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Kiehl JT, Ramanathan V. CO2radiative parameterization used in climate models: Comparison with narrow band models and with laboratory data. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/jc088ic09p05191] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mishra BK, Karthikeyan S, Ramanathan V. Tuning the C–H···π Interaction by Different Substitutions in Benzene–Acetylene Complexes. J Chem Theory Comput 2012; 8:1935-42. [DOI: 10.1021/ct300100h] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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Shindell D, Kuylenstierna JCI, Vignati E, van Dingenen R, Amann M, Klimont Z, Anenberg SC, Muller N, Janssens-Maenhout G, Raes F, Schwartz J, Faluvegi G, Pozzoli L, Kupiainen K, Höglund-Isaksson L, Emberson L, Streets D, Ramanathan V, Hicks K, Oanh NTK, Milly G, Williams M, Demkine V, Fowler D. Simultaneously mitigating near-term climate change and improving human health and food security. Science 2012; 335:183-9. [PMID: 22246768 DOI: 10.1126/science.1210026] [Citation(s) in RCA: 294] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Tropospheric ozone and black carbon (BC) contribute to both degraded air quality and global warming. We considered ~400 emission control measures to reduce these pollutants by using current technology and experience. We identified 14 measures targeting methane and BC emissions that reduce projected global mean warming ~0.5°C by 2050. This strategy avoids 0.7 to 4.7 million annual premature deaths from outdoor air pollution and increases annual crop yields by 30 to 135 million metric tons due to ozone reductions in 2030 and beyond. Benefits of methane emissions reductions are valued at $700 to $5000 per metric ton, which is well above typical marginal abatement costs (less than $250). The selected controls target different sources and influence climate on shorter time scales than those of carbon dioxide-reduction measures. Implementing both substantially reduces the risks of crossing the 2°C threshold.
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Evan AT, Kossin JP, ‘Eddy’ Chung C, Ramanathan V. Arabian Sea tropical cyclones intensified by emissions of black carbon and other aerosols. Nature 2011; 479:94-7. [DOI: 10.1038/nature10552] [Citation(s) in RCA: 121] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 09/07/2011] [Indexed: 11/09/2022]
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Drummond F, Lewis L, Bourne C, Ramanathan V, Hocking J, Wand H, Donovan B, Kaldor J, Guy R. P1-S6.32 Optimising clinical systems to increase HIV/STI testing in gay men: the eTEST project. Br J Vener Dis 2011. [DOI: 10.1136/sextrans-2011-050108.256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Majumdar D, Mohammed SS, Naseer MA, Jacob J, Mohan R, Ebenezer SB, Al Najar B, Al-Janahi S, Ramanathan V, Sabt SA, Patnaik RS, Hassan A. Respiratory gated simultaneous integrated boost-intensity modulated radiotherapy (SIB-IMRT) after breast conservative surgery for carcinoma of the breast: The Salmaniya Medical complex experience. Gulf J Oncolog 2011:53-59. [PMID: 21724530] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/17/2011] [Indexed: 05/31/2023]
Abstract
PURPOSE To present our clinical experience using SIB-IMRT Technique for Intact Breast cancer. MATERIALS AND METHODS A retrospective review of 45 cases of Stage I-IV breast cancer patients treated with SIB-IMRT with respiratory gating after Conservative treatments from 25th November 2008 to 16th February 2010. The most common fractionation was 1.8 Gy to Ipsilateral Breast tissue and 2.2 Gy to the lumpectomy cavity giving whole breast dose as 50.4 Gy and Lumpectomy cavity dose as 61.6 Gy over 28 fractions concomitantly. Respiratory gating was done and CT-images were taken in inspiratory breath hold position. RESULTS A total of 45 patients with breast cancer - stage I (17.7%), II (71%), III (8.9%), IV (2.2%) were treated with SIB- IMRT with respiratory gated radiotherapy. Out of 45 patients, 24 are of left sided breast cancer and 21 are of right sided breast cancer patients. The median, Dose maximum (D-max) in SIB-IMRT is 106.2% of prescribed lumpectomy site dose. The median isodose line prescribed to PTV-2 is 100%. The Conformity index (CI) is 0.9688 (median value) and Homogeneity index (HI) 1.06 (median). The median ipsilateral lung, mean dose is 21.66 Gy and V-20 is 37.4%. For left sided cases the median value of mean heart dose, V-30 and V-40 are 22.98 Gy, 23.45% and 9.45 % respectively. Acute skin toxicity was of Grade-I in 2.2 %, Grade-II in 64.4 %, Grade-III in 31.1 %, and Grade-IV in 2.2 %. The global Breast cosmoses were seen excellent in majority (93%) of case at median follow up of 8 months duration. CONCLUSIONS Breast SIB-IMRT Technique is feasible and comparable with other treatment techniques with reduced treatment duration by six fractions. At median follow up of 8 months the skin toxicity and cosmoses are excellent in high percentage of cases.
