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Lumsden MD, Christianson AD, Parshall D, Stone MB, Nagler SE, MacDougall GJ, Mook HA, Lokshin K, Egami T, Abernathy DL, Goremychkin EA, Osborn R, McGuire MA, Sefat AS, Jin R, Sales BC, Mandrus D. Two-dimensional resonant magnetic excitation in BaFe1.84Co0.16As2. PHYSICAL REVIEW LETTERS 2009; 102:107005. [PMID: 19392149 DOI: 10.1103/physrevlett.102.107005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2008] [Indexed: 05/27/2023]
Abstract
Inelastic neutron scattering measurements on single crystals of superconducting BaFe1.84Co0.16As2 reveal a magnetic excitation located at wave vectors (1/2 1/2 L) in tetragonal notation. On cooling below T_{C}, a clear resonance peak is observed at this wave vector with an energy of 8.6(0.5) meV, corresponding to 4.5(0.3) k_{B}T_{C}. This is in good agreement with the canonical value of 5 k_{B}T_{C} observed in the cuprates. The spectrum shows strong dispersion in the tetragonal plane but very weak dispersion along the c axis, indicating that the magnetic fluctuations are two dimensional in nature. This is in sharp contrast to the anisotropic three dimensional spin excitations seen in the undoped parent compounds.
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78
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Bondino F, Magnano E, Malvestuto M, Parmigiani F, McGuire MA, Sefat AS, Sales BC, Jin R, Mandrus D, Plummer EW, Singh DJ, Mannella N. Evidence for strong itinerant spin fluctuations in the normal state of CeFeAsO0.89F0.11 iron-oxypnictide superconductors. PHYSICAL REVIEW LETTERS 2008; 101:267001. [PMID: 19113783 DOI: 10.1103/physrevlett.101.267001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/27/2008] [Indexed: 05/27/2023]
Abstract
The electronic structure in the normal state of CeFeAsO0.89F0.11 oxypnictide superconductors has been investigated with x-ray absorption and photoemission spectroscopy. All of the data exhibit signatures of Fe d-electron itinerancy. Exchange multiplets appearing in the Fe 3s core level indicate the presence of itinerant spin fluctuations. These findings suggest that the underlying physics and the origin of superconductivity in these materials are likely to be quite different from those of the cuprate high-temperature superconductors. These materials provide opportunities for elucidating the role of magnetic fluctuations in high-temperature superconductivity.
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Jin R, Moreira Teixeira L, Dijkstra P, Karperien M, Zhong Z, Feijen J. Fast in-situ formation of dextran-tyramine hydrogels for in vitro chondrocyte culturing. J Control Release 2008. [DOI: 10.1016/j.jconrel.2008.09.014] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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80
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Angst M, Hermann RP, Christianson AD, Lumsden MD, Lee C, Whangbo MH, Kim JW, Ryan PJ, Nagler SE, Tian W, Jin R, Sales BC, Mandrus D. Charge order in LuFe2O4: antiferroelectric ground state and coupling to magnetism. PHYSICAL REVIEW LETTERS 2008; 101:227601. [PMID: 19113522 DOI: 10.1103/physrevlett.101.227601] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Indexed: 05/27/2023]
Abstract
X-ray scattering by multiferroic LuFe2O4 is reported. Below 320 K, superstructure reflections indicate an incommensurate charge order with propagation close to (1/3 1/3 3/2). The corresponding charge configuration, also found by electronic structure calculations as most stable, contains polar Fe/O double layers with antiferroelectric stacking. Diffuse scattering at 360 K, with (1/3 1/3 0) propagation, indicates ferroelectric short-range correlations between neighboring double layers. The temperature dependence of the incommensuration indicates that charge order and magnetism are coupled.
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81
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Christianson AD, Lumsden MD, Delaire O, Stone MB, Abernathy DL, McGuire MA, Sefat AS, Jin R, Sales BC, Mandrus D, Mun ED, Canfield PC, Lin JYY, Lucas M, Kresch M, Keith JB, Fultz B, Goremychkin EA, McQueeney RJ. Phonon density of states of LaFeAsO(1-x)Fx. PHYSICAL REVIEW LETTERS 2008; 101:157004. [PMID: 18999629 DOI: 10.1103/physrevb.78.094517] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Indexed: 05/25/2023]
Abstract
We have studied the phonon density of states (PDOS) in LaFeAsO(1-x)Fx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x approximately 0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.
