LIVIVO - The Search Portal for Life Sciences

zur deutschen Oberfläche wechseln
Advanced search

Search results

Result 1 - 10 of total 44

Search options

  1. Article ; Online: High power zinc iodine redox flow battery with iron-functionalized carbon electrodes.

    Williams, Abena A / Emmett, Robert K / Roberts, Mark E

    Physical chemistry chemical physics : PCCP

    2023  Volume 25, Issue 24, Page(s) 16222–16226

    Abstract: The zinc iodine (ZI) redox flow battery (RFB) has emerged as a promising candidate for grid-scale electrical energy storage owing to its high energy density, low cost and environmental friendliness. In this work, ZI RFBs were made with electrodes ... ...

    Abstract The zinc iodine (ZI) redox flow battery (RFB) has emerged as a promising candidate for grid-scale electrical energy storage owing to its high energy density, low cost and environmental friendliness. In this work, ZI RFBs were made with electrodes comprising carbon nanotubes (CNT) with redox-active iron particles, yielding higher discharge voltages, power densities, and 90% lower charge transfer resistances compared to cells with inert carbon electrodes. Analysis of the polarization curves reveals that cells with iron-containing electrodes have lower mass transfer resistances and 100% increase in power density (44 mW cm
    Language English
    Publishing date 2023-06-21
    Publishing country England
    Document type Journal Article
    ZDB-ID 1476244-4
    ISSN 1463-9084 ; 1463-9076
    ISSN (online) 1463-9084
    ISSN 1463-9076
    DOI 10.1039/d3cp02067c
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  2. Article: The role of noninvasive ventilation in the management of type II respiratory failure in patients with myotonic dystrophy.

    Rautemaa, Vilma / Roberts, Mark E / Bentley, Andrew / Felton, Timothy W

    ERJ open research

    2021  Volume 7, Issue 3

    Abstract: Type 1 myotonic dystrophy (DM1) causes sleep disordered breathing and respiratory failure due to a combination of obstructive sleep apnoea, reduced central drive and respiratory muscle weakness. Noninvasive ventilation (NIV) is commonly used for treating ...

    Abstract Type 1 myotonic dystrophy (DM1) causes sleep disordered breathing and respiratory failure due to a combination of obstructive sleep apnoea, reduced central drive and respiratory muscle weakness. Noninvasive ventilation (NIV) is commonly used for treating respiratory failure in neuromuscular disease; however, there have been few studies assessing the role of NIV in DM1. The aim of this retrospective service evaluation was to investigate the impact of NIV adherence on hypercapnia and symptoms of hypoventilation in patients with DM1. Data on capillary carbon dioxide tension (
    Language English
    Publishing date 2021-07-26
    Publishing country England
    Document type Journal Article
    ZDB-ID 2827830-6
    ISSN 2312-0541
    ISSN 2312-0541
    DOI 10.1183/23120541.00192-2020
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  3. Article: Responsive electrolytes that inhibit electrochemical energy conversion at elevated temperatures

    Kelly, Jesse C / Gupta, Rishi / Roberts, Mark E

    Journal of materials chemistry A. 2015 Feb. 3, v. 3, no. 7

    2015  

    Abstract: Energy storage has emerged as a critical challenge due to the increasing demand to utilize energy from intermittent, renewable resources. Furthermore, growing interest in decreasing our dependence on petroleum necessitates the development of safe and ... ...

    Abstract Energy storage has emerged as a critical challenge due to the increasing demand to utilize energy from intermittent, renewable resources. Furthermore, growing interest in decreasing our dependence on petroleum necessitates the development of safe and efficient energy storage for transportation. Li-ion batteries have emerged as the premier candidate to meet these demands; however, such systems are limited by thermal hazards (runaway reactions, fires, explosions), which become increasingly dangerous in large-format batteries. We have developed an electrolyte system comprising poly(ethylene oxide), an ionic liquid and lithium salt that exhibits an intrinsic mechanism for inhibiting device operation when the temperature increases beyond a given threshold, which is attributed to polymer–ionic liquid phase separation. In the following article, we describe how the thermally activated phase separation causes a decrease in ion conductivity, thereby affecting the concentration of ions at the electrode, in addition to an increase in charge transfer resistance from the formation of a polymer coating on the porous electrode. Such mixtures provide a transformative approach to regulating electrochemical processes, which is necessary to achieve inherently safe operation of large format Li-ion batteries.
    Keywords coatings ; electrochemistry ; electrodes ; energy conversion ; explosions ; fires ; ionic liquids ; ions ; liquids ; lithium ; lithium batteries ; polyethylene glycol ; separation ; temperature
    Language English
    Dates of publication 2015-0203
    Size p. 4026-4034.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/c4ta06482h
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  4. Article: Scalable, template-free synthesis of conducting polymer microtubes

    Díaz-Orellana, Kryssia P / Roberts, Mark E

    RSC advances. 2015 Mar. 10, v. 5, no. 32

    2015  

    Abstract: The integration of new materials in commercial energy storage systems faces many challenges, such as scalable manufacturing, charge–discharge efficiency, long term cycle stability, and high power and high energy density. Compared with conventional high- ... ...

