检索结果-南通市图书馆

Convergence of a Non-interior Continuation Algorithm for the Monotone SCCP

同方期刊数据库博看期刊评论

在线全文

学校读者我要写书评

暂无评论

Acta Mathematicae Applicatae Sinica 2010年第4期26卷 543-556页

作者： Nan Lu zheng-hai Huang Department of Mathematics School of ScienceTianjin UniversityTianjin 300072China

It is well known that the symmetric cone complementarity problem（SCCP） is a broad class of optimization problems which contains many optimization problems as special *** on a general smoothing function,we propose in this paper a non-interior continuation algorithm for solving the monotone *** proposed algorithm solves at most one system of linear equations at each *** using the theory of Euclidean Jordan algebras,we show that the algorithm is globally linearly and locally quadratically convergent under suitable assumptions.

关键词： Symmetric cone complementarity problem non-interior continuation method global linear convergence local quadratic convergence

Facile preparation of hydrophilic glutathione modified magnetic nanomaterials for specific enrichment of glycopeptides

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2019年第12期30卷 2181-2185页

作者： He Qi zheng Li haijiao zheng Li Fu qiong Jia College of Chemistry Jilin UniversityChangchun 130012China The Second Hospital of Jilin University Changchun 130041China Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education School of Life SciencesJilin UniversityChangchun 130012China

Investigations of glycosylated proteins or peptides and their related biological pathways provide new possibilities for illuminating the physiological and pathological mechanisms of glycosylation ***,open-ended and in-depth analysis of glycoproteomics is usually subjected to the low-abundance of glycopeptides,heterogeneous glycans,and a variety of interference *** order to alleviate the influence of these obstacles,effective preconcentration of glycopeptides are ***,we employed a hydrophilic interaction liquid chromatography(HILIC)-based method to universally capture *** modified magnetic nanoparticles(Fe304@AuGSH) were synthesized through a simple process and exploited to enrich glycopeptides from complex *** prepared materials showed excellent ability to trap glycopeptides from standard glycoproteins digests,low detection limit(10 fmol/p L),and good selectivity(HRP:BSA=1:100).These results indicated that glutathione-based magnetic nanoparticles synthesized in this work had great potential for glycopeptides enrichment.

关键词： Hydrophilic Glutathione Magnetic Enrichment Glycopeptides

Effect of Particle Conductivity on Fe-Si Composite Electrodeposition

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2014年第5期30卷 811-816页

作者： LONG qiong ZHONG Yunbo zheng Tianxiang LIU Chunmei Shanghai Key Laboratory of Modern Metallurgy and Materials Processing Shanghai University Shanghai 200072 P R. China

Coatings containing Fe-Si or Si particles were electrodeposited on 3.0%（mass fraction） Si steel sheets. The surface morphology, the cross-section and the silicon content of coating have been investigated, respectively. It was found that the number of particles on the coating surface and cross-section significantly decreased with increasing silicon content in the applied particles, leading to a decrease of the silicon content of coatings. About 10.2% silicon content of coatings deposited with Fe-30%Si particles can be obtained, whereas that for Si particles was only 2.9% at a particle concentration of 100 g/L and current density of 2 A/dm2. This is mainly attributed to the conductivity of applied particles. High conductivity can promote the co-deposition of the particles. With increasing silicon content in the particles, their conductivity decreased sharply, resulting in the decrease of silicon content of coatings. Present work may initiate a new method to modify the particle content of the composite coatings via changing the conductivity of the particles during the composite electrodeposition. In this paper, a possible mechanism was proposed to explain the phenomena.

关键词： Composite electrodeposition Conductivity Fe-Si particle 6.5% Silicon steel

Light/pH dual-responsive magnetic metal-organic frameworks composites for phosphorylated peptide enrichment

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2024年第7期35卷 222-226页

作者： Rui Wang He Qi haijiao zheng qiong Jia College of Chemistry Jilin UniversityChangchun 130012China Key Laboratory for Molecular Enzymology and Engineering of Ministry of Education School of Life SciencesJilin UniversityChangchun 130012China

Metal-organic frameworks(MOFs)combined with specific ligands are highly adaptable smart materials that can respond to external and physiological *** this study,we introduced a pyridinyl zwitterionic ligand with light/pH dual response into magnetic MOF composite(Fe_(3)O_(4)@ZW-MOF)for enrichment of phosphorylated peptides for the first *** introduction of the developed ligand gives MOF material dual response *** stimulation affects the generation/disappearance of free radicals of the pyridine derivative,resulting in a change in the charge gradient of the zwitterion,and zwitterion can also regulate the p H of the solution by adding acid or ***,the reversible capture and release of phosphorylated peptides can be easily achieved by adjusting light and *** established phosphorylated peptide enrichment platform exhibits high sensitivity(detection limit of 1 fmol),high selectivity(β-casein:BSA,1:1000),and good reusability(7 cycles).In addition,the method was applied to the enrichment of phosphorylated peptides in complex systems(non-fat milk and human serum),demonstrating the feasibility of this method for phosphoproteom *** conclusion,the synthesized Fe_(3)O_(4)@ZW-MOF is a promising MOF material,which provides the possibility to advance the application of responsive MOFs materials in proteomics.

