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Magnesium fertilizer application increases peanut growth and pod yield under reduced nitrogen application in southern China
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作者 Yu Gao Ruier Zeng +6 位作者 Suzhe Yao Ying Wang Jianguo Wang Shubo Wan Wei Hu Tingting Chen Lei Zhang 《The Crop Journal》 SCIE CSCD 2024年第3期915-926,共12页
This study investigated the effect of magnesium application on peanut growth and yield under two nitrogen(N)application rates in acidic soil in southern China.The chlorophyll content,net photosynthetic rate and dry ma... This study investigated the effect of magnesium application on peanut growth and yield under two nitrogen(N)application rates in acidic soil in southern China.The chlorophyll content,net photosynthetic rate and dry matter accumulation of the N-sensitive cultivar decreased under reduced N treatments,whereas no effect was observed on the relevant indicators in the N-insensitive variety GH1026.Mg application increased the net photosynthetic rate by increasing the expression of genes involved in chlorophyll synthesis and Rubisco activity in the leaves during the pegging stage under 50%N treatment,while no effect on the net photosynthetic rate was observed under the 100%N treatment.The rate of dry matter accumulation at the early growth stage,total dry matter accumulation and pod yield at harvest increased after Mg application under 50%N treatment by increasing the transportation of assimilates from stems and leaves to pods in both peanut varieties,whereas no effect was found under 100%N treatment.Moreover,Mg application increased the NUE under 50%N treatment.No improvement of NUE in either peanut variety was found under 100%N treatment,while Mg application under the 50%N treatment can obtain a higher economic benefit than the 100%N treatment.In acidic soil,application of 307.5 kg ha^(-1)of Mg sulfate fertilizer under 50%reduced nitrogen application is a suitable fertilizer management measure for improving carbon assimilation,NUE and achieve high peanut yields in southern China. 展开更多
关键词 PEANUT Magnesium YIELD reduced nitrogen application rate
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A guidance and control design with reduced information for a dual-spin stabilized projectile
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作者 Yu Wang Jiyan Yu +1 位作者 Xiaoming Wang Jia Fangxiu 《Defence Technology(防务技术)》 SCIE EI CAS CSCD 2024年第3期494-505,共12页
In this paper,an integrated guidance and control method based on an adaptive path-following controller is proposed to control a spin-stabilized projectile with only translational motion information under the constrain... In this paper,an integrated guidance and control method based on an adaptive path-following controller is proposed to control a spin-stabilized projectile with only translational motion information under the constraint of an actuator,uncertainties in aerodynamic parameters and measurements,and control system complexity.Owing to the fairly high rotation speed,the dynamic model of this missile is strongly nonlinear,uncertain and coupled in pitch,yaw and roll channels.A theoretical equivalent resultant force and uncertainty compensation method are comprehensively used to realize decoupling of pitch and yaw.In response to the strong nonlinear and time-varying characteristics of the dynamic system,the quasi-linear model whose parameters are obtained by interpolation of points selected as the segmentation points in the trajectory envelope,is used for calculation in each step.To cope with the system uncertainty caused by model approximation,parameter uncertainty and ballistic interference,an extended state estimator is used to compensate the output feedback according to the test ballistic angle.In order to improve the tracking efficiency and ensure the tracking error convergence with only translational motion information,the virtual guide point,whose derivative is deduced according to the Lyapunov principle,is calculated in real time according to the projection relationship between the real-time position and the reference trajectory,and a virtual line-of-sight angle and the backstepping method are used for the design of the guidance and control system.In order to avoid the influence of control input saturation on the guidance and control performance due to the actuator limitation and improve the robustness of the system,an anti-saturation compensator is designed according to the two-step method.The feasibility and effectiveness of the path-following controller is verified through closed-loop flight simulations with measurement,control,and condition uncertainties.The results indicate that the designed controller can converge to the reference path and evidently decrease the distance between the impact point and target under different uncertainties. 展开更多
关键词 Spin-stabilized projectile reduced information Path-following control Extended state observer Coupled nonlinear system Input saturation
