Electrochromic Materials Containing Pyridinium Salt and Benzoate Moieties with Dual-Colored and Long-Life Performance
In: SOLMAT-D-21-01828
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In: SOLMAT-D-21-01828
SSRN
In: Sociobiology: an international journal on social insects, Band 67, Heft 1, S. 41
This paper studied the fumigating activity of Litsea cubeba oil and citral on Solenopsis invicta, identified and analyzed the chemical constituents and volatile components of L. cubeba oil via solid-phase microextraction which were then identified via gas chromatography-mass spectrometry. The results showed that citral and (z)-3,7-dimethylocta-2,6-diena were the main components of L. cubeba oil, as well as its volatile compounds. According to the experimental results, L. cubeba oil and citral had good fumigating activity on workers, and also had significant inhibition on the walking ability and climbing ability of workers. At the same time, the effects of the two agentia on the fumigating activity and behavioral inhibition of microergate were stronger than those of macroergate. After treating with L. cubeba oil and citral for 24 hours, the walking rate and grasping rate of microergate were both 0 %. The results showed that L. cubeba oil and citral had good control effect on S. invicta.
In: STOTEN-D-22-08315
SSRN
In: Annals of work exposures and health: addressing the cause and control of work-related illness and injury, Band 68, Heft Supplement_1, S. 1-1
ISSN: 2398-7316
Abstract
Exposure assessment is a core component of regulatory quantitative risk assessment and plays a central role in risk management. Ideally, personal exposure measurements are collected using techniques that record an individual's direct exposures. Though this type of data is preferred, it is often lacking. In this study, we tested whether a robot could be programmed to simulate human use of spray products and then used in place of human subjects for generating air concentration data.
A robot was programmed to simulate human use of a fabric crafts protector (FCP) and a glass cleaning (GC) product. While the robot used these products, air sampling data was collected to estimate VOC concentrations. The sampling data was summarized and then compared to air concentration data found in the literature while humans used similar products.
In this study we successfully programmed a robot to mimic human use of two spray products. Average VOC concentrations were 1.57 ppm for FCP spraying and 0.17 ppm for GC spraying and wiping. Air sampling data were found to be within the range of data reported in the literature.
This study demonstrates the ability to use robots to simulate human exposures. It offers a systematic, efficient method for generating exposure data where gaps exist. This data can be used to validate or enhance models and improve health and safety risk assessments used for public health protection.
In: Annals of work exposures and health: addressing the cause and control of work-related illness and injury, Band 67, Heft 8, S. 979-989
ISSN: 2398-7316
Abstract
There is an increasing need for exposure data to enable more precise information for risk estimates and improved public health protection. While personal monitoring data are preferred, it is often difficult to collect due to the resources needed to complete a human research study. In this study, we successfully programmed a robotic arm to mimic human use (spraying) of a fabric crafts protector (FCP) and human cleaning (spraying and wiping) of a glass pane with glass cleaner (GC). The robot was then used in place of human subjects to assess inhalation exposures to volatile organic compounds (VOCs) during the use of the FCP and GC. Air sampling data were collected while the robot used the products to estimate personal exposures to VOCs. Average VOC concentrations were 1.57 ppm for FCP spraying and 0.17 ppm for GC spraying and wiping. During FCP spraying, average acetone concentrations were 0.88 ppm and average isopropyl alcohol concentrations were 0.26 ppm. During GC spraying and wiping, average 2-butoxyethanol concentrations were 0.15 ppm. Air sampling data were found to be within the range of data reported in the literature during human use of similar glass cleaning products. No data was found in the literature during use of fabric protector spray products. This study contributes exposure measurement data with detailed contextual information to help characterize inhalation exposures during the use of 2 spray products. In addition, the study offers a systematic, efficient method for generating exposure data which can be used to improve health and safety risk assessments used for public health protection.
The European Solvents Industry Group (ESIG) Generic Exposure Scenario (GES) Risk and Exposure Tool (EGRET) was developed to facilitate the safety evaluation of consumer uses of solvents, as required by the European Union Registration, Evaluation and Authorization of Chemicals (REACH) Regulation. This exposure-based risk assessment tool provides estimates of both exposure and risk characterization ratios for consumer uses. It builds upon the consumer portion of the European Center for Ecotoxicology and Toxicology of Chemicals (ECETOC) Targeted Risk Assessment (TRA) tool by implementing refinements described in ECETOC TR107. Technical enhancements included the use of additional data to refine scenario defaults and the ability to include additional parameters in exposure calculations. Scenarios were also added to cover all frequently encountered consumer uses of solvents. The TRA tool structure was modified to automatically determine conditions necessary for safe use. EGRET reports results using specific standard phrases in a format consistent with REACH exposure scenario guidance, in order that the outputs can be readily assimilated within safety data sheets and similar information technology systems. Evaluation of tool predictions for a range of commonly encountered consumer uses of solvents found it provides reasonable yet still conservative exposure estimates.
BASE
In: STOTEN-D-22-03552
SSRN
In: Air quality, atmosphere and health: an international journal, Band 16, Heft 8, S. 1571-1586
ISSN: 1873-9326