ield tests were conducted to measure the effects of high concentrations of cement dust on the penetration and pressure drop of N95 electret respirator filters from two manufacturers. Three groups of each manufacturer’s filter were tested: 1) untreated; 2) irradiated with ionizing radiation; 3) dipped in isopropanol for 15 seconds. The purpose of the irradiation and isopropanol treatments was to...

Indium use has increased greatly in the past decade in parallel with the growth of flat-panel displays, touchscreens, optoelectronic devices, and photovoltaic cells. Much of this growth has been in the use of indium tin oxide (ITO). This increased use has resulted in more frequent and intense exposure of workers to indium. Starting with case reports and followed by epidemiological studies, expo...

OBJECTIVES To reanalyze in a similar manner the two principal studies of TCDD (tetrachlorodibenzo-p-dioxin) and diabetes in an attempt to reconcile disparate results. METHODS Data from 990 United States Air Force veterans (Ranch Hand) and 1275 referents were reanalyzed, and a NIOSH population of 267 chemical workers and 227 referents. The Ranch Hand veterans had lower concentrations of lipid ...

his study was done to assess performance of four Class 95 respirator filters exposed to diesel engine exhaust. NIOSH-certified electret filters from two manufacturers were used. N95 filters from each manufacturer were tested. P95 and R95 filters from Manufacturer X and Y, respectively, were also tested. Only R and P series filters are typically recommended for diesel exposures. Prior to diesel ...

This research aims to evaluate the egg-laying chicken feeder that was designed at farm small and medium enterprise (SME). The main reason of this tool design due worker’s complain feeling pain during feeding process. Evaluation performed based on Nordic Body Map questionnaire result, physiological workload, NIOSH lifting equation calculation. observed work ranged from feed filling in basket unt...

In March 2007, the National Institute for Occupational Safety and Health (NIOSH) was asked to evaluate the noise exposure of employees in the Nutrition and Food Services Department of a large hospital, because of noise concerns raised after the installation of the PowerSoak dishwashing system. Eleven employees (two cooks, eight food service workers, and a materials handler) contributed 13 full-...

Foreword It is my privilege to write these introductory comments on the Proceedings ofthe Workshop/Con-ference on the Role of Metals in Carcinogenesis. The field of metal carcinogenicity, although not new, has moved into an area of even greater prominence and urgency. We of the National Institute for Occupational Safety and Health (NIOSH), and its sister institutes, the National Cancer Institut...

To document more fully the applicability of the air monitoring data used in the site profile, NIOSH will add a section to the profile to address the quality, reliability and applicability of the early Atomic Energy Commission (AEC) air sampling program to the estimation of worker doses. Further, NIOSH will discuss how these measurements were consistent with the recommendations provided in ICRP ...

Thermal–optical analysis (TOA) is a widely used technique that fractionates carbonaceous aerosol particles into organic and elemental carbon (OC and EC), or carbonate. Thermal sub-fractions of evolved OC and EC are also used for source identification and apportionment; thus, oven temperature accuracy during TOA analysis is essential. Evidence now indicates that the “actual” sample (filter) temp...