Showing 1-30 of 156 resultados for "

GF08868314

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Nan Xu et al.
Gene, 554(2), 140-147 (2014-12-03)
Lactobacillus casei LC2W is a recently isolated probiotic lactic acid bacterial strain, which is widely used in the dairy and pharmaceutical industries and in clinical medicine. The first genome-scale metabolic model for L. casei, composed of 846 genes, 969 metabolic...
Gregory R Wagner et al.
Molecular cell, 54(1), 5-16 (2014-04-15)
Cellular proteins are decorated with a wide range of acetyl and other acyl modifications. Many studies have demonstrated regulation of site-specific acetylation by acetyltransferases and deacetylases. Acylation is emerging as a new type of lysine modification, but less is known...
Amaia Zúñiga-Ripa et al.
Journal of bacteriology, 196(16), 3045-3057 (2014-06-18)
The brucellae are the etiological agents of brucellosis, a worldwide-distributed zoonosis. These bacteria are facultative intracellular parasites and thus are able to adjust their metabolism to the extra- and intracellular environments encountered during an infectious cycle. However, this aspect of...
Hengzhi You et al.
Nature, 517(7534), 351-355 (2015-01-17)
The development of new reactions forming asymmetric carbon-carbon bonds has enabled chemists to synthesize a broad range of important carbon-containing molecules, including pharmaceutical agents, fragrances and polymers. Most strategies to obtain enantiomerically enriched molecules rely on either generating new stereogenic...
David Kentner et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(27), 9929-9934 (2014-06-25)
Shigella flexneri proliferate in infected human epithelial cells at exceptionally high rates. This vigorous growth has important consequences for rapid progression to life-threatening bloody diarrhea, but the underlying metabolic mechanisms remain poorly understood. Here, we used metabolomics, proteomics, and genetic...
Cinzia Formighieri et al.
Archives of microbiology, 196(12), 853-861 (2014-08-15)
Escherichia coli was used as a microbial system for the heterologous synthesis of β-phellandrene, a monoterpene of plant origin with several potential commercial applications. Expression of Lavandula angustifolia β-phellandrene synthase (PHLS), alone or in combination with Picea abies geranyl-diphosphate synthase...
Deguo Kong et al.
Chemosphere, 110, 31-40 (2014-06-02)
The effect of projected future changes in temperature, wind speed, precipitation and particulate organic carbon on concentrations of persistent organic chemicals in the Baltic Sea regional environment is evaluated using the POPCYCLING-Baltic multimedia chemical fate model. Steady-state concentrations of hypothetical...
N Cappelletti et al.
Bulletin of environmental contamination and toxicology, 93(4), 388-392 (2014-08-01)
Settling particles (SPs) and sediments collected in the Buenos Aires sewer area were analyzed for dioxin like polychlorinated biphenyls (dlPCBs) and polybrominated diphenyl ethers (PBDEs) to follow early diagenetic changes during transport and deposition of organic matter. SP showed a...
Xuexia Wang et al.
Environmental monitoring and assessment, 186(10), 6903-6917 (2014-07-16)
A 3-year survey was conducted to explore the relationships among plant composition, productivity, and soil fertility characterizing four different degradation stages of an alpine meadow in the source region of the Yangtze and Yellow Rivers, China. Results showed that plant...
Koichi Ando et al.
International journal of radiation biology, 90(12), 1119-1124 (2014-06-14)
To determine the dose-dependent relative biological effectiveness (RBE) for tumor prevalence in mice receiving single localized doses to their right leg of either carbon ions (15, 45 or 75 keV/μm) or 137Cs gamma rays. A total of 1647 female C3H...
B Mukherjee et al.
Journal of environmental biology, 35(3), 577-588 (2014-05-13)
Modelling system dynamics in a hyper-eutrophic lake is quite complex especially with a constant influx of detergents and sewage material which continually changes the state variables and interferes with the assessment of the chemical rhythm occurring in polluted conditions as...
J C Rodríguez-Murillo et al.
The Science of the total environment, 502, 206-217 (2014-09-27)
Increases in dissolved organic carbon (DOC) concentrations have often been reported in rivers and lakes of the Northern Hemisphere over the last few decades. High-quality organic carbon (OC) concentration data have been used to study the change in DOC and...
Anton Poot et al.
Environmental pollution (Barking, Essex : 1987), 193, 247-253 (2014-07-27)
Here, we provide Rock Eval and black carbon (BC) characteristics and polycyclic aromatic hydrocarbon (PAH) distribution coefficients (KD) for sediments from the Danube, Elbe, Ebro, and Meuse river basins. PAH desorption kinetic parameters were determined using sequential Tenax extractions. We...
Clemens Vinzenz Ullmann et al.
Proceedings of the National Academy of Sciences of the United States of America, 111(28), 10073-10076 (2014-07-02)
The Toarcian oceanic anoxic event (T-OAE; ∼ 183 million y ago) is possibly the most extreme episode of widespread ocean oxygen deficiency in the Phanerozoic, coinciding with rapid atmospheric pCO2 increase and significant loss of biodiversity in marine faunas. The...
Rossana Sidari et al.
