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• Study assessed four adverse events following 2022–2023 seasonal influenza vaccines. • Study population was 12.7 million Medicare enrollees 65 years and older. • There was no increase in post-vaccination incidence rates for three adverse events. • Anaphylaxis rates were elevated and possibly modified by concomitant vaccination. While safety of influenza vaccines is well-established, some studies have suggested potential associations between influenza vaccines and certain adverse events (AEs). This study examined the safety of the 2022–2023 influenza vaccines among U.S. adults ≥ 65 years. A self-controlled case series compared incidence rates of anaphylaxis, encephalitis/encephalomyelitis, Guillain-Barré Syndrome (GBS), and transverse myelitis following 2022–2023 seasonal influenza vaccinations (i.e., any, high-dose or adjuvanted) in risk and control intervals among Medicare beneficiaries ≥ 65 years. We used conditional Poisson regression to estimate incidence rate ratios (IRRs) and 95 % confidence intervals (CIs) adjusted for event-dependent observation time and seasonality. Analyses also accounted for uncertainty from outcome misclassification where feasible. For AEs with any statistically significant associations, we stratified results by concomitant vaccination status. Among 12.7 million vaccine recipients, we observed 76 anaphylaxis, 276 encephalitis/encephalomyelitis, 134 GBS and 75 transverse myelitis cases. Only rates of anaphylaxis were elevated in risk compared to control intervals. With all adjustments, an elevated, but non-statistically significant, anaphylaxis rate was observed following any (IRR: 2.40, 95% CI: 0.96–6.03), high-dose (IRR: 2.31, 95% CI: 0.67–7.91), and adjuvanted (IRR: 3.28, 95% CI: 0.71–15.08) influenza vaccination; anaphylaxis IRRs were 2.54 (95% CI: 0.49–13.05) and 1.64 (95% CI: 0.38–7.05) for persons with and without concomitant vaccination, respectively. Rates of encephalitis/encephalomyelitis, GBS, or transverse myelitis were not elevated following 2022–2023 seasonal influenza vaccinations among U.S. adults ≥ 65 years. There was an increased rate of anaphylaxis following influenza vaccination that may have been influenced by concomitant vaccination. [ABSTRACT FROM AUTHOR]

Li metal battery is a promising next-generation power storage devices, but faces the serious safety issues caused by the uncontrolled Li dendrite growth and leakage of the flammable organic electrolyte. Herein, a low-cost CA/PVDF (cellulose acetate/polyvinylidene fluoride) composite membrane is prepared via electrospinning technology for safe lithium metal batteries. This membrane (45 μm) exhibits the high porosity (76.9 %) and excellent thermally stability (>180 °C) preventing the short circuit during abuse. The CA/PVDF-based gel polymer electrolyte (GPE), fabricated with CA/PVDF electrospun membrane swelled by carbonate-based organic liquid electrolyte, delivers the ionic conductivity of 1.82 mS cm−1 and Li + transfer number of 0.506, which achieve uniform Li+ ion electrodeposition and inhibit the formation of lithium dendrites. As the results, the symmetrical cell Li/CA/PVDF-based GPE/Li exhibits the impressive reversible Li stripping/plating behavior over 300 h at 1 mA cm−2 with the capacity of 1 mA h cm−2. Furthermore, the assembled LiFePO 4 /GPE/Li battery exhibits the capacity of 101.2 mA h g−1 at 5C with the capacity retention of 94.6 % after 400 cycles, which exceeds that of traditional liquid electrolytes. This research provides a low-cost gel polymer electrolyte via the electrospinning technique for rechargeable lithium batteries with good electrochemical performance and high security. A low-cost CA/PVDF composite membrane is designed via electrospinning technology for safe lithium metal batteries, which achieves uniform Li+ ion electrodeposition, inhibits formation of lithium dendrites over 300 h and stabilizes the interface between electrode and electrolyte. The assembled LiFePO 4 /CA/PVDF-based GPE/Li battery exhibits the capacity of 101.2 mA h g−1 at 5C with the capacity retention of 94.6 % after 400 cycles. [Display omitted] • A low-cost CA/PVDF composite membrane is prepared via electrospinning technology. • The CA/PVDF-based gel polymer electrolyte delivers the ionic conductivity of 1.82 mS cm−1 and Li + transfer number of 0.506, which achieve uniform Li+ ion electrodeposition. • The assembled Li symmetrical cell exhibits the impressive reversible cycle over 300 h. • LiFePO 4 /GPE/Li battery exhibits the capacity of 101.2 mA h g−1 at 5C with the capacity retention of 94.6 % after 400 cycles. [ABSTRACT FROM AUTHOR]

