structural studies of peptides on biomaterial surfaces using double quantum solid state nuclear magnetic resonance spectroscopy
Báo cáo khoa học: "Proton nuclear magnetic resonance spectroscopy based investigation on propylene glycol toxicosis in a Holstein cow" potx
... metabolites responsible for PGinduced toxicosis using proton nuclear magnetic resonance (NMR) spectroscopy Since it remains unknown which metabolites are responsible for a PG-induced toxicosis, a non-selective ... attractive Proton NMR spectroscopy, which in principle enables detection of all hydrogen-containing molecules, has turned into a commonly applied technique for metabolic profiling of biofluids, among other ... measurements just before collection of the main blood samples One extra arterial mL sample was obtained Table 1: Composition of pelleted concentrate1 Feedstuff Inclusion, % of concentrate (as mixed) WeiPass2...
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Báo cáo khoa học: Structural studies of nucleoside analog and feedback inhibitor binding to Drosophila melanogaster multisubstrate deoxyribonucleoside kinase doc
... further additions dC+ADP Hanging drops consisted of lL of crystallization solution containing 0.2 m K2SO4, 20% poly(ethylene glycol) 3350, pH 6.8 (Hampton Research PEG ⁄ Ion Screen condition #34), ... crystallization solution containing 20% glycerol AZT Hanging drops consisted of lL of crystallization solution containing 0.1 m MES, pH 6.5, 0.2 m Li2SO4 and 26% polyethylene glycol 2000 monomethylether ... drops consisted of lL of crystallization solution containing 0.1 m MES, pH 6.5, 0.2 m lithium citrate and 18% poly(ethylene glycol) 3350 added to lL of enzyme solution containing 10 mgÆmL)1 of protein...
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Báo cáo khoa học: Structural studies of thymidine kinases from Bacillus anthracis and Bacillus cereus provide insights into quaternary structure and conformational changes upon substrate binding pot
... mentioned above [14] They may have arisen because of crystal contacts Nevertheless, lack of electron density or highly diverse conformations when the phosphate donor is absent followed by formation ... formation of a b-hairpin in the presence of a phosphate donor indicates that this region of the molecule takes part in the creation of a phosphate donor–acceptor complex Residues at the tip of the ... are the ones that are observed in solution There are a number of structural indications that support this conclusion The interaction area formed between the b-sheets is larger than the one formed...
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Báo cáo khoa học: Structural studies of the capsular polysaccharide and lipopolysaccharide O-antigen of Aeromonas salmonicida strain 80204-1 produced under in vitro and in vivo growth conditions docx
... delivery of the sheath solution to the end of the capillary column The separations were obtained on 90-cm long bare fused-silica capillary using 10 mM ammonium acetate in deionized water pH 9.0, containing ... which three were later attributed to resonances from anomeric protons by direct correlation with corresponding 13C resonances in a 2D heteronuclear H)13C correlation HSQC spectrum Initial assignments ... excitation of H-5c and H-5b, respectively, permitting complete assignment of resonances for residues b and c (Table 1, Fig 2C,D) Assignments of 13C resonances were carried out by direct correlation of...
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Báo cáo hóa học: "Research Article The Effect of Cooperation on Localization Systems Using UWB Experimental Data" doc
... (number of configurations belonging to the condition over the total number of configurations considered) The characterization of the bias for 3,4, and walls is not reported because the number of measurements ... large, regardless of the propagation environment Although a detailed electromagnetic characterization of the environment is rarely available, rough classification of the environment is often feasible, ... target locations in the grid Clearly, a pair of devices can be in non-LoS (NLoS) condition depending on their relative locations within the topology of the environment MODELING OF THE RANGE MEASUREMENT...
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biochemical and structural studies of escherichia coli leucine-responsive regulatory protein
... and structural studies of Escherichia coli Lrp Transcriptional regulation of gene expression is an essential component for the life of any organism For uropathogenic Escherichia coli, expression ... 97 Mutation of Lrp and purification of truncation mutants… …97 Characterization of oligomerization state for LrpMN and LrpMC……………………… ……………………… ……100 Activity assays for truncation mutants………………… ... induction of the CpxAR response led to an increase in pap piliated cells, or promotion of the phase ON state (Hung et al., 2001) After more rigorous experimentation, it appears that production of...
