Characterization and solution properties of adamantane-containing quaternary-ammonium-salt-type amphiphilic ionic liquids

Publication date: Available online 20 August 2019Source: Journal of Molecular LiquidsAuthor(s): Risa Kawai, Shiho Yada, Tomokazu YoshimuraAbstractQuaternary-ammonium-salt-type amphiphilic compounds ([CnAdA][X], where n represents the alkyl chain length (n = 1, 2, 4, 6, 8, or 10), X represents a counterion such as [BF4]−, [PF6]−, trifluoromethanesulfonate ([OTf]−), bis(fluorosulfonyl)amide ([FSA]−), or bis(trifluoromethanesulfonyl)amide ([NTf2]−), and Ad and A of AdA represent the adamantane structure and quaternary ammonium group, respectively) were synthesized. The melting points of the prepared compounds were determined by differential scanning calorimetry, and the derivatives with melting points lower than 100 °C were classified as ionic liquids for subsequent analyses. The amphiphilic ionic liquids, [CnAdA][NTf2] (n = 6 and 8), exhibited the lowest melting points (30.6 and 38.7 °C, respectively). Further, the [CnAdA][NTf2] series of amphiphilic ionic liquids exhibited significantly lower conductivities and higher viscosities than the corresponding ionic liquids without the adamantane moiety, [Cn][NTf2]. The viscosities of [CnAdA][NTf2] (n = 6 and 8) decreased significantly with increasing temperature, and showed a larger temperature dependence than that of the viscosities of the [Cn][X] series. The amphiphilic ionic liquids, [C8AdA][X] readily adsorbed at the air/water interface and oriented themselves but did not show...
Source: Journal of Molecular Liquids - Category: Molecular Biology Source Type: research

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Source: Materials Today: Proceedings - Category: Materials Science Source Type: research
Publication date: Available online 21 September 2019Source: The Annals of Thoracic SurgeryAuthor(s): Chien-Hung Chiu, Peng Zhang, Andrew C. Chang, Brian A. Derstine, Brian E. Ross, Binu Enchakalody, Nidhi V. Shah, Stewart C. Wang, Yin-Kai Chao, Jules LinAbstractBackgroundIn patients undergoing neoadjuvant chemoradiotherapy (nCRT) followed by surgery for locally advanced esophageal squamous cell carcinoma (ESCC), patients with a pathological complete response (pCR) have the greatest benefit. The purpose of this study was to identify morphomic factors obtained from pre-treatment computed tomography scans associated with a pa...
Source: The Annals of Thoracic Surgery - Category: Cardiovascular & Thoracic Surgery Source Type: research
In conclusion, evaluation of the present method showed that the newly developed multiplex qPCR is highly specific, precise, and robust method that has potential for application in food-testing laboratories.Graphical abstract
Source: Food Research International - Category: Food Science Source Type: research
Discussion Pulmonary embolism (PE) is potentially life-threatening but fortunately rare event especially in the pediatric population. It was first described in children in 1861. PE is likely underreported because of minimal or non-specific clinical symptoms. The incidence is estimated at 0.05-4.2% with the 4.2% based on autopsy reports. It is probably also increasing as more central venous catheters (CVC) are used, and more children are surviving previously poor prognostic diseases. There is a bimodal distribution with cases
Source: - Category: Pediatrics Authors: Tags: Uncategorized Source Type: news
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Source: Medical Mycology Case Reports - Category: Biology Source Type: research
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Source: Journal of Alloys and Compounds - Category: Chemistry Source Type: research
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Source: European Polymer Journal - Category: Chemistry Source Type: research
Authors: Fishman JE, Kim GJ, Kyeong NY, Goldin JG, Glassberg MK Abstract OBJECTIVE: Our purpose was to compare quantitative CT-derived changes in lung fibrosis with pulmonary function, including DLCO, in human subjects with idiopathic pulmonary fibrosis who received an injection of one of two different intravenous doses of human bone-marrow-derived mesenchymal stem cells. PATIENTS AND METHODS: Two three-subject cohorts from the AETHER trial (Allogeneic Human Cells in subjects with Idiopathic Pulmonary Fibrosis via Intravenous Delivery) underwent high-resolution CT and clinical testing at baseline, 24 weeks, and...
Source: European Review for Medical and Pharmacological Sciences - Category: Drugs & Pharmacology Tags: Eur Rev Med Pharmacol Sci Source Type: research
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Source: Yonsei Medical Journal - Category: Universities & Medical Training Authors: Tags: Yonsei Med J Source Type: research
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Source: Materials Science and Engineering: A - Category: Materials Science Source Type: research
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