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Communications in Theoretical Physics 2022年第3期74卷 36-43页

作者： Chao yu yin Li Jianzhi Ding yun Mao ying guo School of Computer Science and Engineering Central South UniversityChangsha 410083China School of Automation Central South UniversityChangsha 410075China School of Computer Science Beijing University of Posts and TelecommunicationsBeijing 100876China

We propose a discrete-modulated continuous-variable measurement-device-independent quantum key distribution protocol over a fiber-to-water *** from optical fibers,the underwater channel has more severe optical attenuation because of optical absorption and scattering,which reduces the maximum communication *** enhance the performance of the protocol,the photon subtraction operation is implemented at the modulator *** carry out a performance simulation in two different kinds of seawater channel,and the result shows that the scheme with photon subtraction has a longer secure communication distance under certain conditions.

关键词： measurement-device-independent discrete modulation fiber-to-water channel continuous variable quantum key distribution

Houttuynia cordata polysaccharide alleviated intestinal injury and modulated intestinal microbiota in H1N1 virus infected mice

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Chinese Journal of Natural Medicines 2019年第3期17卷 187-197页

作者： CHEN Mei-yu LI hong LU Xiao-Xiao LING Li-Jun WENG hong-Bo SUN Wei CHEN Dao-Feng ZHANG yun-yi Department of Pharmacology School of Pharmacy Fudan University Department of Pharmacognosy School of Pharmacy Fudan University

Houttuynia cordata polysaccharide(HCP) is extracted from Houttuynia cordata, a key traditional Chinese medicine. The study was to investigate the effects of HCP on intestinal barrier and microbiota in H1N1 virus infected mice. Mice were infected with H1N1 virus and orally administrated HCP at a dosage of 40 mg×kg^(–1)×d^(–1). H1N1 infection caused pulmonary and intestinal injury and gut microbiota imbalance. HCP significantly suppressed the expression of hypoxia inducible factor-1α and decreased mucosubstances in goblet cells, but restored the level of zonula occludens-1 in intestine. HCP also reversed the composition change of intestinal microbiota caused by H1N1 infection, with significantly reduced relative abundances of Vibrio and Bacillus, the pathogenic bacterial genera. Furthermore, HCP rebalanced the gut microbiota and restored the intestinal homeostasis to some degree. The inhibition of inflammation was associated with the reduced level of Toll-like receptors and interleukin-1β in intestine, as well as the increased production of interleukin-10. Oral administration of HCP alleviated lung injury and intestinal dysfunction caused by H1N1 infection. HCP may gain systemic treatment by local acting on intestine and microbiota. This study proved the high-value application of HCP.

关键词： H1N1 influenza virus Houttuynia cordata Inflammation Intestinal Barrier Microbiota Polysaccharide

Effect of magnetic field distribution on ECR ion source discharge

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Nuclear Science and Techniques 2018年第9期29卷 157-164页

作者： yu-guo Liu Jian-Lin Ke Guang-yi Zhao Ben-Chao Lou Yong-hong Hu Rong Liu Institute of Nuclear Physics and Chemistry CAEP

An electron cyclotron resonance ion source model that uses a coaxial antenna to inject the RF power was simulated, and the corresponding hydrogen plasma densities of the ion source were calculated at different magnetic field distributions via a fluid model. The results show that most of the microwave power is absorbed around the resonance surface near the antenna when the plasma density is below the cutoff density of 7.4 × 10^(16) m^(-3) for 2.45 GHz microwaves, and the simulation results also show that the plasma density is strongly influenced by the position and shape of the resonance surface, where a larger resonance surface would improve the plasma density.

