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Results 201 - 250 of 5079
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Abbad Abdelaziz - - 2012
The composition of essential oils isolated from leaves of 11 natural populations of Cupressus atlantica, an endemic and endangered coniferous species from Morocco, was investigated by GC-MS. In total, 42 essential oil components were identified, accounting for 73.1-97.7% of the total oil. Monoterpene (25.2-84.9%) and sesquiterpene hydrocarbons (12.2-46.8%) were the ...
Portela Raquel - - 2012
The photocatalytic efficiency of TiO2-SiMgOx plates to oxidise H2S was first evaluated in a flat laboratory reactor with 50 ml min-1 synthetic air containing 100 ppm H2S in the presence of humidity. The use of the photocatalyst-adsorbent hybrid material enhanced the photocatalytic activity in terms of pollutant conversion, selectivity and ...
Sanchez-Moreno Manuel - - 2012
The <i>in vitro</i> and <i>in vivo</i> anti-<i>Trypanosoma cruzi</i> activity of the pyrazole-containing macrobicyclic polyamine <b>1</b> and N-methyl and N-benzyl-substituted monocyclic polyamines <b>2</b> and <b>3</b> was studied. Activity against both the acute and chronic phases of Chagas disease was considered. The compounds were more active against the parasite and less toxic ...
Ma Shijun - - 2012
A C(2)-symmetric tetraamine catalyst was developed for the asymmetric Michael addition of ketones to chalcones. The corresponding adducts 1,5-dicarbonyl compounds were obtained in good chemical yields with high levels of diastereo- and enantioselectivities (up to >99 : 1 dr and 93% ee) under mild conditions. By studying the ESI-MS of the intermediates, ...
Xie Yuanpeng - - 2012
A novel star-shaped chromophore, , was constructed by fusing three perylenebisimide branches and a truxene core. exhibits high photostability and excellent two-photon properties: the maximum of δ(TPA) is 11 000 GM at 990 nm and fluorescence quantum efficiency Φ is 0.40 in THF.
Terol Amanda - - 2012
The present work describes the first attempt to use microwave reversed phase high performance liquid chromatography (MW-HPLC) to carry out the separation of organic compounds. Biotin and riboflavin were selected for the characterization of the new separation technique. Additional vitamins (nicotinamide, pyridoxine and thiamine) were used as reference compounds. In ...
Ben Yahia Hamdi - - 2012
The new compounds Li(2-x)Na(x)Ni[PO(4)]F (x = 0.7, 1, and 2) have been synthesized by a solid state reaction route. Their crystal structures were determined from single-crystal X-ray diffraction data. Li(1.3)Na(0.7)Ni[PO(4)]F crystallizes with the orthorhombic Li(2)Ni[PO(4)]F structure, space group Pnma, a = 10.7874(3), b = 6.2196(5), c = 11.1780(4) Å and ...
Iwanaga Kazunori - - 2012
Recently, the number of poorly water-soluble drug candidates has increased and has hindered the rapid improvement of new drugs with low intestinal absorption; however, the intestinal absorption of pH-dependent poorly water-soluble compounds is expected to be markedly improved by changing the pH in the vicinity of the absorption site. The ...
Weiland Silvia - - 2012
Research findings show that proposers make surprisingly fair offers in the ultimatum and dictator games, an observation that contradicts predictions of classical game theory. The present functional magnetic resonance imaging (fMRI) study examines brain activities of proposers that contribute to fair and unfair behaviors. We hypothesized that egoistic and altruistic ...
Hanfstein B - - 2012
In the face of competing first-line treatment options for CML, early prediction of prognosis on imatinib is desirable to assure favorable survival or otherwise consider the use of a second-generation tyrosine kinase inhibitor (TKI). A total of 1303 newly diagnosed imatinib-treated patients (pts) were investigated to correlate molecular and cytogenetic ...
Tuwairqi Waleed S - - 2012
To evaluate 1-year visual and topographic outcomes and safety and efficacy of corneal collagen cross-linking (CXL) combined with topography-guided photorefractive keratectomy (TG-PRK) to achieve near emmetropia in eyes with low-grade keratoconus. Twenty-two eyes from 15 patients (11 women, 4 men) were included in a prospective, nonrandomized, noncontrolled clinical study. Mean ...
