نتایج جستجو برای: covalently attachment

تعداد نتایج: 55663  

Journal: :Nature chemistry 2015
Damien Voiry Anandarup Goswami Rajesh Kappera Cecilia de Carvalho Castro e Silva Daniel Kaplan Takeshi Fujita Mingwei Chen Tewodros Asefa Manish Chhowalla

Chemical functionalization of low-dimensional materials such as nanotubes, nanowires and graphene leads to profound changes in their properties and is essential for solubilizing them in common solvents. Covalent attachment of functional groups is generally achieved at defect sites, which facilitate electron transfer. Here, we describe a simple and general method for covalent functionalization o...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2004
Martin Braun Linda Thöny-Meyer

Microperoxidases were initially isolated as peptide fragments containing covalently bound heme and are derived from naturally occurring c-type cytochromes. They are not only used as model compounds but also have potential applications as biosensors, electron carriers, photoreceptors, microzymes, and drugs. In a systematic attempt to define the minimal requirements for covalent attachment of hem...

Journal: :Nucleic acids research 1993
E Fahy G R Davis L J DiMichele S S Ghosh

Polyacrylamide supports, in a range of pore sizes, were investigated as nucleic acid affinity matrices for the detection of target DNA or RNA sequences using a sandwich hybridization format. Bromoacetyl and thiol oligonucleotide derivatives were covalently linked to sulfhydryl- and bromoacetyl-polyacrylamide supports with greater than 95% end-attachment efficiencies. These polyacrylamide-oligon...

Journal: :Journal of the American Chemical Society 2002
Elizabeth R Gillies Jean M J Fréchet

The design and preparation of new polyester dendrimer, poly(ethylene oxide) hybrid systems for drug delivery and related therapeutic applications, are described. These systems consist of two covalently attached polyester dendrons, where one dendron provides multiple functional handles for the attachment of therapeutically active moieties, while the other is used for attachment of solubilizing p...

Journal: :The Biochemical journal 1973
R P Ambler

The amino acid sequence of the cytochrome c' from Alcaligenes sp. N.C.I.B. 11015 (Iwasaki's ;Pseudomonas denitrificans') has been determined. This organism is the only non-photosynthetic bacterium in which the protein has been found. The protein consists of a single polypeptide chain of 127 residues, with a single haem covalently attached to two cysteines. Unlike normal cytochromes c, the haem ...

Journal: :Nanoscale 2012
Alina Chanaewa Beatriz H Juárez Horst Weller Christian Klinke

The attachment of semiconducting nanoparticles to carbon nanotubes is one of the most challenging subjects in nanotechnology. Successful high coverage attachment and control over the charge transfer mechanism and photo-current generation open a wide field of new applications such as highly effective solar cells and fibre-enhanced polymers. In this work we study the charge transfer in individual...

Journal: :The Journal of biological chemistry 1987
D S Horowitz J C Wang

We have identified tyrosine 122 of the A subunit of Escherichia coli DNA gyrase as the tyrosine that becomes covalently bound to DNA when the enzyme breaks the phosphodiester bonds of DNA. The covalent gyrase X DNA complex was isolated following cleavage of the DNA by gyrase in the presence of the gyrase inhibitor oxolinic acid. The active site tyrosine was first mapped to two overlapping pepti...

Journal: :تحقیقات علوم رفتاری 0
مرضیه جهان بخش شعله امیری محمدحسین بهادری حسین مولوی آذر جمشیدی marzieh jahanbakhsh

aim and background: complex nature of children`s affectionate problems requires assessment and usage of modern treatments. the present study aimed to investigate the effects of attachment-based therapy on depression symptoms in girl students of primary school who had attachment problems. methods and materials: this study was an empirical plan with pretest-posttest, follow up and control group. ...

2010
Eva Greganova Manfred Heller Peter Bütikofer

Ethanolamine phosphoglycerol (EPG) represents a protein modification that so far has only been found in eukaryotic elongation factor 1A (eEF1A). In mammals and plants, EPG is covalently attached to two conserved glutamate residues located in domains II and III of eEF1A. In contrast, Trypanosoma brucei eEF1A contains a single EPG attached to Glu362 in domain III. The sequence and/or structural r...

Journal: :Molecules 2015
Efstathia Kougia Maria Tselepi Gavriil Vasilopoulos Georgia Ch Lainioti Nikos D Koromilas Denisa Druvari Georgios Bokias Apostolos Vantarakis Joannis K Kallitsis

In the present work a detailed study of new bacteriostatic copolymers with quaternized ammonium groups introduced in the polymer chain through covalent attachment or electrostatic interaction, was performed. Different copolymers have been considered since beside the active species, the hydrophobic/hydrophilic nature of the co-monomer was also evaluated in the case of covalently attached bacteri...

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