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Defence Technology（防务技术） 2021年第4期17卷 1289-1295页

作者： jia-xing Song Tao Guo Miao Yao jia-lin Chen Wen Ding Feng-li Bei Xiao-nan Zhang Qin Yin Jun-yi Huang Chang-hao Li College of Field Engineering PLA Army Engineering UniversityNanjing210001China School of Chemical Engineering Nanjing University of Science and TechnologyNanjing210094China Tellhow Sci-Tech CO. LTD.Beijing100032China

Fluoropolymers get increasing attention in energetic materials application due to the high fluorine *** explore the effect of poly(vinylidene fluoride-co-hexafluoropropylene)(P(VDF-HFP))on Al/MnO_(2) nanothermite,the samples with different contents are prepared and characterized by SEM,TGDSC,XRD,and their ignition and combustion behavior are tested and *** results show that P(VDF-HFP)as an energetic binder can combine the nanothermite components together,even exist in the *** integrity of energetic materials has been *** analysis shows that the addition of P(VDF-HFP)greatly changes the thermal reaction processes,and the exothermic peaks appear early,but the utilization of fuel and oxidizer is not efficient from the XRD ***,the appropriate addition of P(VDF-HFP)can directly reduce the ignition energy threshold and increase the combustion time,which is necessary for the potential ignition charge *** possible reasons for above phenomena are discussed and *** research provides a reference for improvement of thermitebased ignition charge formulation.

关键词： Nanothermite Fluoropolymers Combustion Thermal analysis

Photoinduced Dehalocyclization to Access Oxindoles Using Formate as a Reductant

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Chinese Journal of Chemistry 2024年第11期42卷 1203-1208页

作者： Wei Ge jia-Xin Wang Ming-Chen Fu Yao Fu Hefei National Research Center for Physical Sciences at the Microscale iChEMCAS Key Laboratory of Urban Pollutant ConversionAnhui Province Key Laboratory of Biomass Clean EnergyUniversity of Science and Technology of ChinaHefeiAnhui230026 China Anhui Province Key Laboratory of Value-Added Catalytic Conversion and Reaction Engineering Hefei University of TechnologyHefeiAnhui230009 China

Herein,we report an efficient and practical protocol for the photoinduced dehalocyclization of ortho-halophenylacrylamides with formate by the engagement of a CO_(2) radical anion to access substituted *** method proceeds smoothly under mild conditions and exhibits a wide range of substrate as well as remarkable functional group compatibility.

关键词： Formate CO_(2)Radical ions Oxindole Photocatalysts Cyclization Organohalides

Effect of temperature and mating pair on tribological properties of DLC and GLC coatings under high pressure lubricated by MoDTC and ZDDP

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Friction 2021年第6期9卷 1390-1405页

作者： Kang LIU jia-jie KANG Guang-an ZHANG Zhi-bin LU Wen YUE School of Engineering and Technology China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Deep GeoDrilling Technology of Ministry of Natural Resources Beijing 100083China Zhengzhou Institute China University of Geosciences(Beijing)Zhengzhou 451283China State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China

Diamond-like carbon(DLC)and graphite-like carbon(GLC)coatings have good prospects for improving the surface properties of engine ***,further understanding is needed on the effect of working conditions on tribological *** this study,GLC and two types of DLC coatings were deposited on GCr15 substrate for *** friction and wear properties of self-mated and steel-mated pairs were *** temperatures(25 and 90℃),three lubrication conditions(base oil,molybdenum dithiocarbamate(MoDTC)-containing oil,MoDTC+zinc dialkyldithiophosphate(ZDDP)-containing oil),and high Hertz contact stress(2.41 GPa)were applied in the *** results showed that high temperature promoted the effect of ZDDP on steel-mated pairs,but increased wear under base oil *** increased wear for steel-mated pairs lubricated by MoDTC-containing oil was due to abrasive wear probably caused by MoO_(3) andβ-FeMoO_(4).It was also found that in most cases,the tribological properties of self-mated pairs were better than those of steel-mated pairs.

