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22 results for “ethylene glycol”
Thermal conductivity of ethylene glycol at various temperatures
<p><strong>Thermal conductivity of ethylene glycol at various temperatures</strong></p> <p>Junjie Chen</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p> </p> <p>Ethylene glycol is mainly used for two purposes, as a raw material in the manufacture of polyester fibers and for antifreeze formulations. It is an odorless, colorless, flammable, viscous liquid. Ethylene glycol has a sweet taste, but it is toxic in high concentrations. Ethylene glycol is produced from ethylene, via the intermediate ethylene oxide. Ethylene oxide reacts with water to produce ethylene glycol. This reaction can be catalyzed by either acids or bases, or can occur at neutral pH under elevated temperatures. The highest yields of ethylene glycol occur at acidic or neutral pH with a large excess of water. Under these conditions, ethylene glycol yields of 90 percent can be achieved. The major byproducts are the oligomers diethylene glycol, triethylene glycol, and tetraethylene glycol. The separation of these oligomers and water is energy-intensive. Because the methanol is recycled, only carbon monoxide, hydrogen, and oxygen are consumed. The major use of ethylene glycol is as an antifreeze agent in the coolant in for example, automobiles and air-conditioning systems that either place the chiller or air handlers outside or must cool below the freezing temperature of water. In geothermal heating and cooling systems, ethylene glycol is the fluid that transports heat through the use of a geothermal heat pump. The ethylene glycol either gains energy from the source or dissipates heat to the sink, depending on whether the system is being used for heating or cooling. Pure ethylene glycol has a specific heat capacity about one half that of water. So, while providing freeze protection and an increased boiling point, ethylene glycol lowers the specific heat capacity of water mixtures relative to pure water. The freezing point depression of some mixtures can be explained as a colligative property of solutions but, in highly concentrated mixtures such as the example, deviations from ideal solution behavior are expected due to the influence of intermolecular forces. It's important to note that though pure and distilled water will have a greater specific heat capacity than any mixture of antifreeze and water, commercial antifreezes also typically contain an anti-corrosive additive to prevent pure water from corroding coolant passages in the engine block, cylinder heads, water pump and radiator. There is a difference in the mixing ratio, depending on whether it is ethylene glycol or propylene glycol. The use of ethylene glycol not only depresses the freezing point of aqueous mixtures, but also elevates their boiling point. This results in the operating temperature range for heat-transfer fluids being broadened on both ends of the temperature scale. The increase in boiling temperature is due to pure ethylene glycol having a much higher boiling point and lower vapor pressure than pure water, as is typical with most binary mixtures of volatile liquids. In the plastic industry, ethylene glycol is an important precursor to polyester fibers and resins. Polyethylene terephthalate, used to make plastic bottles for soft drinks, is prepared from ethylene glycol. Ethylene glycol is used in the natural gas industry to remove water vapor from natural gas before further processing.</p> <p> </p> <p>Thermodynamic temperature (degrees kelvin), Thermal conductivity (watts per meter-kelvin)</p> <p>0.2549 280</p> <p>0.2563 290</p> <p>0.2576 300</p> <p>0.259 310</p> <p>0.2603 320</p> <p>0.2616 330</p> <p>0.263 340</p> <p>0.2643 350</p> <p>0.2645 288.15</p> <p>0.2609 293.15</p> <p>0.2695 353.15</p>
Selective Lactic Acid Synthesis via Ethylene Glycol Electrooxidation in Borate Buffer
<p>dataset for the corresponding publication in ChemComm</p>
A pH-responsive amphiphilic hydrogel based on pseudo-peptides and poly(ethylene glycol) for oral drug delivery
<p>The original data for the paper titled "A pH-responsive amphiphilic hydrogel based on pseudo-peptides and poly(ethylene glycol) for oral drug delivery"</p>
Hyponatremia Due to Poly Ethylene Glycol (PEG)
ClinicalTrials.gov study NCT03787888. IPD Sharing: Not stated. Countries: 1. Publications: 2.
Poly(Ethylene Glycol)(PEG)-Asparaginase During Two Treatment Courses
ClinicalTrials.gov study NCT00192673. IPD Sharing: Not stated. Countries: 1. Publications: 1.
