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  1. Article ; Online: Salts accelerate the switching kinetics of a cyclobis(paraquat-p-phenylene) [2]rotaxane.

    Andersen, Sissel S / Saad, Afaf W / Kristensen, Rikke / Pedersen, Teis S / O'Driscoll, Luke J / Flood, Amar H / Jeppesen, Jan O

    Organic & biomolecular chemistry

    2019  Volume 17, Issue 9, Page(s) 2432–2441

    Abstract: The rate at which the macrocyclic cyclobis(paraquat-p-phenylene) ring of a bistable [2]rotaxane ... as an accelerator to speed up shuttling processes in rotaxanes and catenanes based on the mobile cyclobis(paraquat-p ...

    Abstract The rate at which the macrocyclic cyclobis(paraquat-p-phenylene) ring of a bistable [2]rotaxane moves from a tetrathiafulvalene station to an oxyphenylene station upon oxidation of the tetrathiafulvalene station is found to be increased in the presence of added salts. Compared to the salt-free case, 0.1 M solutions of a series of tetraalkylammonium hexafluorophosphate salts (R4N·PF6, R = H, Me, Et or n-Bu) and of tetrabutylammonium perchlorate (n-Bu4N·ClO4) all afford an increased switching rate, which is largest in the case of n-Bu4N·ClO4 with smaller anions. Variation in the size of the ammonium cation has no significant effect. These results indicate that the addition of excess ions can be used as an accelerator to speed up shuttling processes in rotaxanes and catenanes based on the mobile cyclobis(paraquat-p-phenylene) ring, and that the choice of anion offers a convenient means of controlling the extent of this effect.
    Language English
    Publishing date 2019-02-11
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S.
    ZDB-ID 2097583-1
    ISSN 1477-0539 ; 1477-0520
    ISSN (online) 1477-0539
    ISSN 1477-0520
    DOI 10.1039/c9ob00085b
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Modulation of the Bi3+ 6s2 Lone Pair State in Perovskites for High‐Mobility p‐Type Oxide Semiconductors

    Jueli Shi / Ethan A. Rubinstein / Weiwei Li / Jiaye Zhang / Ye Yang / Tien‐Lin Lee / Changdong Qin / Pengfei Yan / Judith L. MacManus‐Driscoll / David O. Scanlon / Kelvin H.L. Zhang

    Advanced Science, Vol 9, Iss 6, Pp n/a-n/a (2022)

    2022  

    Abstract: ... mobility p‐type oxide semiconductors due to the localized O‐2p derived valence band (VB) structure ... lone pair state to achieve p‐type oxide semiconductors with high hole mobility up to 21 cm2 V−1 s−1 ... orbitals that form the bottom of conduction band. P–N junction diode constructed with p‐type Ba2BiTaO6 and ...

    Abstract Abstract Oxide semiconductors are key materials in many technologies from flat‐panel displays,solar cells to transparent electronics. However, many potential applications are hindered by the lack of high mobility p‐type oxide semiconductors due to the localized O‐2p derived valence band (VB) structure. In this work, the VB structure modulation is reported for perovskite Ba2BiMO6 (M = Bi, Nb, Ta) via the Bi 6s2 lone pair state to achieve p‐type oxide semiconductors with high hole mobility up to 21 cm2 V−1 s−1, and optical bandgaps widely varying from 1.5 to 3.2 eV. Pulsed laser deposition is used to grow high quality epitaxial thin films. Synergistic combination of hard x‐ray photoemission, x‐ray absorption spectroscopies, and density functional theory calculations are used to gain insight into the electronic structure of Ba2BiMO6. The high mobility is attributed to the highly dispersive VB edges contributed from the strong coupling of Bi 6s with O 2p at the top of VB that lead to low hole effective masses (0.4–0.7 me). Large variation in bandgaps results from the change in the energy positions of unoccupied Bi 6s orbital or Nb/Ta d orbitals that form the bottom of conduction band. P–N junction diode constructed with p‐type Ba2BiTaO6 and n‐type Nb doped SrTiO3 exhibits high rectifying ratio of 1.3 × 104 at ±3 V, showing great potential in fabricating high‐quality devices. This work provides deep insight into the electronic structure of Bi3+ based perovskites and guides the development of new p‐type oxide semiconductors.
    Keywords DFT calculations ; electronic structures ; p‐type oxide semiconductors ; photoemission spectroscopy ; Science ; Q
    Subject code 530
    Language English
    Publishing date 2022-02-01T00:00:00Z
    Publisher Wiley
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Revealing Geometry and Fault Interaction on a Complex Structural System Based on 3D P-Cable Data

