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Results 201 - 250 of 5693
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Tang Heqing - - 2012
Direct evidences were first demonstrated for the oxidative degradation of decabromodiphenyl ether (BDE209) in aqueous TiO2 dispersions under UV irradiation (λ>340 nm). BDE209 was hardly debrominated over TiO2 in UV-irradiated acetonitrile dispersions, but the addition of water into the dispersions greatly enhanced its photocatalytic oxidative debromination. The debromination efficiency of ...
Sam Cecilia Hy - - 2012
OBJECTIVE: To evaluate the reliability and relative validity of a semi-quantitative FFQ for assessing the habitual intake of multiple nutrients in New Zealand (NZ) adults over the past 12 months. DESIGN: A 154-item FFQ was developed. After initial pre-testing, reliability was assessed using intra-class correlations. Relative validity was assessed by ...
Terriente Javier - - 2012
The introduction of mechanism-based targeted therapies to treat human cancers is fruit of decades of research into the molecular basis of cancer pathogenesis. Despite the growing knowledge about the molecular mechanisms governing its causes and progression, there is a lack of effective treatments for many types of cancer. The expensive ...
Salama M - - 2012
A key feature of Parkinson's disease is the dopaminergic neuronal cell loss in the substantia nigra pars compacta. Besides inflammation, oxidative stress and apoptosis, a recent hypothesis suggested that degeneration of dopaminergic neurons occurs secondary to abnormal mitosis in these 'postmitotic neurons', ending up in apoptosis. Hence, recent therapies tried ...
Cognard Emmanuelle - - 2012
Pancreatic β-cells are highly responsive to changes in glucose but the mechanisms involved are only partially understood. There is increasing evidence that the β-catenin signalling pathway plays an important role in regulating β-cell function but the mechanisms regulating β-catenin signalling in these cells is not well understood. Here we show ...
Raveau Bernard - - 2012
Transition-metal oxides have been widely studied for understanding the physics of strongly electron-correlated systems. The crucial role of crystal chemistry for the discovery of three families: the high T(c) superconducting cuprates, the colossal magnetoresistance manganates, the thermoelectric, and multiferroic cobaltates, is explored.
Parés-Casanova P M - - 2012
The purpose of this article was to examine the level of sexual dimorphism exhibited in the foramen magnum and occipital condyles of bovine juveniles and to test the utility of three basicranial measurements for estimating sex and to evaluate breed differences. Data were taken from 68 bovines of known sex, ...
Alibek Kenneth - - 2012
ABSTRACT: Since the late 1990s, infectious agents have been thought to play a role in the pathogenesis of approximately 15% of cancers. It is now widely accepted that infection of stomach tissue with the bacteria Helicobacter pylori is an important cause of stomach adenocarcinoma. In addition, oncogenic viruses, such as ...
Ogoshi Tomoki - - 2012
We report a new route for the selective synthesis of di- and tetra-functionalized pillararenes via oxidation and reduction of the pillararene units. Hypervalent-iodine oxidation of perethylated pillar[5]arene afforded pillar[5]arene derivatives containing one benzoquinone unit and two benzoquinones at the A,B- and A,C-units. A pillar[6]arene derivative containing one benzoquinone unit was ...
Haugen Thomas A - - 2012
Abstract We examined the effect of different false start rules and starters' holding time on athletics sprinters' reaction times. Reaction times from 210 female (25.2 ± 3.8 years) and 361 male (24.8 ± 3.8 years) 100 m sprinters, participating in international championships for seniors from 1997 to 2011, were analysed. Holding time calculations were based ...
Hopper John L - - 2012
The Australian Twin Registry (ATR) is a national volunteer resource of twin pairs and higher-order multiples willing to consider participating in health, medical, and scientific research. The vision of the ATR is 'to realize the full potential of research involving twins to improve the health and well-being of all Australians'. ...
Berlim M T - - 2012
BACKGROUND: Bilateral repetitive magnetic stimulation (rTMS) is a promising novel therapeutic intervention for major depression (MD). However, clinical trials to date have reported conflicting evidence concerning its overall efficacy, which might have resulted from low statistical power. Thus, meta-analytical approaches could be useful in examining this issue by allowing the ...