    Abstract The integration of new materials in commercial energy storage systems faces many challenges, such as scalable manufacturing, charge–discharge efficiency, long term cycle stability, and high power and high energy density. Compared with conventional high-surface area carbon nanomaterials, electroactive conducting polymers (ECPs) exhibit an increase in energy density, which is attractive for next generation supercapacitor electrode materials. When designed with micro- and nanoscale dimensions, ECP electrodes display an increase in power density by decreasing the ion diffusion length in bulk electrodes. Here, we describe a template-free method for synthesizing polypyrrole microtubes on various stainless steel meshes with a process inherently scalable to large-area substrates. Microtube growth is governed by the nucleation of hydrogen gas at the mesh joints as a result of proton reduction at the platinum counter electrode. Depending on the size and spacing of the mesh wires and the substrate proximity to the working electrode, polypyrrole microtubes can be created with cylindrical and conical shapes with diameters ranging from 50–400 μm and heights up to 1400 μm. Polymer electrodes exhibiting cylindrical structures electrochemically grown with electrode potentials below 0.8 V exhibit excellent electrochemical performance comparable to thin polymer films. The process scalability is demonstrated using larger area substrates (up to 4 cm2) by carefully controlling the spacing between the working (substrate) and counter electrodes, which also provides an increase in microtube density from 350 cm−2 to 560 cm−2 without any loss in performance.
    Keywords electrochemistry ; electrodes ; energy ; energy density ; films (materials) ; hydrogen ; manufacturing ; nanomaterials ; platinum ; polymers ; porous media ; pyrroles ; stainless steel
    Language English
    Dates of publication 2015-0310
    Size p. 25504-25512.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/c4ra16000b
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  5. Article ; Online: Li-ion battery shut-off at high temperature caused by polymer phase separation in responsive electrolytes.

    Kelly, Jesse C / Degrood, Nicholas L / Roberts, Mark E

    Chemical communications (Cambridge, England)

    2015  Volume 51, Issue 25, Page(s) 5448–5451

    Abstract: For the purpose of realizing inherently safe high-power Li-ion batteries, a model Li4Ti5O12/LiFePO4 rechargeable battery is investigated using the thermally responsive polymer, poly(benzyl methacrylate), in an ionic liquid. At high temperature, battery ... ...

    Abstract For the purpose of realizing inherently safe high-power Li-ion batteries, a model Li4Ti5O12/LiFePO4 rechargeable battery is investigated using the thermally responsive polymer, poly(benzyl methacrylate), in an ionic liquid. At high temperature, battery operation is inhibited as a result of increased internal resistance caused by polymer and ionic liquid phase separation. Li-ion concentration is shown to affect the phase transition temperature and the extent to which batteries are deactivated.
    Language English
    Publishing date 2015-03-28
    Publishing country England
    Document type Journal Article
    ZDB-ID 1472881-3
    ISSN 1364-548X ; 1359-7345 ; 0009-241X
    ISSN (online) 1364-548X
    ISSN 1359-7345 ; 0009-241X
    DOI 10.1039/c4cc10282g
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  6. Article ; Online: Autoimmune fasciitis triggered by the anti-programmed cell death-1 monoclonal antibody nivolumab.

    Parker, Matthew Js / Roberts, Mark E / Lorigan, Paul C / du Plessis, Daniel G / Chinoy, Hector

    BMJ case reports

    2018  Volume 2018

    Abstract: A 43-year-old woman with a history of recently diagnosed metastatic melanoma was commenced on systemic therapy with nivolumab, an anti-programmed cell death-1 monoclonal antibody and one of an increasing group of the so-called 'immune checkpoint ... ...

