Occupational exposure assessment for air contaminants:
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| Format: | Electronic eBook |
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| Language: | English |
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Boca Raton, FL
Taylor & Francis
2005
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| Subjects: | |
| Online Access: | Publisher description Inhaltsverzeichnis |
| Physical Description: | 1 Online-Ressource |
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| adam_text | Table of Contents
SECTION I Introduction 1
Chapter 1 Framework for Occupational Exposure Assessment 3
1.1 Introduction 3
1.2 Framework for Occupational Exposure Assessment 3
1.2.1 Exposure Evaluation 3
1.2.2 Occupational Epidemiology 5
1.2.3 Source Characterization and Evaluation of Controls 5
1.2.4 Regulatory Purposes 5
1.3 Exposure Variability 6
1.4 Definition of Exposure 6
1.5 Definition of Dose 8
1.6 Overview of the Book 11
SECTION II Properties and Measurement
of Gases and Vapors 13
Chapter 2 Properties of Gases and Vapors 15
2.1 The Ideal Gas Law 15
2.2 Molar Volume 16
2.3 Standard Conditions for Air Sampling 17
2.4 Mixtures of Ideal Gases 17
2.5 Expressing Gas Contaminant Concentration in Different Ways 19
2.6 Kinetic Theory of Gases 20
2.7 Mean Free Path 23
2.8 Transport Phenomena 24
2.8.1 Diffusion 25
2.8.2 Viscosity 25
Chapter 3 Basic Concepts of Fluid Flow 29
3.1 Introduction 29
3.2 Equation of Continuity 31
. 3.3 Bernoulli s Equation 32
; 3.4 Conservation of Momentum 33
3.5 Similitude and Reynolds Number 34
Chapter 4 Uncertainties in Physical Measurements 37
4.1 What is a Measurement? 37
4.2 Components of a Measurement System 38
4.3 Calibration 39
4.4 Random and Systematic Errors 39
4.5 Propagation of Uncertainties 41
4.6 Quantifying Uncertainty 43
4.7 Histograms 44
4.8 Continuous Distributions 46
4.9 The Normal Distribution 48
4.10 Coefficient of Variation 51
4.11 Measurement Method Accuracy 51
4.12 Limit of Detection 52
4.13 Limit of Quantitation 53
Chapter 5 Measurement of Air Volumes and Flow Rates 55
5.1 Introduction 55
5.2 Elements of an Air Sampling System 55
5.3 Pumps and Air Movers 55
5.4 Flow Measurement and Calibration 58
5.4.1 Primary Standards 58
5.4.1.1 Spirometer 58
5.4.1.2 Soap Bubble Meter 59
5.4.2 Secondary Standards 60
5.4.2.1 Wet Test Meter 60
5.4.2.2 Rotameter 61
5.4.2.3 Orifice Meter 63
5.4.2.4 Critical Orifice 64
5.4.3 Calibration of Sampling Systems 65
Chapter 6 Gas and Vapor Sampling Methods 67
6.1 Introduction 67
6.2 Requirements of a Good Sampling Method 67
6.3 Sampling Strategies 68
6.3.1 Grab Sampling 68
6.3.2 Integrated Sampling 69
6.3.3 Area Sampling 70
6.3.4 Personal Sampling 71
6.4 Absorption 71
6.5 Adsorption 73
6.5.1 Nonpolar Sorbents 74
6.5.2 Polar Sorbents . . 75
6.5.3 Breakthrough 75
6.5.4 Desorption 77
6.5.5 Diffusive Samplers 78
6.6 Diffusive Samplers for Reactive Compounds 81
6.7 Detector Tubes 82
6.8 Accuracy of Gas and Vapor Sampling Methods 84
Chapter 7 Analytical Methods for Gases and Vapors: Gas Chromatography
and Mass Spectroscopy 85
7.1 Introduction 85
7.2 Gas Chromatography 85
7.2.1 Calibration Standards 87
7.2.2 Resolution 87
7.2.3 Efficiency 88
7.2.4 Components of a Gas Liquid Chromatograph 89
7.2.5 Detectors 90
7.3 Mass Spectrometry (MS) 91
7.3.1 Inlet Systems 92
7.3.2 Ion Sources 93
7.3.3 Mass Analyzers 94
7.3.4 Ion Collectors 95
7.3.5 Resolution 96
Chapter 8 Direct Reading Instruments for Gases and Vapors 97
8.1 Introduction 97
8.2 Instruments Based on Absorption or Emission of Electromagnetic
Radiation 97
