sans small angle x ray scattering saxs and transmission electron microscopy tem
Báo cáo y học: "Application of Small Angle X-ray Scattering (SAXS) for Differentiation between Normal and Cancerous Breast Tissue"
... Elshemey WM Low angle X- ray scattering from spices Radiation Physics and Chemistry 2002; 64: 267-271 Evans SH, Bradley DA, Dance DR, Bateman JE, Jones CH Measurement of small angle photon scattering ... Evaluation of optimum scattering angle - In order to obtain the optimum scattering angle, the diffraction profiles of a test adipose sample were measured over a range of scattering angles from 4° to ... lobular carcinoma and in-situ ductal carcinoma studied in this work is referred to as glandular tissue Therefore, it is expected different peak positions will exist for carcinoma and fibrocystic...
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Tài liệu Báo cáo Y học: The solution structure and activation of visual arrestin studied by small-angle X-ray scattering pot
... theoretical scattering from a model and the experimental data: N X IðSj Þ À Iexp ðSj Þ 2 v2 ¼ ð8Þ N À j¼1 rðSj Þ where for each momentum transfer value, Sj, I(Sj) is the theoretical scattering, Iexp(Sj) ... solution X- ray scattering These pieces were modelled into the AA and BD dimers as extended polypeptide [26], and produced an improvement in the fit of the AA model at S values between 0.15 and 0.2 ... display for synchrotron radiation experiments: hardware and software Nucl Instrum Methods A249, 399–407 21 Guinier, A & Fournet, G (1955) Small Angle Scattering of X- rays Wiley, New York 22 Svergun,...
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Growth and transmission electron microscopy studies of nanomaterials 1 2
... chemical and electronic structure information The commonly used techniques for microanalysis in TEM are Energy Dispersive X- ray Spectroscopy (EDX) and Electron Energy Loss Spectroscopy (EELS) EDX is ... lens system, a magnification system, a data recording system, a chemical analysis system and a vacuum system [1] A diagram of a simple one-lens TEM is given in figure 2.1 Specimen Ψ (x, y) θ R ... front and rear regions appear in hexagonal arrays, which match the diffraction pattern of the hexagonal WS2 structure The two hexagonal arrays are rotated away from each other by ca 17° and are...
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Growth and transmission electron microscopy studies of nanomaterials 3 4
... before (lower) and after (upper) exposure to NH3, showing the B 1s and N 1s K-edges, and a notable absence of carbon TEM observation of the particles revealed excellent size uniformity, and figure ... Figure 4.2 XRD of ZnS nanowires A glancing angle XRD spectrum is shown in figure 4.2 Except for three Au crystal peaks, all the other peaks in the XRD spectrum can be indexed to the ZnS hexagonal ... semiconductor compound with a direct and wide band-gap of 3.37 eV and an exciting binding energy of 60 meV at room temperature [3] Promising ultraviolet lasing action and a low power threshold for optical...
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Growth and transmission electron microscopy studies of nanomaterials 5 7
... Largest difference map peak and hole, (e.Å-3) 0.791 and -0.799 0.438 and -0.467 6957 / 21 / 392 TG and DTA reveal that the compounds and start decomposing at 80-130 ˚C and the residual weight when ... High-resolution TEM image and (b) corresponding selected area diffraction pattern TEM provides further insight into the structure of this film Figures 6.5(a) and 6.5(b) show a high resolution TEM image and ... From the XPS spectra, contamination by oxygen, nitrogen and carbon are inevitable on the films due to the organic ligand employed in the reaction For thin films deposited at 300 and 400 ˚C, XPS analysis...
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Báo cáo khoa học: X-ray crystallography, CD and kinetic studies revealed the essence of the abnormal behaviors of the cytochrome b5 Phe35fiTyr mutant pdf
... in temperature It is known from X- ray structural analysis of wild-type cyt b5 [21] that the core consists of b-strand III (Tyr27–Leu32), b-strand II (Thr21–Leu25), b-strand I (Lys5–Tyr7) and ... A.T (1992) X- PLOR: a System for X- Ray Crystallography and NMR Version 3.1 New Haven: Yale University Press 26 Brunger, A.T Adams, P.D Clore, G.M et al (1998) Crystallography and NMR System (CNS): ... grateful to Prof Li-Wen Niu, Prof Mai-Kun Teng and Dr Xue-Yong Zhu of the University of Science and Technology of China for their support and help with the X- ray data collection 18 REFERENCES Spatz,...
