Materials Literature
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Kinases play a key role in many cellular processes by catalyzing the transfer of phosphoryl groups from ATP to a broad number of substrates, including amino acids on target proteins. The reagent 5'-fluorosulfonylbenzoyl-5'-adenosine (FSBA) has been widely used to identify ATP-binding sites in kinases since it reacts w…
Abstract For assessing the rock applicability of accelerated tests for alkali-aggregate reactivity and the effect of aggregate particle size on determining alkali reactivity of concrete aggregates in accelerated tests, experimental studies on microstructure and expansion behaviors of Potsdam sandstone and a Norwegian…
Using Monte Carlo simulations, we study the diffusion-controlled dynamics of a polymer chain, which leads to the intrachain reaction of two reactive monomers. On the basis of the bond fluctuation lattice model, we computed the mean first-passage time and examined its scaling behavior as a function of the chain length…
Measurements are reported for the sorption equilibrium and transport of water vapor into polyaniline (PANI) powders and asymmetric, microporous hollow fibers. Equilibrium isotherms at 298 K were measured on powders doped with 13 different organic and inorganic acids to change the polyaniline from its emeraldine base,…
Abstract The determination of a crystal structure consists of several steps of which refinement comes towards the end. After crystal growth, data collection, data reduction, absorption correction, and solution of the phase problem, the crystallographer has obtained atomic coordinates for some or all non-hydrogen atoms…
Chromium has been substituted for ruthenium in $\mathrm{Ca}\mathrm{Ru}{\mathrm{O}}_{3}$ up to 35%. It is found that chromium induces a ferromagnetic contribution showing a maximum fraction for $x=0.15$ in $\mathrm{Ca}{\mathrm{Ru}}_{0.85}{\mathrm{Cr}}_{0.15}{\mathrm{O}}_{3}$ with a Curie temperature $({T}_{\mathrm{C}})…
The adjustable solvent properties, vanishingly low surface tensions, and environmentally green characteristics of supercritical carbon dioxide present certain advantages in nanoparticles synthesis and processing. Unfortunately, most current techniques employed to synthesize and disperse nanoparticles in carbon dioxide…
In this chapter we present two possible ways to prepare nanosized cellulose whiskers from microcrystalline cellulose (MCC) derived from Norwegian spruce (Picea abies). The first procedure was to prepare a stable water suspension of cellulose whiskers after treatment with sulfuric acid (H 2 S0 4 ). In the second proced…
Regulating the activity of the histidine autokinase CheA is a central step in bacterial chemotaxis. The CheA autophosphorylation reaction minimally involves two CheA domains, denoted P1 and P4. The kinase domain (P4) binds adenosine triphosphate (ATP) and orients the gamma phosphate for phosphotransfer to a reactive h…
This chapter will introduce the reader to the topic of nanocomposites based on cellulose and also give a short description of the content of this book. This is a relatively new research field and there is no other book available on this topic. There is a growing interest on cellulose nanocomposites in developed and de…
A dodecaholmium wheel of [Ho12(L)6(mal)4(AcO)4(H2O)14] (1; mal = malonate) was synthesized by using p-tert-butylsulfonylcalix[4]arene (H4L) as a cluster-forming ligand. The wheel consists of three fragments of mononuclear A3- ([Ho(L)(mal)(H2O)]3-), trinuclear B3- ([Ho(H2O)2(mal)(Ho(L)(AcO))2]3-), and C3+ ([Ho(H2O)2]3+…
A novel cyclic trimer and tetramer of protected beta-glycamino acids were synthesized and investigated on conformation and assembly formation. A characteristic point of these cyclic beta-glycamino acids is their better solubility than other cyclic beta-amino acids due to the pyranose rings. Thus, the assembling proces…
A molecular-statistical theory for the entire sequence of the chiral tilted smectic phases is derived. Uniaxial and biaxial subphases were found to be stable in different temperature ranges depending on the molecular parameters. The model of a chiral molecule possessing a strong transverse terminal dipole moment and a…
Many properties of a composite material depend on the nature of the interface between the different components. To study the effect of filler surface chemistry, composites of cellulose acetate butyrate and both native and surface-trimethylsilylated cellulose nanocrystals from bacterial cellulose were investigated by d…
This chapter will give an idea of how the addition of microcrystalline cellulose (MCC) will affect the transparency, mechanical, thermal and barrier properties of biopolymers. It will also provide information on the production and structure of these nanocomposites. Two biopolymer matrices were used in this study, poly…
Abstract Macroscopic vanadium oxide fibers have been fabricated by an extrusion process. By varying the shear rate associated with the gel extrusion process we have been able to tune the diameter and transversal geometry of the fibers at macroscopic length scales. At the mesoscopic length scale, small‐angle X‐ray scat…
Pressure-induced superconducting behavior was found in two anion radical salts, EtMe3Z[Pd(dmit)2]2 (dmit = 1,3-dithiole-2-thione-4,5-dithiolate, Z = P, As), that are Mott insulators and exhibit different magnetic and structural transitions at ambient pressure.
Abstract Third‐order nonlinear and linear optical properties ofnickel(II) and copper(II) complexes with salen ligands, functionalised with electron donor/acceptor groups (DA‐salen), have been investigated in solution by the Z‐scan technique using an Nd:YAG laser ( λ inc = 1064 nm) and UV/Vis spectroscopy. The [M(DA‐ s…
We present a simple “top-down/bottom-up” strategy to fabricate nano- and micropatterned polymer brush arrays composed of pH- and salt-sensitive, weak polyelectrolyte copolymers [poly( N -isopropylacrylamide- co -methacrylic acid, 3:1, poly(NIPAAM- co -MAA)]. In our approach, a silicon surface is first patterned with g…
Abstract Using molecular dynamics simulations with an analytical embedded‐atom method (MAEAM) model, the diffusion behavior of helium atoms at two Σ = 5 symmetric grain boundaries of Ni was investigated in the present paper. The simulations demonstrate that the interstitial helium atoms are stable at the grain boundar…