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2,199 results on '"Zhang, Ding"'

11. Design, synthesis, and characterization of novel copolymer gel particles for water-plugging applications

Author

Zhang Ding-Jun, Zhang Mei-Ju, Luo Zhan-Dong, and Zhang Sheng-Xiang

Subjects
functional ionic liquids, ionic liquids polymer, copolymerization reaction, green chemistry, Polymers and polymer manufacture, TP1080-1185
Abstract

Multi-stage plugging represents a promising strategy for enhancing production and injection rates in medium-and low-permeability oilfields. Despite its potential, the efficacy of current plugging agents, particularly hydrophobically bonded water-soluble polyacrylamide-based gel microspheres, is hindered by notable drawbacks such as low stability and inadequate compressive strength. Therefore, a comprehensive understanding of water plugging mechanisms coupled with the optimization of gel microsphere properties is essential for advancing the development of gel-based plugging agents with superior characteristics or intelligent regulatory capabilities. The P(AA-AM-[PrSO3]Vim) ionic liquid copolymerized gel particles were designed and synthesized by using microfluidic technique and titration gel method with AM, acrylic acid (AA), 1-vinylimidazole (Vim) and 1,3-propylsulfonyl lactone (PrSO3) as the raw materials. The morphology and structure of the copolymer gel particles were characterized, and the effects of [PrSO3]Vim and cross-linker content on the water-absorbing properties and strength of the gel particles were investigated. When the amount of [PrSO3]Vim was 12%, the concentration of crosslinker was 1.5%, and the temperature was 40°C, the water absorption capacity reached the maximum value of 163 g·g−1. The strength of the P(AA–AM–[PrSO3]Vim) spherical gel particles was maximized at a [PrSO3]Vim content of 4%. Furthermore, the chemical and physical roles of the P(AA–AM–[PrSO3]Vim) spherical gel particles were studied in a typical water-plugging environment. This study provides experimental data and a theoretical basis for the application of functional spherical gel-plugging particles in current oilfield environments.

Published
2024
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22. Control of the antitumour activity and specificity of CAR T cells via organic adapters covalently tethering the CAR to tumour cells

Author

Stepanov, Alexey V., Xie, Jia, Zhu, Qiaoqiao, Shen, Zuyuan, Su, Wenji, Kuai, Letian, Soll, Richard, Rader, Christoph, Shaver, Geramie, Douthit, Lacey, Zhang, Ding, Kalinin, Roman, Fu, Xiang, Zhao, Yingying, Qin, Tian, Baran, Phil S., Gabibov, Alexander G., Bushnell, David, Neri, Dario, Kornberg, Roger D., and Lerner, Richard A.

Published
2024
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26. Coexistence of linear and non-linear thermoelectricity in graphene-superconductor tunnel junctions.

Author

Bianco, Federica, Zhang, Ding, and Paolucci, Federico

Subjects
*THERMOELECTRIC effects, *HEAT engines, *ELECTROMAGNETIC radiation, *OPEN-circuit voltage, *SHORT-circuit currents
Abstract

We theoretically analyze the electronic transport properties of a monolayer graphene/insulator/superconductor (G I S) tunnel junction subject to a temperature gradient. For intrinsic graphene, the system shows always dissipative charge transport even in the presence of an electronic temperature difference between the two leads. Differently, the G I S produces a thermoelectric response when the graphene electrochemical potential is lifted to energies comparable to the zero-temperature gap of the superconductor, i.e., the system is particle–hole asymmetric. Indeed, the thermally biased G I S system is able to produce both a short-circuit Peltier current and an open-circuit Seebeck voltage. This thermoelectric effect is made of a linear conventional component, due to the intrinsic particle–hole asymmetry of the system, and a non-linear contribution, due to a further spontaneous particle–hole symmetry breaking. In most of the thermal and charge configurations of the G I S system, the linear component prevails. Concluding, the G I S system could be employed in the design of thermometers, electromagnetic radiation sensors, and heat engines with profound influence in superconducting quantum technologies. [ABSTRACT FROM AUTHOR]

Published
2024
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27. Product service supply chain network competition: an equilibrium with multiple tiers and members.

Author

Zhou, Xiaoyang, Gao, Chong, and Zhang, Ding

Subjects
SUPPLY chain management, DECISION making, SUPPLY chains, BUSINESS revenue, MANUFACTURING processes
Abstract

To overcome product homogenisation issues, an increasing number of supply chain members have been binding their competitive advantages to services which extend supply chain competition to a new dimension. This paper proposes a product service supply chain (PSSC) network competition model with multiple competing manufacturers and retailers offering demand-enhancing and costly services. In order to obtain the decision-making results in a non-cooperative game context, equilibrium conditions are established using variational inequality, and the qualitative properties are discussed. We compare the two competition scenarios, price competition only and simultaneous price and service competition, to discover the impact of service-offering on supply chain members. After introducing the service competition, both manufacturers and retailers realise higher profits and marginal profits with the same service costs. In contrast, the manufacturers' marginal profits achieve higher growth rates. We also find that (a) the increase of the demand sensitivities to the service levels of retailers would contribute more to the revenue growth of the whole PSSC network and (b) when service costs are different for manufacturers and retailers, the optimal decision-making on service levels are not only affected by the service costs of the members in the same tier but also correlated with those in other tiers. [ABSTRACT FROM AUTHOR]

Published
2024
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42. Targeting CD45 by gene-edited CAR T cells for leukemia eradication and hematopoietic stem cell transplantation preconditioning

Author

Stepanova, Valeria M., Volkov, Dmitry V., Osipova, Daria S., Wang, Wenjian, Hou, Yingqin, Pershin, Dmitry E., Fadeeva, Mariia S., Malakhova, Ekaterina A., Kulakovskaya, Elena A., Cuicui, Lui, Mingfeng, Zhao, Zhang, Hongkai, Xie, Jia, Zhang, Ding, Mamedov, Ilgar Z., Chernov, Alexandr S., Telegin, Georgij B., Rubtsov, Yuri P., Gabibov, Alexander G., Wu, Peng, Maschan, Michael A., and Stepanov, Alexey V.

Published
2024
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