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X-Ray Diffraction (1):
Recent article
X-Ray Diffraction
Abstract
The combined study of electron-density features in three substituted hydropyrimidines of the Biginelli compound family has been fulfilled. Results of the low-temperature X-ray diffraction measurements and density functional theory (DFT) B3LYP/6-311++G** calculations of these compounds are described....
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PMID: 21931212
PDF is available here.
PDF is available here.
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Acta Biomaterialia (7)10 2011
Abstract
Although Bioglass® has existed for nearly half a century its ability to trigger bone formation and tuneable degradability is vastly superior to other bioceramics, such as SiO(2)-CaO bioactive glasses. The sol-gel process of producing glass foams is well established for SiO(2)-CaO co...
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PMID: 21689791
PDF is available here.
PDF is available here.
Abstract
The present investigation concerns with the development and optimization of a bipolymeric delivery device for the treatment of colonic diseases. Prednisolone - a popular glucorticoid was used a model drug. The formulations were designed with an objective to deliver the drug to the large bowel with a...
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PMID: 21928719
PDF is available here.
PDF is available here.
Abstract
Open-ended, multi-wall carbon nanotubes (CNTs) with magnetic nanoparticles encapsulated within their graphitic walls (magCNTs) were fabricated by a combined action of templated growth and a ferrofluid catalyst/carbon precursor, and tested as drug hosts. The hybrid nanotubes are stable under extreme p...
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PMID: 21817779
PDF is available here.
PDF is available here.
Abstract
Day- and nighttime total suspended particulate matter was collected inside and outside Emperor Qin's Terra-Cotta Museum in winter and summer 2008. The purpose was to characterize the winter and summer differences of indoor airborne particles in two display halls with different archit...
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PMID: 22010376
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1814)9 2011
Abstract
In this research, the immobilization of superoxide dismutase (SOD) onto aminopropyl-functionalized KIT-6 [n-PrNH(2)-KIT-6] was investigated. This organo-functionalized mesoporous silica was prepared using a non-ionic surfactant and was fully characterized by XRD, nitrogen adsorption-...
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PMID: 21530691
PDF is available here.
PDF is available here.
Abstract
The ionization potentials of In(2)O(3) films grown epitaxially by magnetron sputtering on Y-stabilized ZrO(2) substrates with (100) and (111) surface orientation are determined using photoelectron spectroscopy. Epitaxial growth is verified using x-ray diffraction. The observed ionization potentials,...
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PMID: 21813943
PDF is available here.
PDF is available here.
Abstract
In the present study single-crystalline ZnO samples grown from the vapor phase, the melt, and a high-temperature aqueous solution (hydrothermal growth) are investigated before and after hydrogen plasma treatments, by means of deep level transient spectroscopy (DLTS) and high-resolution Laplace DLTS....
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PMID: 21813951
PDF is available here.
PDF is available here.
Abstract
CCL5 (RANTES) is a proinflammatory chemokine known to activate leukocytes through its receptor, CCR5. Although the monomeric form of CCL5 is sufficient to cause cell migration in vitro, CCL5's propensity for aggregation is essential for migration in vivo, T cell activation and apo...
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PMID: 21827949
PDF is available here.
PDF is available here.
Abstract
The mineral, organic and elemental composition of medicine clays from three shrines in the Tong Hills in northern Ghana (Gbankil, Kusanaab, and Yaane) are assessed to ascertain what additives they might contain and the implications for their recognition, for example in archaeological contexts. These...
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PMID: 21810043
PDF is available here.
PDF is available here.
Acta Biomaterialia (7)8 2011
Abstract
The objective of the present in vitro research was to investigate cardiac tissue cell functions (specifically cardiomyocytes and neurons) on poly(lactic-co-glycolic acid) (PLGA) (50:50 wt.%)-carbon nanofiber (CNF) composites to ascertain their potential for myocardial tissue engineer...
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PMID: 21571106
PDF is available here.
PDF is available here.
Acta Biomaterialia (7)8 2011
Abstract
We investigated the microstructures, Young's moduli, and tensile properties of metastable Ti-30Zr-(Cr, Mo) alloys subjected to solution treatment (ST) and cold rolling (CR). All the alloys comprise a β phase and small athermal ω phase, and they exhibit low Young's moduli after ST. During CR, defor...
