نتایج جستجو برای: peg concentration

تعداد نتایج: 395749  

Journal: :Applied and environmental microbiology 1992
J Frings E Schramm B Schink

In extracts of polyethylene glycol (PEG)-grown cells of the strictly anaerobically fermenting bacterium Pelobacter venetianus, two different enzyme activities were detected, a diol dehydratase and a PEG-degrading enzyme which was characterized as a PEG acetaldehyde lyase. Both enzymes were oxygen sensitive and depended on a reductant, such as titanium citrate or sulfhydryl compounds, for optima...

2015
Nahideh Gharehaghaji Mahmood Nazarpoor Hodaiseh Saharkhiz

BACKGROUND Ultrasmall superparamagnetic iron oxide (USPIO) nanoparticles are used as blood pool contrast agent for magnetic resonance angiography and perfusion imaging. Our aim in this study was to investigate the effect of the two coating types of iron oxide nanoparticles on the relationship between nanoparticles concentration and signal intensity (SI) in T1-weighted MR images. METHODS Diffe...

Journal: :Analytical chemistry 2014
Hongyun Niu Saihua Wang Zhen Zhou Yurong Ma Xunfeng Ma Yaqi Cai

In this work, we have developed a novel sensing strategy employing mixed poly(ethylene glycol)-terminated (PEG-thiols) and perfluoroalkyl-terminated (F-thiols) alkanethiols modified gold nanoparticles (Au@PEG-F NPs) as a probe to detect perfluorinated compounds (PFCs) from water samples. PEG-thiols with high density and long carbon chains make the Au NPs probe well-dispersed in solution and sta...

2013
Noor Muhammad Nadezda Kryuchkova Tamara Dworeck Francisco Rodríguez-Ropero Marco Fioroni

An EGFP construct interacting with the PIB1000-PEG6000-PIB1000 vesicles surface reported a ~2-fold fluorescence emission enhancement. Because of the constructs nature with the amphiphilic peptide inserted into the PIB core, EGFP is expected to experience a "pure" PEG environment. To unravel this phenomenon PEG/water solutions at different molecular weights and concentrations were used. Already ...

Journal: :Biomicrofluidics 2012
Zongbin Liu Lidan Xiao Baojian Xu Yu Zhang Arthur Ft Mak Yi Li Wing-Yin Man Mo Yang

Precisely controlling the spatial distribution of biomolecules on biomaterial surface is important for directing cellular activities in the controlled cell microenvironment. This paper describes a polydimethylsiloxane (PDMS) gradient-generating microfluidic device to immobilize the gradient of cellular adhesive Arg-Gly-Asp (RGD) peptide on poly (ethylene glycol) (PEG) hydrogel. Hydrogels are fo...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2011
D B Knowles Andrew S LaCroix Nickolas F Deines Irina Shkel M Thomas Record

Small solutes affect protein and nucleic acid processes because of favorable or unfavorable chemical interactions of the solute with the biopolymer surface exposed or buried in the process. Large solutes also exclude volume and affect processes where biopolymer molecularity and/or shape changes. Here, we develop an analysis to separate and interpret or predict excluded volume and chemical effec...

Journal: :Magnetic resonance in medicine 2007
Aaron M Mohs Thanh Nguyen Eun-Kee Jeong Yi Feng Lyska Emerson Yuda Zong Dennis L Parker Zheng-Rong Lu

The purpose of this study was to investigate the effect of PEGylation of novel biodegradable macromolecular polydisulfide Gd(III) complexes, gadolinium diethylenetriaminepentaacetate (GdDTPA) cystine copolymers (GDCP), on their pharmacokinetics and long-term Gd(III) tissue retention, and to demonstrate the potential application of PEGylated GDCP (PEG-GDCP) for MR angiography (MRA). The pharmaco...

Eskander Omidinia, Hamid Shahbaz Mohammadi

Aqueous two-phase systems (ATPS) have  emerged as a powerful extraction method for the downstream processing of bio-molecules. The aim of this work was to investigate the possibility of utilizing ATPS for the separation of recombinant Bacillus sphaericus phenylalanine dehydrogenase (PheDH). Polyethylene glycol (PEG) and ammonium sulfate systems were selected for our experi...

Considering the high water requirement of grass during growth stages and the limitation of irrigation sources, it is important to find a suitable way to reduce the water requirement of the lawns as cover plants used in the Landscape. The purpose of this study was to investigate the effect of 2,4,5-T on the induction of callus from the hypocotyl explant in Kentucky bluegrass, induce in vitro dro...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید