Abstract:
:It is demonstrated that the molecular solubility of softwood hemicelluloses is significantly influenced by pretreatment of the fibers, extraction, and downstream processing. To quantify these effects, four hemicellulose samples were extracted from different thermomechanical pulps of Norway spruce. The molecular solubility of the samples was characterized by size and molar mass distributions, and the morphology of the molecules was studied using high resolution microscopy techniques. All extracted samples were well dispersed in aqueous media creating transparent dispersions, but dynamic light scattering measurements showed that molecular solubility can only be achieved using specific pretreatments and extractions. The procedure yields acetylated galactoglucomannan (AcGGM)-rich hemicelluloses with an average molar mass of 21-35 kDa and a diameter up to 10 nm but also shows that water is a poor solvent for this sample since an association is detected as soon as the concentration is about 20 g/L. These associated hemicellulose dispersions are still absolutely clear on visual inspection, underlining the need for careful measurement when assessing the solubility of wood hemicelluloses.
journal_name
Biomacromoleculesjournal_title
Biomacromoleculesauthors
Kishani S,Vilaplana F,Xu W,Xu C,Wågberg Ldoi
10.1021/acs.biomac.8b00088subject
Has Abstractpub_date
2018-04-09 00:00:00pages
1245-1255issue
4eissn
1525-7797issn
1526-4602journal_volume
19pub_type
杂志文章abstract::The time-dependent diffusion and mechanical properties of gelatin in solution, in the gel state, and during the sol/gel transition were determined using fluorescence recovery after photobleaching (FRAP) and rheology. The parameters in the experimental design were 2% w/w and 5% w/w gelatin concentration; 15, 20, and 25...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm1008487
更新日期:2010-12-13 00:00:00
abstract::As a programmable biopolymer, DNA has shown great potential in the fabrication and construction of nanometer-scale assemblies and devices. In this report, we described a strategy for efficient manipulation of gold nanoparticle-bound DNA using restriction endonuclease. The digestion efficiency of this restriction enzym...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm060517o
更新日期:2006-11-01 00:00:00
abstract::The development of large-scale suspension cell cultures using microcarriers has long been a focus of attention in the fields of pharmacy and biotechnology. Previously, we developed cell-detachable microcarriers based on temperature-responsive poly(N-isopropylacrylamide) (PIPAAm)-grafted beads, on which adhering cells ...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm300256e
更新日期:2012-06-11 00:00:00
abstract::Hydrogel scaffolds are used in biomedicine to study cell differentiation and tissue evolution, where it is critical to control the delivery of chemical cues both spatially and temporally. While large molecules can be physically entrapped in a hydrogel, moderate molecular weight therapeutics must be tethered to the hyd...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm400169d
更新日期:2013-04-08 00:00:00
abstract::Microgels based on poly(vinyl alcohol), PVA, grafted with methacrylate side chains, MA, incorporating N-isopropylacrylamide, NiPAAm, monomer, were prepared by water-in-water emulsion polymerization method. These systems exhibit a spherical shape and a volume-phase transition, that is, shrinking, below physiological te...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm900185u
更新日期:2009-06-08 00:00:00
abstract::Nowadays the open and the patent literatures propose a large number of polymers whose main chains can be degraded usefully. Among these degradable polymers, aliphatic polyester-based polymeric structures are receiving special attention because they are all more or less sensitive to hydrolytic degradation, a feature of...
journal_title:Biomacromolecules
pub_type: 杂志文章,评审
doi:10.1021/bm0494702
更新日期:2005-03-01 00:00:00
abstract::Smart nanocarriers for the transport of drugs to tumor cells are nowadays of great interest for treating cancer. The use of enzymatic stimuli to cleave peptide-based drug nanocapsules for the selective release of nanocapsule cargo in close proximity to tumor cells opens new possibilities in cancer research. In the pre...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/acs.biomac.0c00240
更新日期:2020-04-13 00:00:00
abstract::Reversible stereoselective complexes were spontaneously obtained from mixing acetonitrile solutions of enatiomeric d-poly(lactic acid) (d-PLA), l-poly(lactic acid) (l-PLA), and leuprolide, a l-configured nonapeptide LHRH analogue. The complex spontaneously aggregated and precipitated in high yields (>90%) from acetoni...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm0300249
更新日期:2003-09-01 00:00:00
abstract::Binding human serum albumin (HSA) of three polyoxometalates (POMs) with the Wells-Dawson structure, alpha(2)-[P2W17O61]10- (abbreviated as alpha(2)-P2W17) and two of its metal-substituted derivatives, alpha(2)-[NiP2W17O61]8- and alpha(2)-[CuP2W17O61]8- (alpha(2)-P2W17Ni and alpha(2)-P2W17Cu, respectively) was studied ...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm701120j
更新日期:2008-03-01 00:00:00
abstract::Detailed structural characterization of protein-polymer conjugates and understanding of the interactions between covalently attached polymers and biomolecules will build a foundation to design and synthesize hybrid biomaterials. Conjugates based on simple protein structures are ideal model system to achieve these ends...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm300561y
更新日期:2012-06-11 00:00:00
abstract::Silicatein α exists within the protein filament of silica spicules of the marine sponge Tethya aurantium in a predominantly β-sheet structure. However, it is produced in a soluble form with mixed α-helix/β-sheet structure akin to its cathepsin L homologue. To understand this conformational transition in the context of...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm100932e
更新日期:2010-11-08 00:00:00
abstract::A new family of cationic dendron-bearing lipids (CDLs) with poly(amidoamine) dendrons of first to third generation (named as A1, A2, and A3, respectively) was synthesized through a synthesis approach that permits facile variation of chemical structures. All CDLs could effectively bind small interfering RNA (siRNA) to ...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm4011563
更新日期:2013-12-09 00:00:00
abstract::A well-defined fluorescent conjugated polyfluorene with pendant lactopyranosyl ligands was easily prepared through Cu(I)-catalyzed azide/alkyne "click" ligation and Suzuki coupling polymerization. As a fluorescent multivalent model system of glycoconjugates, the polymer was first used for studies of metal ion-mediated...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm901165n
更新日期:2010-01-11 00:00:00
abstract::In biomedicine, PEGylation is one of the most successful strategies to modify the physicochemical and biological properties of peptides, proteins, and other biomacromolecules. Because of the polydisperse nature of regular PEGs and limited PEGylation strategies, it is challenging to quantitatively fine-tune and accurat...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/acs.biomac.9b01425
更新日期:2020-02-10 00:00:00
abstract::A novel cellulose derivative, 6-O-dihydrophytylcellulose (DHPC), was first synthesized via a ring-opening polymerization and allowed to self-assemble onto an air-water interface. Langmuir-Blodgett (LB) films were characterized with atomic force microscope (AFM), UV-vis spectroscopy, and Fourier transform infrared spec...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm060083x
更新日期:2006-06-01 00:00:00
abstract::Single-molecule total internal reflection fluorescence microscopy was used to observe the dynamic behavior of polycytosine single-stranded DNA (ssDNA) (1-50 nucleotides long) at the interface between aqueous solution and hydrophilic (oligoethylene glycol-modified fused silica, OEG) and hydrophobic (octadecyltriethoxys...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm301289n
更新日期:2012-12-10 00:00:00
abstract::In this work, we have applied an electrospinning method to control wettability and further hydrophobic modification of a hydrophobic polymer mat of poly(vinylidene fluoride-co-hexafluoropropylene). A correlation between the processing parameters, rheological properties of polymer solutions, and electrospinning ability...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm400938n
更新日期:2013-11-11 00:00:00
abstract::Macromolecular dynamics in biological systems, which play a crucial role for biomolecular function and activity at ambient temperature, depend strongly on moisture content. Yet, a generally accepted quantitative model of hydration-dependent phenomena based on local relaxation and diffusive dynamics of both polymer and...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/acs.biomac.8b00191
