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Wang J, Xia T, Ma L, Qu B, Pan L, Zhou G, Ju Z, Xie C, Guo Y. Primary Outcomes in Phase 2 Study of Hypofractionated Patterns by Stereotactic Ablative Radiation Therapy (SABR). Int J Radiat Oncol Biol Phys 2013. [DOI: 10.1016/j.ijrobp.2013.06.467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Jia MY, Pan L, Xue P, Wang KJ, Jin XM. Studies on the Effect of Pellet Size on Positive Conveying in Helically Grooved Single Screw Extruders. INT POLYM PROC 2013. [DOI: 10.3139/217.2709] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
The helical grooved barrel feed section permits, when the barrel channel aspect ratio and the barrel channel helical angle are properly designed, an operating mode where the positive conveying is prevailing. While the pellet size of materials is varied, different dimension relationships of the barrel channel depth and pellet size could induce different equivalent barrel channel aspect ratios with the transformation of solids conveying mechanisms from the positive conveying to the friction-drag conveying. Considering the effect of dimension relationships on the solids conveying mechanism, a novel pellet-size physical model was established to guide the available design of the barrel channel geometry for positive conveying. In the pellet-size model, one or two shear interfaces were identified inside the solid-plug resulting in different equivalent barrel channel aspect ratios, based on which the solids conveying mechanism on the shear interfaces was detailed by the boundary condition equations for positive conveying. Besides, the theoretical simulations are also compared with the on-line measuring experimental data. The results show that the equivalent barrel channel aspect ratio on the shear interfaces exists indeed and determines the solids conveying mechanism, which is well confirmed by the excellent consistence between the predicted and measured data.
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Zhang RX, Zhang M, Li A, Pan L, Berman BM, Ren K, Lao L. DAMGO in the central amygdala alleviates the affective dimension of pain in a rat model of inflammatory hyperalgesia. Neuroscience 2013; 252:359-66. [PMID: 23994597 DOI: 10.1016/j.neuroscience.2013.08.030] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Accepted: 08/19/2013] [Indexed: 10/26/2022]
Abstract
Pain has sensory-discriminative and emotional-affective dimensions. Recent studies show that the affective component can be assessed with a conditioned place avoidance (CPA) test. We hypothesized that systemic morphine before a post-conditioning test would more potently attenuate the affective aspect compared to the sensory component and that [d-Ala2-N-Me-Phe4, Gly-ol5]-enkephalin (DAMGO), a μ-selective opioid receptor agonist, injected into the central nucleus of the amygdala (CeA) would reduce established CPA. A rat model of inflammatory pain, produced by a complete Freund adjuvant (CFA) injection into the hind paw, was combined with a CPA test. Three experiments were performed on adult male Sprague-Dawley rats. Systemic morphine (0.5 or 1.0mg/kg) in Experiment 1, intrathecal (i.t.) morphine (2.5 μg/rat) in Experiment 2, and intra-CeA DAMGO (7.7-15.4 ng/0.4 μl) in Experiment 3 were given to CFA-injected rats (n=6-8/group) prior to a post-conditioning test. Saline-injected rats were used as control. Time spent in a pain-paired compartment was recorded twice, before conditioning and after a post-conditioning test. Paw withdrawal latency (PWL) to a noxious thermal stimulus was measured before experiment at day-1 and after the post-conditioning test; hyperalgesia was defined as a decrease in PWL. The data showed that CFA-injected rats had significantly negative CPA compared to those of saline-injected rats (P<0.05). Low-dosage systemic morphine significantly (P<0.05) reduced CFA-induced CPA but had no effect on PWL. I.t. morphine did not inhibit the display of CPA but significantly increased PWL, suppressing hyperalgesia (P<0.05). Intra-CeA DAMGO significantly inhibited the display of CPA compared to saline (P<0.05) but had no effect on PWL. The data demonstrate that morphine attenuates the affective component more powerfully than it does the sensory and suggests that the sensory and the emotional-affective dimensions are underpinned by different mechanisms.
