Application of cellulose to chromatographic media: Cellulose dissolution, and media fabrication and derivatization

As the cornerstone of chromatographic technology, the development of high-performance chromatographic media is a crucial means to enhance the purification efficiency of biological macromolecules. Cellulose is a popular biological separation medium due to its abundant hydroxyl group on the surface, easy modification and, weak non-specific adsorption. In this paper, the development of cellulosic solvent systems, typical preparation methods of cellulosic chromatographic media, and the enhancement of chromatographic properties of cellulosic chromatographic media by polymeric ligand grafting strategies and their mechanism of action are reviewed. Ultimately, based on the current research status, a promising outlook for the preparation of high-performance cellulose-based chromatographic media was presented.

Coupled nickel-cobalt nanoparticles/N,P,S-co-doped carbon hybrid nanocages with high performance for catalysis and protein adsorption

Carbon-supported bimetallic NiCo nanoparticles (NPs) have emerged as attractive catalysts and adsorbents for the reduction of 4-nitrophenol (4-NP) and separation of histidine-rich (His-rich) protein recently due to their low cost, high catalytic activity and good affinity for His-rich protein. In this study, new strongly coupled nickel-cobalt alloy/N,P,S co-doped carbon (NPSC) nanocages are rationally designed via chemical etching of the ZIF-67 dodecahedron with Ni²⁺ under sonication at room temperature, followed by poly(cyclotriphosphazene-co-4,4'-sulfonyldiphenol) (PZS) coating and subsequent carbonization treatment in a nitrogen atmosphere. When evaluated as a catalyst for 4-NP or an adsorbent for His-rich protein, the as-prepared NiCo@NPSC nanocages obtained at 700 °C show better performance than those obtained at other temperatures (500 and 900 °C). This improved catalytic effect is attributed to the controllable size and fine distribution of the NiCo NPs together with the effective contact between the catalysts and the N,P,S co-doped carbon matrix, leading to a superior catalytic effect on the reduction of 4-NP and the adsorption of His-rich protein. This catalyst design principle can be easily extended to other catalysis research fields.

A facile synthesis of hybrid silicon quantum dots and fluorescent detection of bovine hemoglobin

A new type of hybrid SiQDs was synthesized with a higher nitrogen content, fluorescence intensity and longer fluorescence lifetime.

Facile synthesis of thiazole-functionalized magnetic microspheres for highly specific separation of heme proteins

Thiazole-functionalized magnetic microspheres which exhibited high selectivity to capture hemoglobin with a binding capacity of 2.02 g g⁻¹ were successfully synthesized.

Fabrication of imidazolium-functionalized magnetic composite microspheres for selective recognition and separation of heme proteins

Imidazolium-functionalized magnetic composite microspheres were successfully synthesized, which exhibited high hemoglobin binding capacity (6321 mg g⁻¹) and excellent selectivity.

Preparation of novel anionic polymeric ionic liquid materials and their potential application to protein adsorption

A series of novel anionic polymeric ionic liquid materials were prepared and used to adsorb bovine hemoglobin from bovine blood.

A three-dimensional nickel-doped reduced graphene oxide composite for selective separation of hemoglobin with a high adsorption capacity

A 3D nickel-doped reduced graphene oxide aerogel was prepared by one-step reduction and self-assembly, which exhibited favorable selectivity and high adsorption capacity for isolating hemoglobin.

Electrochemically-responsive magnetic nanoparticles for reversible protein adsorption

Electrochemically-responsive magnetic hybrid nanoparticles are designed and prepared to achieve electrochemically-controlled reversible separation of proteins.

Amino acid-based ionic liquid surface modification of magnetic nanoparticles for the magnetic solid-phase extraction of heme proteins

Amino acid-based ionic liquid functionalized magnetic nanoparticles were fabricated as an MSPE adsorbent for hemoglobin with a binding capacity of 1.58 g g⁻¹.