8.2.1 Lambert Beer Law 99
8.2.2 Infrared Spectrophotometers 100
8.2.3 Ultraviolet and Visible Spectrophotometers 102
8.2.4 Chemiluminescence 102
8.3 Instruments Based on Electrochemical Properties 103
8.3.1 Conductance Devices 103
8.3.2 Potentiometry 103
8.4 Instruments Based on Thermal Properties 104
SECTION III Properties and Measurement
of Aerosols 107
Chapter 9 Basic Aerosol Properties 109
9.1 Introduction 109
9.2 Particle Shape and Density 110
9.3 Aerosol Generation and Properties 111
9.4 Equivalent Diameters 112
9.5 Aerosol Concentration 113
9.6 Particle Size Distributions 113
9.6.1 Mean, Median, and Standard Deviation 114
9.6.2 Histograms 115
9.6.3 The Lognormal Size Distribution 119
9.7 Log Probability Plots 125
9.8 The Hatch Choate Relationships 127
Chapter 10 Particle Motion in a Viscous Medium 129
10.1 Introduction 129
10.2 Drag Force on a Particle 129
10.3 Stokes Law 130
10.4 Modifications to Stokes Law 131
10.5 Equation of Motion for an Aerosol Particle 132
10.6 Particle Motion under Gravity 133
10.7 Further Generalizations 135
10.8 Particle Aerodynamic Diameter 136
10.9 Instruments Based on Particle Settling 137
10.10 Stopping Distance 138
10.11 Stokes Number 139
10.12 Inertial Impaction 139
10.13 Cascade Impactors 142
10.14 Particle Motion in an Electric Field 146
10.15 Particle Diffusion 148
Chapter 11 Inhalation and Respiratory Tract Deposition of Aerosols 151
11.1 Introduction 151
11.2 The Human Respiratory Tract 151
11.3 Penetration and Deposition Efficiency 154
11.4 Inhalation and the Inhalable Sampling Criterion 157
11.5 Extrathoracic Deposition 158
11.6 Thoracic Deposition 160
11.7 Total Deposition 161
11.8 Deposition Models 161
11.9 Thoracic and Respirable Criteria for Sampling 165
11.10 Application of Deposition Curves and Criteria Curves to
Estimating Exposures 168
11.11 Health Related Standards for Aerosol Exposure Assessment 170
Chapter 12 Sampling of Aerosols 173
12.1 Introduction 173
12.2 Elements of an Aerosol Sampling System 174
12.3 Aspiration Efficiency 174
12.4 Sampling Inlets 176
12.4.1 Sampling Using Thin Walled Probes 176
12.4.2 Sampling Using Blunt Samplers 180
12.4.3 Sampling for Inhalable Aerosols in Workplaces 181
12.4.4 Sampling for Thoracic and Respirable Aerosols
in Workplaces 183
12.4.5 Cascade Impactors 188
12.5 Sample Transport System 188
12.6 Filter Collection 191
12.6.1 Theory of Filtration 191
12.6.2 Filter Selection and Gravimetry 196
12.7 Special Sampling Problems: Vapor Particle Partitioning and
Measurement of Semivolatile Aerosols 197
Chapter 13 Direct Reading Instruments for Aerosols 199
13.1 Introduction 199
13.2 Instruments Based on Inertial Properties of Particles 199
13.3 Instruments Based on Mass Measurements 200
13.4 Instruments Based on Particle Charge Measurement 202
13.5 Condensation Nuclei Counters 205
13.6 Instruments Based on Particle Interactions with Light 206
13.6.1 Light Extinction 208
13.6.2 Calculation of Particle Extinction Efficiency, Qext 210
13.6.3 Light Scattering 212
13.6.4 Light Scattering and Mass Concentration 217
13.6.5 Optical Particle Counters 220
Chapter 14 Sampling for Pollutants of Biological Origin 221
14.1 Introduction 221
14.2 Types of Bioaerosols 222
14.2.1 Pollen 222
14.2.2 Fungi 222
14.2.3 Bacteria 223
14.2.4 Viruses 224
14.2.5 Other Bioaerosols 224
14.3 Bioaerosol Exposure Assessment Strategy 224
14.3.1 Health Surveys 225
14.3.2 Site Characterization 225
14.3.3 Hypothesis Formulation 226
14.3.4 Sampling 226
14.3.5 Analyze Data and Test Hypothesis 227
14.4 Measurement Methods for Bioaerosols 227
14.4.1 Impaction of Bioaerosols onto Agar 228
