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Free radicals trigger the closure of open pores in lignin-derived hard carbons toward improved sodium-storage capacity

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Journal of Energy Chemistry 2024年第7期94卷 551-559页

作者： Wen-Jun Ji Zong-Lin Yi Ming-Xin Song xiao-Qian Guo Yi-Lin Wang Yi-Xuan mao Fang-Yuan Su Jing-Peng Chen Xian-Xian Wei Li-Jing Xie Cheng-Meng Chen CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001ShanxiChina University of Chinese Academy of Sciences Beijing 100049China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China School of Environment and Safety Taiyuan University of Science and TechnologyTaiyuan 030001ShanxiChina

The chemical activation of various precursors is effective for creating additional closed pores in hard carbons for sodium ***,the formation mechanism of closed pores under the influence of pore-forming agents is not well ***,an effective chemical activation followed by a high-temperature self-healing strategy is employed to generate interconnected closed pores in lignin-derived hard carbon(HCs).By systematic experimental design combined with electron paramagnetic res-onance spectroscopy,it can be found that the content of free radicals in the carbon matrix influences the closure of open pores at high *** high activation temperature(>700 C)leads to a low free radical concentration,making it difficult to achieve self-healing of open pores at high *** activation at 700°C,a balance between pore making and self-healing is achieved in the final hard carbon.A large number of free radicals triggers rapid growth and aggregation of carbon microcrys-tals,blocking pre-formed open micropores and creating additional interconnected closed pores in as-obtained hard *** a result,the optimized carbon anode(LK-700-1300)delivers a high reversible capacity of 330.8 mA h g^(-1) at 0.03 A g^(-1),which is an increase of 86 mA h g^(-1) compared to the pristine lignin-derived carbon anode(L-700-1300),and exhibits a good rate performance(202.1 mA h g^(-1) at 1 A g^(-1)).This work provides a universal and effective guidance for tuning closed pores of hard carbons from otherprecursors.

关键词： Hard carbon Chemical activation Free radical Self-healing Closed pores Sodium ion batteries

Active precursor promoting nucleation/growth of MwW zeolite and controlling its morphology

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Petroleum Science 2023年第3期20卷 1922-1933页

作者： Shi-Wei Cao Peng xiao Jjie Wang Yu Sun Yun-Shan Shang Ya-Fen Ge Qi Liu yan-Jun Gong Guang Moo Zhi-Hong Li State Key Laboratory of Heavy OilProcessing Key Laboratory of Catalysis of CNPCChina University of Petroleum-BejingBejing 102249China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBejing 100039China Cangzhou Risun Chemical Co.Ltd. Hebei 061000China

MWW zeolites is an important catalyst in petrochemical ***,the efficient preparation of Mww zeolites still faces challenges,and the origin of influential factors for regulating its structure properties also remains ***,we designed a nanoscale amorphous silica-alumina species denoted as active precursor(APS),and adopt the APS in the HMI mixture to synthesize MCM-22 zeolite(APS-MWW)*** reveal the distinctive role of APS in promoting the crystallization of MWW zeolites,two crystal materials(ITQ-1 and MCM-22)and one mother liquor(ML)as seeds to synthesize three types of MWW ***,when adding APS in the synthetic mixture,the HMI amount was reduced to less than a quarter and crystallization time was reduced to 36 ***-MWW sample provides a smaller particle size(2-4μm)and thinner stacked layer thickness(5-20 nm).Synchrotron radiation Small Angle X-ray Scattering(SAXS)shows each seed has a different impact on the species'fractal structure and size distribution in the mixture,which is highly related to the nucleation and growth of MWW *** shows a large number of 6 membered ring(MR)structure units which play a sig-nificant role in boosting the rapid nucleation and growth of APS-MwW *** the synthesized MWW zeolites,the APS-MWW performs the highest ethylbenzene yield in the alkylation reaction of benzene-ethylene,which is attributed to its moderate flake thickness,appropriate texture properties and more external surface *** results will provide a new perspective for producing MwW-types zeolites by using the available and effective active precursor.