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Li J, Qu Y, Chen D, Zhang L, Zhao F, Luo L, Pan L, Hua J, Mu D. The neuroprotective role and mechanisms of TERT in neurons with oxygen-glucose deprivation. Neuroscience 2013; 252:346-58. [PMID: 23968592 DOI: 10.1016/j.neuroscience.2013.08.015] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 07/24/2013] [Accepted: 08/09/2013] [Indexed: 01/14/2023]
Abstract
Telomerase reverse transcriptase (TERT) is reported to protect neurons from apoptosis induced by various stresses including hypoxia-ischemia (HI). However, the mechanisms by which TERT exerts its anti-apoptotic role in neurons with HI injury remain unclear. In this study, we examined the protective role and explored the possible mechanisms of TERT in neurons with HI injury in vitro. Primary cultured neurons were exposed to oxygen and glucose deprivation (OGD) for 3h followed by reperfusion to mimic HI injury in vivo. Plasmids containing TERT antisense, sense nucleotides, or mock were transduced into neurons at 48h before OGD. Expression and distribution of TERT were measured by immunofluorescence labeling and western blot. The expression of cleaved caspase 3 (CC3), Bcl-2 and Bax were detected by western blot. Neuronal apoptosis was measured with terminal deoxynucleotidyl transferase-mediated dUTP nick end-labeling (TUNEL). The mitochondrial reactive oxygen species (ROS) were measured by MitoSOX Red staining. Fluorescent probe JC-1 was used to measure the mitochondrial membrane potential (ΔΨm). We found that TERT expression increased at 8h and peaked at 24h in neurons after OGD. CC3 expression and neuronal apoptosis were induced and peaked at 24h after OGD. TERT inhibition significantly increased CC3 expression and neuronal apoptosis after OGD treatment. Additionally, TERT inhibition decreased the expression ratio of Bcl-2/Bax, and enhanced ROS production and ΔΨm dissipation after OGD. These data suggest that TERT plays a neuroprotective role via anti-apoptosis in neurons after OGD. The underlying mechanisms may be associated with regulating Bcl-2/Bax expression ratio, attenuating ROS generation, and increasing mitochondrial membrane potential.
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Wen Y, Huang H, Huang H, Wu M, Shen K, Pan L. The safety of postoperative hormone replacement therapy in epithelial ovarian cancer patients in China. Climacteric 2013; 16:673-81. [PMID: 23710587 DOI: 10.3109/13697137.2013.806472] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVE This study sought to determine whether postoperative hormone replacement therapy (HRT) has a negative influence on the progression-free and overall survival of epithelial ovarian carcinoma patients. METHODS A retrospective chart review identified 77 patients with invasive epithelial ovarian cancer who had received HRT after primary surgical treatment from January 1995 to December 2010 at Peking Union Medical College Hospital. A 1 : 1 cohort of patients with the same diagnosis who did not receive HRT were matched by age and stage. An analysis of both progression-free survival and overall survival was performed using Cox proportional hazards models. RESULTS According to the univariate analysis, HRT did not significantly influence progression-free or overall survival. Similarly, different types of HRT (estrogen alone, tibolone alone or an estrogen-tibolone combination) had no significant effect on the prognosis of epithelial ovarian cancer patients. The FIGO stage, differentiation, histological type and resection status were significantly correlated with progression-free survival and, except for histological type, these factors also significantly influenced overall survival. Finally, the multivariate analysis demonstrated that the strongest independent variable in predicting both progression-free survival and overall survival was the FIGO stage of the disease. CONCLUSION This study supports the hypothesis that postoperative HRT does not have a negative effect on the progression-free and overall survival of epithelial ovarian cancer patients. However, a multicenter study is needed to support and extend our findings.