    James J. Holmes / Hector Perea / Neal W. Driscoll / Graham M. Kent

    Frontiers in Earth Science, Vol

    The San Mateo and San Onofre Trends, Offshore Southern California

    2021  Volume 9

    Abstract: ... the continental margin. State-of-the-art 3D P-Cable seismic data were acquired to characterize the geometry and ...

    Abstract Deformation observed along the San Mateo (SMT) and San Onofre trends (SOT) in southern California has been explained by two opposing structural models, which have very different hazard implications for the coastal region. One model predicts that the deformation is transpressional in a predominantly right lateral fault system with left lateral step-overs. Conversely in the alternative model, the deformation is predicted to be compressional associated with a regional blind thrust that reactivated detachment faults along the continental margin. State-of-the-art 3D P-Cable seismic data were acquired to characterize the geometry and linkage of faults in the SMT and SOT. The new observations provide evidence that deformation along the slope is more consistent with step-over geometry than a regional blind thrust model. For example, regions in the SOT exhibit small scale compressional structures that deflect canyons along jogs in the fault segments across the slope. The deformation observed in the SMT along northwesterly trending faults has a mounded, bulbous character in the swath bathymetry data with steep slopes ( ∼ 25°) separating the toe of the slope and the basin floor. The faulting and folding in the SMT are very localized and occur where the faults trend more northwesterly (average trend ∼ 285°) with the deformation dying away both towards the north and east. In comparison, the SOT faults trend more northerly (average trend ∼ 345°). The boundary between these fault systems is abrupt and characterized by shorter faults that appear to be recording right lateral displacement and possibly accommodating the deformation between the two larger fault systems. Onlapping undeformed turbidite layers reveal that the deformation associated with both major fault systems may be inactive and radiocarbon dating suggests deformation ceased in the middle to late Pleistocene (between 184 and 368 kyr). In summary, our preferred conceptual model for tectonic deformation along the SMT and SOT is best explained by left lateral ...
    Keywords tectonics ; 3D seismic acquisition ; piston coring ; newport-inglewood-rose canyon fault system ; P-cable ; san onofre ; Science ; Q
    Subject code 550
    Language English
    Publishing date 2021-10-01T00:00:00Z
    Publisher Frontiers Media S.A.
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  4. Book ; Online ; E-Book: ABC of major trauma

    Driscoll, P. A. / Skinner, David V. / Goode, Peter N.

    rescue, resuscitation with imaging, and rehabilitation

    (ABC)

    2023  

    Author's details edited by Peter A. Driscoll, David V. Skinner, and Peter N. Goode
    Series title ABC
    Keywords Wounds and injuries/Treatment ; Traumatology ; Emergency medical services
    Subject code 617.1
    Language English
    Size 1 online resource (493 pages)
    Edition Fifth edition.
    Publisher Wiley Blackwell
    Publishing place Hoboken, New Jersey ; Chichester, West Sussex
    Document type Book ; Online ; E-Book
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    ISBN 1-119-49884-8 ; 1-119-49886-4 ; 9781119498858 ; 978-1-119-49884-1 ; 978-1-119-49886-5 ; 1119498856
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  5. Article: Solving the FYVE domain--PtdIns(3)P puzzle.

