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Keyword:'292753'
Showing 1-26 of 26 results for "

292753

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Yukio Nagasaki et al.
Journal of colloid and interface science, 309(2), 524-530 (2007-03-21)
Poly(ethylene glycol) possessing pentaethylenehexamine at one end (N6-PEG) was prepared via a reductive amination reaction of aldehyde-ended PEG with pentaethylenehexamine. Using N6-PEG, an antibody/PEG co-immobilized surface was constructed on magnetic particles via an active ester reaction method. After immobilization of
Simplified method for synthesizing ampholytes suitable for use in isoelectric focusing of immunoglobulins in agarose gels.
S Binion et al.
Analytical biochemistry, 112(2), 362-366 (1981-04-01)
Sylvain Prévost et al.
Biomacromolecules, 12(12), 4272-4282 (2011-11-15)
Polyplexes of short DNA-fragments (300 b.p., 100 nm) with tailor-made amine-based polycations of different architectures (linear and hyperbranched) were investigated in buffer solution as a function of the mixing ratio with DNA. The resulting dispersed polyplexes were characterized using small-angle
Rahman Bikas et al.
Dalton transactions (Cambridge, England : 2003), 48(36), 13799-13812 (2019-09-05)
Two new trinuclear manganese complexes, [Mn3(L1)(μ-OCH3)2(N3)2]·CH3OH (1) and [Mn3(L2)(μ-OCH3)2(N3)2]·CH3OH (2), have been obtained from the reaction of Mn(OAc)2 4H2O, NaN3 and the preformed N6O4-donor H4L1 or H4L2 compartmental ligands, which are synthesized via Schiff base condensation of pentaethylenehexamine with 2-hydroxybenzaldehyde
Insa Rapp et al.
Analytica chimica acta, 976, 1-13 (2017-06-04)
A rapid, automated, high-throughput analytical method capable of simultaneous analysis of multiple elements at trace and ultratrace levels is required to investigate the biogeochemical cycle of trace metals in the ocean. Here we present an analytical approach which uses a
Shigehiro Kagaya et al.
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry, 26(4), 515-518 (2010-04-23)
Solid phase extraction using a mini cartridge packed with 22 mg of chelate resin immobilizing carboxymethylated pentaethylenehexamine was successfully utilized for separation/preconcentration of cadmium in water samples prior to liquid electrode plasma atomic emission spectrometric (LEP-AES) determination. The combined method
Haijun Yu et al.
Biomacromolecules, 12(6), 2039-2047 (2011-04-16)
Aim of this study was the site-specific conjugation of an epidermal growth factor (EGF)-polyethylene glycol (PEG) chain by click chemistry onto a poly(amido amine) (PAMAM) dendron, as a key step toward defined multifunctional carriers for targeted gene delivery. For this
Solmaz Pirouz et al.
The journal of physical chemistry. B, 118(14), 3899-3911 (2014-03-19)
A novel methodology based on fluorescence quenching measurements is introduced to determine quantitatively the amine content of polyisobutylene succinimide (PIBSI) dispersants used as engine oil-additives. To this end, a series of five PIBSI dispersants were prepared by reacting 2 mol
Chuan Yang et al.
The journal of physical chemistry. B, 113(3), 682-690 (2009-01-16)
This paper reports the synthesis and the studies of the thermoresponsive behavior of a new cationic polyrotaxane consisting of multiple pentaethylenehexamine-grafted alpha-cyclodextrin (PEHA-grafted-alpha-CD) rings threaded on a poly(propylene oxide)-poly(ethylene oxide)-poly(propylene oxide) (PPO-PEO-PPO) triblock copolymer. The PEHA-grafted alpha-CD rings were threaded
K Yoshinari et al.
Nucleic acids symposium series, (27)(27), 47-48 (1992-01-01)
Oligoamines as catalytic sites for RNA hydrolysis are attached to 5'-end of [dT]16 using urethane bond. The [dT]16-pentaethylenehexamine hybrid promptly hydrolyzes poly[A] at pH 8, 50 degrees C. Definite importance of the complexation between the poly[A] and the [dT]16 moiety
Lisa E Prevette et al.
Biomacromolecules, 11(2), 326-332 (2010-01-12)
Previously, a series of three poly(amidoamine)s was designed and synthesized by polymerizing oxylate, succinate, or adipate groups with pentaethylenehexamine. These resulting polymers (named O4, S4, and A4, respectively) were created as models to poly(glycoamidoamine) nucleic acid delivery agents to understand
Wiebke Fischer et al.
Macromolecular bioscience, 11(12), 1736-1746 (2011-10-27)
Two photo-responsive core/shell nanoparticles based on hyperbranched polyglycerol (hPG) are synthesized for controlled release of DNA. The shell is composed either of bis-(3-aminopropyl)methylamine (AMPA) or pentaethylenehexamine (PEHA) derivatives and is attached to the hPG core with a photo-responsive o-nitrobenzyl linker.
M M Jones et al.
Journal of toxicology and environmental health, 48(1), 71-80 (1996-05-01)
The relative abilities of a series of acyclic polyamine chelating agents containing only nitrogen donors (N-donors) to induce the urinary excretion of cadmium has been examined in the rat. The compounds examined include triethylenetetramine dihydrochloride (TRIEN), tris(2-aminoethyl)amine trihydrochloride (TREN), tetraethylenepentamine
William S Boyle et al.