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Mansouri MD, Ramanathan V, Al-Sharif AH, Darouiche RO. Efficacy of trypsin in enhancing assessment of bacterial colonisation of vascular catheters. J Hosp Infect 2010; 76:328-31. [PMID: 20880606 PMCID: PMC2984558 DOI: 10.1016/j.jhin.2010.07.009] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2010] [Accepted: 07/17/2010] [Indexed: 10/19/2022]
Abstract
Since the number of organisms isolated from a medical device is crucial in assessing the likelihood of device-associated infection, we examined whether incubation of catheters in trypsin before sonication can increase the yield of superficially colonised vascular catheters in vitro and those removed from patients. Polyurethane and silicone catheters were individually colonised in vitro with individual clinical isolates including Staphylococcus aureus and Escherichia coli. Equal numbers of 1 cm segments of colonised catheters were then individually incubated either in a trypsin-containing solution or a control solution without trypsin. Each solution containing the segment was then sonicated and cultured quantitatively. In the clinical arm, indwelling catheters removed from patients were also cut into 1 cm segments that were equally suspended in the trypsin-containing or control solution and then sonicated and cultured quantitatively. Trypsin-based sonication enhanced the detection of S. aureus on colonised polyurethane and silicone catheters in vitro by 14- and 30-fold, respectively (P = 0.03 and P = 0.04), and the detection of E. coli on colonised polyurethane and silicone catheters by 3- and 6-fold, respectively (P = 0.04 and P = 0.05). Compared with sonication alone, trypsin followed by sonication resulted in 10% increase in the detectability of significant colonisation of indwelling catheters removed from patients and 11% increase in the mean colony counts of colonising organisms (P = 0.04). Exposure of catheters to trypsin before sonication improves the sensitivity of sonication and enhances the accuracy of assessing significant catheter colonisation.
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Stone EA, Schauer JJ, Pradhan BB, Dangol PM, Habib G, Venkataraman C, Ramanathan V. Characterization of emissions from South Asian biofuels and application to source apportionment of carbonaceous aerosol in the Himalayas. ACTA ACUST UNITED AC 2010. [DOI: 10.1029/2009jd011881] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Parikh M, Dolson G, Ramanathan V, Sangsiraprapha W. Novel H1N1-associated rhabdomyolysis leading to acute renal failure. Clin Microbiol Infect 2010; 16:330-2. [PMID: 20132248 DOI: 10.1111/j.1469-0691.2010.03185.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The WHO recently declared that the novel influenza H1N1 virus was responsible for the 2009 flu pandemic. As the virus continues to spread globally and affect more individuals, more complications of infection with this virus are being recognized. To our knowledge, we report the first case of H1N1-induced rhabdomyolysis leading to acute renal failure in an adult. This case highlights the importance of recognizing a significant extrapulmonary complication of H1N1 infection.
