Gurumurthy Ramachandran

Summary

Affiliation: University of Minnesota
Country: USA

Publications

  1. ncbi request reprint Statistical comparison of diesel particulate matter measurement methods
    Gurumurthy Ramachandran
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Mayo Mail Code 807, 420 Delaware St S E, Minneapolis, MN 55455, USA
    AIHA J (Fairfax, Va) 64:329-37. 2003
  2. ncbi request reprint Expert judgment and occupational hygiene: application to aerosol speciation in the nickel primary production industry
    Gurumurthy Ramachandran
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 47:461-75. 2003
  3. doi request reprint A strategy for assessing workplace exposures to nanomaterials
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 8:673-85. 2011
  4. ncbi request reprint Indoor air quality in two urban elementary schools--measurements of airborne fungi, carpet allergens, CO2, temperature, and relative humidity
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 2:553-66. 2005
  5. doi request reprint Occupational exposure decisions: can limited data interpretation training help improve accuracy?
    Perry Logan
    Division of EnvironmentalHealth Sciences, Universityof Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 53:311-24. 2009
  6. pmc Outdoor, indoor, and personal exposure to VOCs in children
    John L Adgate
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 520 Delaware Street SE, Minneapolis, MN 55455, USA
    Environ Health Perspect 112:1386-92. 2004
  7. ncbi request reprint Longitudinal evaluation of allergen and culturable fungal concentrations in inner-city households
    Sook Ja Cho
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
    J Occup Environ Hyg 5:107-18. 2008
  8. ncbi request reprint Relationships between personal, indoor, and outdoor exposures to trace elements in PM(2.5)
    John L Adgate
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware St SE, MMC 807, Minneapolis, MN 55455, USA
    Sci Total Environ 386:21-32. 2007
  9. ncbi request reprint Evaluating differences between measured personal exposures to volatile organic compounds and concentrations in outdoor and indoor air
    Ken Sexton
    School of Public Health, University of Texas, Brownsville Regional Campus, RAHC Building, 80 Fort Brown, Brownsville, Texas 78520, USA
    Environ Sci Technol 38:2593-602. 2004
  10. doi request reprint Seasonal variability of culturable fungal genera in the house dust of inner-city residences
    Sook Ja Cho
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
    J Occup Environ Hyg 5:780-9. 2008

Research Grants

  1. Silica Exposure & Silicosis: Effect of Mixed Exposures
    Gurumurthy Ramachandran; Fiscal Year: 2002
  2. Retrospective Assessment of Mixed Chemical Exposures
    Gurumurthy Ramachandran; Fiscal Year: 2003
  3. Expert Decision-making in Exposure Assessment
    Gurumurthy Ramachandran; Fiscal Year: 2005
  4. Expert Decision-making in Exposure Assessment
    Gurumurthy Ramachandran; Fiscal Year: 2007