Biomacromolecules, 18(1), 56-67 (2016-12-20)
Improving the delivery of nucleic acids to diverse tissue types in culture is important for translating genome editing for regenerative cell therapies. Herein, we examine the effect of transfection media additives, such as the sulfated glycosaminoglycan heparin, in dramatically increasing
Feng Wang et al.
Bioresource technology, 102(20), 9374-9379 (2011-08-27)
α-Amylase from Aspergillus oryzae was covalently immobilized onto polystyrene pellets with pentaethylenehexamine (PS-PEHA-Ald) and pentaethylene glycol (PS-PG-Ald) carrying a terminal aldehyde group. Optimum immobilization occured at pH 8.0 and 25 °C, and at pH 7.0 and 35 °C for PS-PEHA-Ald
Shigehiro Kagaya et al.
Talanta, 147, 342-350 (2015-11-26)
The effect of the molecular weight of polyethyleneimine (PEI), defined as a compound having two or more ethyleneamine units, and of its carboxymethylation rate (CM/N), represented by the ratio of ion-exchange capacity to the amount of N on the resin
Gunniya Hariyanandam Gunasekar et al.
Inorganic chemistry, 58(6), 3717-3723 (2019-03-02)
Today, one of the most imperative targets to realize the conversions of CO2 in industry is the development of practically viable catalytic systems that demonstrate excellent activity, selectivity, and durability. Herein, a simple heterogeneous Ru(III) catalyst is prepared by immobilizing
Tianchi Cao et al.
Physical chemistry chemical physics : PCCP, 19(23), 15160-15171 (2017-06-01)
Time-resolved dynamic light scattering is used to measure absolute heteroaggregation rate coefficients and the corresponding stability ratios for heteroaggregation between amidine and sulfate latex particles. These measurements are complemented by the respective quantities for the homoaggregation of the two systems
Hua Wei et al.
Biomacromolecules, 14(1), 275-284 (2012-12-18)
Polyethylenimine (PEI) is one of the most broadly used polycations for gene delivery due to its high transfection efficiency and commercial availability but materials are cytotoxic and often polydisperse. The goal of current work is to develop an alternative family
Yan Ping et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 203, 139-146 (2018-06-05)
Pentaethylenehexamine and d-penicillamine co-functionalized graphene quantum dots (PEHA-GQD-DPA) was made via one two-step thermal pyrolysis. The resulting PEHA-GQD-DPA is composed of the graphene sheets with an average size of 3.16 nm and the rich of functional groups. It gives an ultra
Zhe Xu et al.
International journal of biological macromolecules, 130, 117-124 (2019-02-27)
Nitrilase-catalyzed regioselective hydrolysis of 1-cyanocyclohexaneacetonitrile (1-CHAN) is a green and efficient approach for the preparation of 1-cyanocyclohexaneacetic acid (1-CHAA), a key precursor for the synthesis of gabapentin. Here, a mesoporous biosilica particles prepared by the ethyleneamine-mediated silicification have been used
Hong Li et al.
Journal of drug targeting, 26(5-6), 466-473 (2018-01-30)
RX-0201 is an antisense oligonucleotide (ASO) against Akt1 currently in clinical trial for metastatic renal cancer. To improve the delivery of RX-0201 using folate receptor-targeted lipid-albumin nanoparticles (F-LAN). F-LAN were synthesized with the composition of DOTAP/soyPC/TPGS/folate-PEG-DSPE (25:70:4:1 m/m), a cationic human
Peter J Baker et al.
Macromolecular bioscience, 14(11), 1619-1626 (2014-08-27)
We report the encapsulation of three different proteases in bioinspired silica. Silica particles were formed under mild reaction conditions using cationic amine-rich ethyleneamines as initiators, which resulted in aggregations of nanoscale spheres. Following encapsulation, the proteases were characterized for their
Amaraporn Wongrakpanich et al.
Pharmaceutical development and technology, 18(5), 1255-1258 (2012-01-13)
Poly(galactaramidoamine) (PGAA) is a cationic co-polymer of dimethyl-meso-galactarate and pentaethylenehexamine. PGAA electrostatically complexes with plasmid DNA (pDNA) to form nano-sized particles. In this study, we show that PGAA-pDNA polyplexes generate high transfection efficiencies in human embryonic kidney (HEK293) and murine
Lucas Vu et al.
Theranostics, 2(12), 1160-1173 (2013-02-06)
A focused library of twenty-one cationic poly(amino ethers) was synthesized following ring-opening polymerization of two diglycidyl ethers by different oligoamines. The polymers were screened in parallel for plasmid DNA (pDNA) delivery, and transgene expression efficacies of individual polymers were compared
Xiaofei Yuan et al.
Analytical chemistry, 81(24), 10097-10105 (2009-11-17)
Immunolatex particles (LAmP-s), which were prepared by covalently co-immobilizing antiferritin and a mixture of pentaethylenehexamine-ended poly(ethylene glycol) (N6-PEG) of two different chain lengths onto the surface of polystyrene submicroparticles, were formulated with various antiferritin loads. Following the quantification of the
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