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Structural studies of glycogen branching enzyme (GLGB) CRFE2alpha urucortin complexes
... combination of these operations When a molecule moves along a, b or c of the unit-cell, translational symmetry is applied In the rotational symmetry operation, only rotational angles of 60, 90, ... X-ray diffraction, mainly as an outcome of interaction between electromagnetic radiation and electrons of atoms 1.4.1 X-ray sources X-rays are electromagnetic radiation with a range of wavelength ... (Buerger, 1956) 1.2.4 Bragg’s law: the condition that produces diffraction Bragg’s law is a condition for diffraction by a crystal when electromagnetic radiation of a wavelength that is comparable...
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Synthetic and structural studies of copper, gold and palladium heterocyclic carbene complexes
... insertion87,105, trifluoromethylation,64 Ullmann-Arylation reaction,106 conjugate addition of carbonyl aziridination of aliphatic alkenes,107 oxidative carbonylation of amino 108 etc In addition, ... achieve both donor-type and acceptor-type bonding with similar bonding strength On the other hand, the dominant bonding mode of PH is the σ donation of the lone-pair electrons and thus it is only stable ... procedure as that for the mononuclear compound I-9.64 (Scheme 1.2) The sterical bulk of N-substituents in [Cu(OtBu)(NHC)] complex determines the dinuclear or mononuclear formation Dinuclear complexes...
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Structural studies of cysteine and serine protease inhibitors towards therapeutic applications
... attack on the substrate carbonyl carbon forming a tetrahedral transition state In the transition state, the carbonyl double bond of the substrate is reformed thereby breaking the peptide bond between ... the overall conclusion and future directions of these projects 12 List of Tables Page Table 1.1 Classification of proteases according to EC Recommendations Table 1.2 Classification of cysteine ... sequences of proteases and subsequently the number of families increased Only the sequence identity of portions of proteinases responsible for enzyme activity is considered for classification of families...
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ANALYTICAL STUDIES OF MORPHINE AND RELATED SUBSTANCES USING LC MSMS self studying
... effect ion suppression (37) The use of LC-MS/MS got more common for determination of morphine and its metabolites in plasma The sample preparation of choice was still solid phase extractions although ... resolution power Separation was achieved on an AQUITY UPLC HSS T3 2.1×100 mm, 1.8 µm with mobile phase consisted of mM ammonium formate and 0.2 % ammonia solution (25 %) Mobile phase B consisted of ... preparation consisted of hydrolysis by hydrochloric acid, automated solid phase extraction using Bond Elut Certify LRC 130mg from Agilent Technologies and formation of silyl derivatives The cut off...
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Region-specific effects on brain metabolites of hypoxia and hyperoxia overlaid on cerebral ischemia in young and old rats: a quantitative proton magnetic resonance spectroscopy stud pot
... the concentrations of selected metabolites, using proton magnetic resonance spectroscopy (1H-MRS), in two contrastingly different age-groups of animals: young - months old and aged - 24 months ... hyperoxia in two contrasting agegroups of rats, young and senescent, in which selected metabolites were quantified by means of proton magnetic resonance spectroscopy The ultimate goal of the present ... cognitive function Neurobiol Aging 2000, 2:257-269 Chang C, Chen GC, Jang T: A critical assessment of brain metabolites: analysis of perchloric acid extracts using proton nuclear magnetic resonance Neurosci...
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Spectroscopic studies of two dimensional carbon nanostructures and semiconductor quantum dots
... Determination Using Reflection and Contrast Spectroscopy 3.1 Introduction 23 3.2 Experimental 25 3.3 Results and discussion 27 3.4 Conclusion 36 3.5 References 37 Chapter Anisotropy of Electron-hole ... reemission of the radiation as the bond returns to its normal state This causes temporary polarization of the bond, and an induced dipole that disappears upon relaxation In a molecule with a center of ... Graphene Thickness Determination Using Reflection and Contrast Spectroscopy Chapter Graphene Thickness Determination Using Reflection and Contrast Spectroscopy 3.1 Introduction The recent success in...
