Materials Literature
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Microscope slides containing material from Sierra Leone used by Woodhead and Tweed to describe eight new Surirellaceae taxa in the mid-twentieth century were reinvestigated. Only two taxa were found on the original slides, Surirella approximata Woodhead & Tweed and S. engleri [var. constricta] f. minor Woodhead & Twee…
Synthetic polymers are considered to be the promising materials for biomedical applications. Various polymer formulations have been employed to achieve the desired chemical, physical and biological properties. Recently, there has been much interest in the development of environmentally responsive polymers for use as b…
To identify the origin of the $XY$ spin dimensionality in the bilayered system ${$Cu${}_{4}$(tetrenH${}_{5}$)[W(CN)${}_{8}$]${}_{4}\ifmmode\cdot\else\textperiodcentered\fi{}$7.2H${}_{2}$O${}}_{n}$ (WCuT) we use a combination of single-crystal experiments (bulk magnetization, neutron flipping ratio, electron magnetic r…
A new field emission model of carbon nanotubes (CNTs) to simulate gas detection mechanism in CNT based ionization gas sensor has been developed. The new model consists of three modules which are combined together and embedded in the standard particle-in-cell/Monte Carlo collision codes. The functionality of the enhanc…
Ein klarer Beweis für die Vorteile der Verwendung Cytosin-reicher DNA-Stränge zur Stabilisierung fluoreszierender Ag-Nanocluster wurde erbracht. Die berechneten Fluoreszenzspektren von mit DNA-Monomeren (dC, dA, dT und dG) geschützten Silber-Nanoclustern (AgNCs) stimmten gut mit den experimentellen Spektren überein (s…
We investigated the pressure effect of three inert gases (nitrogen, helium, and argon) on the phase behavior of polystyrene- block -poly( n -pentyl methacrylate) copolymer (PS- b -PnPMA) showing closed-loop phase behavior and baroplasticity. Helium gas pressure enhanced the miscibility between PS and PnPMA blocks simi…
Four new 1D spin-Peierls-type compounds, [D(5)]1-(4'-R-benzyl)pyridinium bis(maleonitriledithiolato)nickelate ([D(5)]R-Py; R=F, I, CH(3), and NO(2)), were synthesized and characterized structurally and magnetically. These 1D compounds are isostructural with the corresponding non-deuterated compounds, 1-(4'-R-benzyl)py…
Nanoporöse Materialien: Geordnete poröse Co3O4-Schichten mit hohem Aspektverhältnis wurden durch Anodisieren eines Cobaltsubstrats und anschließendes Glühen erhalten. Entscheidend für die Schichtbildung ist, dass die konkurrierende Sauerstoffentwicklung beim Anodisieren ausreichend verhindert wird. Die aus Co3O4-Kanäl…
<div class="section abstract"><div class="htmlview paragraph">The emission regulations for mobile applications become stricter in Euro-IV to Euro-VI levels. Carbon monoxide and hydrocarbon can be removed by efficient Diesel Oxidation Catalysts (DOC) but Particulate Matter (PM) and NOx are more demanding re…
By means of first-principles calculations based on density functional theory (DFT) and hybrid functional, we studied the structural, electronic, and ferroelectric properties of the two recently synthesized high-pressure perovskite-type (orthorhombic, space group Pnma) and LiNbO(3)-type (rhombohedral, space group R3c)…
We report the effect of magnetic field (H) and hydrostatic pressure (P) on the order of magnetic transition of polycrystalline La0.4Bi0.3Sr0.3MnO3 which undergoes a first-order paramagnetic (PM) to ferromagnetic (FM) transition in La0.7−xBixSr0.3MnO3 series. The ferromagnetic Curie temperature (TC) increases with incr…
The nucleation effects of branched poly(lactic acid), having the castor oil core, on the crystallization behavior of the bacterial polyester, poly (3-hydroxybutyrate- co -3-hydroxyvalerate) (PHBV), were investigated in this study by using differential scanning calorimetry (DSC) and polarized optical microscopy (POM).…
Experimental procedures have been developed to obtain the mechanical stiffness and strength properties of an orthotropic polyurethane-coated nylon fabric for use in a finite element analysis of an inflatable, deployable structure. A method that utilizes a specialized material test fixture and photogrammetry to collect…
Abstract Two phase separating block copolymers with photolabile protected amino groups in one block have been synthesized through RAFT polymerization followed by efficient click modification. Techniques like NMR, GPC, and DSC were applied for the characterization of these functional materials. The block copolymers wer…
Lower carat gold alloys, specifically 9 carat gold alloys, containing less than 40 % gold, and alloying additions of silver, copper and zinc, are commonly used in many jewellery applications, to offset high costs and poor mechanical properties associated with pure gold. While gold is considered to be chemically inert,…
Abstract Thermopower (TP), S of pure graphene in the Bloch–Grüneisen (BG) regime is investigated assuming electrons to be scattered by in‐plane acoustic phonons and taking into account the temperature dependent effects arising from thermal averaging over carrier energy. Numerical calculations of electron mobility and…
In this study, two different scale projectile high velocity penetration experiments with concrete targets that had an average compressive strength of 35 MPa were conducted in order to find the velocity limits and nose erosion properties. We conducted the penetration experiments for the small-scale (48 mm diameter, 195…
Recent developments in the areas of biomaterials devices have resulted in a number of advances in the searches of natural substances which may inhibit the dental plaque formation and/or the hydroxyapatite demineralization In particular, this research is focused on novel macromolecules and biocompatible materials for u…
We investigated the design, optimization, and evaluation method of an infrared (IR)/microwave (MW) multilayered dielectric plate type of beam combiner. The MW multilayered dielectrics design theory and IR film design theory were unified using transmission line theory. The principles in designing the initial structure…
Magnesium fluoride (MgF2) films deposited by resistive heating evaporation with oblique-angle deposition have been investigated in details. The optical and micro-structural properties of single-layer MgF2 films were characterized by UV-VIS and FTIR spectrophotometers, scanning electron microscope (SEM), atomic force m…