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Showing 1-30 of 36 results for "236241" within Papers
Eileen Deng et al.
Molecules (Basel, Switzerland), 20(11), 20131-20145 (2015-11-17)
Macromolecules that possess three-dimensional, branched molecular structures are of great interest because they exhibit significantly differentiated application performance compared to conventional linear (straight chain) polymers. This paper reports the synthesis of 3- and 4-arm star branched polymers via ring opening
Zhiming Zhang et al.
Organic & biomolecular chemistry, 9(24), 8220-8223 (2011-10-13)
A trimer of cholic acid made by linking three cholic acid molecules with pentaerythritol via click chemistry serves as the center of an artificial metallohydrolase after the complexation of the triazole groups with a Zn(2+) ion. The invertible amphiphilic cavity
Chin-Wen Chen et al.
Polymers, 12(9) (2020-09-10)
Bio-based unsaturated poly(butylene adipate-co-butylene itaconate) (PBABI) aliphatic copolyesters were synthesized with pentaerythritol (PE) as a modifier, observing the melting point, crystallization, and glass transition temperatures were decreased from 59.5 to 19.5 °C and 28.2 to -9.1 °C as an increase
Jundong Zhu et al.
Journal of biomedical materials research. Part A, 97(4), 498-508 (2011-04-22)
Folate (FA)-conjugated star-shaped copolymer was prepared as a targeted carrier for anticancer drug delivery by ring-opening polymerization of L-lactide using pentaerythritol (PTL) as an initiator, followed by conjugation with methoxy poly(ethylene glycol) (MPEG) and FA-poly(ethylene glycol) (FA-PEG). The resulting amphiphilic
Annie Malleron et al.
Carbohydrate research, 343(5), 970-976 (2008-02-19)
The 3-sulfated Lewis(a) pentasaccharide was synthesized on multimeric-based polyethylene glycol support. Coupling of O-(2,3,4,6-tetra-O-acetyl-beta-D-galactopyranosyl)-(1-->3)-4,6-di-O-acetyl-2-deoxy-2-phthalimido-beta-D-glucopyranosyl trichloroacetimidate with (2,6-di-O-acetyl-beta-D-galactopyranosyl)-(1-->4)-(2,3,6-tri-O-acetyl-beta-D-glucopyranoside) bound onto the polymer afforded lacto-N-tetraose, which was then regioselectively sulfated at the 3-OH position of the terminal galactose using the stannylene procedure.
Ingo Rekittke et al.
Biochemical and biophysical research communications, 458(2), 246-250 (2015-02-11)
Isoprenoid biosynthesis in many bacteria, plant chloroplasts and parasitic protozoa but not in humans proceeds via the mevalonate independent 2-C-methyl-D-erythritol-4-phosphate (MEP) pathway. Its penultimate reaction step is catalyzed by (E)-1-hydroxy-2-methyl-but-2-enyl-4-diphosphate (HMBPP) synthase (GcpE/IspG) which transforms 2-C-methyl-D-erythritol-2, 4-cyclo-diphosphate (MEcPP) to HMBPP.
Jun Yamashita et al.
The journal of physical chemistry. B, 112(39), 12286-12296 (2008-09-09)
With a view to discovering a new family of lipids that form inverted cubic phases, the aqueous phase behavior of a series of lipids with isoprenoid-type hydrophobic chains has been examined over a temperature range from -40 to 65 degrees
Understanding the dissolution of polyols by ionic liquids using the example of a well-defined model compound.
Zakar Papanyan et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 12(13), 2400-2404 (2011-07-15)
Hussein Al-Mughaid et al.
The Journal of organic chemistry, 71(4), 1390-1398 (2006-02-14)
A nonavalent glycodendrimer bearing terminal alpha-d-mannopyranoside units has been synthesized with a convergent approach. Terminal trivalent mannoside dendrons bearing p-halophenyl ethers were prepared by glycosylation of pentaerythritol derivatives having three 2-hydroxyethyl ether substituents. Two efficient routes were developed for the
Eliska Bílková et al.
