A Mo-doping LiFe1-xMoxPO4/ccathode material was synthesized via carbothermal reduction route, and the effect of the content of Mo on the structure and electrochemical performance of LiFePO4/c was studied. XRD results...
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A Mo-doping LiFe1-xMoxPO4/ccathode material was synthesized via carbothermal reduction route, and the effect of the content of Mo on the structure and electrochemical performance of LiFePO4/c was studied. XRD results revealed doping of Mo did not change the olivine structure of LiFePO4/c, but also formed the Li+ vacancies, which contribute to increase the diffusion rate of Li+. The experimental results further demonstrated that among the Mo-doping samples, the LiFe0.98Mo0.02PO4/c exhibited the best cycle performance and rate performance. After 100 cycles at 0.1 c, its discharge specificcapacity reached 143.2 mAh center dot g(-1), which was about 10 mAh center dot g(-1) higher than that of pure phase LiFePO4/c. The capacity retention rate was 98%. When cycling at a rate of up to 5 c, the discharge specificcapacity of LiFe0.98Mo0.02PO4/ccan still be maintained above 90 mAh center dot g(-1), indicating that Mo doping was an effective method to improve LiFePO4/c electrochemical performance.
作者：
Visentin, Jonathancouzi, LionelTaupin, Jean-LucCHU Bordeaux
Lab Immunol & Immunogenet Hop Pellegrin Pl Amelie Raba Leon F-33076 Bordeaux France Univ Bordeaux
CNRS ImmunoConcEpT Bordeaux France CHU Bordeaux
Hop Pellegrin Serv Nephrol Transplantat Dialyse & Aphereses Pl Amelie Raba Leon Bordeaux France Hop St Louis
Lab Immunol & Histocompatibilite 1 Ave Claude Vellefaux Paris France Univ Paris
INSERM UMR976 Paris France Univ Paris
Inst Rech St Louis Paris France
In solid organ transplantation (SOT), the clinical relevance of donor-specific antibodies (DSA) directed at anti-HLA-A, -B, -DR and -DQ antigens is largely recognized while it is still a matter of debate for DSA direc...
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In solid organ transplantation (SOT), the clinical relevance of donor-specific antibodies (DSA) directed at anti-HLA-A, -B, -DR and -DQ antigens is largely recognized while it is still a matter of debate for DSA directed at HLA-c. In this review, we summarize the peculiarities of HLA-c among class I HLA antigens as well as their immunogenicity, which underlie the clinical relevance of HLA-c locus and anti-HLA-c DSA in SOT. Many factors, both intrinsic and extrinsic to the HLA-c gene and HLA-c protein, explain its lower expression in comparison with HLA-A and -B. This lower expression can explain the apparent lower immunogenicity of HLA-c leading to a lower prevalence and strength of anti-HLA-c antibodies. Nevertheless, HLA-c antigens are truly immunogenic and preformed anti-HLA-c DSA are clinically relevant. Indeed, anti-HLA-c DSA are able to bind donor cells and to activate the complement pathway both ex vivo and in vivo. In line with this, numerous clinical studies now show that preformed DSA directed at native HLA-c molecules induce poorer graft outcomes. We then plead for the inclusion of HLA-c in all transplant allocation systems and we propose a strategy to cope with anti-HLA-c DSA in SOT. Beyond SOT, anti-HLA-c antibodies generate a growing interest in the allo-HcT, transfusion and obstetrics fields, while new concepts such as the role of the "missing-self" in solid organ rejection places HLA-c as an inescapable actor in transplant tolerance.
For finite-strain problems of quasi-incompressible materials, with hyperelastic and hyperelasto-plastic behavior, we develop a mixed polynomial-enriched radial-basis function (RBF) interpolation. It is characterized b...
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For finite-strain problems of quasi-incompressible materials, with hyperelastic and hyperelasto-plastic behavior, we develop a mixed polynomial-enriched radial-basis function (RBF) interpolation. It is characterized by decoupling quadrature and polynomials for the deviatoric and volumetric terms of the right cauchy-Green tensor. With an enriched interpolation, first and second derivatives of the deformation gradient are continuous. A finite-element mesh is employed for quadrature purposes with the corresponding distribution of Gauss points. In terms of discretization, linear, quadratic and cubic polynomials are combined and function support is established from the number of pre-assigned nodes. Due to the adoption of a Lagrangian kernel, finite strain elasto-plasticconstitutive developments are based on the Mandel stress. combined with the c technique, these developments are found to be convenient from an implementation perspective, as RBF formulations for finite strain plasticity have been limited in terms of generality and amplitude of deformations in the quasi -incompressibility case. Three benchmark tests are successfully solved, and it was found that a combination of reduced integration with a deviatoriccubic basis and volumetric quadratic basis provides superior results in the quasi-incompressible case. Numerical testing shows very good convergence behavior of the results. Besides absence of locking with selective interpolation, outstanding Newton convergence was observed regardless of strain levels.