14.4.2 Impinging of Bioaerosols onto a Liquid 230
14.4.3 Sampling through a Filter 231
14.5 Statistical Issues 231
14.5.1 Lower Limits of Detection 231
14.5.2 Limits of Quantification 232
14.5.3 Upper Limits of Detection 232
SECTION IV Exposure Assessment Strategies.... 235
Chapter 15 Variability in Occupational Exposures 237
15.1 Introduction 237
15.2 Environmental Variability and Lognormal Distributions 237
15.3 Sampling and Analytical Variability 243
15.4 Exceedance Fraction 245
15.5 The 95th Percentile 248
15.6 Arithmetic Mean of the Lognormal Distribution 248
15.7 Between and Within Worker Variability 250
15.8 Averaging Time and Exposure Distributions 256
Chapter 16 Occupational Exposure Assessment Strategies 259
16.1 Introduction 259
16.2 Sample Collection 259
16.3 Occupational Exposure Limits 261
16.4 Classification of Workers into Similarly Exposed Groups 263
16.4.1 The Observational Approach 263
16.4.2 The Sampling Approach 264
16.4.3 A Hybrid Approach 265
16.5 Sample Size Requirements — Strategies for Decision Making 266
16.5.1 AIHA Strategy 266
16.5.2 OSHA Strategy 267
16.5.3 Effectiveness and Efficiency of Strategies for Decision Making .269
16.5.4 Comparing the Mean with an OEL 269
16.5.5 Estimating the Mean 271
16.6 Exposure Measurement Error and its Implications for Epidemiology 272
16.6.1 Classical Error Model 273
16.6.2 Berkson Error Model 274
Chapter 17 Exposure Modeling 279
17.1 Role of Modeling in Exposure Assessment 279
17.2 Saturation Vapor Pressure Model 281
17.3 The Well Mixed Room Model 281
17.3.1 Constant Emission Rate 282
17.3.2 Exponentially Decreasing Contaminant Emission Rate 285
17.4 The Near Field Far Field Model 286
17.5 Empirical Exposure Models 290
17.6 Monte Carlo Simulation Analysis in Modeling 292
Chapter 18 Reconstructing Historical Exposures 299
18.1 Introduction 299
18.2 Exposure Reconstruction 300
18.2.1 The Exposure Data Matrix 300
18.2.2 Measurement Errors in Exposures 300
18.2.3 Sparse Data 302
18.2.4 Exposure Variability 304
18.2.5 Imputation of Missing Values by Interpolation
and Extrapolation 305
18.2.6 Using Knowledge of Exposure Modifiers 306
18.2.7 Exposure Models 307
18.2.7.1 Contaminant Generation Models 307
18.2.7.2 Ventilation Box Models 308
18.2.7.3 Worker Time Activity Models 308
18.2.8 Leveraging All Relevant Information — Bayesian Methods 309
18.2.9 Using Expert Judgment along with Deterministic Models 311
18.2.10 Quality of Expert Judgment 314
18.2.11 Validation of Retrospective Exposure Assessment Estimates 315
18.3 Dose Estimation 316
18.3.1 Estimating R(t) 316
18.3.2 Estimating G(t) 320
18.4 Concluding Remarks 321
References 323
Index 331
|
| adam_txt |
Table of Contents
SECTION I Introduction 1
Chapter 1 Framework for Occupational Exposure Assessment 3
1.1 Introduction 3
1.2 Framework for Occupational Exposure Assessment 3
1.2.1 Exposure Evaluation 3
1.2.2 Occupational Epidemiology 5
1.2.3 Source Characterization and Evaluation of Controls 5
1.2.4 Regulatory Purposes 5
1.3 Exposure Variability 6
1.4 Definition of Exposure 6
1.5 Definition of Dose 8
1.6 Overview of the Book 11
SECTION II Properties and Measurement
of Gases and Vapors 13
Chapter 2 Properties of Gases and Vapors 15
2.1 The Ideal Gas Law 15
2.2 Molar Volume 16
2.3 Standard Conditions for Air Sampling 17
2.4 Mixtures of Ideal Gases 17
2.5 Expressing Gas Contaminant Concentration in Different Ways 19
2.6 Kinetic Theory of Gases 20
2.7 Mean Free Path 23
2.8 Transport Phenomena 24
2.8.1 Diffusion 25
2.8.2 Viscosity 25
Chapter 3 Basic Concepts of Fluid Flow 29
3.1 Introduction 29