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Ultrahydrophobic melamine sponge via interfacial modification with reduced graphene oxide/titanium dioxide nanocomposite and polydimethylsiloxane for oily wastewater treatment
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作者 Hamidatu Alhassan Ying Woan Soon +1 位作者 Anwar Usman Voo Nyuk Yoong 《Water Science and Engineering》 EI CAS CSCD 2024年第2期139-149,共11页
Three-dimensional(3D)porous absorbents have attracted significant attention in the oily wastewater treatment technology due to their high porosity and elasticity.Given their amphiphilic surface,they have a propensity ... Three-dimensional(3D)porous absorbents have attracted significant attention in the oily wastewater treatment technology due to their high porosity and elasticity.Given their amphiphilic surface,they have a propensity to simultaneously absorb water and oil,which restricts their range of applications.In this study,a reduced graphene oxide and titanium dioxide nanocomposite(rGO/TiO_(2))was used to fabricate an ultra-hydrophobic melamine sponge(MS)through interfacial modification using a solution immersion technique.To further modify it,poly-dimethylsiloxane(PDMS)was grafted onto its surface to establish stronger covalent bonds with the composite.The water contact angle of the sponge(rGO/TiO_(2)/PDMS/MS)was 164.2°,which satisfies the condition for ultrahydrophobicity.The evidence of its water repellency was demonstrated by the Cassie-Baxter theory and the lotus leaf effect.As a result of the increased density of rGO/TiO_(2)/PDMS/MS,it recorded an initial capacity that was 2 g/g lower than the raw MS for crude oil absorption.The raw MS retained 53% of its initial absorption capacity after 20 cycles of absorption,while rGO/TiO_(2)/PDMS/MS retained 97%,suggesting good recyclability.Excellent oil and organic solvent recovery(90%-96%)was demonstrated by rGO/TiO_(2)/PDMS/MS in oil-water combinations.In a continuous separation system,it achieved a remarkable separation efficiency of 2.4×10^(6)L/(m^(3)·h),and in turbulent emulsion separation,it achieved a demulsification efficiency of 90%-91%.This study provides a practical substitute for massive oil spill cleaning. 展开更多
关键词 Oily wastewater reduced graphene oxide Polydimethylsiloxane(PDMS) Emulsion separation Melamine sponge
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Reduce函数的不可交换性检测
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作者 朱晨璐 王熙 +1 位作者 常博博 杨振 《电脑编程技巧与维护》 2024年第1期37-39,共3页
MapReduce是一种流行的编程模型,通过分而治之的思想很好地解决了许多并行计算问题。然而,在其广泛应用的背后还存在着非常严峻的考验。MapReduce程序可能因为输入数据到达Reduce函数的顺序不同而产生不确定的输出结果。为了使MapReduc... MapReduce是一种流行的编程模型,通过分而治之的思想很好地解决了许多并行计算问题。然而,在其广泛应用的背后还存在着非常严峻的考验。MapReduce程序可能因为输入数据到达Reduce函数的顺序不同而产生不确定的输出结果。为了使MapReduce程序的输出更加可靠,需要对Reduce函数的不可交换性进行检测。针对上述问题,提出了一种Reduce函数的不可交换性检测方法。首先,通过简化循环的符号执行方法及程序分析方法,生成具有针对性的原始测试用例;其次,通过一种能够快速改变记录行间相对位置的置换函数Ex生成后继测试用例;最后,通过比较原始测试用例及后继测试用例的执行结果是否相同,来检测Reduce函数的不可交换性。实验结果表明,该方法扩大了可以测试的Reduce函数种类,将测试用例集的大小从阶乘级别缩小到线性级别,降低了检测Reduce函数不可交换性的复杂度和难度。 展开更多
关键词 MAPreduce模型 reduce函数 不可交换性 并行计算 符号执行
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Roller Screw and Threaded Chain Speed Reducer: An Experimental Evaluation
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作者 Filiberto Gutiérrez 《Modern Mechanical Engineering》 2024年第1期1-11,共11页
We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuratio... We are developing a speed reducer that can be considered a transformation of a worm gear reducer: the worm is replaced by an inverted roller screw, and the gear is replaced by a threaded chain drive. This configuration lessens wear, increases load capacity, and improves efficiency. The threaded chain consists of nut-shaped links. This paper presents the results of tests carried out on a prototype with a reduction ratio of 46. 展开更多
关键词 Speed reducer Inverted Roller Screw Chain Drive Threaded Chain Drive
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高等数学课程融入软件REDUCE的教学实践研究
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作者 林府标 杨欣霞 《兴义民族师范学院学报》 2023年第3期72-76,共5页
高等数学是高校一门抽象性强、逻辑性严密、符号计算多的公共基础课。软件REDUCE融入高等数学教育,是引领高校符号育人实效性的实践路径,价值导向是用REDUCE的直观性、简捷性、高效性,以激发符号美学和怡情的活力。实现价值塑造、知识... 高等数学是高校一门抽象性强、逻辑性严密、符号计算多的公共基础课。软件REDUCE融入高等数学教育,是引领高校符号育人实效性的实践路径,价值导向是用REDUCE的直观性、简捷性、高效性,以激发符号美学和怡情的活力。实现价值塑造、知识传递和能力培养的三全育人目标。展望高等数学融入REDUCE能为国内高校教师吸收、借鉴国外优秀教学理念和教学成果,为高等数学教育提高教学质量、提升人才培养水平做出贡献。 展开更多
关键词 高等数学 软件reduce 符号育人 实践路径
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Reduced graphene oxide aerogel decorated with Mo_(2)C nanoparticles toward multifunctional properties of hydrophobicity,thermal insulation and microwave absorption 被引量:3
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作者 Yahui Wang Minghui Zhang +5 位作者 Xuesong Deng Zhigang Li Zongsheng Chen Jiaming Shi Xijiang Han Yunchen Du 《International Journal of Minerals,Metallurgy and Materials》 SCIE EI CAS CSCD 2023年第3期536-547,共12页
