| 1. |
- Shi, Zhen-Qiang, et al.
(författare)
-
Engineering polyethersulfone hollow fiber membrane with improved blood compatibility and antibacterial property
- 2016
-
Ingår i: Colloid and Polymer Science. - : Springer. - 0303-402X .- 1435-1536. ; 294:2, s. 441-453
-
Tidskriftsartikel (refereegranskat)abstract
- Hollow fiber membranes with satisfied blood compatibility and antibacterial property are desired in blood purification. Herein, a series of heparin-like copolymers of poly(methyl methacrylate-vinyl pyrrolidone -sodium styrene sulfonate-sodium acrylate) (poly(MMA-VP-SSNa-SA)) were synthesized by free radical solution polymerization. The mixture was directly blended with polyethersulfone (PES) solution to prepare hollow fiber membranes. The membranes were characterized by Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). Blood compatibility of the hollow fiber membranes was evaluated via protein adsorption, platelet adhesion, clotting time, and hemolysis assay. Besides, Ag nanoparticles were immobilized onto the hollow fiber membranes efficiently by a simple and green method, and the antibacterial property and blood compatibility of the Ag-loaded membranes were then investigated. The results indicated that the approach towards blood compatible and antibacterial hollow fiber membrane is efficient and flexible for the modification for membrane materials.
|
|
| 2. |
- Wang, Zhen, et al.
(författare)
-
Dual-Tunable Structural Colors from Liquid-Infused Aerogels
- 2020
-
Ingår i: Advanced Optical Materials. - : Wiley. - 2162-7568 .- 2195-1071. ; 8:7
-
Tidskriftsartikel (refereegranskat)abstract
- Herein, dual-tunable structural colors generated from liquid-infused, robust silsesquioxane aerogels due to the specific light scattering by the aerogel skeleton in liquids with matching refractive indices, are reported. The colors are tunable by changing the temperature and the composition of the liquid that roots from the coherence between the colors and the refractive index of the infused liquid. The finding provides new insights and tools for constructing structural colors and light management. It also opens applications of stimuli-responsive smart windows, displays, and sensors. Taking advantage of the penetrable light of selected wavelength, the 3D structures of aerogel skeletons are reconstructed by an optical method, which provides a facile alternative approach to characterizing aerogel structure and will be instrumental to the understanding of the relationship between skeleton structure and mechanical property of porous 3D structures.
|
|
| 3. |
- Zhao, Li-Juan, et al.
(författare)
-
Lysine demethylase LSD1 delivered via small extracellular vesicles promotes gastric cancer cell stemness
- 2021
-
Ingår i: EMBO Reports. - : EMBO. - 1469-221X .- 1469-3178. ; 22:8
-
Tidskriftsartikel (refereegranskat)abstract
- Several studies have examined the functions of nucleic acids in small extracellular vesicles (sEVs). However, much less is known about the protein cargos of sEVs and their functions in recipient cells. This study demonstrates the presence of lysine-specific demethylase 1 (LSD1), which is the first identified histone demethylase, in the culture medium of gastric cancer cells. We show that sEVs derived from gastric cancer cells and the plasma of patients with gastric cancer harbor LSD1. The shuttling of LSD1-containing sEVs from donor cells to recipient gastric cancer cells promotes cancer cell stemness by positively regulating the expression of Nanog, OCT4, SOX2, and CD44. Additionally, sEV-delivered LSD1 suppresses oxaliplatin response of recipient cells in vitro and in vivo, whereas LSD1-depleted sEVs do not. Taken together, we demonstrate that LSD1-loaded sEVs can promote stemness and chemoresistance to oxaliplatin. These findings suggest that the LSD1 content of sEV could serve as a biomarker to predict oxaliplatin response in gastric cancer patients.
|
|
| 4. |
|
|
| 5. |
- Hu, Chichun, et al.