3.2 Equation of Continuity 31
. 3.3 Bernoulli's Equation 32
; 3.4 Conservation of Momentum 33
3.5 Similitude and Reynolds Number 34
Chapter 4 Uncertainties in Physical Measurements 37
4.1 What is a Measurement? 37
4.2 Components of a Measurement System 38
4.3 Calibration 39
4.4 Random and Systematic Errors 39
4.5 Propagation of Uncertainties 41
4.6 Quantifying Uncertainty 43
4.7 Histograms 44
4.8 Continuous Distributions 46
4.9 The Normal Distribution 48
4.10 Coefficient of Variation 51
4.11 Measurement Method Accuracy 51
4.12 Limit of Detection 52
4.13 Limit of Quantitation 53
Chapter 5 Measurement of Air Volumes and Flow Rates 55
5.1 Introduction 55
5.2 Elements of an Air Sampling System 55
5.3 Pumps and Air Movers 55
5.4 Flow Measurement and Calibration 58
5.4.1 Primary Standards 58
5.4.1.1 Spirometer 58
5.4.1.2 Soap Bubble Meter 59
5.4.2 Secondary Standards 60
5.4.2.1 Wet Test Meter 60
5.4.2.2 Rotameter 61
5.4.2.3 Orifice Meter 63
5.4.2.4 Critical Orifice 64
5.4.3 Calibration of Sampling Systems 65
Chapter 6 Gas and Vapor Sampling Methods 67
6.1 Introduction 67
6.2 Requirements of a Good Sampling Method 67
6.3 Sampling Strategies 68
6.3.1 Grab Sampling 68
6.3.2 Integrated Sampling 69
6.3.3 Area Sampling 70
6.3.4 Personal Sampling 71
6.4 Absorption 71
6.5 Adsorption 73
6.5.1 Nonpolar Sorbents 74
6.5.2 Polar Sorbents .". 75
6.5.3 Breakthrough 75
6.5.4 Desorption 77
6.5.5 Diffusive Samplers 78
6.6 Diffusive Samplers for Reactive Compounds 81
6.7 Detector Tubes 82
6.8 Accuracy of Gas and Vapor Sampling Methods 84
Chapter 7 Analytical Methods for Gases and Vapors: Gas Chromatography
and Mass Spectroscopy 85
7.1 Introduction 85
7.2 Gas Chromatography 85
7.2.1 Calibration Standards 87
7.2.2 Resolution 87
7.2.3 Efficiency 88
7.2.4 Components of a Gas Liquid Chromatograph 89
7.2.5 Detectors 90
7.3 Mass Spectrometry (MS) 91
7.3.1 Inlet Systems 92
7.3.2 Ion Sources 93
7.3.3 Mass Analyzers 94
7.3.4 Ion Collectors 95
7.3.5 Resolution 96
Chapter 8 Direct Reading Instruments for Gases and Vapors 97
8.1 Introduction 97
8.2 Instruments Based on Absorption or Emission of Electromagnetic
Radiation 97
8.2.1 Lambert Beer Law 99
8.2.2 Infrared Spectrophotometers 100
8.2.3 Ultraviolet and Visible Spectrophotometers 102
8.2.4 Chemiluminescence 102
8.3 Instruments Based on Electrochemical Properties 103
8.3.1 Conductance Devices 103
8.3.2 Potentiometry 103
8.4 Instruments Based on Thermal Properties 104
SECTION III Properties and Measurement
of Aerosols 107
Chapter 9 Basic Aerosol Properties 109
9.1 Introduction 109
9.2 Particle Shape and Density 110
9.3 Aerosol Generation and Properties 111
9.4 Equivalent Diameters 112
9.5 Aerosol Concentration 113
9.6 Particle Size Distributions 113
9.6.1 Mean, Median, and Standard Deviation 114
9.6.2 Histograms 115
9.6.3 The Lognormal Size Distribution 119
9.7 Log Probability Plots 125
9.8 The Hatch Choate Relationships 127
Chapter 10 Particle Motion in a Viscous Medium 129
10.1 Introduction 129
10.2 Drag Force on a Particle 129
10.3 Stokes'Law 130
10.4 Modifications to Stokes' Law 131
10.5 Equation of Motion for an Aerosol Particle 132
10.6 Particle Motion under Gravity 133
10.7 Further Generalizations 135
10.8 Particle Aerodynamic Diameter 136
10.9 Instruments Based on Particle Settling 137
10.10 Stopping Distance 138
10.11 Stokes Number 139
10.12 Inertial Impaction 139
10.13 Cascade Impactors 142
10.14 Particle Motion in an Electric Field 146
10.15 Particle Diffusion 148
Chapter 11 Inhalation and Respiratory Tract Deposition of Aerosols 151
11.1 Introduction 151
11.2 The Human Respiratory Tract 151
