respirator Articles
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Soil Sieving Study Examines Artifacts in Respiration, SLAN, VAST
A recent paper examines how soil sieving for proficiency samples affects soil health test parameters. The work, a collaboration of Brinton and the Utah State PSC appears in the international peer-reviewed Agriculture Research and Technology Journal. A focus of the study was if CO2 respiration would be influenced by sieving finer than 2 mm. The paper reflects a concern first raised by Brinton in ...
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Increased respiration in the sch9 mutant is required for increasing chronological life span but not replicative life span
Loss of the protein kinase Sch9p increases both the chronological life span (CLS) and the replicative life span (RLS) of Saccharomyces cerevisiae by mimicking calorie restriction, but the physiological consequences of SCH9 deletion are poorly understood. By transcriptional profiling of an sch9 mutant, we show that mitochondrial electron transport chain genes are upregulated. Accordingly, protein ...
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Effects of road deicer (NACL) and amphibian grazers on detritus processing in pond mesocosms
Road deicers have been identified as potential stressors in aquatic habitats throughout the United States and we know little regarding associated impacts to ecosystem function. A critical component of ecosystem function that has not previously been evaluated with respect to freshwater salinization is the impact on organic matter breakdown. The purpose of this study was to evaluate cumulative ...
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Effect of hyperbaric treatment on respiration rates and quality attributes of sweet corn
Effects of three–day hyperbaric and low temperature treatment on the respiration rates and quality attributes of sweet corn were studied. Quality attributes were also monitored over four days of storage at ambient conditions. Best results were obtained from cold storage at 0°C, but hyperbaric treatment showed positive effects on quality retention of sweet corn. An inverse relationship was ...
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Application of advanced Respirometry in the Nitrification assessment for different levels of Temperature, pH and Oxygen
For a determined substrate concentration, the most significant environmental factors are temperature, pH and oxygen availability. The well known critical influence of those factors on the nitrification are here analyzed by making use of a specific software and advanced respirometry based on a dynamic LFS system, where the test conditions can be set in the corresponding test-settings board and ...
By SURCIS, S.L.
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Application of advanced Respirometry in the Nitrification assessment for different levels of Temperature, pH and Oxygen
Abstract Environmental factors control the rate of nitrification. For a determined substrate concentration, the most significant environmental factors are temperature, pH and oxygen availability. The well known critical influence of those factors on the nitrification are here analyzed by making use of a specific software and advanced respirometry based on a dynamic LFS system, where the test ...
By SURCIS, S.L.
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Common Mistakes in Compliance with OSHA Standard for Respiratory Protection
Year after year, citations for violations of the Respiratory Standard 1910.134 consistently remain in the TOP 5 most cited OSHA violations. Don’t kid yourself, respiratory protection is a complex subject. You cannot just arbitrarily decide that “it looks dusty out there, I guess I will have the workers wear dust masks.” Here are some of the most common mistakes made by ...
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Pandemic preparedness - Respiratory protection 101
Has the recent media coverage regarding the spread of the H1N1 virus caused your organization to reconsider whether you need a respiratory protection plan for your employees? If so, you’re not alone. David Lahoda, Managing Editor of OSHA Watch and contributor to OSHA Healthcare Advisor, recently blogged on the wake-up call many of us have received as we rush to get our respiratory protection ...
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Effect of vinyl wrapping on the quality and chilling susceptibility of small grade okra (Abelmoschus esculentus [L.] Moench.) pods during low temperature storage
The effect of vinyl wrapping on the quality and chilling susceptibility of small-grade okra (Abelmoschus esculentus [L.] Moench.) was studied with the aim of improving storage. Pods that were stored in the air at 2-10°C rapidly dehydrated and quality decreased within two to four days. At 2°C, chilling injury was observed after four days. Pods enclosed in vinyl stored satisfactorily for ...
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Effect of vinyl wrapping on the quality and chilling susceptibility of small grade okra ( Abelmoschus esculentus [L.] Moench.) pods during low temperature storage
The effect of vinyl wrapping on the quality and chilling susceptibility of small-grade okra ( Abelmoschus esculentus [L.] Moench.) was studied with the aim of improving storage. Pods that were stored in the air at 2–10°C rapidly dehydrated and quality decreased within two to four days. At 2°C, chilling injury was observed after four days. Pods enclosed in vinyl stored satisfactorily for ten ...