关键词： diamond-like carbon(DLC) graphite-like carbon(GLC) mating pair temperature oil additives

Bio-inspired smart surface to achieve controllable locomotion through adjustable anisotropic friction

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Friction 2022年第8期10卷 1180-1191页

作者： Zhongying JI Shiyu QIN Shuanhong MA Xin jia Xiaolong WANG Feng ZHOU State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China School of Chemistry and Chemical Engineering Shihezi UniversityShihezi 832003China

Anisotropic friction generated by microstructured surfaces is crucial for performing functions such as directional locomotion and adhesion in biological ***,an epoxy-based shape memory polymer(SMP)incorporating Fe_(3)O_(4) nanoparticles is used in this study to create a smart surface with oriented structures to mimic anisotropic friction and exploit human-developed controllable locomotion *** the specific properties of the epoxy-based SMP,fast switching friction can be achieved by adjusting the topography and stiffness of the microstructures on the *** addition,the photothermogenesis effect of Fe_(3)O_(4) nanoparticles induces changes in the asymmetric topography and stiffness on the SMP surface under the irradiation of near-infrared(NIR)light,thereby inducing a rapid switching of the friction ***,a microbot is created to demonstrate remotely controlled locomotion,such as unidirectional and round-trip movements,and braking by switching the friction force under NIR *** results are promising for the design of new intelligent surfaces and interfaces;additionally,they may facilitate the investigation of biological structures and processes.

关键词： friction smart surface shape memory polymer(SMP) remote control

Research on the architecture of submarine-fan lobes in the Niger Delta Basin,offshore West Africa

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Journal of Palaeogeography 2016年第3期5卷 185-204页

作者： jia-jia Zhang Sheng-He Wu Ting-En Fan Hong-Jun Fan Li jiang Cheng Chen Qiong-Yuan Wu Peng Lin State Key Laboratory of Petroleum Resources and Prospecting College of GeosciencesChina University of Petroleum(Beijing) Research Institute China National Offshore Oil Corporation

As one of the most important reservoirs in submarine fan, submarine lobes are hot fields for the deep-water oil-gas exploration in the world. Although a large amount of researches have been carried out on the architecture model of submarine lobes throughout the world, some controversies still exist on aspects such as the differential distribution of composite patterns and the quantitative relationships among different sedimentary settings. This paper, which took an oilfietd in the Niger Delta Basin offshore West Afnca as an example and utilized abundant core, welt-logging and seismic data comprehensively, established the semi- quantitative to quantitative architecture model for individual lobe and lobe complex. Results show that （1） A lobe complex was composed of multiple individual lobes as the compensational stacking pattern. According to the stacked relationship among individual lobes, four types of compensational stacking pattern were classified as the inordered type, the lateral migration type, the retrograding type and the prograding type. Influenced by the laterally confined degree of palaeotopography, the basin floor fan lobe complex was easily superimposed as inordered type, showing relatively large lateral width but relatively small thickness; the slope fan lobe complex was easily superimposed as lateral migration, retrograding and pro- grading types, showing relatively small lateral width but relatively large thickness. （2） Influenced by the laterally confined degree of palaeotopography, the basin floor fan individual lobes showed relatively large planar distribution area but relatively small thickness, while the slope fan individual lobes showed relatively small planar distribution area but relatively large thickness. An individual lobe was composed of multiple lobe stories by the way of aggradation-progradation pattern. From proximal to middle and distal part of individual lobes, the bottom mass-transport-deposits and the top branch channels disappeare

关键词： Submarine lobes Composite pattern Quantitative scale Niger Delta Basin West Africa

PaPYL9 is involved in the regulation of apricot fruit ripening through ABA signaling pathway

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Horticultural Plant Journal 2022年第4期8卷 461-473页

作者： Mengxiao jia Jing Feng Lina Zhang Shikui Zhang Wanpeng Xi College of Horticulture and Landscape Architecture Southwest UniversityChongqing 400716China Agriculture National Fruit Tree Germplasm Repository Xinjiang Academy ofAgricultural SciencesLuntaiXinjiang 841600China Key Laboratory of Horticulture Science for Southern Mountainous Regions Ministry of EducationChongqing 400715China

Abscisic acid(ABA)is a major regulator of non-climacteric fruit ripening;however,the role of ABA in the ripening of climacteric fruit is not ***,as a typical climacteric fruit,apricots were used to investigate the role of ABA in fruit *** on weighted gene coexpression network analysis(WGCNA)of our previous transcriptome data,we treated‘Danxing’fruit with exogenous ABA and obtained ABA receptor genes,genes related to ABA biosynthesis and signal transduction,and analyzed the response of these candidate genes to exogenous ABA during fruit ***,the full length of candidate PYLs genes were cloned,and their putative function were analyzed by phylogenetic analysis and protein structure domain *** then the function of one candidate gene PaPYL9 was verified by using transgenic ***,the response genes in transgenic tomato were screened by transcriptome sequencing,and ultimately the related regulatory network was *** results showed that the injection of exogenous 1.89 mmol·L^(-1) ABA remarkably promoted fruit coloration,and increased the color index for red grapes(CIRG)and the total soluble solids(TSS)content,but significantly decreased the firmness and titratable acid(TA)content(ple in TA,TSS,CIRG and firmness,during the ripening *** NCED(9-cis-epoxycarotenoiddioxygenase)and five ABA receptor genes related to signal transduction were mined from the transcriptome data of apricot fruit through *** with the control,the expression levels of NCED1,PYL9(PYR/PYL/RCAR),SnRK2(SUCROSE NON-FERMENTING1(SNF1)-RELATED PROTEIN KINASE 2S),and ABF2(ABRE-binding bZIP transcription)were induced dramatically by ABA treatment(ple NDGA treatment significantly inhibited their *** on gene expression and protein domain analysis,we inferred that PaPYL9 is putatively involved in apricot fruit ***

