On the basis of the method used by Reinsch and Solovyeva, the aluminum based MOF material CAU-10-H (CAU stand for Christian-Albrechts-University) was synthesized by multiplying the amount of aluminum ...sulfate octahydrate and isophthalic acid by 10 times. CAU-10-H (b) is obtained after washing. In order to improve the water vapor adsorption performance of pure CAU-10-H (b), lithium chloride (LiCl) solution was compounded with CAU-10-H (b) by impregnation method to obtain a composite adsorbent CAU-10-H (L) and its adsorption characteristics were studied. The results showed that the composite adsorbent showed good adsorption and desorption performance under test conditions. Among them, the equilibrium adsorption capacity of the composite adsorbent with 33.1% LiCl content is 0.5007 g/g after 30 cycles, which is about 1.675 times of the adsorption capacity of pure CAU-10-H (b) under the same conditions. This shows the potential of the composite adsorbent to be used in the air-water extraction system.
In this paper, aluminum based MOF material CAU-10-H Al (OH) (m-BDC) 2, CAU stand for Christian Albrechts University was synthesized. The performance test proves the performance advantage of CAU-10-H (b). In order to improve the adsorption performance of the adsorbent, the composite adsorbent CAU-10-H (L) was synthesized by impregnation. The composite adsorbent showed good desorption performance. This demonstrates the potential of the composite adsorbent for use in air-water extraction systems. Display omitted
•Aluminum based MOF: CAU-10-H (CAU stand for Christian-Albrechts-University) was prepared by solvothermal synthesis using aluminum sulfate octahydrate and isophthalic acid as raw materials.•The sample of CAU-10-H after washing is named CAU-10-H (b). The microstructure characterization and open adsorption performance tests were done for CAU-10-H(b).•In order to improve the water vapor adsorption performance of CAU-10-H (b), a composite adsorbent CAU-10-H (L) was synthesized by impregnating CAU-10-H (b) with lithium chloride (LiCl) solution.•The water vapor adsorption capacity of the composite adsorbent is higher than that of CAU-10-H (b). The equilibrium adsorption capacity of the composite adsorbent with a mass fraction of 33.1% LiCl is about 1.675 times that of CAU-10-H (b).•The composite adsorbent has good desorption performance, high desorption rate, low desorption temperature, and can reduce energy consumption in practical application.
•A new method for preparing Zn and its alloys has been devised.•The relationship between Zn and CuZn4 phase is -1–120 ε // 01–11 Zn.•Zn-2Cu-0.1Ti alloy has high mechanical properties and slow ...degradation rate.•Zn-2Cu-0.1Ti alloy has excellent osteogenesis properties.
Bioresorbable implants are intended to be biocompatible, mechanically stable, and to corrode gradually in response to an appropriate host response. In this work, a Zn-2Cu-0.1Ti (ZCT) alloy was fabricated by a combination of casting and hot-rolling. X-ray diffraction analysis revealed the presence of both TiZn16 phase and a CuZn4 phase in the alloy. ZCT showed an extraordinary increase in yield strength compared with the unalloyed Zn to 248 MPa (from 100 MPa) and a similar elongation to failure (33–34%). The alloy also possesses a relatively low corrosion rate when immersed in simulated body fluid. The 50 % extract of ZCT alloy exhibits excellent biocompatibility for MC3T3-E1 cells. These results indicate that the ZCT alloy has potential for clinical applications.
is characterized by its ability to incompletely oxidize carbohydrates and alcohols. The high yields of its oxidation products and complete secretion into the medium make it important for industrial ...use. We report the finished genome sequence of
H24, an industrial strain with high l-sorbose productivity.
•A crack-free LPBFed Fe-18 mn alloy is fabricated using pre-alloyed powders.•The exceptional work-hardening rate (8500 MPa) of Fe-Mn alloys is achieved by additive manufacturing and subsequent heat ...treatment.•Deformation mechanisms are illustrated and discussed in details.
Laser-powder-bed-fusion (LPBF) fabricated Fe-Mn biodegradable alloys provide an attractive prospect for orthopedic applications due to their good tensile strength and high degradation rate. Nevertheless, the ε-martensite and heterogeneous microstructures produced by the LPBF processing often lead to premature failure of alloys. Herein, we report a LPBFed multiphase Fe-18Mn alloy (γ-austenite, ε-martensite, and α-ferrite) fabricated from pre-alloyed powders. After annealing at 650 °C, the alloy with a uniform microstructure displays a high 1 GPa tensile strength, a good fracture elongation of 16 %, and an extremely high work-hardening rate of 8500 MPa. The work-hardening rate is higher than that reported in most Fe-Mn steels and Fe-based high entropy alloys. The grain size of a few hundred nanometers provided the excess Gibbs free energy, resulting in an increase in the stacking fault energy (SFE) to 23.9 mJ/m2. The multiple deformation mechanisms, i.e., SFs, the martensitic transformation (γ → ε → α') and nano-deformation twins (DTs), were sequentially activated. We elucidate such unique work-hardening capability, originating from the interaction between the DTs, SFs and transformed martensite. Besides a high-density of dislocations were accumulated between parallel planar defects, the cooperative deformation of the soft and hard phases provided continuous hardening. Our findings highlight the exceptional work-hardening capability of additively-manufactured Fe-Mn alloys achieved by a multiphase material exhibiting multiple deformation mechanisms. The work also provides a straightforward approach for the development of stable-implanted Fe-based bone substitutes.