    Driscoll, P C

    Nature structural biology

    2001  Volume 8, Issue 4, Page(s) 287–290

    MeSH term(s) Amino Acid Motifs ; Amino Acid Sequence ; Carrier Proteins/chemistry ; Carrier Proteins/metabolism ; Crystallography, X-Ray ; Dimerization ; Endocytosis ; Endosomal Sorting Complexes Required for Transport ; Endosomes/metabolism ; Ligands ; Membrane Proteins/chemistry ; Membrane Proteins/metabolism ; Models, Molecular ; Nuclear Magnetic Resonance, Biomolecular ; Phosphatidylinositols/metabolism ; Protein Structure, Tertiary ; Saccharomyces cerevisiae Proteins ; Vesicular Transport Proteins
    Chemical Substances Carrier Proteins ; Endosomal Sorting Complexes Required for Transport ; Ligands ; Membrane Proteins ; Phosphatidylinositols ; Saccharomyces cerevisiae Proteins ; VPS27 protein, S cerevisiae ; Vesicular Transport Proteins ; early endosome antigen 1
    Language English
    Publishing date 2001-04
    Publishing country United States
    Document type News
    ZDB-ID 1192623-5
    ISSN 1072-8368
    ISSN 1072-8368
    DOI 10.1038/86144
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  6. Article: EVALUATION OF PLASMA SUBSTANCE P AND BETA-ENDORPHIN LEVELS IN CHILDREN WITH PRADER-WILLI SYNDROME.

    Butler, M G / Nelson, T A / Driscoll, D J / Manzardo, A M

    The Journal of rare disorders

    2015  Volume 3, Issue 2

    Abstract: ... in early childhood, if not controlled. Substance P (SP) and beta-endorphin (BE) are neuropeptides involved ... P and beta-endorphin between PWS and unrelated unaffected children.: Methodology: Plasma samples ... substance p and beta-endorphin levels were assessed using Multiplex sandwich immunoassays using the Luminex ...

    Abstract Background: Prader-Willi syndrome (PWS) is a rare obesity-related genetic disorder often caused by a deletion of the chromosome 15q11-q13 region inherited from the father or by maternal disomy 15. Growth hormone deficiency with short stature, hypogonadism, cognitive and behavioral problems, analgesia, decreased gastric motility and decreased ability to vomit with hyperphagia are common in PWS leading to severe obesity in early childhood, if not controlled. Substance P (SP) and beta-endorphin (BE) are neuropeptides involved with centrally and peripherally mediated pain perception, emotional regulation, and gastric motility impacting nausea, emesis and feeding patterns.
    Objective: The goal of this study was to investigate potential mechanisms for PWS symptom development for pain, emotion and gastric motility and plasma levels of substance P and beta-endorphin between PWS and unrelated unaffected children.
    Methodology: Plasma samples were collected from 23 Caucasian children with PWS and 18 unrelated, unaffected siblings with an average age of 8.2 ±2.0 years and age range of 5 to 11 years following an overnight fast and neuropeptide substance p and beta-endorphin levels were assessed using Multiplex sandwich immunoassays using the Luminex magnetic-bead based platform. Linear regression analysis was carried out on log-transformed values adjusted for age, sex, and body mass index (BMI).
    Results: The mean plasma SP (57 ± 23 pg/ml) and BE (592 ± 200 pg/ml) levels in PWS were significantly higher than SP (35 ± 20 pg/ml, F=10.5,
    Conclusions: The increased BE and SP plasma levels relative to unrelated, unaffected siblings may contribute to hyperphagia, abnormal pain sensation and adrenal insufficiency seen in PWS. Increases in SP levels may be modulated by central and/or peripheral actions of BE on opioid, GABA or POMC precursors and may reflect loss of feedback inhibitory control. Further studies are needed to confirm and elucidate the biochemical basis for observed disturbances in neuropeptide levels seen in our study and may impact on the development and persistence of symptoms commonly seen in PWS.
    Language English
    Publishing date 2015-12-31
    Publishing country United States
    Document type Journal Article
    ISSN 2325-6222
    ISSN 2325-6222
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article: Locating Specimens of Extinct Tiger (Panthera tigris) Subspecies: Javan Tiger (P. T. sondaica), Balinese Tiger (P. T. balica), and Caspian Tiger (P. T. virgata), Including Previously Unpublished Specimens