Reduced graphene oxide(rGO)aerogels are emerging as very attractive scaffolds for high-performance electromagnetic wave absorption materials(EWAMs)due to their intrinsic conductive networks and intricate interior micr... Reduced graphene oxide(rGO)aerogels are emerging as very attractive scaffolds for high-performance electromagnetic wave absorption materials(EWAMs)due to their intrinsic conductive networks and intricate interior microstructure,as well as good compatibility with other electromagnetic(EM)components.Herein,we realized the decoration of rGO aerogel with Mo_(2)C nanoparticles by sequential hydrothermal assembly,freeze-drying,and high-temperature pyrolysis.Results show that Mo_(2)C nanoparticle loading can be easily controlled by the ammonium molybdate to glucose molar ratio.The hydrophobicity and thermal insulation of the rGO aerogel are effectively improved upon the introduction of Mo_(2)C nanoparticles,and more importantly,these nanoparticles regulate the EM properties of the rGO aerogel to a large extent.Although more Mo_(2)C nanoparticles may decrease the overall attenuation ability of the rGO aerogel,they bring much better impedance matching.At a molar ratio of 1:1,a desirable balance between attenuation ability and impedance matching is observed.In this context,the Mo_(2)C/r GO aerogel displays strong reflection loss and broad response bandwidth,even with a small applied thickness(1.7 mm)and low filler loading(9.0wt%).The positive effects of Mo_(2)C nanoparticles on multifunctional properties may render Mo_(2)C/r GO aerogels promising candidates for high-performance EWAMs under harsh conditions. 展开更多
关键词 Mo_(2)C/reduced graphene oxide aerogel microwave absorption dielectric loss HYDROPHOBICITY thermal insulation
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Engineering CoMoO_(4) in reduced graphene oxide as superior cathode hosts for advanced room-temperature sodium-sulfur batteries 被引量:1
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作者 Xin Ye Sainan Luo +5 位作者 Zhiqi Li Jiafeng Ruan Yuepeng Pang Junhe Yang John Wang Shiyou Zheng 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第11期620-627,I0013,共9页
Promising room-temperature sodium-sulfur(RT Na-S)battery systems rely on purposely designed highperforming and low-cost electrode materials.Nevertheless,there are the challenges of irreversible dissolution and slow re... Promising room-temperature sodium-sulfur(RT Na-S)battery systems rely on purposely designed highperforming and low-cost electrode materials.Nevertheless,there are the challenges of irreversible dissolution and slow redox kinetics of NaPSs in the complete discharge of sulfur capacity.Herein,engineered CoMoO_(4)in reduced graphene oxide(CoMoO_(4)@rGO)is reported as a class of superior cathode hosts for RT Na-S batteries.The CoMoO_(4)@rGO matrix is designed to facilitate the reversible sodiation and desodiation of sulfur,considering the strong chemisorption between sulfur(and short-chain sodium sulfides)and CoMoO_(4),which alleviates the shuttle effect of sodium sulfides and accelerates the electrochemical reaction rate at RT.The obtained S/CoMoO_(4)@rGO cathode with~52%S loading exhibits a high capacity of520.1 mA h g^(-1)after 100 cycles at 0.1 A g^(-1).Moreover,an enhanced long-term performance at high current densities(212.2 mA h g^(-1)at 4 A g^(-1)over 1000 cycles)with high Coulombic efficiency(~100%)is also achieved.This work demonstrates a novel multifunctional additive for RT Na-S battery cathodes,which is expected to promote the long-waited development towards practical applications of RT Na-S batteries. 展开更多
关键词 Sodium-sulfur battery CATHODE CoMoO_(4) reduced graphene oxide
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Reduced graphene oxide-embedded nerve conduits loaded with bone marrow mesenchymal stem cell-derived extracellular vesicles promote peripheral nerve regeneration 被引量:1
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作者 Wei Zhang Xing-Xing Fang +2 位作者 Qi-Cheng Li Wei Pi Na Han 《Neural Regeneration Research》 SCIE CAS CSCD 2023年第1期200-206,共7页
We previously combined reduced graphene oxide(rGO)with gelatin-methacryloyl(GelMA)and polycaprolactone(PCL)to create an rGO-GelMA-PCL nerve conduit and found that the conductivity and biocompatibility were improved.Ho... We previously combined reduced graphene oxide(rGO)with gelatin-methacryloyl(GelMA)and polycaprolactone(PCL)to create an rGO-GelMA-PCL nerve conduit and found that the conductivity and biocompatibility were improved.However,the rGO-GelMA-PCL nerve conduits differed greatly from autologous nerve transplants in their ability to promote the regeneration of injured peripheral nerves and axonal sprouting.Extracellular vesicles derived from bone marrow mesenchymal stem cells(BMSCs)can be loaded into rGO-GelMA-PCL nerve conduits for repair of rat sciatic nerve injury because they can promote angiogenesis at the injured site.In this study,12 weeks after surgery,sciatic nerve function was measured by electrophysiology and sciatic nerve function index,and myelin sheath and axon regeneration were observed by electron microscopy,immunohistochemistry,and immunofluorescence.The regeneration of microvessel was observed by immunofluorescence.Our results showed that rGO-GelMA-PCL nerve conduits loaded with BMSC-derived extracellular vesicles were superior to rGO-GelMA-PCL conduits alone in their ability to increase the number of newly formed vessels and axonal sprouts at the injury site as well as the recovery of neurological function.These findings indicate that rGO-GelMA-PCL nerve conduits loaded with BMSC-derived extracellular vesicles can promote peripheral nerve regeneration and neurological function recovery,and provide a new direction for the curation of peripheral nerve defect in the clinic. 展开更多
