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Results 251 - 300 of 4307
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Wang Yu - - 2013
High-pressure atom transfer radical polymerization (ATRP) of n-butyl acrylate (BA) is performed in acetonitrile (MeCN) with Cu(I) Br/TPMA [TPMA: tris(2-pyridylmethyl)-amine] as the catalyst up to 5 kbar. Increasing either pressure or temperature significantly enhances the rate of polymerization, while retaining control over the polymerization. The polymerizations under high pressure could ...
Belgardt Christian - - 2013
We present a case study about inkjet printing as a tool for molecular patterning of silicon oxide surfaces with hydrophobic functionality, mediated by n-octadecyltrichlorosilane (OTS) molecules. In contrast to state-of-the-art techniques such as micro contact printing or chemical immersion with subsequent lithography processes, piezo drop-on-demand inkjet printing does not depend ...
Tong Lianming - - 2013
The electromagnetic (EM) coupling between metal nanoparticles (NPs) is of essential importance in nanoplasmonic systems, leading to a variety of fundamental studies and practical applications. The successive investigations in this field not only bring forward surprising optical effects in nanoplasmonics, but also allow revealing other novel chemical/physical properties in relevant ...
Thomas Martin - - 2013
We review several methods for the calculation of vibrational spectra from ab initio molecular dynamics (AIMD) simulations and we present a new implementation in the trajectory analyzer TRAVIS. In particular, we show mass-weighted power spectra, infrared spectra, and Raman spectra with corresponding depolarization ratios, which are based on time-correlation functions ...
Gan Qiaoqiang - - 2013
Recent advances in molecular organic photovoltaics (OPVs) have shown 10% power conversion efficiency (PCE) for single-junction cells, which put them in direct competition with PVs based on amorphous silicon. Incorporation of plasmonic nanostructures for light trapping in these thin-film devices offers an attractive solution to realize higher-efficiency OPVs with PCE≫10%. ...
Kennedy David C - - 2013
Carbohydrates on cell surfaces are critical components of the extracellular landscape and contribute to cell signalling, motility, adhesion and recognition. Multivalent effects are essential to these interactions that are inherently weak. Carbohydrate-functionalised surfaces meet an important need for studying the multivalent interactions between carbohydrates and other biomolecules. Innovations in nanomaterials ...
Qin Hui - - 2013
We have developed a synergic micro-extraction procedure based on ionic liquid for the preconcentration and determination of glucocorticoids in water samples. Using non-ionic surfactant Triton X-100 (TX-100) as synergic reagent, 1-butyl-3-methylimidazolium hexafluorophosphate ([BMIM]PF(6) ) accomplished extraction rapidly without heating in water bath. One key property of ionic liquids that highlights ...
Wang Hui-Ping - - 2013
Anticholinesterase pesticides have been widely used in agricultural and domestic settings and can be detected in the environment after long-term use. Although the acute toxic effects of chlorpyrifos and carbaryl have been well described, little is known about the chronic toxicity of the pesticides mixture. To investigate their chronic neurotoxicity, ...
Jin Zhengzhong - - 2013
Soil microbes in forest land are crucial to soil development in extreme areas. In this study, methods of conventional culture, PLFA and PCR-DGGE were utilized to analyze soil microbial quantity, fatty acids and microbial DNA segments of soils subjected to different site conditions in the Tarim Desert Highway forest land. ...
Amador Fernando J - - 2013
Ryanodine Receptors (RyRs) are the largest known ion channels. They are Ca(2+) -release channels found primarily on the sarcoplasmic reticulum (SR) of myocytes. Several hundred mutations in RyRs are associated with skeletal or cardiomyocyte disease in humans. Many of these mutations can now be mapped onto the high-resolution structures of ...
Cao Shan - - 2013
Diatom settlement and cell division is important in two major aspects. Firstly, biofouling is a costly problem in the shipping industry that necessitates the effective inhibition of diatom settlement and proliferation. Secondly, biological coatings on the basis of ordered and densely packed cell lawns of diatom are useful for nano- ...
Grzybowski Andrzej - - 2013
In an era of scientific method, precision of nomenclature and an electronically accessible publication record, the early history of keratoconus still remains, in parts, as complex and perplexing as the disease itself. Historically, the disease has been somewhat confusingly referred to by several different terms, including hyperkeratosis, ochlodes, conical formed ...