Collaborators

Detail Information

Publications38

  1. ncbi request reprint Statistical comparison of diesel particulate matter measurement methods
    Gurumurthy Ramachandran
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Mayo Mail Code 807, 420 Delaware St S E, Minneapolis, MN 55455, USA
    AIHA J (Fairfax, Va) 64:329-37. 2003
    ..Of the three, the SSG method has the highest level of interference, primarily from nondiesel material that is collected in the <0.8 microm size range...
  2. ncbi request reprint Expert judgment and occupational hygiene: application to aerosol speciation in the nickel primary production industry
    Gurumurthy Ramachandran
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 47:461-75. 2003
    ..However, more study is warranted for situations where the domain of the quantity of interest has a much wider range of values, e.g. actual exposure values...
  3. doi request reprint A strategy for assessing workplace exposures to nanomaterials
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 8:673-85. 2011
    ..The article is intended to be a practical guide for industrial hygienists for managing engineered nanomaterial risks in their workplaces...
  4. ncbi request reprint Indoor air quality in two urban elementary schools--measurements of airborne fungi, carpet allergens, CO2, temperature, and relative humidity
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 2:553-66. 2005
    ..The results show that for fungi and cat allergens, the school environment can be an important exposure source for children...
  5. doi request reprint Occupational exposure decisions: can limited data interpretation training help improve accuracy?
    Perry Logan
    Division of EnvironmentalHealth Sciences, Universityof Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 53:311-24. 2009
    ..The finding that even some simple statistical rules of thumb improve judgment accuracy significantly suggests that hygienists need to routinely use statistical tools while making exposure judgments using monitoring data...
  6. pmc Outdoor, indoor, and personal exposure to VOCs in children
    John L Adgate
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 520 Delaware Street SE, Minneapolis, MN 55455, USA
    Environ Health Perspect 112:1386-92. 2004
    ..Median and upper-bound H and P exposures were well above health benchmarks for several compounds, so outdoor measurements likely underestimate long-term health risks from children's exposure to these compounds...
  7. ncbi request reprint Longitudinal evaluation of allergen and culturable fungal concentrations in inner-city households
    Sook Ja Cho
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
    J Occup Environ Hyg 5:107-18. 2008
    ..Total culturable fungi will require greater than nine repeated measurements for robust assessment of long-term exposures because of low correlations in fungal measures over time...
  8. ncbi request reprint Relationships between personal, indoor, and outdoor exposures to trace elements in PM(2.5)
    John L Adgate
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware St SE, MMC 807, Minneapolis, MN 55455, USA
    Sci Total Environ 386:21-32. 2007
    ..5) is likely to be underestimated by outdoor central site monitors...
  9. ncbi request reprint Evaluating differences between measured personal exposures to volatile organic compounds and concentrations in outdoor and indoor air
    Ken Sexton
    School of Public Health, University of Texas, Brownsville Regional Campus, RAHC Building, 80 Fort Brown, Brownsville, Texas 78520, USA
    Environ Sci Technol 38:2593-602. 2004
    ..A simple time-weighted model incorporating measured concentrations in both outdoor community air and indoor residential air provided no improvement over I concentration alone for the estimation of P exposure...
  10. doi request reprint Seasonal variability of culturable fungal genera in the house dust of inner-city residences
    Sook Ja Cho
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
    J Occup Environ Hyg 5:780-9. 2008
    ..3) were substantially larger than that observed for total fungi (2.5). These results suggest that future studies attempting to link individual fungal genera to health effects need to characterize and control for this seasonal variability...
  11. ncbi request reprint Allergen levels in inner city homes: baseline concentrations and evaluation of intervention effectiveness
    John L Adgate
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnessota, USA
    J Expo Sci Environ Epidemiol 18:430-40. 2008
    ....
  12. pmc Children's exposure to environmental tobacco smoke: using diverse exposure metrics to document ethnic/racial differences
    Ken Sexton
    School of Public Health, University of Texas, Brownsville Regional Campus, 80 Fort Brown, RAHC Building, Brownsville, TX 78520, USA
    Environ Health Perspect 112:392-7. 2004
    ..73). The results suggest that when children are exposed to ETS primarily in their homes, questionnaires and T-A logs might be effective screening tools for identifying those likely to experience higher uptake of nicotine...
  13. ncbi request reprint Asthma, atopy, and lung function among racially diverse, poor inner-urban Minneapolis schoolchildren
    Ian A Greaves
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, MMC 807, 420 Delaware Street S E, Minneapolis, MN 55455, USA
    Environ Res 103:257-66. 2007
    ..A history of physician-diagnosed asthma was not associated with decreased lung function. Factors other than poverty, inner-urban living, and IgE levels (atopy) need to be considered in the development of childhood asthma...
