Materials Literature
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The aim of the present study was to synthesize and characterize a stabilized polymeric gene delivery carrier, a poly(ethylene glycol)-co-poly(ethylenimine) (PEG-PEI) co-polymer, using isophorone diisocyanate (IPDI) as the coupling reagent. IPDI containing two different active isocyanate functional groups could satisfy…
Zeolitic products formed by hydrothermal treatment of coal fly ash (FA) with KOH aqueous solution under various reaction conditions were examined. Only linde F-type zeolite (K2Al2Si2O8·3H2O) was newly formed at atmospheric pressure, except formation of a small amount of kalsilite (KAlSiO4) at longer reaction time. The…
The jamming transition in granular packings is characterized by a sudden change in the coordination number. In this work we investigate the evolution of coordination number as function of volume fraction for frictionless packings of spheres undergoing isotropic deformation. Using the results obtained from Discrete Ele…
We investigate the transport properties of oue dimensional silicon-carbon ［（SiC）n］ and alumium- nitrogen ［（Al-N）n］ nano-wires coupled to two Al（100） electrodes based on a recently developed ab-initio nonequilibrium Green function formalism.The equilibrium conductance of silicon-carbon and alumium-nitrogen nano-wires d…
DC high voltage photoemission electron guns with GaAs photocathodes have been used to produce polarized electron beams for nuclear physics experiments for about 3 decades with great success. In the late 1990s, Jefferson Lab adopted this gun technology for a free electron laser (FEL), but to assist with high bunch char…
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The subject of the present work is optimization of the modern implant system Osteoplant, which was created and is still developed by Foundation of University of Medical Sciences in Poznan. Clinical observations point to the occurrence of both early and late complications in the case of all two-component implant system…
The genetically amenable organism Drosophila melanogaster has been estimated to have 14,076 protein coding genes in the genome, according to the flybase release note R5.13 (http://flybase.bio.indiana.edu/static_pages/docs/release_notes.html). Recent application of RNA interference (RNAi) to the study of developmental…
The objective of this work was to syn- thesize zeolitic products using rice husk ash (RHA) as silicon source. For the synthesis, two mineralizing agents: NaOH and KOH were tested. Chemical com- position of the synthesized samples as well as their cation exchange capacity (CEC) were determined. The samples were also ch…
Environmentally degradable polymers are the focus of a great deal of research around the world, which began over half a century ago with the recognition that plastics, particularly in packaging, were becoming a problem with regards to disposal. Two major approaches to replacement plastics were taken to alleviate the p…
We develop a theoretical basis for understanding the spin relaxation processes in Kondo lattice systems with heavy fermions as experimentally observed by electron spin resonance (ESR). The Kondo effect leads to a common energy scale that regulates a logarithmic divergence of different spin kinetic coefficients and sup…
Current challenges and future perspectives of topological polymer chemistry have been reviewed. A variety of novel cyclic and multicyclic macromolecular topologies has now been realized by intriguing synthetic protocols. In particular, the electrostatic polymer self-assembly of telechelic precursors having cyclic ammo…
This work is part of a research project which has the aim to analyze the strength and fracture mechanical properties of hydrostatic coextruded aluminium/magnesium compounds. The paper presents the main results of the investigations concerning compound quality as well as loading tests with these compounds at temperatur…
The resistivity of chemical-vapor-deposited (CVD)-W film was reported to be significantly reduced using a -based atomic layer deposited (ALD)-W nucleation layer for continuously shrinking memory devices. But, we found that the adhesion performances of CVD-W films growing on the -based ALD-W nucleation layer were poor…
The research on very-high-cycle fatigue(VHCF) of metallic materials has become a new horizon in the field of metal research since 1980s.The behaviors of crack initiation and propagation, and the characteristics of S-N curve for metallic materials in the VHCF regime all differ from those in the low cycle and high cycle…
Three kinds of protein-metal complexes were developed as pH sensing devices in the aqueous solutions. Biological transferrin and lactoferrin proteins formed stable Tb3+ complexes, which exhibited long-lived and green luminescence signals. They showed pH-dependent luminescence changes around neutral pH, coupled with th…
A complete design of ducted propellers using the new computer systemThe computer system for the completed design of the ducted ship propellers has some common blocks and procedures with the analogical system for open propellers that has already been presented in detail in the Polish Maritime Research [1]. This article…
A sensing device comprising of a parabolic re∞ective surface and a bi-conical metal structure is proposed to focus terahertz energy on sample material in the sensing zone to create a strong interaction between terahertz signals and the sample under test. The signal enhancement by the sensing device is conflrmed by mod…
Abstract We propose a new energy density analysis (EDA) that evaluates atomic contributions of all energy terms, i.e., the kinetic, nuclear‐attraction, Coulomb, and Hartree–Fock (HF) exchange and density functional theory (DFT) exchange‐correlation energies using the Mulliken‐type partitioning. Although widely used DF…
We have systematically investigated structures and properties of inclusion crystals of bile acids and their derivatives. These steroidal compounds form diverse host frameworks having zero-, one- and two-dimensional cavities, causing various inclusion behaviors towards many organic compounds. The diverse host framework…