Sun Jintang J Institute of Basic Medical Sciences, Jinan, - - 2013
Osteopontin (OPN), a multifunctional glycoprotein, has three transcripts that have distinct roles in tumors in vitro. Whether OPN transcripts have different functions in tumor processes in vivo is unclear. It has been reported that immune cell-derived OPN can promote tumor formation. We propose a hypothesis that tumor-derived OPN may facilitate ...
Yu Young-Sang - - 2013
Vortex structures in soft magnetic nanodisks are highly attractive due to their scientific beauty and potential technological applications. Here, we experimentally demonstrated the resonant amplification of vortex oscillations by application of simple coherent field pulses tuned to optimal width and time intervals. In order to investigate vortex excitations on the ...
Hong Bo-Han - - 2013
SCOPE: Invadopodia are actin-rich membrane protrusions of tumor cells that are thought to initiate the local migration and invasion during cancer metastasis. The blockade of invadopodia-associated proteins has been reported as a promising approach for prevention of tumor metastasis. The aim of this study was to investigate the modulatory effects ...
Sachan R - - 2013
Reduced degradation (oxidation) of silver nanoparticles (NPs) is achieved by contacting Ag with immiscible Co NPs. The relative decay of the plasmon peak (plot) shows that pure Ag NPs (blue dashed curve) decay by 25% in ca 20 days, whereas AgCo NPs last about 10 times longer, requiring nearly five ...
Zhang Wenbin - - 2013
A superhydrophobic-superoleophilic PVDF membrane is fabricated via an inert solvent-induced phase inversion for effective separation of both micrometer and nanometer-sized surfactant-free and surfactant-stabilized water-in-oil emulsions solely driven by gravity, with high separation efficiency (oil purity in filtrate after separation > 99.95 wt%) and high flux, which is several times higher ...
Etzel M - - 2013
In addition to ultrasound, elastography is available for evaluation of thyroid nodules for several years. Aim of this study was to verify a statistically significant correlation between palpation and elastography as well as between scintigraphy and elastography, respectively. Patients, methodes: 97 solitary thyroid nodules in 67 women (mean age 63.0 ...
Lo Zito L - - 2013
Abstract Purpose: To evaluate various factors that potentially influence the fetal body volume (FBV) measurement using magnetic resonance imaging (MRI) and to analyse whether the technique of measurement could be simplified. Materials and Methods: In 20 singleton pregnancies scheduled for a planned delivery, FBV measurements were performed by two independent ...
Tsubouchi Naoko N Digestive and Lifestyle Diseases, Department of Human and Environmental Sciences, Kagoshima University Graduate School of Medical and Dental Sciences, Kagoshima, - - 2013
Subjects positive for antibody to hepatitis B core antigen (HBcAb) and negative for hepatitis B surface antigen (HBsAg) are considered to have occult hepatitis B virus (HBV) infection. The aim of this study was to determine the impact of occult HBV infection on aggravation of the clinical course in hepatitis ...
Carey Alison J - - 2013
PROBLEM: Chlamydia trachomatis genital tract infections are easily treated with antibiotics; however, the majority of infections are asymptomatic and therefore untreated, highlighting the need for a vaccine. Because most infections are asymptomatic, vaccination could potentially be administered to individuals who may have an acute infection at that time. In such ...
Le Van Sang - - 2013
A cationic conjugated polyelectrolyte was designed and synthesized based on poly(fluorene-co-phenylene) containing 5 mol% benzothiadiazole (BT) as a low energy trap and 15-crown-5 as a recognizing group for potassium ions. A potassium ion can form a sandwich-type 2:1 Lewis acid-based complex with 15-crown-5, to cause the intermolecular aggregation of polymers. ...
Cai Xianlei - - 2013
To investigate the effects of different habitats and plant growth status on abundance, biomass and community structure of epiphytic microbes, Potamogeton malaianus Miq. at two different habitats (Gonghu Bay and East Taihu) in Lake Taihu were collected in June, August and November (corresponding to the period of development of submerged ...
Tietze Lutz F - - 2013
For the synthesis of (-)-diversonol (ent-1), an enantioselective domino-Wacker/carbonylation/methoxylation reaction and an enantioselective Wacker oxidation were used to give the chroman in high yield and 96 % and 93 % ee, respectively. Dihydroxylation at the vinyl moiety using the Sharpless procedure and a Wittig-Horner reaction followed by hydrogenation, benzylic oxidation, and an intramolecular ...
Shimoda Yasushi - - 2013
Triple play: The title reaction of an alkyl methyl ketone and two aldehydes using chiral (S)-binapo as a Lewis base catalyst allows access to 1,5-dihydroxy-3-pentanone derivatives with multiple chiral centers in good yields with high diastereo- and enantioselectivities in a single operation.
