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World Journal of Clinical Cases 2022年第33期10卷 12257-12260页

作者： Bai-Hui Wang ru.Yuan li Department of Gastroenterology Qilu HospitalCheeloo College of MedicineQingdao 266035Shandong ProvinceChina

BACKGROUND Peroral endoscopic myotomy(POEM)is an established treatment option for esophageal ***,technical challenges and failures *** fibrosis is a rare cause of aborted POEM *** SUMMARY We performed POEM with an elastic ring for achalasia with obvious submucosal *** short-term outcome was excellent,surgery time was significantly shorter,and success rate was higher with POEM for achalasia with obvious submucosal *** POEM performed with an elastic ring is a feasible and effective endoscopic treatment modality for achalasia with obvious submucosal fibrosis.

关键词： Peroral endoscopic myotomy Elastic ring Achalasia Submucosal fibrosis Case report

Facile Synthesis of Polycarbonate Diol via Copolymerization of CO_(2) and Cyclohexene Oxide Catalysed by a Combination of One-Component Phosphonium Borane Lewis Pair and Water

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Chinese Journal of Polymer Science 2023年第5期41卷 735-744,I0009页

作者： Xiao-Wu Wang Ji-Wen Hui Yu-Tao li Yan-ru.Gu Zhi-Bo li State Key Laboratory Base of Eco-Chemical Engineering/College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Biobased Polymer Materials Shandong Provincial Education Department/School of Polymer Science and EngineeringQingdao University of Science and TechnologyQingdao 266042China

Well-defined polycarbonate diol was successfully synthesized through a strategy using a combination of organocatalyst and *** strategy was less developed in organocatalyzed polymerization and frequently regarded as side ***,one-component phosphonium borane Lewis pairs PB1-PB8 were successfully applied in the copolymerization of CO_(2) and cyclohexene oxide(CHO)to generate poly(CHO-alt-CO_(2))carbonate(PCHC).Parameters of linker length and counter anion effects on the catalyst activity were *** was found that Lewis pair PB3 served as a dual initiator and catalyst in the copolymerization of CHO and CO_(2) with or without the presence of *** contrast,Lewis pair PB8 can serve as a tru. catalyst for the preparation of well-definedα,ω-hydroxyl PCHC *** was achieved by introducing a labile CF3COO group as counter anion through anion exchange reaction while water molecules acted as chain transfer *** function of trifluoroacetate group in the polymerization process was investigated in detail and possible mechanism was *** changing the amount of water and catalyst loading,PCHC diols with varied molecular weight(1.5 kg/mol to 7.5 kg/mol),low dispersities(D99%)could be easily *** low molecular weight PCHC diol was used as a bifunctional macroinitiator for the ring-opening polymerization of L-lactide(LLA)to afford ABA triblock copolymer in one-pot synthesis.

关键词： Polycarbonate Phosphonium borane Lewis pair CO_(2)utilization Organocatalysis Ring-opening polymerization

Effect of sintering temperature on the electrolysis of TiO_2

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International Journal of Minerals,Metallurgy and Materials 2012年第7期19卷 636-641页

作者： Ze-quan li li-yue ru.Cheng-guang Bai Na Zhang Hai-hua Wang College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China College of Materials Science and Engineering Chongqing University Chongqing 400044 China

The effects of sintering temperature on the microstru.ture and the conductivity of TiO2 cathodes were studied by examining the phase composition, microstru.ture, and element contents of the sintered cathodes and the cathodic products using X-ray diffraction and scan- ning electronic microscopy-energy dispersive spectrometry. The oxygen vacancy, conductivity, average pore diameter, and specific surface area of the sintered cathodes were detected by X-ray photoelectron spectroscopy, four-point probe, and ASPA 2010. The results showed that TiO2 phase transformations occurred, and oxygen vacancies formed with the increase of sintering temperature. The cathodic conductivity improved, but the average pore diameter and the effective response area of the TiO2 cathode were reduced when the sintering temperature in- creased. These phenomena could weaken the contact between reaction ions and electrons and also had the same effect on the cathodes and the molten salt. Moreover, they were disadvantageous to ion migration, so a lower sintering temperature was favorable for the microstru.ture of electrolysis. Consequently, the cathodic conductivity may be improved, but the microstru.atre became compact with the increase of sin- tering temperature. The cathodic products at different temperatures indicated that the cathodic conductivity was more important for electroly- sis.

