Equipment concept design and development plans for microgravity science and applications research on space station: Combustion tunnel, laser diagnostic system, advanced modular furnace, integrated electronics laboratory

Taking advantage of the microgravity environment of space NASA has initiated the preliminary design of a permanently manned space station that will support technological advances in process science and stimulate the development of new and improved materials having applications across the commercial spectrum. Previous studies have been performed to define from the researcher's perspective, the requirements for laboratory equipment to accommodate microgravity experiments on the space station. Functional requirements for the identified experimental apparatus and support equipment were determined. From these hardware requirements, several items were selected for concept designs and subsequent formulation of development plans. This report documents the concept designs and development plans for two items of experiment apparatus - the Combustion Tunnel and the Advanced Modular Furnace, and two items of support equipment the Laser Diagnostic System and the Integrated Electronics Laboratory. For each concept design, key technology developments were identified that are required to enable or enhance the development of the respective hardware

Seasonal variations of bacteria in fish Etroplus suratensis and Etroplus maculatus (Pisces: Cichlidae)

225-228Seasonal variations of bacteria in gills, alimentary canal and reproductive organs of B. suratensis and E. maculatus were studied. Maximum bacterial population was recorded during premonsoon (Jan.-April) and minimum during post monsoon (Sept.-Dec.) seasons. Micrococcus spp were predominant in gills, alimentary canal and reproductive organs of both fish. Selected bacterial cultures were characterized for their physiological activities. Bacterial load in the alimentary canal of both the fish exhibited positive correlation with weight of that organ

A unique approach to Fontan revision in a cyanotic patient

© 2020 Elsevier B.V. Unilateral pulmonary arteriovenous malformations can develop in heterotaxy patients with single ventricle physiology after Kawashima procedure due to preferential flow streaming to one lung. We present the case of a 25 year old patient with this physiology who presented with resting cyanosis to 75% in room air. Our patient underwent a unique revision to reverse the development of arteriovenous malformations with partial resection of her hepatic vein-right pulmonary artery conduit and placement of new conduit connecting hepatic veins to innominate vein which then drained into left-sided superior vena cava, resulting in favorable outcome

Green synthesis of carbon- and silver-modified hierarchical ZnO with excellent solar light driven photocatalytic performance

Superstructured ZnO has been the focus of intensive study due to its promising diverse applications. Here, we demonstrate a facile synthesis of hierarchical ZnO particles hybridized with carbon and silver via a simplified bioprocess using yeast mold broth. Better than traditional microbial and biomimetic methods, our microbe-free strategy offers superior ease-of-preparation with minimal negative environmental impact. The relevant reaction parameters including zinc precursor concentration, broth pH value, and broth content were systemically investigated to control the particle morphologies from solid microrod to mesocrystals of porous microcylinder, nanodisk, nanocone, nanoflower, and microhamburger. Silver nanoparticles were facilely deposited by photoreduction in the broth. The resultant ZnO@C–Ag composite exhibits a significant improvement in the solar light-irradiated photodegradation of methylene blue solution