Institution
National Physical Laboratory
Facility•London, United Kingdom•
About: National Physical Laboratory is a facility organization based out in London, United Kingdom. It is known for research contribution in the topics: Dielectric & Thin film. The organization has 7615 authors who have published 13327 publications receiving 319381 citations.
Papers published on a yearly basis
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TL;DR: In this article, Fourier transform infrared (FT-IR) and UV-visible spectroscopy were used to optimize TiO2 concentration in chitosan (CS) to develop a sensitive CS/TiO2 bioactive electrode.
81 citations
TL;DR: In this article, the green and sustainable synthesis of zinc oxide quantum dots (QDs) using zinc acetate (precursor) and Eclipta alba leaf extract as a reducing agent was monitored by ultraviolet-visible absorption spectroscopy at wavelength (λmax) 324.
81 citations
81 citations
TL;DR: The results indicate that fireworks during the Diwali festival affected the ambient air quality adversely due to emission and accumulation of TSP, PM10, SO2, and NO2.
Abstract: The variation in air quality was assessed from the ambient concentrations of various air pollutants [total suspended particle (TSP), particulate matter ≤10 μm (PM10), SO2, and NO2] for pre-Diwali, Diwali festival, post-Diwali, and foggy day (October, November, and December), Delhi (India), from 2002 to 2007. The extensive use of fireworks was found to be related to short-term variation in air quality. During the festival, TSP is almost of the same order as compared to the concentration at an industrial site in Delhi in all the years. However, the concentrations of PM10, SO2, and NO2 increased two to six times during the Diwali period when compared to the data reported for an industrial site. Similar trend was observed when the concentrations of pollutants were compared with values obtained for a typical foggy day each year in December. The levels of these pollutants observed during Diwali were found to be higher due to adverse meteorological conditions, i.e., decrease in 24 h average mixing height, temperature, and wind speed. The trend analysis shows that TSP, PM10, NO2, and SO2 concentration increased just before Diwali and reached to a maximum concentration on the day of the festival. The values gradually decreased after the festival. On Diwali day, 24-h values for TSP and PM10 in all the years from 2002 to 2007 and for NO2 in 2004 and 2007 were found to be higher than prescribed limits of National Ambient Air Quality Standards and exceptionally high (3.6 times) for PM10 in 2007. These results indicate that fireworks during the Diwali festival affected the ambient air quality adversely due to emission and accumulation of TSP, PM10, SO2, and NO2.
81 citations
TL;DR: In this paper, a X-ray photoelectron spectroscopy (XPS) depth profile study of the naturally formed native oxide on polycrystalline Ta sample is probed by observing the core level spectra, valence band spectra and work function changes.
81 citations
Authors
Showing all 7655 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Rajesh Kumar | 149 | 4439 | 140830 |
| Akhilesh Pandey | 100 | 529 | 53741 |
| A. S. Bell | 90 | 305 | 61177 |
| David R. Clarke | 90 | 553 | 36039 |
| Praveen Kumar | 88 | 1339 | 35718 |
| Richard C. Thompson | 87 | 380 | 45702 |
| Xin-She Yang | 85 | 444 | 61136 |
| Andrew J. Pollard | 79 | 673 | 26295 |
| Krishnendu Chakrabarty | 79 | 996 | 27583 |
| Vinod Kumar | 77 | 815 | 26882 |
| Bansi D. Malhotra | 75 | 375 | 19419 |
| Matthew Hall | 75 | 827 | 24352 |
| Sanjay K. Srivastava | 73 | 366 | 15587 |
| Michael Jones | 72 | 331 | 18889 |
| Sanjay Singh | 71 | 1133 | 22099 |