Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"bisphenols"”.
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Zebrafish as a Model for Studying Estrogen Signaling and Estrogenic Endocrine Disruption
… estrogenic and anti-estrogenic effects of ten bisphenols were assessed using zebrafish larvae. Selected estrogen-responsive genes identified from transcriptome analysis were tested in wild-type zebrafish larvae exposed to these bisphenols. Transgenic reporter fish Tg(5xERE:GFP) were used to …
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Impacts of prenatal phthalate and bisphenol exposure on infant cognition and early language development
… to endocrine disrupting chemicals including bisphenols and phthalates are a growing public health concern. Bisphenols and phthalates are used in plastic consumer products, food and drink packaging and containers, personal care and household products, medical supplies, and building supplies. …
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Synthesis and Thermal Characterization of a Series of Copolyesters Synthesized from Terephthaloyl Chloride, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and Bisphenol A, AF, F, and HPF
… replace or use along with rigid aromatic dials. Bisphenols A, AF, F, and HPF have also been used as the aforementioned aromatic dials due to their common industrial use. Copolymers of CBDO, terephthaloyl chloride, and the various bisphenols were synthesized and characterized for structure and …
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Synthesis and Photopolymerization of Novel Dimethacrylates
… step was propoxylation or ethoxylation of the bisphenols and the second step was the methacrylation of the resulting products. The core structures are designated by Bis-A for isopropylidene and 6F for hexafluoropropyl. The side chain structures were designated on the basis of the pendant side …
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Synthesis and Characterization of Phosphorus Containing Poly(arylene ether)s
… containing activated aromatic dihalides and bisphenols were synthesized in high purity. These monomers were successfully polymerized via nucleophilic aromatic substitution to afford high molecular weight polymers. It was determined that by incorporating the phosphine oxide moiety into the …
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Synthesis and characterization of vanillyl alcohol based thermosetting epoxy resins
… chemical for the production of renewable bisphenols and epoxy thermosets. A new bio-based bisphenol (bisguaiacol) was synthesized via electrophilic aromatic condensation of vanillyl alcohol and guaiacol, from which diglycidyl ether of bisguaiacol (DGEBG) was prepared via epoxidation with …
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Synthesis and Characterization of Hydrophilic-Hydrophobic Disulfonated Poly(Arylene Ether Sulfone)-Decafluoro Biphenyl Based Poly(Arylene Ether) Multiblock Copolymers for Proton Exchange Membranes (PEMs)
… on decafluoro biphenyl (excess) and various bisphenols. The copolymers were obtained in high molecular weights and were solvent cast into tough membranes, which had nanophase separated hydrophilic and hydrophobic regions. The performance and structure-property relationships of these materials …
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Effect of Backbone Structure on Membrane Properties for Poly(arylene ether) Random and Multiblock Copolymers
… with a series of increasing hydrophobicity bisphenols. Addition of benzylic methyl groups on the bisphenols, was the method undertaken to increase the hydrophobicity. The combination of reduced fluorine content along with the addition of methyl groups resulted in multiblock copolymers with …
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Synthesis and characterization of poly(arylene ethers) and functionalized oligomers
… this technique may be also utilized with other bisphenols. The synthesis and characterization of a wide variety of derivatives of these functionally terminated oligomers was demonstrated. A number of potential post reactions involving these oligomeric diamines were investigated and synthetic …
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Synthesis and characterization of phosphorus containing poly(arylene ether) systems
… nucleophilic displacement reaction with aromatic bisphenols in the presence of potassium carbonate and dipolar aprotic solvents. The resulting poly (arylene ether phosphine oxide) s had glass transition temperatures ranging from 195 to 285°C depending on the rigidity of the bisphenol and the …
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Synthesis and Characterization of Highly Functional Substituted Stilbene Copolymers and Semi-crystalline Poly(aryl ether sulfone)s
… to these amorphous polymers. Three bisphenols, 4, 4′-isopropylidenediphenol, 4, 4′-(hexafluoroisopropylidene)diphenol and 4,4′-dihydroxybiphenyl have been copolymerized with DHTP and dichlorodiphenylsulfone. Only the segmented polysulfone containing 50% BP and 50% DHTP was …
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Advanced Polymeric Membranes and Multi-Layered Films for Gas Separation and Capacitors
… was compared. Two of the polymers had symmetric bisphenols while the remaining two had asymmetric bisphenols. Two contained trifluoromethyl groups while the other two had methyl groups. The symmetric polymers had Tg's of approximately 160 °C while the asymmetric polymers showed higher Tg's near …
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Chemical Mixtures of Xenoestrogens and Their Metabolites Alter Estradiol-Induced Non-Genomic Signaling
… attenuated 1nM E2 responses. While individual bisphenols did not activate JNK as NP did, the combination of all XEs with E2 generated an enhanced non-monotonic JNK dose-response. E2 and all XE compounds induced cell proliferation, while mixtures of these compounds with E2 suppressed …
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Synthesis and Characterization of Sulfonated Poly (Arylene Ether Sulfone) Copolymers Via Direct Copolymerization: Candidates for Proton Exchange Membrane Fuel Cells
… (PEM) in fuel cells. Commercially available bisphenols were selected to produce cost effective alternative PEMs. Partially aliphatic bisphenol A and hexafluorinated (6F) bisphenol AF produced amorphous copolymers with different thermal oxidative and surface properties. Biphenol and …
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Artificial Transmembrane Signalling and Cooperativity in H-Bonded Networks
… the next hydrogen bond donor by 33%. A series of bisphenols variously substituted in the *para* position allowed to quantify the substituent effect. Addition of a *para*-nitro substituent to the phenol that acts as the intramolecular hydrogen bond donor strengthened the intermolecular hydrogen …
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Synthesis and Characterization of Amorphous Cycloaliphatic Copolyesters with Novel Structures and Architectures
… copolyesters based on various hydroxyethylated bisphenols were also prepared for comparison. The results revealed that the TD-containing polymers had higher thermal stability and higher Tg's than the corresponding non-TD analogs. For TD-containing copolyesters, the mechanical properties were …
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Synthesis and characteristics of polyarylene ether sulfones
… homopolymers and copolymers derived from various bisphenols. Our investigation into the kinetics and mechanism of this process has demonstrated that this route deviates from simple second order kinetics. This deviation has been rationalized to be due to the heterogeneous nature of the reaction. …
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Characterizing the Binding Potential, Activity, and Bioaccessibility of Peroxisome Proliferator Activated Receptor Gamma (PPARγ) Ligands in Indoor Dust
… phthalates, organotins, halogenated phenols and bisphenols. Additional attention was also given to the potential activity of the major metabolites of several of these compounds. Since the primary sink for many of these SVOCs is dust, and dust ingestion has been confirmed as an important pathway …
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Investigating the endocrine disrupting potential and cytotoxic effects of packaging leachates and plasticisers
Endocrine disrupting chemicals are compounds which can alter the function(s) of the endocrine system by disrupting natural signalling, production and secretion of hormones, contributing to a wide range of adverse health effects. Plastic packaging and films have been identified to leach …