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Li Y, Wang W, Wang JP, Pan L, Zhang Y, Yu HT, Jiang W, Wang PZ, Bai XF. Elevated vascular endothelial growth factor levels induce hyperpermeability of endothelial cells in hantavirus infection. J Int Med Res 2013. [PMID: 23206462 DOI: 10.1177/030006051204000519] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
OBJECTIVE To investigate the role of vascular endothelial growth factor (VEGF) in haemorrhagic fever with renal syndrome (HFRS). METHODS VEGF, soluble VEGF receptor (sVEGFR)-2, angiopoietin (Ang)-1, tumour necrosis factor (TNF)-α and interferon (IFN)-γ levels were measured in serum samples from 68 patients with HFRS. Cultured human umbilical vein endothelial cells (HUEVCs) were infected by Hantaan virus (HTNV) and/or stimulated with recombinant VEGF; dextran permeability of the cells was determined. Claudin-1 and vascular endothelial (VE)-cadherin levels were determined by real-time reverse transcription-polymerase chain reaction and Western blot analyses. RESULTS Serum VEGF, TNF-α and IFN-γ levels were significantly elevated, whereas sVEGFR2 and Ang-1 levels were reduced, during the acute phase of HFRS. In vitro cell permeability was unaffected by HTNV infection or VEGF stimulation alone, but the combination of HTNV infection and VEGF treatment significantly increased the permeability of endothelial cell monolayers in a time-dependent manner. Claudin-1 and VE-cadherin were downregulated at both the mRNA and protein level by combined HTNV infection and VEGF stimulation. CONCLUSIONS Elevated VEGF induced by HTNV infection may play an important role in the vascular hyperpermeability that is characteristic of HFRS.
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Zhao D, Pan L, Zhang F, Pan F, Ma J, Zhang X, Liu Y. Successful use of aromatase inhibitor letrozole in NOA with an elevated FSH level: a case report. Andrologia 2013; 46:456-7. [PMID: 23803162 DOI: 10.1111/and.12122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/19/2013] [Indexed: 11/30/2022] Open
Abstract
Aromatase inhibitors inhibit the conversion of testosterone to oestrogens and could reduce serum oestradiol concentrations. Letrozole is one of aromatase inhibitors frequently used in treatment of men with oligospermia. We present the case of an infertile man with small testes and an elevated FSH level, which was diagnosed as NOA, hypospermatogenesis proven by testicular biopsy. After taking letrozole for 3 months, semen analyses by computer-aided sperm analysis present that this man had normal spermatogenesis. This is the first case report of the activation of spermatogenesis, in man who was NOA with elevated FSH level, resulting from the use of the one of aromatase inhibitors.
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Pan L, Morozov A, Wagner C, Arratia PE. Nonlinear elastic instability in channel flows at low Reynolds numbers. PHYSICAL REVIEW LETTERS 2013; 110:174502. [PMID: 23679736 DOI: 10.1103/physrevlett.110.174502] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/20/2012] [Indexed: 06/02/2023]
Abstract
It is presently believed that flows of viscoelastic polymer solutions in geometries such as a straight pipe or channel are linearly stable. Here we present experimental evidence that such flows can be nonlinearly unstable and can exhibit a subcritical bifurcation. Velocimetry measurements are performed in a long, straight microchannel; flow disturbances are introduced at the entrance of the channel system by placing a variable number of obstacles. Above a critical flow rate and a critical size of the perturbation, a sudden onset of large velocity fluctuations indicates the presence of a nonlinear subcritical instability. Together with the previous observations of hydrodynamic instabilities in curved geometries, our results suggest that any flow of polymer solutions becomes unstable at sufficiently high flow rates.