更新日期:2018-07-09 00:00:00
abstract::The order of assembly of a magnetic nanoparticle (MNP) vector comprised of the same components (MNP, PEI, and plasmid DNA) on entry mechanism, intracellular localization, and viability of BHK21 cells was investigated. Cellular uptake measurements under four different uptake inhibiting conditions, such as low temperatu...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm100748p
更新日期:2010-09-13 00:00:00
abstract::Glycopolymer-polypeptide triblock copolymers of the structure, poly(l-alanine)-b-poly(2-acryloyloxyethyl-lactoside)-b-poly(l-alanine) (AGA), have been synthesized by sequential atom transfer radical polymerization (ATRP) and ring-opening polymerization (ROP). Controlled free radical polymerization of 2-O-acryloyl-oxye...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm0343500
更新日期:2004-01-01 00:00:00
abstract::A revised crystal structure for mercerized cellulose based on high-resolution synchrotron X-ray data collected from ramie fibers is reported (space group P2(1), a = 8.10(3) A, b = 9.03(3) A, c = 10.31(5) A, gamma = 117.10(5) degrees; 751 reflections in 304 composite spots; theta < 21.11 degrees; lambda = 0.7208 A; LAL...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm005612q
更新日期:2001-07-01 00:00:00
abstract::C13-dipeptides that did not gel on their own were found to form hydrogels when combined with mixtures (coassembly). At pH = 4.6, by mixing negatively charged C13-WD (C13-WD2- and/or C13-WD-) with C13-KW or C13-YK, where the side chain of K carried positive charge, two composite hydrogels with different mechanical prop...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/acs.biomac.0c01325
更新日期:2020-12-14 00:00:00
abstract::Two organosolv lignins from different origins, namely, almond shells and maritime pine, were modified by using a nanoclay and nanosilicate. Prior to modification, they were activated via glyoxalation to enhance the reactivity of the lignins and thus ease the introduction of the nanoparticles into their structure. The ...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/acs.biomac.9b00799
更新日期:2019-09-09 00:00:00
abstract::Polystyrene-polyisocyanopeptide (PS-PIAT) polymersomes containing CALB in two different locations, one in the aqueous inner compartment and one in the bilayer, were investigated for enzymatic ring-opening polymerization of lactones in water. It is shown that the monomers 8-octanolactone and dodecalactone yield oligome...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm7005938
更新日期:2007-12-01 00:00:00
abstract::Low molecular weight random copolymers bearing protonated primary amine groups and hydrophobic alkyl groups in the side chains were synthesized and their activities against E. coli , S. aureus , human red blood cells, and human epithelial carcinoma cells (HEp-2) were quantified. The mole fraction of alkyl side chains ...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm900784x
更新日期:2009-11-09 00:00:00
abstract::A layer-by-layer film composed of DNA and inorganic zirconium ion (Zr(4+)) was fabricated on the surface of gold thin film, and an electric field triggered disintegration of the multilayer film was studied by using electrochemical surface plasmon resonance (EC-SPR). EC-SPR results demonstrated that the film was disass...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm800766t
更新日期:2008-10-01 00:00:00
abstract::The use of polyelectrolyte surface-modified Cowpea mosaic virus (CPMV) for the templated synthesis of narrowly dispersed gold nanoparticles is described. The cationic polyelectrolyte, poly(allylamine) hydrochloride (PAH), is electrostatically bound to the external surface of the virus capsid; the polyelectrolyte promo...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm200499v
更新日期:2011-07-11 00:00:00
abstract::Experimental and theoretical investigations of the swelling and mechanical properties of hydrogels formed from chitosan, bovine serum albumin (BSA), and chitosan/BSA mixtures cross-linked with genipin were performed. The properties of cross-linked chitosan hydrogels were explained in terms of its polyelectrolyte behav...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm060133y
更新日期:2006-11-01 00:00:00
abstract::We investigate lysozyme-lysozyme and lysozyme-salt interactions in electrolyte solutions using a molecular-thermodynamic model. An equation of state based on the statistical mechanical perturbation theory is applied to describe the interactions. The perturbation term includes a new square-well potential of mean force,...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm0300406
更新日期:2003-11-01 00:00:00
abstract::A new synthetic route to beta-cyclodextrin-linked hyaluronic acid (HA-CD) was developed. This was based on the preparation of a HA derivative selectively modified with adipic dihydrazide (HA-ADH) and a beta-cyclodextrin derivative possessing an aldehyde function on the primary face, followed by their coupling by a red...
journal_title:Biomacromolecules
pub_type: 杂志文章
doi:10.1021/bm0507094
更新日期:2006-03-01 00:00:00