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55. PM2.5 at a semi-rural site near Beijing, China

Author

Boman, Johan, Langer, M., Pei, X., Guo, S., Pathak, R. K., Gaita, Samuel Mwaniki, Hu, M., Hallquist, M., Boman, Johan, Langer, M., Pei, X., Guo, S., Pathak, R. K., Gaita, Samuel Mwaniki, Hu, M., and Hallquist, M.

Abstract

Breathing clean air is a human right still not accessible to everyone. In most of the world, the air is polluted, which affects both the environment and human health. To investigate the air pollution situation in a semi-rural part of northern China, particles with a diameter below 2.5 & mu;m (PM2.5) were collected in Changping, 40 km northwest of Beijing in May and June 2016. The particles were analyzed for mass, trace elements, and black carbon (BC). The mean PM2.5 mass was 49 & mu;g/m(3), ranging from 3.1 to 266 & mu;g/m(3). S, Cl, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, As, and Pb were determined by Energy Dispersive X-Ray Fluorescence (EDXRF). They constituted 4% of the PM2.5 mass, with BC adding another 3%. Enrichment factor evaluation identified S, Ni, Cu, Zn, As, and Pb as the main anthropogenic contributors to environmental impact. A pollution load index (PLI) of 0.03 showed that the site could not be considered as polluted by the trace elements in PM2.5. Positive matrix factorization (PMF) was used for source apportionment of the PM2.5 content. The PMF analysis reveals that a mixture of mineral dust, fossil fuel combustion, industries, and salts were the main sources of air pollution. The non-carcinogenic and carcinogenic health risks were assessed, and both show a small health risk in the short study period. Following the development of PM2.5 concentrations over time in this part of China shows a decreasing trend of PM2.5 pollution, which is promising for the future.

Published
2023
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60. OC-0760 A randomized trial of concurrent versus sequential Tamoxifen with radiotherapy for breast cancer

Author

Budrukkar, A., primary, Munshi, A., additional, Purandare, N., additional, Puri, S., additional, Lewis, S., additional, Krishnamurthy, R., additional, Jalali, R., additional, Wadasadawala, T., additional, Parmar, V., additional, Nair, N., additional, Gupta, S., additional, Upreti, R., additional, Pathak, R., additional, Rangarajan, V., additional, Sarin, R., additional, and Badwe, R., additional

Published
2023
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61. PO-1149 Factors influencing set up margins for image guided frameless stereotactic radiosurgery

Author

Talukdar, R., primary, Dasgupta, A., additional, Chatterjee, A., additional, Mishra, A., additional, Roy Chowdhury, O., additional, Joshi, K.J., additional, Sutar, A., additional, Sastri Goda, J., additional, Krishnamurthy, R., additional, Wadasadawala, T., additional, Pathak, R., additional, Maitre, P., additional, Murthy, V., additional, Gupta, A., additional, Mittal, P., additional, Chopra, S., additional, Tibdewal, A., additional, Mummudi, N., additional, Singh, V., additional, Shetty, P., additional, Moiyadi, A., additional, Kinhikar, R., additional, Sarin, R., additional, Agarwal, J., additional, and Gupta, T., additional

Published
2023
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68. PM2.5 at a semi‐rural site near Beijing, China.

Author

Boman, J., Langer, M., Pei, X., Guo, S., Pathak, R. K., Gaita, S. M., Hu, M., and Hallquist, M.

