structure size and surface area

preparation and characterization of high surface area nanosheet titania with mesoporous structure

Ngày tải lên : 20/03/2014, 13:06

... procedure narrow pore size distribution had an average pore diameter about 3– nm The BET surface area and pore volume of the as-synthesized nanosheet TiO2 are about 642 m2/g and 0.774 cm3/g, respectively ... Conclusions In summary, high surface area nanosheet TiO2 with mesoporous structure were synthesized by hydrothermal Fig X-ray diffraction pattern of the as-synthesized nanosheet TiO2 and nanosheet TiO2 ... growth diagram of nanosheet and nanorods/nanoparticles TiO2 surface area and pore volume of the sample are about 642 m2/g and 0.774 cm3/g, respectively The nanosheet structure after calcinations...

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Large area plasmonic structure fabrication and tuning of surface plasmon resonance

Ngày tải lên : 16/10/2015, 11:57

... Tuning of surface plasmon resonance by sphere size and film thickness The influences of sphere size and metal film thickness on plasmonic effect of these colloidal lithography fabricated nanostructures ... gives a brief introduction to surface plasmon and its significance and applications, and reviews the fabrication techniques of metallic nanostructures The objective and contributions of this study ... monolayer masks, and subsequently used to fabricate metallic or bimetallic nanostructures fo various size and thickness The SPR tuning by the fabricated nanostructures are characterized and explained...

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INFLUENCE OF STREAMSIDE SURFACE AREA ON AQUATIC BIOTA AND BIOFILM ACTIVITY

Ngày tải lên : 05/09/2013, 08:40

... protozoa and metazoa, their density per surface area was high in the gravel-filled channel, and oxygen uptake rate downstream also became higher Based on the above, it suggests that surface area and ... sectional area Surface area (m2) (m2･m-flow direction-1) 0.0252 0.55 0.0257 Analytic method of water quality Collecting and analyzing sample water were performed at each point in the daytime and nighttime ... the surface area of the streamside in a flow water system on succession of aquatic biotas and microbial activities As the result, the gravel-filled multilayer structure promotes removal of SS, and...

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Báo cáo khoa học: Surface-enhanced vibrational spectroscopy for probing transient interactions of proteins with biomimetic interfaces: electric field effects on structure, dynamics and function of cytochromec doc

Ngày tải lên : 22/03/2014, 16:20

... demands are imposed on the sensitivity and selectivity of the methodology, which should provide molecular structure and dynamics information In this article, we present the potential of Raman and ... optical processes via coupling of the radiation ﬁeld with surface plasmons of nanostructured Ag or Au These surface- enhanced RR (SERR) and surface- enhanced IR absorption (SEIRA) difference spectroscopies ... physiological processes of cytochrome c Methodology Raman and IR spectroscopy are molecular structuresensitive techniques, as the frequencies and band intensities of vibrational transitions represent...

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powder surface area and porosity

Ngày tải lên : 31/05/2014, 01:26

... (Seymour), 1931Powder surface area and porosity (Powder technology series) Rev ed of: Introduction to powder surface area 1979 Bibliography: p Includes index Powders Surfaces—Areas and volumes Porosity ... surface area and porosity.—2nd ed.— (Powder technology series) Powders—Surfaces Surfaces—Areas and volumes I Title II Shields, Joan E III Lowell, S Introduction to powder surface area IV Series ... Technologie The Netherlands Contents Preface xi List of symbols xii PARTI THEORETICAL Introduction 1.1 Real surfaces 1.2 Factors affecting surface area 1.3 Surface area from size distributions Gas...

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Nanoscale metal-organic frameworks synthesis and application of bimodal micromeso-structure and nanocrystals with controlled size and shape

Ngày tải lên : 02/07/2014, 13:40

... enlarge their pore size toward the mesopore regime (pore size of 250 nm)24,25 and to downsize their crystal size to the nanometer scale have thus emerged.26 The mesopores and nanosizes promote the ... Mesoporous structure (Å) MOFs Linkers Apertures (Å) Cages Channels Ref Templates MIL-101 BDC 29 and 34 12.0 and 14.7 64 MIL-101_NDC 2,6-NDC 39 and 46 13.5 and 18.2 114 MIL-100 BTC 25 and 29 4.8 and ... between photogenerated electrons and holes because of its thin wall and the surface separation of two distinct functional cocatalysts (Fe2O3 and PtOx) on two different surface sides of the hollow...