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PMID: 21569873
PDF is available here.
PDF is available here.
Abstract
The intercalation of organic polymers molecules (i.e., PEGs and BRIJ) into a standard Ca-montmorillonite has been studied by XRD, TG, and IR spectroscopy. The polymer intercalation is confirmed by the increasing of the d(001) in XRD spectra as well as by the complex multisteps thermal decomposition b...
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PMID: 21630683
PDF is available here.
PDF is available here.
Abstract
We studied the phase transition behaviors of dipalmitoylphosphatidylcholine (DPPC) by differential scanning calorimetry, synchrotron X-ray scattering, Fourier transform infrared spectroscopy, and image analysis. We found that different parts (head, interface, and tail) of DPPC molecules all exhibit...
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PMID: 21634795
PDF is available here.
PDF is available here.
Abstract
Twelve new diterpenoids, isoadenolins A-L (1-12), and 24 known ones were isolated from the aerial parts of Isodon adenolomus. Their structures were identified using spectroscopic data, and the absolute configurations of 1 and 14 were determined by single-crystal X-ray diffraction. Selected compounds...
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PMID: 21534539
PDF is available here.
PDF is available here.
Abstract
In this study, a novel tissue engineering scaffold material of electrospun silk fibroin/nano-hydroxyapatite (nHA) biocomposite was prepared by means of an effective calcium and phosphate (Ca-P) alternate soaking method. nHA was successfully produced on regenerated silk fibroin nanofi...
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PMID: 21442728
PDF is available here.
PDF is available here.
Abstract
We discuss, production, characterization and in-vivo evaluation of nevirapine nanosuspensions. Laser diffraction showed that the average particles size was 457 nm. Following single-dose administration, the plasma gamma concentration profiles showed fast release. Macrophage uptake studies confirmed e...
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PMID: 21699078
PDF is available here.
PDF is available here.
Abstract
The solid state properties and dissolution behaviour of binary systems of mefloquine hydrochloride (MH) with betaCD were investigated. MH-betaCD interaction in the solution state was studied by phase solubility analysis and demonstrates the ability of 3CD to complex with MH giving AL type profile wit...
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PMID: 21699079
PDF is available here.
PDF is available here.
Abstract
A dinucleating macrocycle, H(2)PIM, containing phenoxylimine metal-binding units has been prepared. Reaction of H(2)PIM with [Fe(2)(Mes)(4)] (Mes = 2,4,6-trimethylphenyl) and sterically hindered carboxylic acids, Ph(3)CCO(2)H or Ar(Tol)CO(2)H (2,6-bis(p-tolyl)benzoic acid), afforded...
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PMID: 21682286
PDF is available here.
PDF is available here.
Abstract
We have determined the value of the glass transition temperature (T_{g}) as well as the steepness index (m_{P}) at various T-P conditions....
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PMID: 21728535
PDF is available here.
PDF is available here.
Abstract
T-shaped bolaamphiphiles composed of a biphenyl rigid core, a semiperfluorinated lateral chain, two polar 1,2-diol groups in the terminal positions and flexible alkyl spacers connecting the polar groups with the biphenyl core have been synthesized and investigated by polarizing microscopy, DSC and X-...
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PMID: 21534565
PDF is available here.
PDF is available here.
Abstract
We found unstable microscopic domains (compositional/phase fluctuations) in the absence of ceramide, and macroscopically separated fluid and gel phases upon addition of ceramide. We also observed phase fluctuations in the presence of ceramide within the broad phase transition regions. We compare our...
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PMID: 21539783
PDF is available here.
PDF is available here.
Abstract
Our investigations reveal that the structure and lateral ordering of the LPS molecules is very different from phospholipid systems and can be modulated by the ionic strength of the aqueous subphase in an ion-dependent manner. Our findings also indicate differential effects of monovalent and divalent...
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PMID: 21539784
PDF is available here.
PDF is available here.
Abstract
Dihydroartemisinin (DHA) is a poorly water-soluble drug that displays low bioavailability after oral administration. Attempts have been made to improve the solubility of DHA. Yet, no information is available concerning improved bioavailability. This study aimed to improve the water solubility of DHA...