    Yamaguchi, Nobuyuki / Driscoll Carlos A / Werdelin Lars / Abramov Alexei V / Csorba Gabor / Cuisin Jacques / Fernholm Bo / Hiermeier Michael / Hills Daphne / Hunter Luke / Itakura Hiroyuki / Johansson Ulf S / Kascheev Vitaliy / Krohmann Katrin / Martin Thomas / Nowak-Kemp Malgosia / Pavlinov Igor Ya / Renoud Francis / Tomsett Louise /
    Mije Steven van der / Zholnerovskaya Elena / Groves Colin / Kitchener Andrew C / Nijman Vincent / Macdonald David W

    Mammal study. 2013 Sept., v. 38, no. 3

    2013  

    Abstract: Recent advances in multivariate statistics, and in ancient DNA techniques, have greatly increased understanding of tiger phylogeography. However, regardless of advances in analytical methodology, researchers will continue to need access to specimens for ... ...

    Abstract Recent advances in multivariate statistics, and in ancient DNA techniques, have greatly increased understanding of tiger phylogeography. However, regardless of advances in analytical methodology, researchers will continue to need access to specimens for morphological measurements and sampling for genetic analysis. The tiger has become increasingly endangered, and out of the nine putative tiger subspecies, three (Javan, Balinese, and Caspian) have become extinct in the last 100 years, leaving the specimens kept in natural history collections as the only materials available for research. Frustratingly little information is widely available concerning the specimens of these extinct tiger subspecies. We conducted an extensive search for specimens of extinct tiger subspecies, and also developed a simple on-site method to assign unprovenanced and probable Indonesian specimens to either Javan/Balinese or Sumatran subspecies. We located a total of 88 Javan, 11 Balinese, and 46 Caspian tigers, including seven new Javan tigers, and three Balinese tigers that were not widely known previously. These specimens are critical for research in order to understand the intraspecific phylogeny and evolutionary history of the tiger.
    Keywords DNA ; Panthera tigris sondaica ; genetic techniques and protocols ; multivariate analysis ; natural history ; phylogeny ; phylogeography ; Central Asia ; conservation ; Indonesia ; museum ; Sunda Islands
    Language English
    Dates of publication 2013-09
    Size p. 187-198.
    Publishing place UniBio Press
    Document type Article
    ZDB-ID 2152177-3
    ISSN 1348-6160 ; 1343-4152
    ISSN (online) 1348-6160
    ISSN 1343-4152
    DOI 10.3106%2F041.038.0307
    Database NAL-Catalogue (AGRICOLA)

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  8. Article ; Online: Expression of multidrug resistance markers ABCB1 (MDR-1/P-gp) and ABCC1 (MRP-1) in renal cell carcinoma.

    Walsh, Naomi / Larkin, Annemarie / Kennedy, Susan / Connolly, Lisa / Ballot, Jo / Ooi, Wei / Gullo, Giuseppe / Crown, John / Clynes, Martin / O'Driscoll, Lorraine

    BMC urology

    2009  Volume 9, Page(s) 6

    Abstract: ... In this retrospective study the expression of two of these transporter efflux pumps, namely MDR-1 P-gp (ABCB1) and MRP-1 ... Results: In the first study investigating MDR-1 P-gp and MRP-1 protein expression patterns ... showing MDR-1 P-gp and MRP-1 positivity.: Conclusion: Although these findings do not prove a causal ...

