Tomoko Fujiwara、Masatoshi Miyamoto、Yoshiharu Kimura2000-03-23Macromolecules
ADVERTISEMENT RETURN TO ISSUEPREVCommunication to the...Communication to the EditorNEXTCrystallization-Induced Morphological Changes of a Poly(l-lactide)/Poly(oxyethylene) Diblock Copolymer from Sphere to Band via Disk: A Novel Macromolecular Self-Organization Process from Core−Shell Nanoparticles on SurfaceTomoko Fuj…
Hydrogels: synthesis, properties, applicationsAdvanced Polymer Synthesis and Characterizationbiodegradable polymer synthesis and properties
Ken‐ichi Kasuya、Hiroshi Mitomo、M. Nakahara 等 6 位作者2000-03-23Biomacromolecules
A poly[(R)-3-hydroxybutyrate] (P(3HB))-degrading marine bacterium (strain NK-1, JCM10458) was isolated from the Pacific Ocean deep-sea floor (1165 m in depth) in Japan. The organism was a motile and Gram negative, aerobic, and rod-shaped bacterium, and its DNA had a guanine-plus-cytosine content of 57.7 mol%. On the b…
Enzyme Catalysis and Immobilizationbiodegradable polymer synthesis and propertiesMicrobial Metabolic Engineering and Bioproduction
Pernille Harris、Jens-Christian N. Poulsen、Kaj Frank Jensen 等 4 位作者2000-03-23Biochemistry
Orotidine 5'-monophosphate decarboxylase (ODCase) catalyzes the decarboxylation of orotidine 5'-monophosphate, the last step in the de novo synthesis of uridine 5'-monophosphate. ODCase is a very proficient enzyme [Radzicka, A., and Wolfenden, R. (1995) Science 267, 90-93], enhancing the reaction rate by a factor of 1…
Photosynthetic Processes and MechanismsEnzyme Structure and FunctionPorphyrin Metabolism and Disorders
Heléne Magnusson、Eva Malmström、Anders Hult2000-03-23Macromolecules
The structure buildup in hyperbranched polyesters from 2,2-bis(hydroxymethyl)propionic acid (bis-MPA) was studied experimentally. Bis-MPA and its dendritic trimer were both polymerized in bulk using acid catalyst. The fractions of terminal, dendritic, and linear repeating units were monitored by 13 C NMR during the co…
RNA Interference and Gene DeliveryDendrimers and Hyperbranched PolymersSynthesis and properties of polymers
D. C. Johnston、R. K. Kremer、M. Troyer 等 8 位作者2000-03-23arXiv
The magnetic susceptibility chi and specific heat C versus temperature T of the spin-1/2 antiferromagnetic alternating-exchange (J1 and J2) Heisenberg chain are studied for the entire range 0 \leq alpha \leq 1 of the alternation parameter alpha = J2/J1. For the uniform chain (alpha = 1), detailed comparisons of the hi…
Materials ScienceStrongly Correlated Electrons
Reiner Anwander、Iris Nagl、Markus Widenmeyer 等 7 位作者2000-03-23The Journal of Physical Chemistry B
Disilazane reagents of type HN(SiR 1 R 2 2 ) 2 carrying organic substituents R 1,2 = H, Me, Ph, n -Bu, n -Oct, Vin (Vin = vinyl) of varying longitudinal and lateral extension are reacted with high quality MCM-41 samples of different pore sizes, i.e., effective pore diameters of 2.8 and 3.8 nm according to the BJH pore…
Zeolite Catalysis and SynthesisMesoporous Materials and CatalysisCovalent Organic Framework Applications
Myrtil L. Kahn、Jean‐Pascal Sutter、Stéphane Golhen 等 7 位作者2000-03-23OpenAlex
Numerous molecular compounds in which a paramagnetic Ln(III) ion is in interaction with a second spin carrier such as a transition metal ion or an organic radical have been described. However, except for the isotropic Gd(III) ion, very little is known concerning the nature ( ferro - or antiferromagnetic ) and mechanis…
Magnetism in coordination complexesLanthanide and Transition Metal ComplexesElectron Spin Resonance Studies
Luciana Giordano、J. Macareno、L. Song 等 6 位作者2000-03-22Molecules
We describe the preparation and photophysical characterization of two model compounds designed to test a new approach for the quantitative determination of Fluorescence Resonance Energy Transfer (FRET) in biological systems. The method enables modulation of FRET by exploiting the unique reversible spectral properties…
Photochromic and Fluorescence ChemistryPhotoreceptor and optogenetics researchbioluminescence and chemiluminescence research
Michael P. Allen2000-03-22The Journal of Chemical Physics
Computer simulations of a simple model of liquid crystals confined between parallel walls have been used to investigate the properties of nematic wetting films and the planar nematic–isotropic interface. Comparison is made with the theoretical predictions of Onsager’s density-functional theory, obtained by numerical m…
Liquid Crystal Research AdvancementsMaterial Dynamics and PropertiesPhotonic Crystals and Applications
R Chen、P. L. Leung2000-03-22Journal of Physics D Applied Physics
In the applications of thermoluminescence (TL) in dosimetry and archaeological dating, it is usually assumed that the measured TL depends on the total dose applied and it is independent of the dose rate. Thus, calibration of a TL specimen is usually performed at a significantly higher dose rate than that of the dose t…
Luminescence Properties of Advanced MaterialsTerahertz technology and applicationsAdvanced Chemical Sensor Technologies
