With prevalent attacks in communication, sharing a secret between communicating parties is an ongoing challenge. Moreover, it is important to integrate quantum solutions with classical secret sharing schemes with low computational cost for the real world use. This paper proposes a novel hybrid threshold adaptable quantum secret sharing scheme, using an m-bonacci orbital angular momentum (OAM) pump, Lagrange interpolation polynomials, and reverse Huffman-Fibonacci-tree coding. To be exact, we employ entangled states prepared by m -bonacci sequences to detect eavesdropping. Meanwhile, we encode m -bonacci sequences in Lagrange interpolation polynomials to generate the shares of a secret with reverse Huffman-Fibonacci-tree coding. The advantages of the proposed scheme is that it can detect eavesdropping without joint quantum operations, and permits secret sharing for an arbitrary but no less than threshold-value number of classical participants with much lower bandwidth. Also, in comparison with existing quantum secret sharing schemes, it still works when there are dynamic changes, such as the unavailability of some quantum channel, the arrival of new participants and the departure of participants. Finally, we provide security analysis of the new hybrid quantum secret sharing scheme and discuss its useful features for modern applications.

Hybrid threshold adaptable quantum secret sharing scheme with reverse Huffman-Fibonacci-tree coding

Clays have numerous applications in a variety of applications including engineering, medical and civil areas. The wide applicability of clays is attributed to their useful physico-mechanical as well as biomedical applications, since they are readily available, nontoxic to human body and environment, low cost and having kneading, swelling, adsorption of properties for metal ions. Industrial sectors in different fields are greatly dependent on the usage of different clays, but the cracks or defects or damaged areas present in clays restrict their practical applications. In order to overcome these problems, various polymeric materials have been developed through different strategies to heal the cracks or repair the damaged areas of clays, and improve their properties and potential usage in various applications. This review will address several aspects such as preparation, structure–property relationships, properties of different types of clays and self-healing polymers, healing process of cracks in clays using polymers, crack healing mechanism, test methods of healing efficiency, properties (e.g. structure, hydraulic conductivity, swelling nature, mechanical and rheology) of clays before and after healing of cracks, and their applications.

Self-healing polymers: Synthesis methods and applications

Oxidized chitosan modified electrospun scaffolds for controllable release of acyclovir

Recent advances in celluloses and their hybrids for stimuli-responsive drug delivery.

Multidrug-loaded electrospun micro/nanofibrous membranes: Fabrication strategies, release behaviors and applications in regenerative medicine.

This study reports application of electrospinning for controlled drug delivery by using polyurethane monolithic nanofibrous web. The endeavor of this study was to explore the effects on release, antimicrobial activity, and morphological behavior of drug–nanoclay intercalates vis-a-vis direct drug inclusion in the form of nanofibrous structures. Antibiotic drug, tetracycline hydrochloride was incorporated into montmorillonite clay interlayer spacing and then embedded into the synthetic polymeric nanofibrous structures. In vitro release study was conducted to assess the release characteristics. Disk diffusion experiment was organized to observe antimicrobial activities and finally human dermal fibroblast cells were grown on the nanofibrous web to address morphological behavior. The results showed that the nanoclay performed as a better way in the form of sustained drug release carrier. The produced electrospun nanofibrous webs could provide broad spectrum antibacterial activities beneficial for topical applications. The fibroblast cell growth on the nanofibrous web caused proliferation to result a mesh like structure which would certainly have a positive effect on wound healing.

Controlled delivery of tetracycline hydrochloride intercalated into smectite clay using polyurethane nanofibrous membrane for wound healing application

Nanoclay-based drug delivery vehicle has acquired immense recognition owing to its unique physico-chemical properties. In this study, tetracycline hydrochloride (TCH) drug was intercalated into the interlayer gallery of montmorillonite (Mt) clay by a cation exchange process. The intercalated nanocomposites were characterized by Fourier transform infrared spectroscopy, X-ray diffraction, energy dispersive X-ray and thermogravimetric study. It was evident from the characterization that TCH drug was successfully intercalated into the interlayer gallery of Mt clay. These clay-based formulations exhibited antibacterial activity against both Gram-positive and Gram-negative bacteria on analyses via zone inhibition methods. An in-vitro drug release study was performed in phosphate buffer at physiological temperature and interestingly it exhibited sustained and controlled release of TCH from the nanocomposites, after an initial burst-out effect. Overall, this study showed that these nanocomposite materials have immense potential for use in controlled drug delivery strategies for antibacterial treatment.

Kasturi Saha

Papers

Controlled delivery of tetracycline hydrochloride intercalated into smectite clay using polyurethane nanofibrous membrane for wound healing application

Antibactericidal nanoclay-based biomaterial for sustained delivery of tetracycline hydrochloride