关键词 ANGIOGENESIS AXON bone mesenchymal stem cell extracellular vesicles hybrid nanofibers myelin sheath nerve conduit neurological function peripheral nerve injury reduced graphene oxide
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Impact of vericiguat on heart failure with reduced ejection fraction:a review 被引量:1
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作者 Manisha Vohra Mohammad Amir +2 位作者 Ian Osoro Amit Sharma Ranjeet Kumar 《Global Health Journal》 2023年第3期123-129,共7页
Introduction:Heart failure is a major public health issue with a prevalence of about 26 million people worldwide.Reduced nitric oxide availability,lower soluble guanylate cyclase(sGC)activity,and decreased cyclic guan... Introduction:Heart failure is a major public health issue with a prevalence of about 26 million people worldwide.Reduced nitric oxide availability,lower soluble guanylate cyclase(sGC)activity,and decreased cyclic guanosine monophosphate(cGMP)production are the causes of HF's development.Vericiguat prescribed under the brand name Verquvo was approved by U.S.Food and Drug Administration(FDA)in January 2021.It is a novel agent and the first sGC stimulator which helps to treat patients suffering from heart failure with reduced ejection fraction(HFrEF).Objective:The mechanism of action(cGMP pathway)of vericiguat,its clinical trials,its use in the treatment of heart failure,and its possible future aspects in therapeutic recommendations are all covered in this review.It will also raise awareness amongst healthcare professionals about the pharmacokinetic and pharmacodynamic parameters,dosing,administration,and drug-related problems of this new drug.Methods:Various databases for drug review were used in this review like PubMed,Medline,Google scholar,Drug bank,U.s.FDA,Medscape,and European society of cardiology guidelines.A total of 58 articles were screened out of which 39 articles were included in this review.Results:This review discusses vericiguat's mechanism of action(cGMP pathway),clinical studies,application in the treatment of heart failure,and potential future considerations in therapeutic recommendations.It will also educate healthcare professionals about the new drug's pharmacokinetics and pharmacodynamics,dose,administration,and drug-related problems.Conclusion:After hospitalization for HFrEF,the 5-year survival rate is just 25%,and disease morbidity and death are stil significant.As adjunctive therapy for individuals with heart failure and a low ejection fraction,vericiguat has a moderate level of effectiveness.Vericiguat's efficacy as an adjunct therapy to different drugs used to cure HF has to be further investigated.Vericiguat's safety and dosage in patients who have severe renal or hepatic illness need to be studied further. 展开更多
关键词 Vericiguat Heart failure with reduced ejection fraction Soluble guanylate cyclase stimulator Nitric oxide Cyclicguanosinemonophosphate
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Deep learning-based magnetic resonance imaging reconstruction for improving the image quality of reduced-field-of-view diffusionweighted imaging of the pancreas 被引量:1
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作者 Yukihisa Takayama Keisuke Sato +3 位作者 Shinji Tanaka Ryo Murayama Nahoko Goto Kengo Yoshimitsu 《World Journal of Radiology》 2023年第12期338-349,共12页
BACKGROUND It has been reported that deep learning-based reconstruction(DLR)can reduce image noise and artifacts,thereby improving the signal-to-noise ratio and image sharpness.However,no previous studies have evaluat... BACKGROUND It has been reported that deep learning-based reconstruction(DLR)can reduce image noise and artifacts,thereby improving the signal-to-noise ratio and image sharpness.However,no previous studies have evaluated the efficacy of DLR in improving image quality in reduced-field-of-view(reduced-FOV)diffusionweighted imaging(DWI)[field-of-view optimized and constrained undistorted single-shot(FOCUS)]of the pancreas.We hypothesized that a combination of these techniques would improve DWI image quality without prolonging the scan time but would influence the apparent diffusion coefficient calculation.AIM To evaluate the efficacy of DLR for image quality improvement of FOCUS of the pancreas.METHODS This was a retrospective study evaluated 37 patients with pancreatic cystic lesions who underwent magnetic resonance imaging between August 2021 and October 2021.We evaluated three types of FOCUS