characterization of dendritic polymers

... the synthesis and characterization of novel linear homopolymers, block copolymers, and star-branched polymers and the subsequent modification of silicon/SiO2 surfaces with these polymers via covalent ... attachment of polymers to surfaces may be the most promising approach The commercial availability of a wide variety of polymers and the ability to tune the physical/chemical properties of polymers ... Branched Polymers 2.3.1 Introduction In terms of chemical compositions, polymers attached to surfaces include homopolymers (both neutral and charged), mixed homopolymers, block copolymers, random copolymers,...

Ngày tải lên: 13/11/2014, 11:09

... Unlike simple molecules, polymers have a distribution of relaxation times This non-exponential nature of the relaxation functions of polymers has led to the development of many theories to model ... 3-D AFM image of a clean silicon wafer 49 Figure 5.4-3: AFM image of 40t sample after 10 hours of toluene wash 50 Figure 5.4-4: AFM image of 100t sample after 10 hours of toluene wash ... morphological behavior of polymer brush films Industrial use of thin films has increased for several reasons including the development of ever-smaller electronic devices As applications of polymers become...

Ngày tải lên: 23/03/2014, 01:20

... Identification of IL-4-producing cells of MLN in 4get mice 108 Figure 4.2.3 Kinetics of IL-4-eGFP+ CD4 T cells in MLN of 4get mice 110 Figure 4.2.4 Kinetics of IL-4-eGFP+ innate cells in MLN of 4get ... vivo characterization of lung dendritic cells 116 5.3 Inhibited dendritic cell migration greatly diminishes Th2 immunity induced by inhaled Blo t 121 5.4 In vivo depletion of ... 60 2.3.2 Adoptive transfer of CD4 T cells 61 2.3.3 Sorting of CD4 T cells 61 2.3.4 CFSE labeling of CD4 T cells 62 2.3.5 Isolation of dendritic cells from lung Parenchymal...

Ngày tải lên: 10/09/2015, 09:04

... the origin of semiconducting or conducting properties of conjugated polymers The combination of the properties of the σ and π electrons allows these polymers to survive in a wide range of oxidation ... Thank you i Table of Contents Acknowledgement i Table of Contents ii Summary vii List of Tables ix List of Figures x Chapter Introduction Conjugated polymers 1.1.1 Structure of conjugated polymer ... electrochemical data of the polymers P1 and P2 78 Table 3.1 The SEC data of polymer P1 and P2 87 Table 3.2 The optical data and fluorescence quantum yields (both in chloroform solutions) of polymer P1...

Ngày tải lên: 11/09/2015, 09:10

... than hitherto possible in commercial polymers Molecular stiffness enables the precise placement and functional control of shape-persistent polymers Stiff polymers, combined with precise molecular ... interaction between theses groups is expected to help the self-assembly of the polymers The length of the alkyl chain and position of the alkyl chain on the mesogenic units appears to have significant ... self-assembly whereas the pyrimidine groups stabilized the self-assembly of jacketed polymers A series of novel jacketed liquid crystalline polymers, in which the terphenyl aromatic rigid core with alkyl...

Ngày tải lên: 16/09/2015, 17:11

... 100 Loading of chromphore (wt%) Figure 5.6 The effect of the concentration of chromophoric polymers on sensitivity of the photo resists The good solubility and lack of crystallization of the chromophore-immobilized ... image of (a) pure 3a and (b) pure 3b after excitation by electron beam of 13 kV voltage (the magnification of the picture is only 100 times) a b Figure 5.5 The fluorescence image of a set of 0.5 ... interline spacing of µm were made using an e-beam with a dosage of 300 µC/cm2 The polymer film was deposited on a silicon wafer via spin-coating a homogenous mixture of polymers (25 wt % of the PMMA...

Ngày tải lên: 16/09/2015, 17:11

... increase of the peak at around 1190 cm -1 means the increase of the SO3- groups upon deprontonation, which support the formation of the complexes A shift of 57 cm-1 corresponding to the formation of ... the decrease in the effect of pyrimidine groups with the increase of amounts of DBSA The diameter of the fiber from pristine polymer is about 100 nm while the diameter of the particle from complex ... Pn(DBSA)x, where x is the number of DBSA molecules per repeating unit of the host polymer 4.3 Results and Discussion 4.3.1 FTIR characterization The interaction of the two components in complexes...

