Reinforcing a Thermoplastic Starch/Poly(butylene adipate-co-terephthalate) Composite Foam with Polyethylene Glycol under Supercritical Carbon Dioxide.

Biodegradable foams are a potential substitute for most fossil-fuel-derived polymer foams currently used in the cushion furniture-making industry. Thermoplastic starch (TPS) and poly(butylene adipate-co-terephthalate) (PBAT) are biodegradable polymers, although their poor compatibility does not support the foam-forming process. In this study, we investigated the effect of polyethylene glycol (PEG) with or without silane A (SA) on the foam density, cell structure and tensile properties of TPS/PBAT blends.

The Processing and Electrical Properties of Isotactic Polypropylene/Copper Nanowire Composites.

Polypropylene (PP), a promising engineering thermoplastic, possesses the advantages of light weight, chemical resistance, and flexible processability, yet preserving insulative properties. For the rising demand for cost-effective electronic devices and system hardware protections, these applications require the proper conductive properties of PP, which can be easily modified. This study investigates the thermal and electrical properties of isotactic polypropylene/copper nanowires (i-PP/CuNWs).

Thermoplastic Starch with Poly(butylene adipate--terephthalate) Blends Foamed by Supercritical Carbon Dioxide.

Starch-based biodegradable foams with a high starch content are developed using industrial starch as the base material and supercritical CO as blowing or foaming agents. The superior cushioning properties of these foams can lead to competitiveness in the market. Despite this, a weak melting strength property of starch is not sufficient to hold the foaming agents within it.

Enhancement of T2* Weighted MRI Imaging Sensitivity of U87MG Glioblastoma Cells Using γ-Ray Irradiated Low Molecular Weight Hyaluronic Acid-Conjugated Iron Nanoparticles.

Introduction: It has been reported that low-molecular-weight hyaluronic acid (LMWHA) exhibits a potentially beneficial effect on cancer therapy through targeting of CD44 receptors on tumor cell surfaces. However, its applicability towards tumor detection is still unclear. In this regard, LMWHA-conjugated iron (FeO) nanoparticles (LMWHA-IONPs) were prepared in order to evaluate its application for enhancing the T2* weighted MRI imaging sensitivity for tumor detection.

Physical and Biological Evaluation of Low-Molecular-Weight Hyaluronic Acid/FeO Nanoparticle for Targeting MCF7 Breast Cancer Cells.

Low-molecular-weight hyaluronic acid (LMWHA) was integrated with superparamagnetic FeO nanoparticles (FeO NPs). The size distribution, zeta potential, viscosity, thermogravimetric and paramagnetic properties of the LMWHA-FeO NPs were systematically examined. For cellular experiments, MCF7 breast cancer cell line was carried out.

In Vivo Investigation into Effectiveness of Fe₃O₄/PLLA Nanofibers for Bone Tissue Engineering Applications.

Fe₃O₄ nanoparticles were loaded into poly-l-lactide (PLLA) with concentrations of 2% and 5%, respectively, using an electrospinning method. In vivo animal experiments were then performed to evaluate the potential of the Fe₃O₄/PLLA nanofibrous material for bone tissue engineering applications. Bony defects with a diameter of 4 mm were prepared in rabbit tibias.

In Vitro Biocompatibility, Radiopacity, and Physical Property Tests of Nano-Fe₃O₄ Incorporated Poly-l-lactide Bone Screws.

The aim of this study was to fabricate biodegradable poly-l-lactic acid (PLLA) bone screws containing iron oxide (Fe₃O₄) nanoparticles, which are radiopaque and 3D-printable. The PLLA composites were fabricated by loading 20%, 30%, and 40% Fe₃O₄ nanoparticles into the PLLA. The physical properties, including elastic modulus, thermal properties, and biocompatibility of the composites were tested.

Static magnetic field attenuates lipopolysaccharide-induced multiple organ failure: a histopathologic study in mice.

Purpose: Previous studies demonstrated that static magnetic fields (SMF) were effective in down-regulating the expression of lipopolysaccharide (LPS)-induced inflammatory cytokines. The aim of this study was to provide histological evidence of SMF attenuating LPS-induced multiple organ failure (MOF).

Materials And Methods: In this study, BALB/cByJNarl (5 weeks, weighing 20-25 g) mice were chosen as test subjects.

Synthesis and molecular structures of two [1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene]-dichloro-Zn(II) coordination polymers.

Two novel coordination polymers with 3D metal-organic frameworks (MOFs) have been synthesized by reacting 1,4-bis(3-pyridyl)-2,3-diazo-1,3-butadiene (L) with zinc dichloride. Both compounds have the same repeating unit consisting of a distorted tetrahedral Zn(II) center coordinated by two chlorides and two pyridyl nitrogen atoms of two bridging bismonodentate L ligands, however, different structural conformations have been found, one forming a helical chain and the other producing a square-wave chain. The intermolecular C-H.

Different supramolecular coordination polymers of [N,N'-di(pyrazin-2-yl)-pyridine-2,6-diamine]Ni(II) with anions and solvent molecules as a result of hydrogen bonding.

Ni(II) complexes of N,N'-di(pyrazin-2-yl)pyridine-2,6-diamine (H2dpzpda) with different anions were synthesized and their structures were determined by X-ray diffraction. Hydrogen bonds between the amino groups and anions assembled the mononuclear molecules into different architectures. The perchlorate complex had a 1-D chain structure, whereas switching the anion from perchlorate to nitrate resulted in a corresponding change of the supramolecular structure from 1-D to 3-D.

Hydrogen-bonded supramolecule of N,N'-bis(4-pyridylmethyl)oxalamide and a zigzag chain structure of catena-poly[[[dichloridocobalt(II)]-mu-N,N'-bis(4-pyridylmethyl)oxalamide-kappa2N4:N4'] hemihydrate].

N,N'-Bis(4-pyridylmethyl)oxalamide, C(14)H(14)N(4)O(2), exists as a dimer which is extended into a two-dimensional network with other dimers through pyridine-amide hydrogen bonds. The crystal structure of the title coordination polymer, {[CoCl2(C(14)H(14)N(4)O(2))].0.