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Wang Y, Pan L, Fan W, Zhou Z, Zhu L, Wang Y, Hu R. Influence of vagal injury on acute traumatic reaction after blast injury. Eur J Trauma Emerg Surg 2013; 39:385-92. [PMID: 26815399 DOI: 10.1007/s00068-013-0277-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Accepted: 03/12/2013] [Indexed: 10/27/2022]
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Man X, Zhang X, Tang J, Chen Y, Li H, Xu B, Pan L. Downregulation of 14-3-3β and 14-3-3ζ in lesions of psoriasis vulgaris. Clin Exp Dermatol 2013; 38:390-5. [PMID: 23517412 DOI: 10.1111/ced.12014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/24/2012] [Indexed: 11/26/2022]
Abstract
BACKGROUND The 14-3-3 proteins are a family of conserved regulatory molecules expressed in all eukaryotic cells, which play essential roles in a wide range of vital regulatory processes, including differentiation, proliferation and transformation. In mammalian cells, seven 14-3-3 isoforms (β, γ, ε, η, θ/τ, σ and ζ) have been identified, and each of these seems to have distinct tissue localizations and isoform-specific functions. 14-3-3β and 14-3-3ζ are two important members of the 14-3-3 family. AIM To explore the role of 14-3-3β and 14-3-3ζ in normal skin and psoriasis vulgaris (PV) skin. METHODS Using immunohistochemistry and western blotting, we measured expression of 14-3-3β and 14-3-3ζ in 30 PV lesions and 15 normal skin samples. The average optical density (OD) of immunostaining and the relative grey scale of immunoblotting for 4-3-3β and 14-3-3ζ were analysed by the t-test. RESULTS The average OD of immunostaining for 14-3-3β and 14-3-3ζ was 0.17 ± 0.00 and 0.24 ± 0.01, respectively, in psoriatic lesions, which was significantly lower than in normal controls (0.22 ± 0.01 and 0.37 ± 0.02, respectively; P < 0.01 for both). There was also a significant difference in the relative grey scale of 14-3-3β and 14-3-3ζ (0.52 ± 0.03 and 1.44 ± 0.06, respectively) in psoriatic lesions compared with normal control tissue (3.32 ± 0.15 and 2.76 ± 0.11, respectively; P < 0.01 for both). CONCLUSIONS Expression of 14-3-3β and 14-3-3ζ were lower in psoriatic lesions than in normal human skin tissue. We speculate that 14-3-3β and 14-3-3ζ may be involved in the regulation of normal skin function, thus decreased expression of 14-3-3β and 14-3-3ζ might precipitate the disturbance in proliferation and differentiation of keratinocytes seen in psoriasis.
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Yan JH, Gu WJ, Pan L. Lack of evidence on Tai Chi-related effects in patients with type 2 diabetes mellitus: a meta-analysis. Exp Clin Endocrinol Diabetes 2013; 121:266-71. [PMID: 23450333 DOI: 10.1055/s-0033-1334932] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
AIMS Whether Tai Chi (TC) benefits patients with type 2 diabetes mellitus (T2DM) remains controversial. Thus, we performed a meta-analysis to assess the efficacy of TC in T2DM patients. METHODS A computerised search through PubMed and Embase was performed to identify relevant studies. The primary outcomes were fasting blood glucose (FBG), haemoglobin A1c (HbA1c) and insulin resistance (HOMA). Secondary outcomes included total cholesterol, high-density lipoprotein cholesterol (HDL-C) and triglyceride. Weighted mean differences (WMDs) and 95% confidence intervals (CIs) were calculated. RESULTS 4 randomised controlled trials (RCTs) and 5 non-randomised controlled trials (NRCTs) met the inclusion criteria. The pooled WMDs from RCTs were -14.82 mg/dL (95% CI: -49.17 to 19.53; P=0.40) for FBG, -0.19% (95% CI: -0.41 to 0.03; P=0.09) for HbA1c and -0.34 units (95% CI: -3.02 to 2.34; P=0.80) for HOMA. The WMDs from NRCTs were -11.22 mg/dL (95% CI: -18.58 to -3.86; P=0.003) for FBG, -0.41% (95% CI: -0.53 to -0.29; P<0.00001) for HbA1c and -0.60 units (95% CI: -1.46 to 0.25; P=0.16) for HOMA. Furthermore, the pooled results of serum lipids suggest that TC significantly reduced triglyceride (P=0.006) instead of total cholesterol (P=0.77), and failed to improve HDL-C (P=0.12). CONCLUSIONS Sufficient evidence to support the benefits of TC to T2DM patients is lacking. Further large-scale studies are needed to investigate the long-term efficacy of TC.