    Abstract Background: Renal cell carcinoma patients respond poorly to conventional chemotherapy, this unresponsiveness may be attributable to multidrug resistance (MDR). The mechanisms of MDR in renal cancer are not fully understood and the specific contribution of ABC transporter proteins which have been implicated in the chemoresistance of various cancers has not been fully defined in this disease.
    Methods: In this retrospective study the expression of two of these transporter efflux pumps, namely MDR-1 P-gp (ABCB1) and MRP-1 (ABCC1) were studied by immunohistochemistry in archival material from 95 renal cell carcinoma patients.
    Results: In the first study investigating MDR-1 P-gp and MRP-1 protein expression patterns in renal cell carcinoma patients, high levels of expression of both efflux pumps are observed with 100% of tumours studied showing MDR-1 P-gp and MRP-1 positivity.
    Conclusion: Although these findings do not prove a causal role, the high frequency of tumours expressing these efflux pumps suggests that they may be important contributors to the chemoresistance of this tumour type.
    MeSH term(s) ATP Binding Cassette Transporter, Subfamily B ; ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism ; Aged ; Aged, 80 and over ; Antineoplastic Agents/administration & dosage ; Biomarkers, Tumor/metabolism ; Carcinoma, Renal Cell/drug therapy ; Carcinoma, Renal Cell/metabolism ; Female ; Gene Expression Regulation, Neoplastic/drug effects ; Humans ; Kidney Neoplasms/drug therapy ; Kidney Neoplasms/metabolism ; Male ; Middle Aged ; Multidrug Resistance-Associated Proteins/metabolism ; Neoplasm Proteins/metabolism ; Tumor Cells, Cultured
    Chemical Substances ABCB1 protein, human ; ATP Binding Cassette Transporter, Subfamily B ; ATP Binding Cassette Transporter, Subfamily B, Member 1 ; Antineoplastic Agents ; Biomarkers, Tumor ; Multidrug Resistance-Associated Proteins ; Neoplasm Proteins ; multidrug resistance-associated protein 1 (Y49M64GZ4Q)
    Language English
    Publishing date 2009-06-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 2059857-9
    ISSN 1471-2490 ; 1471-2490
    ISSN (online) 1471-2490
    ISSN 1471-2490
    DOI 10.1186/1471-2490-9-6
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  9. Article ; Online: Mechanical evaluation of human cadaveric lumbar soft tissues suggests possible physiological stress shielding within musculoskeletal soft tissues by the thoracolumbar fascia.

    Newell, Emily / Driscoll, Mark

    IEEE transactions on bio-medical engineering

    2024  Volume PP

    Abstract: ... between tissues. P<0.05 was deemed significant.: Results: The TLF and ES exhibited an average ... an average tensile stress of 8.4MPa and 1.7MPa (p<0.001) exhibited by the stiffer and less stiff TLF samples ... of the TLF and ES (p<0.002).: Conclusion: Results suggest elevated loading towards stiffer TLF samples ...

