65 research outputs found

    Data for: Sulfo-functional 3D porous cellulose/graphene oxide composites for highly efficient removal of methylene blue and tetracycline from water

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    Figure S1 SEM images of pure CE aerogels. 2 wt% (a), 3 wt% (b), 4 wt% (c and e), 5 wt% (d and f), BET nitrogen adsorption/desorption isotherm of the CE4 aerogel (g). Figure S2The images of pure CE2 (a), CE3 (b), CE4 (c) and CE5 (d) aerogels with the loading of 0 and 100 g weight. The weight of CE aerogels were 0.0382 g, 0.0565 g, 0.0745 g and 0.0892 g, respectively. Pure CE aerogels with (e) and without (f) added NaCl, CG composite aerogels with (g) and without (h) added NaCl. Figure S3: EDX spectrum and element analysis results of the CG4.5 (a) and SCG4.5 (b); EDX mapping of the CG4.5 (c) and SCG4.5 (d). Figure S4: The illustrative morphology of the SCG aerogel (a); adsorption mechanism of MB and TC by the SCG aerogel (b). Table S1 Bulk densities and liquid adsorptions of pure CE aerogels. Table S2 BET results of some representative samples. Table S3 Deconvolution of C1s peaks of CG4.5 and SCG4.5 aerogels. Table S4 Kinetics parameters for MB adsorption. Table S5 Kinetics parameters for TC adsorption. Table S6 Parameters of the isotherms models for MB and TC adsorption on the SCG aerogels

    Restructuring of Graphene Oxide Sheets into Monodisperse Nanospheres

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    We demonstrate a method to restructure graphene oxide sheets into monodisperse solid 17 nm nanospheres by tuning the solution ionic strength. This method enables the preparation of both two-dimensional self-assemblies comprising three-dimensional GO nanospheres and three-dimensional super assemblies of GO clusters via dispersal into an aerosol. The GO super assemblies are more thermally stable than single crumpled sheets. Finally, we demonstrate that GO nanospheres and their assemblies can be thermally processed to form reduced GO with high aromatic character while still maintaining their spherical conformation

    Image6_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.TIF

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    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p

    Image4_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.TIF

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    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p

    DataSheet1_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.PDF

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    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p

    Image7_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.TIF

    No full text
    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p

    Image3_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.TIF

    No full text
    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p

    Reduction of Suspended Graphene Oxide Single Sheet Nanopaper: The Effect of Crumpling

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    The recent development of aerosol generated crumpled graphene oxide nanopaper provides a test bed for studying the reactivity of physically deformed graphene-based materials. In this work, we measured the thermal reduction of aerosolized single sheet, crumpled graphene oxide (GO) nanopaper. Online aerosol mass analysis was used to monitor the mass evolution of individual crumpled GO nanopaper during reduction. For the first time, the extent of sp<sup>2</sup> bonding within the material was characterized using photoacoustic spectroscopy. The chemical composition of reduced GO nanopaper was evaluated using X-ray photoemission spectroscopy (XPS). Thermal reduction kinetics was determined using both the loss of mass and the change in optical absorption, each measured as a function of temperature. The activation energies were different for the two techniques, suggesting mass loss and light absorption probe different processes of GO reduction. We measured a constant effective density at high reduction temperatures suggesting that portions of reduced GO unzip from the sheet similar to what has been observed in oxidized graphene

    Image5_Evolution of CDK1 Paralog Specializations in a Lineage With Fast Developing Planktonic Embryos.TIF

    No full text
    The active site of the essential CDK1 kinase is generated by core structural elements, among which the PSTAIRE motif in the critical αC-helix, is universally conserved in the single CDK1 ortholog of all metazoans. We report serial CDK1 duplications in the chordate, Oikopleura. Paralog diversifications in the PSTAIRE, activation loop substrate binding platform, ATP entrance site, hinge region, and main Cyclin binding interface, have undergone positive selection to subdivide ancestral CDK1 functions along the S-M phase cell cycle axis. Apparent coevolution of an exclusive CDK1d:Cyclin Ba/b pairing is required for oogenic meiosis and early embryogenesis, a period during which, unusually, CDK1d, rather than Cyclin Ba/b levels, oscillate, to drive very rapid cell cycles. Strikingly, the modified PSTAIRE of odCDK1d shows convergence over great evolutionary distance with plant CDKB, and in both cases, these variants exhibit increased specialization to M-phase.</p
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