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Brust M, Schaefer C, Doerr R, Pan L, Garcia M, Arratia PE, Wagner C. Rheology of human blood plasma: viscoelastic versus Newtonian behavior. PHYSICAL REVIEW LETTERS 2013; 110:078305. [PMID: 25166417 DOI: 10.1103/physrevlett.110.078305] [Citation(s) in RCA: 128] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 12/05/2012] [Indexed: 05/13/2023]
Abstract
We investigate the rheological characteristics of human blood plasma in shear and elongational flows. While we can confirm a Newtonian behavior in shear flow within experimental resolution, we find a viscoelastic behavior of blood plasma in the pure extensional flow of a capillary breakup rheometer. The influence of the viscoelasticity of blood plasma on capillary blood flow is tested in a microfluidic device with a contraction-expansion geometry. Differential pressure measurements revealed that the plasma has a pronounced flow resistance compared to that of pure water. Supplementary measurements indicate that the viscoelasticity of the plasma might even lead to viscoelastic instabilities under certain conditions. Our findings show that the viscoelastic properties of plasma should not be ignored in future studies on blood flow.
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Pan L, Krim J. Scanning tunneling microscope-quartz crystal microbalance study of temperature gradients at an asperity contact. THE REVIEW OF SCIENTIFIC INSTRUMENTS 2013; 84:014901. [PMID: 23387679 DOI: 10.1063/1.4767239] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Investigations of atomic-scale friction frequently involve setups where a tip and substrate are initially at different temperatures. The temperature of the sliding interface upon contact has thus become a topic of interest. A method for detecting initial tip-sample temperature differences at an asperity contact is described, which consists of a scanning tunneling microscope (STM) tip in contact with the surface electrode of a quartz crystal microbalance (QCM). The technique makes use of the fact that a QCM is extremely sensitive to abrupt changes in temperature. In order to demonstrate the technique's capabilities, QCM frequency shifts were recorded for varying initial tip-substrate temperature differences as an STM tip was brought into and out of contact. The results are interpreted within the context of a recent model for thermal heat conduction at an asperity contact, and it is concluded that the transient frequency response is attributable to small changes in temperature close to the region of contact rather than a change in the overall temperature of the QCM itself. For the assumed model parameters, the results moreover reveal substantial temperature discontinuities at the boundary between the tip and the sample, for example, on the order of 10-15 °C for initial temperature differences of 20 °C.
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Zhang Q, Qian Z, Pan L, Li H, Zhu H. Hypoxia-inducible factor 1 mediates the anti-apoptosis of berberine in neurons during hypoxia/ischemia. ACTA ACUST UNITED AC 2012; 99:311-23. [DOI: 10.1556/aphysiol.99.2012.3.8] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Wang Y, Wu J, Zheng Y, Huang L, Pan L. The affective states influence understanding other's emotion in the eyes: An ERP analysis. Int J Psychophysiol 2012. [DOI: 10.1016/j.ijpsycho.2012.07.162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Chen F, Pan L, Chao W, Dai Y, Yu W. Character of chicken polymorphic major histocompatibility complex class II alleles of 3 Chinese local breeds. Poult Sci 2012; 91:1097-104. [PMID: 22499866 DOI: 10.3382/ps.2011-02007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
To better understand the major histocompatibility complex (MHC) genetic character of domestic birds, we sequenced and analyzed chicken MHC II (B-L) genes of 3 local chicken breeds, derived from 3 separate areas in China. We amplified cDNA sequences from 105 individuals, accounting for 35 alleles. Some of the same B-LB alleles with a high frequency were found in all samples. The putative B-L α-chain had few polymorphic sites, whereas the B-L β-chain had several polymorphic sites. Most of the mutation positions were located in the B-LB β1 domain encoded by exon 2, especially in the peptide-binding region. This indicated that the highly polymorphic peptide-binding region could potentiate binding diverse antigen epitopes. The comparison of 3-D molecule structures of chicken B-L and human HLA-DR1 revealed a distinctly structural similarity, but the chicken B-L molecule had more polymorphic sites than the human HLA-DR1 molecule, which presumably might be a mechanism to compensate for responding to a wider array of pathogens due to fewer loci for chicken. Moreover, some conserved sites in human and chicken MHC class II molecules reflected their common ancestry and similar functions. These results suggest that the chicken B-L gene showed more polymorphic sites and distinctly dominant trans-breed alleles, potentially to adapt to pathogens.