This paper aims to study the Galerkin finite element method (FEM) of both the semi-discrete and the fully-discrete schemes with linear triangular element for the time-dependent Joule heating problem. Through some new estimating approaches such as the different mathematical induction assumption, the mean-value technique and the special characters of this element, the superclose and superconvergence estimates for the related variables in the H 1 -norm are derived under lower regularities of the solutions of the considered problem rigorously, which simply the proof process and improve the corresponding results in the existing literature. Finally, numerical results are provided to confirm the theoretical analysis. [ABSTRACT FROM AUTHOR]

In this paper, the discontinuous Galerkin method (DGM) of nonconforming Wilson element is studied for the semi-linear parabolic problem. The global superconvergence with respect to the mesh size are derived in the modified H 1 -norm for the semi-discrete scheme and two fully discrete schemes, in which the usual extrapolation and interpolation post-processing approaches are not involved, and the error estimates are one order higher than that of the traditional Galerkin finite element method (FEM). Therefore, the corresponding results in the existing literature are improved. Finally, some numerical results are provided to confirm the theoretical analysis. [ABSTRACT FROM AUTHOR]

Tissue engineered vascular grafts (TEVGs) represent a promising therapeutic option for emergency vascular intervention. Although the application of small-diameter TEVGs using patient-specific primary endothelial cells (ECs) to prevent thrombosis and occlusion prior to implantation could be hindered by the long time course required for in vitro endothelialization, human induced pluripotent stem cells (hiPSCs) provide a robust source to derive immunocompatible ECs (hiPSC-ECs) for immediate TEVG endothelialization. To achieve clinical application, hiPSC-ECs should be derived under culture conditions without the use of animal-derived reagents (xenogeneic-free conditions), to avoid unwanted host immune responses from xenogeneic reagents. However, a completely xenogeneic-free method of hiPSC-EC generation has not previously been established. Herein, we substituted animal-derived reagents used in a standard method of xenogeneic hiPSC-EC differentiation with functional counterparts of human origin. As a result, we generated xenogeneic-free hiPSC-ECs (XF-hiPSC-ECs) with similar marker expression and function to those of human primary ECs. Furthermore, XF-hiPSC-ECs functionally responded to shear stress with typical cell alignment and gene expression. Finally, we successfully endothelialized decellularized human vessels with XF-hiPSC-ECs in a dynamic bioreactor system. In conclusion, we developed xenogeneic-free conditions for generating functional hiPSC-ECs suitable for vascular tissue engineering, which will further move TEVG therapy toward clinical application. Image, graphical abstract [ABSTRACT FROM AUTHOR]

Development of mechanically advanced tissue-engineered vascular grafts (TEVGs) from human induced pluripotent stem cell (hiPSC)-derived vascular smooth muscle cells (hiPSC-VSMCs) offers an innovative approach to replace or bypass diseased blood vessels. To move current hiPSC-TEVGs toward clinical application, it is essential to obtain hiPSC-VSMC-derived tissues under xenogeneic-free conditions, meaning without the use of any animal-derived reagents. Many approaches in VSMC differentiation of hiPSCs have been reported, although a xenogeneic-free method for generating hiPSC-VSMCs suitable for vascular tissue engineering has yet to be established. Based on our previously established standard method of xenogeneic VSMC differentiation, we have replaced all animal-derived reagents with functional counterparts of human origin and successfully derived functional xenogeneic-free hiPSC-VSMCs (XF-hiPSC-VSMCs). Next, our group developed tissue rings via cellular self-assembly from XF-hiPSC-VSMCs, which exhibited comparable mechanical strength to those developed from xenogeneic hiPSC-VSMCs. Moreover, by seeding XF-hiPSC-VSMCs onto biodegradable polyglycolic acid (PGA) scaffolds, we generated engineered vascular tissues presenting effective collagen deposition which were suitable for implantation into an immunodeficient mice model. In conclusion, our xenogeneic-free conditions for generating hiPSC-VSMCs produce cells with the comparable capacity for vascular tissue engineering as standard xenogeneic protocols, thereby moving the hiPSC-TEVG technology one step closer to safe and efficacious clinical translation. Image, graphical abstract [ABSTRACT FROM AUTHOR]