Wang Jing - - 2012
In recent years, many researchers have paid more and more attentions on the use of Nanotechnology. Solid lipid nanoparticles (SLNs) are emerged as a promising alternation herein to emulsions, liposomes, microparticles and polymeric nanoparticles for their advantages. As promising drug carrier systems, SLNs are valuable for nanomedicine and have been ...
Schuster J - - 2012
Photoluminescence lineshape properties of quasi-two-dimensional electron systems in setback δ-doped GaAs heterostructures are studied at liquid helium temperature. Contributions from the ground and the first excited two-dimensional subband are clearly observed. A simple fit to the lineshape including broadening demonstrates that there is an exponential low-energy tail associated with the ...
Batista Ronaldo J C - - 2012
We investigate by means of a GGA + U implementation of density functional theory the electronic and structural properties of magnetic nanotubes composed of an iron oxide monolayer and (n,0) boron nitride (BN) nanotubes, with n ranging from 6 to 14. The formation energy per FeO molecule of FeO covered tubes is ...
Krijgsheld Pauline - - 2012
<i>Aspergillus niger</i> is an important cell factory for the industrial production of enzymes. These enzymes are released into the culture medium, from which they can be easily isolated. Here, we determined with stable isotope dimethyl labeling the secretome of 5 concentric zones of 7-day-old xylose-grown colonies of <i>A. niger</i> that ...
Huang Sherry - - 2012
Ultrasmall water-soluble silver nanoclusters are synthesized and their properties are investigated. The silver nanoclusters have high colloidal stability and show fluorescence in the red. This demonstrates that like gold nanoclusters also silver nanoclusters can be fluorescent.
Doni S - - 2012
In the past several years, industrial and agricultural activities have led to serious environmental pollution, resulting in a large number of contaminated sites. As a result, much recent research activity has focused on the application of bioremediation technologies as an environmentally friendly and economically feasible means for decontamination of polluted ...
Asano Yoshiaki - - 2012
A gable-type zinc phthalocyanine and a derived planar bis-phthalocyanine containing a shared anthracene unit have been synthesized and their spectroscopic properties examined. The former showed a split Q band, while the latter exhibited a red-shifted but unsplit Q band, as explained by exciton coupling theory and molecular orbital calculations.
Schmidt Bernd - - 2012
A sequence of acetamide directed oxidative Heck reaction and deacetylation-diazotation-Heck coupling allows the traceless removal of the acetamide group and its dual exploitation as a catalyst directing group and a leaving group.
Felipe E T - - 2012
Flavonoids, in general, have potent antioxidant activity and they can be used in treating chronic diseases involving oxidative stress, such as diabetes mellitus. The purpose of this study was to evaluate the cytotoxicity and cytoprotective effects of citrus flavonoids on the functionality of BRIN-BD11 cells. The assessment of cytotoxic and ...
Ozono Hiroki - - 2012
Humans must coordinate approach-avoidance behaviours with the social cues that elicit them, such as facial expressions and gaze direction. We hypothesised that when someone is observed looking in a particular direction with a happy expression, the observer would tend to approach that direction, but that when someone is observed looking ...
Chaichana Thanapong - - 2012
In this study, we investigate plaques located at the left coronary bifurcation. We focus on the effect that the resulting changes in wall shear stress (WSS) and wall pressure stress gradient (WPSG) have on atherosclerotic progress in coronary artery disease. Coronary plaques were simulated and placed at the left main ...
Bleijlevens Boris - - 2012
The Escherichia coli DNA repair enzyme AlkB is a 2-oxoglutarate (2OG) dependent Fe2+ binding dioxygenase that removes methyl lesions from DNA and RNA. To date, nine human AlkB homologues are known: ABH1 to ABH8 and the obesity-related FTO. Similar to AlkB, these homologues exert their activity on nucleic acids, although ...
Wang Yujun - - 2012
Micelles assembled from amphiphilic poly(ethylene glycol)/poly(ε-caprolactone) (PEG/PCL) copolymers are promised as safe and effective drug delivery systems. They offer the potential to achieve high solubility of hydrophobic drugs, long blood circulation time and effective delivery to target organs. These advantages contribute to their application as vehicles of a broad variation ...
Zhang Nian-Zhang - - 2012
Haemophius parasuis is known to produce a group of virulence-associated autotransporter (AT) proteins, VtaAs; however, no other ATs have been characterized yet. On the basis of reported sequence of a putative espP2 gene for extracellular serine protease (ESP)-like protein of H. parasuis, this putative AT gene was successfully amplified from ...