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Christianson AD, Lumsden MD, Delaire O, Stone MB, Abernathy DL, McGuire MA, Sefat AS, Jin R, Sales BC, Mandrus D, Mun ED, Canfield PC, Lin JYY, Lucas M, Kresch M, Keith JB, Fultz B, Goremychkin EA, McQueeney RJ. Phonon density of states of LaFeAsO(1-x)Fx. PHYSICAL REVIEW LETTERS 2008; 101:157004. [PMID: 18999629 DOI: 10.1103/physrevlett.101.157004] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2008] [Indexed: 05/27/2023]
Abstract
We have studied the phonon density of states (PDOS) in LaFeAsO(1-x)Fx with inelastic neutron scattering methods. The PDOS of the parent compound (x=0) is very similar to the PDOS of samples optimally doped with fluorine to achieve the maximum Tc (x approximately 0.1). Good agreement is found between the experimental PDOS and first-principles calculations with the exception of a small difference in Fe mode frequencies. The PDOS reported here is not consistent with conventional electron-phonon mediated superconductivity.
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83
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Madawala P, Jin R, Rock J, Movsas B, Kim J, Rosenblum M, Ryu S. Radiosurgery Alone or Postoperative Radiosurgery for 1-3 Brain Metastases. Int J Radiat Oncol Biol Phys 2008. [DOI: 10.1016/j.ijrobp.2008.06.1521] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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84
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Brunger AT, Jin R, Breidenbach MA. Highly specific interactions between botulinum neurotoxins and synaptic vesicle proteins. Cell Mol Life Sci 2008; 65:2296-306. [PMID: 18425411 PMCID: PMC11131871 DOI: 10.1007/s00018-008-8088-0] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Despite its extreme toxicity, botulinum neurotoxin is widely utilized in low doses as a treatment for several neurological disorders; higher doses cause the neuroparalytic syndrome botulism. The toxin blocks neurotransmitter release by preferentially attaching to pre-synaptic membrane receptors at neuromuscular junctions and subsequently delivering a Zn2+-dependent protease component to presynaptic neuronal cytosol. These highly specialized enzymes exclusively hydrolyze peptide bonds within SNARE (soluble N-ethylmaleiamide sensitive factor attachment protein receptor) proteins. In this review we discuss the structural basis for botulinum toxin's exquisite specificity for its neuronal cell-surface receptors and intracellular SNARE targets.
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de Graaf R, Kessler RC, Fayyad J, ten Have M, Alonso J, Angermeyer M, Borges G, Demyttenaere K, Gasquet I, de Girolamo G, Haro JM, Jin R, Karam EG, Ormel J, Posada-Villa J. The prevalence and effects of adult attention-deficit/hyperactivity disorder (ADHD) on the performance of workers: results from the WHO World Mental Health Survey Initiative. Occup Environ Med 2008; 65:835-42. [PMID: 18505771 DOI: 10.1136/oem.2007.038448] [Citation(s) in RCA: 221] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
OBJECTIVES To estimate the prevalence and workplace consequences of adult attention-deficit/hyperactivity disorder (ADHD). METHODS An ADHD screen was administered to 18-44-year-old respondents in 10 national surveys in the WHO World Mental Health (WMH) Survey Initiative (n = 7075 in paid or self-employment; response rate 45.9-87.7% across countries). Blinded clinical reappraisal interviews were administered in the USA to calibrate the screen. Days out of role were measured using the WHO Disability Assessment Schedule (WHO-DAS). Questions were also asked about ADHD treatment. RESULTS An average of 3.5% of workers in the 10 countries were estimated to meet DSM-IV criteria for adult ADHD (inter-quartile range: 1.3-4.9%). ADHD was more common among males than females and less common among professionals than other workers. ADHD was associated with a statistically significant 22.1 annual days of excess lost role performance compared to otherwise similar respondents without ADHD. No difference in the magnitude of this effect was found by occupation, education, age, gender or partner status. This effect was most pronounced in Colombia, Italy, Lebanon and the USA. Although only a small minority of workers with ADHD ever received treatment for this condition, higher proportions were treated for comorbid mental/substance disorders. CONCLUSIONS ADHD is a relatively common condition among working people in the countries studied and is associated with high work impairment in these countries. This impairment, in conjunction with the low treatment rate and the availability of cost-effective therapies, suggests that ADHD would be a good candidate for targeted workplace screening and treatment programs.