11.3 Penetration and Deposition Efficiency 154
11.4 Inhalation and the Inhalable Sampling Criterion 157
11.5 Extrathoracic Deposition 158
11.6 Thoracic Deposition 160
11.7 Total Deposition 161
11.8 Deposition Models 161
11.9 Thoracic and Respirable Criteria for Sampling 165
11.10 Application of Deposition Curves and Criteria Curves to
Estimating Exposures 168
11.11 Health Related Standards for Aerosol Exposure Assessment 170
Chapter 12 Sampling of Aerosols 173
12.1 Introduction 173
12.2 Elements of an Aerosol Sampling System 174
12.3 Aspiration Efficiency 174
12.4 Sampling Inlets 176
12.4.1 Sampling Using Thin Walled Probes 176
12.4.2 Sampling Using Blunt Samplers 180
12.4.3 Sampling for Inhalable Aerosols in Workplaces 181
12.4.4 Sampling for Thoracic and Respirable Aerosols
in Workplaces 183
12.4.5 Cascade Impactors 188
12.5 Sample Transport System 188
12.6 Filter Collection 191
12.6.1 Theory of Filtration 191
12.6.2 Filter Selection and Gravimetry 196
12.7 Special Sampling Problems: Vapor Particle Partitioning and
Measurement of Semivolatile Aerosols 197
Chapter 13 Direct Reading Instruments for Aerosols 199
13.1 Introduction 199
13.2 Instruments Based on Inertial Properties of Particles 199
13.3 Instruments Based on Mass Measurements 200
13.4 Instruments Based on Particle Charge Measurement 202
13.5 Condensation Nuclei Counters 205
13.6 Instruments Based on Particle Interactions with Light 206
13.6.1 Light Extinction 208
13.6.2 Calculation of Particle Extinction Efficiency, Qext 210
13.6.3 Light Scattering 212
13.6.4 Light Scattering and Mass Concentration 217
13.6.5 Optical Particle Counters 220
Chapter 14 Sampling for Pollutants of Biological Origin 221
14.1 Introduction 221
14.2 Types of Bioaerosols 222
14.2.1 Pollen 222
14.2.2 Fungi 222
14.2.3 Bacteria 223
14.2.4 Viruses 224
14.2.5 Other Bioaerosols 224
14.3 Bioaerosol Exposure Assessment Strategy 224
14.3.1 Health Surveys 225
14.3.2 Site Characterization 225
14.3.3 Hypothesis Formulation 226
14.3.4 Sampling 226
14.3.5 Analyze Data and Test Hypothesis 227
14.4 Measurement Methods for Bioaerosols 227
14.4.1 Impaction of Bioaerosols onto Agar 228
14.4.2 Impinging of Bioaerosols onto a Liquid 230
14.4.3 Sampling through a Filter 231
14.5 Statistical Issues 231
14.5.1 Lower Limits of Detection 231
14.5.2 Limits of Quantification 232
14.5.3 Upper Limits of Detection 232
SECTION IV Exposure Assessment Strategies. 235
Chapter 15 Variability in Occupational Exposures 237
15.1 Introduction 237
15.2 Environmental Variability and Lognormal Distributions 237
15.3 Sampling and Analytical Variability 243
15.4 Exceedance Fraction 245
15.5 The 95th Percentile 248
15.6 Arithmetic Mean of the Lognormal Distribution 248
15.7 Between and Within Worker Variability 250
15.8 Averaging Time and Exposure Distributions 256
Chapter 16 Occupational Exposure Assessment Strategies 259
16.1 Introduction 259
16.2 Sample Collection 259
16.3 Occupational Exposure Limits 261
16.4 Classification of Workers into Similarly Exposed Groups 263
16.4.1 The Observational Approach 263
16.4.2 The Sampling Approach 264
16.4.3 A Hybrid Approach 265
16.5 Sample Size Requirements — Strategies for Decision Making 266
16.5.1 AIHA Strategy 266
16.5.2 OSHA Strategy 267
16.5.3 Effectiveness and Efficiency of Strategies for Decision Making .269
16.5.4 Comparing the Mean with an OEL 269
16.5.5 Estimating the Mean 271
16.6 Exposure Measurement Error and its Implications for Epidemiology 272
16.6.1 Classical Error Model 273
16.6.2 Berkson Error Model 274
Chapter 17 Exposure Modeling 279
17.1 Role of Modeling in Exposure Assessment 279
