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  • 1
    Electronic Resource
    Electronic Resource
    Properties and Stabilities of MX, MX2, and M2X2 Compounds (M = Zn, Cd, Hg; X = F, Cl, Br, I) (1995)
    s.l. : American Chemical Society
    Inorganic chemistry 34 (1995), S. 5597-5605 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic00126a033
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  • 2
    Electronic Resource
    Electronic Resource
    Buffered Type-II Hybrid ARQ Protocol for DS-SSMA Packet Radio Systems (1998)
    Springer
    International journal of wireless information networks 5 (1998), S. 203-217 
    Details
    ISSN: 1572-8129
    Keywords: AUTOMATIC REPEAT REQUEST ; CODE DIVISION MULTIPLE ACCESS ; EQUILIBRIUM POINT ANALYSIS ; PACKET RADIO NETWORK ; SPREAD-SPECTRUM COMMUNICATION
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The performance and stability of a slotteddirect-sequence spread-spectrum multiple-access (DSSSMA)packet radio network employing the type-II hybridautomatic-repeat-request (ARQ) protocol withfinite-length transmitter buffers are considered. Theequilibrium point analysis (EPA) technique is employedto analyze the system stability and to approximatelycompute the system throughput, delay, and packetrejection probability. It is found that the systemexhibits bistable behavior in some situations. Issues ofsystem design, such as the required length of thetransmitter buffers and the desirable region ofoperation based on a predetermined performancerequirement for packet rejection, are alsoinvestigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1018846309173
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  • 3
    Electronic Resource
    Electronic Resource
    A quasi-layer structure of trinuclear molybdenum(IV) cluster, [Mo3S7(S2CNEt2)3]I·S8 (1999)
    Springer
    Journal of chemical crystallography 29 (1999), S. 1019-1022 
    Details
    ISSN: 1572-8854
    Keywords: trinuclear molybdenum cluster ; quasi-layer structure ; solid state reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Physics
    Notes: Abstract The title compound, [Mo3(μ3-S)(μ-S2)3(S2CNEt2)3]I·S8, was obtained by solid state reaction of (NH4)2MoS4, Et2NCS2Na, and Et4NI at low heating temperature and crystallizes in space group P $${\bar 1}$$ with a = 13.572(3), b = 13.813(4), c = 13.239(3) Å, α = 92.63(3), β = 100.15(3), γ = 117.89(2)°, V = 2136(2) Å3, and D calc. = 2.08 g/cm3 for Z = 2. The structure reveals that it consists of a trinuclear Mo cluster molecule, [Mo3S7(S2CNEt2)3]I, and one S8, which are connected to form a quasi-layer structure by the interaction between S8 and the S atoms of the cluster molecule.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1009572717043
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  • 4
    Electronic Resource
    Electronic Resource
    Analogy between real irreducible tensor operator and molecular two-particle operator (1997)
    Springer
    Theoretical chemistry accounts 96 (1997), S. 135-139 
    Details
    ISSN: 1432-2234
    Keywords: Key words: Irreducible tensor operator ; Matrix element ; Real basis ; Symmetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract . Molecular matrix elements of a physical operator are expanded in terms of polycentric matrix elements in the atomic basis by multiplying each by a geometrical factor. The number of terms in the expansion can be minimized by using molecular symmetry. We have shown that irreducible tensor operators can be used to imitate the actual physical operators. The matrix elements of irreducible tensor operators are easily computed by choosing rational irreducible tensor operators and irreducible bases. A set of geometrical factors generated from the expansion of the matrix elements of irreducible tensor operator can be transferred to the expansion of the matrix elements of the physical operator to compute the molecular matrix elements of the physical operator. Two scalar product operators are employed to simulate molecular two-particle operators. Thus two equivalent approaches to generating the geometrical factors are provided, where real irreducible tensor sets with real bases are used.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002140050214
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  • 5
    Electronic Resource
    Electronic Resource
    Crustacean hyperglycaemic hormone in the nervous system of the primitive crustacean species Daphnia magna and Artemia salina (Crustacea: Branchiopoda) (1997)
    Springer
    Cell & tissue research 287 (1997), S. 565-576 
    Details
    ISSN: 1432-0878
    Keywords: Key words: Crustacean hyperglycaemic hormone ; Immunocytochemistry ; Neurohaemal organ ; Daphnia magna ; Artemia salina (Crustacea)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract. Crustacean hyperglycaemic hormone-immunoreactive neuronal systems are detected in the central and peripheral nervous systems of two entomostracan crustaceans, Daphnia magna and Artemia salina, by immunocytochemistry using specific antisera against crustacean hyperglycaemic hormones of the decapod crustaceans Orconectes limosus and Carcinus maenas. In D. magna, four small putative interneurones are detected in the brain. In the thorax, ten bipolar peripheral neurones are stained by both antisera. They are obviously segmental homologues with centrally projecting axons that form interdigitating varicose fibres and terminals in putative neurohaemal areas next to the surface of the anterior part of the thoracic ganglia. Similar immunopositive neurones occur both in the central and peripheral nervous systems of A. salina. A