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Permeability of Concrete with Recycled Concrete Aggregate and Pozzolanic Materials under Stress.
The research reported herein studied the permeability of concrete containing recycled-concrete aggregate (RA), superfine phosphorous slag (PHS), and ground granulated blast-furnace slag (GGBS) with and without stress. Test results showed that the chloride diffusion coefficient of RA concrete (RAC) without external loads decreased with time, and the permeability of RAC is much lower than that of the reference concrete due to the on-going hydration and the pozzolanic reaction provided by the PHS and GGBS additives in the RAC mixture. The permeability of chloride under flexural load is much more sensitive than that under compressive load due to the differences in porosity and cracking pattern. At low compressive stress levels, the permeability of chloride decreased by the closing of pores and microcracks within RAC specimens. However, in a relatively short time the chloride diffusion coefficient and the chloride content increased rapidly with the increase of compressive stress when it exceeded a threshold stress level of approximate 35% of the ultimate compressive strength. Under flexural stress, the chloride transport capability increased with the increase of stress level and time. At high compressive and flexural stress levels, creep had a significant effect on the permeability of chloride in the RAC specimens due to the damage from the nucleation and propagation of microcracks over time. It is apparent that mortar cracking has more of a significant effect on the chloride transport in concrete than cracking in the interfacial transition zone (ITZ)
Match Probability Statistics and Gamma Ray Burst Recurrences in the BATSE Catalog
We develop match probability statistics to test the recurrences of gamma ray
bursts in the BATSE catalog 1B and 2B. We do not find a signal of repetitions
at the match level of 1.e-3.Comment: 4 pages, LaTeX, two macros included (kluwer.sty, spacekap.sty) To
appear in the proceedings of the Eslab29 symposium, ``gamma ray bursts:
toward the source
Spectroscopic characterization of 1.3Β΅m GaInNAs quantum-well structures grown by metal-organic vapor phase epitaxy
We report optical studies of high-quality 1.3βΞΌm strain-compensated GaInNAs/GaAs single-quantum-well structures grown by metalorganic vapor phase epitaxy. Photoluminescence excitation (PLE) spectroscopy shows clearly the electronic structure of the two-dimensional quantum well. The transition energies between quantized states of the electrons and holes are in agreement with theoretical calculations based on the band anti-crossing model in which the localized N states interact with the extended states in the conduction band. We also investigated the polarization properties of the luminescence by polarized edge-emission measurements. Luminescence bands with different polarization characters arising from the electron to heavy-hole and light-hole transitions, respectively, have been identified and verify the transition assignment observed in the PLE spectrum
Crystal Nucleation by Laser-Induced Cavitation\ud
High-speed and high-resolution photography have been used to investigate the relationship between creation, expansion, and collapse of a vapor cavity induced by a 6 ns laser pulse and the subsequent nucleation of crystals. A thin layer of supersaturated aqueous solutions of (NH4)2SO4 and KMnO4 was confined between two glass plates with a separation of 50 and 100 ΞΌm. The expansion and collapse of the laser-induced vapor bubble occurred over a total time scale of 200 ΞΌs, while the first identifiable crystal appears one second after the laser pulse. Crystals were observed to form on a ring with a diameter of 70 ΞΌm centered in the focal point of the laser. The ring is preceded by an optical disturbance observed through the cavity around 30β50 ΞΌs after the laser pulse and vapor cavity formation. This ring-shaped optical disturbance originates from changes in refractive index induced by crystal nuclei formation. The formation of the nuclei most probably coincides with the formation of the bubble, when the rate of evaporation and the supersaturation are at their maxima. Apparently, it takes the nuclei around 30β50 ΞΌs to grow to a particle size with a visible optical disturbanc
The renormalization transformation of two-type branching models
Article / Letter to editorMathematisch Instituu
Superconducting Order Parameter in Bi-Layer Cuprates: Occurrence of Phase Shifts in Corner Junctions
We study the order parameter symmetry in bi-layer cuprates such as YBaCuO,
where interesting phase shifts have been observed in Josephson junctions.
