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Princeton, NJ, United States

Passman F.J.,Biodeterioration Control Associates, inc. | Kuenzi P.,Blaser Swisslube
International Biodeterioration and Biodegradation | Year: 2015

A new variation of a method for quantifying cellular adenosine triphosphate (cATP) is described. The variation permits differentiation between cATP from bacteria and cATP from fungi. This paper describes the process by which the new differential cATP method was developed and validate in both laboratory and field tests. Laboratory tests using bacteria, yeasts and filamentous fungi demonstrated that cATP observed in ≥5 μm and <5 μm size-fractions, respectively were consistently within ±10% of predicted concentrations. The field evaluation during which four participating metalworking fluid (MWF) compounders collectively tested <250 used MWF samples, confirmed that the differential protocol reliably detected fungal contamination when it was present. © 2015 Elsevier Ltd. Source


Passman F.J.,Biodeterioration Control Associates, inc.
Tribology and Lubrication Technology | Year: 2012

During the past decade we have witnessed a tumultuous debate over the disease risks posed by microbes that inhabit metalworking fluid (MWF) systems. Not infrequently, that debate has occurred in the absence of satisfactory data. This paper addresses the author's perspective on what types of data are needed in order to assess the actual disease risks posed by MWF microbes. The approach must be multidisciplinary and coordinated, including stakeholders with expertise in epidemiology, fluid management, immunology, industrial hygiene, microbiology, and public health medicine. Traditional microbiological sampling and test methods must be augmented by new, consensus methods that are adopted by industry stakeholders. Entities performing these tests should be participating in interlaboratory cross-check programs. The author will use Mycobacterium immunogenum to illustrate the general model for this strategy. Source


Passman F.J.,Biodeterioration Control Associates, inc.
13th International Conference on Stability, Handling and Use of Liquid Fuels 2013 | Year: 2013

There are several challenges associated with the use of microbioslogical parameters as fuel quality criteria. Microbes proliferate only where there is sufficient free-water to support metabolic activity. Consequently, microbes are most often detected in fuel-associated water rather than fuel itself. Samples well suited for testing other fuel quality parameters are generally inappropriate for microbiological examination. Distribution of microbes is typically quite heterogeneous. Consequently, variability among replicate samples from the same source can be sufficient to lead to different conclusions regarding the need for corrective action. Notwithstanding these challenges, microbiological test data provide useful information about microbial contamination in fuels and fuel systems. Understanding the factors contributing to data variability and bias provides users for these data with the perspective needed to interpret them objectively and accurately. In 2012, ASTM approved D7847 Guide for Interlaboratory Studies for Microbiological Test Methods. This paper reviews the primary issues addressed by D7847. © (2013) by IASH. All rights reserved. Source


Passman F.J.,Biodeterioration Control Associates, inc.
International Biodeterioration and Biodegradation | Year: 2013

Although the documentation of fuel biodeterioration dates back to the late 19th century, general recognition of the value of microbial contamination control evolved slowly until the 1980s. Since the early 1980s a number of factors have converged to stimulate greater interest in fuel and fuel system biodeterioration. This, in turn, has stimulated applied research in the ecology of biodeteriogenic processes and biodeterioration control. This presentation reviews progress in both of these areas since 1980. The aforementioned factors that have provided the impetus for improved microbial control, the evolution of our understanding of the nature of the biodeteriogenic processes will be discussed. Activities of consensus organizations to develop guidelines and practices will also be reviewed. © 2012 Elsevier Ltd. Source


Passman F.J.,Biodeterioration Control Associates, inc.
Tribology and Lubrication Technology | Year: 2010

Countries have regulated the use of microbicide to control microbial contamination in fluid-blending systems during in-drum storage. The EPA in the US has administered pesticide regulations that led to a significant effect on both the variety of active ingredients and number of microbicide manufacturers in the MWF industry. European Union implementation of the Biocidal Products Directive (BPD) and REACH has influenced the regulatory atmosphere for MWF microbicides. One of the major implications of REACH is that it might require essentially the same environmental persistence and toxicological data as currently required under the BDP for all chemicals sold into or manufactured within the EU. The US EPA registration review for hexahydro-1,3,5-tris(2- hydroxyethyl)-s-triazine (HTHT) likely to require HTHT manufacturers to submit new data for the complete battery of acute, sub-chronic and chronic toxicity tests (estimated cost $4 million). Source

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