Hirofumi Takikawa、Miki Yatsuki、Tateki Sakakibara 等 4 位作者2000-03-22Journal of Physics D Applied Physics
Multiwall carbon nanotubes (MWCNTs) were fabricated by a new cathodic vacuum arc method, in which the anode itself was the vacuum chamber and was inert. The cathodic vacuum arc discharge was performed at 0.5 Pa of He and H 2 gas atmospheres using a dc arc current of 100 A. The cathode materials were pure graphite and…
Carbon Nanotubes in CompositesDiamond and Carbon-based Materials ResearchForce Microscopy Techniques and Applications
Suresh K. Bhatia、F Liu、G. Arvind2000-03-22Langmuir
Isotherm hysteresis and pore-blocking effects of trapped molecules on adsorption dynamics is studied here, using the iodine−carbon system in the 300−343 K temperature range. It is found that a portion of the iodine is strongly adsorbed, and does not desorb, even over very long time scales, while the remainder adsorbs…
Metal-Organic Frameworks: Synthesis and ApplicationsMesoporous Materials and CatalysisCovalent Organic Framework Applications
D. Schwahn、Kell Mortensen、Henrich Frielinghaus 等 5 位作者2000-03-22The Journal of Chemical Physics
We have studied thermal composition fluctuations of a ternary symmetric homopolymer/diblock copolymer system of PEE/PDMS/PEE-PDMS [PEE and PDMS being poly(ethyl ethylene) and poly(dimethyl siloxane), respectively] in its disordered state with small angle neutron scattering for concentration Φ of diblocks up to 15%. Th…
Material Dynamics and PropertiesTheoretical and Computational PhysicsBlock Copolymer Self-Assembly
Alexander B. Morgan、Joshua L. Jurs、James M. Tour2000-03-22Journal of Applied Polymer Science
This study describes the syntheses and thermal properties of aromatic boronic acids and their use as flame retardants. The possible flame-retardancy mechanisms are also discussed. The materials were synthesized from aromatic bromides using one of two procedures. The first procedure involved traditional approaches to b…
Synthesis and characterization of novel inorganic/organometallic compoundsFlame retardant materials and propertiesSynthesis and properties of polymers
Limin Huang、Zhengbao Wang、Jinyu Sun 等 7 位作者2000-03-22Journal of the American Chemical Society
ADVERTISEMENT RETURN TO ISSUEPREVCommunicationNEXTFabrication of Ordered Porous Structures by Self-Assembly of Zeolite NanocrystalsLimin Huang, Zhengbao Wang, Jinyu Sun, Lei Miao, Quanzhi Li, Yushan Yan, and Dongyuan ZhaoView Author Information Department of Chemistry, Fudan University Shanghai 200433, P. R. China Dep…
Catalytic Processes in Materials ScienceZeolite Catalysis and SynthesisMesoporous Materials and Catalysis
Arif A. Mamedov、John W. Ostrander、F. G. Aliev 等 4 位作者2000-03-22Langmuir
Hybrid thin films are prepared from 8 to 10 nm Fe 3 O 4 nanoparticles and exfoliated montmorillonite clay by using layer-by-layer assembly on poly(diallyldimethylammonium bromide), PDDA. Distinct stratification of the Fe 3 O 4 /PDDA/clay films is obtained due to the sheetlike structure of the clay particles. This feat…
Conducting polymers and applicationsPolymer Surface Interaction StudiesLayered Double Hydroxides Synthesis and Applications
J. Schumacher、J. C. Martinez、F. Martin 等 7 位作者2000-03-22arXiv
In this work we investigate the influence of the use of YSZ and CeO2/YSZ as insulators for Metal- Ferroelectric-Insulator-Semiconductor (MFIS) structures made with SrBi2Ta2O9 (SBT). We show that by using YSZ only the a-axis oriented Pyrochlore phase could be obtained. On the other hand the use of a CeO2/YSZ double-buf…
Materials Science
G. A. Vliegenthart、H. N. W. Lekkerkerker2000-03-22The Journal of Chemical Physics
We show that whereas the critical point is very sensitive to the range of interaction, the second virial coefficient has a fairly constant value at the critical temperature. This enables us to predict the critical temperature with fair accuracy. We discuss the connection between the second virial coefficient as a pred…
Phase Equilibria and ThermodynamicsMaterial Dynamics and PropertiesCrystallization and Solubility Studies
Zhibin Jin、HW Qin、J R Zhang 等 4 位作者2000-03-21Journal of Physics Condensed Matter
Nanocrystalline ferromagnetic La 0.7 Ca 0.3 MnO 3 perovskites with magnetoresistance effect have been successfully prepared by mechanical alloying. Thermal transformation of the amorphous phase, resulting from ball milling, to perovskite structure was studied by differential scanning calorimetry. Following the law of…
Advanced Thermoelectric Materials and DevicesMagnetic and transport properties of perovskites and related materialsAdvanced Condensed Matter Physics
G. A. Skarja、Kimberly A. Woodhouse2000-03-21Journal of Applied Polymer Science
A series of degradable polyurethanes of variable soft segment chemistry and content were synthesized and characterized. An amino acid-based diester chain extender was used to confer degradability and both polycaprolactone diol (PCL) and polyethylene oxide (PEO) were used as soft segments. In addition, the diisocyanate…
Polymer composites and self-healing