关键词： Light pH Dual-response Metal-organic frameworks Phosphorylated peptide

Mathematical analysis of SOFC based on co-ionic conducting electrolyte

在线全文

学校读者我要写书评

暂无评论

Acta Mechanica Sinica 2013年第3期29卷 388-394页

作者： Ke-Qing zheng Meng Ni qiong Sun Li-Yin Shen Building Energy Research Group Department of Building and Real Estate The Hong Kong Polytechnic University

In co-ionic conducting solid oxide fuel cell （SOFC）, both oxygen ion （O2） and proton （H＋） can transport through the electrolyte, generating steam in both the an-ode and cathode. Thus the mass transport phenomenon in the electrodes is quite different from that in conventional SOFC with oxygen ion conducting electrolyte （O-SOFC） or with proton conducting electrolyte （H-SOFC）. The generation of steam in both electrodes also affects the concentration over-potential loss and further the SOFC performance. However, no detailed modeling study on SOFCs with co-ionic electrolyte has been reported yet. In this paper, a new mathematical model for SOFC based on co-ionic electrolyte was developed to predict its actual performance considering three major kinds of overpotentials. Ohm＇s law and the Butler-Volmer formula were used to model the ion conduction and electrochemical reactions, respectively. The dusty gas model （DGM） was employed to simulate the mass transport processes in the porous electrodes. Parametric simulations were performed to investigate the effects of proton transfer number （tH） and current density （jtotal） on the cell performance. It is interesting to find that the co-ionic conducting SOFC could perform better than O-SOFC and H-SOFC by choosing an appropriate proton transfer number. In addition, the co-ionic SOFC shows smaller difference between the anode and cathode concentration overpotentials than O-SOFC and H-SOFC at certain t H values. The results could help material selection for enhancing SOFC performance.

关键词： Co-ionic electrolyte Proton transport number Concentration overpotential Mass transport Model

The integrated quality assessment of Chinese commercial dry red wine based on a method of online HPLC-DAD-CL combined with HPLC-ESI-MS

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Natural Medicines 2014年第7期12卷 517-524页

作者： YU hai-Xiang SUN Li-qiong QI Jin State Key Laboratory of Natural Medicines Department of Complex Prescription of Traditional Chinese Medicine China Pharmaceutical University

AIM: To apply an integrated quality assessment strategy to investigate the quality of multiple Chinese commercial dry red wine samples. METHOD: A comprehensive method was developed by combining a high performance liquid chromatography-diode array detector-chemiluminescence(HPLC-DAD-CL) online hyphenated system with an HPLC-ESI-MS technique. RESULTS: Chromatographic and H2O2-scavenging active fingerprints of thirteen batches of different, commercially available Chinese dry red wine samples were obtained and analyzed. Twenty-five compounds, including eighteen antioxidants were identified and evaluated. The dominant and characteristic antioxidants in the samples were identified. The relationships between antioxidant potency and the cultivated variety of grape, producing area, cellaring period, and trade mark are also discussed. CONCLUSION: The results provide the feasibility for an integrated quality assessment strategy to be efficiently and objectively used in quality(especially antioxidant activity) assessment and identification of dry red wine.

关键词： Integrated quality assessment Dry red wine HPLC-DAD-CL HPLC-ESI-MS

Tomato SlPti5 plays a regulative role in the plant immune response against Botrytis cinerea through modulation of ROS system and hormone pathways

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Agriculture 2022年第3期21卷 697-709页

作者： TANG qiong zheng Xiao-dong GUO Jun YU Ting College of Biosystems Engineering and Food Science National Engineering Laboratory of Intelligent Food Technology and Equipment/Key Laboratory for Agro-Products Postharvest Handling of Ministry of Agriculture/Zhejiang Key Laboratory for AgroFood ProcessingZhejiang UniversityHangzhou 310058P.R.China State Key Laboratory of Food Nutrition and Safety/Key Laboratory of Food Nutrition and Safety Ministry of Education/Key Laboratory of Food Quality and Health of TianjinTianjin University of Science and TechnologyTianjin 300457P.R.China

While SlPti5 has been shown to play a crucial role in the regulation of antagonistic genes in Solanum lycopersicum and Arabidopsis against pathogen infection,there have been no comprehensive studies on the effects of SlPti5 on the regulatory response mechanism of reactive oxygen species(ROS) system and hormone pathways during growth and disease resistance of tomato ***,we investigated the function of SlPti5 in the defense response of tomato against Botrytis cinerea utilizing a virus-induced gene silencing(VIGS)-based *** profile analysis showed that SlPti5 was significantly induced upon *** infection,with high expression levels in the leaves and fruit of ***-based silencing of SlPti5 inhibited early vegetative growth,increased the plant’s susceptibility to infection,promoted the development of ROS,affected the expression of genes involved in the ROS scavenging system,and attenuated the expression of genes associated with pathogenesis and the ethylene/jasmonic acid signaling *** sum,our data demonstrated that SlPti5 stimulates the immune response of tomato plant to Botrytis cinerea infection by involving the ethylene(ET)-and jasmonic acid(JA)-mediated pathways and modulating the expression of some key pathogenesis-related(PR) genes.

