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In situ Fourier Transform Infrared Spectroscopy Diagnostic for Characterization and Performance Test of Catalysts

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Chinese Journal of Chemical Physics 2017年第5期30卷 513-520,I0001页

作者： patrick Mountapmbeme Kouotou 田振玉中国科学院工程热物理研究所北京100190 中国科学院大学北京100049 马鲁阿大学萨赫拉高等研究院喀麦隆

The present work establishes a systematic approach based on the application of in-situ Fourier transform infrared spectroscopy （FTIR） for the investigation of the crystal structure, thermal stability, redox behavior （temperature-programmed reduction/temperatureprogrammed re-oxidation） as well as the catalytic properties of Co3O4 thin films. The syntheses of Co3O4 were achieved by chemical vapor deposition in the temperature range of 400-500℃. The structure analysis of the as-prepared material revealed the presence of two prominent IR bands peaking at 544 cm-1 （υ1） and 650 cm-1 （υ2） respectively, which originate from the stretching vibrations of the Co-O bond, characteristic of the Co3O4 spinel. The lattice stability limit of Co3O4 was estimated to be above 650℃. The redox properties of the spinel structure were determined by integrating the area under the emission bands υ1 and υ2 as a function of the temperature. Moreover, Co3O4 has been successfully tested as a catalyst towards complete oxidation of dimethyl ether below 340 ℃. The exhaust gas analysis during the catalytic process by in situ absorption FTIR revealed that only CO2 and H2O were detected as the final products in the catalytic reaction. The redox behavior suggests that the oxidation of dimethyl ether over Co3O4 follows a Mars-van Krevelen type mechanism. The comprehensive application of in situ FTIR provides a novel diagnostic tool in characterization and performance test of catalysts.

关键词： In situ Fourier transform infrared spectroscopy Diagnostic Thermal stability Redox property Catalytic mechanism

Construction of One-Lee Weight and Two-Lee Weight Codes over IF_p+vIF_p

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Journal of Systems Science & Complexity 2017年第2期30卷 484-493页

作者： SHI Minjia LUO Yong SOLE patrick Key Laboratory of Intelligent Computing&Signal Processing Ministry of EducationAnhui UniversityHefei 230039China School of Mathematical Sciences Anhui UniversityHefei 230601China National Mobile Communications Research Laboratory Southeast UniversityNanjing 210096China Telecom Paris Tech ParisFrance

This paper is devoted to the construction of one-Lee weight codes and two-Lee weight codes over IF_p+vIF_p(v^2=v) with type p^(2 k_1)p^(k2)p^(k3) based on two different distance-preserving Gray maps from((IF_p+vIF_p)~n, Lee weight) to(IF_p^(2 n), Hamming weight), where p is a prime. Moreover, the authors prove that the obtained two-Lee weight codes are projective only when p=2.

关键词： Generator matrix Gray map linear code one-Lee weight code two-Lee weight code

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A Time to Remember:Neural Insights into Rapid Updating of Timed Behaviors

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Neuroscience Bulletin 2023年第4期39卷 699-702页

作者： Christopher Howard patrick Simen Neuroscience Department Oberlin CollegeOberlinOH44074USA

Processing temporal information is a critical brain function necessary for decision-making and *** timing,or processing of time intervals on the scale of seconds to minutes,is essential for associative learning,sensorimotor processing,and optimal foraging[1]and many neuropsychiatric illnesses including Parkinson's Disease,Huntington's Disease,and schizophrenia involve impaired interval timing.

关键词： Huntington impaired dating

The role of calcium sensor-interacting protein kinases in plant adaptation to potassium-deficiency: new answers to old questions

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Cell Research 2007年第6期17卷 483-485页

作者： Anna Amtmann patrick Armengaud Plant Sciences Group.Institute of Biomedical and Life Sciences University of GlasgowGlasgow G12 8QQUK.

Potassium （K-） is an essential macronutrient for all livingorganisms and large amounts are required for plant growthand development. In many regions of Asia K+-fertilizationhas been neglected and soils have become K+-depleted. K+-deficiency in the field diminishes not only crop productionbut also leads to environmental problems due to inefficientusage and leaching of nitrate. Consequences of K+-defi-ciency on crop production range from decreased biomass,nutritional quality and taste of the crops to inferior harvestand storage properties, as well as increased susceptibilityto disease. Effects of K+-deficiency on plant physiology in-clude decreased photosynthetic rate, impaired tissue alloca-tion of sugars and amino acids, decreased protein synthesis,and lack of control over turgor and gas exchange [1], K+-uptake and its re-distribution within the plant is facilitatedby a plethora of membrane transport proteins displayingan astonishing diversity with respect to their affinity andselectivity for K+, mode and direction of transport, tissuespecific expression, membrane localization and regulation[2]. Microarray experiments have shown that in contrastto transporters of other macronutrients - genes encodingK--transporters display surprisingly little responsiveness tothe external nutrient supply [3]. This observation probably

关键词： CIPK The role of calcium sensor-interacting protein kinases in plant adaptation to potassium-deficiency new answers to old questions

Two-Weight Codes and Second Order Recurrences

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Chinese Journal of Electronics 2019年第6期28卷 1127-1130页