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Báo cáo lâm nghiệp:"Estimation of crown radii and crown projection area from stem size and tree position" pps

Ngày tải lên : 08/08/2014, 01:21

... research areas In this paper, such an approach is presented that is based on the size of a tree and the size and position of surrounding competitors Also, the sum of crown projection area and canopy ... length and potential crown cover (pr1 and pr2: maximum radii, alin1 and blin1: linear radii estimation, alog and blog: logarithmic crown area estimation, alin1 and blin2: linear crown area estimation, ... Mensuration and Growth and Yield Research, Danish Forest and Landscape Research Institute/Ministry of Environment and Energy, Tampere, Finland, 1995, pp 234241 [50] Wang Y.P., Jarvis P.G., Description and...

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báo cáo khoa học: " Surface structure, model and mechanism of an insect integument adapted to be damaged easily" pot

Ngày tải lên : 11/08/2014, 00:22

... on a micro-structured surface and a coating of waxy crystals Both characteristics contribute in rendering the surface hydrophobic [23,24] The optimal configuration and size of the structures ... Microstructures covering the cuticle surface The larvae of sawfly species observed by SEM showed above surface microstructures of their cuticle and which are described below These microstructures ... insect both these coarse and finer structures are provided by the spider-like structures (Results), whereas in the plant each scale of structures is due to microstructures and waxy crystals, respectively...

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báo cáo khoa học: "Determination of the volume-specific surface area by using transmission electron tomography for characterization and definition of nanomaterials" docx

Ngày tải lên : 11/08/2014, 00:23

... on their electron density and size The surface area and volume of individual spherical particles were approximated by the formulas to calculate the surface area (4πr ) and the volume (4/3πr ) of ... almost spherical and that their surface area and volume can be closely approximated by the formulas to calculate the surface area and the volume of a perfect sphere Figure 1C and 1D show the correlations ... between the calculated and measured volume and surface area, respectively, for ten ET reconstructions consisting of one to 11 gold NP Both for the volume and the surface area, the Spearman correlation...

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The novelty and surface to volume ratio dependent electron band structure in semiconductor nanowire

Ngày tải lên : 09/09/2015, 18:55

... dimensions, the surface reconstruction will affect the band structure [17] Here, we concentrate on the dependence of band structure on the size and transverse cross sectional shapes Therefore, no surface ... find the electronic band structure and band gaps [Chapter Modeling and Methodology] 26 References: [1] W Kohn Nobel lecture: Electronic structure of matter—wave functions and density functionals ... 15], surface passivation [16], surface reconstruction [17], band structure effects vs diameter [3], mechanical properties and phonons [18, 19, 20, 21], and transport [12, 13, 22, 23] Standard...

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Nanomesh on SIC surface structure, reactions and template effects

Ngày tải lên : 11/09/2015, 10:07

... form the valence band As the valence band is sensitive to the chemical reactions and other subtle interactions at surface and interface, the understanding of the valence band structure is very ... objectives To understand the atomic structures of a surface is always the primary task in surface science This understanding serves as the starting point for the studies of other surface related phenomena, ... on Au(788) vicinal surface; [77] b Fe islands on Cu/Pt(111) strain-relief pattern;[78] c 1nitronaphthalene (NN) on Au(111) reconstructed surface; [79] c' and c" show internal structure of one NN...

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THE SIZE AND STRUCTURE OF MARITIME CITIES IN SOUTHEAST ASIA

Ngày tải lên : 06/10/2015, 21:23

... becomes possible to understand changes that were occurring in the greater world of island Southeast Asia The nature of changes in the urban structure and function, and in the society that the ... relatively densely populated area, possess various economic and cultural functions, and have at least one tier of settlements under it Methodology: urban type, hierarchy and structure Urban types Traditionally, ... understanding that cities can and change over time 22 Robert Redfield and Milton B Singer, “The Cultural Role of Cities”, Economic Development and Cultural Change, 3, 1, (1954): 58 23 Redfield and...

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High-Surface-Area Catalyst Design- Synthesis, Characterization, and Reaction Studies of Platinum Nanoparticles in Mesoporous SBA-15 Silica

Ngày tải lên : 08/10/2015, 23:16

... particle size and surface structure, particle location within support) that can be rationally tuned This permits promising experimental studies of structure- activity and more importantly structureselectivity ... free-standing TEM particle and that determined by selective Design of Pt/SBA-15 High -Surface- Area Catalyst J Phys Chem B, Vol 109, No 6, 2005 2197 TABLE Probe Gas Uptake and Average Particle Size ... Pt particle sizes were measured by XRD and TEM Figure shows that the particles are uniform and have a narrow size distribution An example of the particle size distribution for freestanding 2.9-nm...

