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Atomically dispersed calcium as solid strong base catalyst with high activity and stability

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Green Energy & Environment 2024年第10期 1619-1626页

作者： Xiang-Bin Shao Zhi-Wei Xing si-yu liu Ke-Xin Miao Shi-Chao Qi Song-Song Peng Xiao-Qin liu Lin-Bing Sun State Key Laboratory of Materials-Oriented Chemical Engineering Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM)College of Chemical EngineeringNanjing Tech University30 South Puzhu Road

Solid strong base catalysts are highly attractive for diverse reactions owing to their advantages of neglectable corrosion,facile separation,and environmental ***,their widespread applications are impeded by basic components aggregation and low *** this work,we fabricate single calcium atoms on graphene （denoted as Ca1/G） by use of a redox strategy for the first time,producing solid strong base catalyst with high activity and *** precursor Ca（NO3）2is first reduced to CaO at 400℃ by the support graphene,forming CaO/G with conventional basic sites,and the subsequent reduction at 850℃ results in the generation of Ca1/G with atomically dispersed *** characterizations reveal that Ca single atoms are anchored on graphene in tetra-coordination （Ca–C2–N2） where N is in situ doped from Ca（NO3）*** atomically dispersed Ca,along with their anchoring on the support,endow Ca1/G with high activity and stability toward the transesterification reaction of ethylene carbonate with *** turnover frequency value reaches 128.0 h-1on Ca1/G,which is much higher than the traditional counterpart CaO/G and various reported solid strong bases (2.9–46.2 h-1).Moreover,the activity of Ca1/G is well maintained during 5 cycles,while 60% of activity is lost for the conventional analogue CaO/G due to the leaching of Ca.

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Huoxue Tongjiang decoction-resisted reflux esophagitis by activation stem cell factor/c-kit/interstitial cell of cajal pathway and regulating the T-helper 17/regulatory T-cells balance in rats

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Traditional Medicine Research 2024年第12期9卷 1-12页

作者： Yan liu Yan-Ping Tang Pei-Cai Li Lei liu Xi liu si-yu liu Lei Yang Division of Gastroenterology Hospital of Integrated Chinese and Western MedicineTianjin University of Traditional Chinese MedicineTianjin 300000China Tianjin Key Laboratory of Acute Abdomen Disease Associated Organ Injury and ITCWM Repair Hospital of Integrated Chinese and Western MedicineTianjin 300000China Institute of Integrative Medicine for Acute Abdominal Diseases Hospital of Integrated Chinese and Western MedicineTianjin 300000China

Background:Huoxue Tongjiang decoction(HXTJD)is an effective prescription for treating reflux esophagitis(RE).We investigated the effects of HXTJD on esophageal motility and mucosal inflammation in a rat RE ***:Chemical composition of HXTJD was analyzed by ultrahigh-performance liquid chromatography Q-Orbitrap mass spectrometry(MS).The change rates of mean contraction tension forces,mean amplitudes,and mean frequencies for the lower esophageal sphincter(LES)were recorded using the isolated tissue bath system,mechanical tension transducer,and PowerLab physiological *** weighing the stomach,the phenol red labeling method was used to measure the gastric emptying *** LES ultrastructure was observed through transmission electron *** and western blotting were used to detect the number of interstitial cells of Cajal(ICC)and the expression levels of c-kit protein,connexin43(Cx43),and stem cell factor(SCF).Flow cytometric analysis and enzyme-linked immunosorbent assay were conducted to detect the percentages of T helper 17(Th17)cells and regulatory T(Treg)cells and the serum concentrations of interleukin 6(IL-6),interleukin 17(IL-17),and interleukin 10(IL-10)in the ***:We identified 28 chemical constituents in *** esophageal motility,we revealed that HXTJD increased the mean contraction tension forces,mean amplitudes,and mean frequency change rate of LES and the gastric emptying rate;decreased stomach weight;and improved the LES ***,HXTJD increased the number of ICC-positive cells,and c-kit,Cx43,and SCF expression *** esophageal inflammation,HXTJD significantly decreased the percentage of Th17 cells,and IL-6 and IL-17 concentrations,and increased the percentage of Treg cells and IL-10 ***:HXTJD was found to be efficacious in the rat RE *** may promote esophageal motility and alleviate the inflammatory response by activating the SCF/c-kit/ICC