    Abstract Objective: This study investigates the potential for stress shielding within musculoskeletal soft tissues through analysis of stress distributions between lumbar fascial and muscle tissues via mechanical testing.
    Methods: Using a custom apparatus, 51 posterior thoracolumbar fascia (TLF) samples and 18 erector spinae (ES) cadaveric samples underwent tensile testing involving three loading-unloading cycles, followed by loading to 6% strain, to mechanically characterize samples. Parallel tensile testing using 20 pairs of two TLF samples, and seven pairs of TLF and ES samples was then conducted for stress distribution analysis between tissues. P<0.05 was deemed significant.
    Results: The TLF and ES exhibited an average elastic modulus of 150.9MPa and 0.6MPa, respectively. At 6% strain, parallel testing of the TLF pairs yielded an average tensile stress of 8.4MPa and 1.7MPa (p<0.001) exhibited by the stiffer and less stiff TLF samples, respectively. Similarly, TLF-ES parallel testing resulted in average tensile stresses of 7.1MPa and 0.07MPa of the TLF and ES (p<0.002).
    Conclusion: Results suggest elevated loading towards stiffer TLF samples relative to less stiff TLF and ES samples. In soft tissues affected by LBP, skewed stress distributions may result in the TLF withstanding the majority of stress, yielding cyclical stress shielding that may contribute to and/or promote LBP.
    Significance: This novel study demonstrates a potential load allocation bias towards the TLF, laying the foundation for stress shielding within lumbar musculoskeletal soft tissues affected by degenerative musculoskeletal conditions.
    Language English
    Publishing date 2024-04-10
    Publishing country United States
    Document type Journal Article
    ZDB-ID 160429-6
    ISSN 1558-2531 ; 0018-9294
    ISSN (online) 1558-2531
    ISSN 0018-9294
    DOI 10.1109/TBME.2024.3387343
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: MDR1/P-glycoprotein and MRP-1 mRNA and protein expression in non-small cell lung cancer.

    Roy, S / Kenny, E / Kennedy, S / Larkin, A / Ballot, J / Perez De Villarreal, M / Crown, J / O'Driscoll, L

    Anticancer research

    2007  Volume 27, Issue 3A, Page(s) 1325–1330

    Abstract: ... of mrp1 was found to be predominant over mdr1 at the mRNA level, while MDR1 P-gp was more frequently ...

    Abstract Background: Multiple drug resistance (MDR), both inherent and acquired, is a serious problem in non-small cell lung carcinomas (NSCLC). The purpose of this study was to investigate the prevalence of expression of genes encoding drug efflux pumps, MDR1 and MRP-1, at both the mRNA and protein levels, in this type of cancer.
    Materials and methods: Tumour specimens (38 cases) were analysed using immunohistochemistry and, where possible (30 cases), also using reverse-transcriptase polymerase chain reaction.
    Results: The results from this analysis indicated that either, or both, drug efflux pumps were frequently expressed in NSCLC. Expression of mrp1 was found to be predominant over mdr1 at the mRNA level, while MDR1 P-gp was more frequently detected than MRP-1 protein. In some cases, proteins encoding pumps were detected without corresponding mRNAs--possibly due to differing sensitivities of the analysis techniques.
    Conclusion: Future studies of mdr1 and mrp1 using increased-sensitivity qPCR techniques, in parallel with protein analysis, in larger cohorts of cases may help to elucidate the role of drug efflux pumps in NSCLC multiple drug resistance.
    MeSH term(s) ATP-Binding Cassette, Sub-Family B, Member 1/biosynthesis ; ATP-Binding Cassette, Sub-Family B, Member 1/genetics ; Adult ; Aged ; Aged, 80 and over ; Carcinoma, Non-Small-Cell Lung/genetics ; Carcinoma, Non-Small-Cell Lung/metabolism ; Humans ; Immunohistochemistry ; Lung Neoplasms/genetics ; Lung Neoplasms/metabolism ; Middle Aged ; Multidrug Resistance-Associated Proteins/biosynthesis ; Multidrug Resistance-Associated Proteins/genetics ; RNA, Messenger/biosynthesis ; RNA, Messenger/genetics ; Reverse Transcriptase Polymerase Chain Reaction
    Chemical Substances ATP-Binding Cassette, Sub-Family B, Member 1 ; Multidrug Resistance-Associated Proteins ; RNA, Messenger ; multidrug resistance-associated protein 1 (Y49M64GZ4Q)
    Language English
    Publishing date 2007-05
    Publishing country Greece
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 604549-2
    ISSN 1791-7530 ; 0250-7005
    ISSN (online) 1791-7530
    ISSN 0250-7005
    Database MEDical Literature Analysis and Retrieval System OnLINE

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