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Ceria supported platinum catalyst for CO oxidation reaction:Importance of metallic active species——Commemorating the 100th anniversary of the birth of Academician Guangxian Xu

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Journal of Rare Earths 2021年第5期39卷 495-503页

作者： Luozhen Jiang Xin Tao li'na li Wen Xia Rui Si Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201204China University of Chinese Academy of Sciences Beijing 100049China Division of China TILON Group Technology LimitedShanghai 200090China

Ceria supported platinum catalyst has now been widely studied due to its excellent activity for CO oxidatio ***,the electron state of active metal center is still an open *** this work,a ce ria nanorod support was prepared and platinum(Pt)with 0.9 at%was deposited using an impregnation method to obtain Pt/CeO_(2)*** the help of"light-off"experiment and temperatureprogrammed reduction under CO(CO-TPR)test,the conclusion is proposed that the process of hydrogen reduction can enhance the activity of CO oxidation reaction for the generation of optimal active Pt *** innovative near-situ X-ray absorption fine structure(XAFS)technique was used to investigate the chemical state of central Pt atom during the reaction process,clearly demonstrating that the high oxidized state of Pt does harm to the activity for CO oxidation while the relatively reductive Pt exhibits high activity,and the different oxidized state and chemical environment of Pt during every process has been ***,the activity of our Pt/CeO_(2)catalyst is superior to that of most of the previous reports about CO catalytic oxidation by Pt based ***,the optimal active species(Pt-O_(4))have been identified after hydrogen reduction,which could be a possible key strategy to control the oxidation of Pt.

关键词： Platinum catalyst Ceria support CO oxidation Structure-activity relationship X-ray absorption fine structure Rare earths

Design, Syntheses and Biological Activities of Novel Anthranilic Diamide Insecticides Containing N-Pyridylpyrazole

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Chemical Research in Chinese Universities 2013年第1期29卷 51-56页

作者： ZHAO Yu li Yong-qiang XIONG li-xia XU li-ping PENG li-na li Fang li Zheng-ming national Pesticidal Engineering Centre(Tianjin) State Key Laboratory of Elemento-organic Chemistry Nankai University Tianjin 300071 P. R. China

In search of environmentally benign insecticides with high activity, low toxicity and low residue, a series of novel anthranilic diamide derivatives containing N-pyridylpyrazole was designed and synthesized. All the compounds were characterized by H NMR spectroscopy and elemental analysis. The single crystal structure of com pound 8j was determined by X-ray diffraction. The insecticidal activities of the new compounds were evaluated. The results show that some compounds exhibited moderate insecticidal activities against Lepidoptera pests. Among this series of compounds, compounds 80 and 8p showed 100% larvicidal activity against Mythimna separate Walker, Plutella xylostella linnaeus and Laphygma exigua Hubner at a test concentration of 200 mg/kg, which is equal to the commercial chlorantraniliprole.

关键词： Anthranilic diamide Ryanodine receptor Insecticidal activity

Combination of Geniposide and Eleutheroside B Exerts Antidepressant-like Effect on lipopolysaccharide-Induced Depression Mice Model

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Chinese Journal of Integrative Medicine 2021年第7期27卷 534-541页

作者： ZHANG Bo CHANG Hong-sheng HU Kai-li YU Xue li li-na XU Xiang-qing School of Chinese Materia Medica Beijing University of Chinese MedicineBeijing102488China School of Basic Medicine Science Beijing University of Chinese MedicineBeijing100102China Experiment Center Encephalopathy DepartmentAffiliated Hospital of Shandong University of Chinese MedicineJinan250014China