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handbook of x ray spectrometry revised and expanded by rene van grieken
... f14 x; ZÞ ¼ f13 x3 ; ZÞ x ; x x x4 x3 where < f21 x; ZÞ ¼ a expðÀb1 x þ ðZ À aÞ expðÀcxÞ; x x1 x x x2 F2 x; ZÞ ¼ f22 x; ZÞ ¼ f21 x1 ; ZÞ exp½Àb2 x1 À x ; : f23 x; ZÞ ¼ f22 x2 ; ZÞ exp½Àb3 ... calculate F (x, Z): x x1 > f11 x; ZÞ ¼ a expðÀb1 x þ ðZ À aÞ expðÀcxÞ; > > < f12 x; ZÞ ¼ f11 x1 ; ZÞ expðÀb2 x1 À x ; x x x2 ð74Þ F1 x; ZÞ ¼ f13 x; ZÞ ¼ f12 x2 ; ZÞ exp½Àb3 x2 À x ; x x x3 > ... calculating S (x, Z ) has recently been proposed by Szaloki (1996): X > < s1 x; ZÞ ¼ di ½exp x À 1i ; x xi S x; ZÞ ¼ i¼1 > : s2 x; ZÞ ¼ ½Z À s1 x; ZÞ À t2 g1 x þ t2 g2 x þ s1 x1 ; ZÞ x1 < x ð66Þ...
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ANOMALOUS X-RAY SCATTERING FOR MATERIALS CHARACTERIZATION pot
... non-crystalline system can be determined from diffraction data with X- rays, neutrons and electrons The X- ray case is discussed below as an example, although many of the concepts and procedures Experimental ... B-site and the positions occupied by oxygen (O): Fhkl = fA exp[BA (sin θ/λ)2 ] exp[2πi(hxj + kyj + lzj )] A + fB exp[BB (sin θ/λ)2 ] exp[2πi(hxj + kyj + lzj )] (3.9) B + fO exp[BO (sin θ/λ)2 ] exp[2πi(hxj ... micro-electronics With remarkable progress in such fields, X- ray optical methods such as grazingincidence X- ray diffraction (GIXD) and grazing X- ray reflectometry (GXR) A Brief Background of Current Requirements...
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Báo cáo khoa học: "Site adaptations of Acanthogyrus (Acanthosentis) tilapiae: Observations through light and scanning electron microscopy" pptx
... ,lakssroF( suniretag sucinyhrotcelP tnurg dettopskcalb eht gnitcefni )eadiloboxyM :aeropsoxyM( ps n mumots suloboxyM fo seiduts cipocsorcim nortcele dna thgiL F raffahG -ledbA ,R htoreztnE ,T ... skooh gnol ehT )D1 giF( skooh xis gnissessop gnir hcae ,roiretsop eht sdrawot detneiro skooh devruc fo sgnir eerht yb deziretcarahc dna )C&B2 giF( esab eht ta retemaid ni mm 030.0 ± 093.0 dna ... fo tnemhcatta fo tniop a yb dewollof sicsoborp eht fo esab eht ta stsixe noilgnag worran A htgnel ni mm 300.0 ± 710.0 yletamixorppa erusaem dna ,eno tsrif roiretna eht fo naht rellams era gnir...
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Direct observations of nickel silicide formation on (100) si and si0 75ge0 25 substrates using in situ transmission electron microscopy
... incident electrons and a specimen A number of interactions take place Transmission electron microscopy (TEM) uses unscattered, inelastically scattered, and narrow -angle elastically scattered electrons ... 29 Principles of transmission electron microscopy 32 3.1 Introduction to transmission electron microscopy 32 3.2 Important electron interactions with the sample in TEM 33 3.3 Diffraction ... Selected area electron diffraction Salicide Self-aligned silicide Si Silicon SiGe Silicon germanium alloy xvi SiO2 Silicon dioxide SPE Solid phase epitaxy TEM Transmission electron microscope/microscopy...