Abstract An H 1 -Galerkin mixed finite element method (MFEM) is developed for the Benjamin–Bona–Mahony (BBM) equation with the bilinear element and zero order Raviart–Thomas element pair (Q 11 ∕ Q 10 × Q 01). Then based on the special interpolation properties of the above two elements and the mean-value technique, the supercloseness and superconvergence results of order O (h 2) for the semi-discrete scheme and of order O (h 2 + (Δ t) 2) for the Crank–Nicolson fully-discrete scheme are deduced for the original variable u in H 1 -norm and the flux p → in H (d i v , Ω) -norm, respectively. Finally, a numerical example is carried out to demonstrate the theoretical analysis. [ABSTRACT FROM AUTHOR]

This paper proposed a pitching wave energy converter with adjustable natural period (called C-WEC), which is achieved by moving the movable mass block. A prototype was fabricated and tested in a wave flume to study the performance of the C-WEC. Free decay tests demonstrated that the natural period of the prototype can be adjusted between 1.60 s and 3.30 s. The wave flume tests showed that for regular and irregular waves, the prototype can capture high mechanical power and exhibit large response amplitude operator (RAO) as well as high capture width ratio (CWR) across a wide range of wave periods, avoiding poor performance in non-resonant states. The Froude scaling law was used to assess the annual average power of a 1:16th full-scale C-WEC in real seas off the Canary Islands based on the measured mechanical power in irregular waves. The result showed that the annual average power of the C-WEC using tuning control can be up to 29.8 kW, an increase of 67.4% compared to the WEC with a constant natural period. The experimental results showed that the C-WEC is a promising pitching wave energy converter and its natural period adjustment method can be easily applied to other pitching WECs. • A pitching WEC with adjustable natural period (called C-WEC) was proposed. • A C-WEC prototype was fabricated and tested in a wave flume. • Prototype's natural period can be adjusted between 1.6 s and 3.30 s. • Prototype can capture high mechanical power across a wide range of wave periods. • Froude scaling law was used to assess the full-scale C-WEC's annual average power. [ABSTRACT FROM AUTHOR]

Mn 2 NiGa 1-x Cr x (x = 0–0.5) alloys were synthesized successfully to explore possible Cr-based all- d -metal Heusler alloys with magnetic shape memory effects. When x = 0–0.25, Mn 2 NiGa 1-x Cr x are single BCC Heusler phase, but when x = 0.375 some FCC phase co-exists with the main Heusler phase, finally a pure FCC phase is formed in Mn 2 NiGa 0.5 Cr 0.5. In BCC Mn 2 NiGa 1-x Cr x , Cr-doping leads to the decrease of martensitic transformation temperature T M and increase of the saturation magnetization M s at 5 K. While the FCC phase does not show the trace of phase transition and has a very low magnetization till 5 K. First-principles calculations suggest that, in BCC Mn 2 NiGa 1-x Cr x the partial spin moment of Cr is large and parallel to that of Mn (B), which leads to the increase of M s when x = 0–0.25. A higher stability of the martensite than the austenite is found, which supports the phase transition observed experimentally. It may be noticed that the T M of Mn 2 NiGa 1-x Cr x decreases with both increasing e/a and decreasing cell volume, which is opposite to the empirical rule in traditional Heusler alloys. Calculation suggests that Cr–Ga disorder may be a possible reason for this decrease. • Heusler alloys Mn 2 NiGa 1-x Cr x were synthesized successfully. • Effect of Cr-doping on phase transition and magnetism of Mn 2 NiGa was studied. • Unlike traditional Heusler alloys, T M of Mn 2 NiGa 1-x Cr x decreases with increasing e/a and decreasing cell volume. • A new Mn 2 Ni(Ga, Cr) FCC phase was reported. [ABSTRACT FROM AUTHOR]

A Galerkin finite element method (FEM) is developed for nonlinear Poisson–Nernst–Planck (PNP) equations. Based on the combination technique of the element's interpolation and Ritz projection together with the special mean value approach, the superclose and superconvergence estimates with order O (h 2) are derived under weaker regularity requirements of the exact solution. Some numerical results are provided to confirm the theoretical analysis. [ABSTRACT FROM AUTHOR]