International journal of pharmaceutics, 386(1-2), 1-5 (2009-10-31)
A new targeted intravenous conjugate of nystatin with pentaerythritol poly(ethylene glycol)ether has been prepared and characterised (NY(4)-sPEG, M=25 160). The conjugate contains a beta-d-glucopyranoside molecular switch sensitive to beta-glucosidases (E.C., which are specifically present in the enzyme outfit of fungal
Chongqi Shou et al.
Se pu = Chinese journal of chromatography, 22(3), 273-276 (2005-02-17)
A series of hyperbranched poly(amine-ester)s were synthesized using one-step and pseudo-step procedure respectively, and their molecular structures were characterized by IR, hydroxyl value and viscosity. These polymers were coated on the inner surface of the fused-silica capillaries in a chemical
Tao Tu et al.
The Journal of organic chemistry, 73(14), 5255-5263 (2008-06-19)
Molecular scaffolds that have well-defined geometries, are easy to synthesize and functionalize, and can hold attached sites of molecular recognition in suitable orientations are useful tools in various areas of science and technology. The utility of the tetraphenyl ether of
Maria Manoli et al.
Journal of the American Chemical Society, 130(33), 11129-11139 (2008-07-26)
The syntheses and structures of two decametallic mixed-valent Mn supertetrahedra using 2-amino-2-methyl-1,3-propanediol (ampH2), two decametallic mixed-valent Mn planar discs using 2-amino-2-methyl-1,3-propanediol (ampH2) and 2-amino-2-ethyl-1,3-propanediol (aepH2), and a tetradecametallic mixed-valent Mn planar disc using pentaerythritol (H4peol) are reported. The decametallic complexes
Da Huang et al.
Biomaterials, 52, 417-425 (2015-03-31)
Bone tuberculosis (TB) is one of the most common extrapulmonary TB. Effective integration of chemotherapy and bone regeneration is an optimal solution for bone TB therapy. Herein, we produce a composite scaffold drug delivery system fabricated with an isoniazid conjugated
Hui Lin et al.
Journal of chromatography. A, 1379, 34-42 (2014-12-30)
A facile approach based on thiol-methacrylate Michael addition click reaction was developed for construction of porous hybrid monolithic materials. Three hybrid monoliths were prepared via thiol-methacrylate click polymerization by using methacrylate-polyhedral oligomeric silsesquioxane (POSS) (cage mixture, n=8, 10, 12, POSS-MA)
Charlène Pouech et al.
Journal of chromatography. A, 1423, 111-123 (2015-11-12)
Polymer items are extensively present in the human environment. Humans may be consequently exposed to some compounds, such as additives, incorporated in these items. The objective of this work is to assess the human exposure to the main additives such
Michael C Hacker et al.
Biomacromolecules, 9(6), 1558-1570 (2008-05-17)
In this study, we synthesized and characterized a series of macromers based on poly( N-isopropylacrylamide) that undergo thermally induced physical gelation and, following chemical modification, can be chemically cross-linked. Macromers with number average molecular weights typically ranging from 2000-3500 Da
Mohamed Touaibia et al.
Chemical communications (Cambridge, England), (4)(4), 380-382 (2007-01-16)
Several oligomannoside clusters having a hundred-fold increase in affinities toward E. coli were synthesized by Cu(I)-catalyzed [1,3]-dipolar cycloadditions using pentaerythritol scaffolds bearing either alkyne or azide functionalities.
Matthias Onghena et al.
Journal of mass spectrometry : JMS, 50(11), 1234-1244 (2015-10-28)
This work presents a strategy for elucidation of unknown migrants from plastic food contact materials (baby bottles) using a combination of analytical techniques in an untargeted approach. First, gas chromatography (GC) coupled to mass spectrometry (MS) in electron ionisation mode
Katie L Poetz et al.
Biomacromolecules, 16(5), 1650-1659 (2015-04-14)
Surface eroding and semicrystalline polyanhydrides, with tunable erosion times and drug delivery pharmacokinetics largely dictated by erosion, are produced easily with thiol-ene "click" polymerization. This strategy yields both linear and cross-linked network polyanhydrides that are readily and fully cured within
Alexis Mollard et al.