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Ti and Ti alloys have charming comprehensive properties (high specific strength, strong corrosion resistance, and excellent biocompatibility) that make them the ideal choice in orthopedic and dental ...applications, especially in the particular fabrication of orthopedic and dental implants. However, these alloys present some shortcomings, specifically elastic modulus, wear, corrosion, and biological performance. Beta-titanium (β-Ti) alloys have been studied as low elastic modulus and low toxic or non-toxic elements. The present work summarizes the improvements of the properties systematically (elastic modulus, hardness, wear resistance, corrosion resistance, antibacterial property, and bone regeneration) for β-Ti alloys via surface modification to address these shortcomings. Additionally, the shortcomings and prospects of the present research are put forward. β-Ti alloys have potential regarding implants in biomedical fields.
Inadequate wear and corrosion resistance limit the use of the Sc- and Zr-modified Al-Mg alloys. In this study, X-ray diffraction was employed to determine the phases present in an AlMgScZrMn alloy ...fabricated by laser powder bed fusion (L-PBF) at volumetric energy densities (VEDs) from 52 to 102 J/mm3. Microstructural characterization was performed using a combination of electron backscattered diffraction analysis and optical microscopy. The corrosion resistance was determined using electrochemical measurements in a 3.5 wt% NaCl solution. The hardness and the Young's modulus were determined from nanoindentation tests. The wear performance was determined against SiC balls. It was found that the sample fabricated with VEDs of 67 J/mm3 exhibited the best wear resistance. Higher hardness and finer grain size help to improve the wear resistance of AlMgScZrMn alloys. The increase in large angle grain boundaries leads to higher corrosion susceptibility, resulting in faster corrosion rates. This work provides a basis to enhance the service stability of AlMgScZrMn alloys.
•High density AlMgScZrMn components were successfully fabricated by L-PBF under different VEDs ranges.•The addition of Zr achieves an effective grain refinement for the primary Al alloy.•The increase in HAGBs leads to higher corrosion susceptibility, resulting in faster corrosion rates.•The AlMgScZrMn fabricated with 67 J/mm3 presented the highest nano hardness and the lowest wear rate.
Magnesium (Mg) and its alloys have similar densities and elastic moduli to natural bone, making them an excellent choice for orthopedic implants. However, Mg alloys are prone to electrochemical ...corrosion, which often leads to implant failure and hinders the further development of Mg alloys due to bacterial infection around the implant. This work aims to enhance the corrosion resistance of Mg alloys, and provide theoretical guidance for solving the problem that Mg-based orthopedic implants are susceptible to bacterial infection and, thus, implant failure. In order to solve the corrosion problem, the Mg alloy AZ91D was used as the substrate, and a compact and uniform MgAlCu-layered double hydroxide (Mg(Cu)-LDH) was prepared on its surface using a hydrothermal method. The Mg(Cu)-LDH provides a barrier between the AZ91D and corrosive liquid, which effectively protects the Mg substrate from being corroded. The Mg(Cu)-LDH shows great cell viability for MC3T3-E1 cells. The Cu2+ and Mg2+ in the coating also endow the Mg(Cu)-LDH/AZ91D with antibacterial properties, showing strong antibacterial effects on both E. coli and S. aureus with antibacterial rates over 85%. Finally, in vivo results indicated that a LDH-coated implant had no systemic effects on the hearts, livers, spleens, lungs or kidneys. It was shown that 4 weeks after surgery the ratio of bone volume to tissue volume (BV/TV) of the LDH implant was 24%, which was 1.7 times that observed for AZ91D.
Gluconobacter oxydans
is characterized by its ability to incompletely oxidize carbohydrates and alcohols. The high yields of its oxidation products and complete secretion into the medium make it ...important for industrial use. We report the finished genome sequence of
Gluconobacter oxydans
H24, an industrial strain with high
l
-sorbose productivity.
Jumping Through Hoops is a collection of nine intense and dramatic stories that sheds new light on the experiences of Chinese women during the Second World War. Originally published in Chinese in ...1945, as part of Xie Bingying's classic anthology Nu zuojia
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