Effect of Activated Charcoal on Serum Osmolality, Osmolal Gap, and Enzymatic Ethylene Glycol Assay
ClinicalTrials.gov study NCT07220031. IPD Sharing: UNDECIDED. Countries: 1. Publications: 5.
Ethylene glycol assisted 3D floral evolution of BiFeO3-based nanostructures with effective magneto-electric response
<p>Controlled growth of nanostructures plays a vital role in tuning the physical and chemical properties of functional materials for advanced energy and memory storage devices. Herein, we synthesized hierarchical micro-sized flowers, built by the self-assembly of highly crystalline, 2-dimensional nanoplates of Co and Ni doped BiFeO<sub>3</sub>, using a simple ethylene glycol mediated solvothermal method. Pure BiFeO<sub>3</sub> attained scattered one-dimensional nanorods-type morphology having diameter nearly 60 nm. Co-doping of Co and Ni at Fe-site in BiFeO<sub>3</sub> does not destabilize the morphology; rather it generates 3-dimensinal floral patterns of self-assembled nanoplates. Unsaturated polarization loops obtained for BiFeO<sub>3</sub> confirmed the leakage behavior of these rhombohedrally distorted cubic perovskites. These loops were then utilized to determine the energy density of the BiFeO<sub>3</sub> perovskites. Enhanced ferromagnetic behavior with high coercivity and remanence was observed for these nanoplates. A detailed discussion about the origin of ferromagnetic behavior based on Goodenough-Kanamori's rule is also a part of this paper. Impedance spectroscopy revealed a true Warburg capacitive behavior of the synthesized nanoplates. High magneto-electric coefficient of 27 mV/cm.Oe at a bias field of -0.2 Oe was observed which confirmed the existence of magneto-electric coupling in these nanoplates.</p>
SnO2 reduction in ethylene glycol
<a href="https://spectroscopyhub.com/measurements/data-collection/8518ae70-ac56-4e70-a993-e0614cf9f836">SnO2 reduction in ethylene glycol</a>
Data from: Small RNAs in rat sperm are a predictive and sensitive biomarker of exposure to the testicular toxicant ethylene glycol monomethyl ether.
Testicular histology and semen parameters are considered the gold standards when determining male reproductive toxicity. Ethylene glycol monomethyl ether (EGME) is a testicular toxicant with well-described effects on histopathology and sperm parameters. To compare the predictivity and sensitivity of molecular biomarkers of testicular toxicity to the traditional endpoints, small RNAs in the sperm were analyzed by next generation RNA-sequencing (RNA-seq). Adult rats were exposed to 0, 50, 60, or 75 mg/kg EGME by oral gavage for 5 consecutive days. Testis histology, epididymal sperm motility and sperm small RNAs, including microRNAs (miRNAs), mRNA fragments, piwi-associated RNAs (piRNAs), and tRNA fragments (tRFs), were analyzed 5 weeks after cessation of exposure. Testicular histology showed a significant dose-dependent increase in retained spermatid heads (RSH), while sperm motility declined with increasing dose. RNA-seq of sperm small RNAs was used to identify significant dose-dependent changes in percent mRNA fragments (of total reads), percent miRNAs (of total reads), average tRF length, average piRNA length, and piRNA and tRF length-distributions. Discriminant analysis showed relatively low predictivity of treatment based on RSH or motility compared to the average read length of all aligned RNAs. Benchmark dose (BMD) modeling resulted in a BMD of 62 mg/kg using RSH, whereas average read length of all aligned RNAs resulted in a BMD of 47 mg/kg. These results showed that sperm small RNAs are sensitive and predictive biomarkers of EGME-induced male reproductive toxicity.
