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  • 1
    Electronic Resource
    Electronic Resource
    Effects of Adsorption and Reaction on the Second Harmonic Generation of Langmuir-Blodgett Films (1995)
    s.l. : American Chemical Society
    Langmuir 11 (1995), S. 3620-3622 
    Details
    ISSN: 1520-5827
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/la00010a004
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  • 2
    Electronic Resource
    Electronic Resource
    Investigation of nitric oxide and Ar annealed SiO2/SiC interfaces by x-ray photoelectron spectroscopy (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 86 (1999), S. 4316-4321 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Silicon dioxide (SiO2)/silicon carbide (SiC) structures annealed in nitric oxide (NO) and argon gas ambiences were investigated using x-ray photoelectron spectroscopy (XPS). The XPS depth profile analysis shows a nitrogen pileup of 1.6 at. % close to the NO annealed SiO2/SiC interface. The results of Si 2p, C 1s, O 1s, and N 1s core-level spectra are presented in detail to demonstrate significant differences between NO and Ar annealed samples. A SiO2/SiC interface with complex intermediate oxide/carbon states is found in the case of the Ar annealed sample, while the NO annealed SiO2/SiC interface is free of these compounds. The Si 2p spectrum of the Ar annealed sample is much broader than that of the NO annealed sample and can be fitted with three peaks compared with the two peaks in the NO annealed sample, indicating a more complex interface in the Ar annealed sample. Also the O 1s spectrum of the NO annealed samples is narrow and symmetrical and can be fitted with only one peak whereas that of the Ar annealed sample is broad and asymmetrical and is fitted with two peaks. It is evident that the Ar annealed sample contains some structural defects at the interface, which have been removed from the interface by NO annealing as shown by O 1s spectra. The C 1s spectra at the interface reveal the subtle difference between NO and Ar annealed samples. An additional peak representing the interface oxide/carbon species is observed in the Ar annealed sample. At the interface, the N 1s spectrum is symmetrical and can be fitted with one peak, representing the strong Si(Triple Bond)N bond. However, the N 1s and C 1s XPS spectra acquired in the bulk of the dielectric showed not only the Si(Triple Bond)N bond but also a trace amount of the N–C bond. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.371363
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  • 3
    Electronic Resource
    Electronic Resource
    Partition of Nonpolar Organic Pollutants from Water to Soil and Sediment Organic Matters (1995)
    s.l. : American Chemical Society
    Environmental science & technology 29 (1995), S. 1401-1406 
    Details
    ISSN: 1520-5851
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/es00005a036
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  • 4
    Electronic Resource
    Electronic Resource
    Interfacial characteristics of N2O and NO nitrided SiO2 grown on SiC by rapid thermal processing (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 70 (1997), S. 2028-2030 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Interfacial characteristics of Al/SiO2/n-type 6H–SiC metal–oxide–semiconductor capacitors fabricated by rapid thermal processing (RTP) with N2O and NO annealing are investigated. Interface state density was measured by a conductance technique at room temperature. RTP oxidation in pure O2 leads to an excellent SiO2/n-type 6H–SiC interface with interface state density in the order of 1010–1011 eV−1 cm−2. NO annealing improves the SiO2/n-type 6H–SiC interface, while N2O annealing increases the interface state density. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.118773
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  • 5
    Electronic Resource
    Electronic Resource
    Exon-Intron Structure, Analysis of Promoter Region, and Chromosomal Localization of the Human Type 1 σ Receptor Gene (1998)
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 70 (1998), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: σ receptor is a protein that interacts with a variety of psychotomimetic drugs including cocaine and amphetamines and is believed to play an important role in the cellular functions of various tissues associated with the endocrine, immune, and nervous systems. Here we report on the structure and organization of the human gene coding for this receptor. The gene is ∼7 kbp long and contains four exons, interrupted by three introns. Exon 3 is the shortest (93 bp), and exon 4 is the longest (1,132 bp). Among the introns, intron 3 is the longest (∼1,250 bp). Exon 2 codes for the single transmembrane domain present in the receptor. 5′ rapid amplification of cDNA end reactions with mRNA from the JAR human trophoblast cell line have identified 56 bp upstream of the translation start codon as the initiation site for transcription. This transcription start site has been confirmed by RNase protection analysis. Structural analysis of the 5′ flanking region has revealed that the gene is TATA-less. This region, however, contains a CCAATC box in the reverse complement and several GC boxes that are recognition sites for SP1. There are also consensus sequences for the liver-specific transcription factor nuclear factor-1/L, for a variety of cytokine responsive factors, and for the xenobiotic responsive factor called the arylhydrocarbon receptor. Southern blot analysis of the genomic DNA from Chinese hamster-human and mouse-human hybrid cell lines and fluorescent in situ hybridization with human metaphase chromosome spreads have shown that the gene is located on human chromosome 9, band p13, a region known to be associated with different psychiatric disorders.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1471-4159.1998.70020443.x
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  • 6
    Electronic Resource
    Electronic Resource
    Cloning and Functional Characterization of a σ Receptor from Rat Brain (1998)
    Oxford, UK : Blackwell Science Ltd