关键词： MWW zeolites Active precursor Small-angle X-ray scattering Benzene-ethylene alkylation reaction

Fast Algorithm for Lunar Craters Simulation

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Fast Algorithm for Lunar Craters Simulation

Effect of non-pharmacological treatment on the full recovery of social functioning in patients with attention deficit hyperactivity disorder

The International Conference on Automation and Robotics(ICAR 2011)

作者： Li Jian-Sheng Liu Wei-min Lan Chao-zhen mao xiao-yan Lu Zhan-wei Institute of Surveying and Mapping Information Engineering University Beijing Institute of Control Engineering 62217 Troops

In order to solve the lack of high resolution imagery and DEM in the accurate simulation of lunar terrain, a fast algorithm for simulating the lunar terrain is presented in this paper. The algorithm fits simple shapes of lunar craters based on rotational equation, and simulates the true distributing of craters using random function. The experimental results demonstrate that the proposed algorithm is not only effective in the simulating of craters which accord with the true lunar terrain well in shape and distributing but also actualizes the secondary impact of craters.

关键词： simulation crater rotational equation random function lunar

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World Journal of Clinical Cases 2023年第14期11卷 3238-3247页

作者： Ying-Bo Lv Wei Cheng Meng-Hui Wang xiao-Min Wang yan-Li Hu Lan-Qiu Lv Pediatric Health Care Section Ningbo Women and Children’s HospitalNingbo 315000Zhejiang ProvinceChina

BACKGROUND Long-term treatment of attention deficit/hyperactivity disorder(ADHD)is associated with adverse events,such as nausea and vomiting,dizziness,and sleep disturbances,and poor maintenance of late ADHD medication compromises treatment outcomes and prolongs the recovery of patients’social *** To evaluate the effect of non-pharmacological treatment on the full recovery of social functioning in patients with *** A total of 90 patients diagnosed with ADHD between May 2019 and August 2020 were included in the study and randomly assigned to either the pharmacological group(methylphenidate hydrochloride and tomoxetine hydrochloride)or the non-pharmacological group(parental training,behavior modification,sensory integration therapy,and sand tray therapy),with 45 cases in each *** measures included treatment compliance,Swanson,Nolan,and Pelham,Version IV(SNAP-IV)scores,Conners Parent Symptom Questionnaire(PSQ)scores,and Weiss Functional Impairment Rating Scale(WFIRS)*** The non-pharmacological interventions resulted in significantly higher compliance in patients(95.56%)compared with medication(71.11%)(P0.05).Patients with non-pharmacological interventions showed higher WFIRS scores for family,daily life skills,and self-concept than those in the pharmacological group(P<0.05).CONCLUSION Non-pharmacological interventions,in contrast to the potential risks of adverse events after longterm medication,improve patient treatment compliance,alleviate patients’behavioral symptoms of attention,impulsivity,and hyperactivity,and improve their cognitive ability,thereby improving family relationships and patient self-evaluation.

关键词： Non-pharmacological treatment Attention deficit hyperactivity disorder Social functioning Recovery Weiss Functional Impairment Rating Scale scores

Serotonin receptor 2B induces visceral hyperalgesia in rat model and patients with diarrhea-predominant irritable bowel syndrome

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World Journal of Gastroenterology 2024年第10期30卷 1431-1449页

作者： Zheng-yang Li Yu-Qing mao Qian Hua Yong-Hong Sun Hai-yan Wang Xuan-Guang Ye Jing-Xian Hu Ya-Jie Wang Miao Jiang Department of Gastroenterology Jinshan Hospital of Fudan UniversityShanghai 201508China Department of Gastroenterology Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China Department of Gastroenterology Dalian Friendship HospitalDalian 116001Liaoning ProvinceChina Department of Pathology Jinshan Hospital of Fudan UniversityShanghai 201508China