(författare)
-
Experimental Study of Dowel Bar Alternatives Based on Similarity Model Test
- 2017
-
Ingår i: Advances in Materials Science and Engineering. - : Hindawi Limited. - 1687-8434 .- 1687-8442.
-
Tidskriftsartikel (refereegranskat)abstract
- In this study, a small-scaled accelerated loading test based on similarity theory and Accelerated Pavement Analyzer was developed to evaluate dowel bars with different materials and cross-sections. Jointed concrete specimen consisting of one dowel was designed as scaled model for the test, and each specimen was subjected to 864 thousand loading cycles. Deflections between jointed slabs were measured with dial indicators, and strains of the dowel bars were monitored with strain gauges. The load transfer efficiency, differential deflection, and dowel-concrete bearing stress for each case were calculated from these measurements. The test results indicated that the effect of the dowel modulus on load transfer efficiency can be characterized based on the similarity model test developed in the study. Moreover, round steel dowel was found to have similar performance to larger FRP dowel, and elliptical dowel can be preferentially considered in practice.
|
|
| 6. |
- Liu, Ruixu, et al.
(författare)
-
Configuration Optimization of Virtual Inertia Considering Spatial Distribution Characteristics of Frequency
- 2024
-
Ingår i: Dianli Xitong Zidonghua/Automation of Electric Power Systems. - : Automation of Electric Power Systems Press. - 1000-1026. ; 48:8, s. 122-130
-
Tidskriftsartikel (refereegranskat)abstract
- The high proportion of power electronic equipment connected to the grid changes the frequency response characteristics of the power system, resulting in significant frequency dynamic heterogeneity of each node, leading to problems such as low system inertia and weak frequency stability. The virtual inertia provided by the power electronic equipment is one of the effective ways to improve frequency stability. In order to improve the frequency response performance of the new power system dominated by renewable energy sources, a configuration optimization method of virtual inertia considering the spatial distribution difference of the system frequency response is proposed. Firstly, based on the frequency divider theory, a system frequency response model reflecting the difference characteristics of the spatial distribution of frequency is constructed. Secondly, in order to quantitatively describe the influence of inertia distribution on nodal frequency response, the deviation indices of nodal inertia and nodal kinetic energy are proposed. Then, considering the spatial distribution characteristics of frequency, aiming at optimizing the energy imbalance of each node after the disturbance, a configuration optimization model of virtual inertia is established. Finally, the validity of the nodal inertia index and the improvement effect of the proposed virtual inertia configuration method on the nodal frequency stability of the system are verified by simulations.
|
|
| 7. |
- Qian, Zhenchao, et al.
(författare)
-
Triboelectric nanogenerators made of polybenzazole aerogels as fire-resistant negative tribo-materials
- 2019
-
Ingår i: Nano Energy. - : ELSEVIER. - 2211-2855 .- 2211-3282. ; 64
-
Tidskriftsartikel (refereegranskat)abstract
- Flame-retardant negative tribo-materials are desirable for triboelectric nanogenerators (TENGs) using under harsh conditions, such as thermal power fields and aerospace. The existed negative tribo-materials are mainly polymeric materials, and their high-temperature stability and fire resistance still need to be improved. Herein, poly(p-phenylene benzobisoxazole) aerogels (PBOAs) were used as the negative tribo-materials in TENGs. Because of the large porosity and high specific surface area, the resultant TENGs exhibit maximum open circuit voltage, short-circuit current density and charge density of 40 V, 2.9 mA m(-2) and 72 mu C m(-2), respectively. The device can light 36 LED bulbs and charge the capacitor to 10 V within 250 s. The device can also be used as a self-powered, highly sensitive sensor for monitoring human motion and even slight collisions with an impulse of only 3 mu N s. PBOA has been paired with aluminum foil to fabricate PBOA/Al TENGs, which exhibit V on of 32 V(, )J(SC) of 1.2 mA M-2 and charge density of 32 mu C M-2 at a temperature as high as 350 degrees C, demonstrating the possibility of application of TENGs in high-temperature environments.
|
|
