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Supercritical Fluid Media in Challenges of Substance and Material Dispersion

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Journal of Thermal Science 2019年第3期28卷 519-546页

作者： KHAIRUTDINOV Vener GUMEROV Farid KHABRIEV Ilnar Federal State Budgetary educational Institution of higher education Kazan National Research technological University

The paper deals with the problem of material dispersion using supercritical fluid media. At the same time, emphasis is made on modifications(SAS, GAS, SEDS and ASES) of the supercritical fluid anti-solvent method of dispersion. The results of SAS method implementation for dispersion of pure polycarbonate and polycarbonate doped with "CdSe/CdS-core/shell" quantum dots(carried out in the pressure range of 8.0-25.0 MPa at temperatures of 313.15 K and 358.15 K) are submitted. The range of the operating parameters has been established through the example of pure polycarbonate dispersion, which provides the production of nanoparticles with the size range of 10-100 nm. Encapsulation of Cd Se/Cd S quantum dots into polycarbonate using the SAS method has no effect on optical properties of the encapsulated quantum dots. The results of paracetamol dispersion using the SEDS method are presented. The effect of operating conditions of the paracetamol dispersion process on morphology of the obtained product is described. Co-dispersion of ethylene–vinyl acetate copolymers and low-density polyethylene mixtures by SEDS method has been carried out under pressures of 8.0-25.0 MPa at temperatures of 313 K, 323 K, and 333 K. The comparison of melting and crystallization between the resulting copolymer mixtures and mixtures with the same composition obtained by mixing in the liquid melt, has shown that implementation of SEDS results in an increase of crystallinity degree of the polymer mixtures.

关键词： supercritical fluid media supercritical fluid anti-solvent method dispersion polycarbonate paracetamol ethylene-vinyl acetate copolymers

Rapid and scalable preparation of highly quaternized polymer networks to achieve efficient simultaneous adsorption of iodide and pertechnetate

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Science China Chemistry 2025年第1期 337-349页

作者： Meiyun Xu Song Gu Fulong Chen Zhe Zhao Peng Liu Daoben Hua State Key Laboratory of Radiation Medicine and Protection School of Radiological and Interdisciplinary Sciences (RAD-X) Collaborative Innovation Center of Radiological Medicine of Jiangsu Higher Education Institutions Soochow University

The efficient separation of fission products,such as TcO4-and I-,holds strategic significance for the management of radioactive wastes and environmental *** this study,we propose an ultrafast strategy for scalable preparation of a highly quaternized organic network to facilitate efficient and synchronous separation of iodide and *** network can be prepared within a few minutes at room temperature,using polyethylenimine and 1,2,4,5-tetrakis（bromomethyl）benzene as building *** chlorine replacement,the network,abundantly decorated with quaternary ammonium groups （Cl@QPN）,exhibits an ultrahigh positive charge density of 7.6 mmol/*** enables the rapid and efficient enrichment of target anions through strong electrostatic Coulomb *** a result,Cl@QPN exhibits significantly higher adsorption rate constants of 0.830 g/（mg min） for ReO4-（a nonradioactive surrogate of TcO4-） and 0.677 g/（mg min） for I-compared to other ***,it possesses high adsorption capacities,reaching 1,681 mg/g for ReO4-and 917.4 mg/g for I-.Cl@QPN also demonstrates good selectivity towards target ions and shows efficient adsorption for99TcO4-.Additionally,Cl@QPN exhibits high dynamic processing capacities,handling up to 3,100 and 7,400 kg of simulated streams per kilogram of material for I-and ReO4-,respectively.