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Effects of meteorological conditions on concentration of air pollutants in Delhi
Air pollution in Delhi is a serious environmental problem. In this paper, the effects of meteorological conditions on local air quality are quantitatively assessed by determining the relationships between concentrations of Suspended Particulate Matter (SPM), Respirable Suspended Particulate Matter (RSPM), sulphur dioxide (SO2) and nitrogen dioxide (NO2) with meteorological parameters on monthly ...
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Exergetic efficiency of ATP production in neuronal glucose metabolism
The exergetic efficiency of ATP production in the brain is assessed using two competing models: 1) the classical model, where both neuron and the astrocyte metabolise glucose; 2) the astrocyte–neuron lactate shuttle hypothesis (ANLSH), where astrocytes metabolise glucose to lactate, then shuttle it to the neuron for aerobic respiration. Exergy analyses showed that ATP production in neuronal ...
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Evaluation of occupational exposure to aerosol emitted from die sinking electrical discharge machining process
Emission of toxic gases and aerosols is a critical occupational threat in the die sinking Electrical Discharge Machining (EDM) process. The present study is focused on the concentration of aerosols in the breathing zone of the EDM operator at various process parameters. Peak current, pulse duration, dielectric level and flushing pressure were the process parameters considered in this study, and ...
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Security for the elderly
Customer: Emfit Ltd. Challenge: Increasing the comfort and security of senior housing. Solution: VTT helped Emfit Ltd. to develop Emfit films, sensors that are fitted on the floor at home to provide information on the occupant’s movements. Their function is based on elastic structure and electrical charge, which make the film react to external changes in mechanical pressure. Key benefits: ...
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Assessment of the endogenous respiration rate and the observed biomass yield for methanol-fed denitrifying bacteria under anoxic and aerobic conditions
In this study, the endogenous respiration rate and the observed biomass yield of denitrifying methylotrophic biomass were estimated through measuring changes in denitrification rates (DNR) as a result of maintaining the biomass under methanol deprived conditions. For this purpose, activated sludge biomass from a full-scale wastewater treatment plant was kept in 10-L batch reactors for 8 days ...
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9 Things Your Respiratory Protection Program Must Include
Osha Respiratory Protection Standard The OSHA Respiratory Protection Standard 29 CFR 1910.134 has many requirements in addition to respirator fit testing. If respirators are worn by any employees, companies must have a written Respiratory Protection Program. The one exception is if the only respirators in use are those voluntarily worn by employees, then a written program is not required. But ...
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Comparison of the performance of statistical models that predict soil respiration from forests
Soil respiration (Rs) is an important source of CO2 to the atmosphere, yet understanding the processes controlling the combined autotrophic and heterotrophic components has proven challenging. Numerous statistical models have been developed to explain Rs as a function of physical and chemical conditions, but there has been little effort to systematically evaluate and compare the performance of ...
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Laboratory test system to measure microbial respiration rate
This study reports a sensible, accurate and economic method for continuous measuring microbial respiration. The measuring principle is an open system, with a continuous air-flow through. Evolved CO2 is absorbed and precipitated as carbonate by a Ba(OH)2 solution, causing a stoichiometrical decrease in ionic strength of the solution and in electrical conductivity. Conductivity and Ba(OH)2 ...
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Biogeochemistry of an Iron-Rich Hypersaline Microbial Mat (Camargue, France)
In situ microsensor measurements were combined with biogeochemical methods to determine oxygen, sulfur, and carbon cycling in microbial mats growing in a solar saltern (Salin-de-Giraud, France). Sulfate reduction rates closely followed the daily temperature changes and were highest during the day at 25°C and lowest during the night at 11°C, most probably fueled by direct substrate interactions ...
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Using a Gas Liquid Porometer to Reliably Measure Pore Size and Distribution for Filter Media Used in Face Masks
Surgical masks and respirators are typically made of nonwoven polypropylene fabric and mostly consist of three (or more) layers. The first and third layers are generally spunbond, while the middle layer is meltblown. This composition is commonly referred to as SMS technology (Spunbond/Meltblown/Spunbond). Three layers of respirator fabric While the efficiency of face masks is measured by ...
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