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Carbon steel anticorrosion performance and mechanism of sodium lignosulfonate

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Rare Metals 2024年第1期43卷 356-365页

作者： Bo-Kai Liao rui-Xuan Quan Ping-Xian Feng huan Wang Wei Wang Li Niu School of Chemistry and Chemical Engineering Guangzhou Key Laboratory of Sensing Materials and DevicesJoint Institute of Guangzhou University and Institute of Corrosion Science and TechnologyGuangzhou UniversityGuangzhou 510006China

Lignin is a typical biological macromolecule with a three-dimensional network structure and abundant functional groups. It has excellent ionic complexation ability and amphiphilic molecular structure *** this study, the carbon steel anticorrosion performance of sodium lignosulfonate(SLS) in an acid solution was evaluated using the weight loss method, electrochemical measurements, scanning vibration electrode technique(SVET), and surface characterization methods. SLS exhibited excellent corrosion inhibition efficiency for Q235carbon steel in 1 mol·L^(-1) HCl, reaching a maximum value of 98%. A low SLS concentration of 20 mg·L^(-1) resulted in the maximum corrosion inhibition efficiency, which remained nearly constant at higher SLS *** SVET test demonstrated that the formation of an SLS adsorption film can impede corrosion. This study confirms the significance of the application of green biomass resources in the field of metal corrosion protection and green functional materials.

关键词： Lignin Sodium lignosulfonate Corrosion inhibitor Carbon Steel

Correlation between psychological traits and the use of smart medical services in young and middle-aged adults: An observational study

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World Journal of Psychiatry 2024年第8期14卷 1224-1232页

作者： Hu Zhang Yan Liu rui gu Department of Internet Hospital Management The Third People's Hospital of ChengduChengdu 610031Sichuan ProvinceChina Department of Neurology The Third People's Hospital of ChengduThe Affiliated Hospital of Southwest Jiaotong UniversityChengdu 610031Sichuan ProvinceChina

BACKGROUND Psychological problems affect economic ***,there is a huge gap between mental health service resources and mental health service *** mental health service technology and platforms cannot meet all the diverse mental health needs of *** medicine is a new medical system based online that can effectively improve the quality and efficiency of medical services and make mental health services *** To explore the level of intelligent medical use among young and middle-aged people and its correlation with psychological *** Convenience sampling was used to select 200 young and middle-aged patients with medical experience at the Third People's Hospital of Chengdu between January 2022 and January 2023 as the research *** general condition Questionnaire,Eysenck Personality Questionnaire,Symptom Checklist-90,General Health Questionnaire,and Smart Medical Service Use Intention Questionnaire were used to collect ***’s correlation was used to analyze the correlation between the participants’willingness to use smart medical services and their personality characteristics,psychological symptoms,and mental *** The results revealed that the mental health of young and middle-aged people was poor,and some had psycho-logical problems such as anxiety,depression,and physical ***,acceptance,and usage of smart healthcare in this population are at a medium level,and these levels correlate with psychological *** was positively correlated with E,and negatively correlated with P,anxiety,fear,anxiety/insomnia,and social *** degree of use was negatively correlated with P,obsessive-compulsive symptoms,depression,anxiety,hostility,paranoia,and somatic *** The familiarity,acceptance,and usage of smart medical services among the middle-aged and young groups are related to various psychological characteristics.

关键词： Young and middle-aged people Smart healthcare Willingness to serve Psychological characteristics Questionnaire survey Relevance

Colloidal semiconductor nanocrystals for light emission and photonic integration

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Chip 2024年第1期3卷 1-17页

作者： huan Liu Dabin Lin Puning Wang Tingchao He rui Chen Department of Electrical and Electronic Engineering Southern University of Science and TechnologyShenzhen 518055China Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and guangdong Province College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

Solution-processed colloidal semiconductor nanocrystals(NCs)have become attractive materials for the development of optoelectronic and photonic devices due to their inexpensive synthesis and excellent optical ***,CdSe NCs with different dimensions and structures have achieved significant progress in photonic integrated circuits(PICs),including light generation(laser),guiding(waveguide),modulation,and detection on a *** article summarizes the development of CdSe NCs–based lasers and discusses the challenges and opportunities for the application of CdSe NCs in ***,an overview of the optical properties of CdSe-based NCs with different dimensions is presented,with emphasis on the amplified stimulated emission and laser ***,the nanophotonic devices and PICs based on CdSe NCs are introduced and ***,the prospects for PICs are addressed.

