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3.028 Aktuelle Fachpublikationen zum Thema temperature

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Coordination polymers of uranium (IV) terephthalates

18.11.2014 | Clément Falaise; ayalew assen; ionut mihalcea; Christophe Volkringer; adel mesbah; Nicolas Dacheux; Thierry Loiseau, Dalton Transactions, 2014

A series of tetravalent uranium terephthalates has been solvothermally synthesized in N,N-dimethylformamide solvent (DMF) at temperature 100-150°C with different water amounts. Composition diagrams have been determined for U4+ metallic cation in the presence of terephthalic acid, and their ...

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Light-induced, site-selective isomerization of glyoxylic acid in solid xenon

16.11.2014 | Author(s): Adriana Olbert-Majkut , Maria Wierzejewska , Jan Lundell, Chemical Physics Letters, 2014

Publication date: 25 November 2014 Source:Chemical Physics Letters, Volumes 616–617 Author(s): Adriana Olbert-Majkut , Maria Wierzejewska , Jan Lundell The isomerization of glyoxylic acid (GA) and its water complex was studied in a low temperature xenon matrix. The aim of these studies ...

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Investigation of the Enantioselectivity of Tetramethylammonium L‐hydroxyproline Ionic Liquid as a Novel Chiral Ligand in Ligand‐Exchange CE and Ligand‐Exchange MEKC

14.11.2014 | Ruijuan Liu, Yingxiang Du, Jiaquan Chen, Qi Zhang, Shuaijing Du, Zijie Feng, Chirality, 2014

ABSTRACT Chiral ionic liquids (ILs) have drawn more and more attention in separation science; however, only a few papers focused on the application of chiral ILs as chiral ligands in LE‐CE. In this article, a novel amino acid ionic liquid (AAIL), tetramethylammonium L‐hydroxyproline ...

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Molecules, Vol. 19, Pages 18705-18720: Removing Tannins from Medicinal Plant Extracts Using an Alkaline Ethanol Precipitation Process: A Case Study of Danshen Injection

14.11.2014 | Gong, Xingchu ; Li, Yao ; Qu, Haibin, Molecules, 2014

The alkaline ethanol precipitation process is investigated as an example of a technique for the removal of tannins extracted from Salviae miltiorrhizae Radix et Rhizoma for the manufacture of Danshen injection. More than 90% of the tannins can be removed. However, the recoveries of danshensu, ...

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Multiple‐Stimulus‐Responsive Supramolecular Gels of Two Components and Dual Chiroptical Switches

13.11.2014 | Wangen Miao, Long Qin, Dong Yang, Xue Jin, Minghua Liu, Chemistry - A European Journal, 2014

Abstract A new class of L‐glutamic gelators, LG12(CH2)nCOOH, containing different lengths of methylene spacer were synthesized. It was found that the gelation ability of these compounds themselves was very weak. However, when another compound, p‐xylylenediamine (XEA), was introduced, the ...

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Sensors, Vol. 14, Pages 21453-21465: Effect of CSA Concentration on the Ammonia Sensing Properties of CSA-Doped PA6/PANI Composite Nanofibers

13.11.2014 | Pang, Zengyuan ; Fu, Jiapeng ; Lv, Pengfei ; Huang, Fenglin ; Wei, Qufu, Sensors, 2014

Camphor sulfonic acid (CSA)-doped polyamide 6/polyaniline (PA6/PANI) composite nanofibers were fabricated using in situ polymerization of aniline under different CSA concentrations (0.02, 0.04, 0.06, 0.08 and 0.10 M) with electrospun PA6 nanofibers as templates. The structural, morphological and ...

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A Computational Study on Lewis Acid-Catalyzed Diastereoselective Acyclic Radical Allylation Reactions with Unusual Selectivity Dependence on Temperature and Epimer Precursor

12.11.2014 | Miglena K. Georgieva; A. Gil Santos, The Journal of Organic Chemistry, 2014

In stereoselective radical reactions, it is accepted that the configuration of the radical precursor has no impact on the levels of stereoinduction, as a prochiral radical intermediate is planar, with two identical faces, independently of its origin. However, Sibi and Rheault (J. Am. Chem. Soc. ...

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Understanding the Role of H-Bonding in Self-Aggregation in Organic Liquids by Fatty Acid Amphiphiles with a Hydrocarbon Tail Containing Different H-Bonding Linker Groups

12.11.2014 | Amrita Pal; Rita Das Mahapatra; Joykrishna Dey, Langmuir, 2014

In this work, we have designed and synthesized a series of fatty acid amphiphiles that have the same structural skeleton but different hydrogen-bonding (H-bonding) functional groups in the hydrocarbon chain. To examine the importance of the H-bonding interaction on the formation of a ...

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Molecules, Vol. 19, Pages 18448-18464: Augmenting the Antifungal Activity of an Oxidizing Agent with Kojic Acid: Control of Penicillium Strains Infecting Crops

12.11.2014 | Kim, Jong H.; Chan, Kathleen L., Molecules, 2014

Oxidative treatment is one of the strategies for preventing Penicillium contamination in crops/foods. The antifungal efficacy of hydrogen peroxide (H2O2; oxidant) was investigated in Penicillium strains by using kojic acid (KA) as a chemosensitizing agent, which can enhance the susceptibility of ...

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An Integrated Imaging Probe Design: The Synthesis of 99mTc/Re‐Containing Macrocyclic Peptide Scaffolds

11.11.2014 | Jennifer L. Hickey, Emily J. Simpson, Jinqiang Hou, Leonard G. Luyt, Chemistry - A European Journal, 2014

Abstract β‐Sheets account for over 30 % of all secondary structural conformations found in proteins. The intramolecular hydrogen bonding that exists between the two peptide strands is imperative in maintaining this secondary structure. With the proper design, cyclic peptides may act as ...

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