Objective To study the antidepressant-like effect and action mechanism of geniposide and eleutheroside B combination treatment on the lipopolysaccharide(LPS)-induced depression mice *** Depression mice model was established by lipopolysaccharide(LPS)*** 48 mice were randomly divided into 6 groups(8 rats per group)according to a random number table,including normal,model,fluoxetine(20 mg/kg),geniposide(100 mg/kg)+eleutheroside B(100 mg/kg),geniposide+eleutheroside B+WAY 100635(0.03 mg/kg),geniposide+eleutheroside B+N-methyl-D-aspartic acid receptor(NMDA,75 mg/kg)groups,*** continuous administration for 10 days,autonomic activity tests after 30 min of administration were performed on the 10th *** the 11th day,except for the normal group,the mice in the other groups were intraperitoneally injected with LPS(1 mg/kg),and the behavioral tests were performed 4 h *** linked immunosorbent assay was used to detect tumor necrosis factor alpha(TNF-α)and interleukin-1β(IL-1β)levels in mice *** mRna expression of indoleamine 2,3-dioxygenase(IDO)and nuclear transcription factor(NF-κB)were detected by real-time quantitative polymerase chain ***-blot analysis was used to detect IDO and NF-κB protein expressions in hippocampus *** Compared with the normal group,a single administration of LPS increased the immobility time in the forced swimming test(FST)and tail suspension test(TST,Plity time of depressed mice in the FST and TST,decreased serum IL-1βcontent,inhibited the expression levels of NF-κB gene and protein in hippocampus tissues(Pna and protein expressions in hippocampus(P<0.05 or P<0.01).In a

关键词： geniposide eleutheroside B antidepressant effect mechanism 5-hydroxytryptamine glutamate

Fe_(3)O_(4)@Angelica sinensis polysaccharide nanoparticles as an ultralow-toxicity contrast agent for magnetic resonance imaging

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Rare Metals 2021年第9期40卷 2486-2493页

作者： Kai Wang Xiao-Guang Xu Ying-li Ma Chun-Rui Sheng li-na li li-Ying Lu Jian Wang Yi-Ning Wang Yong Jiang School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Instrumentation Science and Optoelectronics Engineering Beihang UniversityBeijing 100191China School of Chinese Medicine Beijing University of Chinese MedicineBeijing 100029China School of Chemistry and Biological Engineering University of Science and Technology BeijingBeijing 100083China Department of Radiology Peking Union Medical College Hospital Chinese Academy of Medical SciencesBeijing 100730China

Although iron oxide(Fe_(3)O_(4)) nanoparticles have broad application prospects as magnetic resonance imaging(MRI) contrast agent, their biocompatibility and biotoxicity still need to be improved. In this study, we prepared Fe_(3)O_(4)@Angelica sinensis polysaccharide nanoparticles(Fe_(3)O_(4)@ASP NPs) with a 9 nm Fe_(3)O_(4) core and ASP as the coating material. The Fe_(3)O_(4)@ASP NPs are superparamagnetic, can be taken up by liver and spleen macrophages in the circulatory system in vivo, and are a good-biocompatibility and low-toxicity transverse relaxation time(T_(2)) and T_(2)-star(T_(2)^(*)) magnetic resonance imaging(MRI) contrast agent for the liver. The cytotoxicity assessment using HeLa cells and the pathological tests in mice validate that Fe_(3)O_(4)@ASP NPs have low toxicity and good biocompatibility in vivo, which can be attributed to the ASP as a natural polysaccharide with good biocompatibility and its function of protecting the liver. Fe_(3)O_(4)@ASP NPs are a potential new MRI contrast agent with high signal intensity in vivo.

关键词： Superparamagnetic nanoparticles Fe_(3)O_(4) Angelica sinensis polysaccharide Magnetic resonance imaging Ultralow toxicity

Structure design of lead-free chiral-polar perovskites for sensitive self-powered X-ray detection

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Chinese Journal of Structural Chemistry 2024年第6期43卷 34-39页

作者： Xin Dong Tianqi Chen Jing liang Lei Wang Huajie Wu Zhijin Xu Junhua Luo li-na li State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of MatterChinese Academy of SciencesFuzhou350002China Fujian Science&Technology Innovation Laboratory for Optoelectronic Information of China Fuzhou350108China University of the Chinese Academy of Sciences Beijing100039China

