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Boulet C, Ma Q, Tipping RH. Line mixing in parallel and perpendicular bands of CO2: A further test of the refined Robert-Bonamy formalism. J Chem Phys 2015; 143:124313. [PMID: 26429017 DOI: 10.1063/1.4931587] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Starting from the refined Robert-Bonamy formalism [Q. Ma, C. Boulet, and R. H. Tipping, J. Chem. Phys. 139, 034305 (2013)], we propose here an extension of line mixing studies to infrared absorptions of linear polyatomic molecules having stretching and bending modes. The present formalism does not neglect the internal degrees of freedom of the perturbing molecules, contrary to the energy corrected sudden (ECS) modelling, and enables one to calculate the whole relaxation matrix starting from the potential energy surface. Meanwhile, similar to the ECS modelling, the present formalism properly accounts for roles played by all the internal angular momenta in the coupling process, including the vibrational angular momentum. The formalism has been applied to the important case of CO2 broadened by N2. Applications to two kinds of vibrational bands (Σ → Σ and Σ → Π) have shown that the present results are in good agreement with both experimental data and results derived from the ECS model.
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Liu A, Wang C, Liang Z, Zhou ZW, Wang L, Ma Q, Wang G, Zhou SF, Wang Z. High-throughput sequencing of 16S rDNA amplicons characterizes bacterial composition in cerebrospinal fluid samples from patients with purulent meningitis. Drug Des Devel Ther 2015; 9:4417-29. [PMID: 26300628 PMCID: PMC4535540 DOI: 10.2147/dddt.s82728] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Purulent meningitis (PM) is a severe infectious disease that is associated with high rates of morbidity and mortality. It has been recognized that bacterial infection is a major contributing factor to the pathogenesis of PM. However, there is a lack of information on the bacterial composition in PM, due to the low positive rate of cerebrospinal fluid bacterial culture. Herein, we aimed to discriminate and identify the main pathogens and bacterial composition in cerebrospinal fluid sample from PM patients using high-throughput sequencing approach. The cerebrospinal fluid samples were collected from 26 PM patients, and were determined as culture-negative samples. The polymerase chain reaction products of the hypervariable regions of 16S rDNA gene in these 26 samples of PM were sequenced using the 454 GS FLX system. The results showed that there were 71,440 pyrosequencing reads, of which, the predominant phyla were Proteobacteria and Firmicutes; and the predominant genera were Streptococcus, Acinetobacter, Pseudomonas, and Neisseria. The bacterial species in the cerebrospinal fluid were complex, with 61.5% of the samples presenting with mixed pathogens. A significant number of bacteria belonging to a known pathogenic potential was observed. The number of operational taxonomic units for individual samples ranged from six to 75 and there was a comparable difference in the species diversity that was calculated through alpha and beta diversity analysis. Collectively, the data show that high-throughput sequencing approach facilitates the characterization of the pathogens in cerebrospinal fluid and determine the abundance and the composition of bacteria in the cerebrospinal fluid samples of the PM patients, which may provide a better understanding of pathogens in PM and assist clinicians to make rational and effective therapeutic decisions.
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Dai S, Ma Q, Liu MK, Andersen T, Fei Z, Goldflam MD, Wagner M, Watanabe K, Taniguchi T, Thiemens M, Keilmann F, Janssen GCAM, Zhu SE, Jarillo-Herrero P, Fogler MM, Basov DN. Graphene on hexagonal boron nitride as a tunable hyperbolic metamaterial. NATURE NANOTECHNOLOGY 2015; 10:682-6. [PMID: 26098228 DOI: 10.1038/nnano.2015.131] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 05/25/2015] [Indexed: 05/11/2023]
Abstract
Hexagonal boron nitride (h-BN) is a natural hyperbolic material, in which the dielectric constants are the same in the basal plane (ε(t) ≡ ε(x) = ε(y)) but have opposite signs (ε(t)ε(z) < 0) in the normal plane (ε(z)). Owing to this property, finite-thickness slabs of h-BN act as multimode waveguides for the propagation of hyperbolic phonon polaritons--collective modes that originate from the coupling between photons and electric dipoles in phonons. However, control of these hyperbolic phonon polaritons modes has remained challenging, mostly because their electrodynamic properties are dictated by the crystal lattice of h-BN. Here we show, by direct nano-infrared imaging, that these hyperbolic polaritons can be effectively modulated in a van der Waals heterostructure composed of monolayer graphene on h-BN. Tunability originates from the hybridization of surface plasmon polaritons in graphene with hyperbolic phonon polaritons in h-BN, so that the eigenmodes of the graphene/h-BN heterostructure are hyperbolic plasmon-phonon polaritons. The hyperbolic plasmon-phonon polaritons in graphene/h-BN suffer little from ohmic losses, making their propagation length 1.5-2.0 times greater than that of hyperbolic phonon polaritons in h-BN. The hyperbolic plasmon-phonon polaritons possess the combined virtues of surface plasmon polaritons in graphene and hyperbolic phonon polaritons in h-BN. Therefore, graphene/h-BN can be classified as an electromagnetic metamaterial as the resulting properties of these devices are not present in its constituent elements alone.
