Expression of concern: Facile route to synthesize FeO@acacia-SOH nanocomposite as a heterogeneous magnetic system for catalytic applications.

Expression of concern for 'Facile route to synthesize FeO@acacia-SOH nanocomposite as a heterogeneous magnetic system for catalytic applications' by Reza Taheri-Ledari , , 2020, , 40055-40067, https://doi.org/10.1039/D0RA07986C.

FeO@Gum Arabic modified polyvinyl chloride membranes to improve antifouling performance and separation efficiency of organic pollutants.

Nanofiltration (NF) membranes are promising media for water and wastewater treatment; however, they suffer from their hydrophobic nature and low permeability. For this reason, the polyvinyl chloride (PVC) NF membrane was modified by iron (III) oxide@Gum Arabic (FeO@GA) nanocomposite. First, FeO@GA nanocomposite was synthesized by the co-precipitation approach and then its morphology, elemental composition, thermal stability, and functional groups were characterized by various analyses.

Recent advances on biomedical applications of pectin-containing biomaterials.

There is a growing demand for biomaterials developing with novel properties for biomedical applications hence, hydrogels with 3D crosslinked polymeric structures obtained from natural polymers have been deeply inspected in this field. Pectin a unique biopolymer found in the cell walls of fruits and vegetables is extensively used in the pharmaceutical, food, and textile industries due to its ability to form a thick gel-like solution. Considering biocompatibility, biodegradability, easy gelling capability, and facile manipulation of pectin-based biomaterials; they have been thoroughly investigated for various potential biomedical applications including drug delivery, wound healing, tissue engineering, creation of implantable devices, and skin-care products.

Facile route to synthesize FeO@acacia-SOH nanocomposite as a heterogeneous magnetic system for catalytic applications.

In this work, a novel catalytic system for facilitating the organic multicomponent synthesis of 9-phenyl hexahydroacridine pharmaceutical derivatives is reported. Concisely, this catalyst was constructed from acacia gum (gum arabic) as a natural polymeric base, iron oxide magnetic nanoparticles (FeO NPs), and sulfone functional groups on the surface as the main active catalytic sites. Herein, a convenient preparation method for this nanoscale composite is introduced.

Magnetic dextrin nanobiomaterial: An organic-inorganic hybrid catalyst for the synthesis of biologically active polyhydroquinoline derivatives by asymmetric Hantzsch reaction.

Dextrin is a low molecular weight polysaccharide obtained from natural resources. Due to exceptional properties such as chemical structure, having extreme reactive functional groups, low cost, commercial availability, non-toxicity and biocompatibility, it can be introduced as a green organocatalyst. The fabrication of hybrid materials from natural polymers and synthetic inorganic materials constructs compounds with new features, abilities and applications.

A brief survey on the advanced brain drug administration by nanoscale carriers: With a particular focus on AChE reactivators.

Obviously, delivery of the medications to the brain is more difficult than other tissues due to the existence of a strong obstacle, which is called blood-brain barrier (BBB). Because of the lipophilic nature of this barrier, it would be a complex (and in many cases impossible) process to cross the medications with hydrophilic behavior from BBB and deliver them to the brain. Thus, novel intricate drug-carriers in nano scales have been recently developed and suitably applied for this purpose.