    Abstract A 43-year-old woman with a history of recently diagnosed metastatic melanoma was commenced on systemic therapy with nivolumab, an anti-programmed cell death-1 monoclonal antibody and one of an increasing group of the so-called 'immune checkpoint inhibitors'. She experienced a dramatic complete response within 6 months of initiation. However, in addition to developing incident autoimmune hypothyroidism, she also developed progressive fatigue, proximal weakness, myalgia and dysphagia. Initial investigations with blood tests, electrophysiology and a muscle biopsy were non-specific or normal. Subsequent examination revealed 'woody' thickening of the subcutaneous tissues of the forearms, thighs and calves consistent with fasciitis. MRI and a full-thickness skin-muscle biopsy were ultimately diagnostic of a likely iatrogenic autoimmune myofasciitis. The clinical manifestations only responded partly to prednisolone 30 mg orally and treatment was escalated to include intravenous immunoglobulin. At 3 months, this has only resulted in a modest incremental improvement.
    MeSH term(s) Antibodies, Monoclonal/administration & dosage ; Antibodies, Monoclonal/adverse effects ; Antineoplastic Agents/administration & dosage ; Antineoplastic Agents/adverse effects ; Autoimmune Diseases/chemically induced ; Autoimmune Diseases/diagnostic imaging ; Autoimmune Diseases/drug therapy ; B7-H1 Antigen/adverse effects ; Biopsy ; Fasciitis/chemically induced ; Fasciitis/diagnostic imaging ; Fasciitis/drug therapy ; Female ; Humans ; Immunoglobulins, Intravenous/therapeutic use ; Immunotherapy/adverse effects ; Magnetic Resonance Imaging ; Melanoma/drug therapy ; Melanoma/pathology ; Middle Aged ; Nivolumab
    Chemical Substances Antibodies, Monoclonal ; Antineoplastic Agents ; B7-H1 Antigen ; Immunoglobulins, Intravenous ; Nivolumab (31YO63LBSN)
    Language English
    Publishing date 2018-02-08
    Publishing country England
    Document type Case Reports ; Journal Article
    ISSN 1757-790X
    ISSN (online) 1757-790X
    DOI 10.1136/bcr-2017-223249
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

  7. Article: Identifying thermal phase transitions of lignin–solvent mixtures using electrochemical impedance spectroscopy

    Klett, Adam S / Gamble, Jordan A / Thies, Mark C / Roberts, Mark E

    Green chemistry. 2016 Mar. 29, v. 18, no. 7

    2016  

    Abstract: Lignin is unique among renewable biopolymers in having significant aromatic character, making it potentially attractive for a wide range of uses from coatings to carbon fibers. Recent research has shown that hot acetic acid (AcOH)–water mixtures can be ... ...

    Abstract Lignin is unique among renewable biopolymers in having significant aromatic character, making it potentially attractive for a wide range of uses from coatings to carbon fibers. Recent research has shown that hot acetic acid (AcOH)–water mixtures can be used to recover “ultraclean” lignins of controlled molecular weight from Kraft lignins. A key feature of this discovery is the existence of a region of liquid–liquid equilibrium (LLE), with one phase being rich in the purified lignin and the other rich in solvent. Although visual methods can be used to determine the temperature at which solid lignin melts in the presence of AcOH–water mixtures to form LLE, the phase transition can be seen only at lower AcOH concentrations due to solvent opacity. Thus, an electrochemical impedance spectroscopy (EIS) technique was developed for measuring the phase-transition temperature of a softwood Kraft lignin in AcOH–water mixtures. In electrochemical cells, the resistance to double-layer charging (i.e., polarization resistance Rp) is related to the concentration and mobility of free ions in the electrolyte, both of which are affected by the phases present. When the lignin–AcOH–water mixture was heated through the phase transition, RP was found to be a strong function of temperature, with the maximum in RP corresponding to the transition temperature obtained from visual observation. As the system is heated, acetate ions associate with the solid lignin, forming a liquefied, lignin-rich phase. This association increases the overall impedance of the system, as mobile acetate ions are stripped from the solvent phase and thus are no longer available to adsorb on the polarizing electrode surfaces. The maximum in RP occurs once the new lignin-rich phase has completely formed, and no further association of the lignin polymer with AcOH is possible. Except at sub-ambient temperatures, the phase-transition temperature was a strong function of solvent composition, increasing linearly from 18 °C at 70/30 AcOH/water to 97 °C at 10/90 wt% AcOH/water.
    Keywords acetates ; acetic acid ; biopolymers ; carbon fibers ; coatings ; dielectric spectroscopy ; electrochemistry ; electrodes ; green chemistry ; ions ; melting ; molecular weight ; opacity ; softwood ; solvents ; temperature
    Language English
    Dates of publication 2016-0329
    Size p. 1892-1897.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2006274-6
    ISSN 1463-9270 ; 1463-9262
    ISSN (online) 1463-9270
    ISSN 1463-9262
    DOI 10.1039/c5gc02342d
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  8. Article ; Online: British Thoracic Society Guideline for pleural disease.