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Song JP, Ma Q, Shuang SM, Guo Y, Dong C. Self-assembly, crystal structure, and spectroscopy properties of two new complexes with 1,10-phenanthroline-5,6-dione and SCN ligands. RUSS J COORD CHEM+ 2015. [DOI: 10.1134/s107032841507009x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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130
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Tsukasaki Y, Komatsuzaki A, Mori Y, Ma Q, Yoshioka Y, Jin T. A short-wavelength infrared emitting multimodal probe for non-invasive visualization of phagocyte cell migration in living mice. Chem Commun (Camb) 2015; 50:14356-9. [PMID: 25296382 DOI: 10.1039/c4cc06542e] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For the non-invasive visualization of cell migration in deep tissues, we synthesized a short-wavelength infrared (SWIR) emitting multimodal probe that contains PbS/CdS quantum dots, rhodamine 6G and iron oxide nanoparticles. This probe enables multimodal (SWIR fluorescence/magnetic resonance) imaging of phagocyte cell migration in living mice.
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Jiang HY, Li Z, Zhao J, Ma Q, Cheng BJ, Zhu SW. Screening relevant genes of tolerance to low phosphorus in maize using cDNA-amplified fragment length polymorphism. GENETICS AND MOLECULAR RESEARCH 2015; 14:5731-41. [PMID: 26125772 DOI: 10.4238/2015.may.29.5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Soil contains a large amount of phosphorus, but plants cannot absorb most of this phosphorus effectively. Low inorganic phosphorus has been singled out as a major constraint that leads to a perpetually low Zea mays (maize) grain yield. The fundamental approach to solving this problem is to screen new genes of low phosphorous (LP) tolerance. Consequently, the exploration and utilization of LP-tolerant genes are of great significance in plants. The maize inbred line 178 is an inbred LP-tolerant line. In the current study, the expression of this inbred line was induced under the stress of LP conditions. We applied cDNA-amplified fragment length polymorphism to screen LP-tolerant genes and obtained and sequenced 78 differentially expressed gene fragments. Their functions were predicted via bioinformatic analysis. There were no function annotations for 8 differentially expressed fragments. Nine genes exhibited high homology to Arabidopsis thaliana and Oryza sativa genes involved in phosphorus metabolism. This study lays a good foundation for further cloning and verification of the genes involved in phosphorus metabolism in maize.