17.2 Saturation Vapor Pressure Model 281
17.3 The Well Mixed Room Model 281
17.3.1 Constant Emission Rate 282
17.3.2 Exponentially Decreasing Contaminant Emission Rate 285
17.4 The Near Field Far Field Model 286
17.5 Empirical Exposure Models 290
17.6 Monte Carlo Simulation Analysis in Modeling 292
Chapter 18 Reconstructing Historical Exposures 299
18.1 Introduction 299
18.2 Exposure Reconstruction 300
18.2.1 The Exposure Data Matrix 300
18.2.2 Measurement Errors in Exposures 300
18.2.3 Sparse Data 302
18.2.4 Exposure Variability 304
18.2.5 Imputation of Missing Values by Interpolation
and Extrapolation 305
18.2.6 Using Knowledge of Exposure Modifiers 306
18.2.7 Exposure Models 307
18.2.7.1 Contaminant Generation Models 307
18.2.7.2 Ventilation Box Models 308
18.2.7.3 Worker Time Activity Models 308
18.2.8 Leveraging All Relevant Information — Bayesian Methods 309
18.2.9 Using Expert Judgment along with Deterministic Models 311
18.2.10 Quality of Expert Judgment 314
18.2.11 Validation of Retrospective Exposure Assessment Estimates 315
18.3 Dose Estimation 316
18.3.1 Estimating R(t) 316
18.3.2 Estimating G(t) 320
18.4 Concluding Remarks 321
References 323
Index 331 |
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| id | DE-604.BV021759740 |
| illustrated | Not Illustrated |
| index_date | 2024-07-02T15:34:46Z |
| indexdate | 2024-07-09T20:43:25Z |
| institution | BVB |
| language | English |
| lccn | 2005275575 |
| oai_aleph_id | oai:aleph.bib-bvb.de:BVB01-014972831 |
| oclc_num | 71353210 |
| open_access_boolean | |
| physical | 1 Online-Ressource |
| publishDate | 2005 |
| publishDateSearch | 2005 |
| publishDateSort | 2005 |
| publisher | Taylor & Francis |
| record_format | marc |
| spelling | Occupational exposure assessment for air contaminants Gurumurthy Ramachandran Boca Raton, FL Taylor & Francis 2005 1 Online-Ressource txt rdacontent c rdamedia cr rdacarrier Air Pollution Measurement Industrial hygiene Ramachandran, Gurumurthy Sonstige oth http://www.loc.gov/catdir/enhancements/fy0646/2005275575-d.html Publisher description HBZ Datenaustausch application/pdf http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014972831&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA Inhaltsverzeichnis |
| spellingShingle | Occupational exposure assessment for air contaminants Air Pollution Measurement Industrial hygiene |
| title | Occupational exposure assessment for air contaminants |
| title_auth | Occupational exposure assessment for air contaminants |
| title_exact_search | Occupational exposure assessment for air contaminants |
| title_exact_search_txtP | Occupational exposure assessment for air contaminants |
| title_full | Occupational exposure assessment for air contaminants Gurumurthy Ramachandran |
| title_fullStr | Occupational exposure assessment for air contaminants Gurumurthy Ramachandran |
| title_full_unstemmed | Occupational exposure assessment for air contaminants Gurumurthy Ramachandran |
| title_short | Occupational exposure assessment for air contaminants |
| title_sort | occupational exposure assessment for air contaminants |
| topic | Air Pollution Measurement Industrial hygiene |
| topic_facet | Air Pollution Measurement Industrial hygiene |
| url | http://www.loc.gov/catdir/enhancements/fy0646/2005275575-d.html http://bvbr.bib-bvb.de:8991/F?func=service&doc_library=BVB01&local_base=BVB01&doc_number=014972831&sequence=000002&line_number=0001&func_code=DB_RECORDS&service_type=MEDIA |
| work_keys_str_mv | AT ramachandrangurumurthy occupationalexposureassessmentforaircontaminants |