craniovertebral joints and ligaments x ray of atlas and axis
Báo cáo y học: "Application of Small Angle X-ray Scattering (SAXS) for Differentiation between Normal and Cancerous Breast Tissue"
... 17 mixed (adipose plus fibroglandular) normal tissues, 41 carcinoma and 21 fibrocystic changes Effects of storage – In order to study the effects of tissue storage upon the diffraction profiles ... CRM, Hufton AP and Dance DR Breast cancer diagnosis using scattered X- rays J Synchrotron Rad 2000; 7: 348-352 Malden CH, Speller RD, et al A CdZnTe array for the detection of explosives in baggage ... are 0.33, 0.36, 0.46 and 0.4 nm for carcinoma, fibrocystic changes, adipose and fibroglandular tissues respectively Comparison of the measured signatures between the fresh and frozen tissues is...
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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
... Figure 30 DSC of 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 ... II melt of Form II Form I to Form II melt of Form II loss of water melt of Form I Form I to Form II melt of Form II loss of water melt of Form III melt of Form VI loss of water melt of amorphous ... 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...
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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
... pantoate-bound 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 ... superposition of chain A of E coli PS (1IHO.pdb) on the A-chain and B-chain of nPS in the region of the HXGH (34–37) motif (where X = Asp for E coli PS and Glu for M tuberculosis and A thaliana ... residues via networks of water-mediated hydrogen bonds The backbone nitrogen and carbonyl oxygen of Thr29 and the side chain oxygen of Ser54 are hydrogen-bonded to the O4 atom of pantoate via a network...
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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
... (A), N and C represent the N- and C-termini of 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 ... DG(H2O) and Cm values of the 5·-RNase HI protein were higher than those of the wild-type and 4·-RNase HI proteins by 20.0 and 7.8 kJÆmol)1 and 2.3 and 0.9 m, respectively The DG(H2O) and Cm values of ... The specific activities of the 5·-RNase HI and 6·-RNase HI proteins were 65% and 43%, respectively, of that of the wild-type protein, and 93% and 66%, respectively, of that of the 4·-RNase HI protein...
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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
... 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 ... the binding pocket of CtCBM11 and identify which atoms of the ligand and of CtCBM11 interact preferentially Calculations were performed with cellobiose, cellotetraose and cellohexaose carbohydrates ... Asp128 and Asp146 amino acids and, in the case of the larger ligands, with Asp51 as well Most of the hydrogen bonds occur via the hydroxyl groups associated with the C2 and C6 carbon atoms of each...
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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
... gD ð7Þ where fM and fD are the mass fractions of monomer and dimer, respectively, and RgM and RgD are the radii of gyration for the monomer and dimer, respectively Missing pieces of crystallographic ... region extended to approximately S ¼ 0.08 nm)1 (Fig 1) Radius of gyration, model fitting and analysis For a mixture of monomeric and dimeric scattering species, the radius of gyration is given by: ... concentrations of monomer and dimer, respectively The Kd can also be expressed in terms of the total mass concentration of protein, [arrestin]total (in mgÆmL)1), the mass fraction of monomer, fM, and the...
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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
... states of the CTXS-Xyl2-Me complex were not detected with [S-Xyl2-Me]initial ẳ 5200 lM) Protein (modications) Inhibitor Mexp (Da)a TRX I (none) None S-Xyl2-Me S-Xyl3-Me S-Xyl4-Me S-Xyl5-Me None S-Xyl2-Me ... calorimetry of both domains 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), ... CTXS-Xyl5-Me complex are summarized in Table Atomic co-ordinates for the crystal structures of TRX I, TRX II, CTX, and CTXS-Xyl5-Me complex can be found Table X- ray diffraction measurement and renement...
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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 of ... R Worrall et al X- ray and unfolding studies of cyt c-550 Fig Close up of the heme binding pocket of (A) wt and (B) the M100K(rt) variant of ferricyt c-550, with the positions of the buried water ... unfolding of the M100K variant involves the breaking of the Lys-Nf-iron bond coupled with the dynamic process of ligand exchange It thus seems likely that the mechanism of release of the axial ligand...