关键词： ECR ion source Magnetic field distribution Plasma simulation

Herbicidal activity of Aureobasidium pullulans PA-2 on weeds and optimization of its solid-state fermentation conditions

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Journal of Integrative Agriculture 2020年第1期19卷 173-182页

作者： guo Qing-yun CHENG Liang ZHU Hai-xia LI Wei WEI You-hai CHEN hong-yu guo Liang-zhi WENG Hua WANG Jian Academy of Agriculture and Forestry Sciences Qinghai UniversityXining 810016P.R.China Key Laboratory of Agricultural Integrated Pest Management in Qinghai Province Xining 810016P.R.China Scientific Observing and Experimental Station of Crop Pests in Xining Ministry of Agriculture and Rural AffairsXining 810016P.R.China State Key Laboratory of Plateau Ecology and Agriculture Qinghai UniversityXining 810016P.R.China

Fungal strain PA-2 was isolated from infected poplar leaves from the Ping’an District, Haidong City of Qinghai Province, China. Based on the culture characteristics and the internal transcribed spacer(ITS) sequence of its 16S r DNA, the strain was identified as Aureobasidium pullulans. The culture and metabolites of strain PA-2 showed high herbicidal potential to five tested weeds Galium aparine var. tenerum, Chenopodium album, Malva crispa, Polygonum lapathifolium and Avena fatua. For the in vitro test, 5 days after the detached leaves were inoculated with PA-2 culture, all leaves infected by the hyphae and became black and rotten. For the in vivo test, a metabolite filtrate of PA-2 culture was sprayed over the living weed plants, and five days after inoculation, the weed plants became withered and necrotic. Seven days after inoculation, the fresh weight reductions of G. aparine var. tenerum, C. album, M. crispa, P. lapathifolium and A. fatua were 87.25, 78.46, 82.25, 62.11, and 80.27%, respectively. Galium aparine var. tenerum and M. crispa exhibited significant reductions in fresh weight. The bio-safety test on the five crops showed no significant plant height reductions, which was also observed for wheat(Triticum aestivum), faba bean(Vicia faba), and barley(Hordeum vulgare). By contrast, oilseed rape(Brassica napus) and pea(Pisum sativum) exhibited light spots but no significant reductions in plant height. These results indicated that A. pullulans could be a potential microbial herbicide for the control of the target weeds in crops. Optimization of the carbon and nitrogen sources for cultural media and substances for solid-state fermentation indicated that PA-2 had better colony growth and spore production with the optimal carbon source of glucose(C4), nitrogen source of soybean flour(N2), and the optimal substance was wheat bran. The results in this study provide useful information for the development ofA. pulluans PA-2 as an herbicide for bio-control of the we

关键词： A.pullulans weeds biological control crop safety optimum media condition

Compressive Strength of Basic Magnesium Sulfate Cement Coral Aggregate Concrete(MCAC)on Non-Destructive Testing

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Journal of Wuhan University of Technology(Materials Science) 2023年第5期38卷 1086-1095页

作者： guo Jianbo yu hongfa MA Haiyan CHANG yun MEI Qiquan ZHANG Yan Department of Civil and Airport Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China School of Architectural Engineering Nanjing University of EngineeringNanjing 210009China

Basic magnesium sulfate cement coral aggregate concrete(MCAC)is a new type of concrete consisting of basic magnesium sulfate cement,coarse coral aggregate,coral reef sand and *** rebound hammer(RH),the ultrasonic pulse velocity(UPV)and the compressive strength(fcu)tests of 14 sets of cube specimens of the MCAC after 28 d of aging were *** impact of the content and length of sisal fiber on the relationship between the fcu-RH and the fcu-UPV was determined.A mathematical model was established to predict the strength of the MCAC using the UPV,RH,and comprehensive UPV/RH methods and to obtain the curves of test *** applicability of the test strength curves of ordinary portland concrete(OPC),light-weight aggregate concrete(LAC),and coral aggregate concrete(CAC)to MCAC was *** results showed that the test strength curves of OPC,LAC and CAC were inappropriate to determine the strength of MCAC using non-destructive *** relative standard error of the curves of test strength of the RH method and the comprehensive method met the specifications,whereas that of the UPV method did not.