  14. doi request reprint Brain cancer in workers employed at a specialty chemical research facility
    Bruce H Alexander
    Division of Environmental Health Sciences, University of Minnesota School of Public Health, Minneapolis, MN 55455, USA
    Arch Environ Occup Health 68:218-27. 2013
    ..11-3.40). Exposures to 5 specific chemical categories were assessed. Exploration of work history and the specific chemical exposures did not explain the brain cancer cases. No clear occupational etiology was identified...
  15. doi request reprint Comparing exposure zones by different exposure metrics using statistical parameters: contrast and precision
    Ji Young Park
    University of Minnesota, Minneapolis, 55455, USA
    Ann Occup Hyg 54:799-812. 2010
    ..Because the choice of an exposure metric has significant implications for epidemiologic studies and industrial hygiene practice, a multimetric sampling approach is recommended for nanoparticle exposure assessment...
  16. doi request reprint Quartz concentration trends in metal and nonmetal mining
    Winthrop F Watts
    University of Minnesota, Department of Mechanical Engineering, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 9:720-32. 2012
    ..Reduction in respirable quartz dust concentration does not necessarily correspond to a reduction in quartz concentration within the same commodity group. These trends are consistent with those reported in previous studies...
  17. doi request reprint Retrospective exposure assessment in a chemical research and development facility
    Yu Cheng Chen
    University of Minnesota, Division of Environmental Health Science, School of Public Health, Minneapolis, Minnesota 55455, USA
    Environ Int 39:111-21. 2012
    ..The combination of methods used in this work is a unique and potentially helpful framework that can be used in analogous workplace settings involving multiple exposures with incomplete objective measurement information...
  18. doi request reprint Effect of training on exposure judgment accuracy of industrial hygienists
    Monika Vadali
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware St SE, Minneapolis, MN 55455, USA
    J Occup Environ Hyg 9:242-56. 2012
    ..It may be worthwhile to develop standard training programs to improve exposure judgments...
  19. doi request reprint Determination of particle concentration rankings by spatial mapping of particle surface area, number, and mass concentrations in a restaurant and a die casting plant
    Ji Young Park
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 7:466-76. 2010
    ..Thus, the choice of appropriate exposure metric has significant implications for exposure groupings in epidemiologic and occupational exposure studies...
  20. pmc Bayesian modeling of exposure and airflow using two-zone models
    Yufen Zhang
    Division of Biostatistics, University of Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 53:409-24. 2009
    ....
  21. doi request reprint Desktop study of occupational exposure judgments: do education and experience influence accuracy?
    Perry W Logan
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 8:746-58. 2011
    ..The findings also suggest methods for enhancing exposure judgment accuracy through statistical tools, mathematical exposure modeling, and specific training...
  22. ncbi request reprint Mass, surface area and number metrics in diesel occupational exposure assessment
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, MMC 807, 420 Delaware Street SE, Minneapolis, MN 55455, USA
    J Environ Monit 7:728-35. 2005
    ..The exposure rankings (e.g., low, medium, or high) of the three groups also changes with the metric used. If the incorrect metric is used, significant misclassification errors may occur...
  23. ncbi request reprint Comparison of personal, indoor, and outdoor exposures to hazardous air pollutants in three urban communities
    Ken Sexton
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    Environ Sci Technol 38:423-30. 2004
    ..Results indicate that ambient VOC measurements at central monitoring sites can seriously underestimate actual exposures for urban residents, even when the outdoor measurements are taken in their own neighborhoods...
  24. doi request reprint Effect of training, education, professional experience, and need for cognition on accuracy of exposure assessment decision-making
    Monika Vadali
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, MN 55455, USA
    Ann Occup Hyg 56:292-304. 2012
    ....
  25. pmc Recruitment, retention, and compliance results from a probability study of children's environmental health in economically disadvantaged neighborhoods
    Ken Sexton
    Division of Environmental and Occupational Health, School of Public Health, University of Minnesota, Minneapolis, Minnesota, USA
    Environ Health Perspect 111:731-6. 2003
    ..There is an ongoing need, however, to improve understanding of the cultural, economic, psychologic, and social determinants of study participation among this population...
  26. doi request reprint Exposure modeling in occupational hygiene decision making
    Monika Vadali
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    J Occup Environ Hyg 6:353-62. 2009
    ..Hypothetical examples using commonly used exposure models are presented, along with a discussion of how this framework can be used given a hierarchy of exposure models...
  27. doi request reprint Toward better exposure assessment strategies--the new NIOSH initiative
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, Mayo Mail Code 807, 420 Delaware Street, SE, Minneapolis, MN 55455, USA
    Ann Occup Hyg 52:297-301. 2008
