Materials Literature
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Procaryotic microorganisms accumulate several polymers in the form of intracellular inclusions as a strategy to increase survival in a changing environment. Such inclusions avoid osmotic pressure increases by tightly packaging certain macromolecules into the inclusion. In the present paper, a model describing changes…
Abstract Optically active trans-2-(arylthio or alkylthio)cyclohexanols are prepared by the asymmetric ring-opening of cyclohexene oxide with various arylthiols or alkylthiols in 52–85% ee by the use of zinc Lq-tartrate as a heterogeneous chiral Lewis acid catalyst.
Abstract In 15 Substances of general formula magnified image transition temperatures, transition enthalpies and entropies, densities and phase transition volumina, order parameters of a dissolved dye and optical refractive indices were measured. Additional miscibility and X‐ray investigations were performed. The resul…
ABSTRACT Differential scanning calorimetry was used to monitor the thermal denaturation kinetics of myofibrillar proteins in bovine muscle at pH 5.6. The activation energy, pre‐exponential factor, rate constant and mean life time for each transition were calculated by means of a dynamic method. The kinetic values and…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTC2Hn fragments on metal surfacesJerome Silvestre and Roald HoffmannCite this: Langmuir 1985, 1, 6, 621–647Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1 November 1985https://pubs.acs.org/doi/10.1021/la00066a001https…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTControl of the photochemical reactivity of coordination compounds by formation of supramolecular structures: the case of the hexacyanocobaltate(III) anion associated with polyammonium macrocyclic receptorsM. F. Manfrin, L. Moggi, V. Castelvetro, Vincenzo Balzani, M. W. Hosse…
Pulsed dye laser excitation spectroscopy of the 7F0----5D0 transition of Eu(III) reveals only a single peak as this ion is titrated into apocalmodulin. A titration based on the intensity of this transition shows that the first two Eu(III) ions bind quantitatively to two tight sites, followed by weaker binding (Kd = 2…
Abstract— Tetrasulfophthalocyanine and a series of its metal chelates were tested for their ability to photoinactivate V‐79 Chinese hamster cells. Incubation of cells for 1 h with tetrasulfophthalocyanine at 5 μ M effectively sensitized cells towards red light. At the 1% survival level, the dye was 4 x more efficient…
Previous theories describing the phase behavior of copolymer blends have ignored the sequence distribution of monomer unit.a in the copolymer. We introduce a parameter, 8, that describes the binary sequence distribution of the monomers in a copolymer chain. By varying 8, we can describe a block, random, or alternating…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and structure of the [(.eta.5-C5H5)Ti(Mo5O18)]3- and [(.eta.5-C5H5)Ti(W5O18)]3- anionsT. M. Che, V. W. Day, L. C. Francesconi, M. F. Fredrich, W. G. Klemperer, and W. ShumCite this: Inorg. Chem. 1985, 24, 24, 4055–4062Publication Date (Print):November 1, 1985Public…
Cracks in soda‐lime‐silica and vitreous silica glass close against a finite load at humidities between 0.01 % and 100%. The force associated with crack closure (0.15 J/m 2 ) can be predicted by a model which involves hydrogen‐bonded linkages of surface‐adsorbed water molecules. The fracture energy to reopen healed cra…
Binuclear phthalocyanines in which the two phthalocyanine nuclei are covalently linked through four-atom bridges, derived from catechol, have been prepared and characterized. Metal-free 2,9,16,23-tetra-(3,3-dimethylbutyl)phthalocyanine and 2,9,16,23-tetra-(2-trimethylsilylethyl)phthalocyanine were prepared as examples…
Preparation of amorphous silica doped with organic dye molecules, 1,4-dihydroxyanthraquinone, and the observation of the amorphous structure of this system by photochemical hole burning using the dye molecules as a spectral probe are reported. The various kinds of organic molecule-doped inorganic glassy materials are…
The ignition and burn times for lightweight (< 4oz/yd 2 ) all cellulosic, polyester/ cotton, and polyester/rayon fabrics held at 45° and in the vertical mode were measured and compared using modifications of the CS 191-53 test method. Sur face ignition times increased with increasing fabric weight but were essentia…
Time-differential perturbed-angular-correlation measurements and M\"ossbauer-effect measurements have been made on the Heusler alloy ${\mathrm{Ni}}_{2}$MnGa. The magnitude and sign of the magnetic field extrapolated to 0 K at $^{119}\mathrm{Sn}$ at the Ga site $^{111}\mathrm{Cd}$ at the Ni and Ga sites, and $^{99}\mat…
From domain investigations reported in the literature, it is concluded that the scanning electron microscope (SEM) technique, while revealing the main domain structure in a satisfactory way, gives little information about supplementary domains in the case of commercially coated sheets. It is demonstrated that even mor…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTElectronic structure of the triphosphorus, triarsenic, and triantimony units in a nortricyclane skeletonRolf Gleiter, Horst Koppel, P. Hofmann, H. R. Schmidt, and J. EllermannCite this: Inorg. Chem. 1985, 24, 24, 4020–4023Publication Date (Print):November 1, 1985Publication…
Varved clays deposited in proglacial Lake Ojibway at Matagami, Quebec, were derived from two source areas: carbonate-deficient, Precambrian crystalline igneous rocks from New Quebec to the east and carbonate-rich Palaeozoic rocks from the James Bay lowlands in Ontario to the west. About 50% of the 12–15 m thick clay s…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDirect proton transfer between hydrocyanic acid and nitrogen and oxygen basesRodney A. Bednar and William P. JencksCite this: J. Am. Chem. Soc. 1985, 107, 24, 7126–7134Publication Date (Print):November 1, 1985Publication History Published online1 May 2002Published inissue 1…
A quantitative subjective scale of measurement of fabric stiffness called ‘Stifs’ is described. This is based on the easily measured and readily convertible quantitative objective measurement known as the drape coefficient.