关键词： titanium dioxidegelectrolysis sintering microstru.ture

Shadow thermodynamics of an AdS black hole in regular spacetime

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Chinese Physics C 2022年第9期46卷 249-256页

作者： Sen Guo Guan-ru.li Guo-Ping li Guangxi Key Laboratory for Relativistic Astrophysics School of Physical Science and TechnologyGuangxi UniversityNanning 530004China School of Physics and Astronomy China West Normal UniversityNanchong 637000China

The dependence of the black hole(BH) shadow and thermodynamics may be stru.tured in regular spacetime. Taking a regular Bardeen-AdS BH as an example, the relationship between the shadow radius and event horizon radius is derived. It is found that these two radii display a positive correlation, implying that the BH temperature can be rewritten as a function of shadow radius in regular spacetime. By analyzing the phase transition curves under the shadow context, we find that the shadow radius can replace the event horizon radius to present the BH phase transition process, and the phase transition grade can also be revealed by the shadow radius, indicating that the shadow radius may serve as a probe for phase stru.ture in regular spacetime. Utilizing the temperature-shadow radius function, the thermal profile of the Bardeen-AdS BH is established. Moreover, the temperature exhibits an N-type change trend in the P lished in regular spacetime.

关键词： black hole shadow thermodynamics regular spacetime

Circumventing brittleness of 3D-printed Al_(2)O_(3)cellular ceramic stru.tures via compositing with polyurea

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Rare Metals 2024年第11期43卷 5994-6005页

作者： Xue-Qin Zhang ru.Yue Su Xiong Gao Jing-Yi Chen Guo liu ru.Jie He Ying li Institute of Advanced Stru.ture Technology Beijing Institute of TechnologyBeijing 100081China Department of Mechanical Engineering City University of Hong KongHongKong999077China

Benefiting from excellent mechanical properties and low density,cellular ceramic stru.tures(CCSs)are competitive candidates as stru.tural ***,inherent brittleness from strong chemical bonds among atoms extremely impeded CCSs'*** materials occupied outstanding strength and toughness simultaneously due to the dual-phase interpenetrated *** by natural materials,it was proposed to fabricate coating covered and fulfilled polyurea/CCS interpenetrated composites(C/CCSs and B/CCSs)to circumvent the brittleness of 3D-printed Al_(2)O_(3)*** was demonstrated that polyurea coating had less effect on the compressive strength of C/CCSs but tremendously improved their energy-absorbing *** energy-absorbing ability of C/CCSs was improved from26.48-52.57 kJ·m^(-3)of CCSs to 1.04-1.89 MJ·m^(-3)because of the extended plateau ***,compressive strength and energy-absorbing ability of B/CCSs were strengthened to 1.33-1.36 and 2.84-4.61 times of C/CCSs,***,failure mode of C/CCSs changed from localized deformation to fracturing entirely with the increase in relative density of CCSs inside,which was the same as that of ***,with the help of polyurea coating,C/CCSs were still intact at strains up to60%,which would neve r fail catastrophically as CCSs at low strains.B/CCSs tended to fracture as a whole,which was not influenced by relative density of pristine *** was believed that this work provided a creative way to circumvent the brittleness of CCSs and improve their mechanical performances.

关键词： Cellular ceramic stru.tures Dual-phase interpenetrated composites Energy-absorbing ability Compressive strength 3D printing

Short term effect of Salvia miltiorrhiza in treating rat acetic acid chronic gastric ulcer and long term effect in preventing recurrence

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World Journal of Gastroenterology 1998年第2期4卷 77-78页

作者： Wang, GZ ru. X Ding, LH li, HQ First Affiliated Hosp Qiqihaer Med Coll Dept Pathophysiol Qiqihaer 161042 Heilongjiang Peoples R China First Affiliated Hosp Qiqihaer Med Coll Dept Surg Qiqihaer 161042 Heilongjiang Peoples R China China Med Univ Dept Pathophysiol Shenyang 110001 Liaoning Peoples R China

AIM To study the short term effect of Danshen ( Salvia miltiorrhiza ) on acetic acid induced chronic gastric ulcer in rats and its long term effect in preventing recurrence. METHODS Rats with acetic acid induced gastric ulcer were treated with Danshen and cimetidine for 30 days. Traditional gastric mucosal auto radiography and 3H TdR incorporation into gastric mucosa in vitro were employed to study the effects of Danshen in rat acetic acid induced chronic gastric ulcer, including ulcer index (UI), ulcer inhibitory rate (IR) and label rate (LR). RESULTS On the day 5, 30 and 126 of ulcer making, the UI in the Danshen group was obviously lower than that in the cimetidine group and the control group (42 3±3 9, 3 6±1 2, 4 4±2 3; 49 1±3 6, 5 9±1 4, 9 2±1 3; 61 0±3 8, 8 9±2 5, 12 4±2 4, respectively, P ling and preventing recurrence. The mechanism of action is to strengthen the gastric mucosal barrier and to promote the gastric mucosal cell proliferation along the edge of the ulcer.