Cordero-Ramírez Jesús Damián - - 2013
Sinaloa state accounts for 23% of Mexico's tomato production. One constraint on this important crop is the Fusarium crown and root rot, caused by Fusarium oxysporum f. sp. radicis-lycopersici, which has been reported to reduce crop yield by up to 50%. In this study, we set out to identify bacterial ...
Park S - - 2013
Advances in lab-on-a-chip technologies enabled programmable, reconfigurable, and scalable manipulation of a variety of laboratory procedures. Samples, reagents, and fluids can be precisely controlled; buffer temperature, pH, and concentration control systems as well as a variety of detection systems can be integrated on a small chip. These advantages have attracted ...
Xia Haibing - - 2013
Big and small, short and tall: Nanoparticles (NPs) coated with pH-sensitive polymers underwent reversible chain growth as a result of varying electrostatic interparticle repulsion as determined by the pH value. Tuning of the pH value also enabled the coupling of differently sized NPs to form linear composite chains reminiscent of ...
Hafekost Katherine - - 2013
ABSTRACT: BACKGROUND: Despite the increasing understanding of the mechanisms relating to weight loss and maintenance, there are currently no validated public health interventions that are able to achieve sustained long-term weight loss or to stem the increasing prevalence of obesity in the population. We aimed to examine the models of ...
Rubasinghege Gayan G Department of Chemistry, University of Iowa, Iowa City, IA 52242, - - 2013
The chemistry of environmental interfaces such as oxide and carbonate surfaces under ambient conditions of temperature and relative humidity is of great interest from many perspectives including heterogeneous atmospheric chemistry, heterogeneous catalysis, photocatalysis, sensor technology, corrosion science, and cultural heritage science. As discussed here, adsorbed water plays important roles in ...
Xu Jie - - 2013
In order determine whether formate is a reaction intermediate of the direct pathway for formic acid oxidation at a Pt electrode, formic acid (HCOOH) oxidation at a Pt(111) electrode has been studied by normal and fast scan voltammetry in 0.1 M HClO(4) solutions with different HCOOH concentrations. The relationship between ...
Surette Marc E - - 2013
The daily consumption of dietary omega-3 PUFA is recommended by governmental agencies in several countries and by a number of health organizations. The molecular mechanisms by which these dietary PUFA affect health involve the enrichment of cellular membranes with long-chain 20- and 22-carbon omega-3 PUFA that impacts tissues by altering ...
Holmstrup Me - - 2013
OBJECTIVE: This study determinedthe hormonal and subjective appetite responses to exercise (1-h continuous v. intermittent exercise throughout the day) in obese individuals. DESIGN AND METHODS: Eleven obese subjects (>30 kg/m(2) ) underwent 3, 12-hour study days: control condition (sedentary behavior-SED), continuousexercise condition ((EX) 1-h exercise), and intermittentexercisecondition ((INT) 12 hourly, ...
Balthazar Marcio L F - - 2013
Neuropsychiatric syndromes are highly prevalent in Alzheimer's disease (AD), but their neurobiology is not completely understood. New methods in functional magnetic resonance imaging, such as intrinsic functional connectivity or "resting-state" analysis, may help to clarify this issue. Using such approaches, alterations in the default-mode and salience networks (SNs) have been ...
Liu Manhua - - 2013
Pattern classification methods have been widely investigated for analysis of brain images to assist the diagnosis of Alzheimer's disease (AD) and its early stage such as mild cognitive impairment (MCI). By considering the nature of pathological changes, a large number of features related to both local brain regions and interbrain ...
Sivan Sarit Sara SS Department of Biomedical Engineering, Technion, Israel Institute of Technology, IIT, 32000 Haifa, Israel. - - 2013
Aggrecan is one of the major macromolecular components of the intervertebral disc (IVD) and its loss is an early sign of degeneration. Restoration of aggrecan, and hence of biomechanical properties, is a major objective of biological therapies. At present, assessment of aggrecan concentration via its glycosaminoglycan (GAG) content is accomplished ...
Qi Xianghong - - 2013
Dynamic cell-to-cell interactions are a prerequisite to many biological processes, including development and biofilm formation. Flagellum induced motility has been shown to modulate the initial cell-cell or cell-surface interaction and to contribute to the emergence of macroscopic patterns. While the role of swimming motility in surface colonization has been analyzed ...
