Materials Literature
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BaTiO3 ultrafine particles of different size were prepared by Sol-Gel process. Their microstructure was examined at room temperature. The temperature dependence of the dielectric properties of the pressed pellets and fired ceramics of these particles was studied. With the decrease of particle size d, the Curie tempera…
A unique carboxyl proteinase (EC 3.4.23.33), insensitive to the classical inhibitor isovaleryl pepstatin and isolated from Pseudomonas sp. 101 (PCP), is the first example of a prokaryotic enzyme of this class. The gene coding for PCP was cloned, sequenced, and expressed in Escherichia coli. The gene consists of 1,761…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSolid-State Polymerization of 15,17,19,21,23,25-TetracontahexayneShuji Okada, Kikuko Hayamizu, Hiro Matsuda, Atsushi Masaki, Nobutsugu Minami, and Hachiro NakanishiCite this: Macromolecules 1994, 27, 22, 6259–6266Publication Date (Print):October 1, 1994Publication History Pu…
The electrical conductivity of In 2 O 3 ‐ ZrO 2 as well as In 2 O 3 solid solutions doped with SnO 2 , CeO 2 , Nb 2 O 5 , Pr 6 O 11 , and MgO is investigated, in the temperature range between room temperature and 1300°C, and in the oxygen partial pressure range between 5 × 10 − 5 and 1 atm. In 2 O 3 doped with ZrO 2 i…
Pure non-reactive metals develop weak interactions with iono-covalent oxides (insulators) which can be both physical (van der Waals) and chemical (low density interfacial electronic states). As a result, non-wetting is generally observed, the contact angle being larger than 90 degrees. Improvement of wetting can be ob…
Abstract Vibrational spectra of zinc tris(thiourea) sulphate (ZTS), a new semiorganic non‐linear optical crystal, were recorded to determine the symmetries of molecular vibrations. The observed Raman and infrared bands are assigned to molecular vibrations of thiourea, sulphate groups and Zn(thiourea) 3 SO 4 tetrahedra…
A focused ion beam (FIB) has been applied for transmission electron microscope (TEM) sample preparation. The sample tilt method is demonstrated to correct the cross-sectional taper shape of the TEM sample. The origin of the taper is discussed using the time-dependent surface development under the FIB trench milling. A…
A new series of chiral homologous thiobenzoates with non-chiral end chains ranging from heptyloxy to octadecyloxy has been synthesized and characterized. The mesomorphic properties have been analysed by optical microscopy on pure compounds and mixtures, DSC, and electro-optical and pitch measurements. They display a v…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTSynthesis and Characterization of Poly[(R,S)-3-hydroxybutyrate-b-6-hydroxyhexanoate] as a Compatibilizer for a Biodegradable Blend of Poly[(R)-3-hydroxybutyrate] and Poly(6-hydroxyhexanoate)Hideki Abe, Yoshiharu Doi, and Yoshiharu KumagaiCite this: Macromolecules 1994, 27, 2…
Abstract Thermoreversible reaction of Diels‐Alder polymer composed of difurufuryladipate with bismaleimidodiphenylmethane was studied in dimethylformamide solution. The retro‐Diels‐Alder degradation occurred gradually at 90°C and Diels–Alder polymerization proceeded quickly at 60°C. © 1994 John Wiley & Sons, Inc.
Li 4 siO 4 , M r =119.84, λ(Mo Kα)=0.71073 A 150 K, monoclinic, P2 1 /m, a=11.532 (1), b=6.075 (1), c=16.678 (1) A, β=99.04 (4) o , V=1153.9 (2) A 3 , μ(Mo Kα)=5.3 cm -1 , Z=14, F(000)=812, D x =2.414 Mg m -3 , R=0.028, wR=0.025 for 2255 observed reflections with I>2.5σ(I). The crystal structure of lithium nesosilicat…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTQuasi-two-dimensional metallic character of Sm2Te5 and SmTe3E. DiMasi, B. Foran, M. C. Aronson, and S. LeeCite this: Chem. Mater. 1994, 6, 10, 1867–1874Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published inissue 1 October 1994https…
Fabric hand evaluation, previously applied to men's suiting, is used here to assess the touch or feel of nonwoven fabrics. In this method, fabric mechanical property parameters are converted by a first conversion equation (equation type I ) to numbers (the hand value or Hv) that express three primary hand values (the…
Dense SiC‐whisker‐reinforced mullite composites with up to 50 vol% whiskers can be obtained by tape casting and hot pressing. The tape casting process results in high degrees of SiC whisker orientation as determined visually and by X‐ray diffraction. The ability to achieve dense composites with as much as 50 vol % whi…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTUnusually Strong Adsorption of Highly Charged Heteropolytungstate Anions on Mercury Electrode SurfacesChaoying. Rong and Fred C. AnsonCite this: Anal. Chem. 1994, 66, 19, 3124–3130Publication Date (Print):October 1, 1994Publication History Published online1 May 2002Published…
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDetermination of the Critical Micelle Concentration of Block Copolymer Micelles by Static Light ScatteringKarine Khougaz, Zhisheng Gao, and Adi EisenbergCite this: Macromolecules 1994, 27, 22, 6341–6346Publication Date (Print):October 1, 1994Publication History Published onl…
The identification of a myriad of small peptide and carbohydrate ligands recognized by cell surface receptors has generated enthusiasm for the use of these ligands of components of biomaterials for controlling cellular interactions. Achieving control of cell interactions via ligand modification of materials also requi…
In the course of studies on anaerobic citrate metabolism in Klebsiella pneumoniae, the DNA region upstream of the gene for the sodium-dependent citrate carrier (citS) was investigated. Nucleotide sequence analysis revealed a cluster of five new genes that were oriented inversely to citS and probably form an operon. Th…
Book Review| Online October 01 1994 Burn Care and Rehabilitation: Principles and Practice Burn Care and Rehabilitation: Principles and Practice. Reginald L. Richard, MS, PT, & Marlys J. Staley, MS, PT, (Eds.) ( 1994) F. A. Davis, 1915 Ark Street, Philadelphia, PA 19103 711 pages, $90.00. Cynthia D. Alexander, MS, OTR,…
In summary, the compounds reported here demonstrate that it is possible to design chromophores that simultaneously exhibit large nonlinearity and good thermal stability. Furthermore, with the synthesis of bis(4-hydroxyphenyl)thiobarbituric acid, we believe that it should be possible to covalently incorporate these and…