Schaefer A - - 2012
Purpose: To evaluate the calibration of an adaptive thresholding algorithm (contrast-oriented algorithm) for FDG PET-based delineation of tumour volumes in eleven centres with respect to scanner types and image data processing by phantom measurements. Methods: A cylindrical phantom with spheres of different diameters was filled with FDG realizing different signal-to-background ...
Tuziuti Toru - - 2012
Differences in the amount of water-mist separation and the intensity of luminol chemiluminescence for pulsed and continuous-wave (CW) ultrasound at 135 kHz have been investigated. The amount of mist generated is estimated using the cooling rate of a copper plate sprayed with the mist. For pulsed operation with an appropriate ...
Ishigaki Kyohei - - 2012
A one-month male Greyhound dog presented with a swinging gait of the hindlimbs, and later developed muscular atrophy of the femoral region and hyperextension of hindlimbs. The dog had positive serum IFAT titers to Neospora caninum, but a negative titer in the cerebrospinal fluid (CSF). N. caninum-specific DNA was amplified ...
Platon Mélanie - - 2012
A survey highlighting the most recent palladium catalytic systems produced and their performances for progress in direct synthesis of indole backbones by heterocarbocyclization of reactive substrates is provided. The discussion is developed in relation with the principles of sustainable chemistry concerning atom and mass economy. In this respect, the general ...
Rúa-Gómez Paola C - - 2012
The presence of the anesthetic lidocaine (LDC), the analgesic tramadol (TRA), the antidepressant venlafaxine (VEN) and the metabolites O-desmethyltramadol (ODT) and O-desmethylvenlafaxine (ODV) was investigated in wastewater treatment plant (WWTP) effluents, in surface waters and in groundwater. The analytes were detected in all effluent samples and in only 64% of ...
Teunisse Jan-Pieter - - 2012
In this study, we compared neuropsychological tests and parent-based ratings of flexibility in a sample of children with autism spectrum disorders (ASD). We investigated the discriminant validity of the domain-specific flexibility measures by comparison with the domain general measures, general behavioral problems, general ASD-related traits, and general intelligence. Tests and ...
Gitto Rosaria - - 2012
A series of arylsulfonamides has been synthesized and investigated for the inhibition of some selected human carbonic anhydrase isoforms. The studied compounds showed significant inhibitory effects in the nanomolar range towards druggable isoforms (hCA VII, hCA IX, and hCA XIV) (Ki values from 4.8 to 61.7 nM), whereas they generally ...
Wu Xin - - 2012
By designing a long and hydrophobic stilbeneboronic acid (STDBA) and allowing it to be included within the cavity of γ-cyclodextrin (γ-CyD) we succeeded in developing a fluorescent 2 : 2 STDBA-γ-CyD ensemble that shows a selective and sensitive response toward glucose in aqueous solutions, with satisfactory application in artificial urine samples.
Mitkina Tatiana - - 2012
The oxidative coupling of sp(3) hybridized carbon atoms by photocatalysis is a valuable synthetic method as stoichiometric oxidation reagents can be avoided and dihydrogen is the only byproduct of the reaction. Cadmium sulfide, a readily available semiconductor, was used as a visible light heterogeneous photocatalyst for the oxidative coupling of ...
Feng Jun-Tao - - 2012
Thirty-eight new ester derivatives of carabrol were designed, synthesized and characterized by 1H and 13C NMR and HR-ESI-MS. Their antifungal activities against the fungal pathogen Colletotrichum lagenarium were evaluated using spore germination assay. Of these 38 ester derivatives, 16 showed higher antifungal activity than that of carabrol and 7 showed ...
Cai Xiaojun - - 2012
A dual stimulus-responsive mPEG-SS-PLL(15)-glutaraldehyde star (mPEG-SS-PLL(15)-star) catiomer is developed and biologically evaluated. The catiomer system combines redox-sensitive removal of an external PEG shell with acid-induced escape from the endosomal compartment. The design rationale for PEG shell removal is to augment intracellular uptake of mPEG-SS-PLL(15)-star/DNA complexes in the presence of tumor-relevant ...
