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  • Cell & Developmental Biology  (115)
  • Inorganic Chemistry  (62)
  • Wiley-Blackwell  (177)
  • American Geophysical Union
  • PANGAEA
  • Springer
  • 1990-1994  (177)
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  • Wiley-Blackwell  (177)
  • American Geophysical Union
  • PANGAEA
  • Springer
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  • 1
    Electronic Resource
    Electronic Resource
    Microscopic anatomy and ultrastructure of the introvert of Priapulus caudatus and P. tuberculatospinosus (Priapulida) (1994)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 220 (1994), S. 281-293 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Introverts of Priapulus caudatus and P. tuberculatospinosus bear 25 rows of scalids, as well as 8 spines and scattered papillae in the region the circumoral lip. These, as well as the first ring of pharyngeal teeth in P. tuberculatospinosus, are sensory organs. Although superficially they differ between species, they are all characterized by apical and/or subapical openings which are located on tiny cuticular tubules. All sensory organs contain cilia bearing bipolar receptor cells. The 8 sensory spines situated between the circumoral area and the beginning of the scalids are ultrastructurally similar to the scalids. The introvert and pharyngeal body walls, and associated muscles are described. © 1994 Wiley-Liss, Inc.
    Additional Material: 26 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1052200307
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  • 2
    Electronic Resource
    Electronic Resource
    Das Reaktionsverhalten von Phosphorpentahalogeniden mit Übergangsmetallcarbonylen. III. Die Reaktion von PBr5 mit den Hexacarbonylen des Molybdäns und Wolframs (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 589 (1990), S. 214-220 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactivity of Phosphorus Pentahalides with Transition Metal Carbonyls. III. Reactivity of PBr5 with Hexacarbonyls of Molybdenum and TungstenPBr5 reacts with M(CO)6 (M = Mo, W) already at room temperature in CH3CN as solvent. Independend on the reaction condition WBr4(CH3CN)2 was obtained in the reaction of PBr5 with W(CO)6. In the case of Mo(CO)6 the complexes MoBr3(CH3CN)3 and MoBr4(CH3CN)2, respectively, were isolated depending on the amount of PBr5 and the reaction temperature. The structure of the products is discussed on the basis of the IR spectra and of magnetic moments.
    Notes: PBr5 reagiert mit M(CO)6 (M = Mo, W) in Acetonitril bereits bei Raumtemperatur. Für W(CO)6 wird unabhängig von den Reaktionsbedingungen stets WBr4(CH3CN)2 erhalten. Für Mo(CO)6 wird in Abhängigkeit von der Reaktionsführung, der Menge an PBr5 und der Reaktionstemperatur MoBr3(CH3CN)3 bzw. MoBr4(CH3CN)2 gebildet. Die Struktur der erhaltenen Produkte wird anhand der IR-Spektren und der magnetischen Messungen diskutiert.
    Additional Material: 3 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905890123
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  • 3
    Electronic Resource
    Electronic Resource
    Reaktionsverhalten von Phosphorpentahalogeniden mit Übergangsmetallcarbonyl-Verbindungen. IV [1 - 3]. Das Reaktionsverhalten von Phosphorpentahalogeniden gegenüber [CpM(CO)3]2 (M = Cr, Mo, W) Die Kristallstruktur von CpCrCl2CH3CN (1990)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 591 (1990), S. 221-229 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Reactivity of Phosphorus Pentahalides with Transition Metal Carbonyls. IV. Reactivity of Phosphorus Pentahalides with [CpM(CO)3]2 (M = Cr, Mo, W). Crystal Structure of CpCrCl2CH3CNPX5 (X = Cl, Br) reacts with cyclopentadienyl complexes of the type [CpM(CO)3]2 (M = Cr, Mo, W) at room temperature in high yields to give complexes CpCrX2CH3CN and CpMX4CH3CN (X = Cl, Br; M = Mo, W), respectively. The complexes were characterized by IR and ESR spectroscopy and magnetic measurements. CpCrCl2CH3CN crystallizes in the space group P21/c as a monomer with distorted tetrahedral geometry at chromium. The Cp ring is disordered.