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Hewamadduma C, Grierson A, Moens C, Pan L, Ma T, Ingham P, Ramesh T, Shaw P. A novel alternative splicing event rescues the mutant tardbp phenotype in a zebrafish model of TDP-43 related Amyotrophic Lateral Sclerosis (ALS) (IN9-2.001). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.in9-2.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Hewamadduma C, Grierson A, Moens C, Pan L, Ma T, Ingham P, Ramesh T, Shaw P. A novel alternative splicing event rescues the mutant tardbp phenotype in a zebrafish model of TDP-43 related Amyotrophic Lateral Sclerosis (ALS) (P03.180). Neurology 2012. [DOI: 10.1212/wnl.78.1_meetingabstracts.p03.180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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169
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Liu Y, Pan L, Zhang ZN, Shi ZH, Wang Y, Jing ZC, Lee WY, Chan MC, Cheun TK, So KH, Yu CM, Lee WY, Pang TY, Kong WY, Chan KH, Kwok LM, Chan SW, Ko SSW, Tam CWY, Fok BSP, Hu M, Yin OQP, Chow MSS, Tomlinson B, Guo ZR, Wu M, Zhang LJ, Luo WS, Liu JC, Ding Y, Zhu QR, Chen Q, Chan SSW, Ahmad I, Graham CA, Rainer TH, Berdina ON, Madaeva IM, Dolgikh VV, Xie MX, Li YM, Gao X, Wang GY, Wang AL, Xu T, Tong WJ, Zhang YH, Pogodina AV, Dolgikh VV, Moretzkaya IS, Nawaz SK, Xu JB, Zhang YL, Liu Y, Huang G, Zhang TJ, Huang XB, Ou YLY, Chan SSW, Tse MM, Chan CPY, Graham CA, Rainer TH, Wong MCS, Yan B, Tam WWS, Wang HHX, Liu KSD, Liu KQ, Cheung CSK, Tong ELH, Sek ACH, John GK, Cheung NT, Yu CM, Leeder S, Griffiths S, Wang HHX, Wong MCS, Yan B, Tang JL, Wang JJ, Yu CM, Griffiths S, Wong MCS, Yan B, Tam WWS, Wang HHX, Liu KSD, Liu KQ, Cheung CSK, Tong ELH, Sek ACH, Cheung NT, Yu CM, Leeder S, Griffiths S, Shin SH, Woo SI, Kim DH, Park KS, Kwan J, Liu KQL, Wong MCS, Wang HHX, Liu KSD, Yan B, Yu CM, Griffiths S, Borumand H, Cheang IN, Law TC, Choi SKV, Chung LH, Chan SLD, Li YC, Choy PS, Hung YKS, Cheung YHK, Chan LH, Chan KHK. P077 * Evaluation of two-dimensional strain echocardiography in quantifying right ventricular function in patients with pulmonary hypertension. Eur Heart J Suppl 2012. [DOI: 10.1093/eurheartj/sur028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Lv HY, Liu HJ, Tan XJ, Pan L, Wen YW, Shi J, Tang XF. The properties of BiSb nanoribbons from first-principles calculations. NANOSCALE 2012; 4:511-517. [PMID: 22101571 DOI: 10.1039/c1nr11585e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The structural, electronic and magnetic properties of BiSb nanoribbons (BSNRs) with different widths and edge configurations are investigated via the first-principles pseudopotential method. It is found that the pristine BSNRs with armchair edges (ABSNRs) are semiconductors and the band gaps exhibit a width dependent odd-even oscillation. In contrast, the pristine BSNRs with zigzag edges (ZBSNRs) are found to be metallic. When all the edge atoms are passivated by hydrogen, both the ABSNRs and ZBSNRs become semiconducting and the corresponding band gaps decrease monotonically with the increasing width. If, however, the edge atoms are partially passivated, the ABSNRs can be either semiconducting or metallic. Moreover, local magnetism appears when all the edge Sb atoms are passivated and there are one or more unsaturated Bi atoms. Using the nonequilibrium Green's function (NEGF) approach, we find that all the investigated odd-numbered ABSNRs have almost the same peak value of the power factor around the Fermi level. This is not the case for the even-numbered ABSNRs, where the peaks are twice that of when they are n-type doped. Our calculations indicate that BSNRs can have a very high room temperature figure of merit (ZT value), which makes them very promising candidates for thermoelectric applications.