Inorganic chemistry, 45(25), 10172-10179 (2006-12-05)
A new tricarborane building block based on pentaerythritol was prepared for applications in boron neutron capture therapy (BNCT). Its X-ray single-crystal structure revealed a high degree of steric congestion. To enable the attachment of the building block to other moieties
Andrew D Burnett et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 11(2), 368-378 (2010-01-06)
The terahertz frequency spectrum of pentaerythritol tetranitrate (PETN) is calculated using Discover with the COMPASS force field, CASTEP and PWscf. The calculations are compared to each other and to terahertz spectra (0.3-3 THz) of crystalline PETN recorded at 4 K.
Aya Shibata et al.
Nucleic acids symposium series (2004), (50)(50), 73-74 (2006-12-08)
This paper describes the synthesis and properties of double-stranded antisense oligonucleotides connected with a pentaerythritol linker. We found that double-stranded antisense oligonucleotides with aminomethyl residues have high affinity for single-stranded DNA or RNA in buffer solutions both with and without
Pingfan Wu et al.
Chemical communications (Cambridge, England), 47(19), 5557-5559 (2011-04-06)
We have demonstrated that a pentaerythritol-derivatized hexavanadate can be easily esterified with acid anhydrides using 4-(N,N-dimethylamino)pyridine (DMAP) as a catalyst, which provides a convenient method for the functionalization of polyoxometalates.
Yue Zhang et al.
Pharmaceutical research, 29(6), 1627-1636 (2012-01-26)
Delivery of siRNA into cells remains a critical challenge. Our lab has shown a novel polyamidoamine (PAMAM) dendrimer with modified pentaerythritol derivative core (PD dendrimer) to exhibit high plasmid DNA transfection efficiency and low cytotoxicity. Here, we evaluate PD dendrimer
Chul-Bae Kim et al.
Journal of combinatorial chemistry, 9(6), 1157-1163 (2007-09-29)
Application of a novel sulfonate-based traceless multifunctional linker system using pentaerythritol as a tetrapodal soluble support was demonstrated using liquid-phase parallel and combinatorial preparation of biphenyl and terphenyl compounds. Nickel-catalyzed reactions of pentaerythritol tetrakis(arenesulfonate)s with arylmagnesium bromides generated the desired
Lixin Yang et al.
Biomacromolecules, 12(6), 2032-2038 (2011-04-15)
A series of biodegradable polyurethanes containing free side hydroxyl groups (PUOH) were synthesized successfully in two steps: (1) PLA diol as soft segment, hexamethylene diisocyanate (HDI) as hard segment, and benzalpentaerythritol (BPO) as a chain extender were used to synthesize
Guowei Wang et al.
Macromolecular rapid communications, 32(20), 1658-1663 (2011-08-23)
The eight-shaped poly(ethylene oxide) (PEO) is synthesized by a combination of Glaser coupling with ring-opening polymerization (ROP). Firstly, the star-shaped (PEO-OH)(4) is synthesized by ROP of ethylene oxide (EO) using pentaerythritol as an initiator and diphenylmethyl potassium (DPMK) as a
Koichiro Uto et al.
Journal of controlled release : official journal of the Controlled Release Society, 110(2), 408-413 (2005-12-08)
The objective of this study is to develop a sensitive temperature-responsive material that would function near body temperature. To achieve this purpose, we compounded 2-branched and 4-branched poly(epsilon-caprolactone) macromonomers to modulate the transition temperatures of the resulting cross-linked materials. The
Samar Hamdy et al.
Journal of pharmaceutical and biomedical analysis, 44(4), 914-923 (2007-06-26)
The present study had two main objectives. First, was to compare the immune stimulatory effect of two synthetic lipid A analogues (7-acyl lipid A and pentaerythritol-based lipid A (PET lipid A)) on maturation/stimulation of bone marrow derived dendritic cells (DCs).
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