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Metformin and respiratory chain complex I: the last piece of the puzzle?

01-11-2014 | Fontaine E, Biochemical Journal, 2014

Metformin is the most widely prescribed drug used to treat patients affected by Type2 diabetes. Metformin has also been shown to prevent some forms of cell death; however, evidence suggests that it may have anti-neoplastic properties. All of these effects have been attributed to complex I ...

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NTBI unveiled by chelatable fluorescent beads

01-11-2014 | Sebastiani G; Pantopoulos K, Biochemical Journal, 2014

Non-transferrin-bound iron (NTBI) emerges in plasma of patients with systemic iron overload, but has also been documented in further pathological conditions. Quantification of NTBI can be useful for diagnosis and management of these disorders. However, currently available detection methods are ...

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Dual-view plane illumination microscopy for rapid and spatially isotropic imaging

01-11-2014 | Abhishek Kumar; Yicong Wu; Ryan Christensen; Panagiotis Chandris; William Gandler; Evan McCreedy; Alexandra Bokinsky ..., Nature Protocols, 2014

Nature Protocols 9, 2555 (2014). doi:10.1038/nprot.2014.172 Authors: Abhishek Kumar, Yicong Wu, Ryan Christensen, Panagiotis Chandris, William Gandler, Evan McCreedy, Alexandra Bokinsky, Daniel A Colón-Ramos, Zhirong Bao, Matthew McAuliffe, Gary Rondeau & Hari Shroff We ...

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Copper‐Catalyzed Propargylic Substitution of Dichloro Substrates: Enantioselective Synthesis of Trisubstituted Allenes and Formation of Propargylic Quaternary Stereogenic Centers

20-10-2014 | Hailing Li, David Grassi, Laure Guénée, Thomas Bürgi, Alexandre Alexakis, Chemistry - A European Journal, 2014

Abstract An easy and versatile Cu‐catalyzed propargylic substitution process is presented. Using easily prepared prochiral dichloro substrates, readily available Grignard reagents together with catalytic amount of copper salt and chiral ligand, we accessed a range of synthetically interesting ...

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Hydroarylations of Heterobicyclic Alkenes through Rhodium‐Catalyzed Directed CH Functionalizations of S‐Aryl Sulfoximines

20-10-2014 | Wanrong Dong, Kanniyappan Parthasarathy, Ying Cheng, Fangfang Pan, Carsten Bolm, Chemistry - A European Journal, 2014

Abstract Rhodium‐catalyzed directed CH‐functionalizations have been used in hydroarylations of heterobicyclic alkenes with NH‐sulfoximines. Unexpectedly, the bicyclic framework is retained, resulting in the formation of addition products being attractive intermediates for functionalized ...

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A Dehydratase Domain in Ambruticin Biosynthesis Displays Additional Activity as a Pyran‐Forming Cyclase

20-10-2014 | Gesche Berkhan, Frank Hahn, Angewandte Chemie International Edition, 2014

Abstract Hydropyran rings are a common structural motif in reduced polyketides. Information on their biosynthetic formation and particularly the biochemical characterization of the responsible enzymes has only been reported in few cases. The dehydratase domain AmbDH3 from the ambruticin ...

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Positive lymph‐node breast cancer patients: Activation of NF‐κB in tumor associated leukocytes stimulates cytokines secretion that promotes metastasis via CC‐chemokine receptor CCR7

18-10-2014 | Eslam A. El‐Ghonaimy, Mohamed El‐Shinawi, Sherif A. Ibrahim, Hisham El‐Ghazaly, Reda Abd‐El‐Tawab, M. Akram Nouh, Ta ..., FEBS Journal, 2014

Abstract Tumor metastasis to lymph node is the most deadly cause among breast cancer patients. Herein we investigated the molecular mechanism by which the tumor associated leukocytes (TALs) mediates lymph node metastasis. The density of different leukocytes subtypes infiltrating the tumor ...

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Reaction Kinetics of Carbon Dioxide (CO2) Absorption in Sodium Salts of Taurine and Proline Using a Stopped‐Flow Technique

18-10-2014 | Ahmed Sodiq, Aravind V. Rayer, Akinola A. Olanrewaju, Mohammad R. M. Abu Zahra, International Journal of Chemical Kinetics, 2014

ABSTRACT The pseudo–first‐order reaction rate constants (k0, s−1) for the reaction of carbon dioxide in aqueous solutions of sodium taurate (NaTau) and sodium prolinate (NaPr) were measured using a stopped‐flow technique at a temperature range of 298–313 K. The solutions concentration varied ...

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Synthesis of Pyridine Chitosan and its Protonic Conductivity

18-10-2014 | Yingxin Deng, Brett A. Helms, Marco Rolandi, Journal of Polymer Science Part A: Polymer Chemistry, 2014

The synthesis of a positively charged and water soluble chitosan derivative from chitosan is presented.

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Microwave processing of syntactic foam from an expandable thermoset/thermoplastic mixture

18-10-2014 | Yifeng Hong, Xudong Fang, Donggang Yao, Polymer Engineering and Science, 2014

In this work, a microwave expansion process to produce thermoset‐matrix syntactic foam containing thermoplastic foam beads was designed and developed. Expandable polystyrene (EPS) microspheres and epoxy resin were chosen as a model material system. This process is featured with a capability to ...

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