关键词： Apricot PYLs Abscisic acid Ethylene Fruit ripening

Special John-Nirenberg-Campanato spaces via congruent cubes

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Science China Mathematics 2022年第2期65卷 359-420页

作者： Hongchao jia Jin Tao Dachun Yang Wen Yuan Yangyang Zhang Laboratory of Mathematics and Complex Systems(Ministry of Education of China) School of Mathematical SciencesBeijing Normal UniversityBeijing 100875China

let p ∈ [1, ∞), q ∈ [1, ∞), α∈ R, and s be a non-negative integer. Inspired by the space JNp introduced by John and Nirenberg(1961) and the space B introduced by Bourgain et al.(2015), we introduce a special John-Nirenberg-Campanato space JN^(con)_((p,q,s)) over R^(n) or a given cube of R;with finite side length via congruent subcubes, which are of some amalgam features. The limit space of such spaces as p →∞ is just the Campanato space which coincides with the space BMO(the space of functions with bounded mean oscillations)when α = 0. Moreover, a vanishing subspace of this new space is introduced, and its equivalent characterization is established as well, which is a counterpart of the known characterization for the classical space VMO(the space of functions with vanishing mean oscillations) over R^(n) or a given cube of R^(n) with finite side ***, some VMO-H^(1)-BMO-type results for this new space are also obtained, which are based on the aforementioned vanishing subspaces and the Hardy-type space defined via congruent cubes in this article. The geometrical properties of both the Euclidean space via its dyadic system and congruent cubes play a key role in the proofs of all these results.

关键词： John-Nirenberg space congruent cube amalgam Campanato space Hardy-type space duality vanishing subspace BMO

The effects of electrical heating and additives on the microbial remediation of petroleum-contaminated soils

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Journal of Forestry Research 2021年第6期32卷 2609-2618页

作者： Hongbai jia Yu Zhang Guocai Zhang Li Zou Bowen Zhang School of Life Science Northeast Forestry UniversityHarbin 150040People’s Republic of China School of Forestry Northeast Forestry UniversityHarbin 150040People’s Republic of China School of Information and Computer Engineering Northeast Forestry UniversityHarbin 150040People’s Republic of China

Although petroleum is an important source of energy and an economic driver of growth,it is also a major soil pollutant that has destroyed large swathes of vegetation and forest ***,it is vital to develop affordable and efficient methods for the bioremediation of petroleum-contaminated forest soils to restore vegetation and improve tree survival *** this study,bioremediation experiments were performed in an electrically heated thermostatic reactor to test the effects of organic matter additives,surfactants,and oxygen providers of nine hydrocarbon-degrading fungal strains on crude oil removal *** the three soil temperatures tested(20℃,25℃,and 30℃),the highest average crude oil removal rate was at 25℃(74.8%)and the lowest at 30℃(49.4%).At each temperature,variations in the addition of organic matter and oxygen providers had significant effects on crude oil removal *** in surfactant addition was significant at 20℃ and 25℃ but insignificant at 30℃.Given the same surfactant treatment,variations in temperature,organic additives,and oxygen providers was significant for crude oil removal *** without surfactants and treatments with Tween80 exhibited their highest crude oil removal rates at 25℃.However,treatments that included the SDS surfactant exhibited their highest crude oil removal rates at 30℃.Amongst the treatments without surfactants,treatments with corn cob addition had the highest crude oil removal rates,and with surfactants,treatments that included the organic fertilizer exhibited the highest crude oil removal *** the same organic fertilizer treatment,the highest crude oil removal rate was at 25℃.At each level of oxygen availability,the maximum crude oil removal rate always occurred at 25℃,and the treatments that included organic fertilizer exhibited the highest crude oil removal *** the treatments without oxygen providers,treatments without surfactants had the highest crude oil removal rates,and with a