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Cell size: a key determinant of meristematic potential in plant protoplasts

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aBIOTECH 2021年第1期2卷 96-104页

作者： Ipsita Pujari Abitha Thomas Padmalatha SRai Kapaettu Satyamoorthy Vidhu Sankar Babu Department of Plant Sciences Manipal School of Life SciencesManipal Academy of Higher EducationManipalKarnataka 576104India Department of Biotechnology Manipal School of Life SciencesManipal Academy of Higher EducationManipalKarnatakaIndia Department of Cell and Molecular Biology Manipal School of Life SciencesManipal Academy of Higher EducationManipalKarnatakaIndia

Metabolic pathway reconstruction and gene edits for native natural product synthesis in single plant cells are considered to be less complicated when compared to the production of non-native *** an efficient eukaryotic system,plants encompass suitable post-translational ***,slow cell division rate and heterogeneous nature is an impediment for consistent product retrieval from plant *** cell synchrony can be attained in cultures developed in *** plant protoplasts capable of division,can potentially enhance the unimpaired yield of target bioactives,similar to microbes and unicellular *** from yeast experiments suggests that‘critical cell size’and division rates for enhancement machinery,primarily depend on culture conditions and nutrient *** cell size control mechanisms in Arabidopsis shoot apical meristem is analogous to yeast notably,fission *** protoplasts isolated from plants are subjected to cell size studies and cell cycle progression in culture,it will answer the underlying molecular mechanisms such as,unicellular to multicellular transition states,longevity,senescence,‘cell-size resetting’during organogenesis,and adaptation to external cues.

关键词： Cell cycle Cell size CRISPR Plant protoplasts TOR signalling

Prussian Blue Analogue‑Templated Nanocomposites for Alkali‑Ion Batteries:Progress and Perspective

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Nano-Micro Letters 2025年第1期17卷 216-261页

作者： Jian‑En Zhou Yilin Li Xiaoming Lin Jiaye Ye Key Laboratory of Theoretical Chemistry of Environment Ministry of EducationSchool of ChemistrySouth China Normal UniversityGuangzhou 510006People’s Republic of China school of Chemistry and Physics Faculty of ScienceQueensland University of Technology2 George StreetBrisbaneQLD 4000Australia Centre for Materials Science Queensland University of Technology2 George StreetBrisbaneQLD 4000Australia

Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium *** enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal *** review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these *** on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.

关键词： Prussian blue analogues Self-sacrificial template Lithium-ion batteries Sodium-ion batteries Potassium-ion batteries

Preparation and evaluation of PEGylated phospholipid membrane coated layered double hydroxide nanoparticles

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Asian Journal of Pharmaceutical Sciences 2016年第3期11卷 396-403页

作者： Mina Yan Zhaoguo Zhang Shengmiao Cui Xuefei Zhang Weijing Chu Ming Lei Ke Zeng Yunhui Liao Yihui Deng Chunshun Zhao school of Pharmacy Shenyang Pharmaceutical University school of Pharmaceutical Sciences Sun Yat-sen University Guangzhou Higher Education Mega Center Guangdong Pharmaceutical University Guangzhou Higher Education Mega Center

The aim of the present study was to develop layered double hydroxide(LDH) nanoparticles coated with PEGylated phospholipid membrane. By comparing the size distribution and zeta potential, the weight ratio of LDH to lipid materials which constitute the outside membrane was identified as 2:1. Transmission electron microscopy photographs confirmed the core-shell structure of PEGylated phospholipid membrane coated LDH(PEG-PLDH)nanoparticles, and cell cytotoxicity assay showed their good cell viability on Hela and BALB/C-3 T3 cells over the concentration range from 0.5 to 50 μg/mL.

关键词： Preparation In vitro evaluation Layered double hydroxides Phospholipid membrane Size distribution Zeta potential

Demand Learning and Cooperative Deployment of UAV Networks

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Chinese Journal of Electronics 2022年第3期31卷 408-415页

作者： ZHANG Xiao WANG Xuehe XU Xinping ZHAO Yingchao South-Central University for Nationalities Caritas Institute of higher education Sun Yat-sen University & Guangdong Key Laboratory of Big Data Analysis and Processing Nanyang technological University