关键词： Huoxue Tongjiang decoction reflux esophagitis SCF/c-kit/ICC pathway Th17/Treg cell esophageal motility mucosal inflammation

Advances in monoclonal antibody application in myocarditis

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2013年第8期14卷 676-687页

作者： Li-na HAN Shuang HE yu-tang WANG Li-ming YANG si-yu liu Ting ZHANG Department of Cardiovascular Internal Medicine Nanlou Branch of Chinese PLA General Hospital

Monoclonal antibodies have become a part of daily preparation technologies in many laboratories. Attempts have been made to apply monoclonal antibodies to open a new train of thought for clinical treatments of autoimmune diseases, inflammatory diseases, cancer, and other immune-associated diseases. This paper is a prospective review to anticipate that monoclonal antibody application in the treatment of myocarditis, an inflammatory disease of the heart, could be a novel approach in the future. In order to better understand the current state of the art in monoclonal antibody techniques and advance applications in myocarditis, we, through a significant amount of literature research both domestic and abroad, developed a systematic elaboration of monoclonal antibodies, pathogenesis of myocarditis, and application of monoclonal antibodies in myocarditis. This paper presents review of the literature of some therapeutic aspects of monoclonal antibodies in myocarditis and dilated cardiomyopathy to demonstrate the advance of monoclonal antibody application in myocarditis and a strong anticipation that monoclonal antibody application may supply an effective therapeutic approach to relieve the severity of myocarditis in the future. Under conventional therapy, myocarditis is typically associated with congestive heart failure as a progressive outcome, indicating the need for alternative therapeutic strategies to improve long-term results. Reviewing some therapeutic aspects of monoclonal antibodies in myocarditis, we recently found that monoclonal antibodies with high purity and strong specificity can accurately act on target and achieve definite progress in the treatment of viral myocarditis in rat model and may meet the need above. However, several issues remain. The technology on how to make a higher homologous and weak immunogenic humanized or human source antibody and the treatment mechanism of monoclonal antibodies may provide solutions for these open issues. If we are to fu

关键词： Monoclonal antibody Myocarditis Dilated cardiomyopathy

Intracranial infection and sepsis in infants caused by Salmonella derby:A case report

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世界临床病例杂志 2023年第28期11卷 6961-6966页

作者： Jing-Lu yu Li-Li Jiang Rong Dong si-yu liu Department of Clinical Laboratory The Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000Zhejiang ProvinceChina Department of Neonatology The Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000Zhejiang ProvinceChina

BACKGROUND Salmonella derby(***)is a Gram-negative diplococcus that is common in the digestive *** patients generally experience symptoms such as fever and *** cases are mostly self-healing gastroenteritis,and severe cases can cause fatal typhoid *** cases are more common in *** most common form of *** infection is self-healing gastroenteritis,in which,fever lasts for about 2 d and diarrhea forsion,there was one sudden convulsion,characterized by unclear consciousness,limb twitching,gaze in both eyes,and slight cyanosis on the *** fluid(CSF)culture was positive for Gram-negative bacilli,which conformed to *** treatment with meropenem and ceftriaxone antibiotics,the patient was discharged home in a clinically stable state after 4 wk of *** We reported a rare case of *** cultured in *** enters the CSF through the blood–brain barrier,causing purulent *** not treated timeously,it can lead to serious,life-threatening infection.

关键词： Salmonella derby Infants Cerebrospinal fluid Case report

Neisseria mucosa-A rare cause of peritoneal dialysis-related peritonitis:A case report

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World Journal of Clinical Cases 2023年第14期11卷 3311-3316页

作者： Jian-Min Ren Xiao-Yao Zhang si-yu liu Department of Clinical Laboratory The Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000Zhejiang ProvinceChina Department of Rehabilitation The Fifth Affiliated Hospital of Wenzhou Medical UniversityLishui 323000Zhejiang ProvinceChina The Key Laboratory of Imaging Diagnosis and Minimally Invasive Interventional Research of Zhejiang Province Zhejiang University Lishui HospitalLishui 323000Zhejiang ProvinceChina