Ngày tải lên: 16/09/2015, 17:11

... This new approach of synthesis of mesogenic polymer offers a rational design for the organized supramolecular materials 4, 22-23 Here, we report the synthesis of a series of polymers with laterally ... Synthesis of polymers The polymers were synthesized through radical polymerization from the appropriate monomers The concentration of initiator BPO was 1.0 mol % based on the amount of the monomer ... absence of a C=C band at 1640 cm-1 in the FTIR spectrum of P1-C4 also indicates that the monomer has reacted to form a polymer 3.3.2 Thermal characterization The thermal stability of polymers...

Ngày tải lên: 16/09/2015, 17:11

... Synthesis of polymers The polymers were synthesized through radical polymerization from the appropriate monomers The concentration of initiator BPO was 1.0 mol % based on the amount of the monomer ... cooling of the melt of P03 only gave atypical birefringent textures, from which the exact nature of the mesophase was difficult to identify It is well known that the broad polydispersity of polymers ... characteristic of methacrylic carbon double bond protons It is noted that in the spectrum of polymer P03, these two signals disappears The absence of a C=C band at 1640 cm-1 in the FTIR spectrum of P03...

Ngày tải lên: 16/09/2015, 17:11

... The order of macromolecules depends largely on the primary structure and the segmental interaction of polymers It is well known that the chain stiffness of polymers offers a method of controlling ... These jacketed polymers often show liquid crystalline properties and allow the creation of highly ordered architecture Polymacromonomers can also be considered as a kind of jacketed polymers, in ... Synthesis of polymers The polymers were synthesized through radical polymerization from the appropriate monomers The concentration of initiator AIBN was 0.5 mol % based on the amount of the monomer...

Ngày tải lên: 16/09/2015, 17:11

... properties of the final polymer While the ring-opening polymerization of l,ldilactide or d,d-dilactide leads to isotactic polymers, the polymers of the rac-dilactide should consist mainly of isotactic ... Simulation of Microbial Depolymerization Processes of Xenobiotic Polymers 283 Masaji Watanabe and Fusako Kawai Introduction 283 Analysis of Exogenous Depolymerization 284 Modeling of Exogenous ... Analysis of Endogenous Depolymerization 295 Modeling of Endogenous Depolymerization 295 Analysis of Enzymatic PLA Depolymerization 300 Simulation of an Endogenous Depolymerization Process of PLA...

Ngày tải lên: 04/10/2012, 13:52

... total amount of pravastatin entrapped in 0.1 ml of the final packed erythrocytes Efficiency of entrapment The percentage of the loaded amount of pravastatin to the total amount of that added ... ml eppendorff tubes, 400 µl of suspension are added to 400 µl of PBS containing the known concentration of the drug and 2.5 mmol of ATP, 2.5 mmol MgCl2 and 2.5 mmol of CaCl2, gently mixing to ... percentage ratio of the hematocrite value of the final loaded cells to that of the initial packed cells, both measured using equal suspension volumes In vitro characterization of pravastatin loaded...

Ngày tải lên: 25/10/2012, 11:10

... (Yoto et al., 1996) The sensitivity of this PCR assay allowed detection of as few as 10 copies of B19 genome In addition, we sequenced the B19 isolates consisted of 4561 bp covering NS1, VP1 and ... Discussion The etiology of hepatitis remains obscure in 3-10% of cases in Europe [5] and the United States [6] and up to 30% of cases in Asia [7, 8] Particularly, the cause of fulminant hepatitis ... National Study Group of Fulminant Hepatitis Clinical epidemiology of fulminant hepatitis in Japan before the substantial introduction of liver transplantation: an analysis of 1309 cases in a 15-year...