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86
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Christianson AD, Lumsden MD, Angst M, Yamani Z, Tian W, Jin R, Payzant EA, Nagler SE, Sales BC, Mandrus D. Three-dimensional magnetic correlations in multiferroic LuFe2O4. PHYSICAL REVIEW LETTERS 2008; 100:107601. [PMID: 18352230 DOI: 10.1103/physrevlett.100.107601] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2007] [Indexed: 05/26/2023]
Abstract
We present single crystal neutron diffraction measurements on multiferroic LuFe(2)O(4). Magnetic reflections are observed below transitions at 240 and 175 K indicating that the magnetic interactions in LuFe(2)O(4) are three-dimensional in character. The magnetic structure is refined as a ferrimagnetic spin configuration below the 240 K transition. Below 175 K a significant broadening of the magnetic peaks is observed along with the buildup of a diffuse component to the magnetic scattering.
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87
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Moore RG, Nascimento VB, Zhang J, Rundgren J, Jin R, Mandrus D, Plummer EW. Manifestations of broken symmetry: the surface phases of Ca(2-x)SrxRuO4. PHYSICAL REVIEW LETTERS 2008; 100:066102. [PMID: 18352491 DOI: 10.1103/physrevlett.100.066102] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2007] [Indexed: 05/26/2023]
Abstract
The surface structural phases of Ca(2-x)SrxRuO4 are investigated using quantitative low energy electron diffraction. The broken symmetry at the surface enhances the structural instability against the RuO6 rotational distortion while diminishing the instability against the RuO6 tilt distortion occurring within the bulk crystal. As a result, suppressed structural and electronic surface phase transition temperatures are observed, including the appearance of an inherent Mott metal-to-insulator transition for x=0.1 and possible modifications of the surface quantum critical point near x(c) approximately 0.5.
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88
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Garlea VO, Jin R, Mandrus D, Roessli B, Huang Q, Miller M, Schultz AJ, Nagler SE. Magnetic and orbital ordering in the spinel MnV2O4. PHYSICAL REVIEW LETTERS 2008; 100:066404. [PMID: 18352495 DOI: 10.1103/physrevlett.100.066404] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Indexed: 05/26/2023]
Abstract
Neutron inelastic scattering and diffraction techniques have been used to study the MnV2O4 spinel system. Our measurements show the existence of two transitions to long-range ordered ferrimagnetic states, the first collinear and the second noncollinear. The lower temperature transition, characterized by development of antiferromagnetic components in the basal plane, is accompanied by a tetragonal distortion and the appearance of a gap in the magnetic excitation spectrum. The low-temperature noncollinear magnetic structure has been definitively resolved. Taken together, the crystal and magnetic structures indicate a staggered ordering of the V d orbitals. The anisotropy gap is a consequence of unquenched V orbital angular momentum.
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89
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Ooi ZE, Jin R, Huang J, Loo YF, Sellinger A, deMello JC. On the pseudo-symmetric current–voltage response of bulk heterojunction solar cells. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b718563d] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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90
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Moore RG, Zhang J, Nascimento VB, Jin R, Guo J, Wang GT, Fang Z, Mandrus D, Plummer EW. A surface-tailored, purely electronic, mott metal-to-insulator transition. Science 2007; 318:615-9. [PMID: 17962556 DOI: 10.1126/science.1145374] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Mott transitions, which are metal-insulator transitions (MITs) driven by electron-electron interactions, are usually accompanied in bulk by structural phase transitions. In the layered perovskite Ca(1.9)Sr(0.1)RuO4, such a first-order Mott MIT occurs in the bulk at a temperature of 154 kelvin on cooling. In contrast, at the surface, an unusual inherent Mott MIT is observed at 130 kelvin, also on cooling but without a simultaneous lattice distortion. The broken translational symmetry at the surface causes a compressional stress that results in a 150% increase in the buckling of the Ca/Sr-O surface plane as compared to the bulk. The Ca/Sr ions are pulled toward the bulk, which stabilizes a phase more amenable to a Mott insulator ground state than does the bulk structure and also energetically prohibits the structural transition that accompanies the bulk MIT.