Zheng Mingming - - 2012
In this study, a novel mixed-mode composite material SiO2@P(MAA-co-VBC-co-DVB) was prepared via the hypercrosslinking of its precursor which was produced via suspension polymerization in the presence of SiO2 particles. Candida rugosa lipase (CRL) was immobilized on the SiO2@P(MAA-co-VBC-co-DVB) particles via hydrophobic and weak cation-exchange interaction. The resulting immobilized CRL showed ...
Barros Erica G - - 2012
OBJECTIVE: The aim of the present study was to compare BMI and anthropometric indicators of abdominal obesity in Brazilian adolescents from public schools between 2003 and 2008. DESIGN: A comparison of anthropometric indicators in adolescents was done based on two cross-sectional surveys conducted in 2003 (n 530) and in 2008 ...
Vansteenkiste Maarten - - 2012
OBJECTIVE: The presence of nonsuicidal self-injury (NSSI) in eating-disordered (ED) patients is considered a complicating factor in treatment with a possibly adverse influence on patients' motivation to change. Using Self-Determination Theory as a guiding framework, we compared ED patients with and without NSSI in terms of their well-being and their ...
Suresh Anil K - - 2012
Metal and metal oxide nanoparticles are among the most commonly used nanomaterials and their potential for adversely affecting environmental systems raises concern. Complex microbial consortia underlie environmental processes, and the potential toxicity of nanoparticles to microbial systems, and the consequent impacts on trophic balances, is particularly worrisome. The diverse array ...
Li Yifei - - 2012
OBJECTIVE: Percutaneous transcatheter occlusion has benefited thousands of patients suffering from patent foramen ovale and atrial septal defect. However, no general agreement has been reached on the superiority among occluders. Thus, a meta-analysis between the two most commonly adopted types of occluders was conducted. METHODS: The literature review has identified ...
Chen Hui - - 2012
Aim:To study the effects of Na(+) channel blocker flecainide and L-type Ca(2+) channel antagonist verapamil on the voltage-gated fKv1.4ΔN channel, an N-terminal-deleted mutant of the ferret Kv1.4 K(+) channel.Methods:fKv1.4ΔN channels were stably expressed in Xenopus oocytes. The K(+) currents were recorded using a two-electrode voltage-clamp technique. The drugs were administered ...
Mayhew Les - - 2012
There is increasing concern about the lack of accuracy in population projections at national levels. A common problem has been the systematic underestimation of improvements in mortality, especially at older ages, resulting in projections that are too low. In this paper, we present a method that is based on projecting ...
Stadelmann Mathieu - - 2012
Although heart donation after cardiac death (DCD) could greatly improve graft availability, concerns regarding warm ischemic damage typically preclude transplantation. Improving tolerance to warm ischemia may thus open a window of opportunity for DCD hearts. We investigated the hypothesis that, compared with normothermia, mild hypothermia (32° C) initiated after ischemic onset ...
van Gunsteren Wilfred F - - 2012
"Seven deadly sins" in modern academic research and publishing can be condensed into a list ranging from poorly described experimental or computational setups to falsification of data. This Essay describes these sins and their ramifications, and serves as a code of best practice for researchers in their quest for scientific ...
Brondolin Mirco - - 2012
BACKGROUND: Sphingolipids represent a major class of lipids which both serve as structural components of membranes and as bioactive molecules involved in lipid signaling. Ceramide synthases (cers) reside in the center of sphingolipid metabolism by producing ceramide through de novo synthesis or degradative pathways. While the six mammalian cers family ...
Geng Weizhi - - 2012
An efficient Pd-catalyzed cleavage of C(sp3)-N bonds in secondary amines and consequent C(sp2)-N and C(sp3)-N coupling process was developed. Various secondary amines could be used to react with alkenyl or aryl dibromides affording pyrroles and indoles in high yields. Cyclopentadiene-phosphine ligands, a new type of P-olefin ligands, were found to ...
Liu Shengsheng - - 2012
ABSTRACT: BACKGROUND: Diabetes has become a major public health problem in China. Support of patient self-management is a key component of effective diabetes care and improved patient outcomes. A series of peer-led community-based disease-specific self-management programs including diabetes have been widely disseminated in urban communities of Shanghai since 1999. However, ...