total of five groups of neurones occur in the protocerebrum, the deutocerebrum and the mandibular ganglion. Some of the protocerebral neurones are bipolar and project to the dorsal frontal organ. A single pair of peripheral multipolar neurones in the maxillary segment projects centrally into the ventral nerve cord and innervates unidentified somatic muscles and tissues in the maxillary and the first appendage segments. None of the brain neurones in both species show similarities to decapod X-organ sinus gland neurosecretory neurones. Chromatography of brain extracts of D. magna combined with immunodot blotting revealed two strongly immunoreactive fractions at retention times close to that of the crustacean hyperglycaemic hormone of crayfish. Moreover, preabsorption controls suggest that the cross-reacting peptides of D. magna and A. salina are structurally closely related to those of decapods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410050779
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  • 6
    Electronic Resource
    Electronic Resource
    Cyanide adsorbed on coinage metal electrodes: A relativistic density functional investigation (1998)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 67 (1998), S. 175-185 
    Details
    ISSN: 0020-7608
    Keywords: potential dependence ; vibrational frequency ; coinage metal electrodes ; relativistic effects ; density functional calculation ; Chemistry ; Theoretical, Physical and Computational Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The adsorptive properties of cyanide (CN-) on coinage metal (M) electrodes (M=Cu, Ag, Au) have been investigated using a relativistic density functional method. The way to model the electrochemical potential applied to the electrodes is to consider the systems in the presence of a perturbative external field F. The field-perturbative approach is proven to be a suitable method in interpreting the observed spectral shifts with electrode potential. The calculated potential-dependent shifts of ωM(SINGLE BOND)CN and ωC(SINGLE BOND)M are similar for the three metals, in agreement with experiment observations. The relativistic effects are required to account for the similarity in the frequency shifts of ωM(SINGLE BOND)CN. The calculated vibrational tuning rates dωC(SINGLE BOND)N/dF are 6.61×10-7, 6.61×10-7, and 5.64×10-7 cm-1/(V/cm) for M=Cu, Ag, and Au, respectively. The coupling of the M(SINGLE BOND)CN and C(SINGLE BOND)N internal modes contributes significantly (about 25%) to the size of the frequency shifts ΔωC(SINGLE BOND)N of the ligand. The effect of electric fields on the metal(SINGLE BOND)CN- bonding is also investigated. It is shown that changes in the magnitude of CN- to the metal donation and M(SINGLE BOND)CN bond strength occur under the influence of the electric field.   © 1998 John Wiley & Sons, Inc. Int J Quant Chem 67: 175-185, 1998
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Symmetry reduction of the matrix elements of a two-particle operator (1996)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 60 (1996), S. 833-841 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Local coordinate systems are chosen for each quadruple of atoms relative to a four-center integral, in order to avoid linear combinations of orbitals when symmetry operations perform on an orbital. This choice can utilize the complete molecular symmetry to attain the optimal number of symmetry-unique integrals and to construct two-particle matrix elements by multiplying symmetry-unique integrals, called the “standard four-center integrals,” by the corresponding coefficients, called the “C coefficients.” A simple algorithm to use the complete molecular symmetry to reduce calculations of molecular matrix elements is outlined for general highly symmetric molecules. A tetrahedral molecule is analyzed. © 1996 John Wiley & Sons, Inc.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Real irreducible tensorial sets (1996)
    New York, NY : Wiley-Blackwell
    International Journal of Quantum Chemistry 59 (1996), S. 173-182 
    Details
    ISSN: 0020-7608
    Keywords: Computational Chemistry and Molecular Modeling ; Atomic, Molecular and Optical Physics
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A simple formalism of real irreducible tensorial sets of real bases is proposed. The definition of the real bases, the coupling of the real bases, and the transformation of the real bases in a group chain including the three-dimensional rotation group and the molecular point groups are studied. The double coset technique is used to derive the close formulas for generating the coupling coefficients and the transformation coefficients. © 1996 John Wiley & Sons, Inc.
    Type of Medium: Electronic Resource
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  • 9
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    Properties and Stabilities of MX, MX2, and M2X2 Compounds (M = Zn, Cd, Hg; X = F, Cl, Br, I) (1995)
    American Chemical Society
    Details
    Publication Date: 1995-10-01
    Print ISSN: 0020-1669
    Electronic ISSN: 1520-510X
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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  • 10
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    Crustacean hyperglycaemic hormone in the nervous system of the primitive crustacean species Daphnia magna and Artemia salina (Crustacea: Branchiopoda) (1997)
    Springer
    Details
    Publication Date: 1997-02-20
    Print ISSN: 0302-766X
    Electronic ISSN: 1432-0878
    Topics: Biology , Medicine
    Published by Springer
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