Dirac cohomology for U(m,n) and gl(m )

Huang, Yanze

doi:10.14711/thesis-b1514856

Cited by 29 publications

(45 citation statements)

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“…The N-and C-terminal six-helix domains have the same topology and are related by an approximate twofold symmetry ( Fig. 1B), as shown also with GlpT [16] and OxlT and proposed for other MFS transporters [19]. The high degree of symmetry between the N-and C-terminal domains suggests that they have the same genetic origin, although there is low sequence homology between the two domains [20].…”

Section: Transmembrane Helix Packing and Domain Structuresupporting

confidence: 69%

“…This is consistent with the notion that LacY has only one binding site that is alternately accessible to each side of the membrane. In this context, it is noteworthy that the P i /glycerol-3-P antiporter (GlpT), another member of the MFS, has a similar structure, and the substrate-binding site is postulated to be in a similar location [16].…”

Section: Overall Structurementioning

confidence: 99%

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The lactose permease of Escherichia coli: overall structure, the sugar‐binding site and the alternating access model for transport

et al. 2003

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Membrane transport proteins transduce free energy stored in electrochemical ion gradients into a concentration gradient and are a major class of membrane proteins, many of which play important roles in human health and disease. Recently, the X-ray structure of the Escherichia coli lactose permease (LacY), an intensively studied member of a large group of related membrane transport proteins, was solved at 3.5 A î . LacY is composed of N-and C-terminal domains, each with six transmembrane helices, symmetrically positioned within the molecule. The structure represents the inward-facing conformation, as evidenced by a large internal hydrophilic cavity open to the cytoplasmic side. The structure with a bound lactose homolog reveals the sugar-binding site in the cavity, and a mechanism for translocation across the membrane is proposed in which the sugar-binding site has alternating accessibility to either side of the membrane. ß

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Section: Transmembrane Helix Packing and Domain Structuresupporting

confidence: 69%

Section: Overall Structurementioning

confidence: 99%

The lactose permease of Escherichia coli: overall structure, the sugar‐binding site and the alternating access model for transport

et al. 2003

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“…Banaszak and Whitmore 9 calculated mean field phase diagrams using a fourth order expansion in the inhomogeneous order parameter in the weak segregation limit, but considered only lamellar ordering of the microdomains. Recently Huang and Muthukumar 10 have used density functional theory to extend the MFT analysis to the strong segregation limit. Near phase transitions and especially near the MFT Lifshitz point, with an upper dimension of d*ϭ8, MFT breaks down and composition fluctuations become increasingly important.…”

Section: ͑11͒mentioning

confidence: 99%

“…There have been numerous theoretical [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and experimental [19][20][21][22][23][24][25][26][27][28][29][30][31] studies of these systems. If added in small amounts, diblock copolymers will act as a surfactant in homopolymer blends, aggregate at the interface 1,19,20 and hereby reduce the surface tension.…”

Section: Introductionmentioning

confidence: 99%

Fluctuation theory of diblock copolymer/homopolymer blends and its effects on the Lifshitz point

Kielhorn

Muthukumar

1997

The Journal of Chemical Physics

101

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We have considered the stability of lamellar, cylindrical, and spherical morphologies of a ternary melt system of A homopolymers, B homopolymers, and AB diblock copolymers in the weak segregation limit. We have extended the mean field analysis by including composition fluctuations in a one-loop self-consistent approximation. We find rich binary and ternary phase diagrams with multiphase equilibria which are highly sensitive to parameter variations. The order-disorder transition points (N) ODT are shifted upward relative to the mean field theory ͑MFT͒ transition points and all second order MFT microphase separation transitions are changed to first order. Composition fluctuations modify the MFT microphase separation and macrophase separations differently. As a consequence, the MFT Lifshitz critical point is destroyed. This implies that observation of the scattering function by itelf does not suffice to infer the existence of Lifshitz critical points. We demonstrate this in a quantitative comparison between our results and experiments.

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“…The impact of III-V NWA quality in terms of minority carrier lifetime, surface recombination velocity (SRV) on the solar cell performance is presented, and a practical guideline to design high-efficiency III-V NWA/Si two-junction solar cell is provided. Figure 1a shows the schematics of the proposed two-junction solar cell, which is comprised of vertically aligned core-shell structure Ga0.35In0.65P (1.7 eV) NWs [9,10] on active thickness (T ) 400 μm Si (1.12 eV) substrates. By balancing the absorption and consumption of source materials, in this study, we fixed the length (L) of GaInP NW at 2 μm.…”

Section: Introductionmentioning

confidence: 99%

Design High-Efficiency III–V Nanowire/Si Two-Junction Solar Cell

Wang¹,

Zhang²,

Zhang³

et al. 2016

Nano Online

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which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited.In this paper, we report the electrical simulation results of a proposed GaInP nanowire (NW)/Si two-junction solar cell. The NW physical dimensions are determined for optimized solar energy absorption and current matching between each subcell. Two key factors (minority carrier lifetime, surface recombination velocity) affecting power conversion efficiency (PCE) of the solar cell are highlighted, and a practical guideline to design high-efficiency two-junction solar cell is thus provided. Considering the practical surface and bulk defects in GaInP semiconductor, a promising PCE of 27.5 % can be obtained. The results depict the usefulness of integrating NWs to construct high-efficiency multi-junction III-V solar cells.

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Dirac cohomology for U(m,n) and gl(m )

Cited by 29 publications

References 0 publications

The lactose permease of Escherichia coli: overall structure, the sugar‐binding site and the alternating access model for transport

The lactose permease of Escherichia coli: overall structure, the sugar‐binding site and the alternating access model for transport

Fluctuation theory of diblock copolymer/homopolymer blends and its effects on the Lifshitz point

Design High-Efficiency III–V Nanowire/Si Two-Junction Solar Cell

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