Taking models which represent the measured spin fluctuation spectra of this
cuprate, as well as more general models of Coulomb correlation effects, we
classify the allowed symmetries and determine their associated physical
properties. phase shifts are shown to be a general consequence of
repulsive interactions, independent of whether a magnetic mechanism is
operative. While it is known to occur in d-states, this behavior can also be
associated with (orthorhombic) s-symmetry when the two sub-band gaps have
opposite phase. Implications for the magnitude of are discussed.Comment: 5 pages, RevTeX 3.0, 9 figures (available upon request
Phonon thermal conductivity in doped : Relevant scattering mechanisms
Results of in-plane and out-of-plane thermal conductivity measurements on
() single crystals are
presented. The most characteristic features of the temperature dependence are a
pronounced phonon peak at low temperatures and a steplike anomaly at ,
i.e., at the transition to the low temperature tetragonal phase (LTT-phase),
which gradually decrease with increasing Sr-content. Comparison of these
findings with the thermal conductivity of and clearly reveals that in the most effective
mechanism for phonon scattering is impurity-scattering (dopants), as well as
scattering by soft phonons that are associated with the lattice instability in
the low temperature orthorhombic phase (LTO-phase). There is no evidence that
stripe correlations play a major role in suppressing the phonon peak in the
thermal conductivity of .Comment: 7 pages, 4 figure
Paclitaxel-octreotide conjugates inhibit growth of human non-small cell lung cancer cells in vitro
Aim: To evaluate the effects of paclitaxel-octreotide conjugates on the growth of cultured non-small cell lung cancer cells. Methods: RT-PCR was performed to detect mRNA for the subtypes of the human somatostatin receptor (SSTR) using specific primers. MTT-based cytotoxicity assay was used to evaluate the cell viability after treatment with paclitaxel and the conjugates. Cell cycle perturbations were determined using a Fluorescence-Activated Cell Sorter. Results: Non-small cell lung cancer A549 and Calu-6 cells expressed mRNA for SSTR2 and SSTR5. Paclitaxel and the conjugates effectively inhibited the growth of A549 and Calu-6 cells in a concentration- and time-dependent manner. In SSTR-negative fibroblasts, the conjugates were less cytotoxic than paclitaxel. The conjugates and paclitaxel could induce the increase of G2/M phase ratio in A549 cells. Conclusion: The paclitaxel-octreotide conjugates can be used as selective-targeted chemotherapeutic agents for treating non-small cell lung cancer.Π¦Π΅Π»Ρ: ΠΎΡΠ΅Π½ΠΈΡΡ ΡΡΡΠ΅ΠΊΡ ΠΊΠΎΠ½ΡΡΠ³Π°ΡΠΎΠ² ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π»Π°-ΠΎΠΊΡΡΠ΅ΠΎΡΠΈΠ΄Π° Π½Π° ΡΠΎΡΡ ΠΊΡΠ»ΡΡΠΈΠ²ΠΈΡΠΎΠ²Π°Π½Π½ΡΡ
ΠΊΠ»Π΅ΡΠΎΠΊ Π½Π΅ΠΌΠ΅Π»ΠΊΠΎΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ°
Π»Π΅Π³ΠΊΠΎΠ³ΠΎ ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ°. ΠΠ΅ΡΠΎΠ΄Ρ: Π΄Π»Ρ ΠΎΠΏΡΠ΅Π΄Π΅Π»Π΅Π½ΠΈΡ ΠΌΠ ΠΠ ΠΏΠΎΠ΄ΡΠΈΠΏΠΎΠ² ΡΠ΅ΡΠ΅ΠΏΡΠΎΡΠ° ΡΠΎΠΌΠ°ΡΠΎΡΡΠ°ΡΠΈΠ½Π° ΡΠ΅Π»ΠΎΠ²Π΅ΠΊΠ° (SSTR) ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΠΈ ΠT-ΠΠ¦Π .