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PMID: 21656361
PDF is available here.
PDF is available here.
Abstract
We show how mesenchyme-derived single stem cell populations can be induced to transdifferentiate in vitro in a structure similar to a dental bud. The presence of stem cells in the adipose tissue has been previously reported. We incubated primary cultures of human adipose tissue-derived stem cells in...
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PMID: 21514442
PDF is available here.
PDF is available here.
Abstract
We show how these peptides all permeabilize model bacterial membranes but not model eukaryotic membranes: defensins selectively generate saddle-splay ("negative Gaussian") membrane curvature in model membranes rich in negative curvature lipids such as those with phosphoethanolamine (PE) headgroups....
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PMID: 21473577
PDF is available here.
PDF is available here.
Abstract
In this study, Fe(3)O(4)/SiO(2)/TiO(2) photocatalyst was prepared via a sol-gel method, and Fe(3)O(4) particles were used as the core of the colloid. Diffraction peaks of Fe(3)O(4) crystals are not found by XRD characterization, indicating that Fe(3)O(4) particles are well encapsulat...
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PMID: 21695039
PDF is available here.
PDF is available here.
Abstract
The development of suitable biomimetic three-dimensional scaffolds is a fundamental requirement of tissue engineering. This paper presents the first successful attempt to obtain electrospun gelatin nanofibers cross-linked with a low toxicity agent, genipin, and able to retain the ori...
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PMID: 21095244
PDF is available here.
PDF is available here.
Abstract
This study addresses the oxidation of ammonia (NH3) at temperatures between 423 and 673 K by selective catalytic oxidation (SCO) over a copper-based, rare earth composite metal material that was prepared by coprecipitating copper nitrate, lanthanum nitrate, and cerium nitrate at various molar ratios....
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PMID: 21516940
PDF is available here.
PDF is available here.
Abstract
The growth of adenine on Au(111) from the submonolayer up to several microns film thickness is studied by combining STM and surface X-ray diffraction techniques. The study shows that adenine thin films are composed of highly textured crystallites with the reported α-adenine crystal structure in such...
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PMID: 21465630
PDF is available here.
PDF is available here.
Abstract
Electro-spun polyethylene terephthalate (PET) fibrous mats are potential substrates for biotechnological and biomedical applications. In this regard, substrate characteristics including, fiber diameter, orientation and mechanical properties play an important role in controlling the i...
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PMID: 21316622
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1808)8 2011
Abstract
We examine the interactions between a trehalose lipid from Rhodococcus sp. and dimyristoylphosphatidylglycerol membranes by means of differential scanning calorimetry, X-ray diffraction, infrared spectroscopy and fluorescence polarization. We report that there are extensive interactions between treh...
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PMID: 21600191
PDF is available here.
PDF is available here.
Annales d'Endocrinologie (72)2 2011
Abstract
Abstract
Both the composition and the thermal kinetics that are applied to processed cheeses can affect their texture. This study investigated the effect of the storage conditions and thermal history on the viscoelastic properties of processed cheese and the physical properties of the fat phase. The microstru...
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PMID: 21375320
PDF is available here.
PDF is available here.
Biochimica et Biophysica Acta (1808)8 2011
Abstract
The interaction of antipsychotic drugs (AP) with lipids and the subsequent lipid reorganization on model membranes was assessed using a combination of several complementary biophysical approaches (calorimetry, plasmon resonance, fluorescence microscopy, X-ray diffraction and molecular modeling). The...
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PMID: 21377444
PDF is available here.
PDF is available here.
Abstract
We analyze theoretically how the thickness of the covering water layer influences the structural and orientational information contained in the recorded diffraction images. This study has implications for planned experiments on single-particle imaging with XFELs....
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PMID: 21517525
PDF is available here.
PDF is available here.
Abstract
To study the dispersivity of baicalin solid dispersion by Raman spectrometry and infrared spectrometry in order to obtain a new and simple method in examining the dispersivity of solid dispersion.
Baicalin solid dispersion was prepared by solvent method. The Raman spe...
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PMID: 21657074
PDF is available here.
PDF is available here.