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Direct ray tracing for low energy electron microscopy
... energy electron microscopy and mixed field objective lens 1.2 Direct Ray Tracing 1.3 Low voltage scanning electron microscopy 1.4 Time of flight electron emission microscope and ... particle's coordinates (x, y, z) and velocity components (vx , vy , vz): dx v x , dt dv x q E x v y B z v z B y , dt m 2.2a dy v y , dt dv y q E v z B x v x B z , dt m y 2.2b ... adequately understand secondary image and spectrum formation in mixed field immersion lenses for low energy electron microscopy system 1.4 Time of flight electron emission microscope and drift tube...
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Tài liệu Characterization of the Polymorphic Behavior of an Organic Compound Using a Dynamic Thermal and X-ray Powder Diffraction Technique pptx
... scanning calorimetry (DSC); X- ray powder diffraction (XRPD); combined, simultaneous, and dynamic differential scanning calorimetry /X- ray powder diffraction (DSC/XRPD); and high performance liquid ... of Mixtures of Polymorphs and Potential New Solids Forms By using the combined and dynamic DSC/ XRPD, several mixtures of disodium salt samples were identified, and the components of these mixtures ... mixture of hydrated Forms I and IV (sample 8) Figure 31 DSC of mixture of Form III monohydrate and Form IV hydrate (sample 56) Figure 32 Superimposed XRPD of mixture of Form III monohydrate and...
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Tài liệu Báo cáo khoa học: X-ray crystallographic and NMR studies of pantothenate synthetase provide insights into the mechanism of homotropic inhibition by pantoate docx
... the quality of the electron density maps and facilitate further rebuilding and improvement of the molecular model, until no unexplained electron density remained, and the Rcryst and Rfree values ... form of nPS using X- ray crystallography, as described below A Solution and refinement of the structure using X- ray crystallography B The crystal structure of the pantoate–nPS complex was solved by ... backbone and side chain 13Ca and 13C¢ and 13Cb carbons are assigned to the extent of 97%, 93% and 93%, respectively (BMRB accession number 6940) [24] The H–15N correlation in the TROSY experiment...
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Tài liệu Báo cáo khoa học: Destabilization of psychrotrophic RNase HI in a localized fashion as revealed by mutational and X-ray crystallographic analyses pdf
... residues 29, T34 and E131 are shown The hydrogen bonds between N29 and Oc and T34 and Oc, and between N29 and Nd and E131 and Oe2, in the wild-type protein are shown as green broken lines, and the ion ... the protein, and a and b represent the a helix and b strand, respectively The side-chains of the mutated and parent amino acid residues at the six mutation sites are shown D39 ⁄ G39 and M76 ⁄ V76 ... 6·-RNase HI and wild-type proteins (full line) and between molecules C and D (broken line) a Helices and b strands are indicated by bars helices, and around Gly128 in a loop between the aV helix and...
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Tài liệu Báo cáo khoa học: Molecular determinants of ligand specificity in family 11 carbohydrate binding modules – an NMR, X-ray crystallography and computational chemistry approach doc
... when the complex is formed The ligands cellobiose, cellotetraose and cellohexaose were studied Results and Discussion The crystal structure of CtCBM11, the binding cleft and its ligand specificity ... in the X- ray structures of CBM4 and CBM17 complexed with cellopentaose and cellohexaose, respectively [13,23] The involvement of the tyrosine residues in the stabilization of the complex cannot ... two six-stranded anti-parallel b-sheets that form a convex side (b-strands 1, 3, 4, 6, and 12) and a concave side (b-strands 2, 5, 7, 8, 10 and 11) The concave side is decorated by the side chains...