examinations:FOCUS with DLR(FOCUS-DLR+),FOCUS without DLR(FOCUS-DLR−),and conventional FOCUS(FOCUS-conv).The three types of FOCUS and their apparent diffusion coefficient(ADC)maps were compared qualitatively and quantitatively.RESULTS FOCUS-DLR+(3.62,average score of two radiologists)showed significantly better qualitative scores for image noise than FOCUS-DLR−(2.62)and FOCUS-conv(2.88)(P<0.05).Furthermore,FOCUS-DLR+showed the highest contrast ratio and 600 s/mm^(2)(0.72±0.08 and 0.68±0.08)and FOCUS-DLR−showed the highest CR between cystic lesions and the pancreatic parenchyma for the b-values of 0 and 600 s/mm2(0.62±0.21 and 0.62±0.21)(P<0.05),respectively.FOCUS-DLR+provided significantly higher ADCs of the pancreas and lesion(1.44±0.24 and 3.00±0.66)compared to FOCUS-DLR−(1.39±0.22 and 2.86±0.61)and significantly lower ADCs compared to FOCUS-conv(1.84±0.45 and 3.32±0.70)(P<0.05),respectively.CONCLUSION This study evaluated the efficacy of DLR for image quality improvement in reduced-FOV DWI of the pancreas.DLR can significantly denoise images without prolonging the scan time or decreasing the spatial resolution.The denoising level of DWI can be controlled to make the images appear more natural to the human eye.However,this study revealed that DLR did not ameliorate pancreatic distortion.Additionally,physicians should pay attention to the interpretation of ADCs after DLR application because ADCs are significantly changed by DLR. 展开更多
关键词 Deep learning-based reconstruction Magnetic resonance imaging reduced field-of-view Diffusion-weighted imaging PANCREAS
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N-acetylcysteine and reduced glutathione reverse flupirtine-induced liver injury and pro⁃duce other beneficial effects in combination with flupirtine
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作者 CHEN Yanming CHEN Jinsong 《中国药理学与毒理学杂志》 CAS 北大核心 2023年第S01期28-29,共2页
OBJECTIVE To assess whether N-acetylcysteine(NAC)and reduced glutathione(GSH)are effective in reversing flupirtine-induced hepatotoxicity and whether they have other beneficial effects when combined with flupirtine.ME... OBJECTIVE To assess whether N-acetylcysteine(NAC)and reduced glutathione(GSH)are effective in reversing flupirtine-induced hepatotoxicity and whether they have other beneficial effects when combined with flupirtine.METHODS The analgesic effects of NAC and flupirtine were first evaluated in carrageenaninduced inflammatory pain and paclitaxel-induced neuropathic pain.The combination subthreshold⁃ing approach was then used to determine whether the combination of NAC and flupirtine produced synergistic analgesic effects.Hepatotoxicity markers and histopathological examination of the liver were used to assess the efficacy of NAC and GSH in reversing flupirtine-induced hepato⁃toxicity.Finally,the effect of GSH on the safe range of flupirtine was assessed in an acute tox⁃icity assay.RESULTS Flupirtine and NAC pro⁃duced dose-dependent antiallodynic effects evoked by carrageenan and paclitaxel in mice.In the above model,the combination of NAC and flupirtine produced an unexpected synergistic analgesic effect.There were no significant differ⁃ences observed in the hepatotoxicity markers and liver histopathology between the experimen⁃tal group and the control group under NAC and GSH treatment.Finally,GSH(200 mg·kg^(-1))expanded the therapeutic index of flupirtine by 1.77 times.CONCLUSION NAC and GSH are effective in preventing liver damage caused by long-term flupirtine use,which provides a solu⁃tion for the safe and effective treatment of chronic pain with flupirtine.In addition,the other benefi⁃cial effects of NAC and GSH when combined with flupirtine may provide the basis for the devel⁃opment of a new therapy with minimal sideeffects and good efficacy. 展开更多
关键词 N-ACETYLCYSTEINE reduced glutathione FLUPIRTINE HEPATOTOXICITY
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Green synthesis of three-dimensional magnesium ferrite/titanium dioxide/reduced graphene from Garcinia mangostana extract for crystal violet photodegradation and antibacterial activity
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作者 Tong Hoang Lin Che Quang Cong +10 位作者 Nguyen Thanh Hoai Nam Hoang An Nguyen Duy Hai Ton That Buu Thoi Le Nhat Binh Hoang Le Minh Lam Thanh Ngan Hoang Thuy Kim Ngan Du Chi Vi Ta Dang Khoa Nguyen Huu Hieu 《Journal of Semiconductors》 EI CAS CSCD 2023年第12期111-124,共14页