Deep vein thrombosis (DVT) is common in patients following gynecological surgery. coagulation factor VIII (FVIII) is an important part of the human coagulation system, and FVIII:c is a component of FVIII with anticoag...
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Deep vein thrombosis (DVT) is common in patients following gynecological surgery. coagulation factor VIII (FVIII) is an important part of the human coagulation system, and FVIII:c is a component of FVIII with anticoagulant activity. 800 patients who underwent gynecological surgery were enrolled. General clinical data were harvested, and pre - and postoperative serum FVIII levels were determined. Lower-extremity ultrasound examination and/or postoperative pulmonary angiography were performed. Related data were analyzed statistically. DVT was the first manifestation of venous thromboembolism in all cases. There were a total of 46 cases, and the incidence of DVT was 5.8%. Progression to pulmonary embolism was confirmed in 16 cases, with an incidence of 2.0%. The independent risk factors for DVT after gynecological surgery were postoperative FVIII:c levels (odds ratio [OR] = 1.01), age (OR = 6.57), and operation time >= 3 hours (OR = 2.90) (P < 0.05). When the FVIII:c level was greater than the 75th centile (>= 150 IU/dL), the risk of DVT was 2.99 times higher than that below the 25th centile (<100 IU/dL) (P < 0.05). When combined with the risk factor of operation time >= 3 hours, the risk increased to 3.17 times (P = 0.10). When combined with age >= 60 years, the risk was significantly increased, reaching 12.0 times (P < 0.05). Serum FVIII:c levels are an independent risk factor for DVT after gynecological surgery. Higher levels increase the risk of DVT after gynecological surgery, and they may have a dose-dependent relationship. A synergistic effect exists in combination with other risk factors, which further increases the risk.
The Imnyakh Formation (1500-1800 m thick), which is developed east of the Mama-Bodaibo Synclinorium (inner zone of the Patom Upland), comprises crystalline limestones (marbles) and carbonate shales (metamorphic marls)...
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The Imnyakh Formation (1500-1800 m thick), which is developed east of the Mama-Bodaibo Synclinorium (inner zone of the Patom Upland), comprises crystalline limestones (marbles) and carbonate shales (metamorphic marls). The carbon and strontium isotope compositions (delta c-13(av) = -9.0 +/- 0.4 parts per thousand, Sr-87 /Sr-86 = 0.70810-0.70845) in these rocks are completely identical to those in unmetamorphosed limestones of the Zhuya Group (outer zone) and the Torgo Formation (adjacent part of the Siberian Platform), which are comparable with the global Ediacaran c isotope anomaly (Shuram-Wonoka event). Metamorphism was not accompanied by the removal of Sr whose content in marbles of the Imnyakh Formation are as high (up to 6290 mu g/g) as in limestones of the Zhuya Group in the deepest parts of the Patom paleobasin. Thus, metamorphism was only manifested in the depletion of rocks with the heavy oxygen isotope by 3-4 parts per thousand (delta O-18(av) = 17.2 +/- 1 parts per thousand), relative to unmetamorphosed limestones. carbonates of the pre-Imnyakh black carbonate-bearing shales and deep black crystalline limestones in the Khomolkha and Ugakhan formations are characterized by wide variations of delta c-13 (-4.0 to 7 parts per thousand) and delta O-18 (15.2 to 23.4 parts per thousand), indicating strong postsedimentary alterations. Nevertheless, their Early Vendian (Early Ediacaran) age is confirmed by such features as position in the section, abnormally high delta c-13 values, and the minimum value Sr-87 /Sr-86 = 0.70753 recorded in a sample with the Sr content of 11700 mu g/g. Although the isotope systems of carbonates in the Sogdiondon and Vitim formations (delta c-13 -14.2 to -3.7 parts per thousand, delta O-18 12.2 to 13.4 parts per thousand, and 8(87)Sr/Sr-86 0.71120 to 0.71337) occurring at the Neoproterozoic sequence base in the Zhuya River underwent even stronger modification, it is possible that delta c-13 values in these formations were initially ne
Aerobic denitrification is a feasible and sustainable process for nitrogen removal in environmental protection. The c/N ratio was the vital one that has a significant impact on the performance. However, comprehension ...