A new low order two-grid mixed finite element method (FEM) is developed for the nonlinear Benjamin-Bona-Mahoney (BBM) equation, in which the famous nonconforming rectangular C N Q 1 r o t element and Q 0 × Q 0 constant element are used to approximate the exact solution u and the variable p → = ∇ u t , respectively. Then, based on the special properties of these two elements and interpolation post-processing technique, the superconvergence results for u in broken H 1-norm and p → in L 2-norm are obtained for the semi-discrete and Crank-Nicolson fully-discrete schemes without the restriction between the time step τ and coarse mesh size H or the fine mesh size h , which improve the results of the existing literature. Finally, some numerical results are provided to confirm the theoretical analysis. [ABSTRACT FROM AUTHOR]

• Annual TTS IRs were similar between Jan-Dec 2019 and Jan-Oct 2020. • Common site TTS IRs increased with age and were higher among males. • Unusual site TTS IRs were higher in males than females. • Unusual site TTS IRs increased with age for adults aged 18–64 years. • For adults aged ≥ 65 years, unusual site TTS IRs decreased with age. Increased risk of thrombosis with thrombocytopenia syndrome (TTS) following adenovirus vector-based COVID-19 vaccinations has been identified in passive surveillance systems. TTS incidence rates (IRs) in the United States (U.S.) are needed to contextualize reports following COVID-19 vaccination. We estimated annual and monthly IRs of overall TTS, common site TTS, and unusual site TTS for adults aged 18–64 years in Carelon Research and MarketScan commercial claims (2017–Oct 2020), CVS Health and Optum commercial claims (2019–Oct 2020), and adults aged ≥ 65 years using CMS Medicare claims (2019–Oct 2020); IRs were stratified by age, sex, and race/ethnicity (CMS Medicare). Across data sources, annual IRs for overall TTS were similar between Jan-Dec 2019 and Jan-Oct 2020. Rates were higher in Medicare (IRs: 370.72 and 365.63 per 100,000 person-years for 2019 and 2020, respectively) than commercial data sources (MarketScan IRs: 24.21 and 24.06 per 100,000 person-years; Optum IRs: 32.60 and 31.29 per 100,000 person-years; Carelon Research IRs: 24.46 and 26.16 per 100,000 person-years; CVS Health IRs: 30.31 and 30.25 per 100,000 person-years). Across years and databases, common site TTS IRs increased with age and were higher among males. Among adults aged ≥ 65 years, the common site TTS IR was highest among non-Hispanic black adults. Annual unusual site TTS IRs ranged between 2.02 and 3.04 (commercial) and 12.49 (Medicare) per 100,000 person-years for Jan-Dec 2019; IRs ranged between 1.53 and 2.67 (commercial) and 11.57 (Medicare) per 100,000 person-years for Jan-Oct 2020. Unusual site TTS IRs were higher in males and increased with age in commercial data sources; among adults aged ≥ 65 years, IRs decreased with age and were highest among non-Hispanic American Indian/Alaska native adults. TTS IRs were generally similar across years, higher for males, and increased with age. These rates may contribute to surveillance of post-vaccination TTS. [ABSTRACT FROM AUTHOR]

A self-reacting resonant C-shaped wave energy converter (SR-C-WEC) consisting of a pair of resonant sub-C-WECs connected by a rigid frame is proposed, which uses the two sub-C-WECs to provide mutual reaction force to solve the efficiency problem caused by floating WECs being hard to provide enough reaction force on WEC and uses the controllable resonant WEC to solve the efficiency problem caused by the temporal variability of waves. Resonant control and equivalent wave force control models are proposed to maximize the absorbed power. The effect of spacing between two sub-C-WECs, natural period, PTO damping and mooring stiffness to absorbed power is investigated. It is found that SR-C-WEC can achieve resonance at each wave condition and the power generation is maximum when the spacing is equal to half wavelength, which is comparable to the power generation when the frame is fixed. In a real sea condition, when the spacing is adjusted or not, the difference in average annual power is only 8.3%. Therefore, constant spacing can be used to simplify the structure and facilitate the application of SR-C-WEC. It is predicted that SR-C-WEC can reach 3638 effective power generation hours per year in real seas off China. • A self-reacting resonant floating wave energy converter (SR-C-WEC) is proposed. • The relationship between the equivalent wave force and the spacing is revealed. • The efficiency of the device can be increased by using resonance. • The energy absorption characteristics of the SR-C-WEC are less affected by the mooring system. [ABSTRACT FROM AUTHOR]