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Stith JL, Ramanathan V, Cooper WA, Roberts GC, DeMott PJ, Carmichael G, Hatch CD, Adhikary B, Twohy CH, Rogers DC, Baumgardner D, Prenni AJ, Campos T, Gao R, Anderson J, Feng Y. An overview of aircraft observations from the Pacific Dust Experiment campaign. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2008jd010924] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Karaminkov R, Chervenkov S, Neusser HJ, Ramanathan V, Chakraborty T. Competition between π and σ hydrogen bonds and conformational probing of 2-orthofluorophenylethanol by low-and high-resolution electronic spectroscopy. J Chem Phys 2009; 130:034301. [DOI: 10.1063/1.3058483] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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Spencer MT, Holecek JC, Corrigan CE, Ramanathan V, Prather KA. Size-resolved chemical composition of aerosol particles during a monsoonal transition period over the Indian Ocean. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd008657] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Mishra BK, Bajpai VK, Ramanathan V, Gadre S, Sathyamurthy N. Cation-π interaction: to stack or to spread. Mol Phys 2008. [DOI: 10.1080/00268970802175290] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ramanathan V, Pandey P, Chakraborty T. Laser induced fluorescence spectroscopy of jet cooled trans 1-methoxynaphthalene: A comparative study with trans 1-hydroxynapthalene. Chem Phys Lett 2008. [DOI: 10.1016/j.cplett.2008.03.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Kim D, Ramanathan V. Solar radiation budget and radiative forcing due to aerosols and clouds. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jd008434] [Citation(s) in RCA: 148] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Stone EA, Lough GC, Schauer JJ, Praveen PS, Corrigan CE, Ramanathan V. Understanding the origin of black carbon in the atmospheric brown cloud over the Indian Ocean. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008118] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ramanathan V, Li F, Ramana MV, Praveen PS, Kim D, Corrigan CE, Nguyen H, Stone EA, Schauer JJ, Carmichael GR, Adhikary B, Yoon SC. Atmospheric brown clouds: Hemispherical and regional variations in long-range transport, absorption, and radiative forcing. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd008124] [Citation(s) in RCA: 342] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Zhu A, Ramanathan V, Li F, Kim D. Dust plumes over the Pacific, Indian, and Atlantic oceans: Climatology and radiative impact. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2007jd008427] [Citation(s) in RCA: 150] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Hadley OL, Ramanathan V, Carmichael GR, Tang Y, Corrigan CE, Roberts GC, Mauger GS. Trans-Pacific transport of black carbon and fine aerosols (D< 2.5μm) into North America. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007632] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Auffhammer M, Ramanathan V, Vincent JR. Integrated model shows that atmospheric brown clouds and greenhouse gases have reduced rice harvests in India. Proc Natl Acad Sci U S A 2006; 103:19668-72. [PMID: 17158795 PMCID: PMC1693867 DOI: 10.1073/pnas.0609584104] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Previous studies have found that atmospheric brown clouds partially offset the warming effects of greenhouse gases. This finding suggests a tradeoff between the impacts of reducing emissions of aerosols and greenhouse gases. Results from a statistical model of historical rice harvests in India, coupled with regional climate scenarios from a parallel climate model, indicate that joint reductions in brown clouds and greenhouse gases would in fact have complementary, positive impacts on harvests. The results also imply that adverse climate changes due to brown clouds and greenhouse gases contributed to the slowdown in harvest growth that occurred during the past two decades.
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Ramana MV, Ramanathan V. Abrupt transition from natural to anthropogenic aerosol radiative forcing: Observations at the ABC-Maldives Climate Observatory. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2006jd007063] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Roberts G, Mauger G, Hadley O, Ramanathan V. North American and Asian aerosols over the eastern Pacific Ocean and their role in regulating cloud condensation nuclei. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006661] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Mikhailov EF, Vlasenko SS, Podgorny IA, Ramanathan V, Corrigan CE. Optical properties of soot–water drop agglomerates: An experimental study. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006389] [Citation(s) in RCA: 157] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Corrigan CE, Ramanathan V, Schauer JJ. Impact of monsoon transitions on the physical and optical properties of aerosols. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jd006370] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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