关键词： Bioremediation Petroleum-contaminated soil Hydrocarbon-degrading fungi Crude oil removal rate Influencing factors

Regulation of pepc gene expression in Anabaena sp. PCC 7120 and its effects on cyclic electron flow around photosystem I and tolerances to environmental stresses

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Journal of Integrative Plant Biology 2015年第5期57卷 468-476页

作者： Xiao-Hui jia Peng-Peng Zhang Ding-Ji Shi Hua-Ling Mi jia-Cheng Zhu Xi-Wen Huang Pei-Min He Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Shanghai Ocean UniversityMinistry of Education Shanghai Department of Biological Sciences Louisiana State University Institute of Botany the Chinese Academy of Sciences National Key Laboratory of Plant Molecular Genetics Institute of Plant Physiology and EcologyShanghai Institutes for Biological Sciencesthe Chinese Academy of Sciences

Since pepc gene encoding phosphoenolpyruvate carboxylase （PEPCase） has been cloned from Anabaena sp. PCC 7120 and other cyanobacteria, the effects of pepc gene expression on photosynthesis have not been reported yet. In this study, we constructed mutants containing either upregu-lated （forward） or downregulated （reverse） pepc gene in Anabaena sp. PCC 7120. Results from real‐time quantitative polymerase chain reaction （RT‐qPCR）, Western blot and enzymatic analysis showed that PEPCase activity was signifi-cantly reduced in the reverse mutant compared with the wild type, and that of the forward mutant was obviously increased. Interestingly, the net photosynthesis in both the reverse mutant and the forward mutant were higher than that of the wild type, but dark respiration was decreased only in the reverse mutant. The absorbance changes of P700 upon saturation pulse showed the photosystem I （PSI） activity was inhibited, as reflected by Y（I）, and Y（NA） was elevated, and＆amp;nbsp;dark reduction of P700t was stimulated, indicating enhanced cyclic electron flow （CEF） around PSI in the reverse mutant. Additional y, the reverse mutant photosynthesis was higher than that of the wild type in low temperature, low and high pH, and high salinity, and this implies increased tolerance in the reverse mutant through downregulated pepc gene.

关键词： Anabaena sp. PCC 7120 cyclic electron flow pepc gene photosynthesis tolerance

Morphological and phylogenetic diversity of magnetotactic bacteria and multicellular magnetotactic prokaryotes from a mangrove ecosystem in the Sanya River,South China

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Journal of Oceanology and Limnology 2021年第6期39卷 2015-2026页

作者： Haitao CHEN Jinhua LI Long-Fei WU Wei-jia ZHANG Beijing Key Laboratory of Biological Electromagnetism Institute of Electrical EngineeringChinese Academy of SciencesBeijing 100190China France-China Joint Laboratory for Evolution and Development of Magnetotactic Multicellular Organisms Chinese Academy of SciencesBeijing 100029China Deep-Sea Microbial Cell Biology Department of Deep Sea SciencesInstitute of Deep-Sea Science and EngineeringChinese Academy of SciencesSanya 572000China Key Laboratory of Earth and Planetary Physics Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China LCB Aix Marseille UniversityCNRSMarseille 13402France

Magnetotactic bacteria(MTB)are morphologically and phylogenetically diverse prokaryotes commonly able to produce magnetic nanocrystals within intracellular membrane-bound organelles(i.e.,magnetosomes)and to swim along geomagnetic field *** studied the diversity of MTB in the samples collected from a mangrove area in the Sanya River,Hainan,South China,using microscopic and microbial phylogenetic *** of microanalysis and observation in microscopy and energy dispersive X-ray spectroscopy(EDXS)reveal a highly morphological diversity of MTB including unicellular cocci,vibrios,rod-shaped bacteria,and three morphotypes of multicellular magnetotactic prokaryotes(MMPs).In addition,analysis of the 16S rRNA gene showed that these MTB were clustered into 16 operational taxonomic units affi liated to the Alpha-,Delta-,and Gamma-proteobacteria classes within the Proteobacteria ***,by using the coupled fluorescence and transmission electron microscopy analysis,rodshaped bacteria,vibrio,and cocci were phylogenetically and structurally identified at the single-cell *** study demonstrated highly diverse MTB communities in the mangrove ecosystem and provide a new insight into the overall diversity of MTB.

关键词： magnetotactic bacteria diversity magnetosome phylogenetic analysis coordinated fl uorescence in-situ hybridization transmission electron microscopy(FISH-TEM) mangrove