    ..Bayesian statistics offers a rational approach to integrating sampling data, professional judgments, and the outputs of exposure models in a comprehensive framework...
  28. pmc Radiographic evidence of nonoccupational asbestos exposure from processing Libby vermiculite in Minneapolis, Minnesota
    Bruce H Alexander
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota, 420 Delaware St SE, Minneapolis, MN 55455, USA
    Environ Health Perspect 120:44-9. 2012
    ..Community exposure to asbestos from contaminated vermiculite ore from Libby, Montana, occurred in many processing sites in the United States, including a densely populated urban residential neighborhood of Minneapolis, Minnesota...
  29. doi request reprint Handling worker and third-party exposures to nanotherapeutics during clinical trials
    Gurumurthy Ramachandran
    Division of Environmental Health Sciences, School of Public Health, University of Minnesota in Minneapolis, MN, USA
    J Law Med Ethics 40:856-64. 2012
    ..Given the current state of knowledge regarding health risks from such exposures, a more precautionary approach to oversight seems advisable...
  30. ncbi request reprint The impact of toxicity testing costs on nanomaterial regulation
    Jae Young Choi
    Division of Health Policy and Management and Division of Environmental Health Science, School of Public Health, University of Minnesota, Minneapolis, Minnesota 55455, USA
    Environ Sci Technol 43:3030-4. 2009
    ..The delays are considerably less if less-stringent yet risk-averse perspectives are used. Our results support a tiered risk-assessment strategy similar to the EU's REACH legislation for regulating toxic chemicals...
  31. doi request reprint An integrated approach to oversight assessment for emerging technologies
    Jennifer Kuzma
    Center for Science, Technology, and Public Policy, Hubert H Humphrey Institute, University of Minnesota, 301 19th Ave S, Minneapolis, MN 55455, USA
    Risk Anal 28:1197-220. 2008
    ....
  32. ncbi request reprint Comparing air dispersion model predictions with measured concentrations of VOCs in urban communities
    Gregory C Pratt
    Environmental Outcomes Division, Minnesota Pollution Control Agency, 520 Lafayette Road, St Paul, Minnesota 55155, USA
    Environ Sci Technol 38:1949-59. 2004
    ....
  33. pmc Children's exposure to volatile organic compounds as determined by longitudinal measurements in blood
    Ken Sexton
    University of Texas School of Public Health, Brownsville Regional Campus, Brownsville, Texas, USA
    Environ Health Perspect 113:342-9. 2005
    ..For siblings living in the same household, we found strong statistical associations between measured blood VOC concentrations...
  34. ncbi request reprint A field comparison of volatile organic compound measurements using passive organic vapor monitors and stainless steel canisters
    Gregory C Pratt
    Environmental Outcomes Division, Minnesota Pollution Control Agency, 520 Lafayette Road, St Paul, Minnesota 55155, USA
    Environ Sci Technol 39:3261-8. 2005
    ..We provide data and interpretation on the relative performance of the two VOC measurement methods, which facilitates intercomparisons among studies...
  35. ncbi request reprint Rating exposure control using Bayesian decision analysis
    Paul Hewett
    Exposure Assessment Solutions, Inc, Morgantown, West Virginia 26508, USA
    J Occup Environ Hyg 3:568-81. 2006
    ..In either case, the industrial hygienist should readjust his judgment regarding this operation...
  36. ncbi request reprint Upper limits for exceedance probabilities under the one-way random effects model
    K Krishnamoorthy
    Department of Mathematics, University of Louisiana at Lafayette, Lafayette, LA 70504, USA
    Ann Occup Hyg 51:397-406. 2007
    ..The methods are conceptually as well as computationally simple. Two data sets involving industrial exposure data are used to illustrate the methods...
  37. ncbi request reprint Estimating volatile organic compound concentrations in selected microenvironments using time-activity and personal exposure data
    Ken Sexton
    Brownsville Regional Campus, University of Texas School of Public Health, Brownsville, Texas 78520, USA
    J Toxicol Environ Health A 70:465-76. 2007
    ....
  38. ncbi request reprint Generalized P-values and confidence intervals: a novel approach for analyzing lognormally distributed exposure data
    K Krishnamoorthy
    Department of Mathematics, University of Louisiana at Lafayette, Lafayette, Louisiana 70504, USA
    J Occup Environ Hyg 3:642-50. 2006
    ..We want to draw the attention of the industrial hygiene community to this accurate and unified methodology to deal with any parameter associated with the lognormal distribution...

Research Grants6

  1. Silica Exposure & Silicosis: Effect of Mixed Exposures
    Gurumurthy Ramachandran; Fiscal Year: 2002
    ....
  2. Retrospective Assessment of Mixed Chemical Exposures
    Gurumurthy Ramachandran; Fiscal Year: 2003
    ..However, the methods will be applicable to other industry based epidemiologic studies where the available data are sparse and exposures to chemical mixtures are the norm. ..
  3. Expert Decision-making in Exposure Assessment
    Gurumurthy Ramachandran; Fiscal Year: 2005
    ..The methodology will be developed using a large occupational exposure dataset from 3M Company, and probabilistic professional judgments obtained from occupational hygienists employed at 3M Company. ..
  4. Expert Decision-making in Exposure Assessment
    Gurumurthy Ramachandran; Fiscal Year: 2007
    ..The methodology will be developed using a large occupational exposure dataset from 3M Company, and probabilistic professional judgments obtained from occupational hygienists employed at 3M Company. ..