application of atomic force microscopy afm in polymer materials

... energy- transducing network. Protein packing may play a determining role in the formation of functional photosynthetic domains and membrane curvature. To further investigate in detail the packing effects of ... functionalized invaginations of the intracyto- plasmic membrane containing the photosynthetic machinery. The most abundant protein complexes in the intracytoplasmic membrane are light-harvesting (LH) ... multitude of different packing configurations can be obtained within one preparation. AFM images allow the differences in protein packing and interaction within the membrane to be visualized. Within...

Ngày tải lên: 18/02/2014, 18:20

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Ngày tải lên: 22/06/2014, 01:20

... exhibiting minor variations are shown in Fig. 4A. The small differences in topography of the individual V-PPases in A B D C Fig. 2. AFM analysis of purified V-PPase. (A) Three-dimensional AFM image of ... quantitation of microgram quantities of protein utilizing the principle of protein dye binding. Anal Biochem 72, 248–254. 39 Rea PA & Turner JC (1990) Tonoplast adenosine triphosphatase and inorganic ... with atomic force microscopy. FEBS Lett 504, 194–199. 17 Yuan C & Johnston LJ (2001) Atomic force microscopy studies of ganglioside GM1 domains in phosphatidyl- choline and phosphatidylcholine/cholesterol...

Ngày tải lên: 16/03/2014, 02:20

... of Medicine, Shinjuku-ku, Tokyo, Japan We report here the direct evidence for the formation of alternative DNA structures in a plasmid DNA, termed pTIR10, containing a 0.23-kb pyrimidine/purine-biased (Pyr/Pur) ... H-DNA; intramolecular triplex DNA; poly- pyrimidine/ polypurine sequence. There is a wealth of evidence indicating that short pyrimidine/purine-biased (Pyr/Pur) mirror symmetry sequences adopt an intramolecular ... timing through the pausing or stalling of DNA polymerase, as they are often observed in the regions where replication timing switches [9]. The barrier region for replication-fork movement in...

Ngày tải lên: 31/03/2014, 23:20

... kinase (PI3 kinase)/Akt, and NF- kappaB pathways in the process of D C maturation. PI3 kinase/Akt signaling pathways are important in maintain- ing survival of L PS-stimulated DCs. Inhibiting p38 MAPK ... induced by tip contamination in dynamic force mode atomic force microscopy. Rev Sci Instrum 2007, 78:023701-023706. 35. Gan Y, Franks GV: Cleaning AFM colloidal probes by mechanically scrubbing ... next interaction of the tip with the cells. Therefore, contamination control of AFM tips is very important for reliable AFM ima ging and surface/inter- face force measurements. Most contaminants...

Ngày tải lên: 21/06/2014, 02:20

... means of conductive probe atomic force microscopy (CP -AFM) , we characterize at room tem- perature CNTs by electrical imaging in order to measure their local resistance. The key requirements allowing ... mixture of ferrocene and xylene (as carbon source) was obtained by heating up to 750°C for 10 min. By thermal oxidation, the amorphous carbon struc- ture was eliminated at 300°C during 1 h 30 min in ... 6:335 http://www.nanoscalereslett.com/content/6/1/335 Page 3 of 10 NANO EXPRESS Open Access Evaluation of the nanotube intrinsic resistance across the tip-carbon nanotube-metal substrate junction by Atomic Force Microscopy Maguy Dominiczak 1,2 ,...

Ngày tải lên: 21/06/2014, 04:20

... Access Optimizing atomic force microscopy for characterization of diamond-protein interfaces Bohuslav Rezek † , Egor Ukraintsev *† and Alexander Kromka † Abstract Atomic force microscopy (AFM) in contact ... friction and wear of a polymer thin film using the atomic force microscope. J Mater Res 2001, 16:1487-1492. 31. Li G, Burggraf LW: Controlled patterning of polymer films using an AFM tip as a nano-hammer. ... the Moscow State University in a group of Dr. Igor Yaminsky on the AFM study of aggregation of polymers on different substrates. During his PhD he spent 1 year in a group of Prof. Yuri Lyubchenko at...

Ngày tải lên: 21/06/2014, 04:20

... Initial stages of sputtering on Au(111) as seen by scanning tunneling microscopy. Appl Phys Lett 1991, 59:1696. 53. Wasa K, Kitabatake M, Adachi H: Thin Film Materials Technology-Sputtering of Compound ... of Compound Materials Norwich: William Andrew Publishing-Springer; 2004. doi:10.1186/1556-276X-6-112 Cite this article as: Ruffino et al.: Atomic force microscopy investigation of the kinetic growth ... demonstrated, describing their kinetic growth mechanism. In particular, the cluster- ing kinetic process has been interpreted by classical mod- els involving surface diffusion-limited ripe ning of three- dimensional...

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Ngày tải lên: 07/09/2013, 13:08

... be thinking routinely in terms of integrated air opera- tions with other services in the same battlespace. For example, the new vision, instead of focusing on defense against massed waves of Soviet ... blending Marine F/A-18A and C squadrons into Navy carrier air wings as a matter of standard practice. 6 Finally, in the realm of doctrine, there was an emergent Navy acceptance of the value of ... A-7K aircraft in various large -force training exer- cises, including four Red Flag evolutions, that included Navy and Marine Corps participation; six adversary training sorties in the TA- 4J...

Ngày tải lên: 17/02/2014, 23:20

... scale of some minutes. As in the cases described in Subheading 3.1.2., a soft lever (k N < 0.01 N/m) in combination with a low applied force (<1 nN) will enhance information arising from ... Press Inc., Totowa, NJ Analysis of Human Fibroblasts by AFM 59 3.2.3. Analysis of Cell Dynamics As mentioned in Subheading 1., the AFM is uniquely capable of tracking the temporal evolution of systems ... reached a stage of relative maturity (4). The principal merit of the AFM is as a nonintrusive local probe of live cells and their dynamics in the biofluid envi- ronment. As well as offering high spatial...

Ngày tải lên: 11/04/2014, 02:07

... data MIN_VAL: Min value of data TFmax: Max of transformation function TFmin: Min of transformation function OV: Original Value Application Application Training Training Training tunes a neural ... training, and testing. CONTENT CONTENT Introduction Introduction Steps in data forecasting modeling Steps in data forecasting modeling using neural network using neural network Determine ... employed in training the network. The test set, often includes 10% to 30% of training set, is used in testing the generalization. And the verification set is set balance between the needs of enough...

Ngày tải lên: 28/04/2014, 10:18

... size of the width increased faster than that of the depth. According to Ogino’s report, the depth of the groove increased linearly, while the width of the groove was unchanged. The linear increase ... rapidly using an inexpensive AFM tip. Figure 4 Eff ects of the number of scratch or scan cycle. (a) The AFM image s of the scratches at 10 μNofappliedforceand1μm/s of scratch speed in the forward ... combination of nano-imprint system. AFM scratching technique takes advantage of the ability of moving a probe over a sample surface in a controllable way. By controlling the applied normal force...

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