pp 1-3 April 2000 Editorial

Editorial / Associate Editor’s Column

Rajaram Nityananda

pp 4-5 April 2000 Table of Contents

Table of Contents

pp 6-18 April 2000 Series Article

Photodynamic Therapy (PDT) - Basic Principles

Bhaskar G Maiya

pp 19-27 April 2000 Series Article

Statistical Computing - Technique of Statistical Simulation

Sudhakar Kunte

pp 28-36 April 2000 General Article

The EPR Paradox: Einstein Scrutinises Quantum Mechanics

Arvind

pp 37-45 April 2000 General Article

Critical Opalescence

E S Raja Gopal

pp 46-51 April 2000 General Article

Bose–Einstein Condensation - Birds of a Feather Flock Together

Rajaram Nityananda

pp 52-61 April 2000 General Article

Chaotic Dynamics on the Real Line - Periodic Behaviour and the Bifurcation Diagram

S Natarajan

pp 62-73 April 2000 General Article

The Origin and Resolution of Conflicts in Animal Societies - The Case of the Bees and the Birds

Raghavendra Gadagkar

pp 74-84 April 2000 General Article

Mitochondria can Power Cells to Life and Death - Role of Mitochondria in Apoptosis

Nand K Sah Tarvinder K Taneja Seyed E Hasnain

pp 85-90 April 2000 General Article

A Curve for all Reasons - The Rectangular Hyperbola in Biology

T Ramakrishna Rao

pp 91-96 April 2000 General Article

Discrete–Time Systems - Where does the Vacillating Mathematician go?

A Ramakalyan P Kavitha S Harini Vijayalakshmi

pp 97-107 April 2000 Classroom

Project Lifescape – Freshwater Fishes: Catfishes

R J Ranjit Daniels

pp 108-110 April 2000 Book Review

Ideas and Opinions

C S Yogananda

pp 111-120 April 2000 Reflections

Albert Einstein: A Biographical Sketch

Maja Winteler-Einstein

pp 121-122 April 2000 Classics

Letter by Einstein to Arnold Sommerfeld

pp 125-125 April 2000 Featured Scientist

Albert Einstein (1879-1955)