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91
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Bonino F, Marcellin P, Lau GKK, Hadziyannis S, Jin R, Piratvisuth T, Germanidis G, Yurdaydin C, Diago M, Gurel S, Lai MY, Brunetto MR, Farci P, Popescu M, McCloud P. Predicting response to peginterferon alpha-2a, lamivudine and the two combined for HBeAg-negative chronic hepatitis B. Gut 2007; 56:699-705. [PMID: 17127704 PMCID: PMC1942152 DOI: 10.1136/gut.2005.089722] [Citation(s) in RCA: 222] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
OBJECTIVE In a trial of patients with hepatitis B e antigen (HBeAg)-negative chronic hepatitis B, 24 week post-treatment biochemical and virological response rates with peginterferon alpha-2a with or without lamivudine were significantly higher than with lamivudine alone. The effect of pre-treatment factors on post-treatment responses was investigated. METHODS Multivariate analyses were performed using available data from 518 patients treated with peginterferon alpha-2a with or without lamivudine, or with lamivudine alone. A post-treatment response was defined as alanine aminotransferase (ALT) normalisation and hepatitis B virus (HBV) DNA level of <20,000 copies/ml. RESULTS In logistic regression analyses across all treatment arms, peginterferon alpha-2a (with or without lamivudine) therapy, younger age, female gender, high baseline ALT, low baseline HBV DNA and HBV genotype were identified as significant predictors of combined response at 24 weeks post-treatment. In the peginterferon alpha-2a and lamivudine monotherapy arms, patients with genotypes B or C had a higher chance of response than genotype D infected patients (p<0.001), the latter responding better to the combination than to peginterferon alpha-2a monotherapy (p = 0.015). At 1 year post-treatment, response rates by intention-to-treat analysis were 19.2% for the peginterferon alpha-2a, 19.0% for the combination, and 10.0% for the lamivudine groups, with genotypes B or C associated with a sustained combined response to peginterferon alpha-2a with or without lamivudine therapy. CONCLUSIONS Baseline ALT and HBV DNA levels, patient age, gender, and infecting HBV genotype significantly influenced combined response at 24 weeks post-treatment, in patients treated with peginterferon alpha-2a and/or lamivudine. At 1 year post-treatment HBV genotype was significantly predictive of efficacy for patients treated with peginterferon alpha-2a with or without lamivudine.
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92
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Fayyad J, De Graaf R, Kessler R, Alonso J, Angermeyer M, Demyttenaere K, De Girolamo G, Haro JM, Karam EG, Lara C, Lépine JP, Ormel J, Posada-Villa J, Zaslavsky AM, Jin R. Cross-national prevalence and correlates of adult attention-deficit hyperactivity disorder. Br J Psychiatry 2007; 190:402-9. [PMID: 17470954 DOI: 10.1192/bjp.bp.106.034389] [Citation(s) in RCA: 821] [Impact Index Per Article: 48.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Little is known about the epidemiology of adult attention-deficit hyperactivity disorder (ADHD). AIMS To estimate the prevalence and correlates of DSM-IV adult ADHD in the World Health Organization World Mental Health Survey Initiative. METHOD An ADHD screen was administered to respondents aged 18-44 years in ten countries in the Americas, Europe and the Middle East (n=11422). Masked clinical reappraisal interviews were administered to 154 US respondents to calibrate the screen. Multiple imputation was used to estimate prevalence and correlates based on the assumption of cross-national calibration comparability. RESULTS Estimates of ADHD prevalence averaged 3.4% (range 1.2-7.3%), with lower prevalence in lower-income countries (1.9%) compared with higher-income countries (4.2%). Adult ADHD often co-occurs with other DSM-IV disorders and is associated with considerable role disability. Few cases are treated for ADHD, but in many cases treatment is given for comorbid disorders. CONCLUSIONS Adult ADHD should be considered more seriously in future epidemiological and clinical studies than is currently the case.
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93
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Jin R, Rock J, Ajlouni M, Anderson J, Jin J, Massanisso L, Faber K, Movsas B, Ryu S. 2062. Int J Radiat Oncol Biol Phys 2006. [DOI: 10.1016/j.ijrobp.2006.07.465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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94
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Schwalbe CH, Jin R, Wang H, Zhao K, Wang YF. Hydrogen bonded hexagonal rings: effect on molecular geometry. Acta Crystallogr A 2006. [DOI: 10.1107/s0108767306096425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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95
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Jin R, Hodges CA, Drumm ML, Palmert MR. The cystic fibrosis transmembrane conductance regulator (Cftr) modulates the timing of puberty in mice. J Med Genet 2006; 43:e29. [PMID: 16740913 PMCID: PMC2564546 DOI: 10.1136/jmg.2005.032839] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND Delayed puberty is common among individuals with cystic fibrosis (CF) and is usually attributed to chronic disease and/or poor nutrition. However, it has recently been recognised that pubertal delay can occur even in the setting of good nutritional and clinical status. This finding, along with evidence that Cftr is expressed in rat brain, human hypothalamus, and a gonadotropin releasing hormone secreting cell line, raises the possibility that some of the pubertal delay in CF could stem directly from alterations in Cftr function that affect the hypothalamic-pituitary-gonadal axis. METHODS To examine this hypothesis, we investigated pubertal timing (as assessed by vaginal opening (VO)) in a mouse model of CF (Cftr(tm1Unc)) engineered to produce a truncated Cftr mRNA and referred to as S489X. Homozygous knockout, heterozygote, and wild type (WT) female mice were examined. RESULTS As expected, the S489X-/S489X- knockout mice, which have chronic inflammation and gastrointestinal disease, grew more slowly and had later onset of puberty than WT animals. We anticipated that the S489X-/S489X+ heterozygotes, which have no clinical CF phenotype, might display an intermediate timing of puberty. Surprisingly, however, these mice had earlier VO than WT. These findings were confirmed in a second, independent model of CF engineered to generate the deltaF508 mutation in mice. Again, the homozygotes displayed later pubertal timing, while the heterozygotes displayed earlier VO than the WT animals. CONCLUSIONS These data provide further evidence that Cftr can directly modulate the reproductive endocrine axis and raise the possibility that heterozygote mutation carriers may have a reproductive advantage.
