Dengue virus infection in hematopoietic stem cell transplant recipients: A case series and comparative literature review from dengue endemic region.

This case series describes the wide spectrum of clinical presentation, laboratory findings, and morbidity/mortality associated with dengue fever in hematopoietic stem cell transplant recipients, treated in a dengue endemic region. The risk of acquiring viral infections increases manifold after transplant due to the severely immunocompromised state amid conditioning toxicity and immunosuppressive therapy. The classical warning signs of dengue viremia are often masked in posttransplant patients, leading to a missed diagnosis of dengue and grave consequences observed in some of the patients. Accurate and timely diagnosis of dengue fever especially in dengue prevalent areas can prevent the unwarranted complications and reduce the morbidity and mortality associated with dengue in allogeneic/autologous transplant recipients.

Towards a Highly Efficient ZnO Based Nanogenerator.

A nanogenerator (NG) is an energy harvester device that converts mechanical energy into electrical energy on a small scale by relying on physical changes. Piezoelectric semiconductor materials play a key role in producing high output power in piezoelectric nanogenerator. Low cost, reliability, deformation, and electrical and thermal properties are the main criteria for an excellent device. Typically, there are several main types of piezoelectric materials, zinc oxide (ZnO) nanorods, barium titanate (BaTiO3) and lead zirconate titanate (PZT). Among those candidate, ZnO nanorods have shown high performance features due to their unique characteristics, such as having a wide-bandgap semiconductor energy of 3.3 eV and the ability to produce more ordered and uniform structures. In addition, ZnO nanorods have generated considerable output power, mainly due to their elastic nanostructure, mechanical stability and appropriate bandgap. Apart from that, doping the ZnO nanorods and adding doping impurities into the bulk ZnO nanorods are shown to have an influence on device performance. Based on findings, Ni-doped ZnO nanorods are found to have higher output power and surface area compared to other doped. This paper discusses several techniques for the synthesis growth of ZnO nanorods. Findings show that the hydrothermal method is the most commonly used technique due to its low cost and straightforward process. This paper reveals that the growth of ZnO nanorods using the hydrothermal method has achieved a high power density of 9 µWcm-2.