作者： SHI Minjia ZHANG Zhongyi SOLé patrick Key Laboratory of Intelligent Computing and Signal Processing of Ministry of Education School of Mathematical Sciences Anhui University School of Wendian Anhui University Aix Marseille Univ CNRS Centrale Marseile

Cyclic codes of dimension 2 over a finite field are shown to have at most two nonzero weights. We compute their weight distribution, and give a condition on the roots of their check polynomials for them to be maximum ... 详细信息

关键词： Two-weight codes Irreducible Cyclic codes MDS codes Linear recurrences

Harnessing the RNA interference pathway to advance treatment and prevention of hepatocellular carcinoma

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World Journal of Gastroenterology 2008年第11期14卷 1670-1681页

作者： patrick Arbuthnot Liam Jed Thompson Antiviral GeneTherapy Research Unit Department of Molecular Medicine andHaematologyUniversity of the Witwatersrand Medical SchoolPrivate Bag 3WITS 2050South Africa

Primary liver cancer is the fifth most common malignan- cy in the world and is a leading cause of cancer-related *** treatment for hepatocellular carcino- ma(HCC),the commonest primary liver cancer,is rarely curative and there is a need to develop therapy that is more *** and powerful gene silencing that can be achieved by activating RNA interference(RNAi) has generated enthusiasm for exploiting this pathway for HCC *** studies have been carried out with the aim of silencing HCC-related cellular oncogenes or the hepatocarcinogenic hepatitis B virus(HBV)and hepatitis C virus(HCV).Proof of principle studies have demonstrated promising results,and an early clinical trial assessing RNAi-based HBV therapy is currently in *** the data augur well,there are several significant hurdles that need to be overcome before the goal of RNAi-based therapy for HCC is ***- larly important are the efficient and safe delivery of RNAi effecters to target malignant tissue and the limitation of unintended harmful non-specific effects.

关键词： RNA interference Hepatocellular carcinoma Hepatitis B virus Hepatitis C virus Molecular pathogenesis Delivery vectors

A Pivotal Role of DELLAs in Regulating Multiple Hormone Signals

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Molecular Plant 2016年第1期9卷 10-20页

作者： Jean-Michel Daviere patrick Achard Institut de Biologie Moleculaire des Plantes (IBMP) UPR2357 associe avec l'Universite de Strasbourg 12 rue General Zimmer 67084 Strasbourg Cedex France

Plant phenotypic plasticity is controlled by diverse hormone pathways, which integrate and convey infor- mation from multiple developmental and environmental signals. Moreover, in plants many processes such as growth, development, and defense are regulated in similar ways by multiple hormones. Among them, gibberellins （GAs） are phytohormones with pleiotropic actions, regulating various growth processes throughout the plant life cycle. Previous work has revealed extensive interplay between GAs and other hor- mones, but the molecular mechanism became apparent only recently. Molecular and physiological studies have demonstrated that DELLA proteins, considered as master negative regulators of GA signaling, inte- grate multiple hormone signaling pathways through physical interactions with transcription factors or reg- ulatory proteins from different families. In this review, we summarize the latest progress in GA signaling and its direct crosstalk with the main phytohormone signaling, emphasizing the multifaceted role of DELLA proteins with key components of major hormone signaling pathways.

关键词： gibberellins DELLAs hormone crosstalk plant development phenotypic plasticity

The immune tolerant phase of chronic HBV infection： new perspectives on an old concept

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Cellular & Molecular Immunology 2015年第3期12卷 258-263页

作者： Antonio Bertoletti patrick T Kennedy Emerging Infectious Diseases (EID) Program Duke-NUS Graduate Medical School Singapore Viral Hepatitis Laboratory Singapore Institute for ClinicalSciences Agency of Science Technology and Research (A＊STAR) Singapore and Blizard Institute Barts and The London School of Medicine & DentistryLondon UK

Chronic hepatitis B virus （HBV） infection progresses through distinct disease phases that are strongly associated with patient age. The so-called immune tolerant （IT） phase represents the classical early phase of infection; it is associated with high levels of HBV replication and lack of clinical signs of liver Inflammation. Whether this phase of HBV infection is also associated with immunological features of ＂tolerance＇ has recently been challenged. Here, we review the data that dispute this concept of immune tolerance and then propose an alternative interpretation of the immunopathological events that take place during this early phase of CHB infection.

关键词： Hepatitis B antiviral immunity T cells

A survey of the Szeg? equation Dedicated to Professor Jean-Yves Chemin on the Occasion of His 60th Birthday

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Science China Mathematics 2019年第6期62卷 1087-1100页

作者： patrick Gérard Sandrine Grellier Laboratoire de Mathématiques d'Orsay Université Paris-Sud CNRSUniversité Paris-Saclay Institut Denis Poisson-Université d'Orléans/Université de Tours CNRS UMR

We survey the main properties of the cubic Szeg? equation from the PDE viewpoint, emphasising global existence of smooth solutions, analytic regularity, growth of high Sobolev norms and the effects of weak damping.

关键词： cubic Szego equation integrable system Hankel operator spectral analysis analytic regularity wave turbulence

维普期刊数据库