    Notes: Die Reaktion von PX5 mit Cyclopentadienylderivaten des Typs [CpM(CO)3]2 (M = Cr, Mo, W; Cp = η5-C5H5) führt bei Raumtemperatur in hohen Ausbeuten zu den Halogeno-Komplexen CpCrX2CH3CN bzw. CpMX4CH3CN (X = Cl, Br; M = Mo, W). Die erhaltenen Derivate werden anhand der IR- und ESR-Spektroskopie, sowie der Messung magnetischer Daten charakterisiert. CpCrCl2CH3CN kristallisiert in der Raumgruppe P21/c als Monomer mit verzerrter tetraedrischer Geometrie am Chrom. Der Cp-Ring ist ungeordnet.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19905910127
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  • 4
    Electronic Resource
    Electronic Resource
    Preparation and crystal structure of the La2Ni12P5 and isotypic ternary lanthanoid - Nickel phosphides (1993)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 619 (1993), S. 587-592 
    Details
    ISSN: 0044-2313
    Keywords: Lanthanoid-nickel phosphides ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Darstellung und Kristallstruktur von La2Ni12P5 und isotypen ternären Lanthanoid-Nickel-PhosphidenDas neue ternäre Phosphid La2Ni12P5 wurde durch Aufschmelzen reiner Komponenten in einem Lichtbogenofen synthetisiert und seine Kristallstruktur durch Einkristalldaten belegt. La2Ni12P5 ist ein erster Vertreter eines neuen Strukturtyps: Raumgruppe P21/m, a = 10,911(3), b = 3,696(2), c = 13,174(4) Å, β = 108,02(2)°, V = 505,2(6) Å3, Z = 2. Die Lageparameter wurden “anisotrop” aus 1 284 Io(hkl) zu RF = 0,0278, RW = 0,0287 (I 〉 3s̰I; 116 Parameter) verfeinert. Charakteristisch für den Aufbau ist die trigonal-prismatische Koordination der Phosphoratome. Die isotypen Phosphide Ln2Ni12P5 (Ln = Ce, Pr, Nd und Eu) wurden ebenfalls dargestellt und durch Pulverdaten charakterisiert.
    Notes: The new ternary phosphide La2Ni12P5 has been prepared by direct arc melting of the components as pure metals and red phosphorus. The crystal structure has been determined using X-ray single crystal diffraction data. The compound exhibits a new type of crystal structure, P21/m with lattice parameters a = 10.911(3), b = 3.696(2), c = 13.174(4) Å, β = 108.02(2)°, V = 505,2(6) Å3, Z = 2. Atomic parameters least squares refinement of 116 independent variables (anisotropic approximation for thermal vibrations) employed 1 284 independent Io(hkl); RF = 0.0278 and RW = 0.0287. The crystal structure is characterized by trigonal prismatic arrangement of phosphorus atoms stacking variant of infinite (with phosphorus centered) columns built by metal trigonal prisms ‖ [010]. Two or three such columns are connected through common edges (lanthanum atoms). The compounds RE2Ni12P5 (where RE = Ce, Pr, Nd and Eu) display the same with La2Ni12P5 crystal structure. Lattice parameters of these compounds have been refined using powder diffraction data.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19936190326
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  • 5
    Electronic Resource
    Electronic Resource
    Transition Metal Chemistry of Main Group Hydrazides, VI. New Directed Synthetic Strategies to Functionalized Heterocyclic Phosphorus(III) Hydrazides. First Examples of Crystal and Molecular Structures of [RPN(Me)N(H)]2 (R = Et, Ph, and tBu) (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 979-984 
    Details
    ISSN: 0009-2940
    Keywords: Cyclophosphahydrazides ; Dinitrogen-bridged ; Conformation ; Chair and Boat forms ; Dinuclear Mo(0) complexes ; 1,2,4,5,3,6-Tetrazadiphosphorinanes ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The reactions of methylhydrazine with RPC12 (R = Et, tBu, and Ph) produced the cyclic phosphorus (III) hydrazides (1,2,4,5,3,6-tetrazadiphosphorinanes) [RPN(Me)N(H)2 (R = Et, 1; (Ph, 2; tBu, 3) in good yields. The 1H-and 31P-NMR spectroscopic analysis indicated that 1 exists in chair and boat conformations. However, it crystallizes in the chair conformation exclusively. The X-ray crystallographic investigation of all the three cyclo-phosphorus hydrazides 1-3 confirms the existence of these compounds in the chair conformations in the solid state. The reaction of Mo(CO)4-(NHC5H10)2 with 1 and 2 gives the dinuclear Mo(0) complexes [{Mo(CO)4(NHC5H10)}2(μ-[RPN(Me)N(H)]2}] (R = Et, 5; Ph, 6). Based on 1H- and 31P-NMR spectroscopic data, a bridging dinuclear dimetallic formulation is proposed for 5 and 6. The IR spectra indicate that the carbonyls are disposed in cis-geometry around the Mo(0) center.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270603