• Five of six outcomes had no increased risk following COVID-19 monovalent mRNA vaccines (primary series and booster doses). • No consistent risk of pulmonary embolism was observed after exposure to COVID-19 monovalent mRNA vaccines. • Results support the favorable safety profile of COVID-19 mRNA vaccines administered in the U.S. elderly population. Our near-real-time safety monitoring of 16 adverse events (AEs) following COVID-19 mRNA vaccination identified potential elevation in risk for six AEs following primary series and monovalent booster dose administration. The crude association with AEs does not imply causality. Accordingly, we conducted robust evaluation of potential associations. We conducted two self-controlled case series studies of COVID-19 mRNA vaccines (BNT162b2 and mRNA-1273) in U.S. Medicare beneficiaries aged ≥ 65 years. Adjusted incidence rate ratio (IRRs) and 95 % confidence intervals (CIs) were estimated following primary series doses for acute myocardial infarction (AMI), pulmonary embolism (PE), immune thrombocytopenia (ITP), disseminated intravascular coagulation (DIC); and following monovalent booster doses for AMI, PE, ITP, Bell's Palsy (BP) and Myocarditis/Pericarditis (Myo/Peri). The primary series study included 3,360,981 individuals who received 6,388,542 primary series doses; the booster study included 6,156,100 individuals with one monovalent booster dose. The AMI IRR following BNT162b2 primary series and booster was 1.04 (95 % CI: 0.91 to 1.18) and 1.06 (95 % CI: 1.003 to 1.12), respectively; for mRNA-1273 primary series and booster, 1.01 (95 % CI: 0.82 to 1.26) and 1.05 (95 % CI: 0.998 to 1.11), respectively. The hospital inpatient PE IRR following BNT162b2 primary series and booster was 1.19 (95 % CI: 1.03 to 1.38) and 0.86 (95 % CI: 0.78 to 0.95), respectively; for mRNA-1273 primary series and booster, 1.15 (95 % CI: 0.94 to 1.41) and 0.87 (95 % CI: 0.79 to 0.96), respectively. The studies' results do not support that exposure to COVID-19 mRNA vaccines elevate the risk of ITP, DIC, Myo/Peri, and BP. We did not find an increased risk for AMI, ITP, DIC, BP, and Myo/Peri and there was not consistent evidence for PE after exposure to COVID-19 mRNA primary series or monovalent booster vaccines. These results support the favorable safety profile of COVID-19 mRNA vaccines administered in the U.S. elderly population. [ABSTRACT FROM AUTHOR]

• Realized wave force testing and addressed issues of control information and basis. • Effects of resonance, damping, nonlinearity on wave energy conversion were revealed. • The novel WEC system was verified to have weak nonlinear characteristics. • A hydrodynamic parameter testing method applicable to the novel WEC was proposed. • It was confirmed that the novel WEC could actively achieve resonance. Inefficiency and intermittency caused by high variabilities of wave properties are common problems in existing wave energy technology. Resonant wave energy conversion technology can effectively solve these problems. However, the nonlinearity induced by the wave energy converter's radiation and operation inhibits the resonance. After weakening the nonlinearity by hydrodynamic optimization and operation manner design, a novel wave energy converter that can realize resonance was proposed. In this paper, it is verified that this wave energy conversion system is close to linear, even in the case of large amplitude oscillation. For the novel wave energy converter, a radiation hydrodynamic parameter testing method is proposed, which provides parameters to accurately control the wave energy conversion system to achieve resonance; a wave force testing method is proposed, which can provide in-situ wave information to control resonance and judge resonance state; the effects of resonance, damping and nonlinearity on wave energy conversion are revealed, which provides a theoretical basis for the design of wave energy converter. Experimental studies showed that the laws of wave energy conversion are basically the same in regular and irregular waves, the methods and laws investigated in the regular waves also apply to irregular waves. And experiments also showed that the novel wave energy conversion system could be controlled to achieve resonance truly, and the novel wave energy converter can achieve resonance and highly efficient wave energy conversion in different wave conditions. The novel wave energy converter can self-perceive the wave changes and actively control its natural period to achieve resonance with incident waves, thus significantly increasing the wave energy conversion efficiency and improving intermittency. [ABSTRACT FROM AUTHOR]