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Wang F, Alvarez JV, Mo SK, Allen JW, Gweon GH, He J, Jin R, Mandrus D, Höchst H. New Luttinger-liquid physics from photoemission on Li0.9M06O17. PHYSICAL REVIEW LETTERS 2006; 96:196403. [PMID: 16803117 DOI: 10.1103/physrevlett.96.196403] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2006] [Indexed: 05/10/2023]
Abstract
Temperature dependent high resolution photoemission spectra of quasi-one-dimensional Li(0.9)Mo(6)O(17)evince a strong renormalization of its Luttinger-liquid density-of-states anomalous exponent. We trace this new effect to interacting charge neutral critical modes that emerge naturally from the two-band nature of the material. Li(0.9)Mo(6)O(17) is shown thereby to be a paradigm material that is capable of revealing new Luttinger physics.
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97
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Zhang J, Moore RG, Wang SC, Ding H, Jin R, Mandrus D, Plummer EW. Dopant-induced nanoscale electronic inhomogeneities in Ca(2-x)Sr(x)RuO4. PHYSICAL REVIEW LETTERS 2006; 96:066401. [PMID: 16615176 DOI: 10.1103/physrevlett.96.066401] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Ca(2-x)Sr(x)RuO4 single crystals with 0.1 < or = x < or = 2.0 have been studied systematically using scanning tunneling microscopy (STM) and spectroscopy, low-energy electron diffraction, and angle resolved photoelectron spectroscopy (ARPES). In contrast with the well-ordered lattice structure, the local density of states at the surface clearly shows a strong doping dependent nanoscale electronic inhomogeneity, regardless of the fact of isovalent substitution. Remarkably, the surface electronic roughness measured by STM and the inverse spectral weight of quasiparticle states determined by ARPES are found to vary with x in the same manner as the bulk in-plane residual resistivity, following the Nordheim rule. For the first time, the surface measurements--especially those with STM--are shown to be in good agreement with the bulk transport results, all clearly indicating a doping-induced electronic disorder in the system.
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98
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Greenwald A, Jin R, Peterson M, Waddell T. 144. J Heart Lung Transplant 2006. [DOI: 10.1016/j.healun.2005.11.150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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99
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Marcellin P, Bonino F, Lau G, Farci P, Yurdaydin C, Piratvisuth T, Jin R, Gurel S, Hadziyannis S, Lu Z, Popescu M. P.112 Response is sustained two years post-treatment in the majority of patients with HBeAg-negative chronic hepatitis B treated with peginterferon alpha-2a (40KD) [PEGASYS®]. J Clin Virol 2006. [DOI: 10.1016/s1386-6532(06)80294-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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100
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Hager J, Matzdorf R, He J, Jin R, Mandrus D, Cazalilla MA, Plummer EW. Non-fermi-liquid behavior in quasi-one-dimensional Li0.9Mo6O17. PHYSICAL REVIEW LETTERS 2005; 95:186402. [PMID: 16383925 DOI: 10.1103/physrevlett.95.186402] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/15/2005] [Indexed: 05/05/2023]
Abstract
We present temperature dependent scanning tunneling spectroscopy data of the quasi-one-dimensional conductor Li0.9Mo6O17. The differential tunneling current in our low-temperature spectra shows a power-law behavior around the Fermi energy, which is expected for a clean Luttinger liquid. The power-law exponent is found to be 0.6. Spectra for a temperature range of 5 to 55 K can be fitted fairly well with a model for tunneling into a Luttinger liquid at the appropriate temperature. A fit with a model based on a zero bias anomaly is significantly worse compared to the Luttinger liquid model. No signature of a phase transition at T = 24 K is observed in our temperature dependent data.
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