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Beyond-mean-field study of^(37)_(Λ)Ar based on the Skyrme-Hartree-Fock model

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Chinese Physics C 2022年第7期46卷 172-179页

作者： Ji-Wei Cui Ruizhe Wang xian-rong Zhou School of Physics Xidian UniversityXi'an 710071China FLEETCOR Technologies 3280Peachtree Rd SUITE 2400 AtlantaGA 30305USA Department of Physics ast China Normal UniversityShanghai 200241China

We present the hypernuclear states of^(37)_ΛAr obtained using the Skyrme-Hartree-Fock(SHF)model and a beyond-mean-field approach,including angular momentum projection(AMP)and the generator coordinate method(GCM).A comprehensive energy spectrum is given,which includes normally deformed(ND)and super deformed(SD)hypernuclear states with positive or negative *** levels corresponding to the configurations in which aΛhyperon occupies the s-,p-,or sd-shell orbitals are *** the s-shellΛ,we pay special attention to the ND and SD states corresponding to the configurations^(36)Ar^(N)\otimes s_Λand^(36)Ar^(S)otimes s_Λ,where^(36)Ar^(N)and^(36)Ar^(S)denote the ND and SD nuclear cores,*** disagreements between different models over theΛseparation energy of the SD state in previous studies are *** the p-shellΛ,four rotational bands are predicted,and the impurity effects are ***,two energy levels corresponding to the configurations^(36)Ar^otimesΛ[101](3)(2)^(-)and^(36)Ar^(S)otimesΛ[101](1)(2)^(-)are obtained below the separation threshold of^(36)Ar+Λwithin 0.5 *** the sd-shellΛ,three bound states are found near the separation threshold,and the mechanism behind these states are discussed.

关键词： Λhypernuclei Skyrme-Hartree-Fock model gamma transitions beyond-mean-field calculation

Pd nanoparticles immobilized on MIL-53(Al)as highly e ective bifunctional catalysts for oxidation of liquid methanol to methyl formate

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Petroleum Science 2019年第4期16卷 901-911页

作者： Jian-Fang Liu Jin-Cheng Mu rong-xian Qin Sheng-Fu Ji State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical Technology

A series of Pd/MIL-53(Al) heterogeneous bifunctional catalysts with di erent Pd contents were prepared by an impregnation method. The prepared metal–organic frameworks MIL-53(Al) and catalysts were characterized by XRD, SEM, HRTEM,FT-IR and N2 adsorption/desorption techniques. The results showed that MIL-53(Al) was synthesized successfully, and the structure was unchanged during and after the preparation of the catalysts. The Pd nanoparticles(NPs) with an average particle size of 4.6 nm were uniformly dispersed on the MIL-53(Al). The catalyst exhibited good catalytic activity in the selective oxidation of liquid methanol to methyl formate. Under the conditions of 150 °C, 2 MPa O2 and solvent-free for5 h, the conversion of methanol could reach 60.3%, and the selectivity of methyl formate was up to 62.2%. In addition, the Pd/MIL-53(Al) bifunctional catalyst exhibited excellent stability and maintained high catalytic activity after five cycles.

关键词： MIL-53(Al) Pd Bifunctional catalyst Methanol Methyl formate

Syntheses and Bioactivities of 4-Ar-2-oxo-glutaric Acids

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Chemical Research in Chinese Universities 2007年第3期23卷 284-288页

作者： CHEN Qiu-yun ZHANG rong-xian LIU Qing-shan Schofield Christopher Institute of Chemistry and Engineering Jiangsu University Zhenjiang 212013 P. R. China CRL University of Oxford South Parks Road Oxford OX1 3QY UK

Fourteen novel compounds were synthesized and characterized by using NMR and ESI-MS methods. The bioactivities of the four novel 4-Ar-2-oxo-glutaric acids were studied by using the LC-MS method. The experimental results show that 3-nitrobenzyl-2-oxo-glutaric acid is a mild inhibitor for the hydroxylation reaction catalyzed by PHD2. The decarboxylated peak for 3-fluorobenzyl-2-oxo-glutaric acid was observed by using the negative LC-MS method, indicating that it can be used as a mild cosubstrate to replace 2-OG, but this is possible only in the presence of the prime peptide CODD 19 mer.