ΠΠ½Π°Π»ΠΈΠ· ΡΠΈΡΠΎΡΠΎΠΊΡΠΈΡΠ½ΠΎΡΡΠΈ Π² ΠΠ’Π’-ΡΠ΅ΡΡΠ΅ ΠΏΡΠΈΠΌΠ΅Π½ΡΠ»ΠΈ Π΄Π»Ρ ΠΎΡΠ΅Π½ΠΊΠΈ Π²ΡΠΆΠΈΠ²Π°Π΅ΠΌΠΎΡΡΠΈ ΠΊΠ»Π΅ΡΠΎΠΊ ΠΏΠΎΡΠ»Π΅ ΠΈΡ
ΠΈΠ½ΠΊΡΠ±Π°ΡΠΈΠΈ Ρ ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π»ΠΎΠΌ
ΠΈ ΠΊΠΎΠ½ΡΡΠ³Π°ΡΠ°ΠΌΠΈ. ΠΠ°ΡΡΡΠ΅Π½ΠΈΡ ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΈΠΊΠ»Π° ΠΎΠΏΡΠ΅Π΄Π΅Π»ΡΠ»ΠΈ Ρ ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΠ΅ΠΌ FACS β ΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠΎΡΡΠ΅ΡΠ°. Π Π΅Π·ΡΠ»ΡΡΠ°ΡΡ:
ΡΡΡΠ°Π½ΠΎΠ²Π»Π΅Π½ΠΎ, ΡΡΠΎ ΠΊΠ»Π΅ΡΠΎΡΠ½ΡΠ΅ Π»ΠΈΠ½ΠΈΠΈ Π½Π΅ΠΌΠ΅Π»ΠΊΠΎΠΊΠ»Π΅ΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ°ΠΊΠ° Π»Π΅Π³ΠΊΠΎΠ³ΠΎ A549 ΠΈ Calu-6 ΡΠΊΡΠΏΡΠ΅ΡΡΠΈΡΡΡΡ SSTR2 ΠΈ SSTR5 ΠΌΠ ΠΠ.
ΠΡΠΌΠ΅ΡΠ΅Π½ΠΎ ΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΠ΅ Π΄ΠΎΠ·ΠΎ- ΠΈ Π²ΡΠ΅ΠΌΡΠ·Π°Π²ΠΈΡΠΈΠΌΠΎΠ΅ ΡΠ³Π½Π΅ΡΠ΅Π½ΠΈΠ΅ ΡΠΎΡΡΠ° ΠΊΠ»Π΅ΡΠΎΠΊ A549 ΠΈ Calu-6 ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π»ΠΎΠΌ ΠΈ ΠΊΠΎΠ½ΡΡΠ³Π°ΡΠ°ΠΌΠΈ.
ΠΠ»Ρ SSTR-Π½Π΅Π³Π°ΡΠΈΠ²Π½ΡΡ
ΡΠΈΠ±ΡΠΎΠ±Π»Π°ΡΡΠΎΠ² ΠΊΠΎΠ½ΡΡΠ³Π°ΡΡ ΠΌΠ΅Π½Π΅Π΅ ΡΠΈΡΠΎΡΠΎΠΊΡΠΈΡΠ½Ρ, ΡΠ΅ΠΌ ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π». ΠΠΎΠ½ΡΡΠ³Π°ΡΡ ΠΈ ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π» ΠΌΠΎΠ³ΡΡ
ΠΈΠ½Π΄ΡΡΠΈΡΠΎΠ²Π°ΡΡ ΠΏΠΎΠ²ΡΡΠ΅Π½ΠΈΠ΅ ΡΠΎΠΎΡΠ½ΠΎΡΠ΅Π½ΠΈΡ ΡΠ°Π· G2
/M Π² ΠΊΠ»Π΅ΡΠΊΠ°Ρ
A549. ΠΡΠ²ΠΎΠ΄Ρ: ΠΊΠΎΠ½ΡΡΠ³Π°ΡΡ ΠΏΠ°ΠΊΠ»ΠΈΡΠ°ΠΊΡΠ΅Π»-ΠΎΠΊΡΡΠ΅ΠΎΡΠΈΠ΄Π° ΠΌΠΎΠ³ΡΡ Π±ΡΡΡ
ΠΈΡΠΏΠΎΠ»ΡΠ·ΠΎΠ²Π°Π½Ρ ΠΊΠ°ΠΊ ΡΠ΅Π»Π΅ΠΊΡΠΈΠ²Π½ΡΠ΅ Ρ
ΠΈΠΌΠΈΠΎΡΠ΅ΡΠ°ΠΏΠ΅Π²ΡΠΈΡΠ΅ΡΠΊΠΈΠ΅ Π°Π³Π΅Π½ΡΡ Π΄Π»Ρ Π²ΠΎΠ·Π΄Π΅ΠΉΡΡΠ²ΠΈΡ Π½Π° Π½Π΅ΠΌΠ΅Π»ΠΊΠΎΠΊΠ»Π΅ΡΠΎΡΠ½ΡΠΉ ΡΠ°ΠΊ Π»Π΅Π³ΠΊΠΎΠ³ΠΎ
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