Sun Kai - - 2012
Aim:To construct a lentivirus-based inhibitor with specific secondary structure that could exert long-term suppression on microRNA-338-3p (miR-338-3p), thus elucidating its molecular function in colorectal carcinoma cells.Methods:The miR-338-3p inhibitor sequence was synthesized and inserted into pLV-THM plasmid. HEK-293T cells were co-transfected with the lentiviral vectors pLV-THM-miR-338-3p-inhibitor, psPAX2, and pMD2.G. The supernatant ...
de Vries Froukje E - - 2012
OBJECTIVE: The need for symmetry and ordering objects related to a "just right"-feeling is a common symptom in Tourette's syndrome (TS) and resembles symmetry behavior in obsessive-compulsive disorder, but its pathophysiology is unknown. We used a symptom provocation paradigm to investigate the neural correlates of symmetry behavior in TS and ...
Ernst Richard R - - 2012
Science, music, art, life: Nobel Laureate Richard Ernst discusses the influence of music and art on his life and how advanced Raman spectroscopy comes to his aid as a "hobby chemist" and art restorer.
Zhang Delong - - 2012
Spectroscopic imaging has been an increasingly critical approach for unveiling specific molecules in biological environments. Towards this goal, we demonstrate hyperspectral stimulated Raman loss (SRL) imaging by intra-pulse spectral scanning through a femtosecond pulse shaper. The hyperspectral stack of SRL images is further analyzed by a multivariate curve resolution (MCR) ...
Cook Kevin T - - 2012
We demonstrate a method for producing thickness- and refractive index-tunable antireflection coatings utilizing a one-step spin coating procedure with commercially available silica nanoparticle solutions. Aging nanoparticle solutions under controlled pH and temperature induces nanoparticle aggregation, which provides a precise way to control the porosity and thus refractive index of the ...
Rockman Howard A - - 2012
With the December issue of the Journal of Clinical Investigation, I announce the launch of a new category of manuscript called "Clinical Medicine," along with new editorial board members to adjudicate the peer-review process. With this initiative, the journal aims to publish the highest quality human research that reports early-stage, ...
Khan Umar - - 2012
We have exfoliated hexagonal boron nitride by ultrasonication in solutions of polyvinylalcohol in water. The resultant nanosheets are sterically stabilised by adsorbed polymer chains. Centrifugation-based size-selection was used to give dispersions of nanosheets with aspect ratio (length/thickness) of ∼1400. Such dispersions can be used to produce polyvinylalcohol-BN composite films. Helium ...
Jang Kwang-Suk - - 2012
The surface property of a polyimide gate insulator was successfully modified with an n-octadecyl side-chain. Alkyl chain-grafted poly(amic acid), the polyimide precursor, was synthesized using the diamine comonomer with an alkyl side-chain. By adding a base catalyst to the poly(amic acid) coating solution, the imidization temperature of the spin-coated film ...
Kleinstäuber Maria - - 2012
The current study investigated the role of fear-avoidance-a concept from chronic pain research-in chronic tinnitus. A self-report measure the "Tinnitus Fear-Avoidance Cognitions and Behaviors Scale (T-FAS)" was developed and validated. Furthermore, the role of fear-avoidance behavior as mediator of the relationship between anxiety sensitivity and tinnitus handicap was investigated. From ...
Yang Ya - - 2012
We report the first flexible hybrid energy cell that is capable of simultaneously or individually harvesting thermal, mechanical, and solar energies to power some electronic devices. For having both the pyroelectric and piezoelectric properties, a polarized poly(vinylidene fluoride) (PVDF) film-based nanogenerator (NG) was used to harvest thermal and mechanical energies. ...
He Jing-Kang - - 2012
Aim:To investigate the antitumor actions of the Crotalus durissus neurotoxin (crotoxin) on human esophageal carcinoma (Eca-109) cells in vitro and transplanted esophageal Eca-109 tumors in nude mice.Methods:The growth-inhibitory effect was analyzed in Eca-109 cells using MTT assay. Cell morphology changes in nuclei were observed using Hoechst 33342 staining, while apoptosis ...
Schmidbaur Hubert - - 2012
The revitalized concept of "coordination at carbon" allows relationships between seemingly unrelated families of carbon-centered compounds to be discovered generating fascinating patchwork families of compounds. It is shown how olefins and cyclopropanes can be regarded as donors for carbon acceptors C(1) , C(2) , and C(3) . Through this approach, ...
