An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.
The antibiotic adsorbability and economic performance of modified semi-carbonized fiber (SF) were investigated by using 100% chitosan (CS) to modify SF (prepared by cotton) for preparing CS-modified SF (CS-SF).Then, different ratios (0%, 10%, 20%, 50%, 100%, and 200%) of sodium alginate (SA) were used to modify 100CS-SF for preparing SA and CS-modified SF (SA/CS-SF).Batch method was used to investigate the adsorption characteristic of chlortetracycline (CTC), tetracycline (TC), and oxytetracycline (OTC) on different SA/CS-SFs.The effects of temperature, pH, and ionic strength on antibiotic adsorption were compared, and the economic performance of different SA/CS-SFs was analyzed.Results showed that (1) the Langmuir model is suitable for describing the adsorption process of antibiotics by different SA/CS-SFs.The maximum adsorption amount (q m ) of different SA/CS-SFs for CTC, TC, and OTC were 11.17-36.36,6.14-26.11,and 9.90-32.87mmol/kg, respectively, ranking in the order of CTC > OTC > TC. (2) The adsorption antibiotics by different SA/CS-SFs conformed to the pseudo-first-order kinetics equation.Antibiotic adsorption on different SA/CS-SFs increased with the increase in temperature, and the adsorption was a spontaneous, endothermic, and entropy-increasing process.(3) In the pH range of 3-9 and ionic strength range of 0.01-0.2mol/L, the adsorption amount of antibiotics on different SA/CS-SFs all increased first and then decreased with increasing pH and ionic strength, reaching the maximum value at pH = 5 and ionic strength of 0.1 mol/L, respectively.(4) The economy (q m /price) of different SA/CS-SFs for antibiotic adsorption ranged from 7.18 to 22.91 mg/¥, and 100SA/CS-SF showed the highest economy.Compared with biochar and modified biochar, 100SA/CS-SF had higher economy in antibiotic adsorption.
In-stent restenosis (ISR) and its associated inflammation remains a significant concern for long-term patient outcomes following stent implantation in percutaneous coronary intervention (PCI). The problem is intricately associated with endothelial injury, excessive endothelialization, hyperproliferation of smooth muscle cells, and the infiltration of inflammatory molecules. However, commonly employed imaging techniques encounter challenges in simultaneously acquiring both vascular structural information and functional data related to inflammation. Here, we presented a novel Tri modality intravascular imaging system capable of simultaneous optical coherence tomography (OCT), near-infrared fluorescence (NIRF), ultrasound (US) imaging, and fabricated the OCT-NIRF-US catheter which outer diameter is 0.75 mm, aiming to provide a more comprehensive diagnostic tool for ISR and its associated inflammation. Experiments were conducted on atherosclerotic rabbits implanted with a scaffold, divided into two groups (n=3 each group) for assessment on the first and twenty-eighth day, respectively. Primary results demonstrated that the integrated OCT-NIRF-US intravascular system enables complementary structural imaging and functional imaging of inflammation. The system presents the potential to offer a more accurate assessment, providing with valuable insights into the ISR processing and assisting in the development of more precise clinical strategies.
The controlled dissolution of microdroplets on a supporting substrate is an effective approach that can be used to tune the assembled microstructure of basic units suspended within the droplet. In this work, we studied the self-assembly of two-dimensional graphene oxide (GO) nanosheets driven by the dissolution of a microdroplet situated at the interface between a solid substrate and the surrounding liquid phase. We found that although uniform microstructures form at the liquid–liquid interface of the droplets, the contact between the droplet and the substrate can give rise to a variety of different morphologies near the base of the droplet. In particular, pinning effects at the boundary of the dissolving droplet on the substrate lead to non-spherical GO assemblies. The results in this work demonstrate the possibility that tailored three-dimensional architectures of nanosheets assembled in a dissolving droplet may be achieved through control of the wetting properties of the droplet on the supporting substrate.
Abstract Plastic products have brought great convenience to people's lives, but microplastics are formed when waste plastic products are discharged and undergo weathering and degradation processes. Microplastics can act as carriers of pollutants such as heavy metals through adsorption and desorption, thus threatening the health of living organisms. In this study, typical microplastics Polystyrene (PS) and Polylactic acid (PLA) were targeted to investigate the adsorption and desorption characteristics of heavy metal nickel before and after freeze-thaw cyclic aging, alternating dry and wet aging, and alkali aging. After three kinds of aging, the specific surface area, pore size, and crystallinity of the two microplastics increased, and oxygen-containing functional groups appeared on the surface of the microplastics. Adsorption experiments demonstrated that the kinetics of nickel adsorption by microplastics was more compatible with the proposed second-order model and the adsorption isotherms were more consistent with the Langmuir model. The adsorption capacity after aging was greater than that of the original microplastics, and the adsorption capacity was alkali aging > alternating wet and dry aging > freeze-thaw cycle aging. The adsorption capacity of PLA was greater than that of PS. Alkali aging resulted in the highest amount and rate of nickel desorption from the microplastics. The results of freeze-thaw cycle aging and alternating wet and dry aging did not differ much. It provides a basis for studying the aging process of microplastics and its potential impact on the adsorption and desorption of heavy metals in the environment.
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