    Journal of neurochemistry 70 (1998), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract: We have cloned a σ receptor from rat brain and established its functional identity using a heterologous expression system. The cloned cDNA (1,582 bp long) codes for a protein of 223 amino acids that possesses a single putative transmembrane domain. The amino acid sequence of the rat brain σ receptor is highly homologous to that of the σ receptor recently cloned from guinea pig liver and a human placental cell line but is not related to any other known mammalian receptors. When expressed in HeLa cells, the rat brain σ receptor cDNA leads to a two- to threefold increase in haloperidol binding, and this cDNA-induced binding is sensitive to inhibition by several σ receptor-specific ligands. Kinetic analysis using the heterologous expression system has revealed that the rat brain σ receptor interacts with haloperidol with an apparent dissociation constant (KD) of 3 nM. Functional expression of the cloned rat brain σ receptor in HeLa cells also leads to an increase in the binding of two other σ ligands, namely, (+)-pentazocine and (+)-3-(3-hydroxyphenyl)-N-(1-propyl)piperidine (PPP). Pharmacological characterization of the cloned rat brain σ receptor reveals that it exhibits severalfold higher affinity for clorgyline than for 1,3-di(2-tolyl)guanidine, it interacts with progesterone and testosterone, and its interaction with PPP is markedly enhanced by phenytoin. In addition, transfection of MCF-7 cells, which do not express type 1 σ receptor mRNA or activity, with the cloned rat brain cDNA leads to the appearance of haloperidol-sensitive binding of (+)-pentazocine, a selective type 1 σ receptor ligand. These data show that the cloned rat brain cDNA codes for a functional type 1 σ receptor. Northern blot analysis with poly(A)+ RNA isolated from various rat tissues has indicated that the σ receptor-specific transcript, 1.6 kb in size, is expressed abundantly in liver and moderately in intestine, kidney, brain, and lung.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1471-4159.1998.70030922.x
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  • 7
    Electronic Resource
    Electronic Resource
    Morphological and Physiological Characteristics of Discontinuous Linear Atrial Ablations During Atrial Pacing and Atrial Fibrillation (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of cardiovascular electrophysiology 10 (1999), S. 0 
    Details
    ISSN: 1540-8167
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Discontinuous Atrial Ablations. Introduction: Linear atrial ablations are thought to he necessary to accomplish successful catheter ablation of atrial fibrillation. In order to investigate the conduction characteristics of atrial myocardium in regions of linear lesion discontinuity gaps), we performed activation sequence mapping in gap regions during atrial pacing and atrial fibrillation. Methods and Results. In seven dogs, a linear epicardial ablation was created on the right atrial free wall with a discontinuous segment (gap) in the mid-portion of the lesion. A plaque electrode was used to measure conduction across the gap. Conduction was assessed during (1) atrial pacing from the edge of the plaque electrode during sinus rhythm, and (2) during atrial fibrillation. After each series of measurements, the lesion gap was decreased by creating additional radiofrequency ablations and repeat conduction maps were obtained. The process was repeated until conduction block was observed during atrial pacing. Gap lengths ranged from 0 to 25 mm. During atrial pacing, gaps as narrow as 2 mm demonstrated normal conduction and gaps as large as 5 mm demonstrated block during pacing. Although conduction block was never present across gaps greater than 5 mm, the ability to predict conduction block as a function of gap width was difficult for lesions ≤ 5 mm due to a significant degree of overlap between normal conduction and conduction block in this gap range. During atrial fibrillation, 1/175 (0.6%) mapped wavelets conducted across gaps that demonstrated block during pacing; whereas, 411/600 (68.5%; P 〈 0.0001) wavelets conducted across gaps that did not demonstrate block during pacing (P = NS compared to preablation measurements). Histologically normal atrial myocytes were observed within gaps exhibiting conduction block. Conclusions: Visible gaps 〉 5 mm rarely demonstrate conduction block during atrial pacing and atrial fibrillation; whereas, gaps ≤ 5 mm in length may demonstrate block. Lesion gaps that do not demonstrate conduction block during atrial pacing have no higher rate of functional conduction block during atrial fibrillation than fibrillating atria without ablation lesions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1540-8167.1999.tb00686.x
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  • 8
    Electronic Resource
    Electronic Resource
    MMW Source CAD in Quasi-Optical Resonator (1999)
    Springer
    International journal of infrared and millimeter waves 20 (1999), S. 867-881 
    Details
    ISSN: 1572-9559
    Keywords: Quasi-Optical Techniquere ; Millimeter Wave ; Global Optima CAD
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract This paper presents a quasi-optical resonator that design methode basic on IBM PC computer (CAD). There is an exellent method to calculate global optima of the fundamental mode power, fractional power of the fundamental mode and combining efficiency etc. It also presents a process of CAD of microcomputer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021722201100
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  • 9
    Electronic Resource
    Electronic Resource
    Little-Group Approach to Gauge Theory (1999)
    Springer
    International journal of theoretical physics 38 (1999), S. 1407-1414 
    Details
    ISSN: 1572-9575
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Factor representations of the nonsemisimpleE(2)-like little group for massless particles are usedto construct free gauge theories for arbitrary spin,which explicitly solves the dichotomy between the unitary requirement and the appearance of gaugedegrees of freedom. This conceptually new approach mayhelp us understand the deep relation between gaugetheory and space-time symmetry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1026632914237
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  • 10
    Electronic Resource
    Electronic Resource
    On the determination of the melting point of semicrystalline polymer by DSC (1996)
    Springer
    Journal of thermal analysis and calorimetry 46 (1996), S. 871-878 
    Details
    ISSN: 1572-8943
    Keywords: DSC ; melting point ; polyethylene ; Raman-active longitudinal acoustical mode ; semi-crystalline polymers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This is a study for criteria to judge the melting point of semi-crystalline polymers from the DSC endotherm for polymer melting. Beyond standard indium DSC melting results an evaluation has been made on a series of polyethylenes for which crystal sizes were measured and predicted from Raman LAM analysis. The results confirm the conclusion of Prof. Wunderlich that the DSC content of melting is the proper basis of reporting melting points.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01983607
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