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Automated Sample Pretreatment of Environmental
Bernard Sheldon,1 Rosanne Slingsby,1 and Rida Al-Horr2

Matrix elimination is a method of sample preparation that removes certain matrix species from a sample, typically by specifically binding matrix species to a solid phase. Interfering compounds can be removed before the analyte determination, thus improving the quality of results as well as lengthening the lifetime of consumables such as columns.

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Five noncovalent peptidic ligands show different affinity rankings in solution and gas phase
Andrey Dyachenko , Michael Goldflam , Marta Vilaseca , Ernest Giralt

Stability of noncovalent complexes of VEGF protein with 5 peptidic ligands is studied. Experiments were conducted in solution (NMR CSP, ITC) and in gas phase (CID TOF MS). Each ligand differs from others in chirality of one amino acid. It was shown, that trend of stability of the studied noncovalent complexes is reversed in the gas phase relatively to the solution. An explanation of this behavior is presented.

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Study of volumetric oxygen transfer coefficient in a Taylor vortex flow bioreactor
Patrícia Ap. Santiago, Cláudio A. T. Suazo, Roberto C. Giordano

An inadequate transfer of oxygen can lead to rapid changes in cell physiology, metabolism, and cell death. In this work, the KLa is evaluated in a Taylor vortex flow bioreactor and a mass transfer correlation is proposed. The experimental conditions employed were: rotational Reynolds number between 244 and 2928, airflow rates varying from 80 mL.min-1 to 550 mL.min-1 and used culture medium DMEM.

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Hyperbaric Bioreactors use with Yarrowia Lipolytica Cultures: Cellular Adaptation to Hyperbaric Conditions
Marlene Lopes, Nelma Gomes, Manuel Mota, Isabel Belo

In this work, a pressurized bioreactor was used for Y. lipolytica batch cultivation under increased air pressure from 1 bar to 6 bar. Cell growth was strongly enhanced by the pressure rise. The increase of oxygen availability caused the induction of the antioxidant enzyme SOD. The pre-growth of Y. lipolytica under increased pressure conditions did not affect the lipase production ability of the cells.

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Adaptive control of glycerol & methanol feeding in recombinant Pichia pastoris cultures: Impact on antibody titre
Filipe Ataíde, Ana Raquel Ferreira, João J. Clemente, António E. Cunha, Rui Oliveira

Pichia pastoris processes for heterolougous protein expression are typically run in three phases: a batch phase, an exponential feeding fed-batch phase and a long oxygen transfer limitation (OTL) phase. The final protein titre is often limited by the oxygen availability in the OTL phase. Here a direct adaptive controller is designed for the OTL phase. The controller was validated in pilot P. pastoris cultivations expressing a single chain antibody fragment (ScFv). This work shows that the propos

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Scalability of heterogeneous MW-heated processes
Mark H.C.L. Dressen, Bastiaan H. P. van de Kruijs, Jan Meuldijk, Jef A. J. M. Vekemans, Lumbertus A. Hulshof

The combination of flow chemistry and microwave heating offers a unique opportunity to scale out heterogeneous microwave-assisted organic reactions. The feasibility of this setup is depending on the presence of a microwave effect, safety issues and energy efficiency.

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Palladium-Catalyzed Three-Component Synthesis of Phenothiazines
Troels Dahl, Christian Wenzel Tornøe, Benny Bang-Andersen, Poul Nielsen and Morten Jørgensen

The formation of aromatic carbon-heteroatom bonds has traditionally been achieved by nucleophilic aromatic substitution or via the copper-mediated Ullman reaction. The palladium-catalyzed formation of aromatic C-N bonds extensively developed by Hartwig and Buchwald has provided a powerful alternative. While the aryl amination reaction is applicable even to aryl chlorides and activated phenols, the analogous C-O and C-S bond forming reactions have attracted less attention.

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High Throughput Microwave Synthesis of Metal Organic Framework (MOF) Libraries
Neil L. Campbell, Jake Grace, Richard W. Dewson, Jean-Noel Rebilly, Darren Bradshaw, Ben Carter, Andrew I. Cooper and Mathew J. Rosseinsky

Metal-organic frameworks (MOFs) are an emerging class of new nano-porous materials of considerable academic and industrial interest due to their potential applications in gas storagechiral separations and catalysis. MOFs are prepared from the self-assembly of metal ions (nodes) and organic ligands (spacers), where the structural topology of the resulting crystalline frameworks is driven by the co-ordination preferences of these nodes and spacers. MOFs offer opportunities not available to more cl

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A new exposure system for the in vitro detection of GHz field effects on neuronal networks
Philipp J. Koester, Jan Sakowski, Werner Baumann, Hans-Walter Glocka, Jan Gimsa

Different ideas exist about possible targets for biological effects of electromagnetic fields (EMF). One of the favourite systems are the membranes of nerve cells, e.g. in the central nervous system. Our aim is to clarify whether EMF exposure may induce athermal effects. In the experiments, direct electrophysiological in vitro measurements are conducted on neuronal networks exposed to EMF, i.e. possible changes in the action potential patterns produced by the networks are detected. The technique

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Scientific News
Injecting New Life into Old Antibiotics
A new fully synthetic way to make a class of antibiotics called macrolides from simple building blocks is set to open up a new front in the fight against antimicrobial drug resistance.
New Cancer Fighters Emerge From Lab
Rice University lab simplifies total synthesis of anti-cancer agent.
Pharmacy on Demand
New, portable system can be configured to produce different drugs.
Safer, Cheaper, Greener and More Efficient System for Organic Synthesis
The new medium not only supports organic synthesis it also produces considerably higher yields of product than pure organic solvents.
Countless New, Cleaner Uses of Methane
Chemists have demonstrated the potential to use methane as a versatile chemical building block with which to make more complex molecules.
New Way to Control Chemical Reactions
Scientists have harnessed static electricity to control chemical reactions for the first time, in a breakthrough that could bring cleaner industry and cheaper nanotechnology.
Tiny 'Flasks' Speed Up Chemical Reactions
Self-assembling nanosphere clusters may improve everything from drug synthesis to drug delivery.
The Manufacturing Challenges of Nanotechnology
Head of NanoManufacturing at the Department of Engineering’s Institute for Manufacturing (IfM) Dr Michaël de Volder explains why manufacturing carbon nanotubes is so difficult – and so important.
New Material Lays Waste to Mercury Pollution
A brand new, dirt cheap, non-toxic polymer that literally sucks mercury out of water and soil is set to become a game changer in the battle against one of the world’s most reviled pollutants.
Shocking New Way to Get the Salt Out
MIT team invents efficient shockwave-based process for desalination of water.
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