International journal of food microbiology, 189, 146-152 (2014-08-26)
Polyphenols are a major component of wine grapes, and contribute to color and flavor, but their influence upon yeast growth forms has not been investigated. In this work we have studied the effect of polyphenols on the ability of natural...
Vaneet Saini et al.
Angewandte Chemie (International ed. in English), 52(43), 11206-11220 (2013-10-10)
Ethylene, the simplest alkene, is the most abundantly synthesized organic molecule by volume. It is readily incorporated into transition-metal-catalyzed carbon-carbon bond-forming reactions through migratory insertions into alkylmetal intermediates. Because of its D2h symmetry, only one insertion outcome is possible. This...
Kristiina Karhu et al.
Nature, 513(7516), 81-84 (2014-09-05)
Soils store about four times as much carbon as plant biomass, and soil microbial respiration releases about 60 petagrams of carbon per year to the atmosphere as carbon dioxide. Short-term experiments have shown that soil microbial respiration increases exponentially with...
Ying Ding et al.
Environmental technology, 35(13-16), 1962-1970 (2014-06-25)
The presence of disinfection by-products, such as trihalomethanes and haloacetic acids in water, is believed to be harmful to human health. In this work, mesoporous carbon was synthesized with the evaporation-induced self-assembly method and employed to evaluate the effects of...
Christophe A Marquette et al.
Biosensors & bioelectronics, 19(5), 433-439 (2003-11-19)
A multifunctional bio-sensing chip was designed based on the electrochemiluminescent (ECL) detection of enzymatically produced hydrogen peroxide. Six different oxidases specific for choline, glucose, glutamate, lactate, lysine and urate were non-covalently immobilised on imidodiacetic acid chelating beads (glucose oxidase only)...
Mikko Metsä-Ketelä et al.
Current opinion in chemical biology, 17(4), 562-570 (2013-07-28)
Pyranonaphthoquinones synthesized by Streptomyces bacteria via type II polyketide pathways are aromatic compounds build around a common three-ring structure, which is composed of pyran, quinone and benzene rings. Over the years, actinorhodin in particular has served as a model compound...
Cancer treatment: Sharp shooters.
Vivien Marx
Nature, 508(7494), 133-138 (2014-04-04)
Sebastian Schnell et al.
Environmental monitoring and assessment, 187(1), 4197-4197 (2014-12-18)
In contrast to forest trees, trees outside forests (TOF) often are not included in the national monitoring of tree resources. Consequently, data about this particular resource is rare, and available information is typically fragmented across the different institutions and stakeholders...
Anton A Toutov et al.
Nature, 518(7537), 80-84 (2015-02-06)
Heteroaromatic compounds containing carbon-silicon (C-Si) bonds are of great interest in the fields of organic electronics and photonics, drug discovery, nuclear medicine and complex molecule synthesis, because these compounds have very useful physicochemical properties. Many of the methods now used...
Sergio Navalon et al.
ChemSusChem, 4(12), 1712-1730 (2011-12-14)
The Fenton reaction is widely used for remediation of waste water and for the degradation of organic pollutants in water. Currently, there is considerable interest to convert the classical Fenton reaction, which consumes stoichiometric amounts of iron(II) salts, into a...
Luis F Jover et al.
Nature reviews. Microbiology, 12(7), 519-528 (2014-06-17)
In marine environments, virus-mediated lysis of host cells leads to the release of cellular carbon and nutrients and is hypothesized to be a major driver of carbon recycling on a global scale. However, efforts to characterize the effects of viruses...
D J McComas et al.
Proceedings of the National Academy of Sciences of the United States of America, 88(21), 9598-9602 (1991-11-01)
Global imaging of the magnetospheric charged particle population can be achieved by remote measurement of the neutral atoms produced when magnetospheric ions undergo charge exchange with cold exospheric neutral atoms. Previously suggested energetic neutral atom imagers were only able to...
Anna Iliadi et al.
American journal of orthodontics and dentofacial orthopedics : official publication of the American Association of Orthodontists, its constituent societies, and the American Board of Orthodontics, 145(4), 425-433 (2014-04-08)
The aim of this study was to assess the effect of intraoral aging on the setting status of a resin composite and a glass ionomer adhesive, relative to control specimens stored in water. Metallic brackets were bonded with resin composite...
Barney A Geddes et al.
Canadian journal of microbiology, 60(8), 491-507 (2014-08-06)
A large proportion of genes within a genome encode proteins that play a role in metabolism. The Alphaproteobacteria are a ubiquitous group of bacteria that play a major role in a number of environments. For well over 50 years, carbon...
Hongyan Song et al.
Journal of nanoscience and nanotechnology, 14(2), 1799-1810 (2014-04-23)
As a novel functional material, carbon nanofiber has many interesting applications in the chemical industry, material science, and energy storage fields. Chemical vapor dispersion and carbonization polymer nanofibers are the two important routes to synthesize carbon nanofibers. In this mini-review...
Masahiko Hayashi
Chemical record (New York, N.Y.), 8(4), 252-267 (2008-08-30)
This paper describes the utility of an activated carbon-molecular oxygen system, not only in the oxidation of benzylic and allylic alcohols, but also in the direct carbonylation at the benzylic position. The preparation of a variety of heteroaromatic and aromatic...