312 research outputs found
Lithium transport in crown ether polymers
No full textA series of 12-, 13-, and 14-membered crown ether rings bearing polymerisable side-chains has been synthesised. The crown ethers were attached to a methacrylate or acrylate polymerisable group either via a short link (Ring-CH(_2)-O-Polymer) or via a spacer group. Both hydrocarbon and ethylene oxide spacer groups were used, giving structures of the form (Ring-CH(_2)-O-(CH(_2))(_6)-O-Polymer) and (Ring-CH(_2)-O-((CH(_2)CH(_2))(_2)O)-Polymer). The ethylene oxide chain can potentially bind to a Li(^+) dopant ion. The relative Li(+) binding affinity of 12-, 13-, and 14-membered mono- and disubstituted crown ethers has been assessed by variable temperature (^13)c and (^7)Li NMR. The crown ether bearing monomers were polymerised using standard free-radical polymerisation methods to yield amorphous materials whose glass transition temperature (T(_g)) was controlled principally by the nature of the spacer group. On doping with lithium triflate (LiCF(_3)SO(_3)), the polymers exhibit high ionic conductivity. The conductivity was primarily dependent on polymer T(_g), but was also found to be higher for 12-crown-4 based systems than for 13-crown-4 and 14-crown-4 based analogues. This behaviour was consistent with the results of the NMR studies, which showed that Li(^+) exchange occurs more readily between 12-crown-4 rings than 13- or 14-crown-4 rings. The NMR studies also showed that 12-crown-4 systems have a higher tendency to form 2:1 (ring : Li(^+)) complexes. Within a polymer matrix, the presence of 2:1 complexes allows Li(^+) migration via an association-disassociation mechanism, avoiding the high energy intermediate state of a free or weakly bound Li(^+) ion. The greater encapsulation provided by 2:1 complexation may also aid in ion pair separation
The mother of Pyong Yang
No full textPamphlet: The Mother of Pyong Yang (Rosetta S. Hall). Author Mary Wilton is also known as Helen Young Snyder
A new description of the pictures, statues, bustos, basso relievos, and other curiosities, in the Earl of Pembroke's house, at Wilton : in the antiques of this collection are contained the whole of Cardinal Richelieu's, Cardinal Mazarine's, and the greatest part of the Earl of Arundel's : besides several particular pieces, purchased at different times.
No full textAuthorship attributed to James Kennedy by Halkett & Laing and Brit. Mus. Cat., v. 29, col. 230.Signatures: [A]² B-K⁸ L⁴(-L4).Final page blank.ESTC (RLIN)Mode of access: Internet.Library's c.2 bound with: The Weymouth guide, exhibiting the ancient and present state of Weymouth and Melcombe Regis : with a description of Milton Abbey, Sherborne Castle, Lulworth Castle, the island of Portland, and other place worthy the attention of strangers who visit Weymouth. Weymouth : Printed for the editor, [1789?]Library's c.1 bound with: A description of the pictures, statues, busto's, basso-relievo's, and other curiosities at the Earl of Pembroke's house at Wilton / by Richard Cowdry. London : Printed for the author, and sold by J. Robinson ... : at Mr. Leake's, at Bath, and at Mr. Gibbs's Glover, at Salisbury, 1751. (88-B19392
The use of recovered metal complexes in catalysis
No full textResearch in the group led by James Wilton‐Ely focuses on catalysis, imaging and sensing. All of this work involves d- and f-elements and is underpinned by the group’s wide-ranging expertise in synthesis. Collaborations with researchers in engineering, medicine and bioimaging allow these discoveries to be used to address major healthcare and sustainability challenges. Professor Wilton-Ely is the author of more than 100 publications and was the recipient of the 2021 Sir Geoffrey Wilkinson Award from the Royal Society of Chemistry for his work on metal-based carbon monoxide sensing. He has a strong interest in sustainability, having directed the MRes Green Chemistry course at Imperial College for over 12 years (2010–2022). He has published on the use of recovered metals in catalysis (1–5), the catalytic transformation of biomass to platform chemicals (6–11) and magnetically-recoverable nanoscale catalysts (12, 13). Elemental sustainability is a pressing concern for all researchers using precious metals and this has led Wilton-Ely to work with colleagues to explore the potential for using gold (3) and palladium (4, 5) complexes recovered from end-of-life products in catalysis
The Talk of Maine piece on expert birders, Wendy Howes of Wilton and Wally Sum
No full textThe Talk of Maine piece on expert birders, Wendy Howes of Wilton and Wally Summer of Canaan, who attempted to break the official American Birding Association Big Day record for Maine, set in 1993 by Lysle Brinker from the Belgrade area, and his team. The author accompanied the two birders as they traveled to numerous sites in Maine on a tight, pre-arranged schedule in late spring. They ultimately identified a total of 140 birds by sight and/or sound, falling short of the record, which was 163
On the color line: the social consequences of White/Black biracial self-categorization
No full textBlack/White biracial individuals are marginal group members at the periphery of both Black (i.e., low status) and White (i.e., high status) groups. However, scant research has investigated the consequences of self-categorization for how multiracial people are perceived. The proposed research investigated the extent to which perceptions of White/Black biracial targets depend on their self-categorization (i.e., as Black or biracial). Drawing from social identity theory, I also examined whether perceivers‟ race and racial identification moderated responses to biracial targets‟ self-categorization, as well as the mechanisms that may account for differential responses to biracial targets (e.g., perceptions of loyalty) that guide perceiver‟s evaluations of these targets. Consistent with expectations, Black perceivers saw the biracial target as higher in social status. However, only Black (and not White) perceivers positively evaluated the Black self-categorizing target as more competent than the biracial self-categorizing target. The hypothesis that perceivers higher in racial identification would show more favorability towards the Black self-categorizing target than the biracial self-categorizing target was not supported for either Black or White participants. Moreover, the predicted significant three-way interaction of racial identification with race and condition on disloyalty was not found. Thus, racial identification did not moderate these effects.M.S.Includes bibliographical referencesby Leigh Solano Wilto
TIME RESOLVED AND FREQUENCY SELECTIVE FLUORESCENCE OF THE CHL a DIMER
No full textassignment^{1}CCl_{4}$, hexane and benzene is reported
Special Facilities for the Physically Handicapped in Parks & Recreation Areas:
No full textThe purpose of this report if to assess Park and Recreation facilities already existing, (using Kokanee Creek Provincial Park as a model) for use by Physically Handicapped people. After assessing the various aspects of Kokanee Creek Provincial Park and dealing with the problems and inadequacies, recommendations for the rest of B.C. and Canada will be made. Hopefully, this would create a concern for Parks and Recreation areas to improve their facilities for the Physically Handicapped.
Authorization for this report is by Len Dunsford, Co-ordinator, Wildland Recreation Technology Program, Selkirk College, Castlegar, B.C.
In this report, I examined the general environment and facilities in Kokanee Creek Provincial Park. The philosophy behind building facilities for the handicapped is also discussed. The changes needed in Kokanee Creek Provincial Park are summarized and possible problems arising from these changes are considered.
The implications of changes to Kokanee Creek Provincial Park are then applied to Canadian Parks and Recreation areas.Student paper submitted for Wildland Recreation
The Mormon Missionary: Who IS That Knocking at My Door?
No full textRobert L. Lively Jr. The Mormon Missionary: Who IS That Knocking at My Door?
Wilton, Maine: By the Author, 2015
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