    Roberts, Mark E / Rahman, Najib M / Maskell, Nick A / Bibby, Anna C / Blyth, Kevin G / Corcoran, John P / Edey, Anthony / Evison, Matthew / de Fonseka, Duneesha / Hallifax, Rob / Harden, Susan / Lawrie, Iain / Lim, Eric / McCracken, David J / Mercer, Rachel / Mishra, Eleanor K / Nicholson, Andrew G / Noorzad, Farinaz / Opstad, Kirstie /
    Parsonage, Maria / Stanton, Andrew E / Walker, Steven

    Thorax

    2023  Volume 78, Issue Suppl 3, Page(s) s1–s42

    MeSH term(s) Humans ; Pleural Diseases/diagnosis ; Pleural Diseases/therapy
    Language English
    Publishing date 2023-07-11
    Publishing country England
    Document type Journal Article ; Practice Guideline
    ZDB-ID 204353-1
    ISSN 1468-3296 ; 0040-6376
    ISSN (online) 1468-3296
    ISSN 0040-6376
    DOI 10.1136/thorax-2022-219784
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Ui III Zs.83: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  9. Article ; Online: British Thoracic Society Guideline for pleural disease.

    Roberts, Mark E / Rahman, Najib M / Maskell, Nick A / Bibby, Anna C / Blyth, Kevin G / Corcoran, John P / Edey, Anthony / Evison, Matthew / de Fonseka, Duneesha / Hallifax, Rob / Harden, Susan / Lawrie, Iain / Lim, Eric / McCracken, David / Mercer, Rachel / Mishra, Eleanor K / Nicholson, Andrew G / Noorzad, Farinaz / Opstad, Kirstie S /
    Parsonage, Maria / Stanton, Andrew E / Walker, Steven

    Thorax

    2023  Volume 78, Issue 11, Page(s) 1143–1156

    MeSH term(s) Humans ; Pleural Diseases/diagnosis ; Pleural Diseases/therapy ; Pleural Effusion/therapy
    Language English
    Publishing date 2023-08-08
    Publishing country England
    Document type Journal Article
    ZDB-ID 204353-1
    ISSN 1468-3296 ; 0040-6376
    ISSN (online) 1468-3296
    ISSN 0040-6376
    DOI 10.1136/thorax-2023-220304
    Database MEDical Literature Analysis and Retrieval System OnLINE

    More links

    Kategorien

    In stock of ZB MED Cologne/Königswinter

    Ui III Zs.83: Show issues Location:
    Je nach Verfügbarkeit (siehe Angabe bei Bestand)
    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

  10. Article: High charge-capacity polymer electrodes comprising alkali lignin from the Kraft process

    Leguizamon, Samuel / Díaz-Orellana, Kryssia P / Roberts, Mark E / Thies, Mark C / Velez, Julian

    Journal of materials chemistry A. 2015 May 19, v. 3, no. 21

    2015  

    Abstract: Advances in materials chemistry are necessary for low-cost energy storage to support energy generation from renewable sources and electric transportation. Renewable biopolymers, such as sodium lignosulfate (SLS), have attracted interest for electrodes ... ...

    Abstract Advances in materials chemistry are necessary for low-cost energy storage to support energy generation from renewable sources and electric transportation. Renewable biopolymers, such as sodium lignosulfate (SLS), have attracted interest for electrodes when mixed with conducting polymers due to their higher charge-capacity and natural abundance. The availability of SLS is limited and will continue to decrease, while alkali lignin (AL), which accounts for 98% of lignin from paper-pulping, exhibits poor solubility in acidic electrolytes used for electropolymerization of conducting polymers. Here, we utilize organic acid solvents to overcome processing limitations in order to synthesize electrodes comprising polypyrrole (PPy) and SLS. Compared to PPy/SLS, electrodes containing PPy/AL exhibit an increase in capacitance from 312 F g−1 to 444 F g−1, and a decrease in relaxation time constant from 1.7 to 1 s. Furthermore, we showed that the electrochemical performance of PPy/AL electrodes could be further increased by incorporating AL with higher phenolic content that is obtained from an elevated-temperature, pH-driven fractionation process.
    Keywords biopolymers ; capacitance ; electrochemistry ; electrodes ; electrolytes ; energy ; fractionation ; lignin ; pyrroles ; solubility ; solvents
    Language English
    Dates of publication 2015-0519
    Size p. 11330-11339.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ZDB-ID 2702232-8
    ISSN 2050-7496 ; 2050-7488
    ISSN (online) 2050-7496
    ISSN 2050-7488
    DOI 10.1039/c5ta00481k
    Database NAL-Catalogue (AGRICOLA)

    More links

    Kategorien

    Order via subito

    This service is chargeable due to the Delivery terms set by subito. Orders including an article and supplementary material will be classified as separate orders. In these cases, fees will be demanded for each order.

To top