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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
... Foundation of China We are 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 ... structures of the Phe35fiTyr mutant and of the wild-type protein as well as other mutants However, the conformation of the latter is flexible CD spectra of thermal denaturation of cyt b5 and its Phe35fiTyr ... (Tyr27–Leu32), b-strand II (Thr21–Leu25), b-strand I (Lys5–Tyr7) and a-helix I (Thr8– His15) Trp22, Tyr6, Tyr7, Tyr27 and Tyr30 are the main aromatic components of the core of cyt b5 The pattern of the absorption...
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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
... grouped in a 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 ... potencies of pEWN and pEWK (Table 3) Structural comparison of pENW-(TM-3) with the peptidic inhibitor-complexes of atrolysin C, TACE and HNC Fig Diagram of the active-site structure of TM-3 complexed ... Fig 2) His143 Ne2 and Wat416 are located at the vertexes of a distorted octahedron of cadmium ion at the active site, while His147 Ne2, His153 Ne2 and the two C-terminal oxygens of the inhibitor...
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Báo cáo khoa học: X-ray crystallography and structural stability of digestive lysozyme from cow stomach doc
... replacement of residue 21 could also be an adaptation to stabilize this region Experimental procedures Expression and purification of BSL2 In an Escherichia coli expression system, removal of an extra ... Matsuzawa H (1998) Crystallographic and mutational analyses of an extremely acidophilic and acid-stable xylanase: biased distribution of acidic residues and importance of Asp37 for catalysis at low ... (2001) Construction of an expression system of insect lysozyme lacking thermal stability: the effect of selection of signal sequence on level of expression in the Pichia pastoris expression system...
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Báo cáo khoa học: X-ray crystallographic and enzymatic analyses of shikimate dehydrogenase from Staphylococcus epidermidis pot
... amides of Asn58 and Asn85 The C4-hydroxyl group of shikimate interacts with the carboxylate group of Asp100 and with the side-chain amides of Asn85 and Lys64 The C3-hydroxyl group forms extensive ... information of substrate and cofactor, the structural basis underlying the cofactor specificity of AroE and YdiB [9], and the putative catalytic mechanism of SDH [12] Notably, the relative positions of ... unliganded enzyme structures, the crystallographic analysis of SDH in complex with cofactor, and of even ternary enzyme–cofactor–substrate complexes, shedsnew light on the catalytic mechanism and...
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Báo cáo khoa học: Structural function of C-terminal amidation of endomorphin Conformational comparison ofl-selective endomorphin-2 with its C-terminal free acid, studied by 1 H-NMR spectroscopy, molecular calculation, and X-ray crystallography pot
... 164 x, y,z x +1,y,z x +1,y,z 1 -x, y +1 ⁄ 2,-z x, y,z x, y,z x, y,z x, y,z x- 1,y,z 1 -x, y-1 ⁄ 2,1-z x, y,z x, y +1,z x, y +1,z x, y-1,z x, y-1,z x, y,z 1 -x, y-1 ⁄ 2,1-z x, y,z 1 -x, y +1 ⁄ 2,-z x, y +1,z x, y,z x, y-1,z ... x, y-1,z x, y,z x, y-1,z 3.024(4) 2.783(5) 3.016(4) 3.138(5) 3.021(5) 2.776(5) 3.273(5) 3.122(5) 2.814(4) 2.848(5) 3.221(4) 2.767(5) 3.083(5) x, y,z x, y,z 1 -x, y-1 ⁄ 2,-z 1 -x, y-1 ⁄ 2,-z x, y,z x, y,z x, y,z ... characteristics of EM2 and EM2OH in DMSO, TFE, H2O (pH 2.7 and 5.2) and DPC micelles (pH 3.5 and 5.2) Open and fold represent the conformations rS and n7 in parentheses indicate the reverse S- and numerical...
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handbook of x ray spectrometry revised and expanded by rene van grieken
... f12 x2 ; ZÞ exp½Àb3 x2 À x ; x x x3 > h ib4 > > : 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 ; ... combination of analytical functions to 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 ... ZÞ exp½Àb2 x1 À x ; : f23 x; ZÞ ¼ f22 x2 ; ZÞ exp½Àb3 x2 À x ; x x x3 Z ð75Þ where Z 100 The parameters for the calculation of F (x, Z ), including the critical values of x1 , x2 , ´ and x3 ,...
