![Loading...](https://link.springer.com/static/c4a417b97a76cc2980e3c25e2271af3129e08bbe/images/pdf-preview/spacer.gif)
-
Article
Effects of simulated microgravity on the alkaline phosphatase activity and intracellular calcium concentration of cultured chondrocytes
The effects of simulated microgravity on matrix mineralization of chondrocytes were examined using cultured chicken embryonic chondrocytes as the model. In four days, there was a time course decrease in alkali...
-
Article
Effects of simulated microgravity on the cell growth and extracellular matrix of cultured chondrocytes
The effects of simulated microgravity on cell growth and extracellular matrix of chondrocytes have been examined by a light microscope and a scanning electron microscope using cultured chicken embryonic chondr...
-
Article
An H2O flare in GGD25
We report the observing results of a short time scale monitoring of the 22 GHz water maser emission in GGD25. A rapid water maser outburst with the time scales of 4 d has been detected, and the variations are ...
-
Article
Polymorphisms of chemokine receptors and its ligand alleles influencing genetic susceptibity to HIV-1 infection in eight ethnic groups in Chinese mainland
Limited genetic information is available concerning the polymorphisms of HIV-1 resistant genes in indigenous Chinese populations. The aim of this study is to identify the allelic frequencies of the chemokine and ...
-
Article
Research on crystal growth and properties of a new nonlinear optical crystal: Bismuth borate BiB3O6
BiB3O6 (BIBO) single crystals with sizes of 44 mm × 24 mm × 10 mm and weight of 24.7 g have been successfully grown by the top-seeded method. In this note, the preparation of seed, the growth of crystal and some ...
-
Article
Direct observation of the clockwise light-driven rotation of F0F1-ATP synthase complex
The purified thermophilic bacterium PS3 F1β10 ×His-tag is inserted into the F0F1-ATP synthases of chromatophores isolated from photosynthetic bacteria Rhodospirillum rubrum. The studies of biochemical properties ...
-
Article
Study on temperature characteristics of organic light-emitting diodes based on tris-(8-hydroxylquinoline)-aluminum
Both single-layer and double-layer organic light-emitting devices based on tris-(8-hydroxylquinoline)-aluminum (Alq3) as emitter are fabricated by thermal vacuum deposition. The electroluminescent characteristics...
-
Article
Influences of fluorine auxochrome in fluorene molecular electroluminescent material on optoelectronic property
The UV-Vis absorption and photoluminescence (PL) spectra of 2,3-bis(9,9-dihexyl-9H-fluoren-2-yl) quinoxaline (Py), 2,3-bis(9,9-dihexyl-9H-fluoren-2-yl)-6,7-difluoroquinoxaline (F2Py) and 2,3-bis(9,9-dihexyl-9H...
-
Article
Polaron-pair-dependent equivalent circuit parameters of organic solar cells based on CuPc and C60
We present the current-voltage characteristics of organic solar cells based on single and double heterojunction of copper phthalocyanine (CuPc) and C60 by introducing a constant J P instea...
-
Article
Determination of the controlled landing trajectory of Chang’E-1 satellite and the coordinate analysis of the landing point on the Moon
Based on the tracking observations of radio ranges and VLBI delays of Chang’E-1 (CE-1) satellite during the controlled landing on the Moon on March 1, 2009, the landing trajectory and the coordinates of the la...
-
Article
Red organic light emitting device with improved performance using a novel fluorescent dye codoped with phosphor-sensitizer
Efficient red organic light-emitting device consisted of a compound fluorescent-phosphor-sensitized emission layer was fabricated. A novel red fluorescent dye, 3-(dicyanomethylene)-5,5-dimethyl-1-(4-dimethylam...
-
Article
Open AccessImprovement of orbit determination for geostationary satellites with VLBI tracking
China’s COMPASS satellite navigation system consists of five or more geostationary (GEO) satellites. The roles of GEO satellites are to improve the regional user’s positioning accuracy and provide the continuo...
-
Article
Open AccessShock wave compression of poled Pb0.99[(Zr0.90Sn0.10)0.96Ti0.04]0.98Nb0.02O3 ceramics: Depoling currents in axial and normal modes
We used a 100-mm diameter gas gun to investigate the output currents due to the sudden depolarization of poled Pb0.99-[(Zr0.90Sn0.10)0.96Ti0.04]0.98Nb0.02O3 ceramics under shock wave compression. We conducted sho...
-
Article
Open AccessPrecise positioning of the Chang’E-3 lunar lander using a kinematic statistical method
A kinematic statistical method is proposed to determine the position for Chang’E-3 (CE-3) lunar lander. This method uses both ranging and VLBI measurements to the lander for a continuous arc, combing with prec...
-
Article
Gas sensors for CO2 detection based on RGO–PEI films at room temperature
In this paper, polyethyleneimine (PEI) and reduced graphene oxide (RGO) were selected as sensing materials for carbon dioxide detection. Two kinds of sensors with different sensitive film structures, i.e., RGO...
-
Article
Detection of 2,4-dinitrotoluene using hydrogen-bond acidic polymer coated SAW sensor
A strong hydrogen-bond acidic (HBA) polymer linear fluoroalcoholic polysiloxane (PLF), synthesized by one-step hydrosilylation, was introduced for 2,4-dinitrotoluene (2,4-DNT) detection using surface acoustic ...