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Aerobic denitrification is a feasible and sustainable process for nitrogen removal in environmental protection. The c/N ratio was the vital one that has a significant impact on the performance. However, comprehension of the c/N ratio effect on this bioprocess was not well clarified. In this study, the response of an aerobic denitrifier (Pseudomonas balearica strain RAD-17) to the c/N ratio was investigated from a view of metabolism. It was found that a high total nitrogen (TN) removal efficiency of about 95% was achieved with the dosing c/N ratio of 7.5, while only a slight increase when the dosing c/N ratios were further increased to a high range of 10-30. The carbon validity was out of sync with TN removal and a balance between the two was realizable at a dosing c/N ratio of 7.5 based on the economicconsideration. Moreover, weakened assimilation while enhanced respiration along with the increased c/N ratios was revealed, evidenced by the decreased net intracellular nitrogen and increased nitrogenous gas proportions in nitrogen balance analysis. The growth characteristics in terms of cell number and OD600 showed a division for the high flux of nitrate and organics directed to assimilation and respiration, respectively. The expression levels of carbon and nitrate metabolism-related function genes in P. balearica supported the results above. The c/N ratio of 5.0-7.5 was supposed to be the turning region for the metabolism division between assimilation and respiration in aerobic denitrifying. The results are expected to offer a guideline for the decision made for organics supply for the aerobic denitrification process and support its sustainable application.
This research provides a description and illustrations for a new species from the Phong Nha-Ke Bang National Park, cynanchum quangbinhense. The distribution, habitat, phenology and conservation assessment for the spec...
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This research provides a description and illustrations for a new species from the Phong Nha-Ke Bang National Park, cynanchum quangbinhense. The distribution, habitat, phenology and conservation assessment for the species are also presented. The new species differs from closely related species, c. ovalifolium in many characters such as leaf shape, inflorescence type, fewer and smaller flowers, colour of petals, margins of the corona, and anthers appendages shape, and differs from c. kwangsiense in having small leaves, umbellate inflorescences, triangular sepals, retuse apex of petals, and plicate margin of corona. Our discovery raises the known species of this genus in Vietnam to seven. In addition, a key to species of cynanchum in Vietnam, and notes on morphological variation of c. officinale are presented in this paper.
A facile and effective synthesis of H-2 or D-2 from Pd/ccatalyzed hydrolysis of B(2)pin(2) has first been developed. Among them, B(2)pin(2) is frequently used for borylation reaction, and has rarely been used for hyd...
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A facile and effective synthesis of H-2 or D-2 from Pd/ccatalyzed hydrolysis of B(2)pin(2) has first been developed. Among them, B(2)pin(2) is frequently used for borylation reaction, and has rarely been used for hydrogen evolution. The kinetic isotope effects (KIEs) and tandem reaction for diphenylacetylene and norbornene hydrogenation have confirmed both two H atoms of H-2 gas are provided from H2O. This is contrary to other boron compounds hydrolysis (including NH3BH3, NaBH4), which generates H-2 with only one H atom provided by water and the other one by boron compounds. Note that the hydrolysis of B(2)pin(2) in D2O also provides an easy and useful synthesis of D-2.
The New European Driving cycle (NEDc) induces remarkable degradation of proton exchange membrane fuel cells. The long-term cyclic dynamic potential polarizations based on NEDc with four different Epeak are inves-tigat...
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The New European Driving cycle (NEDc) induces remarkable degradation of proton exchange membrane fuel cells. The long-term cyclic dynamic potential polarizations based on NEDc with four different Epeak are inves-tigated on the multilayer c/cr coated SS316L (c/cr/SS) bipolar plates. c/cr/SS achieves superior small IcRs and low corrosion rate with Epeak up to 1.12 V, demonstrating great potential for commercial applications. However, mild local corrosion occurs at 1.16 V and accelerates at 1.22 V, resulted by the dissolution initiated at the heterogeneous interface. The present work offers new insights into NEDc-based potential polarization induced degradation on c/cr/SS.
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