young s modulus and effects of loading rates
Development of novel chitosan based hollow fiber membranes for applications in water treatment and bioengineering
Ngày tải lên :
14/09/2015, 08:49
... FTIR spectra of (a) CS, (b) CS/SDS nanoparticles and (c) SDS Scheme 5.1 Proposed CS and SDS interaction Figure 5.3 Derivative thermogravimetric (DTG) curve of (a) CS, (b) CS/SDS nanoparticles and ... porous surfaces CS was modified with sodium dodecyl sulfate (SDS) to form nano-particles This modification facilitated the dispersion and dissolution of CS in common organic solvents such as N-methyl-2-pyrrolidone ... VII LIST OF FIGURES Figure 2.1 Schematic representation of a membrane separation process Figure 2.2 Structures of various membrane cross-sections Figure 2.3 Cross-section of a typical asymmetric...
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Development of chitosan based blend hollow fiber membranes for adsorptive separation in environmental engineering and bioengineering applications
Ngày tải lên :
14/09/2015, 11:42
... (PV) Separation of azeotropic liquid mixtures processes, gas separation (GS) is used mainly for separation of gaseous mixtures such as O2/N2 separation and removal of H 2S from natural gas etc ... mixture of gases/vapours, miscible liquids (organic mixtures and aqueous/organic mixtures), solid/liquid, liquid/liquid dispersions and dissolved solutes from liquids [11] A more common classification ... colloids from solutions Removal of hardness (di-valent cations and anions) from solutions Ultrafiltration (UF) Nanofiltration (NF) Reverse Osmosis (RO) Separation of monovalent cations and anions and...
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Fabrication of nanofiltration hollow fiber membranes for sustainable pharmaceutical manufacture
Ngày tải lên :
12/09/2015, 11:29
... roughness parameters such as Ra, Rms, Rmax and dimensions of nodule size in both x and y directions As shown in Table 2.4, the nodule sizes in both directions decrease while the roughness parameters ... Widjojo and Dr Wang Yan for their assistance and generous suggestions Last but not least, I am most grateful to my parents, Mr Sun Yunsheng and Ms Dong Wen, and my wife Ms Li Xin, for their endless ... membrane structure parameters Molecular weights, diffusivities and Stokes radii of neutral solutes are listed in Table 2.1 [63] All chemicals were used as received Table 2.1 Diffusivities and Stokes...
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Dual layer asymmetric hollow fiber membranes for gas separation
Ngày tải lên :
16/09/2015, 17:11
... polymer-assisted phase-inversion PES Polyethersulfone PI Polyimide PV Pervaporation P/L Permeance of Gases (1 GPU = 1×10-6 cm3(STP)/cm2 s cmHg) RM Resistance Model RO Reverse Osmosis xxviii scfd Standard ... commercialization of gas separation membranes is the discovery of integrally skinned asymmetric membranes for reverse osmosis process by Loeb and Sourirajan in 1960 (Loeb and Sourirajan, 1964; Matsuura, ... Knudsen s results, the first large-scale application of microporous membranes in gas separation was established for the separation of uranium isotopes (Stern, 1994) Even though the selectivity of...
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Extractant impregnated hollow fiber membranes for phenol recovery from wastewater
Ngày tải lên :
30/09/2015, 10:12
... disinfectants, antiseptics and drugs such as Aspirin It is also a starting material for the production of plastics, paints and dyes, explosives and is even used as an antioxidant in food items ... high mass transfer rates, the dispersive liquid-liquid extraction system has several disadvantages Dispersion of phases often leads to formation of stable emulsions which are difficult to separate ... semidispersive method accomplishes the stability of membrane performance and increases 21 mass transfer due to presence of dispersed droplets, it brings back issues like emulsion formation, phase separation,...
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The development of pervaporation hollow fiber membranes for isopropanol dehydration
Ngày tải lên :
16/10/2015, 15:38
... Osmosis Dialysis Nonporous Pressure difference Solution diffusion mechanism Separation of salts and microsolutes from solutions Separation of salts Microporous membrane Concentration or Diffusion ... R3 Pore R1 = resistance of the skin layer (=Rskin) R2 = resistance of the pores in the substrate R3 = resistance of the polymer matrix in the substrate Rsub = resistance of the substrate [=R2R3/(R2+R3)] ... streams The emission of VOCs from industrial and municipal wastewater streams are of great concern due to the toxic and carcinogenic effects of VOCs VOCs include solvents from petroleum industry,...
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Symbiotic hollow fiber membrane photobioreactor for microalgal growth and activated sludge waste water treatment
Ngày tải lên :
09/09/2015, 11:31
... protocols used in the research Chapter summarizes the results obtained from the baseline studies on suspended cultures of C vulgaris and P putida Chapter presents the results on proof - of – concept ... Nannochloropsis, Skeletonema and Thalassiosira (Apt and Behrens 1999; Spolaore et al 2006; Yamaguchi 1996) Microalgal biomass is also proven its suitability as feed supplement for many types of animals such ... larvae of many species such as mollusks, 17 crustaceans and fish The most frequently used species in aquaculture are Chlorella, Tetraselmis, Isochrysis, Pavlova, Phaeodactylum, Chaetoceros, Nannochloropsis,...
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Hollow fiber membrane design for membrane distillation (MD) and MD based hybrid processes
Ngày tải lên :
10/09/2015, 09:08
... p viscosities of feed and permeate solutions, respectively (kg m-1 s- 1) f , p densities of feed and permeate solutions, respectively (kg m-3) membrane pore tortuosity xv LIST OF TABLES Table ... C) and D): VMD permeation fluxes of MBF3 and SBF membranes based on inner and outer surface of the fibres 130 Figure 6.6 The cross-section and inner surface morphologies of MBF membranes spun ... or reverse osmosis (RO) process have been evaluated by several research groups [22-26] Positive results were reported by these papers [27] The comparison between MD and RO processes showed higher...