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Su L, An J, Ma Q, Qiu S, Hu D. Influence of Resting-State Network on Lateralization of Functional Connectivity in Mesial Temporal Lobe Epilepsy. AJNR Am J Neuroradiol 2015; 36:1479-87. [PMID: 26021622 DOI: 10.3174/ajnr.a4346] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2014] [Accepted: 01/25/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND AND PURPOSE Although most studies on epilepsy have focused on the epileptogenic zone, epilepsy is a system-level disease characterized by aberrant neuronal synchronization among groups of neurons. Increasingly, studies have indicated that mesial temporal lobe epilepsy may be a network-level disease; however, few investigations have examined resting-state functional connectivity of the entire brain, particularly in patients with mesial temporal lobe epilepsy and hippocampal sclerosis. This study primarily investigated whole-brain resting-state functional connectivity abnormality in patients with mesial temporal lobe epilepsy and right hippocampal sclerosis during the interictal period. MATERIALS AND METHODS We investigated resting-state functional connectivity of 21 patients with mesial temporal lobe epilepsy with right hippocampal sclerosis and 21 neurologically healthy controls. A multivariate pattern analysis was used to identify the functional connections that most clearly differentiated patients with mesial temporal lobe epilepsy with right hippocampal sclerosis from controls. RESULTS Discriminative analysis of functional connections indicated that the patients with mesial temporal lobe epilepsy with right hippocampal sclerosis exhibited decreased resting-state functional connectivity within the right hemisphere and increased resting-state functional connectivity within the left hemisphere. Resting-state network analysis suggested that the internetwork connections typically obey the hemispheric lateralization trend and most of the functional connections that disturb the lateralization trend are the intranetwork ones. CONCLUSIONS The current findings suggest that weakening of the resting-state functional connectivity associated with the right hemisphere appears to strengthen resting-state functional connectivity on the contralateral side, which may be related to the seizure-induced damage and underlying compensatory mechanisms. Resting-state network-based analysis indicated that the compensatory mechanism among different resting-state networks may disturb the hemispheric lateralization.
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Ding Y, Chang J, Ma Q, Chen L, Liu S, Jin S, Han J, Xu R, Zhu A, Guo J, Luo Y, Xu J, Xu Q, Zeng Y, Deng X, Cheng Y. Network analysis of postharvest senescence process in citrus fruits revealed by transcriptomic and metabolomic profiling. PLANT PHYSIOLOGY 2015; 168:357-76. [PMID: 25802366 PMCID: PMC4424016 DOI: 10.1104/pp.114.255711] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 03/19/2015] [Indexed: 05/04/2023]
Abstract
Citrus (Citrus spp.), a nonclimacteric fruit, is one of the most important fruit crops in global fruit industry. However, the biological behavior of citrus fruit ripening and postharvest senescence remains unclear. To better understand the senescence process of citrus fruit, we analyzed data sets from commercial microarrays, gas chromatography-mass spectrometry, and liquid chromatography-mass spectrometry and validated physiological quality detection of four main varieties in the genus Citrus. Network-based approaches of data mining and modeling were used to investigate complex molecular processes in citrus. The Citrus Metabolic Pathway Network and correlation networks were constructed to explore the modules and relationships of the functional genes/metabolites. We found that the different flesh-rind transport of nutrients and water due to the anatomic structural differences among citrus varieties might be an important factor that influences fruit senescence behavior. We then modeled and verified the citrus senescence process. As fruit rind is exposed directly to the environment, which results in energy expenditure in response to biotic and abiotic stresses, nutrients are exported from flesh to rind to maintain the activity of the whole fruit. The depletion of internal substances causes abiotic stresses, which further induces phytohormone reactions, transcription factor regulation, and a series of physiological and biochemical reactions.
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Tielrooij KJ, Piatkowski L, Massicotte M, Woessner A, Ma Q, Lee Y, Myhro KS, Lau CN, Jarillo-Herrero P, van Hulst NF, Koppens FHL. Generation of photovoltage in graphene on a femtosecond timescale through efficient carrier heating. NATURE NANOTECHNOLOGY 2015; 10:437-43. [PMID: 25867941 DOI: 10.1038/nnano.2015.54] [Citation(s) in RCA: 97] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Accepted: 02/23/2015] [Indexed: 05/13/2023]
Abstract
Graphene is a promising material for ultrafast and broadband photodetection. Earlier studies have addressed the general operation of graphene-based photothermoelectric devices and the switching speed, which is limited by the charge carrier cooling time, on the order of picoseconds. However, the generation of the photovoltage could occur at a much faster timescale, as it is associated with the carrier heating time. Here, we measure the photovoltage generation time and find it to be faster than 50 fs. As a proof-of-principle application of this ultrafast photodetector, we use graphene to directly measure, electrically, the pulse duration of a sub-50 fs laser pulse. The observation that carrier heating is ultrafast suggests that energy from absorbed photons can be efficiently transferred to carrier heat. To study this, we examine the spectral response and find a constant spectral responsivity of between 500 and 1,500 nm. This is consistent with efficient electron heating. These results are promising for ultrafast femtosecond and broadband photodetector applications.