关键词： non-destructive testing basic magnesium sulfate cement coral aggregate corcrete ultrasonic pulse velocity rebound hammer specific test strength curves

Identification of four caspase genes from Spodoptera exigua (Lepidoptera: Noctuidae) and their regulations toward different apoptotic stimulations

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Insect Science 2020年第6期27卷 1158-1172页

作者： Huan yu Zi-Qi Li yi-yi Ou-Yang guo-Hua Huang Hunan Provincial Key Laboratory for Biology and Control of Plant Diseases and Insect Pests Hunan Agricultural UniversityChangshaChina College of Plant Protection Hunan Agricultural UniversityChangshaChina

Apoptosis plays critical roles in multiple biological processes in multicellular *** are known as important participators and regulators of ***,four novel caspase genes of Spodoptera exigua were cloned and characterized which were designated as SeCasp-1,SeCasp-6,ScCasp-7 and *** of the putative encoded protein sequences of these SeCasps indicated that SeCasp-1 and ScCasp-7 were possible homologs of executor caspases;SeCasp-8 was a possible homolog of initiator caspases;and SeCasp-6 was a unique caspase of *** that shares low similarity with all the identified insect *** on baculovirus expression system analyses,SeCasp-1 exhibited similar caspase activity to human caspase-1,-3,-4,-6,-8 and-9;SeCasp-6 presented similar caspase activity to human caspase-2,-3,-4,-6,-8 and-9;SeCasp-7 exhibited similar caspase activity to human caspase-2,-3 and-6;and SeCasp-8 presented similar caspase activity only to human *** with diiTcrent chemicals revealed that SeCasp-1 showed extreme upregulation after 24 h in the treated fat body cell line(IOZCAS-Spex-II)of *** expression analysis revealed that SeCasp-1 was highly transcribed in the larval stages,while SeCasp-6,SeCasp-7,SeCasp-H were *** in vivo detection of the relative expression levels of SeCasps in *** larvae inoculated with different pathogens suggested that SeCasp-J was sensitive to Bacillus thuringiensis infection and that SeCasp-6 was sensitive to baculovirus ***-7 and SeCasp-H showed slight changes under either in vitro chemical apoptosis induction or in vivo pathogen infection.

关键词： apoptosis apoptotic inducing insect caspase SeCasp Spodoptera exigua

A Novel Dihydroflavone from the Roots of Uvaria Macrophylla

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Chinese Chemical Letters 2002年第9期13卷 857-858页

作者： Si WANG Pei Cheng ZHANG Ruo yun CHEN ying hong WANG Wen yi HE De Quan yu Institute of Materia Medica Chinese Academy of Medical Sciences&Peking Union Medical CollegeBeijing 100050

A new dihydroflavone (1), named macrophyllol A, was isolated from the roots of Uvaria macrophylla. Its structure was elucidated on the basis of spectroscopic evidence.

关键词： Uvaria macrophylla macrophyllol A.

Overexpression of AmDUF1517 enhanced tolerance to salinity, drought, and cold stress in transgenic cotton

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Journal of Integrative Agriculture 2018年第10期17卷 2204-2214页

作者： HAO yu-qiong LU guo-qing WANG Li-hua WANG Chun-ling guo Hui-ming LI yi-fei CHENG hong-mei Biotechnology Research Institute Chinese Academy of Agricultural Sciences

As abiotic stresses become more severe as a result of global climate changes, the growth and development of plants are restricted. In the development of agricultural crops with greater stress tolerance, AmDUF1517 had been isolated from the highly stress-tolerant shrub Ammopiptanthus mongolicus, and can significantly enhance stress tolerance when inserted in Arabidopsis thaliana. In this study, we inserted this gene into cotton to analyze its potential for conferring stress tolerance. Two independent transgenic cotton lines were used. Southern blot analyses indicated that AmDUF1517 was integrated into the cotton genome. Physiological analysis demonstrated that AmD UF1517-transgenic cotton had stronger resistance than the control when treated with salt, drought, and cold stresses. Further analysis showed that trans-AmD UF1517 cotton displayed significantly higher antioxidant enzyme（superoxide dismutase（SOD）, peroxidase（POD）, catalase（CAT）, and glutathione S-transferase（GST）） activity and less reactive oxygen species（ROS） accumulation, which suggests that overexpression of AmDUF1517 can improve cotton resistance to stress by maintaining ROS homeostasis, as well as by alleviating cell membrane injury. These results imply that AmDUF1517 is a candidate gene in improving cotton resistance to abiotic stress.

