Novel biodegradable poly(amino ester)s containing secondary and tertiary amines in the backbones were obtained from the Michael addition polymerizations of trifunctional amine monomers with diacrylates, and showed high transfection efficiency for the delivery of DNA comparable to those of polyethylenimine (PEI) and low cytotoxicity.

Previous workers identified a magnetically anomalous clay layer deposited on the northern United States Atlantic Coastal Plain during the Paleocene-Eocene Thermal Maximum (PETM). The finding inspired the highly controversial hypothesis that a cometary impact triggered the PETM. Here we present ferromagnetic resonance (FMR), isothermal and anhysteretic remanent magnetization, first order reversa...

A polyethylenimine (PEI) self-assembled monolayer (SAM) is prepared, capable of complexing silver and copper cations and of anchoring silver nanoparticles, exerting antibacterial activity against Escherichia coli and Staphylococcus aureus. Functionalized glassy surfaces have been fully characterized through spectroscopic techniques (UV-Vis spectroscopy, spectroscopic ellipsometry), atomic force...

30% of the chromium ore reserves in world are concentrated Kazakhstan, during processing which large volumes wastewater containing toxic salts, formed. Сhromium is one priority components both terms emission and toxicity (for Cr(VI), maximum permissible concentration 0.05 mg/l). The compounds (III) especially (VI) have a general toxic, allergenic, carcinogenic, mutagenic effect on human body, a...

By using polyethylenimine molecules as the linker, l-cysteine was immobilized onto graphene nanosheets, endowing the biocompatible l-cysteine-functionalized graphene film with the ability for catalytic decomposition of exogenous or endogenous donors to generate nitric oxide, and thus inhibiting the platelet activation and aggregation and reducing platelet adhesion.

Background As we have previously shown that lactosylated polyethylenimine (PEI) is the most efficient glycosylated PEI for gene transfer into human airway epithelial cells in primary culture, we have studied here the role of the lactose residue in the enhancement of gene transfer efficiency observed with lactosylated PEI as compared with unsubstituted PEI in immortalized ( CFTE29ocells) and pri...

Three transfection reagents, Lipofectamine 2000, TransIT-PRO and linear 25 kDa polyethylenimine were evaluated for transient expression of enhanced green fluorescent protein in Chinese hamster ovary cells. TransIT-PRO was found to be more efficient under the examined conditions, but comes at an increased cost compared to the widely used PEI.

Insect cell lines have been widely used in recombinant baculovirus expression systems and transient gene expression studies. Critical to these applications have been the transfection of foreign DNA. This has been frequently done using labor intensive and cytotoxic liposome-based transfection reagents. In the current study we have optimized a new kind of polyethylenimine-based DNA transfection r...

Polysulfonated macromolecules are known to bind selectins, adhesion membrane proteins which are broadly implicated in inflammation. Commercially available branched polyethylenimine (PEI) was reacted with chlorosulfonic acid to generate sulfonated PEI with varying degrees of sulfonation. Remaining unreacted amine groups were then used for straightforward conjugation with pyropheophoribide-a, a n...