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Development and application of hollow fiber protected liquid phase microextraction for trace organic analysis
Ngày tải lên :
12/09/2015, 08:20
... impressed me very much I would also like to express my special thanks to Ms Frances Lim for her technical assistance and suggestions Appreciation is also addressed to the staff in the Chemistry Store ... operations and closed systems [4] However, there are still some limits such as the long-term stability problem of membranes and memory effects, which result from the incomplete transfer of analyte ... help of mass spectrometry (MS) The most frequently-used derivatives include esters, ethers, acyl derivatives, silyl derivatives, oximes, hydrazones, and cyclic derivatives for GC analysis [92]...
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Dual layer hollow fiber membrane development for forward osmosis and osmosis power generation
Ngày tải lên :
04/10/2015, 17:06
... pressure (TMP) difference (ΔP): reverse osmosis (RO), pressure retarded osmosis (PRO) and forward osmosis (FO) Fig 1.1 illustrates the differences of the three processes The main advantages of ... membrane structure parameters 2.2 Shear viscosity and phase inversion kinetics of the solutions The shear viscosities of PAN solutions with and without PVP were measured at shear rates from 0.1 ... segments Hence the stiffness of polymer chains may increase with increasing POSS loading Such entangled network structure possibly makes the nascent fibers stronger to balance shrinkage stresses,...
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A STUDY OF THE RELATIONSHIP BETWEEN CEO COMPENSATION AND FIRM PERFORMANCE IN THE US AIRLINE INDUSTRY 2002 2006
Ngày tải lên :
11/09/2013, 11:44
... CHAPTER RESULTS AND ANALYSIS 73 Introduction 73 Research Questions 73 Hypotheses 74 Variables 75 Analytical Techniques 75 Descriptive Statistics 77 Test of Hypotheses One 75 Test of Hypotheses Two ... most other types of businesses [and] the industry has the worst financial performance of any … major business sector” (p 2) Although the industry has seen some profitable years, the industry as ... grants and exercise prices, CEO age and tenure and CEO shareholdings were used as measures of CEO compensation while ROE was adapted as a measure of firm performance The results of the analysis of...
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Measuring and Tuning Performance
Ngày tải lên :
05/10/2013, 14:20
... WAST to develop loading scenarios and then analyze the throughput costs Web Application Stress Tool (WAST) WAST allows you to stress test You record scripts that make requests and build a list ... clear estimate of site usage, build a test bed that parallels the actual usage scenario (s) Use the MCMS TCA and the WAST to stress test your test site Calculate the cost per user in CPU cycles and ... average Page Size User walk-away happens when response time grows too long Microsoft suggests a good rule of thumb is that pages serve up in less than seconds Large pages tend to be slow to serve up...
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Fiber Connectivity and Cable Management
Ngày tải lên :
18/10/2013, 19:15
... terminations (12 pairs) using simplex connectors (SC, FC, ST) • Modules may be added to the chassis as needed • 4RU chassis houses modules to provide 48 fiber terminations (24 pairs) using smallform-factor ... chassis with power supply RU chassis with power supply and IEC cord, patch cord storage in rear PPO-3RU-P RU chassis with power supply and IEC cord, splice tray area in rear PPO-3RU -S RU chassis ... Angle Polish) SMSC N SMSC (Zirconia adapter) J SMSC (8 degree Angle Polish SMST SMLC (4 RU only) X SMALX.5 (4 RU only) Rear Connector/Splice SMFC F SMFC (8 degree Angle Polish) SMSC N SMSC (Zirconia...
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Tài liệu Democracy and Economic Performance pptx
Ngày tải lên :
09/12/2013, 20:15
... =1) is associated with reductions in the standard deviations of growth rates of GDP, consumption, and investment of 1.3, 2.3, and 4.4 percentage points, respectively These effects are fairly sizable ... number of time-series observations and the relatively small variation in democracy over time in most countries, it is striking that the results of the fixed effects regressions are so strong This ... 1985-89, and 1990-94 OLS and random effects regressions include a constant term and dummies for East Asia, Latin America, Sub-Saharan Africa, socialist countries, OECD members, and oil exporters (coefficient...
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Tài liệu Overview Series: Windows Vista Performance and TuningImprove Performance Quickly and EasilyThe doc
Ngày tải lên :
17/12/2013, 13:15
... system processes Non-paged kernel memory can be used by applications when necessary System provides totals for the number of handles, threads, and processes currently running A process is a single ... Sleep is a feature in Windows Vista, supplanting the Standby feature of previous Windows OS versions In the past, Standby didn’t always work well and computers were slow to come out of standby ... in this document represents the current view of Microsoft Corporation on the issues discussed as of the date of publication Because Microsoft must respond to changing market conditions, this document...
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CAPITAL STRUCTURE AND FIRM PERFORMANCE IN VIETNAM
Ngày tải lên :
26/12/2013, 15:19
... the past two years Besides, less positive outlook and deteriorating business performance of the majority of businesses made shares of these firms also became less attractive to investors Just because ... TD-Tobin s Q Test cross-section random effects Test Summary Cross-section random Chi-Sq StatisticChi-Sq d.f 9.552195 Prob 0.0228 Chi-Sq StatisticChi-Sq d.f Prob Correlated Random Effects - Hausman Test ... TD-ROA Test cross-section random effects Test Summary Chi-Sq Statistic Cross-section random 2.276603 Chi-Sq d.f.Prob 0.5170 Correlated Random Effects - Hausman Test Equation: LTD-ROA Test cross-section...
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