Subjects
PARTICULATE matter, TRACE elements, SOOT, TRACE metals, AIR pollution, X-ray fluorescence, MINERAL dusts, MATRIX decomposition, COPPER
Abstract

Breathing clean air is a human right still not accessible to everyone. In most of the world, the air is polluted, which affects both the environment and human health. To investigate the air pollution situation in a semi‐rural part of northern China, particles with a diameter below 2.5 μm (PM2.5) were collected in Changping, 40 km northwest of Beijing in May and June 2016. The particles were analyzed for mass, trace elements, and black carbon (BC). The mean PM2.5 mass was 49 μg/m3, ranging from 3.1 to 266 μg/m3. S, Cl, K, Ca, Ti, V, Mn, Fe, Ni, Cu, Zn, As, and Pb were determined by Energy Dispersive X‐Ray Fluorescence (EDXRF). They constituted 4% of the PM2.5 mass, with BC adding another 3%. Enrichment factor evaluation identified S, Ni, Cu, Zn, As, and Pb as the main anthropogenic contributors to environmental impact. A pollution load index (PLI) of 0.03 showed that the site could not be considered as polluted by the trace elements in PM2.5. Positive matrix factorization (PMF) was used for source apportionment of the PM2.5 content. The PMF analysis reveals that a mixture of mineral dust, fossil fuel combustion, industries, and salts were the main sources of air pollution. The non‐carcinogenic and carcinogenic health risks were assessed, and both show a small health risk in the short study period. Following the development of PM2.5 concentrations over time in this part of China shows a decreasing trend of PM2.5 pollution, which is promising for the future. [ABSTRACT FROM AUTHOR]

Published
2023
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69. Exact Similarity Solution for the Propagation of Spherical Shock Wave in a van der Waals Gas with Azimuthal Magnetic Field, Radiation Heat Flux, Radiation Pressure and Radiation Energy Under Gravitational Field

Author

Nath, G., Dutta, Mrityunjoy, and Pathak, R.

Abstract

We investigated the exact similarity solutions for shock wave propagation in non-ideal gas with radiation heat flux under gravitational field by taking radiation pressure and radiation energy into account in the presence of azimuthal magnetic field for spherical geometry. The solutions are in terms of analytical expressions. Similarity method is used to transform the basic equation from a system of partial differential equation into a system of ordinary differential equations. The system of ODE yields exact solutions for initial magnetic field distributions as power law. Consideration of isothermal approximations, radiation pressure, radiation energy and adiabatic compressibility in gravitating medium into accounts leads to new insights into explosion problem in contrast to earlier model. Finally, the product solution of progressive wave given by Mc. Vittie is used to obtain the exact similarity solution under the consideration that the radiation pressure is not equal to zero and the energy loss due to radiation escape is significant. The Alfven–Mach number effect, the parameter of gravitational effect, the parameter of non-idealness of the gas, the radiation pressure number and the adiabatic exponent gamma of the gas are discussed in detail.

Published
2024
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77. 23P Combination chemotherapy and hormone therapy (CHT) in patients with hormone receptor (HR) positive, HER2 negative metastatic breast cancer (MBC): A single-centre retrospective analysis

Author

Bajaj, K., primary, Vora, D.N., additional, Parab, P., additional, Shaikh, H., additional, Gulia, S., additional, Rath, S., additional, Bajpai, J., additional, Shet, T., additional, Desai, S., additional, Popat, P., additional, Rajan, R., additional, Nair, N.S., additional, Joshi, S., additional, Pathak, R., additional, Sarin, R., additional, Kembhavi, Y., additional, Rane, S., additional, Ghosh, J., additional, Badwe, R.A., additional, and Gupta, S., additional

Published
2022
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80. Impact of abdominal aortic aneurysm screening on quality of life

Author

Bath, M. F., Sidloff, D., Saratzis, A., Bown, M. J., Pathak, R., Brooks, M., Hayes, P., Imray, C., Quarmby, J., Choksy, S., Earnshaw, J. J., Shearman, C. P., Grocott, E., Rix, T., Chetter, I., Tennant, W., Libertiny, G., Sykes, T., Dayer, M., Pike, L., Pherwani, A., Nice, C., Browning, N., McCollum, C., Yusuf, S., Gannon, M., Barwell, J., Baker, S., Vallabhaneni, S. R., and Davies, A.

Published
2018
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