Acidic ionic liquid modified silica gel for adsorption and separation of bovine serum albumin (BSA)

In this work, silica gel (SiO₂) was modified with an acidic ionic liquid (Im⁺·HSO₄⁻) and the product was characterized using infrared spectroscopy, thermogravimetric analysis and elemental measurement.

Ionic liquid poly(3-n-dodecyl-1-vinylimidazolium) bromide as an adsorbent for the sorption of hemoglobin

A novel polymeric ionic liquid, poly(1-vinylimidazolium-3-n-dodecyl) bromide, exhibits selective adsorption of hemoglobin from human whole blood.

Polymer decorated magnetite materials as smart protein separators to manipulate the high loading of heme proteins

Polymer decorated magnetite materials using polyvinyl imidazole were successfully fabricated, which could separate high-abundance heme proteins from blood efficiently.

Preparation of magnetic metal–organic framework nanocomposites for highly specific separation of histidine-rich proteins

This work reports a novel metal–organic framework (MOF)-based metal affinity platform for the rapid and highly specific separation of histidine-rich proteins using zeolitic imidazolate framework-8 coated magnetic nanocomposites (denoted as Fe₃O₄@ZIF-8).

One-pot synthesis of CuFe2O4 magnetic nanocrystal clusters for highly specific separation of histidine-rich proteins

This work reports a facile ligand-free method for the rapid and highly specific separation of histidine (His)-rich proteins using CuFe₂O₄ magnetic nanocrystal clusters (MNCs). Monodispersed CuFe₂O₄ MNCs were synthesized via a simple and economical one-pot hydrothermal process. The resulting MNCs were characterized in detail. The measurements indicated that the MNCs exhibited good dispersion, high crystallinity, and superparamagnetic properties. Moreover, the obtained MNCs had a high saturation magnetization (45.1 emu g^-1), which was sufficient to accomplish fast and efficient separation with an external magnetic field. The selectivity and binding capacity of CuFe₂O₄ MNCs were evaluated using a His-rich protein (bovine haemoglobin) and other proteins (bovine serum albumin, human serum albumin, myoglobin, lysozyme, cytochrome c and horseradish peroxidase) containing fewer surface-exposed His residues as model samples. The most distinct feature of the CuFe₂O₄ MNCs is the high haemoglobin binding capacity (4475 mg g^-1) due to the coordination between copper(ii) ions and surface-exposed histidine resides of haemoglobin. In addition, the CuFe₂O₄ MNCs can be successfully employed to selectively bind and remove abundant haemoglobin from human blood samples. The good results demonstrate the potential of CuFe₂O₄ MNCs in the separation of His-rich proteins.

Facile synthesis of ionic liquid functionalized silica-capped CdTe quantum dots for selective recognition and detection of hemoproteins

Novel ionic liquid functionalized silica-capped CdTe quantum dots were fabricated and used for the selective recognition and detection of hemoproteins.

Rapid and direct MALDI-MS identification of pathogenic bacteria from blood using ionic liquid-modified magnetic nanoparticles (Fe3O4@SiO2)

A novel method for pathogenic bacteria identification directly from blood samples using cationic ionic liquid-modified magnetic nanoparticles (CILMS) is reported.

Ferroferric oxide/l-cysteine magnetic nanospheres for capturing histidine-tagged proteins

Ferroferric oxide/l-cysteine (Fe₃O₄/Cys) nanospheres (NSs) have been successfully synthesized via a facile solvothermal route. Fe₃O₄/Cys NSs possessed high thiol group density and saturation magnetization (M_s) of 84.6 emu g^-1. The prepared magnetic NSs are biocompatible and manipulatable by an external magnetic force. After chelating Ni²⁺ ions, Fe₃O₄/Cys-Ni²⁺ NSs were used to enrich and purify histidine-tagged (His-tagged) proteins directly from the mixture of lysed cells without pretreatment. It has been found that Fe₃O₄/Cys-Ni²⁺ NSs present negligible nonspecific protein adsorption and high protein binding activity with the saturation capacity being 53.2 μg mg^-1 and they are especially suitable for rapid purification of His-tagged proteins.