Materials Literature
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The present study examines photoinduced electron transfer within self-assembled complexes between cytochrome c and either free base uroporphyrin (URO) or free base tetrakis(4-carboxyphenyl)porphyrin (4CP). In both systems, complexation of the porphyrin to the protein results in bathochromic shifts in the absorption ba…
Existing theory cannot account for the experimentally-observed thermal boundary resistance between deposited layers and substrates at room temperature. This is due to microstructural disorder in the deposited film within tens of nanometers of the interface. This work develops a model for the resulting thermal resistan…
As part of a program to create new low dimensional S=1/2 antiferromagnetic Heisenberg compounds with moderate exchange, we have prepared four new copper complexes with square magnetic lattices. The complexes L2[CuX4] have been prepared (L = 2-amino-5-methylpyridinium, X = Cl, Br; L = 2-amino-5-chloropyridinium, X = Br…
Other| October 01, 1997 Crystal structure refinement of aluminian lizardite-2H2 Maria Franca Brigatti; Maria Franca Brigatti Universita di Modena, Dipartimento di Scienze della Terra, Modena, Italy Search for other works by this author on: GSW Google Scholar Ermanno Galli; Ermanno Galli Search for other works by this…
Surface energy characteristics of a solid surface influence the extent and rate of protein adsorption. However, critical surface tension determined by contact angle measurements, cannot be used to predict the extent or rate of milk whey protein fouling onto a particular surface. Radioisotopic iodination of α-la and β-…
Abstract The synthesis of a photocrosslinkable polycation and its use in the assembly of alternating polyelectrolyte multilayers are described. Characterization by UV/VIS spectroscopy and time‐of‐flight secondary ion mass spectroscopy (ToF‐SIMS) reveals the influence of the crosslinking on the physical properties of t…
The photochemical reactions of nitrocobalt(III) tetraphenylporphyrin, (NO 2 )Co III TPP, and its six-coordinated complex with 4-(dimethylamino)pyridine, (NO 2 )Co III TPP(DMAPy), in benzene were studied by using a laser flash technique. The structures solved by X-ray analysis show that both compounds are the nitro for…
Impedance spectroscopy of cells indicates that both mass and charge‐transfer influence the electrode kinetics of the interfacial reactions. Charge‐transfer appears to dominate the electrode kinetics when the partial pressure of oxygen is sufficiently high, whereas mass transfer seems to be rate limiting at low oxygen…
Precision casting is an attractive method for the net shape production of parts, particularly interesting for expensive alloys like titanium. This paper investigates the possibilities to improve the properties of titanium castings, solely applying thermal treatments. It was shown that in the ({alpha} + {beta}) titaniu…
Reactions at a strongly segregated interface of a symmetric binary polymer blend are investigated via Monte Carlo simulations. End-functionalized homopolymers of different species interact at the interface instantaneously and irreversibly to form diblock copolymers. The simulations, in the framework of the bond fluctu…
Repetitive polypeptides of sequence [(AlaGly)3ProGluGly]16 3a, have been prepared in Escherichia coli as overexpressed recombinant proteins. Replacement of more than 90% of the naturally occurring proline (Pro) residues with 3,4-dehydroproline (Dhp) in sequence 3a was achieved by in vivo expression of the target prote…
Fourier transform Infrared (FTIR) analysis was applied to characterize the surface of atmospherically exposed metal plates. Early stages of atmospheric corrosion result in formation of corrosion films. Corrosion films are made up of layers of corrosion products initially caused from chemical reactions between the meta…
The dynamics of an 18-arm poly(isoprene) star polymer ${(M}_{n}^{\mathrm{arm}}$=7360 g/mol) is investigated by dynamic light scattering and viscometry. Above the overlap concentration ${c}^{*}$ the intensity autocorrelation functions show a two-step decay, which implies the existence of long range correlations, $\ensu…
A new material has been processed and characterized. It is a lightweight and high-damping composite formed by unidirectional Mg 2 Si fibres embedded in a pure magnesium matrix. This composite has been produced by unidirectional solidification of a Mg-Si near eutectic alloy (2 wt% Si). Mechanical strength was measured…
The effects of pressure (0.1−450 MPa) on enol−keto tautomerization reaction in salicylic acid (SA) have been investigated by steady-state absorption, fluorescence emission, and excitation spectroscopy. In dilute solutions, the emission intensity of the keto form of the monomer shows marked increase with pressure. In c…
Polarized Raman and infrared spectra of bis(thiourea)cadmium chloride, a novel semiorganic nonlinear optical crystal, were recorded to determine the symmetries of molecular vibrations. The observed Raman and infrared bands are assigned to molecular vibrations of thiourea, cadmium–sulphur and cadmium–chloride bonds. Th…
Fully cyclized, organo soluble, phenylethynyl-terminated, ether-imide oligomers of 2–10,000 g/mol (Mn) were prepared by the reaction of 2,2′-bis[4-(3,4-dicarboxyphenoxy)phenyl]-propane dianhydride (bisphenol-A dianhydride, BPADA) with a stoichiometric excess of either para, meta, or isomeric mixtures of phenylene diam…
The reduction of nitric oxide by propene in the presence of excessive oxygen over Pt/ZSM-5 has been investigated by in situ diffuse reflectance infrared Fourier transform spectrometry (DRIFTS) over a wide range of temperatures. It has been found that the main surface species formed during the reaction at low temperatu…
The systematic presence of a spectrum has been observed that has been termed anomalous SERS in the spectra on silver sols of a set of monocarboxylic acids, characterized by being independent of the adsorbate that is initially added and whose bands cannot be correlated with the respective Raman solution spectra. It has…
The cationic amphiphilic cobalt(II) phthalocyanines have been prepared, and are characterized by UV-absorption spectra in water and organic solvents and in their mixtures. The monomer–dimer transformation equilibrium was affected by solvent polarity and the length of the alkyl chains in the amphiphilic parts. All comp…