In this study,three-dimensional porous magnesium ferrite/titanium dioxide/reduced graphene oxide(Mg Fe_2O_(4)-GM/TiO_(2)/rGO(MGTG))was successfully synthesized via green and hydrothermal-supported co-precipitation met... In this study,three-dimensional porous magnesium ferrite/titanium dioxide/reduced graphene oxide(Mg Fe_2O_(4)-GM/TiO_(2)/rGO(MGTG))was successfully synthesized via green and hydrothermal-supported co-precipitation methods using the extract of Garcinia mangostana(G.mangostana)as a reducing agent.The characterization results indicate the successful formation of the nano/micro Mg Fe_(2)O_(4)(MFO)and TiO_(2) on the structure of the reduced graphene oxide(rGO),which can also act as efficient support,alleviating the agglomeration of the nano/micro MFO and TiO_(2).The synergic effects of the adsorption and photodegradation activity of the material were investigated according to the removal of crystal violet(CV)under ultraviolet light.The effects of catalyst dosage,CV concentration,and p H on the CV removal efficiency of the MGTG were also investigated.According to the results,the CV photodegradation of the MGTG-200 corresponded to the pseudo-first-order kinetic model.The reusability of the material after 10 cycles also showed a removal efficiency of 92%.This happened because the materials can easily be recollected using external magnets.In addition,according to the effects of different free radicals·O_(2)^(-),h^(+),and·OH on the photodegradation process,the photocatalysis mechanism of the MGTG was also thoroughly suggested.The antibacterial efficiency of the MGTG was also evaluated according to the inhibition of the Gram-positive bacteria strain Staphylococcus aureus(S.aureus).Concurrently,the antibacterial mechanism of the fabricated material was also proposed.These results confirm that the prepared material can be potentially employed in a wide range of applications,including wastewater treatment and antibacterial activity. 展开更多
关键词 magnesium ferrite titanium dioxide reduced graphene oxide Garcinia mangostana PHOTODEGRADATION ANTIBACTERIAL
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Manufacturing N,O-carboxymethyl chitosan-reduced graphene oxide under freeze-dying for performance improvement of Li-S battery
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作者 Zhibin Jiang Lujie Jin +8 位作者 Xiying Jian Jinxia Huang Hongshuai Wang Binhong Wu Kang Wang Ling Chen Youyong Li Xiang Liu Weishan Li 《International Journal of Extreme Manufacturing》 SCIE EI CAS CSCD 2023年第1期282-305,共24页
Lithium-sulfur(Li-S) batteries can provide far higher energy density than currently commercialized lithium ion batteries, but challenges remain before it they are used in practice.One of the challenges is the shuttle ... Lithium-sulfur(Li-S) batteries can provide far higher energy density than currently commercialized lithium ion batteries, but challenges remain before it they are used in practice.One of the challenges is the shuttle effect that originates from soluble intermediates, like lithium polysulfides. To address this issue, we report a novel laminar composite, N,O-carboxymethyl chitosan-reduced graphene oxide(CC-rGO), which is manufactured via the self-assembly of CC onto GO and subsequent reduction of GO under an extreme condition of 1 Pa and-50°C. The synthesized laminar CC-rGO composite is mixed with acetylene black(AB) and coated on a commercial polypropylene(PP) membrane, resulting in a separator(CC-rGO/AB/PP) that can not only completely suppress the polysulfides penetration, but also can accelerate the lithium ion transportation, providing a Li-S battery with excellent cyclic stability and rate capability. As confirmed by theoretic simulations, this unique feature of CC-rGO is attributed to its strong repulsive interaction to polysulfide anions and its benefit for fast lithium ion transportation through the paths paved by the heteroatoms in CC. 展开更多
关键词 composite manufacturing N O-carboxymethyl chitosan reduced graphene oxide SEPARATOR lithium-sulfur battery
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Mechanically flexible reduced graphene oxide/carbon composite films for high-performance quasi-solid-state lithium-ion capacitors
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作者 Wenjie Liu Yabin An +8 位作者 Lei Wang Tao Hu Chen Li Yanan Xu Kai Wang Xianzhong Sun Haitao Zhang Xiong Zhang Yanwei Ma 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2023年第5期68-76,I0003,共10页
Practical applications of diverse flexible wearable electronics require electrochemical energy storage(EES)devices with multiple configurations.Moreover,to fabricate flexible EES devices with high energy density and s... Practical applications of diverse flexible wearable electronics require electrochemical energy storage(EES)devices with multiple configurations.Moreover,to fabricate flexible EES devices with high energy density and stability,organic integration from electrode design to device assembly is required.To address these challenges,a free-standing reduced graphene oxide(rGO)/carbon film with a unique sandwich structure has been designed via the assistance of vacuum-assistant filtration for lithium-ion capacitors(LICs).The graphene acts as not only a binder to construct a three-dimensional conductive network but also an active material to provide additional capacitive lithium storage sites,thus enabling fast ion/electron transport and improving the capacity.The designed rGO/hard carbon(rGO/HC)and rGO/activated carbon(rGO/AC)free-standing films exhibit enhanced specific capacities(513.7 mA h g^(-1)for rGO/HC and 102.8 mA h g^(-1)for rGO/AC)and excellent stability.Moreover,the integrated flexible quasi-solid-state rGO/AC//rGO/HC LIC devices possess a maximum energy density of 138.3 Wh kg^(-1),a high power density of 11 kW kg^(-1),and improved cycling performance(84.4%capacitance maintained after 10,000 cycles),superior to the AC//HC LIC(43.5%retention).Such a strategy enlightens the development of portable flexible LICs. 展开更多
