Results 31 to 40 of about 23,032 (162)

Separation and Characterization of Vanadyl Porphyrins in Venezuela Orinoco Heavy Crude Oil

, 2015
Venezuela Orinoco heavy crude oil was sequentially separated into several subfractions to determine the contents and types of vanadyl porphyrins contained in the products.
Suoqi Zhao (1271715), Quan Shi (1261062), Yuanyuan Yan (1296984), Qingyu Zhang (443591), Yu Liu (6938), Keng Chung (1296987), Xu Zhao (133907), Chunming Xu (136095), Yahe Zhang (1261077), Murray R. Gray (1296990)   +9 more
core   +1 more source

Structural Engineering of Sonosensitive Nanohybrids by Active Vanadium Species toward Collapse of Multi‐Antioxidant Defenses and Boosted Therapy of Triple‐Negative Breast Cancer

Small Structures, Volume 6, Issue 6, June 2025.
A sonosensitive nanohybrid with defect structures is constructed through in situ etching deposition of vanadyl phosphate onto porphyrin metal–organic frameworks (MOFs), in which defects induce narrower bandgap and serve as charge traps for enhancing singlet oxygen generation under ultrasound irradiation. Additionally, released vanadium species overcome
Tingting Zhang, Jing Zhu, Yunyun Wu, Daqing Xia, Xiyue Xie, Lin Li, Zhenqiang Wang, Kaiyong Cai, Jixi Zhang   +8 more
wiley   +1 more source

Comparative Study of Resins and Asphaltenes of Heavy Oils as Sources for Obtaining Pure Vanadyl Porphyrins by the Sulfocationite-Based Chromatographic Method

, 2018
The resins and asphaltenes of three heavy oils differing in origin (Permian and Carboniferous) and vanadium content (0.025–0.165 wt %) have been studied as sources for isolation of spectrally pure vanadyl porphyrins by sulfocationite-based ...
Elvira Gabidullovna Tazeeva (4595335), Svetlana Gabidullinovna Yakubova, Nikolay Alexandrovich Mironov, Dmitry Valerevich Milordov, Makhmut Renatovich Yakubov (4595347), Guzalia Rashidovna Abilova, Makhmut Renatovich Yakubov, Guzalia Rashidovna Abilova (4595344), Svetlana Gabidullinovna Yakubova (4595350), Elvira Gabidullovna Tazeeva, Yulia Yurevna Borisova (4595341), Dmitry Valerevich Milordov (4694491), Yulia Yurevna Borisova, Nikolay Alexandrovich Mironov (4595356)   +13 more
core   +1 more source

Conjugated Porphyrin Tapes as Quantum Mediators for Vanadyl Qubits

, 2022
Vanadium(IV) magnetic centers are prime candidates as molecular quantum information units. One of the longstanding problems is to obtain an extendable scaffold that transmits the magnetic interaction to a degree usable for quantum processing, and allows upscaling to multiple centers, while preserving a sufficiently long coherence time.
Iago Pozo, Federico Lombardi, Dimitris Alexandropoulos, Fanmiao Kong, Jie-Ren Deng, Peter Horton, Simon Coles, William Myers, Lapo Bogani, Harry Anderson   +9 more
openaire   +1 more source

Geochemical Variations in Sedimentary Records of Oxygen‐Depleted Marine Environments in Representative Geological Periods: New Perspectives From an Independent Component Analysis

Paleoceanography and Paleoclimatology, Volume 40, Issue 4, April 2025.
Abstract Throughout the Phanerozoic, the oceans repeatedly became oxygen depleted and deposited marine sediments called black shales. The mechanisms responsible for the compositional variability of black shales deposited at different times and places, however, are not yet fully understood.
M. Yano, K. Yasukawa, K. Nakamura, J. Kuroda, M. Ikehara, H. Iwamori, Y. Kato   +6 more
wiley   +1 more source

Magnetic Molecules as Building Blocks for Quantum Technologies

Advanced Quantum Technologies, Volume 8, Issue 2, February 2025.
Quantum effects have led to advanced technologies like quantum sensing and computing, requiring precise manipulation of quantum states. Magnetic molecules are promising candidates for such tasks due to their controllable properties, coherence preservation, and ability to function as qubits or qudits.
Eufemio Moreno‐Pineda, Wolfgang Wernsdorfer   +1 more
wiley   +1 more source

Table_8_Postdiagenetic Bacterial Transformation of Nickel and Vanadyl Sedimentary Porphyrins of Organic-Rich Shale Rock (Fore-Sudetic Monocline, Poland).DOCX

, 2021
Nickel and vanadyl porphyrins belong to the so-called fossil geo- or sedimentary porphyrins. They occur in different types of organic matter-rich sediments but mostly occur in crude oils and their source rocks, oil shales, coals, and oil sands.
Robert Stasiuk (11770313), Renata Matlakowska (2309104)   +1 more
core   +1 more source

Advances in Exploring Mechanisms of Oxidative Phenolic Coupling Reactions

Advanced Synthesis &Catalysis, Volume 366, Issue 21, Page 4347-4384, November 5, 2024.
Abstract Biphenolic compounds serve as important scaffolds for the development of biologically active molecules. Among the methods for the synthesis of biarenols, oxidative coupling, which directly forms a C−C bond, has been extensively explored in various metal‐catalyzed (V, Cr, Co, Fe, Cu, etc.) reactions, electrochemical reactions, and photochemical
Haeun Choi, Sung‐Eun Suh, Houng Kang
wiley   +1 more source

Table_9_Postdiagenetic Bacterial Transformation of Nickel and Vanadyl Sedimentary Porphyrins of Organic-Rich Shale Rock (Fore-Sudetic Monocline, Poland).XLSX

, 2021
Nickel and vanadyl porphyrins belong to the so-called fossil geo- or sedimentary porphyrins. They occur in different types of organic matter-rich sediments but mostly occur in crude oils and their source rocks, oil shales, coals, and oil sands.
Robert Stasiuk (11770313), Renata Matlakowska (2309104)   +1 more
core   +1 more source

Spin‐bearing molecules as optically addressable platforms for quantum technologies

Nanophotonics, Volume 13, Issue 24, Page 4357-4379, November 2024.
Abstract Efforts to harness quantum hardware relying on quantum mechanical principles have been steadily progressing. The search for novel material platforms that could spur the progress by providing new functionalities for solving the outstanding technological problems is however still active.
Senthil Kumar Kuppusamy, David Hunger, Mario Ruben, Philippe Goldner, Diana Serrano   +4 more
wiley   +1 more source