Ngày tải lên: 26/10/2012, 10:03

... processing of auditory information over 200-ms time frames [17] A comparison of the effects of different auditory stimulus deviation types on the MMN component has been determined through a number of ... stimulus variation types Despite a relatively recent growth of interest in N2b characterization, a number of studies have probed the effect of stimulus and experimental condition variations on this ... notable that the detection of a frontal N2 is associated only with instances of a NOGO response Thus, the P300 appears to be inhibited by the appearance of the N2b in tasks of motor activity suppression...

Ngày tải lên: 02/11/2012, 11:08

... lx) First of all, consumers were briefed on the concept of the methodology and the procedure The aim of this was to allow for development of the vocabulary to describe the four types of dry-cured ... 55.58% of the Table Demographic, socio-economic characteristics and frequency of dry-cured ham consumption of the participants (% of respondents, n = 109) Socio-demographic characteristic % of respondents ... product To summarize, FCP offers the possibility of assisting the demands of marketing and product development teams who require information on target consumer’s perception of products, rather than...

Ngày tải lên: 03/04/2013, 21:07

... polysaccharide One milligram of the partially purified polymer contained 309.7 µg of protein, 160.2 µg of neutral sugar, 58.5 µg of hexosamine, 30.8 µg of uronic acid and 3.8 µg of phosphorus Constituent ... concentration of ppm to estimate the effect of pH After min, A660 was measured and the extent of flocculation was calculated Pronase digestion of extracellular polymer Forty milligrams of the extracellular ... the aqueous phase A total of 274.8 mg of crude extracellular polymer was obtained from 600 ml of activated sludge by sonication for 10 Figure 1A shows the elution profile of the crude extracellular...

Ngày tải lên: 05/09/2013, 09:08

... the anaerobic tank The characteristics of the influent wastewater were as follows: 160–200 mg/L of SS, 55–80 mg/L of TOC, 45–55 mg/L of T-N, and 4.0–5.5 mg/L of T-P Other details are shown in the ... volume of 20 L, received excess sludge from the anoxic tank, and the amount of sludge was adjusted to 9.4 % of total MLSS per day Ozonation was performed twice a week, and then the supernatant of ... conditions (use of nitrogen gas and addition of 20 mg-N/L NaNO3 to the cup) The PUR was estimated from the slope of the line describing the linear decrease in phosphate concentration The ratio of anoxic...

Ngày tải lên: 05/09/2013, 09:38

... from that of the roots and rhizomes For example, the δ13C of HCO3- is higher than δ13C of CO2 in sea water Characteristics of fatty acid structure in Z japonica We found about 30 kinds of fatty ... characteristics of carbon stable isotope and fatty acid structure of Z japonica Furthermore, we compared the characteristics of carbon stable isotope and fatty acid structure of Z japonica with those of the ... about -10‰ These results suggest that δ13C of Z japonica tend to be lower than the δ13C of some kinds of seagrass such as Z marina We consider that the δ13C of Z japonica became lower than Z marina...

Ngày tải lên: 05/09/2013, 10:17

... hydrophobic property of PS polymer promoted the formation of these polymer aggregates As can be seen, the thermally induced polymerization of styrene, as well as the blending of PS and SPS polymers, causes ... uptake of the PVDF membrane decreasing from 22.05% to 14.31%, which can explain the hydrophobic property of PS polymer However, the water uptake of PVDF-SPS membrane is larger than that of the ... compartment (mol.L-1) VB is the volume of right reservoir (cm3) A and L are the membrane cross-sectional area and thickness, respectively α is the slope of the linear plot of methanol concentration in...

Ngày tải lên: 05/09/2013, 16:11

... of organic acid and reduced levels of ammonia after compost processing [41, 42] Table Characterization of yard waste compost samples Specifications YWCa-I YWC-II Location Bottom of heap Top of ... microbial community The focus of this work was on the characterization of cellulose- and xylan-degrading enzymes from a thermophilic microbial consortium obtained by enrichment of yard waste compost ... Hackensack, NJ) During extrusion, a screw speed of the extruder of 100 rpm and a barrel temperature of 100°C was maintained [28] 2.3 Sample collection Samples of yard waste compost (YWC) and finished...

Ngày tải lên: 05/09/2013, 16:11