No abstract

Reduction of plastic wastes in the environment and solving the energy demands from renewable sources are two important challenging tasks of this century. Modern day lives are highly entangled with polymers, however handling the huge wastes from plastics is also a serious concern. Translating the plastic wastes to useful products such as graphene can be an alternative for nonbiodegradable polymer wastes. Efficient energy storage devices, for instance, batteries are required for storing the renewable energies. With the aim of regulating these issues, we report, for the first time, the preparation of high energy cathode materials from the nanocomposites (NCs) having polyaniline (PANI), waste‐derived graphene (WDG) derived from plastic waste and sulfur (S) for Li–S battery applications. We compare the electrochemical properties of cathodes derived from WDG/S and WDG/PANI/S in Li–S batteries. The specific discharge capacity of WDG/PANI/S at 0.1 C was obtained to be 880 mAhg−1 normalized to sulfur mass at 1st cycle, 472 mAhg−1 at 100th cycle, and 400 mAhg−1 at 160th cycle. The rate capability is also found to be good at C‐rates less than 0.5 C. We found that WDG/PANI/S showed decent electrochemical properties when compared with the reference sample, WDG/S at similar sulfur loading without PANI modification.

In the field of forensic medicine, estimating time since death plays an important role in helping the investigative organizations unravel the mystery of crime. Presently, many less reliable subjective parameters are being used to measure it, necessitating the need to have more specific and objective parameters. This cross-sectional comparative study was conducted at the Department of Forensic Medicine and Toxicology, All India Institute of Medical Sciences, Bhopal, India on 60 deceased bodies to determine the correlation between known time since death and biochemical parameters in the synovial fluid specifically sodium, potassium, lactate, and total proteins, analyzed using random access fully automated chemical analyzer (Beckman Coulter Au680) followed by estimation of correlation using Spearman correlation test. All the biochemical parameters that were tested in the synovial fluid except for sodium showed a significant correlation. The potassium and lactate showed a significant positive correlation (P < 0.001), and on the contrary, the total protein level showed a significant negative correlation with time since death (P < 0.001). This study shows usefulness of these markers in estimating the time since death. The smaller sample size and the unavailability of the results of effect of cold storage on these parameters necessitate the need of further similar studies to uncover the real practical application.