关键词： 2-Oxo-glutaric acid Bioactivity Inhibitor Synthesis

Synthesis and properties of polyfluorene copolymers bearing thiophene and porphyrin

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Chinese Chemical Letters 2007年第7期18卷 879-882页

作者： Xing Xu Hao Chen xian rong Cai Ying Li Qing Jiang College of Chemistry Sichuan University Chengdu 610064 China

To search for more wider absorption and higher charge carriers mobilities materials of polymer solar cell, a series of soluble alternating polyfluorene copolymers were synthesized by palladium-catalyzed Suzuki coupling reaction. Their structures were determined by 1H NMR, IR and UV-vis. And their UV-vis absorption spectra indicated that they had strong absorption over 600 nm spectral range and nearly cover 400-700 nm visible region. The band gaps of copolymers calculated according to cyclic voltammetry （CV） were between 1.96 and 2.03 eV. Polymer：TiO2 bulk-heterojunction films were made from mixtures of polymer and titanium isopropoxide, a precursor for TiO2, via hydrolysis in air overnight. The photoluminescence at 380-800 nm of the blend film of PT-TPP20 （5 mg/mL）：Ti（OC3H7）4 （80 μL/mL）（20% volume fraction） was significantly quenched in the 50% Ti（OC3H7）4 blend film, indicating that rapid and efficient separation of photoinduced electron-hole pairs.

关键词： Polyfluorene copolymers Synthesis Absorption Bulk-heterojunction

Step-stress accelerated degradation test planning based on Wiener processwith correlation

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Statistical Theory and Related Fields 2018年第1期2卷 58-67页

作者： Lei He rong-xian Yue Daojiang He Department of Mathematics Shanghai Normal UniversityShanghai 200234China Scientific Computing Key Laboratory of Shanghai Universities Shanghai 200234China Department of Statistics Anhui Normal UniversityWuhuPeople’s Republic of China

To assess the lifetime distribution of highly reliable or expensive product,one of the most commonly used strategies is to construct step-stress accelerated degradation test(SSADT)which can curtail the test duration and reduce the test *** reality,it is not unusual for a unit with a higher degradation rate which exhibits a more volatile degradation ***,Ye,Chen,and Shen[(2015).A new class of Wiener process models for degradation *** Engineering and System Safety,139,58–67]proposed a Wiener process to capture the positive correlation between the drift rate and the *** this paper,an optimal SSADT plan is developed under the assumption that the underlying degradation path follows the Wiener process with ***,the stochastic diffusion process is introduced to model a typical SSADT *** the design variables,including the sample size,the measurement frequency and the numbers of measurements under each stress level,are optimised by minimising the asymptotic variance of the estimated p-percentile of the product’s lifetime distribution subject to the total experimental cost not exceeding a pre-specified ***,a numerical example is presented to illustrate the proposed method.

关键词： Step-stress accelerated degradation test Wiener process correlation optimal test plan

Reinforcing effects of modified Kevlar~ fiber on the mechanical properties of wood-flour/polypropylene composites

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Journal of Forestry Research 2013年第1期24卷 149-153页

作者： YUAN Fei-pin OU rong-xian XIE Yan-jun WANG Qing-wen Key Laboratory of Bio-Based Material Science and Technology (Ministry of Education) Northeast Forestry University

Kevlar fiber （KF） is a synthesized product with strong mechanical properties. We used KF as a reinforcement to improve the mechanical properties of wood-flour/polypropylene （WF/PP） composites. KF was pretreated with NaOH to improve its compatibility with the thermoplastic matrix. Maleated polypropylene （MAPP） was used as a coupling agent to improve the interfacial adhesion between KF, WF, and PP. Incorporation of KF improved the mechanical properties of WF/PP composites. Treatment of KF with NaOH resulted in further improvement in mechanical strength. Addition of 3% MAPP and 2% hydrolyzed KF （HKF） led to an increment of 93.8% in unnotched impact strength, 17.7% in notched impact strength, 86.8% in flexure strength, 50.8% in flexure modulus, and 94.1% in tensile strength compared to traditional WF/PP composites. Scanning electron microscopy of the cryo-fractured section of WF/PP showed that the HKF surface was rougher than the virgin KF, and the KF was randomly distributed in the composites, which might cause a mechanical interlocking between KF and polypropylene molecules in the composites.

关键词： Wood flour/Polypropylene composite Kevlar fiber hydrolysis reinforcement impact strength

The Lapinized Chinese Strain Vaccine Against Classical Swine Fever Virus:A Retrospective Review Spanning Half A Century

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Agricultural Sciences in China 2006年第1期5卷 1-14页

作者： QIU Hua-ji SHEN rong-xian TONG Guang-zhi National Key Laboratory of Veterinary Biotechnology Harbin Veterinary Research Institute Chinese Academy of Agricultural Sciences Harbin 150001 P.R.China

