TRANSIENT EXPOSURE TO VEHICLE EXHAUST PLUMES INSIDE NEW DELHI AUTO-RICKSHAWS

2011 ◽  
Vol 2011 (1) ◽  
Author(s):  
Joshua S. Apte ◽  
Julian D. Marshall ◽  
William W Nazaroff
Keyword(s):  
New Delhi ◽  
Vehicle Exhaust ◽  
Exhaust Plumes

Commuter Exposure to Vehicle Exhaust Plumes in New Delhi, India

Epidemiology ◽  
2011 ◽  
Vol 22 ◽  
pp. S146
Author(s):  
Joshua S. Apte ◽  
Thomas W. Kirchstetter ◽  
Julian D. Marshall ◽  
William W. Nazaroff
Keyword(s):  
New Delhi ◽  
Vehicle Exhaust ◽  
Exhaust Plumes ◽  
Commuter Exposure

Infrared measurements of launch vehicle exhaust plumes

2017 ◽  
Author(s):  
Caroline Schweitzer ◽  
Norbert Wendelstein ◽  
Karin U. Stein ◽  
Phillip Ohmer
Keyword(s):  
Launch Vehicle ◽  
Vehicle Exhaust ◽  
Infrared Measurements ◽  
Exhaust Plumes

scholarly journals The Construction and Application of a Multipoint Sampling System for Vehicle Exhaust Plumes

2017 ◽  
Vol 17 (7) ◽  
pp. 1705-1716
Author(s):  
Xianbao Shen ◽  
Zhiliang Yao ◽  
Kebin He ◽  
Xinyue Cao ◽  
Huan Liu
Keyword(s):  
Vehicle Exhaust ◽  
Sampling System ◽  
Exhaust Plumes

scholarly journals Characterization of particulate matter emissions from on-road gasoline and diesel vehicles using a soot particle aerosol mass spectrometer

2014 ◽  
Vol 14 (3) ◽  
pp. 4007-4049 ◽  
Author(s):  
T. R. Dallmann ◽  
T. B. Onasch ◽  
T. W. Kirchstetter ◽  
D. R. Worton ◽  
E. C. Fortner ◽  
...  
Keyword(s):  
Trace Elements ◽  
Particulate Matter ◽  
Soot Particle ◽  
Organic Aerosol ◽  
Lubricating Oil ◽  
Vehicle Exhaust ◽  
Aerosol Mass Spectrometer ◽  
Diesel Vehicles ◽  
Aerosol Mass ◽  
Exhaust Plumes

Abstract. Particulate matter (PM) emissions were measured in July 2010 from on-road motor vehicles driving through a highway tunnel in the San Francisco Bay area. A soot particle aerosol mass spectrometer (SP-AMS) was used to measure the chemical composition of PM emitted by gasoline and diesel vehicles at high time resolution. Organic aerosol (OA) and black carbon (BC) concentrations were measured during various time periods that had different levels of diesel influence, as well as directly in the exhaust plumes of individual heavy-duty (HD) diesel trucks. BC emission factor distributions for HD trucks were more skewed than OA distributions, with the highest 10% of trucks accounting for 56 and 42% of total measured BC and OA emissions, respectively. A comparison of measured OA and BC mass spectra across various sampling periods revealed a high degree of similarity in BC and OA emitted by gasoline and diesel engines. Cycloalkanes predominate in exhaust OA emissions relative to saturated alkanes (i.e., normal and iso-paraffins), suggesting that lubricating oil rather than fuel is the dominant source of primary organic aerosol (POA) emissions in diesel vehicle exhaust. This finding is supported by the detection of trace elements such as zinc and phosphorus in the exhaust plumes of individual trucks. Trace elements were emitted relative to total OA at levels that are consistent with typical weight fractions of commonly used additives present in lubricating oil. The presence of trace elements in vehicle exhaust raises the concern that ash deposits may accumulate over time in diesel particle filter systems, and may eventually lead to performance problems that require servicing.

Lidar measurements of launch vehicle exhaust plumes

1997 ◽  
Author(s):  
Phan D. Dao ◽  
David D. Curtis ◽  
Robert Farley ◽  
Philip Soletsky ◽  
Gilbert Davidson ◽  
...  
Keyword(s):  
Launch Vehicle ◽  
Vehicle Exhaust ◽  
Lidar Measurements ◽  
Exhaust Plumes

TO STUDY THE ETIOPATHOLOGICAL SPECTRUM OF ADULT PATIENTS WITH PANCYTOPENIA

2020 ◽  
Vol 4 (10) ◽  
Author(s):  
Harimohan Garg ◽  
Haritej Anand Khirawari ◽  
Sona Priyadarshi
Keyword(s):  
Acute Leukemia ◽  
Aplastic Anemia ◽  
Indian Subcontinent ◽  
Megaloblastic Anemia ◽  
Anaplastic Carcinoma ◽  
Adult Patients ◽  
Research Centre ◽  
New Delhi ◽  
Nutritional Anemia ◽  
Male Preponderance

Background: Pancytopenia is diagnosed when there is a reduction in all three hematopoietic cell lines. Till date there is limited number of studies on the frequency of various causes of pancytopenia. Of these some have been reported from the Indian subcontinent. There appears to be a changing spectrum of pancytopenia over the past two decades. The objective was to study the etiopathological spectrum of adult patients with pancytopenia over a period of one and half year. Methods: The Prospective and retrospective observational study was conducted in the Department of Family Medicine, Batra Hospital and Medical Research Centre, New Delhi.  A total of 120 Patients were included in the study. All patients gave their consent to take part in the study and were subjected to a questionnaire regarding symptoms, past relevant history, lifestyle and detailed clinical examination and investigations as mentioned in materials and methods. Results: Six broad diagnostic groups could be identified in adults with pancytopenia. Megaloblastic anemia (D1) was the largest group comprising 57.5% of all patients. 11.7% of patients with pancytopenia were diagnosed as Aplastic anemia (D2).11.7% of patients with pancytopenia were diagnosed as leukemia/lymphoma (D3) such as lymphoma (1), metastatic anaplastic carcinoma (1), acute leukemia (11), and metastatic gastric carcinoma (1). 15% of patients with pancytopenia were diagnosed with infections (D4) such as complicated malaria cases (7), HIV (5), disseminated tuberculosis (4), viral (2). We also encountered (D5) 0.8% was Myelophthisis/Storage disorder as myelodysplastic syndrome (1) and 3.3% were other (D6) as reactive marrow (4). Conclusion: Pancytopenia is not a disease itself. It is a hematological feature of varying etiology with slight male preponderance. Megaloblastic anemia along with mixed nutritional anemia is leading cause of pancytopenia in India followed by infections being second and aplastic anemia and acute leukemia being third common causes. Keyword: Pancytopenia, Megaloblastic anemia, Nutritional anemia.

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