Metal halide perovskites have made significant progress in X-ray detection owing to their exceptional optoelec-tronic ***,most of these materials suffer from toxic element lead and require for high operating ***,it is imperative to explore environmentally friendly perovskite crystals without external bias for X-ray ***,we strategically introduce chiral cations to synthesize a pair of lead-free chiral-polar hybrid perovskites(S-MPz)_(6)Bi_(3)I_(21)·6H_(2)O and(R-MPz)_(6)Bi_(3)I_(21)·6H_(2)O(1S and 1R,S/R-MPz=S/R-2-methylpipera-zinium),which exhibit strong circular dichroism(CD)signals with an anisotropic g-factor reaching approximately ***,the chiral-polar feature gives rise to distinctive spontaneous polarization,which leads to a photovoltage of 1.1 V under X-ray illumination,endowing self-powered detection capabilities for *** exploration of X-ray devices based on 1R single crystal(SC)demonstrates a high sensitivity of 5.2 pC Gy_(air)^(-1)cm^(-2)at zero *** study realizes passive X-ray detection depending on the intrinsic spontaneous polarization induced built-in electric field of chiral-polar perovskite,providing an effective approach to the chemical design of desired materials for high-performance"green"self-powered radiation detection.

关键词： Lead-free perovskite Self-powered Chiral-polar X-ray detection

Identification of superior clones by RAPD technology in Xanthoceras sorbifolia Bge.

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Forestry Studies in China 2010年第1期12卷 37-40页

作者： GUAN li-ping YANG Ting li na li Bo-sheng LU Hai College of Biological Sciences and Biotechnology Beijing Forestry University Beijing 100083 E R. China

It is very important to select and identify superior Xanthoceras sorbifolia Bge. trees for purposes of breeding and exploration. For our study, we selected superior X. sorbifolia trees using RAPD （random amplification of polymorphic Dna） technology. The results show that certain specific amplification bands emerged with significantly different frequencies between superior and non-superior trees. The 1400-bp band of No. 2121 primer emerged in the superior trees at a frequency 2.4 times that of the non-superior trees and the 600-bp band of No. 2153 primer in the non-superior trees at a frequency 2.5 times that of the superior trees There were very significant differences between the superior and non-superior trees. The frequency of the 1600-bp band of No. 1161 primer was the same in both kinds of trees, but significant differences were observed in point frequency （the frequency of the superior trees is 1,4 times that of the non-superior trees）. These bands can be used as important targets to distinguish between superior and non-superior trees. The use of a combination of amplified bands simultaneously can play a guiding role in the selection of superior X. sorbifolia trees.

关键词： Xanthoceras sorbifolia Bge. superior clones RAPD technology

Gonioscopy and Ultrasound Biomicroscopy in the Detection of Angle Closure in Patients with Shallow Anterior Chamber

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Chinese Medical Sciences Journal 2014年第4期29卷 204-207页

作者： Shan-shan Cui Yan-hong Zou Qian li li-na li Ning Zhang Xi-pu liu Department of Ophthalmology First Hospital of Tsinghua University Medical Center Tsinghua University Department of Ophthalmology Sekwa Eye Hospital

Objective To assess the agreement between gonioscopy and ultrasound biomicroscopy(UBM) in detecting angle closure in Chinese patients with shallow anterior chamber. Methods An observational comparative study of the two different examination methods was conducted. Patients with normal intraocular pressure and temporal peripheral anterior chamber depth less than a quarter of corneal thickness based on slit lamp examination were included in this study from December 2007 to May 2009 in the outpatient clinic of First Hospital of Tsinghua University. Gonioscopy was performed with a Goldman goniolens in dark room first and followed by full beam light and indentation. If the filtering trabecular meshwork was invisible or any peripheral anterior synechia was found, that quadrant of the angle was considered closed. UBM was first undertaken in a darkened room then repeated with normal room lighting. If iridotrabecular apposition was showed, that quadrant of the angle was considered closed. The status of angle closure of each quadrant with different methods was recorded. Results 85 eyes of 46 patients were included in this study. The agreement between gonioscopy and UBM was poor(κnalysis in both dark and light conditions in each quadrant. The accordance of agreement between gonioscopy and UBM was hardly affected by age or sex, while in dark condition, eyes with deeper anterior chamber(P=0.005) or plateau iris configuration tended to produce different results(P=0.075) in the 2 methods. Conclusion Gonioscopy and UBM are both indispensable methods for detecting angle closure, neither can completely replace the other.