BACKGROUND Serotonin receptor 2B(5-HT2B receptor)plays a critical role in many chronic pain *** possible involvement of the 5-HT2B receptor in the altered gut sensation of irritable bowel syndrome with diarrhea(IBS-D)was investigated in the present *** To investigate the possible involvement of 5-HT2B receptor in the altered gut sensation in rat model and patients with *** Rectosigmoid biopsies were collected from 18 patients with IBS-D and 10 patients with irritable bowel syndrome with constipation who fulfilled the Rome IV criteria and 15 healthy *** expression level of the 5-HT2B receptor in colon tissue was measured using an enzyme-linked immunosorbent assay and correlated with abdominal pain *** IBS-D rat model was induced by intracolonic instillation of acetic acid and wrap *** in visceral sensitivity and 5-HT2B receptor and transient receptor potential vanilloid type 1(TRPV1)expression were examined following 5-HT2B receptor antagonist *** in visceral sensitivity after administration of the TRPV1 antago-INTRODUCTION Irritable bowel syndrome(IBS)is a chronic functional bowel disorder characterized by recurrent abdominal pain with altered bowel habits that affects approximately 15%of the population worldwide[1].IBS significantly impacts the quality of life of *** the pathogenesis of IBS is not completely understood,the role of abnormal visceral sensitivity in IBS has recently emerged[2,3].5-Hydroxytryptamine(5-HT)is known to play a key role in the physiological states of the gastrointestinal *** 5-HT levels in IBS with diarrhea(IBS-D)patients were greater than those in healthy controls[4],suggesting a possible role of 5-HT in the pathogenesis of *** serotonin receptor 2(5-HT2 receptor)family comprises three subtypes:5-HT2A,5-HT2B,and *** 5-HT2 receptors exhibit 46%-50%overall sequence identity,and all of these receptors preferentially bind to Gq/

关键词： Diarrhea-predominant irritable bowel syndrome Serotonin receptor 2B Transient receptor potential vanilloid type-1 Visceral hypersensitivity Abdominal pain

真空预压在有轨电车软土地基中的应用及数值模拟研究

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岩土工程学报 2016年第S1期38卷 141-146页

作者：庄妍王晓东崔晓艳河海大学土木与交通学院岩土工程研究所江苏南京210098 河海大学土木与交通学院江苏南京210098

近年来真空预压法在软土地基处理中得到广泛应用,基于南京某有轨电车软土地基真空预压处理工程实例进行数值模拟研究。对比加固区沉降、孔压结果可以看出:数值模拟结果偏大于现场监测结果,误差约为2.4%~32.5%,验证了数值模型的正确性。... 详细信息

近年来真空预压法在软土地基处理中得到广泛应用,基于南京某有轨电车软土地基真空预压处理工程实例进行数值模拟研究。对比加固区沉降、孔压结果可以看出:数值模拟结果偏大于现场监测结果,误差约为2.4%~32.5%,验证了数值模型的正确性。通过变化塑料排水板的通水能力、间距、打设深度影响因素,可以看出:塑料排水板打设深度对软土表面的沉降影响较大。通过沉降和孔隙水压力估算软土的固结度分别为93.4%和88.3%,说明了真空预压法对该软土地基的加固效果明显。

关键词：真空预压塑料排水板固结度

Effects of SiC amount on phase compositions and properties of Ti_3SiC_2-based composites

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Journal of Central South University 2015年第1期22卷 14-22页

作者：蔡艳芝殷小玮尹洪峰 College of Materials & Mineral Resources Xi'an University of Architecture and Technology State Key Laboratory of Solidification Processing (Northwestern Polytechnical University)

The phase compositions and properties of Ti3SiC2-based composites with SiC addition of 5%-30% in mass fraction fabricated by in-situ reaction and hot pressing sintering were studied. SiC addition effectively prevented TiC synthesis but facilitated SiC synthesis. The Ti3SiC2/Ti C-SiC composite had better oxidation resistance when SiC added quantity reached 20% but poorer oxidation resistance with SiC addition under 15% than Ti3SiC2/TiC composite at higher temperatures. There were more than half of the original SiC and a few Ti3SiC2 remaining in Ti3SiC2/Ti C-SiC with 20% SiC addition, but all constituents in Ti3Si2/TiC composite were oxidized after 12 h in air at 1500 °C. The oxidation scale thickness of TS30, 1505.78 μm, was near a half of that of T,2715 μm, at 1500 °C for 20 h. Ti3SiC2/Ti C composite had a flexural strength of 474 MPa, which was surpassed by Ti3SiC2/TiC-SiC composites when SiC added amount reached 15%. The strength reached the peak of 518 MPa at 20% SiC added amount.