关键词 Lithium-ion capacitors Free-standing films reduced graphene oxide Carbon materials
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Preparation of Poly-α-Olefin Microcapsule Particles Coated with Polyurethane as a Drag Reducer Based on Interface Polymerization
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作者 Li Chenhao Lu Yong +6 位作者 Li Hao Chen Yue Meng Yeqiao Zhou Pengfei Xu Dan Wang Yiran Zhang Xiaolai 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第2期101-112,共12页
The molecular behavior of polyurethane(PU)coating materials during the surface adsorption of poly-α-olefin as a drag reducing polymer was explored by a molecular dynamics simulation.Three different PU capsule wall ma... The molecular behavior of polyurethane(PU)coating materials during the surface adsorption of poly-α-olefin as a drag reducing polymer was explored by a molecular dynamics simulation.Three different PU capsule wall materials were synthesized using two reaction monomers,and a poly-α-olefin/PU drag reducer microcapsule was prepared based on interface polymerization.The structure,morphology,thermal stability,compressive strength,and drag reduction performance of the microcapsules were characterized and compared.The results showed that a non-bonding interaction induced the adsorption of the PU coating material,poly-α-olefin and PU then fused at the interface,and the PU coating material was embedded into the inner grooves of poly-α-olefin in the form of a local mosaic,thereby forming a stable core–shell structure.The morphological characterization indicated that PU and poly-α-olefin could form microcapsule structures.The thermal decomposition temperature of the microcapsule was dependent on the type of capsule wall material.The microcapsule structure had a slight effect on poly-α-olefin drag reduction.The system enabled poly-α-olefin to exist in powdered particles through microcapsulation,and had a good dispersion effect that facilitated storage and transport processes.The method effectively inhibited the accumulation and bonding of poly-α-olefin at room temperature. 展开更多
关键词 drag reducer poly-α-olefin POLYURETHANE microcapsules particles interfacial polymerization
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Subsea Compensation of Pressure Based on Reducer Bellows
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作者 Shihong Xiao Shichao Zhou +2 位作者 Linlin Yue Xianyou He Maolin Xiang 《Fluid Dynamics & Materials Processing》 EI 2023年第10期2549-2567,共19页
In this study,the pressure compensation mechanism of a reducer bellows is analyzed.This device is typically used to reduce the size of undersea instruments and improve related pressure resistance and sealing capabilit... In this study,the pressure compensation mechanism of a reducer bellows is analyzed.This device is typically used to reduce the size of undersea instruments and improve related pressure resistance and sealing capabilities.Here,its axial stiffness is studied through a multi-fold approach based on theory,simulations and experiments.The results indicate that the mechanical strength of the reducer bellows,together with the oil volume and temperature are the main factors influencing its performances.In particular,the wall thickness,wave number,middle distance,and wave height are the most influential parameters.For a certain type of reducer bellows,the compensation capacity attains a maximum when the wave number ratio is between 6:6 and 8:4,the wall thickness is 0.3 mm,and the wave height is between 4–5 mm and 5–6 mm.Moreover,the maximum allowable ambient pres-sure of the optimized reducer bellows can reach 62.6 MPa without failure,and the maximum working water depth is 6284 m. 展开更多
关键词 Subsea reducer bellows pressure compensation compressible fluid mechanical strength
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Synthesis and Performance of an Associative Anti-shear Drag Reducer Based on Hydrogen Bond Association of Dodecyl Methacrylate
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作者 Lu Yong Li Chenhao +5 位作者 Li Hao Chen Yue Xu Dan Wang Yiran Meng Yeqiao Zhang Xiaolai 《China Petroleum Processing & Petrochemical Technology》 SCIE CAS CSCD 2023年第1期23-33,共11页