Sobol Marcin - - 2012
The majority of cell encapsulation systems applied so far are based on polyelectrolyte complexes of alginate and polyvalent metal cations. Although widely used, these systems suffer from the risk of disintegration. This can be partially solved by applying chitosan as additional outer membrane. However, chitosan can be dissolved in water ...
D'Onofrio Philippe M - - 2012
Retinal ischemia is a very useful model to study the impact of various cell death pathways, such as apoptosis and necrosis, in the ischemic retina. However, it is important to note that the retina is formed as an outpouching of the diencephalon and is part of the central nervous system. ...
Vignes-Adler Michèle - - 2012
Bubble, bubble: Why does champagne bubble? Why does it stop bubbling? Does the vintage affect its fizz? Chemistry can answer these and other questions about the wine that is so often associated with celebrations and anniversaries.
Tong Steven Y C - - 2012
This month's Genome Watch highlights the advantages of using whole-genome sequencing for infectious-disease surveillance and infection control.
Cech Thomas R - - 2012
RNA, just another starting material? Nobel Laureate Tom Cech shows that with an education steeped in kinetics, thermodynamics, and molecular structure, and armed with the ability to synthesize molecules, the chemist is ideally suited to investigate RNA.
Zhang Jian-Ping - - 2012
Because early treatment choice is critical in first-episode schizophrenia-spectrum disorders (FES), this meta-analysis compared efficacy and tolerability of individual second-generation antipsychotics (SGAs) with first-generation antipsychotics (FGAs) in FES. We conducted systematic literature search (until 12 December 2010) and meta-analysis of acute, randomized trials with ⩾1 FGA vs. SGA comparison; patients ...
Abidin Zada L Zainal - - 2012
The rate of organ donations from deceased donors in Malaysia is among the lowest in the world. This may be because of the passivity among health professionals in approaching families of potential donors. A questionnaire-based study was conducted amongst health professionals in two tertiary hospitals in Kuala Lumpur, Malaysia. Four ...
Hodge Allison - - 2012
ABSTRACT Background: Anxiety and depression contribute to morbidity in elderly adults and may be associated with diet. We investigated the association between diet and psychological distress as a marker for depression. Methods: Dietary patterns were defined by factor analysis or the Mediterranean Diet Score (MDS); depression and anxiety were assessed ...
Juniper D T - - 2012
The objective of this study was to determine the concentration of total selenium (Se) and the proportions of total Se comprised as selenomethionine (SeMet) and selenocysteine (SeCys) in the postmortem tissues of female pheasants (Phasianus Colchicus Torquator) offered diets that contained graded additions of selenised-enriched yeast (SY) or a single ...
Clark Daniel P A - - 2012
There is growing literature exploring the possibility of parallel retrieval of location memories, although this literature focuses primarily on the speed of retrieval with little attention to the accuracy of location memory recall. Baguley, Lansdale, Lines, and Parkin (2006) found that when a person has two or more memories for ...
Zhang Zhenyi - - 2012
Well-designed hierarchical nanostructures with one dimensional (1D) TiO(2) nanofibers (120-350 nm in diameter and several micrometers in length) and ultrathin hexagonal SnS(2) nanosheets (40-70 nm in lateral size and 4-8 nm in thickness) were successfully synthesized by combining the electrospinning technique (for TiO(2) nanofibers) and a hydrothermal growth method (for ...
Mittoux Aurélia - - 2012
PURPOSE: To explore whether the presence of specific health services impact the time to death in schizophrenia. METHODS: Cox's proportional hazard model was used to assess the effect of country-specific health care variables (total health care expenditure, public health care expenditure, number of hospital beds, number of physicians, and World ...
Cheng Shasha - - 2012
Ion mobility spectrometry (IMS) is a key trace detection technique for explosives and the development of simple, stable and efficient nonradioactive ionization source is highly demanded. A dopant-assisted negative photoionization (DANP) source has been developed for IMS, which uses a commercial VUV krypton lamp to ionize acetone as the source ...
Interian Alejandro - - 2012
OBJECTIVE: Unequal mental health among U.S. underserved racial-ethnic populations has become a prominent national concern. Contributing to this inequity is our limited ability to engage individuals from underserved populations into treatment. To help address this, a systematic literature review was conducted to examine the evidence base for interventions that can ...
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