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  • 6
    Electronic Resource
    Electronic Resource
    Transition Metal Chemistry of Main Group Hydrazides, 9. Platinum Complexes of Diphosphanylhydrazides R2PN(Me)N(Me)PR2 · PtCl2 (R = OPh, o-OC6H4CH2CHCH2) (1994)
    Weinheim : Wiley-Blackwell
    Berichte der deutschen chemischen Gesellschaft 127 (1994), S. 1355-1357 
    Details
    ISSN: 0009-2940
    Keywords: Diphosphanylhydrazides ; Diphosphanes, dinitrogen-bridged ; Cycloplatinaphosphahydrazides ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: While the transition metal complexes of bis(phosphanyl)amines (PII-N-PIII) have been known for over three decades, the ligating properties of the next homologue PIII-N-N-PIII have been unprecedented so far. The X-ray structures of cycloplatinaphosphanehydrazides, [(OR)2PN(Me)N(Me)P(OR)2-PtCl2], reveal short distances for the P-N [1.639(5) Å] bonds.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cber.19941270805
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  • 7
    Electronic Resource
    Electronic Resource
    PKC mediates 12(S)-HETE-induced cytoskeletal rearrangement in B16A melanoma cells (1993)
    New York, NY : Wiley-Blackwell
    Cell Motility and the Cytoskeleton 26 (1993), S. 49-65 
    Details
    ISSN: 0886-1544
    Keywords: fatty acid ; MHC ; MLC ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The fatty acid 12(S)-HETE may be a new second messenger capable of activating PKC. In tumor cells 12(S)-HETE stimulates cytoskeleton-dependent cellular responses such as adhesion and spreading. Analysis of 12(S)-HETE effects on B16a melanoma cell cytoskeleton revealed reversible rearrangement of microtubules, microfilaments, the actin-binding proteins, vinculin, myosin heavy (MHC) and light chains (MLC), as well as bundling of vimentin intermediate filaments. The alterations in microfilaments and intermediate filaments occurred very rapidly, i.e., 5 min after exposure of tumor cells to 12(S)-HETE. The 12(S)-HETE-induced cytoskeletal alterations were accompanied by centrifugal organelle-translocation. Interestingly, MLC exhibited clear association with the cytoplasmic organelles. Biochemical analysis of the 12(S)-HETE effect indicated a PKC-mediated reversible hyperphosphorylation of MLC, vimentin, and a 130 kD cytoskeletal-associated protein. Optimal effects were obtained after 5 min treatment with 12(S)-HETE at 0.1 μM concentration. 12(S)-HETE pretreatment induced tumor cell spreading on a fibronectin matrix which required the intactness of all three major cytoskeletal components. The spreading process was dependent upon the activity of PKC. Our data suggest that 12(S)-HETE is a physiological stimulant of PKC. Further, it induces rearrangement of the cytoskeleton of tumor cells in interphase resulting in the stimulation of cytoskeleton-dependent cell activity such as spreading. © 1993 Wiley-Liss, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cm.970260106
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  • 8
    Electronic Resource
    Electronic Resource
    Inhibition of virus-induced cell fusion by apolipoprotein A-I and its amphipathic peptide analogs (1991)
    New York, N.Y. : Wiley-Blackwell
    Journal of Cellular Biochemistry 45 (1991), S. 224-237 
    Details
    ISSN: 0730-2312
    Keywords: herpes simplex virus ; high-density lipoproteins ; amphipathic helixes ; fusion-inhibitory peptides ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Apolipoprotein A-I (apoA-I), the major protein component of serum high-density lipoproteins (HDL), was found to inhibit herpes simplex virus (HSV)-induced cell fusion at physiological (∼ 1 μM) concentrations, whereas HDL did not exert any inhibitory effect. Lipid-associating, synthetic amphipathic peptides corresponding to residues 1-33 (apoA-I[1-33]) or residues 66-120 (apoA-I[66-120]) of apoA-I, also inhibited HSV-induced cell fusion, whereas a peptide corresponding to residues 8-33 of apoA-I (apoA-I[8-33]), which fails to associate with lipids, did not exert any inhibitory