Using K2S2O8-Na2SO3 as the redox initiation system,a hydrogen-bond-association-based dodecyl methacrylate system associative anti-shear drag reducer was synthesised by standard emulsion polymerisation.The reaction pro... Using K2S2O8-Na2SO3 as the redox initiation system,a hydrogen-bond-association-based dodecyl methacrylate system associative anti-shear drag reducer was synthesised by standard emulsion polymerisation.The reaction process was simple and gentle as well as safe and stable.Molecular design was carried out using molecular dynamics simulation methods.The results of infrared spectroscopy,thermogravimetric analysis,differential scanning calorimetry,gel chromatography,and laser light scattering showed that the reaction polymerisation was relatively complete,the product was uniform,the molecular weight distribution was controllable,and the synthesised polymer had good flexibility.The donor lauryl methacrylate-styrene-methacrylic acid(LMA-St-MAA)and acceptor lauryl methacrylate-styrene-dimethylaminoethyl methacrylate(LMA-St-DMA)polymers had an associative intermolecular interaction force,which increased the molecular cluster size of the associative system complex.The complex had good shear resistance,and the test results of the tube pump shear test showed that the synthesised associative oil-soluble polymer drag reduction system exhibited better drag reduction rate performance than poly-α-olefins over repeated cycles.The research results provide a reference plan for minimising the number of station-to-station inputs,thereby ensuring the stability of oil pipelines and reducing transportation costs. 展开更多
关键词 drag reducer associative effect drag reduction rate shear resistance
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Energy Proficient Reduced Coverage Set with Particle Swarm Optimization for Distributed Sensor Network
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作者 T.V.Chithra A.Milton 《Computer Systems Science & Engineering》 SCIE EI 2023年第5期1611-1623,共13页
Retransmission avoidance is an essential need for any type of wireless communication.As retransmissions induce the unnecessary presence of redundant data in every accessible node.As storage capacity is symmetrical to ... Retransmission avoidance is an essential need for any type of wireless communication.As retransmissions induce the unnecessary presence of redundant data in every accessible node.As storage capacity is symmetrical to the size of the memory,less storage capacity is experienced due to the restricted size of the respective node.In this proposed work,we have discussed the integration of the Energy Proficient Reduced Coverage Set with Particle Swarm Optimization(PSO).PSO is a metaheuristic global search enhancement technique that promotes the searching of the best nodes in the search space.PSO is integrated with a Reduced Coverage Set,to obtain an optimal path with only high-power transmitting nodes.Energy Proficient Reduced Coverage Set with PSO constructs a set of only best nodes based on the fitness solution,to cover the whole network.The proposed algorithm has experimented with a different number of nodes.Comparison has been made between original and improved algorithm shows that improved algorithm performs better than the existing by reducing the redundant packet transmissions by 18%~40%,thereby increasing the network lifetime. 展开更多
关键词 Wireless sensor network reduced coverage set swarm intelligence particle swarm optimization energy consumption
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Therapies for patients with coexisting heart failure with reduced ejection fraction and non-alcoholic fatty liver disease
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作者 Jose Arriola-Montenegro Renato Beas +5 位作者 Renato Cerna-Viacava Andres Chaponan-Lavalle Karla Hernandez Randich Diego Chambergo-Michilot Herson Flores Sanga Pornthira Mutirangura 《World Journal of Cardiology》 2023年第7期328-341,共14页
Heart failure with reduced ejection fraction(HFrEF)and nonalcoholic fatty liver disease(NAFLD)are two common comorbidities that share similar pathophysiological mechanisms.There is a growing interest in the potential ... Heart failure with reduced ejection fraction(HFrEF)and nonalcoholic fatty liver disease(NAFLD)are two common comorbidities that share similar pathophysiological mechanisms.There is a growing interest in the potential of targeted therapies to improve outcomes in patients with coexisting HFrEF and NAFLD.This manuscript reviews current and potential therapies for patients with coexisting HFrEF and NAFLD.Pharmacological therapies,including angiotensinconverting enzyme inhibitors/angiotensin receptor blockers,mineralocorticoids receptor antagonist,and sodium-glucose cotransporter-2 inhibitors,have been shown to reduce fibrosis and fat deposits in the liver.However,there are currently no data showing the beneficial effects of sacubitril/valsartan,ivabradine,hydralazine,isosorbide nitrates,digoxin,or beta blockers on NAFLD in patients with HFrEF.This study highlights the importance of considering HFrEF and NAFLD when developing treatment plans for patients with these comorbidities.Further research is needed in patients with coexisting HFrEF and NAFLD,with an emphasis on novel therapies and the importance of a multidisciplinary approach for managing these complex comorbidities. 展开更多
关键词 Non-alcoholic fatty liver disease Heart Failure Heart failure reduced ejection fraction Novel therapies Cardiovascular disease
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