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Báo cáo khoa học: Determination of thioxylo-oligosaccharide binding to family 11 xylanases using electrospray ionization Fourier transform ion cyclotron resonance mass spectrometry and X-ray crystallography pot
... decreased in the series b-d-xylohexaose (Xyl6) > b-d-xylopentaose (Xyl5) > b-d-xylotetraose (Xyl4) > b-d-xylotriose (Xyl3), with no detectable afnity for b-d-xylobiose (Xyl2), which is consistent ... (Da)a TRX I (none) None S-Xyl2-Me S-Xyl3-Me S-Xyl4-Me S-Xyl5-Me None S-Xyl2-Me S-Xyl3-Me S-Xyl4-Me S-Xyl5-Me None S-Xyl2-Me S-Xyl3-Me S-Xyl4-Me S-Xyl5-Me 19046.920 n.b 19508.080 19656.081 19804.091 ... FEBS J Janis et al ă Thioxylo-oligosaccharide binding to xylanases Fig MS titration curves for TRX I (5 lM), TRX II (10 lM) and CTX (10 lM) with S-Xyl5-Me, S-Xyl4-Me and S-Xyl3-Me (initial concentrations...
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Báo cáo khoa học: The effect of replacing the axial methionine ligand with a lysine residue in cytochrome c-550 from Paracoccus versutus assessed by X-ray crystallography and unfolding ppt
... structure and unfolding upon replacing the axial Met ligand with a Lys in the M100K variant of cyt c-550 from P versutus We describe three X- ray structures, one of the ferric wild type (wt) and two ... identical geometry and coordi2445 X- ray and unfolding studies of cyt c-550 J A R Worrall et al Table Hydrogen bonding interactions involving buried water molecules (w) and the carboxylates of the ... of the electronic absorption band at 623 nm at pH 4.5 (B) The peroxidase activity, pH 4.5 and (C) peroxidase activity at pH 7.0 Data for the ferric wt protein is included for comparison, and all...
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Báo cáo khoa học: High-pressure effects on horse heart metmyoglobin studied by small-angle neutron scattering pdf
... 4654 Guinier, A & Fournet, G (1955) Small- Angle Scattering of X- Rays J Wiley & Sons, New York, USA Ibel, K & Stuhrmann, H.B (1975) Comparison of neutron and X- ray scattering of dilute myoglobin solutions ... optical path length was mm and the maximum forward scattering angle hmax ẳ 15 A separator between the pressurizing uid and the sample prevented the latter from contamination A hand driven pressure generator ... neocarzinostatin by small- angle neutron scattering and dierential scanning calorimetry Biochemistry 40, 39583966 47 Seemann, H., Winter, R & Royer, C.A (2001) Volume, expansivity and isothermal compressibility...
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Báo cáo Y học: Determinants of the inhibition of a Taiwan habu venom metalloproteinase by its endogenous inhibitors revealed by X-ray crystallography and synthetic inhibitor analogues pdf
... superfamily of metzincin which exhibits some typical structural features, such as the Met-turn and active-site consensus HExxHxxGxxH sequence [15–17] Some organisms and mammalian tissues recently ... the carbonyl oxygen of Arg106, as the side-chain carboxylic group of Asp (pKa ¼ 3.65) is deprotonated in our assay system (pH 8.0) On the other hand, the small Ala residue does not experience steric ... Huber, R & Bode, W (1995) X- ray structures of human neutrophil collagenase complexed with peptide hydroxamate and peptide thiol inhibitors Implications for substrate binding and rational drug design...
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Báo cáo Y học: Boar salivary lipocalin Three-dimensional X-ray structure and androstenol/androstenone docking simulations pot
... Docking experiment with androstenol and androstenone The previously identified natural ligands androstenol and androstenone have been built with the program ACD/CHEMSKETCH [18] The parameter and topology ... Stereoview of SAL X- ray structure in ribbon representation The helix is in red, strands are blue and turns or coil are yellow The GlcNAc residue bound to Asn53 is in white ball -and- stick, and the serendipitous ... the model of the complex of androstenol bound in SAL, with in (A) and (C) the ligand in position ÔinÕ, with the OH pointing inside the cavity and, in (B) and (D) the ligand in position ÔoutÕ,...
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