Unmanned aerial vehicle(UAV) as a powerful tool has found its applicability in assisting mobile users to deal with computation-intensive and delaysensitive applications(e.g., edge computing, high-speed Internet access, and local caching). However, deployment of UAV-aided mobile services(UMS) faces challenges due to the UAV limitation in wireless coverage and energy storage. Aware of such physical limitations, a future UMS system should be intelligent enough to self-plan trajectories and best offer computational capabilities to mobile users. There are important issues regarding the UAV-user interaction, UAV-UAV cooperation for sustainable service provision, and dynamic UMS pricing. These networking and resource management issues are largely overlooked in the literature and this article presents intelligent solutions for cooperative UMS deployment and operation. Mobile users’ locations are generally private information and changing over time. How to learn on-demand users’ truthful location reporting is important for determining optimal UAV deployment in serving all the users fairly. After addressing the truthful UAV-user interaction issue via game theory, we further study the UAV network sustainability for UMS provision by minimizing the energy consumption cost during deployment and seeking UAV-UAV cooperation. Finally, for profit-maximizing purpose, we analyze the cooperative UAVs’ deployment, capacity allocation, and dynamic service pricing.

关键词： UAV network sustainability UMS provision local caching path planning delay-sensitive applications future UMS system UAV-UAV cooperation Internet access wireless coverage mobile robots energy storage optimal UAV deployment Internet control engineering computing autonomous aerial vehicles unmanned aerial vehicle dynamic service pricing learning (artificial intelligence) game theory mobile computing UAV-aided mobile services edge computing UMS deployment sustainable service provision resource allocation UAV-user interaction issue on-demand users resource management issues dynamic UMS pricing computation-intensive applications

EXISTENCE AND STABILITY RESULTS FOR GENERALIZED FRACTIONAL DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2020年第1期40卷 141-154页

作者： A.BEN MAKHLOUF D.BOUCENNA M.A.HAMMAMI Department of Mathematics College of SciencesJouf UniversityAljoufSaudi Arabia Department of Mathematics Faculty of Sciences of SfaxBP 11713000 SfaxTunisia higher school for Professors of technological education SkikdaAlgeria

In this paper,a sufficient conditions to guarantee the existence and stability of solutions for generalized nonlinear fractional differential equations of orderα(1<α<2)are *** main results are obtained by using Krasnoselskii's fixed point theorem in a weighted Banach *** examples are given to demonstrate the validity of the proposed results.

关键词： nonlinear fractional differential equations stability analysis generalized fractional derivative Krasnoselskii's fixed point theorem

Native top-down proteomics comes into light

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Science China(Life Sciences) 2018年第11期61卷 1425-1427页

作者： Huilin Li school of Pharmaceutical Sciences Sun Yat-Sen UniversityGuangzhou Higher Education Mega Center

Mass spectrometry(MS)is a powerful technique for analyzing proteins and is utilized in an increasing number of biology studies that aim for a better understanding of their functional roles,ranging from proteomics wide profiling to protein complex characterization in their intact state(Lossl eta1.,2016).However,the measurement approach that we use impacts our view on proteins tremendously.

关键词： proteomics proteins use measurement

Surface plasmon-polaritons on ultrathin metal films

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Chinese Physics B 2011年第4期20卷 435-441页

作者：全军田英张军邵乐喜 school of Physics Science and Technology Zhanjiang Normal University school of Electrical and Electronic Engineering Nanyang Technological University Center of Liberal education Zhanjiang Normal University

We discuss the surface plasmon-polaritons used for ultrathin metal films with the aid of linear response theory and make comparisons with the known result given by Economou E N. In this paper we consider transverse electromagnetic fields and assume that the electromagnetic field in the linear response formula is the induced field due to the current of the electrons. It satisfies the Maxwell equation and thus we replace the current （charge） term in the Maxwell equation with the linear response expectation value. Finally, taking the external field to be zero, we obtain the dispersion relation of the surface plasmons from the eigenvalue equation. In addition, the charge-density and current-density in the z direction on the surface of ultrathin metal films are also calculated. The results may be helpful to the fundamental understanding of the complex phenomenon of surface plasmon-polaritons.

关键词： surface plasmon-polariton linear response theory dispersion relation ultrathin metal film