Ultrasonic Assisted Extraction of Artemisinin from Artemisia Annua L. Using Poly(Ethylene Glycol): Toward a Greener Process
<p>Supplementary Materials</p>
Data from: The effect of ethylene glycol on pore arrangement of anodic aluminum oxide prepared by hard anodization
The influence of ethylene glycol (EG) addition on pore self-ordering process in anodic aluminum oxide (AAO) membranes prepared by hard anodization (HA) was investigated. It was illustrated that EG has a substantial effect on the pore arrangement of AAO, which revealed that a smaller pore size can be obtained as EG concentration reaching 20 wt% in aqueous electrolyte. The number of estimated defects of AAO increase significantly with additive EG concentration at 50 wt%. Excellent ordering pore was realized when the samples were anodized in the 30 wt%-EG-containing aqueous electrolyte.electrolyte. The number of estimated defects of AAO increases significantly upon the added EG concentration reaching 50wt%. Excellent ordering pore was achieved when the samples were anodized in a 30wt%-EG-containing aqueous electrolyte.
A Pyrrolidine Functionalized Poly[(ethylene glycol) Methacrylate] Resin as a Heterogeneous Catalyst for Aqueous Aldol Reactions
<p>This repository includes experimental data associated with the following publication: Biesemans, B.; Aljammal, N.; Radhakrishnan, S.; Breynaert, E.; Stevens, C.V.; Lauwaert, J.; Thybaut, J.W. A Pyrrolidine Functionalized Poly[(ethylene glycol) Methacrylate] Resin as a Heterogeneous Catalyst for Aqueous Aldol Reactions. Catalysts 2022, 12, 1389. https://doi.org/10.3390/catal12111389<br> In this study, a pyrrolidine group (AMP) was functionalized on a polymer resin (PEGMA). The synthesis procedure consists of suspension polymerization of the PEGMA resin, introduction of Cl groups (PEGMA-Cl), substitution of Cl groups by Boc-protected pyrrolidine groups (PEGMA-AMP-Boc) and deprotection of the pyrrolidine active sites (PEGMA-AMP). Three batches of PEGMA-AMP catalyst were synthesized with different loadings:<br> - PEGMA-AMP-1 with 0.054 mmol amines/g catalyst;<br> - PEGMA-AMP-2 with 0.190 mmol amines/g catalyst;<br> - PEGMA-AMP-3 with 0.270 mmol amines/g catalyst.</p> <p><br> The resulting PEGMA-AMP catalyst was characterized by <sup>1</sup>H- and <sup>13</sup>C-NMR, FTIR, Elemental Analysis, and a swelling assessment. The catalyst was furthermore assessed as aldol condensation catalyst in the aldol condensation of 4-nitrobenzaldehyde with acetone at 55 °C in a 50/50 vol% mixture of either acetone/water or acetone/n-hexane. The resulting data is presented in the article in both figures and tables.</p> <p>The <sup>1</sup>H- and <sup>13</sup>C-NMR data are available via https://dataverse.harvard.edu/dataset.xhtml?persistentId=doi:10.7910/DVN/YQ4FYJ</p>
Data from: Small RNAs in rat sperm are a predictive and sensitive biomarker of exposure to the testicular toxicant ethylene glycol monomethyl ether.
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Data from: The effect of ethylene glycol on pore arrangement of anodic aluminum oxide prepared by hard anodization
Open the record for dataset details and reuse information.
Ethylene glycol assisted 3D floral evolution of BiFeO3-based nanostructures with effective magneto-electric response
Open the record for dataset details and reuse information.
The catabolism of ethylene glycol by Rhodococcus jostii RHA1 and its dependence on mycofactocin
GEO Series GSE261336. Rhodococcus jostii. 12 samples. Type: Expression profiling by high throughput sequencing.
Rat sperm small RNA following exposure to ethylene glycol monomethyl ether
GEO Series GSE313131. Rattus norvegicus. 39 samples. Type: Non-coding RNA profiling by high throughput sequencing.
Pico-Salax Versus Poly-Ethylene Glycol for Bowel Cleanout Before Colonoscopy in Children
ClinicalTrials.gov study NCT00380497. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Insights on cryoprotectant toxicity from gene expression profiling of endothelial cells exposed to ethylene glycol
GEO Series GSE67511. Homo sapiens. 18 samples. Type: Expression profiling by array.
A Comparative Transcriptomics Analysis Reveals Ethylene Glycol Derivatives of Squalene Ameliorate Excessive Lipogenesis and Inflammatory Response in 3T3-L1 preadipocytes cells
GEO Series GSE224049. Mus musculus. 12 samples. Type: Expression profiling by array.
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