effect. These results suggest that lipid binding may be a prerequisite for peptide-mediated fusion inhibition. Consistent with this idea, a series of lipid-binding 22-amino-acid-residue-long synthetic amphipathic peptides that correspond to the amphipathic helical domains of apoA-I (A-I consensus series), or 18-residue-long model amphipathic peptides (18A series), were found to exert variable levels of fusion-inhibitory activity. The extent of fusion-inhibitory activity did not correlate with hydrophobic moment, hydrophobicity of the nonpolar face, helix-forming ability, or lipid affinity of the different peptides. Peptides in which the nonpolar face was not interrupted by a charged residue displayed greater fusion-inhibitory activity. Also, the presence of positively charged residues at the polar-nonpolar interface was found to correlate with higher fusion-inhibitory activity.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcb.240450214
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  • 9
    Electronic Resource
    Electronic Resource
    Expression and regulation of casein kinase 2 during heat shock in Verticillium dahliae (1992)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 31 (1992), S. 42-47 
    Details
    ISSN: 1040-452X
    Keywords: Casein kinase II ; Heat shock ; Posttranslational regulation ; Protein synthesis ; Cotton parasite ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: A homogeneous preparation of casein kinase 2 has been isolated from the phytopathogenic fungus Verticillium dahliae (the parasite of cotton). The enzyme consists of three subunits with molecular masses of 53, 41, and 38 kDa. Highly specific immune serum against casein kinase 2 has been obtained. By means of immunoblotting, enzyme-linked immunosorbent assay (ELISA), and immunochemical isolation on protein A-Sepharose, it is shown that the amount of casein kinase 2 increases under heat shock conditions (at least in part due to the synthesis de novo), while the synthesis of the majority of other proteins falls. The activity of casein kinase 2 is supressed during heat shock and so does not correlate with its content. The results give an evidence for the two-step model of casein kinase 2 regulation during heat shock.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080310108
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  • 10
    Electronic Resource
    Electronic Resource
    Mullerian-inhibiting substance secretion is delayed in XX sex-reversed dog embryos (1994)
    New York, NY [u.a.] : Wiley-Blackwell
    Molecular Reproduction and Development 39 (1994), S. 1-7 
    Details
    ISSN: 1040-452X
    Keywords: Testis ; Ovotestis ; True hermaphrodite ; Mullerian duct ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology
    Notes: Sertoli cell secretion of Mullerian-inhibiting substance (MIS) begins shortly after testis differentiation. Mullerian ducts regress following MIS exposure during an embryonic critical period. In dogs with XX sex reversal, Mullerian ducts persist in the presence of testicular tissue. This study was conducted to determine whether MIS is present in ovotestes of XX sex-reversed embryos during the period for Mullerian duct regression in normal males. XX sex-reversed embryos and normal littermates were identified by a combination of karyotype and gonadal histology. The degree of regression in the adjacent Mullerian duct was scored. Immunohistochemical staining was used to detect MIS in the contralateral gonad. Testicular differentiation and MIS secretion were identified in XY embryos at all ages studied (35-46 days). Seminiferous tubules were not observed in gonads of embryos at risk of XX sex reversal between 35-38 days (n = 15), but were observed at 40 and 46 days (n = 3). Although positive staining for MIS was observed in ovotestes, adjacent Mullerian ducts persisted. The degree of seminiferous tubule development was reduced and MIS secretion was delayed in ovotestes, compared to normal testes. Mullerian duct persistence in this model is apparently due to an abnormality in the quantity and timing of MIS secretion during embryonic development.© 1994 Wiley-Liss, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrd.1080390102
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