关键词： Danshen disease models, animal Salvia miltiorrhiza stomach ulcer acetic acid cimitidine gastric mucosa recurrence rats , Wistar chronic diseases

First-Principles Study on Electronic Stru.ture and Half-Metallic Properties of CoNCN and NiNCN

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Communications in Theoretical Physics 2009年第10期52卷 707-709页

作者： li Zhi-An CHEN Lang-Xing CAI Jing-ru Key Laboratory of Biomedical Polymer Ministry of Education School and Hospital of Stomatology Wuhan University Wuhan 430072 China Department of Chemistry Nankai University Tianjin 300071 China Henan North Hongyang Industry Corporation Nanyang474650 China

We studied the electronic stru.ture of the two new transition-metal carbodiimides CoNCN and NiNCN using first-principles method, which is based on density-functional theory （DFT）. The density of states （DOS）, the total energy of the cell and the spin magnetic moment of CoNCN and NiNCN were calculated. The calculations reveal that the compound CoNCN and NiNCN have hall-metallic properties in ferromagnetic ground state, and the spin magnetic moment per molecule is about 7.000 μB and 6.000 μB for CoNCN and NiNCN, respectively.

关键词： first-principles electronic stru.ture half-metallic properties

Advanced glycation end products induce neural tube defects through elevating oxidative stress in mice

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Neural Regeneration Research 2018年第8期13卷 1368-1374页

作者： ru.lin li Wei-Wei Zhao Bing-Yan Gao Laboratory for Development College of Life Sciences Northwest University

Our previous study showed an association between advanced glycation end products （AGEs） and neural tube defects （NTDs）. To understand the molecular mechanisms underlying the effect of AGEs on neural tube development, C57BL/6 female mice were fed for 4 weeks with com- mercial food containing 3% advanced glycation end product bovine seru. albumin （AGE-BSA） or 3% bovine seru. albumin （BSA） as a control. After mating mice, oxidative stress markers including malondialdehyde and H202 were measured at embryonic day 7.5 （E7.5） of ges- tation, and the level of intracellular reactive oxygen species （ROS） in embryonic cells was determined at E8.5. In addition to evaluating NTDs, an enzyme-linked immunosorbent assay was used to determine the effect of embryonic protein administration on the N-（carboxymethyl） lysine reactivity of acid and carboxyethyl lysine antibodies at E10.5. The results showed a remarkable increase in the incidence of NTDs at El0.5 in embryos of mice fed with AGE-BSA （no hyperglycemia） compared with control mice. Moreover, embryonic protein administration resulted in a noticeable increase in the reactivity of N-（carboxymethyl） lysine and N（ε）-（carboxyethyl） lysine antibodies. Malondialdehyde and H2O2 levels in embryonic cells were increased at E7.5, followed by increased intracellular ROS levels at E8.5. Vitamin E supplementation could partially recover these phenomena. Collectively, these results suggest that AGE-BSA could induce NTDs in the absence of hyperglycemia by an underlying mechanism that is at least partially associated with its capacity to increase embryonic oxidative stress levels.

关键词： nerve regeneration neural tube defects advanced glycation end products diabetic embryopathy oxidative stress N-(carboxymethyl)lysine malondiadehyde N(ε)-(carboxyethyl) lysine embryo H2O2 bovine seru. albumin neural regeneration

Single event transients induced by pulse laser in Ge pMOSFETs and its supply voltage dependence

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Science China(Information Sciences) 2022年第8期65卷 295-296页

作者： Jingyi liU Xia AN Gensong li Zhexuan REN Ming li Xing ZHANG ru.HUANG Institute of Microelectronics Peking University

Dear editor,Germanium(Ge) has been considered as a promising candidate of channel material for sub-7 nm owing to its high carrier mobility and good compatibility with conventional Si CMOS process [1]. Although Ge-based technology is still under development and not in massive production, it is quite meaningful to explore its single event effect(SEE) before potential space applications.

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Synthesis of Polyphosphonates Containing 5-Flouro-N^1-furanyl-N^3-glyceroalkyl-uracil and Formyl Groups

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Chinese Chemical Letters 2002年第1期13卷 29-32页

作者： li BAI ru.Yu CHEN Yuan Yuan ZHU Institute and National Key Laboratory of Elemento-Organic Chemistry Nankai UniversityTianjin 300071

A series of novel polyphosphonates containing 5-flouro- N1-furanyl-N3- glyceroalkyl-uracil and formyl groups was synthesized by the condensation of 3-(w- (1-furanyl-5-flourouracil-3-yl) alkoxy)-1, 2-dihydroxy propane with phosphonyl dichloride. The products were characterized by IR, 1H NMR, 31P NMR, M, and elemental analysis. The results of bioassay show that compound 8a possesses potential anticancer activity.

关键词： Polyphosphates furanyl,glyceryl 5-flourouracil formyl.