Yamada H - - 2012
We developed an in-tube in situ hybridization method for mRNA quantification after fluorescence-activated cell sorting (FACS-mQ). A specific RNA in a particular cell type is stained with a cRNA probe and a fluorescent dye, which allows the stained cells to be selected by FACS without excessive RNA degradation. Our previous ...
Yang Yidong - - 2012
The ADMET of a compound is dependent on physicochemical properties like molecular size, lipophilicity and ionization state. However, much less is known regarding the relationship between ADMET and the molecular topology. In this study two descriptors related to the molecular topology have been investigated, the fraction of the molecular framework ...
Mhadhbi Lazhar - - 2012
Perfluorooctanoic acid (PFOA) and perfluorooctane sulfonic acid (PFOS) are anthropogenic substances classified as persistent bioaccumulative compounds and are found in various environmental compartments throughout the world, from industrialized regions to remote zones far from areas of production. In this study, we assessed the effects of PFOA and PFOS on early ...
Okamoto Itaru - - 2012
Thiopyrimidine pairs in DNA duplexes were unexpectedly largely stabilized by complexation with two equivalents of Ag(i) ions and their binding properties were evaluated. The metal ion-binding properties of the thiopyrimidine base pairs differed significantly from those of unpaired bases.
Li Qin-Fan - - 2012
By a series of experiments, we identified a new member of locoweed family, Oxytropis serioopetala, which produces swainsonine, a phytotoxin harmful to livestock. In order to evaluate the toxicity of Oxytropis serioopetala, its extract was administered to ten rabbits by gavage at a dose of 1.5 mg/kg body weight as ...
Tyborski T - - 2012
Polymeric derivatives of dicyandiamide were synthesized via a bulk thermal condensation method, using a range of process temperatures between 400 and 610 °C. The obtained carbon nitride powders exhibit an optical transition in the UV-green range that has been assigned to the direct bandgap of a semiconductor-like material. Within this context, ...
Gao Feng - - 2012
We here report an efficient and enhanced fluorescence energy transfer system between confined quantum dots by entrapping CdTe into the mesoporous silica shell (CdTe@SiO2) as donors and gold nanoparticles (AuNPs) as acceptors. At pH 6.50, the CdTe@SiO2-AuNPs assemblies coalesce to form larger clusters due to charge neutralization, leading to the ...
Banala Srinivas - - 2012
A hexafullereno-diporphyrinoid was obtained in a sequence of cycloaddition steps using porphyrins programmed for [4+2]-cycloaddition reactions and C(60)-fullerene.
Qian Shuai - - 2012
Due to great efforts in past 45 years, several liposomal products including two liposomal vaccine products have been commercialized and many more potential products are now under clinical trial stage. Although liposome has significantly reduced the toxicity of the drugs with improved or maintained the efficacy, its further development has ...
Lin Hongjun - - 2012
Nanomaterials have unique physicochemical properties compared with those bulk materials of the same composition. Possible undesirable results of these capabilities are harmful interactions with biological systems and the environment, with the potential to generate toxicity. A number of studies on the effects of Nanomaterials in vitro and in vivo systems ...
Ripolles-Sanchis Teresa - - 2012
Three alkoxy-wrapped push-pull porphyrins were designed and synthesized for dye-sensitized solar cell (DSSC) applications. Spectral, electrochemical, photovoltaic and electrochemical impedance spectroscopy properties of these porphyrin sensitizers were well investigated to provide evidence for the molecular design.
Chi Zhenguo - - 2012
Mechanofluorochromic materials, which are dependent on changes in physical molecular packing modes, have attracted considerable interest over the past ten years. In this review, recent progress in the area of pure organic mechanofluorochromism is summarized, and majority of the reported organic mechanofluorochromic systems are discussed, along with their derived structure-property ...
Pauly-Takacs Katalin - - 2012
Survivors of childhood brain tumors often acquire complex cognitive difficulties including impairments in attention, processing speed, and different aspects of memory function. These impairments can affect their learning in the real world and in the classroom. However, the efficacy of memory rehabilitation techniques post treatment has not yet been assessed ...
McCrary Parker D - - 2012
Boron nanoparticles prepared by milling in the presence of a hypergolic energetic ionic liquid (EIL) are suspendable in the EIL and the EIL retains hypergolicity leading to the ignition of the boron. This approach allows for incorporation of a variety of nanoscale additives to improve EIL properties, such as energetic ...
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