Classical swine fever （CSF）, a list A disease of Office International des Epizooties, is caused by classical swine fever virus （CSFV） belonging to the Flaviviridae family. The well-known lapinized Chinese strain of CSFV, also known as C-strain, was developed in China in the mid-1950s. In the past half a century, the vaccine has been proved to be safe and immunogenic in pigs of essentially any age. It is of high efficacy, providing immunized animals with broad-spectrum, sometimes lifelong, protection, which is contributed by both cell-mediated immunity and humoral immunity, against essentially all genotypes or subgenotypes of the virus. The maternal antibodies derived from immunized sows can confer solid protection of their offspring from disease; however, they have been proved to inhibit the successful active immunization of C-strain vaccine. The complete genomes of C-strain and dozens of established or field strains have been sequenced and annotated. Recently, the reverse genetics system of C-strain has been developed, resulting in several C- strain-derived candidate marker vaccines. Many countries manage to control or even eradicate CSF with the aid of mass vaccination with C-strain. in spite of these efforts, the eradication of the disease worldwide remains a big challenge and needs to go a long way, and provably still resorts to genetically modified C-strain vaccine. The authors present an overview of the characteristics of the vaccine, which has stood the test of half a century.

关键词： classical swine fever classical swine fever virus C-strain vaccine

Recent advances in electrocatalytic generation of indole-derived radical cations and their applications in organic synthesis

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Chinese Chemical Letters 2024年第4期35卷 106-123页

作者： Wei Zhou Xi Chen Lin Lu xian-rong Song Mu-Jia Luo Qiang Xiao Key Laboratory of Organic Chemistry of Jiangxi Province Jiangxi Science&Technology Normal UniversityNanchang 330013China

Indole-derived radical cations, open-shell reactive species, display distinctive dual reactivity due to the carbon-centered radical and more electrophilic carbocation, which frequently appear in a variety of single electron oxidation reactions for synthesizing structurally diverse functionalized indoles and indolines. Electrocatalysis is considered as a synthetically attractive and environmentally friendly alternative for driving the single electron oxidation of indoles. Remarkable achievements in electrocatalytic indolederived radical cation-mediated indole functionalization have been realized so far. This review comprehensively summarizes the recent progresses in the applications of electrocatalytic indole radical cations,including C(sp~2)–H functionalization, dearomative 2,3-difunctionalization, and ring-opening reaction, emphasizing the vital single electron oxidation steps of indoles, the substrates scope and limitations, and the reaction mechanisms.

关键词： Electrocatalysis Indole radical cation C-H functionalizatin Dearomative 2 3-difunctionalization

The neuroprotective effects of oxygen therapy in Alzheimer’s disease:a narrative review

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Neural Regeneration Research 2023年第1期18卷 57-63页

作者： Cui Yang Qiu Yang Yang xiang xian-rong Zeng Jun Xiao Wei-Dong Le School of Medicine University of Electronic Science and Technology of ChinaChengduSichuan ProvinceChina Institute of Neurology Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan ProvinceChina Chinese Academy of Sciences Sichuan Translational Medicine Research Hospital ChengduSichuan ProvinceChina Department of Hyperbaric Oxygen Sichuan Provincial People’s HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan ProvinceChina Sichuan Provincial Center for Mental Health Sichuan Academy of Medical Sciences&Sichuan Provincial People’s HospitalChengduSichuan ProvinceChina

Alzheimer’s disease(AD)is a degenerative neurological disease that primarily affects the *** therapy is the main strategy for AD treatment,but current treatments suffer from poor efficacy and a number of side ***-drug therapy is attracting more attention and may be a better strategy for treatment of *** is one of the important factors that contribute to the pathogenesis of *** cellular processes synergistically promote hypoxia,including aging,hypertension,diabetes,hypoxia/obstructive sleep apnea,obesity,and traumatic brain *** evidence has shown that hypoxia may affect multiple pathological aspects of AD,such as amyloid-beta metabolism,tau phosphorylation,autophagy,neuroinflammation,oxidative stress,endoplasmic reticulum stress,and mitochondrial and synaptic *** targeting hypoxia may delay or mitigate the progression of *** studies have shown that oxygen therapy could improve the risk factors and clinical symptoms of *** evidence also suggests that oxygen therapy may improve many pathological aspects of AD including amyloid-beta metabolism,tau phosphorylation,neuroinflammation,neuronal apoptosis,oxidative stress,neurotrophic factors,mitochondrial function,cerebral blood volume,and protein *** this review,we summarized the effects of oxygen therapy on AD pathogenesis and the mechanisms underlying these *** expect that this review can benefit future clinical applications and therapy strategies on oxygen therapy for AD.

关键词： Alzheimer’s disease amyloid-beta metabolism clinical symptoms hypoxia neuroinflammation neuronal apoptosis oxygen therapy pathogenesis risk factor tau phosphorylation