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the restless universe understanding x-ray astronomy in the age of chandra and newton oct 2002
... what an X ray is Unfortunately, the term X ray, so applied, refers to the piece of film illuminated by X rays Mention X- ray astronomy” to people and too often they think we send beams of X rays ... accumulation of X rays gradually exceeds the random arrival of background X rays X- ray astronomy needed a satellite that imaged X- rays In the late s, NASA launched a series of large satellites ... absorption of X rays produces We need telescopes and detectors, sensitive to X- ray light and launched on satellites above Earth’s atmosphere, to study the X- ray universe The Chandra X- ray Observatory,3...
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Báo cáo lâm nghiệp:"Predicting of oak wood properties using X-ray inspection: representation, homogenisation and localisation. Part II: Computation of macroscopic properties and microscopic stress fields" pdf
... 0; e xrr ( u s rt ñ = 0; e xrt ( u • s rr ñ = 0; e xtt ( u s rt ñ = 0; e xrt ( u ) = and ) = for a quartersawn board; ) = and ) = for a flatsawn board In each case, the missing part of e xkh (u ... asymptotic expansion in successive power of e: ui (x, y) = ui(0) (x, y) + eui(1) (x, y) + e2 ui(2) (x, y) + ì (0) ü = a ijkl í e ykl ( u ) ý î þ (1) 0 ¶ ¶ { a ijkl [ ( e ykl ( u ) ) + ( e xkl ( u ... Homogenisation and Localisation Part I: Digital X- ray imaging and representation by Finite Elements, Ann For Sci 59 (2002) 767–776 [6] Barkas W.A., The influence of ray cells on the shrinkage of wood,...
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Báo cáo khoa học: "Use of kilovoltage X-ray volume imaging in patient dose calculation for head-and-neck and partial brain radiation therapy" pptx
... three-month length of the stability test to be adequate The maximal difference in CBCT numbers was 21, with a maximum standard error of less than 1.5% The stability of kV-CBCT number and electron density ... difference of maximal dose in tumor is 0.49% and in normal structures are 3.15% Five out of six patients didn't show significant anatomy changes and setup variations between the first CBCT images and ... the indexes of patients, 1PTV means the PTV in patient1 Figure The transverse views of CT and the 2nd CBCT The transverse views of the reference CT (a) and cone beam CT (b) after two weeks of the...
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the spatial, spectral and polarization properties of solar flare x-ray sources
... using Soft and Hard X- ray Telescopes (SXR and HXR) on-board Yohkoh HXR contours are overlaid onto the SXR loop The positions of X- ray sources are discussed in Section 1.5.3 This image is taken and ... section, the main X- ray observables during a solar flare: the X- ray temporal evolution, the X- ray spectrum, the X- ray source location and spatial properties, and finally the X- ray polarization will ... scattered X- ray flux depends on many factors: the energy of the X- rays, the heliocentric angle of the X- ray emitter in the chromosphere, the height of the X- ray emitter above the photosphere and the...
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High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 1
... carbide XRD : x- ray diffraction HR-XRD : High-resolution synchrotron x- ray diffraction RSM : Reciprocal space mapping PLM : Polarized light microscope xx FWHM : Full-width-at-half-maximum ε’ ... Bellaiche et al [24] and the phenomenological theoretical work of Vanderbilt and Cohen [25] Subsequently, extensive structural studies by means of high-resolution synchrotron x- ray and neutron diffractions ... et al.) S: x = ([001]-poled) S: x = ([001]- and [111]-poled) S: x = 5, (unpoled) S: x =4.5, ([001]-poled) S: x = 4.5, ([001]-poled) S: x =8, 10 ([100]-,[011]-, and [111]-poled) P: 10 x 15 prepared...
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High resolution x ray diffraction study of phase and domain structures and thermally induced phase transformations in PZN (4 5 9)%PT 2
... surface Intensity (arb units) X- ray X- ray 44.62 42 43 44 45 o 46 47 2θ Figure 5.1 (002) XRD profiles of PZN-4.5%PT single crystal taken from (a) polished surface and (b) fractured surface A broad ... structure of the thin surface layer The experimental results pertaining to the origin of the broad lower 2θ peak adjacent to the major (002)R peak and the effects of surface layer on x- ray diffraction ... µm, 59 µm, and 412 µm of a PZN sample [57] This suggests a nonlinear relation between the x- ray energy and the penetration depth despite similar test samples were used Whether the x- ray diffraction...
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