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Pan L, Liu HJ, Tan XJ, Lv HY, Shi J, Tang XF, Zheng G. Thermoelectric properties of armchair and zigzag silicene nanoribbons. Phys Chem Chem Phys 2012; 14:13588-93. [DOI: 10.1039/c2cp42645e] [Citation(s) in RCA: 103] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Neumann M, Breton E, Cuvillon L, Pan L, Lorenz CH, de Mathelin M. Evaluation of an image-based tracking workflow using a passive marker and resonant micro-coil fiducials for automatic image plane alignment in interventional MRI. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2012; 2012:1085-1088. [PMID: 23366084 DOI: 10.1109/embc.2012.6346123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
In this paper, an original workflow is presented for MR image plane alignment based on tracking in real-time MR images. A test device consisting of two resonant micro-coils and a passive marker is proposed for detection using image-based algorithms. Micro-coils allow for automated initialization of the object detection in dedicated low flip angle projection images; then the passive marker is tracked in clinical real-time MR images, with alternation between two oblique orthogonal image planes along the test device axis; in case the passive marker is lost in real-time images, the workflow is reinitialized. The proposed workflow was designed to minimize dedicated acquisition time to a single dedicated acquisition in the ideal case (no reinitialization required). First experiments have shown promising results for test-device tracking precision, with a mean position error of 0.79 mm and a mean orientation error of 0.24°.
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Pan L, Jia MY, Xue P, Wang KJ, Jin ZM. Studies on positive conveying in helically channeled single screw extruders. EXPRESS POLYM LETT 2012. [DOI: 10.3144/expresspolymlett.2012.58] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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You L, Sheng ZY, Chen JY, Pan L, Chen L. The safety and efficacy of early-stage bi-weekly alendronate to improve bone mineral density and bone turnover in chinese post-menopausal women at risk of osteoporosis. J Int Med Res 2011; 39:302-10. [PMID: 21672334 DOI: 10.1177/147323001103900133] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
The efficacy and safety of early, low frequency antiresorptive drug intervention for osteopaenia on bone mineral density (BMD) and bone turnover in Chinese post-menopausal women at risk of developing osteoporosis were investigated. A total of 180 women aged 40 - 70 years were enrolled and equally randomized to receive either 70 mg alendronate once every 2 weeks plus 0.5 μg alfacalcidol daily (treatment group) or alfacalcidol 0.5 μg daily alone (control group) for 12 months. In the treatment group, lumbar spine and total hip BMD at 12 months had increased significantly from baseline and compared with the control group. There were also significant reductions in serum levels of the bone turnover biomarkers, bone-specific alkaline phosphatase and C-terminal telopeptide of type I collagen, compared with the control. No serious adverse events were observed in either group and safety profiles were similar. It was concluded that early intervention with 70 mg alendronate once every 2 weeks was safe, well tolerated and more effective than alfacalcidol alone (control) in increasing BMD and reducing bone turnover, and might prevent serious outcomes, such as fragility fractures, reduce rates of adverse effects and improve patient compliance.
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175
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Han L, Shen X, Pan L, Lin S, Liu X, Lin L, Pu X. Changes of myeloperoxidase (MPO) and ischaemia modified albumin in patients with coronary heart disease. BRITISH HEART JOURNAL 2011. [DOI: 10.1136/heartjnl-2011-300867.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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