关键词： transgenic cotton stress tolerance AmDUF1517 Ammopiptanthus mongolicus reactive oxygen species

Dimethylacetamide-promoted Direct Arylation Polycondensation of 6,6’-Dibromo-7,7’-diazaisoindigo and(E)-1,2-bis(3,4-difluorothien-2-yl)ethene toward High Molecular Weight n-Type Conjugated Polymers

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Chinese Journal of Polymer Science 2019年第11期37卷 1099-1104页

作者： Kai guo yu Jiang ying Sui yun-Feng Deng Yan-Hou Geng School of Materials Science and Engineering Tianjin University Tianjin 300072 China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 China Tianjin Key Laboratory of Molecular Optoelectronic Science Tianjin University and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin) Tianjin 300072 China

A highly efficient and eco-friendly protocol for the synthesis of an alternating copolymer poly(7,7'-diazaisoindigo-alt-(E)-1,2- bis(3,4-difluorothien-2-yl)ethene)(PAIID-4FTVT) via direct arylation polycondensation (DArP) is presented. Through detailed study, we found that the inhibitory effect of 7,7'-diazaisoindigo on DArP stemmed from the coordination of N atom with catalyst can be overcome by using dimethylacetamide (DMAc) as the co-solvent. Thus, PAIID-4FTVT with number-average molecular weight (Mn)>100kDa was synthesized via DArP by optimizing the content of DMAc. Matrix-assisted laser desorption ionization time-of-flight (MALDI-TOF) mass spectroscopy revealed that PAIID-4FTVT was defect-free. Top gate and bottom contact (TG/BC) organic thin-film transistors (OTFTs) were fabricated to characterize the semiconducting properties of the polymers. PAIID-4FTVT displayed unipolar n-type characteristics with the electron mobility (μe) strongly dependent on Mn. The highest μe up to 0.25 cm^2·V^-1 s^-1 was achieved with the high molecular weight sample.

关键词： Direct arylation polycondensation Conjugated polymer 7,7-Diazaisoindigo Organic thin-film transistor Electron mobility

3D T1-weighted black blood sequence at 3.0 Tesla for the diagnosis of cervical artery dissection

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Stroke & Vascular Neurology 2016年第3期1卷 140-146页

作者： yun Luo Zhen-Ni guo Peng-Peng Niu Yang Liu hong-Wei Zhou Hang Jin yi Yang Stroke Center Neuroscience CenterDepartment of NeurologyThe First Hospital of Jilin UniversityChangchunChina Department of Radiology The First Hospital of Jilin UniversityChangchunChina

Objective:We aimed to investigate the value of threedimensional(3D)T1 volumetric isotropic turbo spin echo acquisition(VISTA)in the diagnosis of cervical artery dissection(CAD).Methods:We prospectively included patients who were suspected as having a CAD within 1 month of *** T1 VISTA,the diagnosis of the dissection was based on the presence of intramural high-signal,intimal flap,double lumen and aneurysmal *** final diagnosis of dissection was based on the clinical history,physical examination,and all of the imaging ***:A total of 46 patients were included in this *** final diagnosis of CAD was made for 21 *** of dissection was made for 20 of the 21 patients after assessing T1 VISTA.A definitive diagnosis of dissection was not made for 5 patients(including 3 patients with digital subtraction angiography)before the T1 VISTA *** sensitivity and specificity for T1 VISTA were 95.2%(95%CI,76.2%to 99.9%)and 100%(95%CI,86.3%to 100%),*** agreement between the two researchers for T1 VISTA for diagnosis of CAD was very good(k=0.91).For patients without acute artery occlusion,all of them had a definite conclusion with or without dissection by T1 VISTA(n=29).However,for 17 patients with acute artery occlusion,the possibility of dissection could not be excluded for 6 of them by T1 VISTA(p=0.001).Conclusions:3D T1 VISTA at 3.0 Tesla was useful in the diagnosis of acute ***,for some patients with total occlusion of the artery without typical imaging features of dissection,the unequivocal distinction between intramural haematoma and intraluminal thrombus may be not adequate by T1 VISTA *** studies should investigate whether a follow-up scan,a contrast-enhanced imaging or an optimal VISTA technique could be useful.

关键词： diagnosis alone VISTA