hénon map, it is possible to construct fibered Green… (More)

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