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The effect of sulphuric acid activation on the crystallinity, surface area, porosity, surface acidity, and bleaching power of a bentonite

Ngày tải lên : 09/10/2015, 00:00

... The area of the inner and outer walls of the pores located intra- and interparticles in g solid is taken as the speciﬁc surface area (S) The adsorptive surface originates from the micro- and ... H2SO4-treated bentonite samples by making use of surface area, surface acidity, porosity and mesopore size distribution parameters Materials and methods 2.1 Materials A calcium-rich bentonite ... capillary condensation can only occur at x = 0.4 3.3 Surface area The speciﬁc surface areas of the samples were obtained from the standard Brunauer, Emmett and Teller (BET) method by using the adsorption...

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Synthesis of high surface area zirconia and zirconia based catalysts

Ngày tải lên : 16/10/2015, 12:00

... lower surface areas of

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HUMAN MILK OLIGOSACCHARIDES: CHEMICAL STRUCTURE, FUNCTIONS AND ENZYMATIC SYNTHESIS

Ngày tải lên : 28/08/2013, 16:28

... The motif with terminal structure Fucα1-2Gal is H antigen, and H antigen is attached to GlcNAc with β1,3 and β-1,4-linkages to create H1 and H2 antigens, respectively A and B antigens are formed ... Fierfort and coworkers (2008) and Drounilard and coworkers (2010) have successfully developed a microbiological process to economically produce 3′sialyllactose (Fierfort and Samain, 2008) and 6′sialyllactose ... later life (Palmer et al., 2007) 2.2 Structures and biosynthesis of HMOs HMOs are the third most abundant molecular species in human milk after lactose and fat and amount approximately 15g/L (Coppa...

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GENOTYPING OF CLOSTRIDIUM PERFRINGENS ISOLATED FROM CATTLE AND PIGS WITH DIARRHEA IN HANOI AND SURROUNDING AREAS, VIETNAM

Ngày tải lên : 29/08/2013, 08:14

... cattle and pigs with diarrhea in Hanoi and surrounding areas, Vietnam 3.2 Genotyping of C perfringens the toxicity of C perfringens isolates and the correlation between diarrhea in animals and the ... Frey, M.R Popoff, and J.F van den Bosch (1999) Detection of the β2 toxin gene of Clostridium perfringens in diarrhoeic piglets in The Netherlands and Switzerland FEMS Immunology and Medical Microbiology ... epidemiological survey of prevalence and molecular typing of C perfringens isolates associated with diarrhea in cattle and pigs in Hanoi and surrounding areas The results could lead to optimal...

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Structure - Grammar and Style

Ngày tải lên : 01/11/2013, 15:20

... between clear, smooth sentences and sentences that are clunky and confusing: misplaced or dangling modiﬁers, parallel structure, and wordiness and redundancy M ISPLACED AND D ANGLING M ODIFIERS Be ... Incomplete sentence and consists of 15 incomplete sentences ( structure sentences with underlined words and phrases will be questions) and Part B consists of 25 sentences with presented at random underlined ... water level in the reservoir and tested it for contaminants Horace and Renee both told the detective a different story 55 – STRUCTURE: GRAMMAR AND STYLE – I NDEPENDENT AND D EPENDENT C LAUSES A...

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Tài liệu Working with Wireframe and Surface Design Workbench doc

Ngày tải lên : 16/12/2013, 03:15

... the curves and support surfaces to create the blend surface and Figure 9-37 shows the resulting blend surface Figure 9-36 The curves and support surfaces Figure 9-37 The resulting blend surface ... create the offset surfaces Figure 9-17 shows a reference surface and an offset surface Figure 9-17 An offset surface Note Sometime for complex reference surfaces, the offset surface may not be ... Multi-sections Surface Definition dialog, box and complete the multi section surface Figure 9-33 shows sections and guide curves to create the multisection surface and Figure 9-34 shows the resulting surface...

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Tài liệu Chapter 2: Indicators of Financial Structure, Development, and Soundness ppt

Ngày tải lên : 17/12/2013, 05:15

... institutions and their asset positions, and (b) the number of and growth rates of 10 11 12 A B C D E F G H I 16 Chapter 2: Indicators of Financial Structure, Development, and Soundness available money and ... capitalization (%) Size of derivative markets • • • • Types and number of schemes (unique and mixed funds) Total assets and growth rates (nominal and as percentage of GDP) Total number of investors and average ... regulation and accounting standards often have provided incentives for developing new ways to manage risks (e.g., asset and liability management for insurance company and pension funds) and have...

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