23 research outputs found
Experimental and molecular dynamic insights on the thermophysical properties for MWCNT-Phosphonium based eutectic thermal media
Get PDFIn this study, a thermal media is synthesized by mixing hydrogen bond acceptor (HBA) [Methyltriphenylphosphonium bromide (MTPB)] salt with hydrogen bond donor (HBD) [ethylene glycol] at a molar ratio of 1:4. Thereafter the corresponding nanofluid was prepared by dispersing 0.02 wt% Multi-Walled Carbon Nanotube (MWCNT) having a diameter 10–30 nm in the base fluid. Prior to dispersion, the shape and morphology of the MWCNT were ascertained using both Field Emission Scanning Electron Microscope (FESEM) and Field Emission Transmission Electron Microscope (FETEM). The crystallinity and functional groups were investigated by X-ray Powder Diffraction meter (XRD) and Fourier Transform Infrared Spectroscopy (FTIR). The stability of the prepared nanofluid was initially performed using visual observation followed by zeta potential measurements. Thermogravimetric analysis (TGA) was performed to check the stability of nanofluid at a temperature close to 500 °C at a heating rate of 10 °C/min under nitrogen environment. Thermophysical properties such as density, viscosity, thermal conductivity, and specific heat of nanofluid were measured in the temperature range 25–85 °C. It is evident from the experimental data that viscosity and density decrease with an increase in temperature. On the contrary, the specific heat and thermal conductivity of the nanofluid were found to increase with temperature. This is due to the induced Brownian motion of the nanoparticle, which results in higher kinetic energy at high temperature. In the penultimate section, Molecular Dynamic (MD) simulations were performed to compare and validate the results of thermal conductivity of nanofluid. © 2022 Elsevier B.V
Snails on the plate: Edible freshwater molluscs of Northeast India
No full text409-419In many parts of the world, freshwater molluscs are extensively harvested for food and medicine. Northeast India is one
such region where freshwater molluscs are consumed by the tribal and economically impoverished communities. These
molluscs are in high demand as they are a cheap source of protein and provide food security, livelihoods and medicine.
Although there are studies that show the nutritional and mineral value of snails, data on the details of harvest, the number of
species consumed, and traditional knowledge associated with them are lacking. This is the first comprehensive study
documenting the diversity of freshwater molluscs sold, quantity, location of harvest, associated traditional knowledge and
uses among different tribal communities of Northeast India. The information was gathered through market surveys and
informal interaction with the vendors selling molluscs. Eighteen species of freshwater molluscs belonging to five families
and six genera were recorded from our study. DNA barcode analysis using COI marker for the market collected specimens
of Paludomus and Brotia show six species each from these genera. Most edible freshwater molluscs have incorrect
taxonomic status and are Data Deficient or Least Concern. Therefore, it is essential to document for their conservation and
management. We also advocate snail farming for their conservation and the nutritional and food security of the tribal
communities, which will help in the sustainable use of natural resources
A Review of the State of the Art of Generators and Power Electronics for Wind Energy Conversion Systems
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A review of the state of the art of generators and power electronics for wind energy conversion systems
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