background: development of safe radioprotector is a challenging task. in this study radioprotective effect of sucrose has been demonstrated in calf thymus dna (ctdna). sucrose is a free radical scavenger and also acts as osmolyte and therefore can influence the water activity around dna and effects of radiation on dna. hoechst 33258 was used to probe the possible alteration in physicochemical p...

nanostructures have considerably higher surface areas than their bulk counterparts; thereforesurfaces often play important, sometimes even dominant, roles in the nanostructure properties. thenanocrystalline and nanotubes have low band gaps and high carrier mobility, thus offeringappealing potential as absorption gas. interaction between methanol molecules and carbonnanotube is investigated usin...

the present work deals with the synthesis and characterization of cds nanoparticles with good thermal stability and optical properties by a novel and simple synthetic route. the nanoparticles were synthesized via chemical precipitation method in a single reaction vessel under ambient conditions. the prepared cds nanoparticles were compared with the bulk cds. the optical properties were determin...

Predicting the effective elastic properties of carbon nanotube-reinforced nanocomposites is of great interest to many structural designers and engineers for improving material and configuration design in recent years. In this paper, a finite element model of a CNT composite has been developed using the Representative volume element (RVE) to evaluate the effective material properties of nanocomp...

This account presents an overview of our achievements in structural and chemical understanding of endohedral metallofullerenes (EMFs), a new class of metal-carbon hybrid materials formed by encapsulation of metals inside fullerene cavities. Structural determination of EMFs is of fundamental importance for understanding their intrinsic properties and the formation mechanism, and for broadening t...

In Markov models of sequential decision processes, one is often interested in showing that the value function is monotonic, convex, and/or supermodular in the state variables. These kinds of results can be used to develop a qualitative understanding of the model and characterize how the results will change with changes in model parameters. In this paper we present several fundamental results fo...

This paper studies the mapping g → g 2 (mod p) by showing that it inherits its structure from the mapping x → x (mod ordp(g)). We first explore the context in which this mapping is important; specifically, we consider the Diffie-Hellman protocol, Diffie-Hellman problem, and the various problems that have spawned from these including the discrete logarithm and square exponent problems. We then d...