关键词： tomato(Solanum lycopersicum) Botrytis cinerea Sl Pti5 immune response ET-and JA-mediated signaling pathways pathogenesis-related proteins

Study on Wave Characteristics from the South Atlantic Ocean to the Gulf of Guinea Based on Short-Term Numerical Simulation in Winter Season

在线全文

学校读者我要写书评

暂无评论

China Ocean Engineering 2023年第2期37卷 312-322页

作者： XU Fu-min zheng Jin-hai YA Han-zheng XING Tian Key Laboratory of Ministry of Education for Coastal Disaster and Protection Hohai UniversityNanjing 210098China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China

Waves play a major role in the ocean phenomena in the Gulf of Guinea(GoG). In order to reveal the spatial-temporal distribution characteristics and the propagation mechanism of waves from the South Atlantic Ocean to the GoG, 4typical points located in mid-latitude of South Atlantic(14°30′W, 30°0′S), south of the GoG(10°30′W, 15°0′S), offshore of the GoG(0°0′, 0°0′) and near shore of the GoG(6°4′58.8″W, 4°3′36″S) are selected, and waves from Atlantic Ocean to GoG are simulated by using a two-layer-nesting wave numerical model SWAN(Simulating Waves Nearshore). The results show that the hybrid waves(waves hereafter) and the swells have strong relationship with local wind in Roaring Forties and at mid-latitude of South Atlantic Ocean, while there is no obvious correlation between waves and local winds in the GoG. Swells are generated in the South Atlantic Ocean and propagate into the GoG. 2D wave spectra at the four selected typical points are simulated. The spectral pattern and wave component structure indicate that the wave system in GoG is dominated by the S-SW swells generated from Roaring Forties and mid-latitude of South Atlantic, whether it is at maximum(2.2-2.8 m), medium(1.8-2.2 m) or minimum(1.2 m) significant wave height in the GoG during simulation period.

关键词： Gulf of Guinea wave characteristics 2D wave spectra swell roaring forties

A novel redox indicator based on relative abundances of C_(31) and C_(32) homohopanes in the Eocene lacustrine Dongying Depression, East China

在线全文

学校读者我要写书评

暂无评论

Petroleum Science 2022年第4期19卷 1494-1504页

作者： Chong Jiang hai-Ping Huang zheng Li Hong Zhang zheng Zhai School of Energy Resource China University of Geosciences(Beijing)Beijing100083China School of Geosciences Yangtze UniversityWuhanHubei430100China Department of Geoscience University of CalgaryCalgaryAlbertaT2N 1N4Canada Geology Scientific Research Institute of Shengli Oilfield Company SinopecDongyingShandong 257015China

A suite of oils and bitumens from the Eocene Shahejie Formation(Es) in Dongying Depression was geochemically characterized to illustrate impact of source input and redox conditions on distributions of pentacyclic terpanes. The Es_(4) developed under highly reducing, sulfidic hypersaline conditions, while Es_(3) formed under dysoxic, brackish to freshwater conditions. Oils derived from Es_(4) are enriched in C_(32) homohopanes(C_(32) H), while those from Es_(3) are prominently enriched in C_(31) homohopanes(C_(31) H). The C_(32) H/C_(31) H ratio shows positive correlation with homohopane index(HHI), gammacerane index, and negative correlation with pristane/phytane ratio, and can be used to evaluate oxic/anoxic conditions during deposition. High C32 H/C_(31) H ratio(> 0.8) is an important characteristic of oils derived from anoxic environments, while low values(< 0.8) indicate dysoxic conditions and extremely low values(< 0.4)indicate strong oxic conditions. The C_(32) H/C_(31) H ratio can be applied for deposition condition diagnosis because carboxyl group of C_(32) hopanoic acids might be reduced to C_(32) homohopanes under anoxic conditions, and oxidized to C_(31) homohopane under oxic conditions. Advantages to use C_(32) H/C_(31) H ratio as redox condition proxy compared to the HHI and gammacerane indexes are wider valid maturity range,less sensitive to biodegradation influence and better differentiating reducing from oxic environments.

关键词： paper Biomarkers C_(32)/C_(31)homohopane ratio Redox conditions Dongying Depression