关键词： in-situ reaction composites oxidation mechanical properties

Autoimmune encephalitis after surgery for appendiceal cancer:A case report

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World Journal of Clinical Cases 2023年第11期11卷 2576-2581页

作者： yan-Hui mao Lu Li Li-Ming Wen Jia-Min Qin Ya-Ling yang Li Wang Fan-Rong Wang Yi-Zhou Zhao Department of Gastroenterology Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina Department of Pathology Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina Department of Medical Imaging Sichuan Mianyang 404 HospitalMianyang 621000Sichuan ProvinceChina

BACKGROUND Primary cancer of the appendix is rare and often difficult to diagnose preoperatively due to the lack of specific clinical symptoms. Autoimmune encephalitis(AIE) is the most common cause of non-infectious encephalitis. The etiologies of AIE include tumors(paraneoplastic), infections(parainfections), or recessive infections. The tumors that have been reported to cause AIE include thymomas, ovarian teratomas, lung cancers, and breast cancers. However, there are no reports of AIE occurring after surgery for appendiceal cancer. This report describes the diagnosis and treatment of a patient with an appendiceal cancer and postoperative *** SUMMARY We report the case of a 47-year-old man who was transferred to our hospital due to a recurrent low intestinal obstruction. Abdominal enhanced computed tomography was used to consider the possibility of a terminal ileal tumor with serous infiltration and lymph node metastasis. A right hemi-colectomy was performed under general anesthesia with an ileo-transcolon anastomosis and laparoscopic exploration. The postoperative pathologic evaluation revealed a high-grade goblet cell carcinoma of the appendix, accompanied by mesangial and abdominal lymph node metastases, and neural tube and vascular infiltration. The operation was completed without complication. The patient developed restlessness on postoperative day 4, and gradually developed a disturbance of consciousness on postoperative day 6. He was transferred to West China Hospital of Sichuan University and diagnosed with *** Albeit rare, the occurrence of neurologic and psychiatric symptoms in patients with an appendiceal cancer postoperatively suggests the possibility of AIE.

关键词： Appendiceal cancer Goblet cell carcinoma Repeated ileus Postoperative Autoimmune encephalitis Case report

Bioinspired zinc-mediated umpolung thiolation of alkyl electrophiles: reaction development, scope and mechanism

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Science China Chemistry 2024年第3期67卷 898-907页

作者： Yuenian Xu yan Zhang Yong Liu Wen-Wu Sun Jie Huang Hui He Yingjie Wu Wen Liu Shao-Fei Ni Xu-Qiong xiao Xinxin Shao College of Material Chemistry and Chemical EngineeringKey Laboratory of Organosilicon Chemistry and Material Technology of Ministry of EducationHangzhou Normal UniversityHangzhou 311121China School of Pharmaceutical Sciences South-Central Minzu UniversityWuhan 430074China Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guang-dong Province Shantou UniversityShantou 515063China

Zinc-promoted umpolung thiolation of alkyl electrophiles with masked sulfur transfer reagents in the absence of nickel or copper catalysis is described. This protocol proceeds via a SET process of Zn to electrophilic sulfur reagent followed by insertion of Zn into disulfide and nucleophilic thiolation, providing straightforward access to a wide range of alkyl sulfides with broad substrate scope. A neutral TMEDA-ligated four-coordinated zinc thiolate with tetrahedra geometry was synthesized, isolated and fully characterized by NMR, IR and X-ray analysis. More importantly, the chemical reactivity of this active intermediate has been investigated, enabling the construction of C-Se, C-Te, Sb-S and Bi-S bonds to prepare valuable sulfur-containing molecules and beyond.

关键词： umpolung thiolation C(sp^(3))-S bond formation masked sulfur reagents reductive coupling

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