关键词： CdSe nanocrystals Amplified spontaneous emission Waveguide Laser Photonic integrated circuits

Evolution of mechanical parameters of Shuangjiangkou granite under different loading cycles and stress paths

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第4期16卷 1113-1126页

作者： Liangjie gu Xia-Ting Feng rui Kong Chengxiang Yang Yuelin Xia Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines Northeastern UniversityShenyang110819China State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil MechanicsChinese Academy of SciencesWuhan430071China

Surrounding rocks at different locations are generally subjected to different stress paths during the process of deep hard rock *** this study,to reveal the mechanical parameters of deep surrounding rock under different stress paths,a new cyclic loading and unloading test method for controlled true triaxial loading and unloading and principal stress direction interchange was proposed,and the evolution of mechanical parameters of Shuangjiangkou granite under different stress paths was studied,including the deformation modulus,elastic deformation increment ratios,fracture degree,cohesion and internal friction ***,stress path coefficient was defined to characterize different stress paths,and the functional relationships among the stress path coefficient,rock fracture degree difference coefficient,cohesion and internal friction angle were *** results show that during the true triaxial cyclic loading and unloading process,the deformation modulus and cohesion gradually decrease,while the internal friction angle gradually increases with increasing equivalent crack *** stress path coefficient is exponentially related to the rock fracture degree difference *** the stress path coefficient increases,the degrees of cohesion weakening and internal friction angle strengthening decrease *** cyclic loading and unloading under true triaxial principal stress direction interchange,the direction of crack development changes,and the deformation modulus increases,while the cohesion and internal friction angle decrease slightly,indicating that the principal stress direction interchange has a strengthening effect on the surrounding ***,the influences of the principal stress interchange direction on the stabilities of deep engineering excavation projects are discussed.

关键词： Triaxial cyclic loading and unloading test Stress path Deformation modulus and elastic deformation increment ratios Fracture degree Cohesion and internal friction angle

Effects of Maillard reaction and its product AGEs on aging and age-related diseases

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Food Science and Human Wellness 2024年第3期13卷 1118-1134页

作者： huan Peng Yuqi Gao Chenye Zeng rui Hua Yannan guo Yida Wang Zhao Wang Protein Science Key Laboratory of the Ministry of Education School of Pharmaceutical SciencesTsinghua UniversityBeijing 100084China

Maillard reaction(MR)is a non-enzymatic browning reaction commonly seen in food processing,which occurs between reducing sugars and compounds with amino *** certain advantages based on Maillard reaction products(MRPs)found in some food for health and storage application have appeared,however,the MR occurring in human physiological environment can produce advanced glycation end products(AGEs)by non-enzymatic modification of macromolecules such as proteins,lipids and nucleic acid,which could change the structure and functional activity of the molecules *** this review,we take AGEs as our main object,on the one hand,discuss physiologic aging,that is,age-dependent covalent cross-linking and modification of proteins such as collagen that occur in eyes and skin containing connective *** the other hand,pathological aging associated with autoimmune and inflammatory diseases,neurodegenerative diseases,diabetes and diabetic nephropathy,cardiovascular diseases and bone degenerative diseases have been mainly *** on the series of adverse effects of accelerated aging and disease pathologies caused by MRPs,the possible harm caused by some MR can be slowed down or inhibited by artificial drug intervention,dietary pattern and lifestyle *** also stimulates people's curiosity to continue to explore the potential link between the MR and human aging and health,which should be paid more attention to for the development of life sciences.

关键词： Maillard reaction Advanced glycation end products Physiologic aging Pathological aging Drug intervention

Characterization of the current crowding effect on chip surface using a quantum wide-field microscope

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Chinese Optics Letters 2024年第6期22卷 123-128页

作者： rui Zhao Ding Wang huan Fei Wen Yunbo Shi Jun Tang Jun Liu Science and Technology on Electronic Test&Measurement Laboratory North University of ChinaTaiyuan 030051China

We characterize the current crowding effect for microwave radiation on a chip surface based on a quantum wide-field microscope combining a wide-field reconstruction technique. A swept microwave signal with the power of 0–30 d Bm is supplied to a dumbbell-shaped microstrip antenna, and the significant differences in microwave magnetic-field amplitudes attributed to the current crowding effect are experimentally observed in a 2.20 mm ×1.22 mm imaging area. The normalized microwave magnetic-field amplitude along the horizontal geometrical center of the image area further demonstrates the feasibility of the characterization of the current crowding effect. The experiments indicate the proposal can be qualified for the characterization of the anomalous area of the radio-frequency chip surface.

