Materials Literature
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Recent dramatic progress in studying various two-dimensional (2D) atomic crystals and their heterostructures calls for better and more detailed understanding of their crystallography, reconstruction, stacking order, etc. For this, direct imaging and identification of each and every atom is essential. Transmission elec…
Significance We report on a novel atmosphere‐switching polymerization process (ASPP) that produces advanced polyolefin materials with high performance in a single polymerization reactor through unique monomer feeding policies. In the ASPP, each polymer particle is exposed to “atmosphere A” and “atmosphere B” in an alt…
Multiporphyrinic assemblies were quantitatively formed, in one step, from a gable-like zinc(II) bis-porphyrin ZnP2 and free-base porphyrins bearing pyridyl groups. The different fragments are held together by axial 4'-N(pyridyl)-Zn interactions. Formation of a macrocycle ZnP2 •(4'-cisDPyP) and a bis-macrocycle (ZnP2 )…
Abstract Conductometric titrations with triethylamine (Et3N) of mono-, di-, and trisulfonic acids have been performed in acetonitrile, and strong homoconjugation (homoassociation) for di- and trisulfonic acids have been revealed. The appearance of a maximum in the conductometric titration curve enables us to predict t…
Approximately 50% of cell wall peptidoglycan in Gram-negative bacteria is recycled with each generation. The primary substrates used for peptidoglycan biosynthesis and recycling in the cytoplasm are GlcNAc-MurNAc(anhydro)-tetrapeptide and its degradation product, the free tetrapeptide. This complex process involves ∼1…
Quality control of three-dimensional structures of macromolecules is a critical step to ensure the integrity of structural biology data, especially those produced by structural genomics centers. Whereas the Protein Data Bank (PDB) has proven to be a remarkable success overall, the inconsistent quality of structures re…
Abstract Transparent and superhydrophobic films of wax-gourd-like biomimetic Co3O4 microfibers were successfully fabricated on glass slides and ITO using a feasible and controllable hydrothermal method, which involved calcination at high temperature. It was demonstrated that the roughness of the as-prepared microfiber…
We present an effective method to suppress the hole overflow in Si quantum dots-based silicon nitride (SiN) light-emitting diodes (LEDs) by employing nanocrystalline Si (nc-Si) layer as hole blocking layer inserted between the SiN luminescent active layer and p-Si anode. The proposed devices exhibit strong white light…
Despite the fact that tissue engineered heart valves (TEHV) hold great promise for heart valve disease treatment, one of the challenges is to find suitable seeding cells. Bone marrow derived mesenchymal stem cells (MSCs) were considered to be one of the best seed cell sources. In this study we propose a novel approach…
The effect of protein and chemical chaperones and crowders on thermal stability and aggregation of apoform of rabbit muscle glycogen phosphorylase b (apoPhb) has been studied at 37°C. Proline suppressed heat-induced loss in ability of apoPhb to reconstitution at 37°C, whereas α-crystallin did not reveal a protective a…
Development of eco-friendly processes for nanosynthesis is gaining importance owing to the widespread application of nanoparticles (NPs). In the present study, we have explained the mechanism and kinetics of bioreduction in the biosynthesis of silver nanoparticles (AgNPs) using aqueous leaf extract of Rhizophora apicu…
BACKGROUND: Shape memory polymer (SMP) foams are being investigated as an alternative aneurysm treatment method to embolic coils. The goal of both techniques is the reduction of blood flow into the aneurysm and the subsequent formation of a stable thrombus, which prevents future aneurysm rupture. The purpose of this s…
Incorporation of drug-loaded nanoparticles (NPs) in colon-specific delivery systems shows potential for raising local drug concentrations, tumor targeting and improving chemotherapy. Alginate microcapsules (15-80 µm diameter) containing insoluble Eudragit(®) RS NPs as models were characterized precisely in terms of NP…
Trastuzumab (Herceptin(®) ) is a monoclonal antibody (mAb) for specific ablation of HER2-overexpressing malignant breast cancer cells. Intensification of antiproliferative activity of trastuzumab through construction of immunotoxins and nano-immunoconjugates is a promising approach for treatment of cancer. In this stu…
To understand the workings of the living cell, we need to characterize protein assemblies that constitute the cell (for example, the ribosome, 26S proteasome, and the nuclear pore complex). A reliable high-resolution structural characterization of these assemblies is frequently beyond the reach of current experimental…
The gadolinium-based contrast agent (GdBCA) Omniscan activates human macrophages through Toll-like receptor (TLR)-4 and TLR-7 signalling. To explore the mechanisms responsible we compared the ability of linear and macrocyclic GdBCA to induce a type I interferon signature and a proinflammatory/profibrotic phenotype in…
Metal (gold, silver, copper, platinum) quantum nano-clusters are an emerging family of fluorescent markers exhibiting unique photophysical properties with tunable electronic structure. This paper will give first an overview on the recent progress to produce stable and highly luminescent metal nanoclusters. In the seco…
Diffraction anisotropy is characterized by variation in diffraction quality with reciprocal lattice direction. In the example presented here, diffraction extended to 2.1 Å resolution along a* and c* directions but only to 3.0 Å along the b* direction. Severe anisotropy such as this is often associated with lack of det…
The last years have seen a major development in automation for protein production, crystallization, and X-ray diffraction data collection, which has contributed to accelerate the pace of structure solution and to facilitate the study of ever more challenging targets through macromolecular crystallography. This has led…
Modeling and analogy are commonly used to identify the part that a metal may play in the structure or function of a new protein which has been recognized by structural genomics. Mespeus ( http://mespeus.bch.ed.ac.uk/MESPEUS_10/) lists metal protein interactions whose geometry has been experimentally determined and all…