Nucleotide Sequence of an Arabidopsis cDNA for Geranylgeranyl Pyrophosphate Synthase
P. A. Scolnik, G. E. Bartley; Nucleotide Sequence of an Arabidopsis cDNA for Geranylgeranyl Pyrophosphate Synthase, Plant Physiology, Volume 104, Issue 4,
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51V NMR and EPR Study of Reaction Kinetics and Mechanisms in V2O5 Gelation by Ion Exchange of Sodium Metavanadate Solutions
V2O5 gels produced by sol-gel methods have several potential uses in electronics and catalysis, but the rate and mechanism of the synthesis remain poorly understood. Recent results disagree with models previously proposed. 51V NMR spectra show that the initial reactions involve the consumption of the dioxovanadium cat…
Low-Valent Nickel Thiaporphyrins. Nuclear Magnetic Resonance and Electron Paramagnetic Resonance Studies
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLow-Valent Nickel Thiaporphyrins. Nuclear Magnetic Resonance and Electron Paramagnetic Resonance StudiesPiotr J. Chmielewski, Lechoslaw Latos-Grazynski, and Ewa PacholskaCite this: Inorg. Chem. 1994, 33, 9, 1992–1999Publication Date (Print):April 1, 1994Publication History P…
Temperature-dependent NMR features of theAl65Cu20Ru15icosahedral alloy
The ${\mathrm{Al}}_{65}$${\mathrm{Cu}}_{20}$${\mathrm{Ru}}_{15}$ icosahedral alloy was studied by $^{27}\mathrm{Al}$ nuclear magnetic resonance from 150 to 1110 K. The Knight shift of the unresolved resonance line was observed to significantly increase above 500 K. This uncommon temperature dependence of the Knight sh…
Self-assembly into fibrils of collagen II by enzymic cleavage of recombinant procollagen II. Lag period, critical concentration, and morphology of fibrils differ from collagen I
A recently developed recombinant system for synthesis of human procollagen II by stably transfected host cells was used to prepare adequate amounts of protein to study the self-assembly of collagen II into fibrils. The procollagen II was cleaved to pCcollagen II by procollagen N-proteinase (EC 3.4.24.14), the pCcollag…
Formation and Reactivity of (Octaethyltetraazaporphyrinato)rhodium Complexes
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTFormation and Reactivity of (Octaethyltetraazaporphyrinato)rhodium ComplexesYaping Ni, Jeffrey P. Fitzgerald, Patrick Carroll, and Bradford B. WaylandCite this: Inorg. Chem. 1994, 33, 9, 2029–2035Publication Date (Print):April 1, 1994Publication History Published online1 May…
New Polyamides with Large Second-Order Nonlinear Optical Properties
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNew Polyamides with Large Second-Order Nonlinear Optical PropertiesChristoph Weder, Peter Neuenschwander, Ulrich W. Suter, Philippe Pretre, Philip Kaatz, and Peter GuenterCite this: Macromolecules 1994, 27, 8, 2181–2186Publication Date (Print):April 1, 1994Publication Histor…
Effect of lanthanide contraction on the structures of the decatungstolanthanoate anions in K3Na4H2[LnW10O36].nH2O (Ln = Pr, Nd, Sm, Gd, Tb, Dy) crystals
Structures of tripotassium tetrasodium dihydrogen decatungstolanthanoate crystals, K 3 Na 4 H 2 [LnW 10 O 36 ].nH 2 O (Ln=Pr, Nd, Dy; n=21-22), have been determined and compared with the structures of their isomorphous crystals with Ln=Sm, Gd and Tb. All six [LnW 10 O 36 ] 9- anions in these isomorphous crystals exhib…
Supramolecular Structures in Solid State AgCN–Cd(CN)2–(4-Picoline) Complexes. An Interwoven Double Network of [Cd{Ag(CN)2}2]n in [trans-Cd(4-Mepy)2{Ag(CN)2}2]·(4-Mepy) and a Linear Chain of [–Cd–NC–Ag(CN)Ag–CN–]n in [Cd(4-Mepy)4{Ag2(CN)3}][Ag(CN)2]
Abstract The title complexes in the compositions 2Ag(CN)·Cd(CN)2·3(4-Mepy) and 3Ag(CN)·Cd(CN)2·4(4-Mepy) crystallize from the same mother solution with the supramolecular structures remarkably different from each other. The former is a clathrate accommodating a guest 4-Mepy in the interwoven double network host. The l…
Stability loss and sensitivity in hollow fiber drawing
Stability of hollow fiber drawing is studied, based on the quasi-one-dimensional equations of thin film dynamics. It is shown that the model isothermal drawing process is unstable when the draw ratio E (that of output to input velocities) exceeds the critical value E*=20.22 when the viscosity force is dominating. Unde…