A wave energy converter (WEC) must be controlled to adapt to changing wave conditions to improve its conversion efficiency. Radiation hydrodynamic parameters are essential for the resonance control of the WEC. Although existing numerical simulation and flume test methods can provide these parameters, the results obtained are often significantly different from the actual situation and do not meet the requirements for WEC control. To address this problem, an in-situ testing method for radiation hydrodynamic parameters is proposed. By this method, the analytical expression of WEC's radiation hydrodynamic parameters concerning frequency can be obtained based on a single free decay response curve. Additionally, methods for eliminating the effects of wave disturbances and mechanical friction are also presented in this paper. Based on a resonant device C-WEC, the proposed methods have been verified by numerical simulations and flume tests, providing a fundamental technology for controlling WEC to achieve resonance. • In-situ testing method of wave energy converter's radiation parameter is proposed. • A mechanical friction effect correction method is proposed. • A wave disturbance weakening method is proposed. • The proposed method is verified by numerical simulations and experimental tests. [ABSTRACT FROM AUTHOR]

In Hevea brasiliensis , the laticifers, a green factory of natural rubber, are specialised vessels in which rubber biosynthesis is the main metabolism, and fresh rubber occupies 35–45% volume of latex (the cytoplasm of laticifers). Intriguingly, Latex can be reproduced, drawing on three essential components (i.e., ATP, Acetyl-CoA and NADPH) from glycolysis in laticifers during tapping (a simple collection method). Some related key genes of sucrose loading and cleavage have been identified, such as HbSUT3/HbSUT1a , HbNIN2 , and surely more genes in TCA cycle will be exploited. Besides the aerobic respiration, the anaerobic fermentation is found highly active in laticifers, however, the role of anaerobic metabolism in laticifers remains unclear. In view of the essential role of anaerobic respiration in helping plant survive adverse conditions by supplementing ATP and intermediate metabolites, we hypothesised that it would be involved in rubber biosynthesis in similar way. To assess the role of anaerobic metabolism in laticifers, two main fermentation genes, lactate dehydrogenase (LDH) and pyruvate decarboxylase (PDC) were analysed and characterised on their gene transcription, protein expression, enzyme activities, and the corresponding metabolites flux in response to tapping treatments. Our comprehensive results revealed that the available ATP decreased rapidly with tapping, accompanying by the increasement of dry rubber yield. Moreover, HbLDH1 and HbPDC4 were identified as the key genes in anaerobic metabolism of laticifers, and they were activated by tapping，indicated by a 3.4 - fold decrease in lactate content and a 4.6 - fold increase of acetaldehyde. In addition, the levels of both acetate and acetyl-CoA decreased rapidly. These results suggested that anaerobic metabolism is indispensable to laticifers, and furthermore the synergistic regulation between ethanol and lactate fermentation has been predicted to be involved in rubber biosynthesis by providing ATP or possible intermediate material acetate. A schematic diagram of anaerobic fermentation that contributes to rubber synthesis after tapping was hereby established. • Anaerobic fermentation in laticifers is largely involved in rubber synthesis. • HbLDH1 and HbPDC4 are key genes in anaerobic metabolism of the laticifers. • The transition from lactate to ethanol fermentation occurs with tappings. [ABSTRACT FROM AUTHOR]

C-doped Fe 2 MnGaC x (x = 0, 0.05, 0.1 and 0.2) alloys have been synthesized and the influence of carbon on the structure and magnetic properties of Fe 2 MnGa has been investigated. The doping of C can expand the lattice of Fe 2 MnGa, suggesting that it enters the interstitial site of FCC lattice. The ferromagnetic coupling in Fe 2 MnGaC x can be strongly enhanced with increasing C content. The ferromagnetic to antiferromagnetic transition in undoped Fe 2 MnGa is suppressed by C-doping and disappears when x = 0.1 and 0.2. The saturation magnetization M s and Curie temperature T C also increase with C-doping. Large coercivity and exchange bias can be observed in the magnetic hysteresis loops of Fe 2 MnGa, due to the coexistence of FM and AFM states. But in Fe 2 MnGaC 0.2 , both of them disappear and a pure ferromagnetic character is observed. All this suggests that C-doping can be a possible way to adjust the magnetic properties of Fe 2 MnGa and other related alloys. • Fe 2 MnGaC x alloys were synthesized successfully. • Effect of C-doping on structure and magnetism of Fe 2 MnGa was studied. • Ferromagnetic state in Fe 2 MnGa can be strongly enhanced by C-doping. • A possible way to adjust the magnetic structure of Fe 2 MnGa is proposed. [ABSTRACT FROM AUTHOR]