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Tielrooij KJ, Massicotte M, Piatkowski L, Woessner A, Ma Q, Jarillo-Herrero P, van Hulst NF, Koppens FHL. Hot-carrier photocurrent effects at graphene-metal interfaces. JOURNAL OF PHYSICS. CONDENSED MATTER : AN INSTITUTE OF PHYSICS JOURNAL 2015; 27:164207. [PMID: 25835338 DOI: 10.1088/0953-8984/27/16/164207] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
Photoexcitation of graphene leads to an interesting sequence of phenomena, some of which can be exploited in optoelectronic devices based on graphene. In particular, the efficient and ultrafast generation of an electron distribution with an elevated electron temperature and the concomitant generation of a photo-thermoelectric voltage at symmetry-breaking interfaces is of interest for photosensing and light harvesting. Here, we experimentally study the generated photocurrent at the graphene-metal interface, focusing on the time-resolved photocurrent, the effects of photon energy, Fermi energy and light polarization. We show that a single framework based on photo-thermoelectric photocurrent generation explains all experimental results.
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Dai S, Ma Q, Andersen T, Mcleod AS, Fei Z, Liu MK, Wagner M, Watanabe K, Taniguchi T, Thiemens M, Keilmann F, Jarillo-Herrero P, Fogler MM, Basov DN. Subdiffractional focusing and guiding of polaritonic rays in a natural hyperbolic material. Nat Commun 2015; 6:6963. [PMID: 25902364 PMCID: PMC4421822 DOI: 10.1038/ncomms7963] [Citation(s) in RCA: 165] [Impact Index Per Article: 18.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 03/19/2015] [Indexed: 12/24/2022] Open
Abstract
Uniaxial materials whose axial and tangential permittivities have opposite signs are referred to as indefinite or hyperbolic media. In such materials, light propagation is unusual leading to novel and often non-intuitive optical phenomena. Here we report infrared nano-imaging experiments demonstrating that crystals of hexagonal boron nitride, a natural mid-infrared hyperbolic material, can act as a ‘hyper-focusing lens' and as a multi-mode waveguide. The lensing is manifested by subdiffractional focusing of phonon–polaritons launched by metallic disks underneath the hexagonal boron nitride crystal. The waveguiding is revealed through the modal analysis of the periodic patterns observed around such launchers and near the sample edges. Our work opens new opportunities for anisotropic layered insulators in infrared nanophotonics complementing and potentially surpassing concurrent artificial hyperbolic materials with lower losses and higher optical localization. Hexagonal boron nitride has many interesting properties, including a natural hyperbolic dispersion, making it attractive for nanophotonic applications. Here, Dai et al. show that metallic disks under the material launch phonon–polaritons, turning it into a hyper-focusing lens.
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Zhang M, Li Y, Ma Q, Mao W, Gao Y, Liu Y, Liang B. Relevance of parathyroid hormone (PTH), vitamin 25(OH)D3, calcitonin (CT), bone metabolic markers, and bone mass density (BMD) in 860 female cases. CLIN EXP OBSTET GYN 2015. [DOI: 10.12891/ceog1725.2015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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Yu X, Zeng L, Zhou N, Guo P, Shi F, Buchholz DB, Ma Q, Yu J, Dravid VP, Chang RPH, Bedzyk M, Marks TJ, Facchetti A. Ultra-flexible, "invisible" thin-film transistors enabled by amorphous metal oxide/polymer channel layer blends. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:2390-9. [PMID: 25712894 DOI: 10.1002/adma.201405400] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/25/2014] [Revised: 01/24/2015] [Indexed: 05/26/2023]
Abstract
Ultra-flexible and transparent metal oxide transistors are developed by doping In2 O3 films with poly(vinylphenole) (PVP). By adjusting the In2 O3 :PVP weight ratio, crystallization is frustrated, and conducting pathways for efficient charge transport are maintained. In2 O3 :5%PVP-based transistors exhibit mobilities approaching 11 cm(2) V(-1) s(-1) before, and retain up to ca. 90% performance after 100 bending/relaxing cycles at a radius of 10 mm.
