32,299 research outputs found
Pterophorus maolanensis Li 2002
No full text<i>Pterophorus maolanensis</i> Li, 2002 <p>(Fig. 16)</p> <p> <i>Pterophorus maolanensis</i> Li, 2002: 373.</p>Published as part of <i>Hao, Shulian, Kendrick, Roger C. & Li, Houhun, 2008, Microlepidoptera of Hong Kong: Checklist of Pterophoridae, with description of one new species (Insecta, Lepidoptera), pp. 37-48 in Zootaxa 1821</i> on page 46, DOI: <a href="http://zenodo.org/record/274374">10.5281/zenodo.274374</a>
A new bound for the smallest x with ?(x) > li(x)
No full textWe reduce the leading term in Lehman's theorem. This improved estimate allows us to refine the main theorem of Bays and Hudson [2]. Entering 2,000,000 Riemann zeros, we prove that there exists x in the interval [exp (727.951858), exp (727.952178)] for which ?(x) - li(x) > 3.2 × 10151. There are at least 10154 successive integers x in this interval for which ?(x) > li(x). This interval is strictly a sub-interval of the interval in Bays and Hudson, and is narrower by a factor of about 12
Zhongyi Li and Fenglian Yi Memoir
No full textBook - A memoir detailing the story of Zhongyi Li and Fenglian Yi in China (48 pages
Pterophorus attenuatus Hao, Kendrick & Li, 2008, sp. nov.
No full text<i>Pterophorus attenuatus</i> sp. nov. <p>See the description of new species.</p>Published as part of <i>Hao, Shulian, Kendrick, Roger C. & Li, Houhun, 2008, Microlepidoptera of Hong Kong: Checklist of Pterophoridae, with description of one new species (Insecta, Lepidoptera), pp. 37-48 in Zootaxa 1821</i> on page 46, DOI: <a href="http://zenodo.org/record/274374">10.5281/zenodo.274374</a>
Enhanced photoinduced electron-transfer reduction of Li +@C 60 in comparison with C 60
No full textKinetics of photoinduced electron transfer from a series of electron donors to the triplet excited state of lithium ion-encapsulated C 60 (Li +@C 60) was investigated in comparison with the corresponding kinetics of the photoinduced electron transfer to the triplet excited state of pristine C 60. Femtosecond laser flash photolysis measurements of Li +@C 60 revealed that singlet excited state of Li +@C 60 (λ max = 960 nm) underwent intersystem crossing to the triplet excited state [ 3(Li +@C 60)*: λ max = 750 nm] with a rate constant of 8.9 × 10 8 s -1 in deaerated benzonitrile (PhCN). The lifetime of 3(Li +@C 60)* was determined by nanosecond laser flash photolysis measurements to be 48 μs, which is comparable to that of C 60. Efficient photoinduced electron transfer from a series of electron donors to 3(Li +@C 60)* occurred to produce the radical cations and Li +@C 60 •-. The rate constants of photoinduced electron transfer of Li +@C 60 •- are significantly larger than those of C 60 when the rate constants are less than the diffusion-limited value in PhCN. The enhanced reactivity of 3(Li +@C 60)* as compared with 3C 60* results from the much higher one-electron reduction potential of Li +@C 60 (0.14 V vs SCE) than that of C 60 (-0.43 V vs SCE). The rate constants of photoinduced electron transfer reactions of Li +@C 60 and C 60 were evaluated in light of the Marcus theory of electron transfer to determine the reorganization energies of electron transfer. The reorganization energy of electron transfer of Li +@C 60 was determined from the driving force dependence of electron transfer rate to be 1.01 eV, which is by 0.28 eV larger than that of C 60 (0.73 eV), probably because of the change in electrostatic interaction of encapsulated Li + upon electron transfer in PhCN. © 2012 American Chemical Society
Crystallisation and substitutions of fluor-magnesio-richterite (Li,Na,K)2Mg6Si8O22F2 glasses
No full textThe effect of Li+ and K+ substitutions for Na + on the crystallisation of the fluor-magnesio-richterite, Na 2Mg6Si8O22F2, glasses was investigated. Transparent colourless glasses were obtained in all cases except when sodium was fully substituted by Li when cristobalite crystals where found in the melt. XRD measurements showed the presence of fluor-magnesio-richterite, proto-amphibole,fluorophlogopite, taeinolite, enstatite, forsterite, lithium disilicate and cristobalite in the samples crystallised in the 600-1000°C temperature range. The coefficient of thermal expansion values of the glass-ceramic samples were in the range 98-116×10-7°C -1 (20-500°C) depending on the composition: fluoramphibole giving relatively higher values while enstatite and fluormica gave relatively lower values. The glass-ceramics had medium densities of 2.794-2.925 g/cm3. SEM images showed homogeneous microstructures of interlocked fibrous and flake-like crystals in a cryptocrystalline groundmass
Analysis of immune-related loci identifies 48 new susceptibility variants for multiple sclerosis
No full textUsing the ImmunoChip custom genotyping array, we analyzed 14,498 subjects with multiple sclerosis and 24,091 healthy controls for 161,311 autosomal variants and identified 135 potentially associated regions (P < 1.0 × 10−4). In a replication phase, we combined these data with previous genome-wide association study (GWAS) data from an independent 14,802 subjects with multiple sclerosis and 26,703 healthy controls. In these 80,094 individuals of European ancestry, we identified 48 new susceptibility variants (P < 5.0 × 10−8), 3 of which we found after conditioning on previously identified variants. Thus, there are now 110 established multiple sclerosis risk variants at 103 discrete loci outside of the major histocompatibility complex. With high-resolution Bayesian fine mapping, we identified five regions where one variant accounted for more than 50% of the posterior probability of association. This study enhances the catalog of multiple sclerosis risk variants and illustrates the value of fine mapping in the resolution of GWAS signals
Strong supramolecular binding of Li +@C 60 with sulfonated meso-tetraphenylporphyrins and long-lived photoinduced charge separation
No full textA supramolecular binding occurred between lithium ion encapsulated [60]fullerene (Li +@C 60) and sulfonated tetraphenylporphyrins ([MTPPS] 4- M = H 2 and Zn) in a benzonitrile solution. Photoexcitation of Li +@C 60/[MTPPS] 4- results in formation of a long-lived charge-separated state by photoinduced electron transfer. © The Royal Society of Chemistry 2012
Bambusananus furcatus Li & Xing 2011
No full textBambusananus furcatus Li & Xing, 2011 Bambusananus furcatus Li & Xing (in Li et al.), 2011: 45. Host plant. Bamboo (Li et al., 2011), Chimonobambusa angustifolia C. D. Chu & C. S. Chao. Distribution. Southwestern China (Guizhou). Materials examined. 1 3 (holotype), 1 Ƥ (paratype), Leigongshan, Leishan, Guizhou, China, 17 Aug. 2005, Z.-Z. Li and B. Zhang; 8 3, 14 ƤƤ, Leigongshan, Leishan, Guizhou, bamboo (Chimonobambusa angustifolia C. D. Chu & C. S. Chao), 6 Nov. 2010, L. Yang and X.-S. Chen (IEGU).Published as part of Yang, Lin & Chen, Xiang-Sheng, 2012, Review of bamboo-feeding leafhopper genus Bambusananus Li & Xing (Hemiptera: Cicadellidae: Deltocephalinae) with description of a new species from China, pp. 48-54 in Zootaxa 3353 on page 50, DOI: 10.5281/zenodo.21099
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
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