关键词： gonioscopy ultrasound biomicroscopy angle closure glaucoma

Chromosome painting of telomeric repeats reveals new evidence for genome evolution in peanut

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Journal of Integrative Agriculture 2016年第11期15卷 2488-2496页

作者： DU Pei li li-na ZHANG Zhong-xin liU Hua QIN li HUANG Bing-yan DONG Wen-zhao TANG Feng-shou QI Zeng-jun ZHANG Xin-you State Key Laboratory of Crop Genetics and Germplasm Enhancement Nanjing Agricultural University Industrial Crops Research Institute Henan Academy of Agricultural Sciences/Key Laboratory of Oil Crops in Huang-Huai-Hai PlainsMinistry of Agriculture/Henan Provincial Key Laboratory for Oil Crops Improvement College of Agriculture Henan University of Science and Technology

Interspecific hybridization is an important approach to improve cultivated peanut varieties. Cytological markers such as tandem repeats will facilitate alien gene introgression in peanut. Telomeric repeats have also been frequently used in chromosome research. Most plant telomeric repeats are（TTTAGGG）n that are mainly distributed at the chromosome ends, although interstitial telomeric repeats（ITRs） are also commonly identified. In this study, the telomeric repeat was chromosomally localized in 10 Arachis species through sequential GISH（genomic in situ hybridization） and FISH（fluorescence in situ hybridization） combined with 4＇,6-diamidino-2-phenylindole（DAPI） staining. Six ITRs were identified such as in the centromeric region of chromosome Bi5 in Arachis ipa？nsis, pericentromeric regions of chromosomes As5 in A. stenosperma, Bho7 in A. hoehnei and Av5 in A. villosa, nucleolar organizer regions of chromosomes As3 in A. stenosperma and Adi3 in A. diogoi, subtelomeric regions of chromosomes Bho9 in A. hoehnei and Adu7 in A. duranensis, and telomeric region of chromosome Es7 in A. stenophylla. The distributions of the telomeric repeat, 5S r Dna, 45 S r Dna and DAPI staining pattern provided not only ways of distinguishing different chromosomes, but also karyotypes with a higher resolution that could be used in evolutionary genome research. The distribution of telomeric repeats, 5S r Dna and 45 S r Dna sites in this study, along with inversions detected on the long arms of chromosomes Kb10 and Bho10, indicated frequent chromosomal rearrangements during evolution of Arachis species.

关键词： Arachis species inversion interstitial telomeric repeats karyotype

Development and characterization of new allohexaploid resistant to web blotch in peanut

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Journal of Integrative Agriculture 2021年第1期20卷 55-64页

作者： WANG Si-yu li li-na FU liu-yang liU Hua QIN li CUI Cai-hong MIAO li-juan ZHANG Zhong-xin GAO Wei DONG Wen-zhao HUANG Bing-yan ZHENG Zheng TANG Feng-shou ZHANG Xin-you DU Pei School of life Sciences Zhengzhou UniversityZhengzhou 450001P.R.China Industrial Crops Research Institute Henan Academy of Agricultural Sciences/Key Laboratory of Oil Crops in Huang-Huai-HaiPlainsMinistry of Agriculture and Rural Affairs/Henan Provincial Key Laboratory for Oil Crops ImprovementZhengzhou 450002P.R.China

Peanut diseases seriously threaten peanut production, creating disease-resistant materials via interspecific hybridization is an effective way to deal with this problem. In this study, the embryo of an interspecific F1 hybrid was obtained by crossing the Silihong(Slh) cultivar with Arachis duranensis(ZW55), a diploid wild species. Seedlings were generated by embryo rescue and tissue culture. A true interspecific hybrid was then confirmed by cytological methods and molecular markers. After treating seedlings with colchicine during in vitro multiplication, the established interspecific F1 hybrid produced seeds which were named as Am1210. With oligonucleotide fluorescence in situ hybridization(Oligo FISH), molecular marker evaluations, morphological and web blotch resistance characterization, we found that: 1) Am1210 was an allohexaploid between Slh and ZW55;2) the traits of spreading lateral branches, single-seeded or double-seeded pods and red seed coats were observed to be dominant compared to the erect type, multiple-seeded pods and brown seed coats;3) the web blotch resistance of Am1210 was significantly improved than that of Slh, indicating the contribution of the web blotch resistance from the wild parent A. duranensis. In addition, 69 dominant and co-dominant molecular markers were developed which could be both used to verify the hybrid in this study and to identify translocation or introgression lines with A. duranensis chromosome fragments in future studies as well.

关键词： peanut interspecific hybridization allohexaploid Oligo FISH molecular marker web blotch