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Cao H, Wang J, Dong X, Han Y, Ma Q, Ding Y, Zhao F, Zhang J, Chen H, Xu Q, Xu J, Deng X. Carotenoid accumulation affects redox status, starch metabolism, and flavonoid/anthocyanin accumulation in citrus. BMC PLANT BIOLOGY 2015; 15:27. [PMID: 25644332 PMCID: PMC4323224 DOI: 10.1186/s12870-015-0426-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Accepted: 01/15/2015] [Indexed: 05/25/2023]
Abstract
BACKGROUND Carotenoids are indispensable plant secondary metabolites that are involved in photosynthesis, antioxidation, and phytohormone biosynthesis. Carotenoids are likely involved in other biological functions that have yet to be discovered. In this study, we integrated genomic, biochemical, and cellular studies to gain deep insight into carotenoid-related biological processes in citrus calli overexpressing CrtB (phytoene synthase from Pantoea agglomerans). Fortunella hindsii Swingle (a citrus relative) and Malus hupehensis (a wild apple) calli were also utilized as supporting systems to investigate the effect of altered carotenoid accumulation on carotenoid-related biological processes. RESULTS Transcriptomic analysis provided deep insight into the carotenoid-related biological processes of redox status, starch metabolism, and flavonoid/anthocyanin accumulation. By applying biochemical and cytological analyses, we determined that the altered redox status was associated with variations in O2 (-) and H2O2 levels. We also ascertained a decline in starch accumulation in carotenoid-rich calli. Furthermore, via an extensive cellular investigation of the newly constructed CrtB overexpressing Fortunella hindsii Swingle, we demonstrated that starch level reducation occurred in parallel with significant carotenoid accumulation. Moreover, studying anthocyanin-rich Malus hupehensis calli showed a negative effect of carotenoids on anthocyanin accumulation. CONCLUSIONS In citrus, altered carotenoid accumulation resulted in dramatic effects on metabolic processes involved in redox modification, starch degradation, and flavonoid/anthocyanin biosynthesis. These findings provided new perspectives to understand the biological importance of carotenogenesis and of the developmental processes associated with the nutritional and sensory qualities of agricultural products that accumulate carotenoids.
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Ma G, Zhang X, Ma Q, Rong T, Long H, Lin P, Fu J, Zhang L. A novel multivariate scoring system for determining the prognosis of lymph node-negative esophageal squamous cell carcinoma following surgical therapy: an observational study. Eur J Surg Oncol 2015; 41:541-7. [PMID: 25659876 DOI: 10.1016/j.ejso.2015.01.013] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 12/06/2014] [Accepted: 01/15/2015] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Identifying patients with esophageal squamous cell carcinoma (ESCC) with negative prognostic factors, which have an extremely low survival rate, has been problematic. METHODS We retrospectively collected clinical data for 648 patients with lymph node-negative ESCC who were treated at the Sun Yat-Sen University Cancer Center from 1990 to 2005. Survival difference was compared using Kaplan-Meier analysis and multivariate Cox regression analysis. RESULTS We identified advancing age, smoking history, alcohol consumption history, decreased forced expiratory volume in 1 s (FEV1), surgical procedure, tumor location, number of resected lymph nodes, poor tumor differentiation, and surgical stage as independent prognostic risk factors. Furthermore, based on the results of multivariate analysis, we constructed a novel scoring system that included the factors of age, smoking history, alcohol consumption history, number of resected lymph nodes, tumor differentiation, and surgical stage. Risk score (RS) was computed with the scoring system, and patients were divided into Class A (RS: 0-5) and Class B (RS: 6-10). P < 0.001 indicated statistical significance. A significant difference (p < 0.001) demonstrated that Class B was strongly related to a low survival rate and poor prognosis. CONCLUSION We developed a new simple flexible scoring system of high prognostic significance, which has the potential to guide postoperative therapeutic strategies and follow-up frequency and to provide better prognostic information for patients and their families.
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Feng Z, Ma Q, Lu J, Feng H, Elam JW, Stair PC, Bedzyk MJ. Atomic-scale cation dynamics in a monolayer VOX/α-Fe2O3 catalyst. RSC Adv 2015. [DOI: 10.1039/c5ra18404e] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
A combination of in situ XAS and FTIR shows the redox-induced vanadium cation dynamics on the surfaces of Fe2O3 powders.