Czyzyk-Krzeska M F - - 2013
MicroRNAs are increasingly being recognized as oncogenes and tumor suppressors in cancer. MicroRNA-155 (miR-155) is an established oncomiR in breast cancer and regulates several pro-oncogenic pathways. In light of this, Chiang's group has discovered a novel pathway regulated by miR-155. MiR-155 directly targets the VHL tumor suppressor and, by doing ...
Chaix A - - 2013
Mutation of KIT receptor tyrosine kinase at residue D816 results in ligand-independent constitutive kinase activity. This mutation occurs in most patients with mastocytosis, a myeloproliferative neoplasm, and is detected at lower frequencies in acute myeloid leukemia and in germ cell tumors. Other KIT mutations occur in gastrointestinal stromal tumors (GIST) ...
Levinson Rebecca T - - 2013
Light chain (AL) amyloidosis is characterized by the misfolding of immunoglobulin light chains, accumulating as amyloid fibrils in vital organs. Multiple reports have indicated that amyloidogenic light chains internalize into a variety of cell types, but these studies used urine-derived proteins without indicating any protein sequence information. As a result, ...
Yang Tao - - 2013
The mitotic kinesin superfamily protein KIF14 is essential for cytokinesis and chromosome segregation and increased KIF14 expression is related to a variety of human cancers. In this study, we investigate KIF14 expression in association with clinical variables and the role of KIF14 during tumorigenesis. We found that KIF14 is overexpressed ...
Wen Yu-Guan - - 2013
OBJECTIVE: The aim of the study was to better understand blonanserin population pharmacokinetic (PK) characteristics in Chinese healthy subjects. METHODS: Data from two studies with 50 subjects were analyzed to investigate the population PK characteristics of blonanserin at single dose (4, 8, and 12 mg) under fasting, multidose (4 mg bid or ...
Clikeman Tyler T TT Department of Chemistry, Colorado State University, Fort Collins, CO 80523, - - 2013
The sequential addition of CN(-) or CH3(-) and electrophiles to three perfluoroalkylfullerenes (PFAFs), C(s)-C70(CF3)8, C1-C70(CF3)10, and C(s)-p-C60(CF3)2, was carried out to determine the most reactive individual fullerene C atoms (as opposed to the most reactive C=C bonds, which has previously been studied). Each PFAF reacted with CH3(-) or CN(-) to ...
Wong G W K - - 2013
BACKGROUND: We conducted Phase 2 of the Asthma Insights and Reality in the Asia-Pacific (AIRIAP 2) survey in 2006 to determine the level of asthma control in this region and the validity of the Asthma Control Test™ (ACT) and childhood ACT (C-ACT) in relation to asthma control. METHODS: Pediatric participants ...
Chávez J - - 2013
BACKGROUND: Nucleotides released to the extracellular space stimulate purinergic receptors, and their effects are modulated by ectonucleotidases. The role of ATP in the allergic bronchospasm has been scantly studied. METHODS: We used several techniques (plethysmography, organ baths, confocal microscopy, RT-PCR, ATP measurement) to explore the role of nucleotides and ectonucleotidases ...
Jayapalan Jaime Jacqueline - - 2013
The present study was aimed at the identification of proteins that are differentially expressed in the urine of patients with prostate cancer (PCa), those with benign prostatic hyperplasia (BPH) and age-matched healthy male control subjects. Using a combination of two-dimensional gel electrophoresis and tandem mass spectrometry, significantly lower expression of ...
Fabi Alessandra - - 2013
Nausea and vomiting are well recognized in different clinical situations, suggesting that no single mechanism is likely to be responsible for their production. Chemotherapy-induced nausea and vomiting (CINV) can have a negative impact on quality of life and this may lead to a refusal of curative therapy or to a ...
Scazzina Francesca - - 2013
As bread is the most relevant source of available carbohydrates in the diet and as lowering dietary glycaemic index (GI) is considered favourable to health, many studies have been carried out in order to decrease the GI of bread. The most relevant strategy that has been applied so far is ...
Hou Shuangxing - - 2013
ABSTRACT: BACKGROUND: Lead is a heavy metal and important environmental toxicant and nerve poison that can destruction many functions of the nervous system. Lead poisoning is a medical condition caused by increased levels of lead in the body. Lead interferes with a variety of body processes and is toxic to ...
Aizawa J - - 2013
Morphological studies of the gastrointestinal tract of blue-and-yellow macaws (Ara ararauna) are scarce. In view of the paucity of information regarding the digestive tract of macaws, this study aims to describe the gross anatomical features (oesophagus to cloaca) as part of a broad study of the gastrointestinal tract (GIT) of ...
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