关键词： current crowding effect microwave field on chip surface quantum wide-field microscope nitrogen-vacancy center

Dynamic Response of A Group of Cylindrical Storage Tanks with Baffles Considering the Effect of Soil Foundation

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China Ocean Engineering 2024年第1期38卷 129-143页

作者： SUN Ying WANG Jia-dong HUO rui-li ZHOU Ding gu Zhen-yuan QIAN Wang-ping School of Transportation and Civil Engineering Nantong UniversityNantong 226019China Faculty of Civil Engineering and Mechanics Jiangsu UniversityZhenjiang 212013China College of Civil Engineering Nanjing Tech UniversityNanjing 211816China

The sloshing in a group of rigid cylindrical tanks with baffles and on soil foundation under horizontal excitation is studied *** solutions for the velocity potential are derived out by the liquid subdomain *** models with mass-spring oscillators are established to replace continuous *** with the least square technique,Chebyshev polynomials are employed to fit horizontal,rocking and horizontal-rocking coupling impedances of soil,respectively.A lumped parameter model for impedance is presented to describe the effects of soil on tank structures.A mechanical model for the soil-foundation-tank-liquid-baffle system with small amount of calculation and high accuracy is proposed using the substructure *** analytical solutions are in comparison with data from reported literature and numerical codes to validate the effectiveness and correctness of the *** dynamic properties and seismic responses of the soil-tank system are given for the baffle number,size and location as well as soil parameter.

关键词： cylindrical tanks multiple annular baffles equivalent analytical model soil−structure interaction subdomain method dynamic response

Photocatalytic Site-Selective Cascade Radical Addition of Biaryl Ynones for the Construction of Spiro-and Fused Carbon Rings

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Chinese Journal of Chemistry 2024年第14期42卷 1599-1605页

作者： Kairui Liu Chunhang Zhao Liji gu Xiang Li Jiali Yan Siqi Lao Weiwei huan Yan Zhang Key Laboratory of the Ministry of Education for Advanced Catalysis Materials and Drug Discovery&Innovation CenterCollege of Chemistry and Materials ScienceZhejiang Normal UniversityJinhuaZhejiang321004 China Zhejiang Provincial Key Laboratory of Chemical Utilization of Forestry Biomass College of Chemistry and Materials EngineeringZhejiang A&F UniversityHangzhouZhejiang311300 China

Functionalized free radical addition/cyclization reactions represent an efficient way for introducing new functionality or coupling fragments to *** are good regional selectivity radical acceptors in organic synthesis,and many of bio-relevant cyclic compounds could be easily obtained by direct radical cyclization ***,we report a photocatalytic cascade radical addition of biaryl ynones,for the divergent synthesis of privileged carbon ***,further transformation of the multi-functional group product into a variety of other derivatives demonstrates the synthetic value of this developed method.

关键词： Ynones Photocatalysis Cascade cyclization Alkoxycarbonyl radical Dearomatization Biaryls Regioselectivity Radical reactions

Plasma‐oxidized 2D MXenes subnanochannel membrane for high‐performance osmotic energy conversion

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Carbon Energy 2024年第8期6卷 178-191页

作者： Zhengmao Ding Tiancheng gu rui Zhang Shouyi Sun Kaiqiang Wang Hanli Zhang Jinjin Li Yunjun Luo State Key Laboratory of Tribology in Advanced Equipment Tsinghua UniversityBeijingChina Key Laboratory of High Energy Density Materials Ministry of EducationBeijing Institute of TechnologyBeijingChina Department of Engineering Mechanics Northwestern Polytechnical University(Chang'an Campus)Xi'anChina

Nanofluidic channels inspired by electric eels open a new era of efficient harvesting of clean blue osmotic energy from salinity *** by less charge and weak ion selectivity of the raw material itself,energy conversion through nanofluidic channels is still facing considerable ***,a facile and efficient strategy to enhance osmotic energy harvesting based on drastically increasing surface charge density of MXenes subnanochannels via oxygen plasma is *** plasma could break Ti–C bonds in the MXenes subnanochannels and effectively facilitate the formation of more Ti–O,C═O,O–OH,and rutile with a stronger negative charge and work function,which leads the surface potential of MXenes membrane to increase from 205 to 430 *** significant rise of surface charge endows the MXenes membrane with high cation selectivity,which could make the output power density of the MXenes membrane increase by 248.2%,reaching a high value of 5.92Wm^(−2)in the artificial sea‐river water ***,with the assistance of low‐quality heat at 50℃,the osmotic power is enhanced to an ultrahigh value of 9.68Wm^(−2),which outperforms those of the state‐of‐the‐art two‐dimensional(2D)nanochannel *** exciting breakthrough demonstrates the enormous potential of the facile plasma‐treated 2D membranes for osmotic energy harvesting.

关键词： ion transport MXenes membranes osmotic energy harvesting plasma two‐dimensional nanochannels