Direct methanol fuel cells (DMFCs) are considered to be one of the most promising candidates for portable and stationary applications in the view of their advantages such as high energy density, easy manipulation, high efficiency and they operate with liquid fuel which could be used without requiring any fuel-processing units. Electrolyte membrane of DMFC plays a key role as a proton conductor ...

Pharmaceutical formulation development involves various components in addition to the active pharmaceutical ingredients. In recent years, excipient development is become core area of research in pharmaceutical drug delivery because it influences the formulation development and drug delivery process in various ways. Biopolymers are choice of research as excipient because of its low toxicity, bio...

Exploiting the emulsification properties of low cost, environmentally safe Gum Arabic we demonstrate a high yield process to produce a few layer graphene with a low defect ratio, maintaining the pristine graphite structure. In addition, we demonstrate the need for and efficacy of an acid hydrolysis treatment to remove the polymer residues to produce 100% pure graphene. The scalable process give...

Double-stranded (ds) complexes of poly(C) with poly(G) and poly(G,I) were studied using differential pulse polarography (DPP) and differential pulse voltammetry at a pyrolytic graphite electrode (DPV). The complex formed by copolymer was found to be DPP inactive. On the other hand, poly(G).poly(C) yielded a small DPP peak corresponding to single-stranded (ss) poly(C). It was suggested that ss p...

Abstract The newly engineered functional systems of nanotechnology implemented in food packaging minimize product loss by extending shelf life. incorporation nanostructured materials into formulations enhanced the existing characteristics increasing specific surface area these biopolymers. Natural biopolymers were regarded as greener, more sustainable, and environmentally friendly materials. St...

The present work focuses on understanding and control of biopolymer fouling in ultrafiltration of a typical surface water and nearby secondary effluent for direct and indirect portable use. Characterization results show that both kinds of biopolymers are of similar molecular weight. Longer than one year water quality monitoring results show that the C/N ratio in the secondary effluent biopolyme...

Observation of a chemically resistant organic residue from maize crop soils by transmission electron microscopy reveals the occurrence of thin laminae with 10-50 nm thickness, similar to resistant, highly aliphatic biopolymers found in kerogens and microbes. This discovery shows evidence for a novel and alternative mode of formation of soil organic matter by selective preservation of resistant ...

Background :Gelatin and chitosan are known as biodegradable and biocompatible biopolymers.These biopolymers have recently receivedincreasingly more attention for tissueengineering.The aim of this study was to evaluate the toxicity effects of gelatin-chitosan film on bone marrow stromal cell(BMSCs) culture in rat.                                                  Materials & Methods: First, gel...

Background Gelatin and chitosan are known as biodegradable and biocompatible biopolymers.These biopolymers have recently receivedincreasingly more attention for tissueengineering.The aim of this study was to evaluate the toxicity effects of gelatin-chitosan film on bone marrow stromal cell(BMSCs) culture in rat.                                                  Material & Methods: First, gelat...

The chemical contamination of water from a wide range of toxic derivatives, in particular heavy metals, aromatic molecules and dyes, is a serious environmental problem owing to their potential human toxicity. Therefore, there is a need to develop technologies that can remove toxic pollutants found in wastewaters. Among all the treatments proposed, adsorption is one of the more popular methods f...