Structural Studies of Thermoplastic Triblock Copolymer Gels
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructural Studies of Thermoplastic Triblock Copolymer GelsN. Mischenko, K. Reynders, K. Mortensen, R. Scherrenberg, F. Fontaine, R. Graulus, and H. ReynaersCite this: Macromolecules 1994, 27, 8, 2345–2347Publication Date (Print):April 1, 1994Publication History Published on…
Control of polyhydroxyalkanoate synthesis in Azotobacter vinelandii strain UWD
To better understand the reasons for the hyper-accumulation of polyhydroxyalkanoate (PHA) in mutant Azotobacter vinelandii UWD, the kinetic properties of 3-ketothiolase, acetoacetyl-CoA reductase, and β-hydroxybutyrate dehydrogenase were examined. The regulation of the condensation of acetyl-CoA mediated by 3-ketothio…
Creep and Creep Rupture of an Advanced Silicon Nitride Ceramic
Creep and creep rupture behavior of an advanced silicon nitride ceramic were systematically characterized in the temperature range 1150° to 1300°C using uniaxial tensile creep tests. Absence of tertiary creep and the order‐of‐magnitude breaks in both creep rate and rupture lifetime at certain threshold combinations of…
Acid Strength of Heteropolyacids and Its Correlation with Catalytic Activity
Abstract UV spectrophotometry of a Hammett indicator revealed that the acid strength of the Keggin-type heteropolyacids having W as addenda atoms increased as the valency of the central atom increased (Co < B < Si, Ge < P). The catalytic activity for the decomposition of isobutyl propionate in a h…
Superconductivity of quasi-one-dimensional conductors in a high magnetic field
We determine the phase diagram of a quasi-one-dimensional superconductor (weakly coupled chains system with an open Fermi surface) in a magentic field. A field H(0,H,0) along the y direction (perpendicular the direction x of highest conductivity) tends to confine the electronic motion in the z direction. At low temper…
Reexamination of Shock-Tube Measurements of the Rate Coefficient of H + O2 .fwdarw. OH + O
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReexamination of Shock-Tube Measurements of the Rate Coefficient of H + O2 .fwdarw. OH + OC.-L. Yu, M. Frenklach, D. A. Masten, R. K. Hanson, and C. T. BowmanCite this: J. Phys. Chem. 1994, 98, 17, 4770–4771Publication Date (Print):April 1, 1994Publication History Published…
Layer Structures. 2. Influence of Spacers on Chain Packing and Phase Transitions of Poly(ester-imide)s Derived from N-(4-Carboxyphenyl)trimellitimide
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTLayer Structures. 2. Influence of Spacers on Chain Packing and Phase Transitions of Poly(ester-imide)s Derived from N-(4-Carboxyphenyl)trimellitimideHans R. Kricheldorf, Gert Schwarz, Matthias Berghahn, Javier de Abajo, and Jose de la CampaCite this: Macromolecules 1994, 27,…
Chemically reduced plzt ceramics for ultra-high displacement actuators
A new and unique processing method for fabricating stress-biased, monolithic ceramic elements for ultra-high displacement actuators is reported. The technique consists of chemically reducing one surface of a high lead containing piezoelectric or electrostrictive wafer such as PLZT with solid graphite in an oxidizing a…
Deuteration Effects and Solubility Parameter Ordering in Blends of Saturated Hydrocarbon Polymers
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDeuteration Effects and Solubility Parameter Ordering in Blends of Saturated Hydrocarbon PolymersWilliam W. Graessley, Ramanan Krishnamoorti, Nitash P. Balsara, Lewis J. Fetters, David J. Lohse, Donald N. Schulz, and Joseph A. SissanoCite this: Macromolecules 1994, 27, 9, 25…
Frustrated bilayer smectic phase in main-chain polymers with two different spacers
We have studied the structural characteristics of the smectic phases formed by the main-chain type of polymers in which the mesogenic biphenyl moieties are linked by two different odd-numbered aliphatic spacers in a regularly alternate fashion. The first interesting result of this study is that the two different types…