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Báo cáo y học: " Impairment of chondrocyte biosynthetic activity by exposure to 3-tesla high-field magnetic resonance imaging is temporar" pptx
... Woodhouse S, Davidson C: Sulfation of chondroitin sulfate in human articular cartilage The effect of age, topographical position, and zone of cartilage on tissue composition J Biol Chem 1999, ... addition of 100 µl of fixation solution and incubation for hour at 20°C the samples were centrifuged at 300 g for 10 minutes The supernatant was discarded and 100 µl of the permeabilization solution ... expression on day (p < 0.05) Whereas the endogenous expression of IL-1β was decreased on day in the young group, the old group displayed a delayed response because IL-1β levels decreased on day of...
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Magnetic resonance spectroscopy correlation with histological analysis in gliomas and structure determination of a hypothetical protein
... proportionality of the integrated resonance intensity (I) and concentration (C) of nuclei giving the resonance: I=kC, where k is a constant (Leyden, 1977) With proper attention to experimental conditions, ... abbreviations 1D One-dimensional 2D Two-dimensional 3D Three-dimensional COSY Correlated spectroscopy ec314 Name of the protein HMBC Hetero -nuclear multiple bond correlation HRMAS High-resolution magic ... determining the structures of proteins by NMR is sequential resonance assignment, collection of conformational constraints and calculation of the 3D structure (Gerhard, 2000) First of all, an efficient...
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Báo cáo Y học: Structural studies on the core and the O-polysaccharide repeating unit of Pseudomonas aeruginosa immunotype 1 lipopolysaccharide pot
... assigned based on the coupling constant values and those for amino sugars by correlation of the protons at the nitrogen-bearing carbons to the corresponding carbons The configurations of the glycosidic ... the Hungarian National Collection of Medical Bacteria (National Institute of Hygiene, Budapest, Hungary) It ESI MS was performed using a Fourier transform ion cyclotron resonance (FT-ICR) mass ... result of postpolymerization nonstoichiometric modifications, such as O-acetylation, amidation or epimerization at C5 of uronic acids [3] The structures of the O-polysaccharides of all serologically...
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 1
... restricted on HOPG surfaces Repeating of structural motifs’ on a plane results in two-dimensional crystals (2D crystals) With the help of 2D crystal model, the derivation of the equations relating ... carbon rings of the second layer [4] Fig 1.1 Crystal structure of HOPG [4]: The graphite crystal is built up by layers with the honeycomb arrangement of carbon atoms being strongly covalently bonded ... breaking of the S-H bond and formation of the S-Metal bond Organosilane molecules can assemble onto silicon dioxide substrates through the reaction with the surface hydroxyl groups [14] to form a monolayer...
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 2
... It consists of scanning tip, piezoelectric controlled scanner, sample-to-tip control, and data processing component The direction of the electron flow depends on the sign of the applied bias on ... for viewing surfaces at the atomic level It probes the density of states of a material using tunneling current The basic design of the STM is shown in Fig 2.1 Based on the concept of quantum tunneling, ... EXPERIMENTAL Spectroscopy (EELS), can only provide spatially averaged information of the electronic structures of the surfaces Moreover, some of the techniques mentioned above require high-vacuum environment...
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 3
... finds useful applications such as the production and detection of sound, generation of high voltages, electronic frequency generation, microbalance, and ultra fine focusing of optical assemblies ... direction and horizontal direction Therefore the line containing the highest number of bright carbon atoms was selected for distance measurement The section analysis (Fig 3.4) of the distance profile ... order 41 CALIBRATION The calibration procedure consists of three steps Firstly, a calibration reference having surface features of precisely known dimensions is scanned These dimensions are compared...
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Studies of self assembled monolayers on highly oriented pyrolytic graphite using scanning tunneling microscopy and computational simulation 4
... within the range of hydrogen bonding Model A represented the configuration of phase-separated SAMs Model B represented the configuration of 64 PHYSISORPTION OF BINARY FATTY ACIDS ON HOPG phase-mixed ... Computational Simulations Computational simulations were carried out for structural modeling and adsorption energies calculations for binary acids that physisorbed on the HOPG surfaces In addition ... STM results, computational simulations can provide supplemental information about the configuration of two species within the 63 PHYSISORPTION OF BINARY FATTY ACIDS ON HOPG monolayers formed by...
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