respirator Articles
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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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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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Response of soil microbial activity to temperature, moisture, and litter leaching on a wetland transect during seasonal refilling
In nutrient impoverished landscapes in southwest Australia, terrestrial litter appears to be important in phosphorus (P) turnover and in the gradual accumulation of P in wetland systems. Little is known about the fate of P leached from litter during the wet season and the associated effects of soil microclimate on microbial activity. The effects of temperature, moisture, and litter leaching on ...
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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 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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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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Impact of high nighttime temperature on respiration, membrane stability, antioxidant capacity, and yield of rice plants
Nighttime temperature is one of the major environmental factors influencing plant metabolic processes. The respiration rates, membrane thermal stability (MTS), and total antioxidant capacities of leaves were investigated in rice (Oryza sativa L.) plants when exposed to high nighttime temperature (HNT) (32°C) or ambient nighttime temperature (ANT) (27°C), and with or without potential preventive ...
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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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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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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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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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Occupational Airborne Hazards and the Importance of Proper Respiratory Protection
Each year, the United States Occupational Safety and Health Administration (OSHA) publishes a preliminary list of the 10 most frequently cited safety and health violations for the fiscal year. It is comprised and compiled from thousands of workplace inspections conducted by federal OSHA staff from across the country. Most years, one of the top 10 cited violations involves respiratory ...
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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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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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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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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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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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Comparison between inhibitor and uncoupler for minimizing excess sludge production of an activated sludge process
In order to study the minimization of excess sludge production, the reduction in the excess sludge production in the presence of an inhibitor and uncoupler was studied in this work. The experimental results show that such an addition could effectively reduce the production of excess sludge. With the energy uncoupling model established in this work, energy uncoupling coefficient (E u) was used to ...
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Improving the sensitivity of the activated sludge respiration inhibition test and verifying the results using an oxidation-reduction potential electrode
The inhibition of activated sludge respiration is one of the most important parameters for monitoring wastewater toxicity. The main objective of this study was to improve respiration inhibition testing in order to protect the biological degradation within the aerobic process in a wastewater treatment plant more efficiently. In order to influence the sensitivity of the testing bacteria, two ...
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