BACKGROUND Neisseria mucosa is a gram negative diplococcus belonging to the genus Neisseria found commonly in the upper respiratory *** is typically a commensal organism when it is parasitic on oral and nasal *** our knowledge,it does not cause disease in healthy individuals with normal immunity,but can be pathogenic in those with impaired immune function or change in bacterial colonization *** mucosa has been reported to cause bacterial meningitis,conjunctivitis,pneumonia,endocarditis,peritonitis and ***,peritoneal dialysis-related peritonitis caused by Neisseria mucosa is extremely rare in clinical practice,which has not previously been reported in *** SUMMARY A 55-year-old female presented to the nephrology clinic with upper abdominal pain without apparent cause,accompanied by nausea,vomiting and diarrhea for two *** patient had a history of Stage 5 chronic kidney disease for five years,combined with renal hypertension and renal anemia,and was treated with peritoneal dialysis for renal replacement *** patient was subsequently diagnosed with peritoneal dialysis-related *** examination of peritoneal dialysis fluid showed abdominal infection,and the results of microbial culture of the peritoneal dialysis fluid confirmed Neisseria ***-penem/cilastatin 1.0 g q12h was added to peritoneal dialysis fluid for anti-infection *** 24 d,the patient underwent upper extremity arteriovenous *** month later,the patient was discharged home in a clinically stable *** Peritonitis caused by Neisseria mucosa is *** with home-based self-dialysis cannot guarantee good medical and health conditions,and require education on self-protection.

关键词： Peritoneal dialysis Peritonitis Neisseria mucosa Case report

Dendrite-free lithium anode achieved under lean-electrolyte condition through the modification of separators with F-functionalized Ti_(3)C_(2)nanosheets

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Journal of Energy Chemistry 2022年第3期31卷 366-373,I0010页

作者： Qiang Zhang Xiao Wei yu-si liu Xin liu Wen-Long Bai Zhen Zhang Kai-Xue Wang Jie-Sheng Chen School of Chemistry and Chemical Engineering State Key Laboratory of Metal Matrix CompositesShanghai Jiao Tong UniversityShanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Materials Processing and Mold of Ministry of Education Zhengzhou UniversityZhengzhou 450001HenanChina

An unstable solid electrolyte interphase(SEI)and chaotic lithium ion fux are key impediments to commercial high-energy-density lithium batteries because of the uncontrolled growth of rigid lithium dendrites,which would pierce through the conventional polypropylene(PP)separator,causing short circuit and safety ***,the homogenization of lithium ion fux and the generation of stable SEI layers on lithium anodes were achieved via coating a fuorine-functionalized Ti_(3)C_(2)(F-Ti_(3)C_(2))nanosheets on PP separator(F-Ti_(3)C_(2)@PP).F-Ti_(3)C_(2)nanosheets provide abundant ions pathways to homogeneously manipulate lithium ion fux and increase the Young’s modulus and electrolyte wettability of the *** addition,F species derived from the F-Ti_(3)C_(2)nanosheets would promote the formation of Li F-rich SEI *** synergistic effect contribute to the uniform lithium *** Li|Li,asymmetric Li|Cu and full Li|Li Fe PO4cells incorporated with the modified separators exhibit improved electrochemical performance even under lean electrolyte *** work provides a feasible strategy to improve the performance of lithium batteries through both fuoridized SEI formation and lithium ion fux manipulation.

关键词： Lithium metal Fluorine-functionalized Ti_(3)C_(2) Dendrite growth Separator modification Lean electrolyte

Nonlinear finite element analysis of three implant-abutment interface designs

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International Journal of Oral Science 2012年第2期4卷 101-108页

作者： Chun-Bo Tang si-yu liu Guo-Xing Zhou Jin-Hua yu Guang-Dong Zhang Yi-Dong Baot Qiu-Ju Wang Dental Research Institute Nanjing Medical University Nanjing China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics

The objective of this study was to investigate the mechanical characteristics of implant-abutment interface design in a dental implant system, using nonlinear finite element analysis （FEA） method. This finite element simulation study was applied on three commonly used commercial dental implant systems： model I, the reduced-diameter 3i implant system （West Palm Beach, FL, USA） with a hex and a 12-point double internal hexagonal connection; model II, the Semados implant system （Bego, Bremen, Germany） with combination of a conical （45° taper） and internal hexagonal connection; and model III, the Br,~nemark implant system （Nobel Biocare, Gothenburg, Sweden） with external hexagonal connection. In simulation, a force of 170 N with 45°oblique to the longitudinal axis of the implant was loaded to the top surface of the abutment. It has been found from the strength and stiffness analysis that the 3i implant system has the lowest maximum yon Mises stress, prirlcipal stress and displacement, while the Br^nemark implant system has the highest. It was concluded from our preliminary study using nonlinear FEA that the reduced-diameter 3i implant system with a hex and a 12-point double internal hexagonal connection had a better stress distribution, and produced a smaller displacement than the other two implant systems.

关键词： external hexagonal connection finite element analysis implant-abutment interface internal hexagonal connection non-linear analysis

Interface and border trapping effects in normally-off Al2O3/AlGaN/GaN MOS-HEMTs with different post-etch surface treatments

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Chinese Physics B 2020年第10期29卷 459-463页

作者： si-Qi Jing Xiao-Hua Ma Jie-Jie Zhu Xin-Chuang Zhang si-yu liu Qing Zhu yue Hao School of Advanced Materials and Nanotechnology Xidian UniversityXi'an 710071China Key Laboratory of Wide Bandgap Semiconductor Technology Xidian UniversityXi'an 710071China

Trapping effect in normally-off Al2O3/AlGaN/GaN metal–oxide–semiconductor (MOS) high-electron-mobility transistors (MOS-HEMTs) with post-etch surface treatment was studied in this paper. Diffusion-controlled interface oxidation treatment and wet etch process were adopted to improve the interface quality of MOS-HEMTs. With capacitance–voltage (C–V) measurement, the density of interface and border traps were calculated to be 1.13 × 10^12 cm^−2 and 6.35 × 10^12 cm^−2, effectively reduced by 27% and 14% compared to controlled devices, respectively. Furthermore, the state density distribution of border traps with large activation energy was analyzed using photo-assisted C–V measurement. It is found that irradiation of monochromatic light results in negative shift of C–V curves, which indicates the electron emission process from border traps. The experimental results reveals that the major border traps have an activation energy about 3.29 eV and the change of post-etch surface treatment process has little effect on this major activation energy.

关键词： AlGaN/GaN MOS-HEMTs interface traps border traps photo-assisted C-V measurement

Surface yttrium-doping induced by element segregation to suppress oxygen release in Li-rich layered oxide cathodes

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Tungsten 2022年第4期4卷 336-345页

作者： si-yu liu yu-Huan Zhou Yi-Bin Zhang Sheng-Jie Xia Ying Li Xin Zhou Bao Qiu Guang-Jie Shao Zhao-Ping liu Ningbo Institute of Materials Technology and Engineering Chinese Academy of SciencesNingbo315201China College of Environmental and Chemical Engineering State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao066004China University of Chinese Academy of Sciences Beijing100049China Science and Chemical Engineering Ningbo UniversityNingbo315211China College of Chemical Engineering Zhejiang University of TechnologyHangzhou310014China

Doping electrochemically inert elements in Li-rich layered oxide cathodes usually stabilizes the structure to improve electrochemical performance at the expense of available ***,we use an element segregation principle to realize a uniform surface doping without capacity *** the basis of Hume-Rothery rule,element yttrium is chosen as a candidate dopant to spontaneously segregate at particle surface due to mismatched ionic *** with X-ray photoelectron spectroscopy and electron energy loss spectroscopy mapping,yttrium is demonstrated uniformly distributed on particle *** importantly,a significant alleviation of oxygen release after surface doping is detected by operando differential electrochemical mass *** a result,the modified sample exhibits improved reversibility of oxygen redox with 82.1%coulombic efficiency and excellent cycle performances with 84.15%capacity retention after 140 *** analysis by transmission electron microscopy,Raman spectroscopy and X-ray diffraction reveal that the modified sample maintains the layered structure without a significant structure transformation after long *** work provides an effective strategy with a series of elements to meet the industrial application.

关键词： Li-ion batteries Cathode materials Li-rich layered oxides Surface doping