Abstract
Sodium, niobium, and tantalum phosphate bronzes Na(4) M(8) P(4) O(32) (M=Nb, Ta) are employed as photocatalysts for water splitting to reveal the effects of the distortion of metal-oxygen octahedra on the photocatalytic performance. Addition of RuO(2) as a co-catalyst leads to high,...
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PMID: 21328551
PDF is available here.
PDF is available here.
Abstract
Polycrystalline CuInS(2) films were fabricated by sulfurization of electrodeposited Cu and In metallic precursor films. Structural analyses revealed that the CuInS(2) film formed compact agglomerates of crystallites with grain sizes of ca. 0.5-1.5 μm. Photoelectrochemical charac...
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PMID: 21328555
PDF is available here.
PDF is available here.
Abstract
Metallogels form from Cu(II) ions and tetratopic ligand rctt-1,2-bis(3-pyridyl)-3,4-bis(4-pyridyl)cyclobutane. The tetrapyridyl cyclobutane has been synthesized in the organic solid state. The gel forms with a variety of counteranions and gels water. The hydrogel is thixotropic and is composed of nan...
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PMID: 21341662
PDF is available here.
PDF is available here.
Abstract
We studied the structure of a biotin-mimetic peptide (FSHPQNT) bound to streptavidin, since the x-ray structure of the complex is available to 1.74Å resolution and we found that conditions could be adjusted so that the off-rates were fast enough for Tr-NOESY NMR. The off-rate was determined with (1...
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PMID: 21294848
PDF is available here.
PDF is available here.
Abstract
Haloalkane dehalogenases make up an important class of hydrolytic enzymes which catalyse the cleavage of carbon-halogen bonds in halogenated aliphatic compounds. There is growing interest in these enzymes owing to their potential use in environmental and industrial applications. The haloalkane dehal...
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PMID: 21301099
PDF is available here.
PDF is available here.
Abstract
Octaprenyl pyrophosphate synthase (OPPs) is involved in the synthesis of the side chains of ubiquinone and menaquinone and catalyzes consecutive condensation reactions of farnesyl pyrophosphate with isopentenyl pyrophosphate to generate polyprenyl pyrophosphate and pyrophosphate. In order to invest...
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PMID: 21301101
PDF is available here.
PDF is available here.
Abstract
Penicillin-binding proteins catalyze the biosynthesis of the peptidoglycan chains of the bacterial cell wall, which protects cells from osmotic pressure. Although Lmo0540 has been identified as a putative penicillin-binding protein that contributes to the virulence of Listeria monocytogenes, the bio...
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PMID: 21301102
PDF is available here.
PDF is available here.
Abstract
Proline is a unique amino acid owing to the relatively small energy difference between the cis and trans conformations of its peptide bond. The X-Pro imide bond readily undergoes cis-trans isomerization in the context of short peptides as well as some proteins. However, the direct detection of cis-t...
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PMID: 21301103
PDF is available here.
PDF is available here.
Abstract
The adhesin fimbriae-associated protein 1 (Fap1) is a surface protein of Streptococcus parasanguinis FW213 and plays a major role in the formation of dental plaque in humans. Increased adherence is highly correlated to a reduction in pH and acid activation has been mapped to a subdomain: Fap1-NR(α)...
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PMID: 21301104
PDF is available here.
PDF is available here.
Abstract
FlhB is a key protein in the regulation of protein export by the bacterial flagellar secretion system. It is composed of two domains: an N-terminal transmembrane domain and a C-terminal cytoplasmic domain (FlhBc). Here, the crystallization and preliminary crystallographic analysis of FlhBc from Aqui...
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PMID: 21301106
PDF is available here.
PDF is available here.
Abstract
Phosphoribosylglycinamide formyltransferase (PurN) from Streptococcus mutans was recombinantly expressed in Escherichia coli. An effective purification protocol was established. The purified protein, which had a purity of >95%, was identified by SDS-PAGE and MALDI-TOF MS. The protein was crystallize...
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PMID: 21301108
PDF is available here.
PDF is available here.
Abstract
Fatty-acid binding proteins (FABPs) are abundantly expressed proteins that bind a range of lipophilic molecules. They have been implicated in the import and intracellular distribution of their ligands and have been linked with metabolic and inflammatory responses in the cells in which they are expre...