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Zhang M, Li Y, Ma Q, Mao W, Gao Y, Liu Y, Liang B. Relevance of parathyroid hormone (PTH), vitamin 25(OH)D3, calcitonin (CT), bone metabolic markers, and bone mass density (BMD) in 860 female cases. CLIN EXP OBSTET GYN 2015; 42:129-132. [PMID: 26054103] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE To study the relevance of PTH, 25(OH)D3, CT, bone resorption markers C-terminal telopeptide of type I (CTX-1), and tartrate-resistant acid phosphatase (TRACP), bone formation markers bone gla protein (BGP), bone alkaline phosphatase (BALP) with the femoral neck BMD in females. MATERIALS AND METHODS PTH, 25(OH)D3, CT, CTX-1, TRACP, BGP, and BALP were detected by an enzyme immunoassay analyzer and femoral neck BMD were measured by a BMD detector. The results of 860 females were divided into several groups according to standard of five-year age intervals. SPSS 13.0 software was used for statistical analysis. RESULTS The measured values of PTH, 25(OH) D3 and CT had no differences in 35-50 age group. The measured values of 25(OH) D3 began to decline after the age of 50, and 25(OH)D3 had positive relevance with BMD. The values of CT were decreased in the age groups from 65 to 79 years old, and were significant positive correlated with BMD. The CTX-1 and TRACP had negative relevance with BMD in 35-45 age group and BGP and BALP had positive relevance with BMD in 35-45 age group. The BGP, BALP increased significantly in 50-60 age group, and CTX-1, TRACP, BGP, and BALP had negative relevance with BMD in 50-60 age group. BGP and BALP began to decline and had positive relevance with BMD after the age of 65, and CTX-1 and TRACP had negative relevance with BMD after the age of 65. CONCLUSIONS PTH, 25(OH)D3, CT, CTX-1, TRACP, BGP, and BALP were the important technical means for monitoring the level of bone metabolism and the diagnosis and differential diagnosis of osteoporosis.
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Verbraeken MC, Ramos T, Agersted K, Ma Q, Savaniu CD, Sudireddy BR, Irvine JTS, Holtappels P, Tietz F. Modified strontium titanates: from defect chemistry to SOFC anodes. RSC Adv 2015. [DOI: 10.1039/c4ra09751c] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A review describing how compositional design of modified strontium titanates can lead to conductive, redox stable SOFC anodes.
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Li X, Liu F, Hu Y, Xia M, Cheng B, Zhu S, Ma Q. Overexpression of an endo-1,4-β-glucanase V gene (EGV) from Trichoderma reesei leads to the accumulation of cellulase activity in transgenic rice. GENETICS AND MOLECULAR RESEARCH 2015; 14:17519-28. [DOI: 10.4238/2015.december.21.24] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Ma Q, Zhao Z, Barber B, Shilkrut M. Use Patterns and Costs of Isolated Limb Perfusion and Infusion in the Treatment of Regionally Metastatic Melanoma: A Retrospective Database Analysis. VALUE IN HEALTH : THE JOURNAL OF THE INTERNATIONAL SOCIETY FOR PHARMACOECONOMICS AND OUTCOMES RESEARCH 2014; 17:A629. [PMID: 27202232 DOI: 10.1016/j.jval.2014.08.2248] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
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Yu DL, Wei YL, Liu L, Cao JY, Ma Q, Chen WJ, Liu Y, Yan LW, Yang QW, Duan XR. Progress of neutral-beam-aided diagnostics on the HL-2A tokamak. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:11E402. [PMID: 25430309 DOI: 10.1063/1.4886419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A 32/64-channel Charge eXchange Recombination Spectroscopy (CXRS) and a 7-channel motional Stark effect (MSE) polarimeter have been developed on the HL-2A tokamak. To extract the maximum time resolution of the system, the incidence fibers of the spectrometer are pitch-controlled; and the double-slit fiber bundle can increase the spatial channels with one charge-coupled device detector. The ion temperature and plasma rotation with time and spatial resolutions up to 5 ms and 1 cm are obtained. Sawtooth oscillation, transition from intermediate phase (I phase) to high confinement mode (H mode) can be clearly observed by the CXRS. The spectrometer can be utilized as the main component of the MSE polarimeter, which can effectively overcome the weak Stark effect. The pitch angles of magnetic field are obtained for 7 spatial points covering 24 cm along major radius with time resolution of 40 ms.
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Wei YL, Yu DL, Liu L, Ida K, von Hellermann M, Cao JY, Sun AP, Ma Q, Chen WJ, Liu Y, Yan LW, Yang QW, Duan XR, Liu Y. High spatial and temporal resolution charge exchange recombination spectroscopy on the HL-2A tokamak. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2014; 85:103503. [PMID: 25362389 DOI: 10.1063/1.4897186] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
A 32/64-channel charge exchange recombination spectroscopy (CXRS) diagnostic system is developed on the HL-2A tokamak (R = 1.65 m, a = 0.4 m), monitoring plasma ion temperature and toroidal rotation velocity simultaneously. A high throughput spectrometer (F/2.8) and a pitch-controlled fiber bundle enable the temporal resolution of the system up to 400 Hz. The observation geometry and an optimized optic system enable the highest radial resolution up to ∼1 cm at the plasma edge. The CXRS system monitors the carbon line emission (C VI, n = 8-7, 529.06 nm) whose Doppler broadening and Doppler shift provide ion temperature and plasma rotation velocity during the neutral beam injection. The composite CX spectral data are analyzed by the atomic data and analysis structure charge exchange spectroscopy fitting (ADAS CXSFIT) code. First experimental results are shown for the case of HL-2A plasmas with sawtooth oscillations, electron cyclotron resonance heating, and edge transport barrier during the high-confinement mode (H-mode).
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Huang Z, Li S, Ma Q, Fan W, Wang Y, Xiao Z. Microrna-224 stimulates the expression of matrix metalloproteinase (MMP)-2 and MMP-9 in human trophoblast cell line JEG-3 via TGF-β/SMAD3 pathway. Fertil Steril 2014. [DOI: 10.1016/j.fertnstert.2014.07.807] [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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Ma Q, Zhao Z, Barber B, Shilkrut M. Use Patterns and Costs of Isolated Limb Perfusion and Infusion in the Treatment of Regionally Metastatic Melanoma: a Retrospective Database Analysis. Ann Oncol 2014. [DOI: 10.1093/annonc/mdu344.34] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Ma Q, Boulet C, Tipping RH. Effects on calculated half-widths and shifts from the line coupling for asymmetric-top molecules. J Chem Phys 2014; 140:244301. [PMID: 24985632 DOI: 10.1063/1.4883058] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
The refinement of the Robert-Bonamy formalism by considering the line coupling for linear molecules developed in our previous studies [Q. Ma, C. Boulet, and R. H. Tipping, J. Chem. Phys. 139, 034305 (2013); 140, 104304 (2014)] have been extended to asymmetric-top molecules. For H2O immersed in N2 bath, the line coupling selection rules applicable for the pure rotational band to determine whether two specified lines are coupled or not are established. Meanwhile, because the coupling strengths are determined by relative importance of off-diagonal matrix elements versus diagonal elements of the operator -iS1 - S2, quantitative tools are developed with which one is able to remove weakly coupled lines from consideration. By applying these tools, we have found that within reasonable tolerances, most of the H2O lines in the pure rotational band are not coupled. This reflects the fact that differences of energy levels of the H2O states are pretty large. But, there are several dozen strongly coupled lines and they can be categorized into different groups such that the line couplings occur only within the same groups. In practice, to identify those strongly coupled lines and to confine them into sub-linespaces are crucial steps in considering the line coupling. We have calculated half-widths and shifts for some groups, including the line coupling. Based on these calculations, one can conclude that for most of the H2O lines, it is unnecessary to consider the line coupling. However, for several dozens of lines, effects on the calculated half-widths from the line coupling are small, but remain noticeable and reductions of calculated half-widths due to including the line coupling could reach to 5%. Meanwhile, effects on the calculated shifts are very significant and variations of calculated shifts could be as large as 25%.
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