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PMID: 21301109
PDF is available here.
PDF is available here.
Abstract
During fatty-acid biosynthesis, enoyl-acyl carrier protein (enoyl-ACP) reductase catalyzes the reduction of trans-2-enoyl-ACP to fully saturated acyl-ACP via the ubiquitous fatty-acid synthase system. NADH-dependent enoyl-ACP reductase (FabI) from Pseudomonas aeruginosa has been purified and crystal...
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PMID: 21301088
PDF is available here.
PDF is available here.
Abstract
Myosin light-chain kinase-dependent tight junction regulation is a critical event in inflammatory cytokine-induced increases in epithelial paracellular permeability. MLCK is expressed in human intestinal epithelium as two isoforms, long MLCK1 and long MLCK2, and MLCK1 is specifically localized to th...
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PMID: 21301090
PDF is available here.
PDF is available here.
Abstract
Vibrio hollisae, a halophilic species recently reclassified as Grimontia hollisae, is a causative agent of gastroenteritis and septicaemia. One important pathogenic Vibrio factor, thermostable direct haemolysin (TDH), has been purified and crystallized in two crystal forms using the vapour-diffusion...
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PMID: 21301091
PDF is available here.
PDF is available here.
Abstract
The cysteine protease inhibitor from Ascaris lumbricoides, a roundworm that lives in the human intestine, may be involved in the suppression of human immune responses. Here, the molecular cloning, protein expression and purification, preliminary crystallization and crystallographic characterization...
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PMID: 21301092
PDF is available here.
PDF is available here.
Abstract
Phospholipases D are the major dermonecrotic component of Loxosceles venom and catalyze the hydrolysis of phospholipids, resulting in the formation of lipid mediators such as ceramide-1-phosphate and lysophosphatidic acid which can induce pathological and biological responses. Phospholipases D can b...
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PMID: 21301094
PDF is available here.
PDF is available here.
Abstract
Poly(A) polymerase (PAP) synthesizes the polyadenine tail at the 3'-end of messenger RNA. A disulfide cross-linking strategy was implemented to obtain a complex between bovine PAP (bPAP) and a 15-mer oligo(A). All seven endogenous cysteines were mutated to eliminate nonspecific cross-linked complex...
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PMID: 21301096
PDF is available here.
PDF is available here.
Abstract
We report the characterization of four anhydrous forms of ACV and a new hydrate in addition to the known hydrate. Two of the anhydrous forms appear as small needles and are stable to air exposure, whereas the third form is morphologically similar but quickly absorbs water from the atmosphere and con...
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PMID: 21280051
PDF is available here.
PDF is available here.
Abstract
The aim of the present work was to improve the dissolution characteristics of the poorly water soluble antiepileptic drug lamotrigine (LMN) by inclusion complexation using hydroxy propyl beta-cyclodextrin (HP beta-CD) by co-evaporation technique and by, solid dispersion, prepared by...
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PMID: 21434574
PDF is available here.
PDF is available here.
Abstract
Four new Ru(II) Cl and Ru(II) H(2) O complexes containing the meridional 2,2':6',2"-terpyridine (trpy) ligand and the chelating 2-(5-phenyl-1H-pyrazol-3-yl)pyridine (H3p) ligand of general formula in- and out-[Ru(II) (trpy)(H3p)(X)](n+) (X=Cl, n=1; X=H(2) O, n=2) have been prep...
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PMID: 21275063
PDF is available here.
PDF is available here.
Abstract
There is increasing interest in the environmental and health consequences of silver nanoparticles as the use of this material becomes widespread. Although human exposure to nanosilver is increasing, only a few studies address possible toxic effect of inhaled nanosilver. The objective of this study wa...
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PMID: 21266073
PDF is available here.
PDF is available here.
Abstract
Etoricoxib is an anti-inflammatory drug largely used in a variety of acute and chronic inflammatory diseases, but is associated with low aqueous solubility and poor dissolution leading to a delayed rate of absorption and onset of action. This study focuses on the development and pharmacological evalu...
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PMID: 21485302
PDF is available here.
PDF is available here.